Janesville

Home / Wisconsin / Janesville
Downtown Janesville looking south on Main Street.

Today’s Forecast:

88°F
Partly Cloudy
Station: KJVL
Observed at: 6:45 pm
Wind: 18 mph | Humidity: 70%

Tonight: Partly cloudy, with a low around 76. Heat index values as high as 100. Southwest wind 5 to 15 mph.

Today’s Report:

🚲 Biking

Use Caution
  49 /100

Use Caution for biking. High near 76°F. Low rain risk (7%). Breezy winds (15 mph).

  • Rain: Favorable conditions
  • Wind: Marginal weather factor
  • Thunderstorm: Favorable conditions

Golf

Use Caution
  49 /100

Use Caution for golf. High near 76°F. Low rain risk (7%). Breezy winds (15 mph).

  • Rain: Favorable conditions
  • Wind: Marginal weather factor
  • Thunderstorm: Favorable conditions

🥾 Hiking

Excellent
  98 /100

Excellent for hiking. High near 76°F. Low rain risk (7%). Light wind (15 mph).

  • Rain: Favorable conditions
  • Wind: Favorable conditions
  • Thunderstorm: Favorable conditions

About Janesville

Janesville is an easy place to make an outdoor day out of parks, riverfront paths, golf, biking, trails, and family-friendly stops. It is less about one giant destination and more about having several good choices close together.

Comfortable weather is ideal for parks, golf, and a ride or walk along the river. On hotter days, an earlier start helps. When rain or storms arrive, the city gives you enough nearby alternatives to stay flexible.

Make the Most of a Janesville Day

Use the first dry, comfortable window for the activity you care about most. Then add lower-commitment park time, food, shopping, or indoor stops around it.

Weather Tips for Janesville

Summer heat, afternoon storms, and occasional wind are the main things to watch. River and open park areas can feel more exposed than neighborhoods.

A few things worth watching before you head out:

  • Thunderstorms: Check timing before golf, trails, or open park plans.
  • Heat: Start earlier for biking, golf, and longer walks in summer.
  • Wind: Open river and park areas can feel breezier than expected.
  • Rain timing: A later shower may still leave a useful outdoor window.
  • Trail conditions: Natural trails can become muddy after heavy rain.

Plan Around the Conditions

Get outside during the best weather window, then leave room to shift to food, shopping, indoor attractions, or a shorter park stop if conditions change.

7-Day Forecast for Janesville:

88°F
Partly Cloudy
Station: KJVL
Observed at: 6:45 pm
Wind: 18 mph | Humidity: 70%
Wed
93° 76°
5%
Thu
92° 72°
35%
Fri
90° 70°
72%
Ind
85° 66°
64%
Sun
83° 65°
60%
Mon 🌧
84° 64°
18%
Tue
85° --°
11%

7-Day High Temperature Trend

93° Wed 92° Thu 90° Fri 85° Ind 83° Sun 84° Mon 85° Tue
Forecast data from the National Weather Service  |  Last Updated: June 30, 2026 7:30 pm CDT