St. Clair, Michigan Weather
Cicadas claim the afternoon. Day 14 of summer. Read this microseason across nine climate regions →
St. Clair weather forecast — hour by hour, 7-day outlook, NOAA radar
- TodayJul 4Showers59%0.30″84°70°—
- SundayJul 5Light Drizzle51%0.02″77°66°-7°
- MondayJul 6Heavy Drizzle11%—76°63°-1°
- TuesdayJul 7Light Drizzle——80°60°+4°
- WednesdayJul 8Overcast——86°62°+6°
- ThursdayJul 9Light Drizzle32%—74°61°-12°
- FridayJul 10Overcast29%—79°60°+5°
AQI 35 (Good), driven by PM2.5. AQI down 27 over the last 6 hours — air quality is improving sharply. PM scrubbed by 4 hours of recent rain — PM2.5 down to 10.4 µg/m³, PM10 to 11.3 µg/m³.
OK No precautions needed for the general population; unusually sensitive individuals may consider limiting prolonged outdoor exertion.
What's driving it
PM × Wind × Precip
PM scrubbed by 4 hours of recent rain — PM2.5 down to 10.4 µg/m³, PM10 to 11.3 µg/m³.
- PM2.5/PM10
- 0.92
- Wind
- light
- Recent rain
- 4h 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).
If the first of July be rainy weather, 'twill rain more or less for four weeks together.
- Moonrise
- 11:28 PM
- Moonset
- 10:31 AM
- In sign
- ♓︎ Pisces
Cicadas claim the afternoon
St. Clair at a glance
- Today vs. normal: 70°F — typical for the season
- Last frost: May 3 (climatological average for this latitude)
- Microseason: Jul 1–5
- Planting window: Harvest early potatoes. Begin drying onions on the surface.
15-Day Forecast — St. Clair
- Sat87°69°59%
- Sun77°66°51%
- Mon76°63°11%
- Tue80°60°7%
- Wed86°62°9%
- Thu74°61°32%
- Fri79°60°29%
- Sat81°61°19%
- Sun78°61°18%
- Mon83°58°18%
- Tue73°63°15%
- Wed77°62°19%
- Thu83°61°33%
- Fri84°69°35%
- Sat72°57°22%
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. Clair
SPC includes St. Clair 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. Clair
- 48079