Janesville, Minnesota Weather
Cicadas claim the afternoon. Day 14 of summer. Read this microseason across nine climate regions →
Janesville weather forecast — hour by hour, 7-day outlook, NOAA radar
- TodayJul 4Overcast15%—84°66°—
- SundayJul 5Light Drizzle15%0.03″82°66°-2°
- MondayJul 6Overcast——84°66°+2°
- TuesdayJul 7Light Drizzle11%0.01″85°66°+1°
- WednesdayJul 8T-storm w/ Hail57%0.39″80°67°-5°
- ThursdayJul 9Overcast57%—78°63°-2°
- FridayJul 10Light Drizzle—0.01″83°60°+5°
AQI 35 (Good), driven by PM2.5. AQI up 6 over the last 6 hours (gradual rise). PM2.5 at 9.8 µg/m³ (AQI 52) with a 0.78 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 48 now. With UV 6.4 peaking around 1 PM under partly cloudy skies, surface ozone likely climbs to AQI 29 around 1 PM.
- Present
- AQI 48
- UV peak
- 6.4 at 1 PM
- Sky at peak
- partly cloudy
- Projected peak
- AQI 29
PM × Wind × Precip
PM2.5 at 9.8 µg/m³ (AQI 52) with a 0.78 fine-to-coarse ratio and 3 mph wind — combustion smoke trapped in calm air, not road dust.
- PM2.5/PM10
- 0.78
- 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
- 11:16 PM
- Moonset
- 10:16 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
- Sat84°66°15%
- Sun82°66°15%
- Mon84°66°2%
- Tue85°66°11%
- Wed80°67°57%
- Thu78°63°57%
- Fri83°60°7%
- Sat76°61°10%
- Sun73°55°14%
- Mon78°56°5%
- Tue81°58°7%
- Wed81°64°13%
- Thu84°60°19%
- Fri87°66°17%
- Sat88°68°24%
- Sun91°70°28%
Forecast data from Open-Meteo (CC BY 4.0).
Right now in the garden
Peak growing season
As of July 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 — Janesville
SPC includes Janesville in the general thunderstorm area today — no severe risk, but storms are possible.
- TODAYTSTMGeneral Thunderstorms
- TOMORROWTSTMGeneral Thunderstorms
- 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.
ZIP codes in Janesville
- 56048