Janesville, Wisconsin Weather Forecast
Today in Janesville: clear skies with a high near 72°F and a low around 48°F. Rain chance 1%. No day tops a 20% rain chance through Thursday. Cooling trend: highs fall from 72°F today to 63°F by Monday.
Forecast updated 3:05 AM CDT, Oct 23
Active Weather Alerts
7-Day Forecast for Janesville
Today 10/23
72°48°
Sat 10/24
70°50°
Sun 10/25
71°51°
Mon 10/26
63°49°
Tue 10/27
62°46°
Wed 10/28
10%
67°47°
Thu 10/29
20%
64°48°
Next 24 Hours
| Now | 6 AM | 7 AM | 8 AM | 9 AM | 10 AM | 11 AM | 12 PM | 1 PM | 2 PM | 3 PM | 4 PM | 5 PM | 6 PM | 7 PM | 8 PM | 9 PM | 10 PM | 11 PM | Sat12 AM | 1 AM | 2 AM | 3 AM | 4 AM | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Sky |  | | | | | | | | | | | | | | |  | | | | | | | | |
| Temp | 49° | 48° | 48° | 49° | 55° | 60° | 65° | 68° | 70° | 72° | 72° | 72° | 69° | 65° | 61° | 59° | 57° | 56° | 55° | 54° | 54° | 53° | 52° | 51° |
| Rain | 0% | 0% | 0% | 0% | 0% | 0% | 0% | 0% | 0% | 0% | 0% | 0% | 1% | 1% | 1% | 1% | 1% | 1% | 1% | 1% | 1% | 2% | 2% | 3% |
| Wind | SE 2 | ESE 2 | SE 2 | SE 3 | SSE 4 | SSE 4 | S 5 | S 6 | S 7 | S 7 | SSE 7 | SSE 7 | SSE 6 | SE 5 | SE 6 | SE 5 | SE 5 | SE 5 | SE 5 | SE 5 | SSE 5 | SSE 5 | SSE 4 | SSE 5 |
Growing Conditions
Growing degree days
3,134
since Apr 1, base 50°F
Rain, last 30 days
1.21 in
model analysis
Rain, year to date
39.32 in
since Jan 1
2-inch soil temperature
53°F
yesterday, daily average
Reference ET, last 7 days
0.61 in
FAO-56 grass reference
Through Oct 22. Season totals use model analysis for this point and update every morning.
Soil, ET and spray tools for Janesville →
Current Stats & Observations
NWS Forecast
About Janesville Weather
Janesville sits at about 869 feet above sea level in Rock County, Wisconsin. About 70,755 people live in the Janesville area. Official forecasts and warnings for the area come from the National Weather Service MKX office, and the nearest NEXRAD radar site is KMKX. The city is in USDA plant hardiness zone 5b, where the coldest winter night typically falls between -15 to -10°F. Over the past ten years the last spring freeze has come around Apr 26 and the first fall freeze around Oct 29.
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