Grand Rapids, Michigan Weather
Fireflies rise from the lawn. Day 78 of spring. Read this microseason across nine climate regions →
Grand Rapids weather forecast — hour by hour, 7-day outlook, NOAA radar
- TodayJun 4Overcast——85°55°—
- FridayJun 5Heavy Rain62%1.3″78°66°-7°
- SaturdayJun 6Foggy23%—78°66°0°
- SundayJun 7Overcast——79°59°+1°
- MondayJun 8Drizzle18%—80°59°+1°
- TuesdayJun 9Light Drizzle52%—80°66°0°
- WednesdayJun 10Overcast25%—83°66°+3°
PM2.5 at 9.5 µg/m³ (AQI 52) with a 0.90 fine-to-coarse ratio and 5 mph wind — combustion smoke trapped in calm air, not road dust. AQI up 49 in the last 6 hours — air quality is degrading.
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 49. Overcast through the UV peak window (cloud cover ~100%) — afternoon ozone should stay flat.
- Present
- AQI 49
- UV peak
- 0.0 at 1 PM
- Sky at peak
- overcast
- Projected peak
- AQI 6
PM × Wind × Precip
PM2.5 at 9.5 µg/m³ (AQI 52) with a 0.90 fine-to-coarse ratio and 5 mph wind — combustion smoke trapped in calm air, not road dust.
- PM2.5/PM10
- 0.90
- Wind
- light
- 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).
The higher the clouds, the finer the weather.
- Moonrise
- 4:51 AM
- Moonset
- 2:41 PM
- In sign
- ♒︎ Aquarius
Fireflies rise from the lawn
Grand Rapids at a glance
- Today vs. normal: 6°F above the seasonal normal for this latitude
- Last frost: May 4 (climatological average for this latitude)
- Microseason: Jun 1–5
- Planting window: Harvest spring lettuce before it bolts. Sow heat-tolerant greens.
Right now in the garden
Peak growing season
As of June 5, 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 — Grand Rapids
SPC has placed Grand Rapids in the Marginal Risk category for severe thunderstorms tomorrow.
- TODAYNONENo severe risk
- TOMORROWMRGLMarginal Risk
- DAY 3TSTMGeneral Thunderstorms
Isolated severe storms possible. Limited threat for hail or damaging wind.
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.
Planting calendar
| Month | Plant | Harvest |
|---|---|---|
| January | — | — |
| February | — | — |
| March | — | — |
| April | — | — |
| May | lettuce, peas, spinach, radishes | lettuce, peas, radishes |
| June | lettuce, peas, spinach, radishes, tomatoes, peppers, beans, squash | lettuce, peas, radishes |
| July | tomatoes, peppers, beans, squash | tomatoes, beans, summer squash |
| August | tomatoes, peppers, beans, squash, fall brassicas, garlic (overwinter), carrots | tomatoes, beans, summer squash |
| September | fall brassicas, garlic (overwinter), carrots | tomatoes, beans, summer squash |
| October | — | winter squash, tomatoes (last) |
| November | — | — |
| December | — | — |
A year in weather
July brings Grand Rapids its warmest temperatures (~71°F mean) while January delivers the coldest (~24°F). Rainfall reaches its peak in May (4.4 inches) and drops to its lowest point in February (2.1 inches).
| Month | Mean temp | Precip | Rainy days |
|---|---|---|---|
| January | 24° | 2.7″ | 8 |
| February | 26° | 2.1″ | 7 |
| March | 34° | 2.6″ | 6 |
| April | 46° | 4.1″ | 9 |
| May | 58° | 4.4″ | 10 |
| June | 67° | 4.0″ | 8 |
| July | 71° | 3.3″ | 5 |
| August | 69° | 3.0″ | 6 |
| September | 62° | 3.5″ | 7 |
| October | 50° | 3.7″ | 10 |
| November | 39° | 3.3″ | 7 |
| December | 29° | 2.8″ | 8 |
Regional context
Grand Rapids falls within a warm-summer humid continental climate region. This places it among a group of nearby cities that share similar temperature ranges, seasonal patterns, and growing conditions.
Similar climates: Detroit, MI, Lansing, MI, Ann Arbor, MI, Flint, MI, Kalamazoo, MI.
Naturalist notes
By late May, American robins have typically completed their second broods across Grand Rapids neighborhoods.
Common lilacs finish their peak bloom period in early June, marking the transition into full summer.
Frequently asked
- When does it freeze in Grand Rapids?
- Grand Rapids typically sees its last spring frost around mid-May, with the first fall frost returning around mid-October.
- What is the rainy season in Grand Rapids?
- May stands as the wettest month with about 4.4 inches of rain on average, while the city receives roughly 40 inches annually.
- What is the warmest month in Grand Rapids?
- July typically brings the warmest weather, averaging about 71°F.
- What is the coldest month in Grand Rapids?
- January typically delivers the coldest temperatures, averaging about 24°F.
- When can I start a vegetable garden in Grand Rapids?
- Cool-season crops like peas and lettuce can be planted around the last spring frost (mid-May), while warm-season crops such as tomatoes and peppers should wait until 1–2 weeks after.
- How many rainy days does Grand Rapids get?
- Grand Rapids averages about 89 rainy days per year.
- What hardiness zone is Grand Rapids?
- Grand Rapids's USDA hardiness zone depends on its lowest average winter temperature. Check the USDA's online lookup with the city ZIP for the current zone designation.
Climate
Grand Rapids, Michigan experiences a warm-summer humid continental climate. January temperatures hover near 24°F while July averages 71°F, creating a 47°F seasonal swing.
Throughout the year, Grand Rapids receives about 40 inches of precipitation spread over roughly 89 rainy days.
Several factors shape the local weather patterns: latitude (43.0°N), proximity to large water bodies, and elevation. These elements determine what grows here, when frost is likely, and the daily weather patterns.