Warren, Michigan Weather
Fireflies rise from the lawn. Day 78 of spring. Read this microseason across nine climate regions →
Warren weather forecast — hour by hour, 7-day outlook, NOAA radar
- TodayJun 4Overcast——88°55°—
- FridayJun 5Heavy Drizzle42%0.07″88°61°0°
- SaturdayJun 6Rain52%0.18″86°69°-2°
- SundayJun 7Overcast——77°61°-9°
- MondayJun 8Overcast——78°62°+1°
- TuesdayJun 9Light Drizzle41%—80°67°+2°
- WednesdayJun 10Overcast33%—73°68°-7°
AQI 108 (Unhealthy for Sensitive Groups), driven by PM2.5. AQI up 14 over the last 6 hours (gradual rise). PM2.5 at 10.1 µg/m³ (AQI 53) with a 0.93 fine-to-coarse ratio and 6 mph wind — combustion smoke trapped in calm air, not road dust.
CAUTION Sensitive groups (children, elderly, respiratory conditions) should limit prolonged outdoor exertion.
What's driving it
Ozone × UV × Sky
Ozone at AQI 43 now. With UV 0.0 peaking around 1 PM under partly cloudy skies, surface ozone likely climbs to AQI 7 by mid-afternoon.
- Present
- AQI 43
- UV peak
- 0.0 at 1 PM
- Sky at peak
- partly cloudy
- Projected peak
- AQI 7
PM × Wind × Precip
PM2.5 at 10.1 µg/m³ (AQI 53) with a 0.93 fine-to-coarse ratio and 6 mph wind — combustion smoke trapped in calm air, not road dust.
- PM2.5/PM10
- 0.93
- 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
- 4:39 AM
- Moonset
- 2:31 PM
- In sign
- ♒︎ Aquarius
Fireflies rise from the lawn
Warren at a glance
- Today vs. normal: 71°F — typical for the season
- Last frost: May 1 (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 — Warren
SPC has placed Warren in the Marginal Risk category for severe thunderstorms day after tomorrow.
- TODAYNONENo severe risk
- TOMORROWTSTMGeneral Thunderstorms
- DAY 3MRGLMarginal Risk
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 is Warren's warmest month, with a mean near 74°F, and January is the coldest at about 26°F. Rainfall reaches its high point in May at 3.7 inches and drops to its low in February at 2.1 inches.
| Month | Mean temp | Precip | Rainy days |
|---|---|---|---|
| January | 26° | 2.1″ | 7 |
| February | 28° | 2.1″ | 7 |
| March | 37° | 2.5″ | 8 |
| April | 48° | 3.2″ | 11 |
| May | 59° | 3.7″ | 12 |
| June | 69° | 3.7″ | 12 |
| July | 74° | 3.4″ | 11 |
| August | 72° | 3.5″ | 12 |
| September | 65° | 3.0″ | 10 |
| October | 53° | 2.8″ | 9 |
| November | 41° | 2.6″ | 9 |
| December | 31° | 2.4″ | 8 |
Regional context
Warren belongs to a warm-summer humid continental climate region, a grouping that shares similar temperature ranges, seasonal patterns, and growing conditions with neighboring cities.
Similar climates: Detroit, MI, Grand Rapids, MI, Lansing, MI, Ann Arbor, MI, Flint, MI.
Naturalist notes
By late May, common milkweed has pushed up enough for monarch butterflies to lay eggs on the undersides of young leaves.
The waxing crescent moon of early June hangs low in the western sky after sunset, its terminator just sharp enough to reveal crater rims through binoculars.
Frequently asked
- When does it freeze in Warren?
- The last spring frost in Warren usually occurs around mid-May, and the first fall frost typically hits around mid-October.
- What is the rainy season in Warren?
- May brings the most rain, averaging about 3.7 inches; the city receives roughly 35 inches per year.
- What is the warmest month in Warren?
- July is normally the warmest month, averaging about 74°F.
- What is the coldest month in Warren?
- January is normally the coldest month, averaging about 26°F.
- When can I start a vegetable garden in Warren?
- Cool-season crops like peas and lettuce can be sown near the date of the last spring frost in mid-May; warm-season crops such as tomatoes and peppers should wait until one to two weeks past that date.
- How many rainy days does Warren get?
- Warren sees about 116 rainy days in an average year.
- What hardiness zone is Warren?
- The USDA hardiness zone for Warren is based on the lowest average winter temperature; the current zone can be confirmed by looking up the city ZIP code through the USDA's online tool.
Climate
Warren, Michigan falls within a warm-summer humid continental climate zone. Average temperatures swing from 26°F in January to 74°F in July — a 48°F range between winter and summer.
Precipitation totals roughly 35 inches per year, spread across about 116 rainy days.
Latitude (42.5°N), the influence of nearby large water bodies, and local elevation together set the seasonal rhythm. Those factors determine what can be grown, when frost is likely, and how daily weather unfolds.