Sumter, South Carolina Weather
Heat settles and the rain begins. Day 89 of spring. Read this microseason across nine climate regions →
Sumter weather forecast — hour by hour, 7-day outlook, NOAA radar
- TodayJun 16Overcast24%—82°73°—
- WednesdayJun 17Thunderstorm49%0.54″86°72°+4°
- ThursdayJun 18Thunderstorm31%0.04″91°72°+5°
- FridayJun 19T-storm w/ Hail52%0.17″87°71°-4°
- SaturdayJun 20Thunderstorm42%—90°72°+3°
- SundayJun 21Overcast——96°69°+6°
- MondayJun 22Light Drizzle19%—99°73°+3°
AQI 42 (Good), driven by Ozone. AQI up 17 in the last 6 hours — air quality is degrading. Ozone at AQI 50 — peak already passed at 1 PM under overcast skies. 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 50 — peak already passed at 1 PM under overcast skies. Levels should ease through evening.
- Present
- AQI 50
- UV peak
- 2.0 at earlier today
- Sky at peak
- overcast
- Projected peak
- AQI 50
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).
Cut your thistles before St. John, you will have two instead of one.
- Moonrise
- 7:26 AM
- Moonset
- 9:45 PM
- In sign
- ♋︎ Cancer
Heat settles and the rain begins
Sumter at a glance
- Today vs. normal: 82°F — typical for the season
- Last frost: March 11 (climatological average for this latitude)
- Microseason: Jun 16–20
- Planting window: Stake and prune tomato suckers. Watch for squash vine borers.
16-Day Forecast — Sumter
- Tue82°73°24%
- Wed86°72°49%
- Thu91°72°31%
- Fri87°71°52%
- Sat90°72°42%
- Sun96°69°7%
- Mon99°73°19%
- Tue87°68°28%
- Wed91°68°28%
- Thu83°70°30%
- Fri88°70°27%
- Sat92°73°24%
- Sun93°73°33%
- Mon94°73°26%
- Tue94°74°35%
- Wed91°74°39%
Forecast data from Open-Meteo (CC BY 4.0).
Live wind & temperature near Sumter
Right now in the garden
Peak growing season
As of June 16, 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 — Sumter
SPC has placed Sumter in the General Thunderstorms category for severe thunderstorms today.
- TODAYTSTMGeneral Thunderstorms
- TOMORROWNONENo severe risk
- DAY 3TSTMGeneral Thunderstorms
Thunderstorms possible. Not severe, but capable of producing lightning and brief heavy rain.
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.
ZIP codes in Sumter
- 29154
- 29152
- 29153
- 29150
- 29151