DeWitt, Michigan Weather
Fireflies rise from the lawn. Day 76 of spring. Read this microseason across nine climate regions →
DeWitt weather forecast — hour by hour, 7-day outlook, NOAA radar
- TodayJun 3Overcast——83°48°—
- ThursdayJun 4Overcast——86°55°+3°
- FridayJun 5Light Showers64%0.09″77°64°-9°
- SaturdayJun 6Showers64%—77°66°0°
- SundayJun 7Foggy10%—76°57°-1°
- MondayJun 8Overcast——80°55°+4°
- TuesdayJun 9Light Drizzle13%—84°65°+4°
Ozone at AQI 63 — peak already passed at 1 PM under clear skies. AQI up 25 in the last 6 hours — air quality is degrading. Levels should ease through evening.
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 63 — peak already passed at 1 PM under clear skies. Levels should ease through evening.
- Present
- AQI 63
- UV peak
- 5.0 at earlier today
- Sky at peak
- clear
- Projected peak
- AQI 63
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
- 3:41 AM
- Moonset
- 12:24 PM
- In sign
- ♑︎ Capricorn
Fireflies rise from the lawn
DeWitt at a glance
- Today vs. normal: 10°F above the seasonal normal for this latitude
- Last frost: May 3 (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 3, 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 — DeWitt
SPC has placed DeWitt in the General Thunderstorms category for severe thunderstorms day after tomorrow.
- TODAYNONENo severe risk
- TOMORROWNONENo severe risk
- 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.
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
DeWitt's warmest month is July (~72°F mean) and its coldest is January (~24°F). Rainfall peaks in June (3.8 inches) and bottoms out in February (1.7 inches).
| Month | Mean temp | Precip | Rainy days |
|---|---|---|---|
| January | 24° | 2.1″ | 5 |
| February | 26° | 1.7″ | 5 |
| March | 35° | 2.1″ | 6 |
| April | 47° | 3.3″ | 8 |
| May | 58° | 3.7″ | 7 |
| June | 68° | 3.8″ | 6 |
| July | 72° | 2.9″ | 6 |
| August | 70° | 3.5″ | 6 |
| September | 63° | 2.8″ | 5 |
| October | 51° | 3.2″ | 7 |
| November | 40° | 2.5″ | 5 |
| December | 30° | 1.9″ | 5 |
Regional context
DeWitt sits within a warm-summer humid continental climate region — a cohort that shares similar temperature ranges, seasonal patterns, and growing conditions across nearby cities.
Similar climates: Detroit, MI, Grand Rapids, MI, Lansing, MI, Ann Arbor, MI, Flint, MI.
Frequently asked
- When does it freeze in DeWitt?
- DeWitt's last spring frost typically falls around mid-May, and the first fall frost arrives around mid-October.
- What is the rainy season in DeWitt?
- June is the wettest month with about 3.8 inches of rain on average; the city receives roughly 33 inches annually.
- What is the warmest month in DeWitt?
- July is typically warmest, averaging about 72°F.
- What is the coldest month in DeWitt?
- January is typically coldest, averaging about 24°F.
- When can I start a vegetable garden in DeWitt?
- Cool-season crops (peas, lettuce) can be sown around the last spring frost (mid-May); warm-season crops (tomatoes, peppers) wait until 1–2 weeks after.
- How many rainy days does DeWitt get?
- DeWitt averages about 71 rainy days per year.
- What hardiness zone is DeWitt?
- DeWitt's USDA hardiness zone is determined by its lowest average winter temperature; check the USDA's online lookup with the city ZIP for the current zone designation.
Climate
DeWitt, Michigan sits in a warm-summer humid continental climate zone. January means hover near 24°F while July averages 72°F — a 48°F seasonal swing.
Across the year, DeWitt receives about 33 inches of precipitation spread over roughly 71 rainy days.
The rhythm of the year is set by latitude (42.8°N), proximity to large water bodies, and elevation — all of which shape what grows here, when frost is likely, and what the weather story looks like day to day.