Horn Lake, Mississippi Weather
Fireflies pulse through the magnolias. Day 76 of spring. Read this microseason across nine climate regions →
Horn Lake weather forecast — hour by hour, 7-day outlook, NOAA radar
- TodayJun 3Mostly Clear——83°64°—
- ThursdayJun 4Overcast——83°64°0°
- FridayJun 5Overcast——84°61°+1°
- SaturdayJun 6Light Drizzle10%—86°66°+2°
- SundayJun 7Showers55%0.02″80°70°-6°
- MondayJun 8Light Showers61%—85°71°+5°
- TuesdayJun 9Heavy Drizzle43%—80°70°-5°
PM2.5 at 14.0 µg/m³, PM10 at 15.0 µg/m³ — typical background levels with no transport signature. AQI flat over the last 6 hours (within ±3 points).
OK No precautions needed for the general population; unusually sensitive individuals may consider limiting prolonged outdoor exertion.
What's driving it
Ozone × UV × Sky
Ozone at AQI 55 now. With UV 9.3 peaking around 1 PM under clear skies, surface ozone likely climbs to AQI 68 by mid-afternoon.
- Present
- AQI 55
- UV peak
- 9.3 at 1 PM
- Sky at peak
- clear
- Projected peak
- AQI 68
PM × Wind × Precip
PM2.5 at 14.0 µg/m³, PM10 at 15.0 µg/m³ — typical background levels with no transport signature.
- PM2.5/PM10
- 0.93
- 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).
The higher the clouds, the finer the weather.
- Moonrise
- 3:34 AM
- Moonset
- 1:16 PM
- In sign
- ♑︎ Capricorn
Fireflies pulse through the magnolias
Horn Lake at a glance
- Today vs. normal: 82°F — typical for the season
- Last frost: March 17 (climatological average for this latitude)
- Microseason: Jun 1–5
- Planting window: Harvest spring lettuce before it bolts. Sow heat-tolerant greens.
Right now in the garden
Peak growing season
As of June 3, 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.
Planting calendar
| Month | Plant | Harvest |
|---|---|---|
| January | — | — |
| February | — | — |
| March | lettuce, peas, spinach, radishes | — |
| April | lettuce, peas, spinach, radishes, tomatoes, peppers, beans, squash | — |
| May | tomatoes, peppers, beans, squash | lettuce, peas, radishes |
| June | tomatoes, peppers, beans, squash | lettuce, peas, radishes |
| July | — | tomatoes, beans, summer squash |
| August | — | tomatoes, beans, summer squash |
| September | — | tomatoes, beans, summer squash |
| October | fall brassicas, garlic (overwinter), carrots | winter squash, tomatoes (last) |
| November | fall brassicas, garlic (overwinter), carrots | — |
| December | — | — |
A year in weather
Horn Lake's warmest month is July (~83°F mean) and its coldest is January (~42°F). Rainfall peaks in April (5.9 inches) and bottoms out in September (3.0 inches).
| Month | Mean temp | Precip | Rainy days |
|---|---|---|---|
| January | 42° | 4.1″ | 6 |
| February | 46° | 4.5″ | 7 |
| March | 54° | 5.7″ | 8 |
| April | 63° | 5.9″ | 7 |
| May | 72° | 5.3″ | 7 |
| June | 80° | 4.0″ | 6 |
| July | 83° | 4.8″ | 6 |
| August | 82° | 3.4″ | 5 |
| September | 76° | 3.0″ | 4 |
| October | 65° | 4.0″ | 5 |
| November | 53° | 4.7″ | 6 |
| December | 45° | 5.5″ | 7 |
Regional context
Horn Lake sits within a humid subtropical climate region — a cohort that shares similar temperature ranges, seasonal patterns, and growing conditions across nearby cities.
Similar climates: Jackson, MS, Gulfport, MS, Hattiesburg, MS, Southaven, MS, Biloxi, MS.
Frequently asked
- When does it freeze in Horn Lake?
- Horn Lake's last spring frost typically falls around mid-March, and the first fall frost arrives around mid-December.
- What is the rainy season in Horn Lake?
- April is the wettest month with about 5.9 inches of rain on average; the city receives roughly 55 inches annually.
- What is the warmest month in Horn Lake?
- July is typically warmest, averaging about 83°F.
- What is the coldest month in Horn Lake?
- January is typically coldest, averaging about 42°F.
- When can I start a vegetable garden in Horn Lake?
- Cool-season crops (peas, lettuce) can be sown around the last spring frost (mid-March); warm-season crops (tomatoes, peppers) wait until 1–2 weeks after.
- How many rainy days does Horn Lake get?
- Horn Lake averages about 74 rainy days per year.
- What hardiness zone is Horn Lake?
- Horn Lake's USDA hardiness zone is determined by its lowest average winter temperature; check the USDA's online lookup with the city ZIP for the current zone designation.
Climate
Horn Lake, Mississippi sits in a humid subtropical climate zone. January means hover near 42°F while July averages 83°F — a 41°F seasonal swing.
Across the year, Horn Lake receives about 55 inches of precipitation spread over roughly 74 rainy days.
The rhythm of the year is set by latitude (35.0°N), proximity to large water bodies, and elevation — all of which shape what grows here, when frost is likely, and what the weather story looks like day to day.