Grand Rapids, Michigan Weather
Day 93 of summer. Read today’s microseason across nine climate regions →
Grand Rapids weather forecast — hour by hour, 7-day outlook, NOAA radar
Conditions updated 10:15 AM EDT · Open-Meteo
- TodaySep 21Overcast——63°49°—
- TuesdaySep 22Clear——64°46°+1°
- WednesdaySep 23Overcast——70°50°+6°
- ThursdaySep 24Overcast——73°51°+3°
- FridaySep 25Overcast——72°52°-1°
- SaturdaySep 26Overcast——67°53°-5°
- SundaySep 27Light Drizzle—0.05″60°56°-7°
Air quality now AQI 44 · Good
AQI 44 (Good), driven by PM2.5. AQI flat over the last 6 hours (within ±3 points). PM2.5 at 5.6 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 5.6 µg/m³, PM10 at 5.9 µg/m³ — typical background levels with no transport signature.
- PM2.5/PM10
- 0.95
- 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).
September dries up ditches or breaks down bridges.
- Moonrise
- 5:24 PM
- Moonset
- 1:53 AM
- In sign
- ♑︎ Capricorn
Grand Rapids at a glance
- Today vs. normal: Today averages 56°F (high 63°F, low 49°F), 7°F below the 63°F normal for Sep 21
- Last frost: May 6 (1991–2020 median, NOAA station 4 km away)
- Microseason: Sep 21–25
- Planting calendar: September — plant garlic (overwinter); harvest tomatoes, peppers, beans, summer squash, winter squash
16-Day Forecast — Grand Rapids
- Mon63°49°0%
- Tue64°46°1%
- Wed70°50°3%
- Thu73°51°1%
- Fri72°52°0%
- Sat67°53°0%
- Sun60°56°4%
- Mon76°55°5%
- Tue75°62°21%
- Wed72°56°24%
- Thu65°50°17%
- Fri60°44°13%
- Sat68°54°19%
- Sun61°50°19%
- Mon53°45°17%
- Tue57°41°16%
Forecast data from Open-Meteo (CC BY 4.0).
Live wind & temperature near Grand Rapids
Interactive wind and temperature map centered on Grand Rapids — it loads in your browser. Open the full weather map.
Right now in the garden
Fall planting + final harvests
As of September 21, the season's first frost (typically October 10) is approaching. Pick what frost-tender plants still carry before the next cold front. This city's planting calendar for September: plant garlic (overwinter); harvest tomatoes, peppers, beans, summer squash, and winter squash.
Sun & seasons in Grand Rapids
Grand Rapids sits in Kent County, where the year’s longest day runs 15h 21m of daylight and its shortest just 9h 0m — a swing of +6h 21m 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 136 miles to the ESE. The nearest town Grand Rapids tracks is Muskegon, roughly 35 miles to the WNW.
Air quality in Grand Rapids
Air quality in Grand Rapids’s county has trended dirtier since 2020; its cleanest year on record was 2020 (median AQI 39). See the full air-quality history for Grand Rapids.
Planting calendar
| Month | Plant | Harvest |
|---|---|---|
| April | lettuce, peas, spinach, radishes | — |
| May | lettuce, peas, spinach, radishes, tomatoes, peppers, beans, squash | lettuce, spinach, radishes |
| June | tomatoes, peppers, beans, squash | lettuce, peas, spinach, radishes |
| July | beans, squash, fall brassicas, carrots | lettuce, peas, spinach, beans, summer squash, garlic |
| August | — | peas, tomatoes, peppers, beans, summer squash, garlic |
| September | garlic (overwinter) | tomatoes, peppers, beans, summer squash, winter squash |
| October | — | tomatoes, peppers, beans, summer squash, winter squash, fall brassicas, carrots |
| November | — | fall brassicas, carrots |
A year in weather
Grand Rapids peaks at about 74°F in July and bottoms near 23°F in January; June brings the heaviest rain (3.8 inches) and February the least (2.0 inches).
| Month | Mean temp | Precip |
|---|---|---|
| January | 23° | 2.0″ |
| February | 24° | 2.0″ |
| March | 34° | 2.7″ |
| April | 47° | 3.5″ |
| May | 57° | 3.6″ |
| June | 68° | 3.8″ |
| July | 74° | 3.1″ |
| August | 73° | 3.1″ |
| September | 65° | 3.4″ |
| October | 53° | 3.1″ |
| November | 39° | 3.2″ |
| December | 28° | 2.6″ |
Regional context
Similar climates East Grand Rapids, MI, Walker, MI, Wyoming, MI
Drawing on modelled 1991-2020 normals (EC_Earth3P_HR model via Open-Meteo), Grand Rapids's January averages 23°F and July 74°F — 51°F apart — while precipitation totals roughly 36.2 inches.
Rainfall in Grand Rapids splits evenly between the seasons: June tops out at 3.8 inches, and February logs 2.0 inches — neither half of Grand Rapids's year dominates. That even rhythm groups Grand Rapids with places like East Grand Rapids, MI, Walker, MI and Wyoming, MI.
By May 6 the frosts ease in Grand Rapids, opening the season for kale, peas, spinach, and parsnips. Warm-soil crops in Grand Rapids wait about two weeks past Grand Rapids's last frost, once the soil warms. It shuts near October 10, when freezes return to Grand Rapids and tender plants need cover. Sheltered Grand Rapids yards can escape a light frost.
Similar climates: East Grand Rapids, MI, Walker, MI, Wyoming, MI, Comstock Park, MI, Kentwood, MI.
Frequently asked
- When does it freeze in Grand Rapids?
- Grand Rapids's last spring frost lands near May 6, and in Grand Rapids the first fall frost follows around October 10.
- What is the rainy season in Grand Rapids?
- June is the wettest month in Grand Rapids, about 3.8 inches on average; the year totals roughly 36 inches.
- What is the warmest month in Grand Rapids?
- Grand Rapids peaks in July, when the mean runs near 74°F.
- What is the coldest month in Grand Rapids?
- January is Grand Rapids's coldest month, averaging about 23°F.
- When can I start a vegetable garden in Grand Rapids?
- In Grand Rapids, sow peas and hardy greens around May 6; Grand Rapids's tomatoes and peppers wait two weeks more.
- What hardiness zone is Grand Rapids?
- With January around 23°F, Grand Rapids's zone reflects that minimum — the USDA ZIP map confirms Grand Rapids's band.
- What is the 10-day forecast for Grand Rapids?
- Grand Rapids's extended outlook — daily high and low temperatures and precipitation chances for each upcoming day — is in the daily forecast above.
- Will it rain this week in Grand Rapids?
- See this week's day-by-day rain chances for Grand Rapids in the daily forecast above, and the next 24 hours in the hourly chart.
- What is the weather like right now in Grand Rapids?
- Current conditions for Grand Rapids and the next 24 hours — temperature, precipitation chance, and wind by the hour — are in the hourly forecast chart above.
- How often is the Grand Rapids forecast updated?
- The Grand Rapids forecast on this page is built from Open-Meteo weather-model data and refreshes regularly through the day.
- When are sunrise and sunset in Grand Rapids?
- Today's sunrise and sunset times for Grand Rapids are in the Almanac section above, along with civil dawn, civil dusk, and day length. Day length is longest near the summer solstice and shortest near the winter solstice.
- How accurate is the weather forecast for Grand Rapids?
- The next few days in Grand Rapids's forecast are the most reliable; accuracy declines beyond about a week as weather-model uncertainty grows.
Grand Rapids sits at 43.0°N; its climate zone is warm-summer humid continental (Köppen approximation).
ZIP codes in Grand Rapids
- 49501
- 49502
- 49503
- 49504
- 49505
- 49506
- 49507
- 49508
- 49512
- 49514
- 49515
- 49523
- 49525
- 49534
- 49544
- 49546
- 49548
- 49555
- 49588
- 49599