Swartz Creek, Michigan Weather
Fireflies rise from the lawn. Day 78 of spring. Read this microseason across nine climate regions →
Swartz Creek weather forecast — hour by hour, 7-day outlook, NOAA radar
- TodayJun 5Drizzle66%0.09″84°61°—
- SaturdayJun 6Overcast48%—82°67°-2°
- SundayJun 7Overcast——76°56°-6°
- MondayJun 8Heavy Drizzle——81°56°+5°
- TuesdayJun 9Heavy Drizzle60%0.02″74°63°-7°
- WednesdayJun 10Light Drizzle35%—82°68°+8°
- ThursdayJun 11Thunderstorm16%—91°71°+9°
AQI 45 (Good), driven by PM2.5. AQI down 56 over the last 6 hours — air quality is improving sharply. PM2.5 at 6.8 µg/m³, PM10 at 7.4 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
Ozone × UV × Sky
Ozone at AQI 33. Overcast through the UV peak window (cloud cover ~67%) — afternoon ozone should stay flat.
- Present
- AQI 33
- UV peak
- 3.3 at 1 PM
- Sky at peak
- overcast
- Projected peak
- AQI 7
PM × Wind × Precip
PM2.5 at 6.8 µg/m³, PM10 at 7.4 µg/m³ — typical background levels with no transport signature.
- PM2.5/PM10
- 0.92
- Wind
- light
- 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).
The higher the clouds, the finer the weather.
- Moonrise
- 4:44 AM
- Moonset
- 2:34 PM
- In sign
- ♒︎ Aquarius
Fireflies rise from the lawn
Swartz Creek at a glance
- Today vs. normal: 11°F below 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 — Swartz Creek
SPC has placed Swartz Creek in the Marginal Risk category for severe thunderstorms tomorrow.
- TODAYTSTMGeneral Thunderstorms
- TOMORROWMRGLMarginal Risk
- DAY 3NONENo severe 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
Swartz Creek's warmest month is July (~71°F mean) and its coldest is January (~23°F). Rainfall peaks in May (3.7 inches) and bottoms out in February (1.7 inches).
| Month | Mean temp | Precip | Rainy days |
|---|---|---|---|
| January | 23° | 2.1″ | 6 |
| February | 25° | 1.7″ | 4 |
| March | 33° | 1.9″ | 5 |
| April | 46° | 3.4″ | 7 |
| May | 57° | 3.7″ | 7 |
| June | 67° | 3.1″ | 6 |
| July | 71° | 3.4″ | 6 |
| August | 69° | 3.3″ | 6 |
| September | 62° | 2.9″ | 6 |
| October | 50° | 3.0″ | 7 |
| November | 39° | 2.4″ | 6 |
| December | 29° | 2.1″ | 6 |
Regional context
Swartz Creek 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 Swartz Creek?
- Swartz Creek's last spring frost typically falls around mid-May, and the first fall frost arrives around mid-October.
- What is the rainy season in Swartz Creek?
- May is the wettest month with about 3.7 inches of rain on average; the city receives roughly 33 inches annually.
- What is the warmest month in Swartz Creek?
- July is typically warmest, averaging about 71°F.
- What is the coldest month in Swartz Creek?
- January is typically coldest, averaging about 23°F.
- When can I start a vegetable garden in Swartz Creek?
- 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 Swartz Creek get?
- Swartz Creek averages about 71 rainy days per year.
- What hardiness zone is Swartz Creek?
- Swartz Creek'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
Swartz Creek, Michigan sits in a warm-summer humid continental climate zone. January means hover near 23°F while July averages 71°F — a 48°F seasonal swing.
Across the year, Swartz Creek receives about 33 inches of precipitation spread over roughly 71 rainy days.
The rhythm of the year is set by latitude (43.0°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.