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

Oak Grove, Illinois Weather

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

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

Oak Grove, IL
Saturday, July 4 at 10:58 AM
80
°
Mostly Clear
Feels like
88°
Humidity
79%
Wind
7 mph
Sunrise
12:34 AM
Sunset
3:39 PM
Oak Grove, IL
Hour by hour · 24h
24-Hour ForecastOak Grove, IL: 24-hour forecast. Temperatures range from 69 to 85 degrees Fahrenheit with a 29% chance of precipitation at 1 PM.
L 69°H 85°
Oak Grove, IL
7-day forecast
  1. Today
    Jul 4
    Foggy
    46%
    —
    85°69°—
  2. Sunday
    Jul 5
    Overcast
    23%
    —
    85°69°0°
  3. Monday
    Jul 6
    Light Drizzle
    —
    —
    82°65°-3°
  4. Tuesday
    Jul 7
    Clear
    —
    —
    80°61°-2°
  5. Wednesday
    Jul 8
    Overcast
    10%
    —
    83°63°+3°
  6. Thursday
    Jul 9
    Thunderstorm
    36%
    —
    81°68°-2°
  7. Friday
    Jul 10
    Overcast
    24%
    —
    80°65°-1°
Oak Grove, IL
Next 24 hours · Mild now
HOT 90°64°77°90°6a12p6p12anow 77°high 85°low 69°PRECIP %
Oak Grove, IL
Anemometer · 24h winds · from true
NESW
From · True
SW
220° · backing 54°
Direction
SW
220°
Sustained
7
mph
Gust
10
mph
Peak 24h
20
avg 8
Beaufort · 2 · LIGHT 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 8 · pk 20 @ 4:00p
01020MPHB1B2B3B4B5-21h-18h-15h-12h-9h-6h-3h-24hNOWpk 137SUSTGUST
−24h−18h−12h−6hnow
A whisper of wind — leaves barely shift on the trees.
Oak Grove, IL
Barometer · 24h pressure · mb
STORMRAINCHANGEFAIRDRY9901000101010201030
Pressure · mb
989.9
+0.9 mb in 3h · rising · 29.23 inHg
Now
989.9
mb
3h
+0.9
mb
12h
-0.7
mb
24h
-3.1
mb
Regime · STORM
STORM
RAIN
CHANGE
FAIR
DRY
24h · Pressure · mb
range 988–993
9809859909951000STORM|RAIN-21h-18h-15h-12h-9h-6h-3h-24hNOW993.3988.3990.2
−24h−18h−12h−6hnow
The low is filling — pressure climbing out of storm territory.
Oak Grove, IL
Air quality
26
AQI
Good
→0 in 6h▲Peak ~41 @ 10 PM

AQI 26 (Good), driven by Ozone. AQI flat over the last 6 hours (within ±3 points). Ozone at AQI 36. Overcast through the UV peak window (cloud cover ~77%) — afternoon ozone should stay flat.

OK No precautions needed for the general population; unusually sensitive individuals may consider limiting prolonged outdoor exertion during the projected peak around 10 PM.

PM 2.5Good
6.1μg/m³
PM 10Good
8μg/m³
NO₂Good
5μg/m³
OzoneDRIVERModerate
77μg/m³
UV IndexModerate
2.2

What's driving it

Ozone × UV × Sky

Ozone at AQI 36. Overcast through the UV peak window (cloud cover ~77%) — afternoon ozone should stay flat.

Present
AQI 36
UV peak
3.1 at 1 PM
Sky at peak
overcast
Projected peak
AQI 7

PM × Wind × Precip

PM2.5 at 6.1 µg/m³, PM10 at 7.7 µg/m³ — typical background levels with no transport signature.

PM2.5/PM10
0.79
Wind
light
Recent rain
0h 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
Oak Grove, IL
Sky cover · visibility · 24h
Cloud cover
29%
MOSTLY CLEAR
100%0%−24h−18h−12h−6hnow
Visibility
37.1mi
UNLIMITED
56 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
15:58 UTC · Oak Grove, IL · 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
15:58 UTC · Oak Grove, IL · NOAA NESDIS / STAR · 5-min cadence · up to 10000 px
Oak Grove, IL
Satellite · infrared · animated
Oak Grove, IL
Loading IR frames…
IR · cloud-top temp© RainViewer · Carto
Oak Grove, IL
Almanac · Saturday, July 4
If the first of July be rainy weather, 'twill rain more or less for four weeks together.
Civil dawn
5:01 AM
Sunrise
12:34 AM
Daylight
15h 05m
Sunset
3:39 PM
Civil dusk
9:14 PM
Planting note
Harvest early potatoes. Begin drying onions on the surface.
Oak Grove, IL
The moon
Waning Gibbous
80% illuminated
Moonrise
10:58 PM
Moonset
10:07 AM
In sign
♓︎ Pisces
Oak Grove, IL
Microseason
Jul 1–5

Cicadas claim the afternoon

bird
Jan 151% of the yearDec 31

Read this microseason across nine climate regions →

Oak Grove at a glance

  • Today vs. normal: 10°F above the seasonal normal for this latitude
  • Last frost: April 24 (climatological average for this latitude)
  • Microseason: Jul 1–5
  • Planting window: Harvest early potatoes. Begin drying onions on the surface.

16-Day Forecast — Oak Grove

  1. Sat85°69°46%
  2. Sun85°69°23%
  3. Mon82°65°3%
  4. Tue80°61°1%
  5. Wed83°63°10%
  6. Thu81°68°36%
  7. Fri80°65°24%
  8. Sat85°66°16%
  9. Sun69°60°9%
  10. Mon75°56°8%
  11. Tue77°61°7%
  12. Wed81°65°15%
  13. Thu82°66°19%
  14. Fri82°68°20%
  15. Sat85°70°23%
  16. Sun86°72°29%

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

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 — Oak Grove

SPC has placed Oak Grove in the Marginal Risk category for severe thunderstorms today.

  • TODAYMRGLMarginal Risk
  • TOMORROWTSTMGeneral Thunderstorms
  • DAY 3NONENo severe risk

Isolated severe storms possible. Limited threat for hail or damaging wind.

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: Winter settles deep on the plains.January 6–10: Arctic cold grips the heartland.January 11–15: Sunlight returns to the sloped terrain.January 16–20: Ring-necked pheasants call from cover.January 21–25: Deepest cold locks the prairie.January 26–31: Deep winter's pivot point.February 1–5: February's first breath.February 6–10: Subtle shifts in the light.February 11–15: Bald eagles concentrate on open water.February 16–20: Cold rebound before the final thaw.February 21–25: First killdeer return to thawed fields.February 26–28: Winter's veil grows thin.March 1–5: Ice withdraws from the land.March 6–10: Hibernators wake to open air.March 11–15: Spring arrives with fury and grace.March 16–20: Sandhill Cranes Rise from the Platte.March 21–25: Equinox — Night and Day Hold Balance.March 26–31: First Green Breaks Through Brown Earth.April 1–5: Thunder Voices Wake the Prairie.April 6–10: Cliff Swallows Return to Mud Nests.April 11–15: Wild Geese Wing North in Massive Flocks.April 16–20: Rainbows Follow Afternoon Storms.April 21–25: Prairie Sedges Push Through Wet Soil.April 26–30: Last Frost Retreats North.May 1–5: Wildflowers Erupt Across the Prairie.May 6–10: Grain Rains Feed the Growing Fields.May 11–15: Seedlings Rise From Frost-Free Soil.May 16–20: Roses Bloom Along the Shelter Rows.May 21–25: Summer Arrives Early in Wind and Heat.May 26–31: Frogs Begin Their Nightly Chorus.June 1–5: Prairie lightning bugs rise.June 6–10: Earthworms surface after rain.June 11–15: Toward the solstice glow.June 16–20: Lesser ripening, greater heat.June 21–25: Solstice—sun at zenith.June 26–30: Fireflies in the darkening oak.July 1–5: Cicadas claim the afternoon.July 6–10: Warm wind sweeps the tallgrass.July 11–15: Thunder builds every afternoon.July 16–20: Corn tassels and reaches peak.July 21–25: Dog days settle in haze.July 26–31: Katydid chorus erupts at dusk.August 1–5: Great rains sometimes fall.August 6–10: Autumn's edge approaches.August 11–15: Cool wind rises from the north.August 16–20: Late summer wind through tallgrass.August 21–25: Dew settles on the tallgrass.August 26–31: Monarchs gather on prairie.September 1–5: Corn tassels and heavy skies.September 6–10: Purple asters rise on the prairie.September 11–15: Hawks ride thermal currents south.September 16–20: Equinox brings balance to day.September 21–25: Thunder stills across the plains.September 26–30: Snow geese wheel through the flyway.October 1–5: Prairie enters dormancy slowly.October 6–10: Geese gather on autumn waters.October 11–15: First widespread freeze arrives.October 16–20: Oaks turn bronze and russet.October 21–25: Frost deepens through the night.October 26–31: Light rains fall on frozen ground.November 1–5: Tallgrass turns gold.November 6–10: North wind strips the oak.November 11–15: Frost locks the prairie.November 16–20: Open sky grows cold.November 21–25: First snow falls soft.November 26–30: Blizzard drives the herds.December 1–5: Deep winter takes hold.December 6–10: Sky closes cold, winter reigns.December 11–15: Darkness deepens, life retreats.December 16–20: Rivers turn to stone.December 21–25: Solstice — sun begins 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 afternoon

Millions of periodical and annual cicadas emerge, their droning chorus filling the summer heat; the soundtrack of midsummer settles over prairie and wetland.

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

Oak Grove's warmest month is July (~76°F mean) and its coldest is January (~23°F). Rainfall peaks in June (5.0 inches) and bottoms out in January (1.7 inches).

MonthMean tempPrecipRainy days
January23°1.7″5
February28°1.8″5
March40°2.6″6
April51°3.8″7
May63°4.7″8
June72°5.0″8
July76°4.2″6
August73°4.0″6
September66°3.3″5
October54°2.8″5
November40°2.3″5
December29°2.0″5

Frequently asked

When does it freeze in Oak Grove?
Oak Grove's last spring frost lands near mid-April, and in Oak Grove the first fall frost follows around mid-November.
What is the rainy season in Oak Grove?
June is the wettest month in Oak Grove, about 5.0 inches on average; the year totals roughly 38 inches.
What is the warmest month in Oak Grove?
Oak Grove peaks in July, when the mean runs near 76°F.
What is the coldest month in Oak Grove?
January is Oak Grove's coldest month, averaging about 23°F.
When can I start a vegetable garden in Oak Grove?
Hardy spring crops go in near mid-April in Oak Grove; tender peppers and squash wait 10–14 days.
How many rainy days does Oak Grove get?
Expect roughly 69 wet days a year in Oak Grove.
What hardiness zone is Oak Grove?
With January around 23°F, Oak Grove's zone reflects that minimum — the USDA ZIP map confirms Oak Grove's band.
What is the 10-day forecast for Oak Grove?
Oak Grove'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 Oak Grove?
See this week's day-by-day rain chances for Oak Grove in the daily forecast above, and the next 24 hours in the hourly chart.
What is the weather like right now in Oak Grove?
Current conditions for Oak Grove and the next 24 hours — temperature, precipitation chance, and wind by the hour — are in the hourly forecast chart above.
How often is the Oak Grove forecast updated?
The Oak Grove forecast on this page is built from Open-Meteo weather-model data and refreshes regularly through the day.
When are sunrise and sunset in Oak Grove?
Today's sunrise and sunset times for Oak Grove 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 Oak Grove?
The next few days in Oak Grove's forecast are the most reliable; accuracy declines beyond about a week as weather-model uncertainty grows.

Climate

In Oak Grove, Illinois, the warm-summer humid continental climate runs from about 23°F in January to 76°F in July, a 53°F seasonal range.

Oak Grove sees close to 38 inches of precipitation annually, falling across some 69 wet days.

From 41.4°N, Oak Grove sees a 53°F seasonal swing that governs Oak Grove's planting and frost windows.

All cities in Illinois →

Davenport, IA weather →

ZIP codes in Oak Grove

  • 61264

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.