Janesville, Wisconsin Weather
Honeysuckle sweetens the night. Day 90 of spring. Read this microseason across nine climate regions →
Janesville weather forecast — hour by hour, 7-day outlook, NOAA radar
- TodayJun 17Light Rain96%0.37″68°54°—
- ThursdayJun 18Drizzle15%0.03″69°58°+1°
- FridayJun 19Light Drizzle11%—69°52°0°
- SaturdayJun 20Overcast11%—71°53°+2°
- SundayJun 21Overcast58%—63°50°-8°
- MondayJun 22Overcast43%—70°46°+7°
- TuesdayJun 23Drizzle13%0.06″68°52°-2°
AQI 24 (Good), driven by Ozone. AQI flat over the last 6 hours (within ±3 points).
OK No precautions needed for the general population; unusually sensitive individuals may consider limiting prolonged outdoor exertion.
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
- 7:47 AM
- Moonset
- 10:43 PM
- In sign
- ♌︎ Leo
Honeysuckle sweetens the night
Janesville at a glance
- Today vs. normal: 7°F below the seasonal normal for this latitude
- Last frost: May 2 (climatological average for this latitude)
- Microseason: Jun 16–20
- Planting window: Stake and prune tomato suckers. Watch for squash vine borers.
16-Day Forecast — Janesville
- Wed66°54°96%
- Thu69°58°15%
- Fri69°52°11%
- Sat71°53°11%
- Sun63°50°58%
- Mon70°46°43%
- Tue68°52°13%
- Wed70°56°20%
- Thu74°52°29%
- Fri63°57°29%
- Sat68°60°23%
- Sun69°58°46%
- Mon75°60°43%
- Tue74°59°39%
- Wed74°62°42%
- Thu73°58°32%
Forecast data from Open-Meteo (CC BY 4.0).
Live wind & temperature near Janesville
Right now in the garden
Peak growing season
As of June 17, 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 Slight Risk category for severe thunderstorms today.
- TODAYSLGTSlight Risk
- TOMORROWNONENo severe risk
- DAY 3NONENo severe risk
Scattered severe storms possible. A few tornadoes, hail, and damaging wind gusts possible.
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
- 53545
- 53546
- 53548
- 53547