St. Helen, Michigan Weather
Cicadas claim the afternoon. Day 14 of summer. Read this microseason across nine climate regions →
St. Helen weather forecast — hour by hour, 7-day outlook, NOAA radar
- TodayJul 4Light Drizzle20%—82°66°—
- SundayJul 5Overcast——78°62°-4°
- MondayJul 6Overcast——82°55°+4°
- TuesdayJul 7Overcast——87°56°+5°
- WednesdayJul 8Thunderstorm39%—84°64°-3°
- ThursdayJul 9Overcast39%—83°61°-1°
- FridayJul 10Overcast24%—82°56°-1°
AQI 33 (Good), driven by PM2.5. AQI down 9 over the last 6 hours (gradual decline). PM2.5 at 6.5 µg/m³ (AQI 36) with a 0.87 fine-to-coarse ratio and 4 mph wind — combustion smoke trapped in calm air, not road dust.
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 6.5 µg/m³ (AQI 36) with a 0.87 fine-to-coarse ratio and 4 mph wind — combustion smoke trapped in calm air, not road dust.
- PM2.5/PM10
- 0.87
- 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
- 11:39 PM
- Moonset
- 10:37 AM
- In sign
- ♓︎ Pisces
Cicadas claim the afternoon
St. Helen at a glance
- Today vs. normal: 67°F — typical for the season
- Last frost: May 12 (climatological average for this latitude)
- Microseason: Jul 1–5
- Planting window: Harvest early potatoes. Begin drying onions on the surface.
15-Day Forecast — St. Helen
- Sat83°66°20%
- Sun78°62°4%
- Mon82°55°2%
- Tue87°56°4%
- Wed84°64°39%
- Thu83°61°39%
- Fri82°56°24%
- Sat80°58°19%
- Sun72°58°10%
- Mon80°56°14%
- Tue67°59°15%
- Wed80°57°16%
- Thu85°62°37%
- Fri71°65°37%
- Sat79°55°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 — St. Helen
SPC includes St. Helen in the general thunderstorm area today — no severe risk, but storms are possible.
- TODAYTSTMGeneral Thunderstorms
- TOMORROWTSTMGeneral Thunderstorms
- DAY 3NONENo severe risk
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. Helen
- 48656