Harper Woods, Michigan Weather
Fireflies rise from the lawn. Day 77 of spring. Read this microseason across nine climate regions →
Harper Woods weather forecast — hour by hour, 7-day outlook, NOAA radar
- TodayJun 4Overcast——89°55°—
- FridayJun 5Light Drizzle54%0.02″88°65°-1°
- SaturdayJun 6Light Showers68%0.02″80°66°-8°
- SundayJun 7Drizzle15%—79°62°-1°
- MondayJun 8Partly Cloudy——78°61°-1°
- TuesdayJun 9Overcast15%—85°66°+7°
- WednesdayJun 10Light Drizzle18%—82°70°-3°
Ozone at AQI 40. AQI down 13 over the last 6 hours (steady decline since this morning). Overcast through the UV peak window (cloud cover ~100%) — afternoon ozone should stay flat.
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 40. Overcast through the UV peak window (cloud cover ~100%) — afternoon ozone should stay flat.
- Present
- AQI 40
- UV peak
- 3.3 at 1 PM
- Sky at peak
- overcast
- Projected peak
- AQI 9
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).
A summer fog for fair, a winter fog for rain.
- Moonrise
- 4:08 AM
- Moonset
- 1:24 PM
- In sign
- ♑︎ Capricorn
Fireflies rise from the lawn
Harper Woods at a glance
- Today vs. normal: 13°F below the seasonal normal for this latitude
- 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 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 — Harper Woods
SPC has placed Harper Woods 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
Harper Woods's warmest month is July (~74°F mean) and its coldest is January (~26°F). Rainfall peaks in May (3.7 inches) and bottoms out in February (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
Harper Woods 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 Harper Woods?
- Harper Woods's last spring frost typically falls around mid-May, and the first fall frost arrives around mid-October.
- What is the rainy season in Harper Woods?
- May is the wettest month with about 3.7 inches of rain on average; the city receives roughly 35 inches annually.
- What is the warmest month in Harper Woods?
- July is typically warmest, averaging about 74°F.
- What is the coldest month in Harper Woods?
- January is typically coldest, averaging about 26°F.
- When can I start a vegetable garden in Harper Woods?
- 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 Harper Woods get?
- Harper Woods averages about 116 rainy days per year.
- What hardiness zone is Harper Woods?
- Harper Woods'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
Harper Woods, Michigan sits in a warm-summer humid continental climate zone. January means hover near 26°F while July averages 74°F — a 48°F seasonal swing.
Across the year, Harper Woods receives about 35 inches of precipitation spread over roughly 116 rainy days.
The rhythm of the year is set by latitude (42.4°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.