Janesville, Wisconsin Climate
United States
Pop. 64,123 Elev. 257 m / 843 ft
TZ: America/Chicago (UTC-5) ·
Janesville is largely arid, with warm summers peaking at 84°F (29°C) in July and cold winters around 13°F (-11°C) in January. Humidity pushes the summer feels-like temperature to 91°F (33°C), while wind chill can drive winter lows to 4°F (-16°C). Precipitation occurs on roughly 46 days per year (28.2 in / 716 mm total), with snow on 7 days and 37 in (932 mm) of annual accumulation. The city averages 113 sunny days per year and around 25 thunderstorm days. Nearby lake water reaches 77°F (25°C) in summer.
| Temperature | 84°F (29°C) high | 13°F (-10°C) low |
| Feels like | 91°F (33°C) high | 4°F (-16°C) low |
| Rain | 46 days | 28.2 in (716 mm) /yr |
| Snow | 7 days | 36.7 in (932 mm) /yr |
| Sky | 113 sunny | 25 stormy |
| Wind | 2.4 mph (1.1 m/s) avg |
Looking for a place with a climate like Janesville? Explore and filter 150,000+ cities worldwide.
Explore on the MapMonthly Climate Chart
Best months to visit: Sep, Oct
Sky & Air by Month
Cloud cover (%)
54
Jan 63
Feb 58
Mar 65
Apr 59
May 55
Jun 57
Jul 50
Aug 39
Sep 46
Oct 58
Nov 77
Dec Humidity (%)
60
Jan 64
Feb 59
Mar 61
Apr 61
May 65
Jun 72
Jul 73
Aug 70
Sep 69
Oct 68
Nov 75
Dec Weather Days by Month
Water Temperatures
Cities with Similar Climate
Find similar cities on the map →Nearby Cities
Nearby
Commercial airport 34 mi Chicago Rockford International Airport (RFD)
Ski resort 30 mi Alpine Valley Resort
National park 99 mi Historic Pullman Foundation Exhibit Hall
Hospital 1 mi Mercy Health Hospital & Trauma Center
Hiking trail 1 mi IAT - Janesville Segment
Interested in Janesville?
Hotels
Flights
Real Estate
Insurance
Connectivity
Monthly Weather Data
↑ See chart| Month | Avg High | Avg Low | Rainfall | Snowfall | Sunny Days |
|---|---|---|---|---|---|
| January | 29°F -2°C | 13°F -10°C | 0.0 in 1 mm | 1.9 in48 mm | 11 |
| February | 32°F 0°C | 16°F -9°C | 0.2 in 6 mm | 7.9 in201 mm | 6 |
| March | 54°F 12°C | 32°F 0°C | 3.0 in 76 mm | 8.8 in225 mm | 7 |
| April | 60°F 15°C | 40°F 5°C | 2.4 in 60 mm | 0.3 in7 mm | 4 |
| May | 68°F 20°C | 49°F 9°C | 3.2 in 81 mm | — | 9 |
| June | 82°F 28°C | 64°F 18°C | 4.5 in 114 mm | — | 9 |
| July | 84°F 29°C | 68°F 20°C | 4.7 in 120 mm | — | 11 |
| August | 79°F 26°C | 62°F 17°C | 4.4 in 113 mm | — | 14 |
| September | 76°F 24°C | 56°F 13°C | 2.2 in 56 mm | — | 17 |
| October | 65°F 18°C | 47°F 9°C | 1.4 in 36 mm | — | 12 |
| November | 48°F 9°C | 33°F 1°C | 0.8 in 20 mm | 9.6 in245 mm | 10 |
| December | 32°F 0°C | 17°F -8°C | 1.3 in 34 mm | 8.1 in207 mm | 3 |
Weather Days by Month
↑ See chart| Month | Sunny Days | Storm Days |
|---|---|---|
| January | 11 | 0 |
| February | 6 | 0 |
| March | 7 | 2 |
| April | 4 | 1 |
| May | 9 | 2 |
| June | 9 | 4 |
| July | 11 | 5 |
| August | 14 | 5 |
| September | 17 | 4 |
| October | 12 | 1 |
| November | 10 | 0 |
| December | 3 | 1 |
Water Temperatures Data
↑ See chart| Month | Lake Avg High |
|---|---|
| January | 32°F 0°C |
| February | 32°F 0°C |
| March | 36°F 2°C |
| April | 46°F 8°C |
| May | 56°F 13°C |
| June | 69°F 21°C |
| July | 77°F 25°C |
| August | 72°F 22°C |
| September | 65°F 18°C |
| October | 58°F 14°C |
| November | 42°F 5°C |
| December | 32°F 0°C |