Weather StoryAlmanac, microseasons, and the day's weather story.

Indianapolis, Indiana Weather

Cicadas claim the scorching afternoon. Day 14 of summer. Read this microseason across nine climate regions →

Indianapolis weather forecast — hour by hour, 7-day outlook, NOAA radar

Indianapolis, IN
Saturday, July 4 at 6:24 PM
91
°
Overcast
Feels like
96°
Humidity
52%
Wind
9 mph
Sunrise
2:21 AM
Sunset
5:16 PM
Indianapolis, IN
Hour by hour · 24h
24-Hour ForecastIndianapolis, IN: 24-hour forecast. Temperatures range from 72 to 91 degrees Fahrenheit with a 49% chance of precipitation at 9 PM.
L 72°H 91°
Indianapolis, IN
7-day forecast
  1. Today
    Jul 4
    Heavy Rain
    49%
    0.96″
    91°72°—
  2. Sunday
    Jul 5
    Overcast
    20%
    —
    88°72°-3°
  3. Monday
    Jul 6
    Light Drizzle
    19%
    —
    78°70°-10°
  4. Tuesday
    Jul 7
    Mostly Clear
    —
    —
    83°64°+5°
  5. Wednesday
    Jul 8
    Overcast
    —
    —
    85°66°+2°
  6. Thursday
    Jul 9
    Thunderstorm
    54%
    0.02″
    85°71°0°
  7. Friday
    Jul 10
    T-storm w/ Hail
    54%
    0.07″
    87°72°+2°
Indianapolis, IN
Next 24 hours · Hot now
HOT 90°68°82°96°6p12a6a12pnow 91°high 91°low 72°PRECIP %
Indianapolis, IN
Anemometer · 24h winds · from true
NESW
From · True
SSW
207° · veering 10°
Direction
SSW
207°
Sustained
9
mph
Gust
12
mph
Peak 24h
20
avg 5
Beaufort · 3 · GENTLE BRZ
0
CALM
<1
1
LIGHT AIR
1–3
2
LIGHT BRZ
4–7
3
GENTLE BRZ
8–12
4
MOD BRZ
13–18
5
FRESH BRZ
19–24
6
STRONG BRZ
25–31
7
NEAR GALE
32–38
24h · sust vs gust · mph
avg 5 · pk 20 @ 2:00a
01020MPHB1B2B3B4B5-21h-18h-15h-12h-9h-6h-3h-24hNOWpk 149SUSTGUST
−24h−18h−12h−6hnow
Light breeze veering 10° from the ssw.
Indianapolis, IN
Barometer · 24h pressure · mb
STORMRAINCHANGEFAIRDRY9901000101010201030
Pressure · mb
987.4
-2.0 mb in 3h · falling · 29.16 inHg
Now
987.4
mb
3h
-2.0
mb
12h
-3.1
mb
24h
-3.7
mb
Regime · STORM
STORM
RAIN
CHANGE
FAIR
DRY
24h · Pressure · mb
range 987–991
9809859909951000STORM|RAIN-21h-18h-15h-12h-9h-6h-3h-24hNOW991.2987.4987.4
−24h−18h−12h−6hnow
Deep low still deepening — rough seas, strong wind, persistent rain.
Indianapolis, IN
Air quality
79
AQI
Moderate
↑+40 in 6h

AQI 79 (Moderate), driven by Ozone. AQI up 40 in the last 6 hours — air quality is degrading. Ozone at AQI 61 — peak already passed at 1 PM under clear skies. Levels should ease through evening.

OK No precautions needed for the general population; unusually sensitive individuals may consider limiting prolonged outdoor exertion.

PM 2.5Good
9.3μg/m³
PM 10Good
10μg/m³
NO₂Good
2μg/m³
OzoneDRIVERUnhealthy SG
114μg/m³
UV IndexLow
1.1

What's driving it

Ozone × UV × Sky

Ozone at AQI 61 — peak already passed at 1 PM under clear skies. Levels should ease through evening.

Present
AQI 61
UV peak
0.9 at earlier today
Sky at peak
clear
Projected peak
AQI 61

PM × Wind × Precip

PM2.5 at 9.3 µg/m³, PM10 at 10.3 µg/m³ — typical background levels with no transport signature.

PM2.5/PM10
0.90
Wind
light
Recent rain
1h in last 6h
Pattern
background

Trends

Seven days of AQI and PM2.5.

Hourly air-quality data from the Copernicus Atmosphere Monitoring Service, charted across the past and next several days. Dashed lines mark the AQI breakpoints at 50 (Good → Moderate) and 100 (Moderate → Unhealthy for Sensitive Groups).

7-DAY AQI TREND50100SATSUNMONTUEWEDTHUFRISAT7-DAY PM2.5 TREND · μg/m³300
Indianapolis, IN
Sky cover · visibility · 24h
Cloud cover
89%
OVERCAST
100%0%−24h−18h−12h−6hnow
Visibility
78.1mi
UNLIMITED
76 mi0 mi−24h−18h−12h−6hnow
Earth · GOES-19 ABI
Full Disk · Visible · GeoColor
GOES-19 full disk Visible · GeoColor
True-color daytime, blue/IR sandwich at night
22:24 UTC · Indianapolis, IN · NOAA NESDIS / STAR · up to 10848 px
Continental US · GOES-19 ABI
CONUS Sector · Visible · GeoColor
GOES-19 CONUS Visible · GeoColor
Daytime true-color, blue-light/IR sandwich at night
22:24 UTC · Indianapolis, IN · NOAA NESDIS / STAR · 5-min cadence · up to 10000 px
Indianapolis, IN
Satellite · infrared · animated
Indianapolis, IN
Loading IR frames…
IR · cloud-top temp© RainViewer · Carto
Indianapolis, IN
Almanac · Saturday, July 4
If the first of July be rainy weather, 'twill rain more or less for four weeks together.
Civil dawn
5:50 AM
Sunrise
2:21 AM
Daylight
14h 55m
Sunset
5:16 PM
Civil dusk
9:49 PM
Planting note
Harvest early potatoes. Begin drying onions on the surface.
Indianapolis, IN
The moon
Waning Gibbous
78% illuminated
Moonrise
11:39 PM
Moonset
10:50 AM
In sign
♓︎ Pisces
Indianapolis, IN
Microseason
Jul 1–5

Cicadas claim the scorching afternoon

bird
Jan 151% of the yearDec 31

Read this microseason across nine climate regions →

Indianapolis at a glance

  • Today vs. normal: 19°F above the seasonal normal for this latitude
  • Last frost: April 15 (climatological average for this latitude)
  • Microseason: Jul 1–5
  • Planting window: Harvest early potatoes. Begin drying onions on the surface.

ZIP codes: 46201, 46202, 46203, 46204, 46205, 46206, 46208, 46214 +30 more

16-Day Forecast — Indianapolis

  1. Sat91°72°49%
  2. Sun88°72°20%
  3. Mon78°70°19%
  4. Tue83°64°8%
  5. Wed85°66°5%
  6. Thu85°71°54%
  7. Fri87°72°54%
  8. Sat78°68°23%
  9. Sun76°60°13%
  10. Mon78°61°8%
  11. Tue78°60°7%
  12. Wed82°61°26%
  13. Thu85°63°23%
  14. Fri86°69°35%
  15. Sat80°69°48%
  16. Sun75°68°57%

Forecast data from Open-Meteo (CC BY 4.0).

Live wind & temperature near Indianapolis

Right now in the garden

Peak growing season

As of July 4, the growing season is at its peak — frost is months away. Continue succession-planting beans and summer squash. Start fall brassicas (broccoli, cabbage, kale) from seed indoors for transplanting in late summer.

SPC Convective Outlook

Storm Prediction Center — Indianapolis

SPC has placed Indianapolis in the Slight Risk category for severe thunderstorms today.

  • TODAYSLGTSlight Risk
  • TOMORROWTSTMGeneral Thunderstorms
  • DAY 3TSTMGeneral Thunderstorms

Scattered severe storms possible. A few tornadoes, hail, and damaging wind gusts possible.

Source: NOAA / NWS Storm Prediction Center categorical convective outlook. Outlooks are re-issued multiple times per day; this page reflects the most recent SPC polygons covering the city’s coordinates.

January 1–5: Frost quiets the live oaks.January 6–10: Still water thickens with ice.January 11–15: Springs begin to move beneath ice.January 16–20: Cardinal dawn calls grow bolder.January 21–25: Late January thaw pulses.January 26–31: Last freeze locks the land.February 1–5: February's lengthening light.February 6–10: Warming winds thaw the margin.February 11–15: Magnolia blooms break the gray.February 16–20: Mockingbirds resume the dawn chorus.February 21–25: Rain replaces the last snow.February 26–28: Mist clings to greening valleys.March 1–5: The green pulse awakens.March 6–10: Hibernators emerge to call.March 11–15: Dogwood and redbud ignite.March 16–20: Swallowtails emerge from winter silk.March 21–25: Light crowns the dogwood canopy.March 26–31: Redbud cascades over the thaw.April 1–5: Thunder announces the wet season.April 6–10: Barn swallows carve the warming sky.April 11–15: Magnolia blooms and falls in a breath.April 16–20: First rainbows arch over thunderheads.April 21–25: Reeds push through marsh water.April 26–30: Frost retreats; seedlings rise free.May 1–5: Warblers flood the canopy in waves.May 6–10: Tulip poplar lights the forest crown.May 11–15: Shad pulse upstream through rapids.May 16–20: Roses open on the Piedmont edge.May 21–25: Fireflies scout the humid dusk.May 26–31: Frog choruses rise from every wetland.June 1–5: Fireflies pulse through the magnolias.June 6–10: Kudzu climbs deeper into green.June 11–15: Sun climbs to its northern throne.June 16–20: Heat settles and the rain begins.June 21–25: The longest day turns toward shadow.June 26–30: Fireflies drift through Spanish moss.July 1–5: Cicadas claim the scorching afternoon.July 6–10: Thunderheads boil and break at dusk.July 11–15: Thunder builds each drowsy afternoon.July 16–20: Cicadas claim the long noon.July 21–25: Dog days drape the earth in haze.July 26–31: Katydids begin their rasping chorus.August 1–5: Dusk arrives one minute earlier each night.August 6–10: Meteorological summer's turning page.August 11–15: Cool winds gather at the margins.August 16–20: Dog-day cicadas rise.August 21–25: Heat breaks in creek beds.August 26–31: Monarchs gather strength.September 1–5: Harvests begin in earnest.September 6–10: Dew beads on resurrection fern.September 11–15: Raptors trail the thermals.September 16–20: Day and dark find balance.September 21–25: Thunder quiets the land.September 26–30: Insects retreat below.October 1–5: Swamp waters recede.October 6–10: Maples ignite the ridge.October 11–15: Asters crown the meadows.October 16–20: Crickets sing at dusk.October 21–25: Frost paints the garden.October 26–31: Light rains whisper down.November 1–5: Sweetgum Turns Crimson.November 6–10: Camellia Blooms Break Through.November 11–15: Earth Stiffens Underfoot.November 16–20: Bare Limbs Hold the Light.November 21–25: First Frost Grips the High Ground.November 26–30: North Wind Strips the Last Leaves.December 1–5: Darkness Falls Before Dinner.December 6–10: Winter Locks the Land.December 11–15: Wildlife Retreats to Shelter.December 16–20: Ice Edges Deepen Inward.December 21–25: The Sun Begins its Return.December 26–31: The Year Turns in Silence.🌱February 14 — First skunk-cabbage spathes thaw their way up☀️March 20 — Spring equinox — day and night balance🌸April 5 — Cherry blossoms peak in the parks🐦May 10 — Warbler migration peaks along the coast✨May 25 — First fireflies scout the meadows at dusk🌞June 21 — Summer solstice — longest day🦗July 25 — Peak cicada chorus in the afternoons🌊August 18 — Warmest sea-surface temperatures of the year🍂September 22 — Autumn equinox — the slow turn❄️October 25 — First widespread frost in the suburbs🍁November 10 — Peak leaf color across the Hudson Valley🌙December 21 — Winter solstice — longest night

Microseason · July 1–5

Cicadas claim the scorching afternoon

Dog-day cicadas emerge in waves, their rasp dominating every sunny hour; heat peaks above 90 degrees daily.

Day 185 of 365 · Wedge 37 of 72

The solar year drawn as a wheel of 72 five-day windows. Each wedge is one microseason; the four colored arcs mark winter, spring, summer, and autumn; the small icons sit at notable phenological events. The crimson pointer creeps clockwise as the year turns.

Planting calendar

MonthPlantHarvest
January——
February——
March——
Aprillettuce, peas, spinach, radishes—
Maylettuce, peas, spinach, radishes, tomatoes, peppers, beans, squashlettuce, peas, radishes
Junetomatoes, peppers, beans, squashlettuce, peas, radishes
Julytomatoes, peppers, beans, squashtomatoes, beans, summer squash
August—tomatoes, beans, summer squash
Septemberfall brassicas, garlic (overwinter), carrotstomatoes, beans, summer squash
Octoberfall brassicas, garlic (overwinter), carrotswinter squash, tomatoes (last)
November——
December——

A year in weather

July is Indianapolis's warmest stretch (~77°F) and January its coldest (~28°F); precipitation crests in May at 4.8 inches and ebbs in January to 2.5 inches.

MonthMean tempPrecipRainy days
January28°2.5″15
February31°2.7″14
March41°3.9″17
April53°4.3″17
May62°4.8″17
June72°3.8″15
July77°3.2″16
August76°2.9″15
September69°2.6″12
October57°2.9″11
November43°3.2″13
December31°3.5″15

Regional context

By the nearest station's NOAA NCEI 1991-2020 normals, Indianapolis sees 28°F Januarys and 77°F Julys, a 49°F range, plus around 40.2 inches of precipitation across 176 days.

No season owns Indianapolis's rain: May reaches 4.8 inches across 17.0 days and January keeps 2.5 inches on 15.3, an even spread through Indianapolis's year. That even rhythm groups Indianapolis with places like Spring Hill, IN, Wynnedale, IN and Warren Park, IN.

Indianapolis's growing window opens around mid-April, once Indianapolis's overnight lows stop freezing — sow kale, peas, spinach, and parsnips. Hold Indianapolis's tender crops — tomatoes, peppers, basil — until 10-14 days past Indianapolis's last frost. It shuts near mid-November, when freezes return to Indianapolis and tender plants need cover. Within Indianapolis, cold-air pooling chills low spots by 5-10°F, shifting Indianapolis's local frost dates.

Similar climates: Spring Hill, IN, Wynnedale, IN, Warren Park, IN, Rocky Ripple, IN, Beech Grove, IN.

Naturalist notes

By late May, American robins have typically finished their second broods in Indianapolis, with fledglings learning to forage in suburban lawns.

Wild bergamot begins blooming in June across central Indiana's prairies and woodland edges, attracting native bees and butterflies.

Frequently asked

When does it freeze in Indianapolis?
In Indianapolis, expect the last spring frost near mid-April; Indianapolis's first autumn frost comes around mid-November.
What is the rainy season in Indianapolis?
May is the wettest month in Indianapolis, about 4.8 inches on average; the year totals roughly 40 inches.
What is the warmest month in Indianapolis?
July is Indianapolis's warmest month, averaging about 77°F.
What is the coldest month in Indianapolis?
Indianapolis bottoms out in January, with a mean near 28°F.
When can I start a vegetable garden in Indianapolis?
Time tomatoes in Indianapolis for two weeks after mid-April; peas and greens start at Indianapolis's frost line.
How many rainy days does Indianapolis get?
Indianapolis records around 176 days of measurable precipitation annually.
What hardiness zone is Indianapolis?
Indianapolis's USDA zone comes from its January mean (28°F); enter the ZIP on the USDA lookup for the number.
What is the 10-day forecast for Indianapolis?
Indianapolis's extended outlook — daily high and low temperatures and precipitation chances for each upcoming day — is in the daily forecast above.
Will it rain this week in Indianapolis?
See this week's day-by-day rain chances for Indianapolis in the daily forecast above, and the next 24 hours in the hourly chart.
What is the weather like right now in Indianapolis?
Current conditions for Indianapolis and the next 24 hours — temperature, precipitation chance, and wind by the hour — are in the hourly forecast chart above.
How often is the Indianapolis forecast updated?
The Indianapolis forecast on this page is built from Open-Meteo weather-model data and refreshes regularly through the day.
When are sunrise and sunset in Indianapolis?
Today's sunrise and sunset times for Indianapolis are in the Almanac section above, along with civil dawn, civil dusk, and day length. Day length is longest near the summer solstice and shortest near the winter solstice.
How accurate is the weather forecast for Indianapolis?
The next few days in Indianapolis's forecast are the most reliable; accuracy declines beyond about a week as weather-model uncertainty grows.

Climate

Indianapolis, Indiana occupies a humid subtropical zone, with January means near 28°F and July around 77°F — a 49°F swing.

In a typical year Indianapolis records about 40 inches of precipitation on around 176 days.

The 49°F gap between Indianapolis's summer and winter, at 39.8°N, shapes Indianapolis's frost calendar.

All cities in Indiana →

ZIP codes in Indianapolis

  • 46234
  • 46237
  • 46218
  • 46219
  • 46217
  • 46214
  • 46260
  • 46268
  • 46226
  • 46225
  • 46183
  • 46231
  • 46235
  • 46236
  • 46239
  • 46254
  • 46250
  • 46208
  • 46201
  • 46203
  • 46202
  • 46205
  • 46204
  • 46206
  • 46256
  • 46259
  • 46227
  • 46224
  • 46222
  • 46221
  • 46220
  • 46229
  • 46228
  • 46113
  • 46278
  • 46241
  • 46240
  • 46207
  • 46209
  • 46230
  • 46242
  • 46244
  • 46245
  • 46247
  • 46251
  • 46253
  • 46255
  • 46262
  • 46277
  • 46282
  • 46283
  • 46285
  • 46288
  • 46298

Climate normals from the Open-Meteo Climate API. Köppen approximation from NOAA NCEI U.S. Climate Regions. See methodology for data sources, editorial rules, and corrections. Maintainer: Brian Tighe.