Fort Mill, South Carolina Weather
Fireflies pulse through the magnolias. Day 76 of spring. Read this microseason across nine climate regions →
Fort Mill weather forecast — hour by hour, 7-day outlook, NOAA radar
- TodayJun 3Mostly Clear——77°51°—
- ThursdayJun 4Clear——84°56°+7°
- FridayJun 5Overcast——89°60°+5°
- SaturdayJun 6Overcast——88°64°-1°
- SundayJun 7Overcast——93°67°+5°
- MondayJun 8Light Drizzle43%—84°71°-9°
- TuesdayJun 9Overcast26%—80°64°-4°
Ozone at AQI 88 — peak already passed at 1 PM under clear skies. AQI flat over the last 6 hours (within ±3 points). Levels should ease through evening.
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 88 — peak already passed at 1 PM under clear skies. Levels should ease through evening.
- Present
- AQI 88
- UV peak
- 6.5 at earlier today
- Sky at peak
- clear
- Projected peak
- AQI 88
PM × Wind × Precip
PM2.5 at 5.7 µg/m³, PM10 at 6.6 µg/m³ — typical background levels with no transport signature.
- PM2.5/PM10
- 0.86
- 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
- 2:56 AM
- Moonset
- 12:38 PM
- In sign
- ♑︎ Capricorn
Fireflies pulse through the magnolias
Fort Mill at a glance
- Today vs. normal: 3°F below the seasonal normal for this latitude
- 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
Fort Mill's warmest month is July (~80°F mean) and its coldest is January (~43°F). Rainfall peaks in June (4.1 inches) and bottoms out in October (2.9 inches).
| Month | Mean temp | Precip | Rainy days |
|---|---|---|---|
| January | 43° | 3.6″ | 6 |
| February | 46° | 3.1″ | 6 |
| March | 54° | 3.9″ | 7 |
| April | 62° | 3.7″ | 6 |
| May | 70° | 3.5″ | 6 |
| June | 77° | 4.1″ | 6 |
| July | 80° | 3.6″ | 6 |
| August | 79° | 3.7″ | 6 |
| September | 73° | 3.6″ | 5 |
| October | 63° | 2.9″ | 5 |
| November | 52° | 3.3″ | 5 |
| December | 45° | 3.6″ | 6 |
Regional context
Fort Mill sits within a humid subtropical climate region — a cohort that shares similar temperature ranges, seasonal patterns, and growing conditions across nearby cities.
Similar climates: Charleston, SC, Columbia, SC, Greenville, SC, Myrtle Beach, SC, Rock Hill, SC.
Frequently asked
- When does it freeze in Fort Mill?
- Fort Mill's last spring frost typically falls around mid-March, and the first fall frost arrives around mid-December.
- What is the rainy season in Fort Mill?
- June is the wettest month with about 4.1 inches of rain on average; the city receives roughly 43 inches annually.
- What is the warmest month in Fort Mill?
- July is typically warmest, averaging about 80°F.
- What is the coldest month in Fort Mill?
- January is typically coldest, averaging about 43°F.
- When can I start a vegetable garden in Fort Mill?
- 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 Fort Mill get?
- Fort Mill averages about 70 rainy days per year.
- What hardiness zone is Fort Mill?
- Fort Mill'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
Fort Mill, South Carolina sits in a humid subtropical climate zone. January means hover near 43°F while July averages 80°F — a 37°F seasonal swing.
Across the year, Fort Mill receives about 43 inches of precipitation spread over roughly 70 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.