National Weather Service

News Headlines

Review of the June 10 and 11, 2026 Derecho and QLCS

Hazardous Weather Conditions

Hazardous Weather Outlook

Current conditions at

Janesville-Rock County (KJVL)

Lat: 42.62° N Lon: 89.04° W Elev: 801 ft.

Partly Cloudy

73°F

23°C

Humidity	50%
Wind Speed	W 9 mph
Barometer	29.97 in
Dewpoint	54°F (12°C)
Visibility	10.00 mi
Last update	19 Jun 5:45 pm CDT

More Information:

Local Forecast Office More Local Wx 3 Day History Hourly Weather Forecast

Detailed forecast for

Rock County

Late This Afternoon

Mostly cloudy with scattered light showers and slight chance of thunderstorms. West winds 5 to 15 mph. Chance of precipitation 50 percent.

Tonight

Mostly cloudy with numerous light rain showers and slight chance of thunderstorms in the evening, then mostly cloudy with scattered light rain showers and slight chance of thunderstorms late in the evening. Partly cloudy after midnight. Lows in the mid 50s. West winds 5 to 10 mph. Chance of precipitation 70 percent.

Saturday

Sunny. Highs in the mid 70s. Northwest winds 5 to 15 mph.

Saturday Night

Partly cloudy. Lows in the lower 50s. Northwest winds up to 5 mph shifting to the northeast after midnight.

Sunday

Cloudy. Chance of light rain showers in the morning, then rain showers likely in the afternoon. Highs in the lower 70s. East winds up to 10 mph increasing to 10 to 15 mph in the afternoon. Chance of showers 70 percent.

Sunday Night

Mostly cloudy with rain showers likely through around midnight, then partly cloudy with chance of light rain showers after midnight. Lows in the lower 50s. Northeast winds 10 to 15 mph. Chance of showers 70 percent.

Monday

Partly sunny. Highs in the lower 70s.

Monday Night

Partly cloudy. Lows around 50.

Tuesday

Partly sunny. Highs in the mid 70s.

Tuesday Night

Mostly cloudy with chance of light rain showers and thunderstorms through around midnight, then partly cloudy with light rain showers likely and chance of thunderstorms after midnight. Lows in the mid 50s. Chance of precipitation 70 percent.

Wednesday

Partly sunny. Chance of light rain showers and slight chance of thunderstorms in the morning, then light rain showers likely and chance of thunderstorms in the afternoon. Highs in the mid 70s. Chance of precipitation 70 percent.

Wednesday Night

Mostly clear. A 20 percent chance of light rain showers and thunderstorms through around midnight. Lows in the lower 50s.

Thursday

Mostly sunny. A 20 percent chance of light rain showers and thunderstorms in the afternoon. Highs in the mid 70s.

Thursday Night

Partly cloudy. A 20 percent chance of light rain showers and thunderstorms through around midnight. Lows in the lower 50s.

Friday

Partly sunny. Slight chance of light rain showers in the morning, then chance of light rain showers and slight chance of thunderstorms in the afternoon. Highs in the upper 70s. Chance of precipitation 30 percent.