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September 2025 Climate Summary

Current conditions at

Janesville-Rock County (KJVL)

Lat: 42.62°NLon: 89.04°WElev: 801ft.

Fair

66°F

19°C

Humidity	64%
Wind Speed	S 8 mph
Barometer	30.01 in
Dewpoint	54°F (12°C)
Visibility	10.00 mi
Last update	6 Oct 2:30 am CDT

More Information:

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

Extended Forecast for

2 Miles NW Alden IL

Overnight
Low: 63 °F
Mostly Clear
Monday
High: 78 °F
Mostly Sunny
then Showers
Likely
Monday Night
Low: 53 °F
Chance
T-storms then
Chance
Showers
Tuesday
High: 66 °F
Gradual
Clearing
Tuesday Night
Low: 42 °F
Clear
Wednesday
High: 64 °F
Sunny
Wednesday Night
Low: 40 °F
Mostly Clear
Thursday
High: 64 °F
Sunny
Thursday Night
Low: 44 °F
Partly Cloudy

Detailed Forecast

Overnight

Mostly clear, with a low around 63. South southwest wind around 10 mph.

Monday

A slight chance of showers before 3pm, then a chance of showers and thunderstorms between 3pm and 4pm, then showers likely and possibly a thunderstorm after 4pm. Increasing clouds, with a high near 78. South southwest wind around 10 mph becoming north northwest in the afternoon. Chance of precipitation is 60%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.

Monday Night

A chance of showers and thunderstorms. Cloudy, with a low around 53. North wind around 10 mph. Chance of precipitation is 50%.

Tuesday

Cloudy through mid morning, then gradual clearing, with a high near 66. North wind around 10 mph, with gusts as high as 15 mph.

Tuesday Night

Clear, with a low around 42. North northwest wind around 5 mph.

Wednesday

Sunny, with a high near 64.

Wednesday Night

Mostly clear, with a low around 40.

Thursday

Sunny, with a high near 64.