Janesville, Minnesota Weather
Cicadas claim the afternoon. Day 15 of summer. Read this microseason across nine climate regions →
Janesville weather forecast — hour by hour, 7-day outlook, NOAA radar
- TodayJul 5Foggy12%—82°64°—
- MondayJul 6Overcast——84°67°+2°
- TuesdayJul 7Thunderstorm33%—85°67°+1°
- WednesdayJul 8T-storm w/ Hail55%—85°68°0°
- ThursdayJul 9Overcast55%—81°62°-4°
- FridayJul 10Overcast——78°64°-3°
- SaturdayJul 11Overcast——83°62°+5°
AQI 36 (Good), driven by PM2.5. AQI flat over the last 6 hours (within ±3 points). PM2.5 at 8.4 µg/m³ (AQI 47) with a 0.82 fine-to-coarse ratio and 3 mph wind — combustion smoke trapped in calm air, not road dust.
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 47 — peak already passed at 1 PM under clear skies. Levels should ease through evening.
- Present
- AQI 47
- UV peak
- 6.0 at earlier today
- Sky at peak
- clear
- Projected peak
- AQI 47
PM × Wind × Precip
PM2.5 at 8.4 µg/m³ (AQI 47) with a 0.82 fine-to-coarse ratio and 3 mph wind — combustion smoke trapped in calm air, not road dust.
- PM2.5/PM10
- 0.82
- Wind
- calm
- 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).
If the first of July be rainy weather, 'twill rain more or less for four weeks together.
- Moonrise
- 11:36 PM
- Moonset
- 11:26 AM
- In sign
- ♓︎ Pisces
Cicadas claim the afternoon
Janesville at a glance
- Today vs. normal: 13°F above the seasonal normal for this latitude
- Last frost: May 11 (climatological average for this latitude)
- Microseason: Jul 1–5
- Planting window: Harvest early potatoes. Begin drying onions on the surface.
ZIP code: 56048
16-Day Forecast — Janesville
- Sun82°64°12%
- Mon84°67°1%
- Tue85°67°33%
- Wed85°68°55%
- Thu81°62°55%
- Fri78°64°8%
- Sat83°62°8%
- Sun91°66°6%
- Mon78°60°6%
- Tue76°57°6%
- Wed79°58°13%
- Thu84°61°13%
- Fri91°64°20%
- Sat94°69°23%
- Sun95°72°24%
- Mon94°72°27%
Forecast data from Open-Meteo (CC BY 4.0).
Right now in the garden
Peak growing season
As of July 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 — Janesville
SPC has placed Janesville in the Marginal Risk category for severe thunderstorms day after tomorrow.
- TODAYTSTMGeneral Thunderstorms
- 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.
ZIP codes in Janesville
- 56048