St. Helen, Michigan Weather
Night falls a minute earlier. Day 43 of summer. Read this microseason across nine climate regions →
St. Helen weather forecast — hour by hour, 7-day outlook, NOAA radar
- TodayAug 2Foggy23%—74°63°—
- MondayAug 3Clear——79°54°+5°
- TuesdayAug 4Clear——88°58°+9°
- WednesdayAug 5Overcast54%—84°60°-4°
- ThursdayAug 6Rain40%0.36″78°60°-6°
- FridayAug 7Clear11%—90°58°+12°
- SaturdayAug 8Thunderstorm12%—74°63°-16°
AQI 60 (Moderate), driven by PM2.5. AQI down 5 over the last 6 hours (gradual decline). PM2.5 at 5.8 µg/m³, PM10 at 5.9 µg/m³ — typical background levels with no transport signature.
OK No precautions needed for the general population; unusually sensitive individuals may consider limiting prolonged outdoor exertion.
What's driving it
PM × Wind × Precip
PM2.5 at 5.8 µg/m³, PM10 at 5.9 µg/m³ — typical background levels with no transport signature.
- PM2.5/PM10
- 0.98
- Wind
- breezy
- 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).
Red sky at night, sailor's delight.
- Moonrise
- 10:22 PM
- Moonset
- 10:42 AM
- In sign
- ♓︎ Pisces
Night falls a minute earlier
St. Helen at a glance
- Today vs. normal: 11°F above the seasonal normal for this latitude
- Last frost: May 12 (climatological average for this latitude)
- Microseason: Aug 1–5
- Planting window: Sow fall peas. Start kale and collard seedlings for fall.
16-Day Forecast — St. Helen
- Sun74°63°23%
- Mon79°54°1%
- Tue88°58°1%
- Wed84°60°54%
- Thu78°60°40%
- Fri90°58°11%
- Sat74°63°12%
- Sun86°64°30%
- Mon82°61°30%
- Tue80°57°18%
- Wed73°61°20%
- Thu83°67°39%
- Fri92°66°25%
- Sat85°62°19%
- Sun79°57°16%
- Mon71°58°29%
Forecast data from Open-Meteo (CC BY 4.0).
Right now in the garden
Peak growing season
As of August 2, 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.
Sun & seasons in St. Helen
St. Helen sits in Roscommon County, where the year’s longest day runs 15h 32m of daylight and its shortest just 8h 50m — a swing of +6h 41m between the June and December solstices. Clocks spring forward on Sunday, March 8, 2026 and fall back on Sunday, November 1, 2026.
Detroit, the state’s largest city, lies about 152 miles to the SSE. The nearest town St. Helen tracks is Interlochen, roughly 70 miles to the WNW.
ZIP codes in St. Helen
- 48656