Chelsea, Michigan Weather
Cicadas claim the afternoon. Day 14 of summer. Read this microseason across nine climate regions →
Chelsea weather forecast — hour by hour, 7-day outlook, NOAA radar
- TodayJul 4Rain55%0.19″84°68°—
- SundayJul 5Heavy Showers66%0.83″77°63°-7°
- MondayJul 6Heavy Drizzle23%0.01″72°62°-5°
- TuesdayJul 7Clear13%—82°59°+10°
- WednesdayJul 8Overcast11%—83°60°+1°
- ThursdayJul 9Light Drizzle38%—76°64°-7°
- FridayJul 10Overcast36%—81°59°+5°
AQI 41 (Good), driven by PM2.5. AQI down 18 over the last 6 hours — air quality is improving sharply. PM scrubbed by 3 hours of recent rain — PM2.5 down to 12.5 µg/m³, PM10 to 13.0 µg/m³.
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 34. Overcast through the UV peak window (cloud cover ~81%) — afternoon ozone should stay flat.
- Present
- AQI 34
- UV peak
- 3.3 at 1 PM
- Sky at peak
- overcast
- Projected peak
- AQI 8
PM × Wind × Precip
PM scrubbed by 3 hours of recent rain — PM2.5 down to 12.5 µg/m³, PM10 to 13.0 µg/m³.
- PM2.5/PM10
- 0.96
- Wind
- breezy
- Recent rain
- 3h 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
- 11:34 PM
- Moonset
- 10:38 AM
- In sign
- ♓︎ Pisces
Cicadas claim the afternoon
Chelsea at a glance
- Today vs. normal: 69°F — typical for the season
- Last frost: April 30 (climatological average for this latitude)
- Microseason: Jul 1–5
- Planting window: Harvest early potatoes. Begin drying onions on the surface.
ZIP code: 48118
15-Day Forecast — Chelsea
- Sat82°68°55%
- Sun77°63°66%
- Mon72°62°23%
- Tue82°59°13%
- Wed83°60°11%
- Thu76°64°38%
- Fri81°59°36%
- Sat80°61°22%
- Sun77°62°15%
- Mon83°60°15%
- Tue71°62°12%
- Wed78°58°17%
- Thu81°58°42%
- Fri81°62°33%
- Sat76°60°13%
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 — Chelsea
SPC includes Chelsea 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 Chelsea
- 48118