St. Simons, Georgia Weather
Cicadas claim the scorching afternoon. Day 14 of summer. Read this microseason across nine climate regions →
St. Simons weather forecast — hour by hour, 7-day outlook, NOAA radar
- TodayJul 4Overcast——89°73°—
- SundayJul 5Light Drizzle34%0.02″95°77°+6°
- MondayJul 6Light Drizzle36%—94°76°-1°
- TuesdayJul 7Drizzle22%—94°77°0°
- WednesdayJul 8Thunderstorm31%—93°76°-1°
- ThursdayJul 9Light Drizzle30%—95°76°+2°
- FridayJul 10Overcast21%—96°77°+1°
AQI 26 (Good), driven by Ozone. AQI flat over the last 6 hours (within ±3 points). Ozone at AQI 33 now. With UV 7.9 peaking around 1 PM under clear skies, surface ozone likely climbs to AQI 35 around 1 PM.
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 33 now. With UV 7.9 peaking around 1 PM under clear skies, surface ozone likely climbs to AQI 35 around 1 PM.
- Present
- AQI 33
- UV peak
- 7.9 at 1 PM
- Sky at peak
- clear
- Projected peak
- AQI 35
PM × Wind × Precip
PM2.5 at 5.1 µg/m³ (AQI 28) with a 0.72 fine-to-coarse ratio and 3 mph wind — combustion smoke trapped in calm air, not road dust.
- PM2.5/PM10
- 0.72
- Wind
- calm
- Recent rain
- 0h in last 6h
- Pattern
- stagnant smoke
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).
If the first of July be rainy weather, 'twill rain more or less for four weeks together.
- Moonrise
- 11:08 PM
- Moonset
- 10:39 AM
- In sign
- ♓︎ Pisces
Cicadas claim the scorching afternoon
St. Simons at a glance
- Today vs. normal: 6°F above the seasonal normal for this latitude
- Last frost: February 22 (climatological average for this latitude)
- Microseason: Jul 1–5
- Planting window: Harvest early potatoes. Begin drying onions on the surface.
16-Day Forecast — St. Simons
- Sat89°73°3%
- Sun95°77°34%
- Mon94°76°36%
- Tue94°77°22%
- Wed93°76°31%
- Thu95°76°30%
- Fri96°77°21%
- Sat96°78°20%
- Sun99°78°35%
- Mon99°80°34%
- Tue86°73°20%
- Wed87°75°38%
- Thu81°77°56%
- Fri87°77°48%
- Sat87°80°45%
- Sun88°77°39%
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 — St. Simons
SPC includes St. Simons in the general thunderstorm area today — no severe risk, but storms are possible.
- TODAYTSTMGeneral Thunderstorms
- TOMORROWTSTMGeneral Thunderstorms
- 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 St. Simons
- 31522