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Horn Lake, Mississippi Weather

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

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

Horn Lake, MS
Saturday, July 4 at 3:24 PM
94
°
Mostly Clear
Feels like
104°
Humidity
50%
Wind
4 mph
Sunrise
12:51 AM
Sunset
3:17 PM
Horn Lake, MS
Hour by hour · 24h
24-Hour ForecastHorn Lake, MS: 24-hour forecast. Temperatures range from 73 to 94 degrees Fahrenheit with a 36% chance of precipitation at 5 PM.
L 73°H 94°
Horn Lake, MS
7-day forecast
  1. Today
    Jul 4
    Light Drizzle
    36%
    0.03″
    94°74°—
  2. Sunday
    Jul 5
    Overcast
    17%
    —
    91°73°-3°
  3. Monday
    Jul 6
    T-storm w/ Hail
    52%
    —
    91°71°0°
  4. Tuesday
    Jul 7
    Overcast
    38%
    —
    91°71°0°
  5. Wednesday
    Jul 8
    Overcast
    17%
    —
    93°68°+2°
  6. Thursday
    Jul 9
    Mostly Clear
    19%
    —
    96°73°+3°
  7. Friday
    Jul 10
    Mostly Clear
    28%
    —
    98°77°+2°
Horn Lake, MS
Next 24 hours · Hot now
HOT 90°68°83°98°12p6p12a6anow 94°high 94°low 73°PRECIP %
Horn Lake, MS
Anemometer · 24h winds · from true
NESW
From · True
WNW
294° · veering 56°
Direction
WNW
294°
Sustained
4
mph
Gust
5
mph
Peak 24h
19
avg 4
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 4 · pk 19 @ 10:00p
01020MPHB1B2B3B4B5-21h-18h-15h-12h-9h-6h-3h-24hNOWpk 153SUSTGUST
−24h−18h−12h−6hnow
A whisper of wind — leaves barely shift on the trees.
Horn Lake, MS
Barometer · 24h pressure · mb
STORMRAINCHANGEFAIRDRY9901000101010201030
Pressure · mb
1003.2
-2.6 mb in 3h · falling rapidly · 29.62 inHg
Now
1003.2
mb
3h
-2.6
mb
12h
-1.8
mb
24h
-2.2
mb
Regime · RAIN
STORM
RAIN
CHANGE
FAIR
DRY
24h · Pressure · mb
range 1003–1006
9951000STORM|RAIN10051010RAIN|CHG1015CHG|FAIR-21h-18h-15h-12h-9h-6h-3h-24hNOW1006.31003.31003.3
−24h−18h−12h−6hnow
Pressure giving way — clouds thicken and rain edges closer.
Horn Lake, MS
Air quality
48
AQI
Good
↑+6 in 6h▲Peak ~79 @ 11 PM

AQI 48 (Good), driven by Ozone. AQI up 6 over the last 6 hours (gradual rise). Ozone at AQI 86 — peak already passed at 1 PM under partly cloudy skies. Levels should ease through evening.

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

PM 2.5Moderate
14.4μg/m³
PM 10Good
18μg/m³
NO₂Good
1μg/m³
OzoneDRIVERUnhealthy SG
129μg/m³
UV IndexHigh
6.5

What's driving it

Ozone × UV × Sky

Ozone at AQI 86 — peak already passed at 1 PM under partly cloudy skies. Levels should ease through evening.

Present
AQI 86
UV peak
6.2 at earlier today
Sky at peak
partly cloudy
Projected peak
AQI 86

PM × Wind × Precip

PM scrubbed by 2 hours of recent rain — PM2.5 down to 14.4 µg/m³, PM10 to 17.9 µg/m³.

PM2.5/PM10
0.80
Wind
calm
Recent rain
2h in last 6h
Pattern
washed out

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
Horn Lake, MS
Sky cover · visibility · 24h
Cloud cover
25%
MOSTLY CLEAR
100%0%−24h−18h−12h−6hnow
Visibility
78.1mi
UNLIMITED
84 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
20:24 UTC · Horn Lake, MS · 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
20:24 UTC · Horn Lake, MS · NOAA NESDIS / STAR · 5-min cadence · up to 10000 px
Horn Lake, MS
Satellite · infrared · animated
Horn Lake, MS
Loading IR frames…
IR · cloud-top temp© RainViewer · Carto
Horn Lake, MS
Almanac · Saturday, July 4
If the first of July be rainy weather, 'twill rain more or less for four weeks together.
Civil dawn
5:23 AM
Sunrise
12:51 AM
Daylight
14h 26m
Sunset
3:17 PM
Civil dusk
8:48 PM
Planting note
Harvest early potatoes. Begin drying onions on the surface.
Horn Lake, MS
The moon
Waning Gibbous
79% illuminated
Moonrise
10:48 PM
Moonset
10:11 AM
In sign
♓︎ Pisces
Horn Lake, MS
Microseason
Jul 1–5

Cicadas claim the scorching afternoon

bird
Jan 151% of the yearDec 31

Read this microseason across nine climate regions →

Horn Lake at a glance

  • Today vs. normal: 17°F above the seasonal normal for this latitude
  • Last frost: March 17 (climatological average for this latitude)
  • Microseason: Jul 1–5
  • Planting window: Harvest early potatoes. Begin drying onions on the surface.

ZIP code: 38637

16-Day Forecast — Horn Lake

  1. Sat94°74°36%
  2. Sun91°73°17%
  3. Mon91°71°52%
  4. Tue91°71°38%
  5. Wed93°68°17%
  6. Thu96°73°19%
  7. Fri98°77°28%
  8. Sat89°72°23%
  9. Sun84°67°17%
  10. Mon84°63°11%
  11. Tue87°63°8%
  12. Wed90°66°13%
  13. Thu87°69°24%
  14. Fri90°71°26%
  15. Sat90°71°23%
  16. Sun77°68°24%

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 — Horn Lake

SPC has placed Horn Lake in the Marginal Risk category for severe thunderstorms today.

  • TODAYMRGLMarginal Risk
  • TOMORROWTSTMGeneral Thunderstorms
  • DAY 3TSTMGeneral Thunderstorms

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: 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——
Marchlettuce, peas, spinach, radishes—
Aprillettuce, peas, spinach, radishes, tomatoes, peppers, beans, squash—
Maytomatoes, peppers, beans, squashlettuce, peas, radishes
Junetomatoes, peppers, beans, squashlettuce, peas, radishes
July—tomatoes, beans, summer squash
August—tomatoes, beans, summer squash
September—tomatoes, beans, summer squash
Octoberfall brassicas, garlic (overwinter), carrotswinter squash, tomatoes (last)
Novemberfall brassicas, garlic (overwinter), carrots—
December——

A year in weather

The year in Horn Lake tops out in July (~83°F) and dips lowest in January (~42°F), with April wettest at 5.9 inches and September driest at 3.0 inches.

MonthMean tempPrecipRainy days
January42°4.1″6
February46°4.5″7
March54°5.7″8
April63°5.9″7
May72°5.3″7
June80°4.0″6
July83°4.8″6
August82°3.4″5
September76°3.0″4
October65°4.0″5
November53°4.7″6
December45°5.5″7

Regional context

Per NOAA NCEI 1991-2020 normals, Horn Lake runs from a 42°F January mean to 83°F in July, a 41°F seasonal spread, with near 54.9 inches of precipitation across about 74 wet days.

Rainfall in Horn Lake stays even across the calendar: April tops out at 5.9 inches over 7.2 rainy days, and September still logs 3.0 inches across 4.1 — a narrow range for Horn Lake. It is a balanced pattern Horn Lake shares with places like Lynchburg, MS, Southaven, MS and Lakeview, MS.

Around mid-March, Horn Lake sheds its freezing nights — peas, lettuce, spinach, and radishes go into Horn Lake's beds. Heat-demanding starts go out a fortnight on in Horn Lake, after the soil warms and cold snaps clear. By mid-December, frost is back in Horn Lake — protect or harvest anything tender. A creek-bottom lot in Horn Lake can lag Horn Lake's last frost 7-10 days behind a south slope.

Similar climates: Lynchburg, MS, Southaven, MS, Lakeview, MS, Walls, MS, Hernando, MS.

Frequently asked

When does it freeze in Horn Lake?
In Horn Lake, expect the last spring frost near mid-March; Horn Lake's first autumn frost comes around mid-December.
What is the rainy season in Horn Lake?
Rainfall in Horn Lake peaks in April near 5.9 inches, out of about 55 inches annually.
What is the warmest month in Horn Lake?
July is Horn Lake's warmest month, averaging about 83°F.
What is the coldest month in Horn Lake?
Horn Lake bottoms out in January, with a mean near 42°F.
When can I start a vegetable garden in Horn Lake?
Frost-hardy sowings begin at mid-March in Horn Lake; warm-season starts follow two weeks on.
How many rainy days does Horn Lake get?
Horn Lake averages about 74 days with measurable rain or snow each year.
What hardiness zone is Horn Lake?
Horn Lake's USDA zone comes from its January mean (42°F); enter the ZIP on the USDA lookup for the number.
What is the 10-day forecast for Horn Lake?
Horn Lake'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 Horn Lake?
See this week's day-by-day rain chances for Horn Lake in the daily forecast above, and the next 24 hours in the hourly chart.
What is the weather like right now in Horn Lake?
Current conditions for Horn Lake and the next 24 hours — temperature, precipitation chance, and wind by the hour — are in the hourly forecast chart above.
How often is the Horn Lake forecast updated?
The Horn Lake forecast on this page is built from Open-Meteo weather-model data and refreshes regularly through the day.
When are sunrise and sunset in Horn Lake?
Today's sunrise and sunset times for Horn Lake 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 Horn Lake?
The next few days in Horn Lake's forecast are the most reliable; accuracy declines beyond about a week as weather-model uncertainty grows.

Climate

Horn Lake, Mississippi occupies a humid subtropical zone, with January means near 42°F and July around 83°F — a 41°F swing.

Yearly precipitation in Horn Lake totals around 55 inches, spread over about 74 days of rain or snow.

The 41°F gap between Horn Lake's summer and winter, at 35.0°N, shapes Horn Lake's frost calendar.

All cities in Mississippi →

Memphis, TN weather →

ZIP codes in Horn Lake

  • 38637

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.