Currently: 19 °F. Overcast. (Weather station: Janesville / Rock County, USA). See more current weatherPast Weather in Janesville — Graph
Janesville Temperature Yesterday
Maximum temperature yesterday: 16 °F (at 2:45 pm)
Minimum temperature yesterday: -6 °F (at 6:45 am)
Average temperature yesterday: 4 °F
High & Low Weather Summary for the Past Weeks
| Temperature | Humidity | Pressure | |
|---|---|---|---|
| High | 55 °F (Jan 8, 7:45 pm) | 100% (Jan 6, 8:45 am) | 30.35 "Hg (Jan 6, 8:45 am) |
| Low | -36 °F (Jan 8, 11:50 pm) | 46% (Jan 15, 1:45 pm) | 29.28 "Hg (Jan 8, 11:30 pm) |
| Average | 23 °F | 80% | 29.90 "Hg |
| * Reported Jan 6 8:00 am — Jan 21 7:45 am, Janesville. Weather by CustomWeather, © 2026 | |||
Note: Actual official high and low records may vary slightly from our data, if they occured in-between our weather recording intervals... More about our weather records
Janesville Weather History for the Previous 24 Hours
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| Conditions | Comfort | |||||||
|---|---|---|---|---|---|---|---|---|
| Time | Temp | Weather | Wind | Humidity | Barometer | Visibility | ||
| 7:45 am Wed, Jan 21 |  | 19 °F | Light snow. Overcast. | 6 mph | ↑ | 93% | 29.90 "Hg | 6 mi |
| 6:45 am |  | 19 °F | Overcast. | 6 mph | ↑ | 93% | 29.91 "Hg | 10 mi |
| 5:45 am |  | 19 °F | Light snow. Mostly cloudy. | 5 mph | ↑ | 93% | 29.92 "Hg | 6 mi |
| 5:15 am | | 21 °F | Overcast. | 3 mph | ↑ | 93% | 29.92 "Hg | 10 mi |
| 4:55 am | | 21 °F | Light snow. Overcast. | No wind | ↑ | 93% | 29.92 "Hg | 3 mi |
| 4:35 am | | 21 °F | Light snow. Overcast. | No wind | ↑ | 93% | 29.93 "Hg | 5 mi |
| 4:15 am | | 21 °F | Overcast. | No wind | ↑ | 93% | 29.93 "Hg | 10 mi |
| 3:55 am | | 21 °F | Overcast. | No wind | ↑ | 93% | 29.95 "Hg | 10 mi |
| 3:15 am | | 21 °F | Light snow. Mostly cloudy. | 3 mph | ↑ | 93% | 29.96 "Hg | 7 mi |
| 8:45 pm Tue, Jan 20 | | 16 °F | Overcast. | 3 mph | ↑ | 73% | 30.14 "Hg | 10 mi |
| 7:45 pm | | 16 °F | Mostly cloudy. | 5 mph | ↑ | 67% | 30.16 "Hg | 10 mi |
| 6:45 pm | | 16 °F | Overcast. | No wind | ↑ | 67% | 30.19 "Hg | 10 mi |
| 5:45 pm |  | 16 °F | Partly cloudy. | 5 mph | ↑ | 57% | 30.19 "Hg | 10 mi |
| 4:45 pm |  | 16 °F | Sunny. | 6 mph | ↑ | 57% | 30.21 "Hg | 10 mi |
| 3:45 pm | | 16 °F | Sunny. | 10 mph | ↑ | 53% | 30.23 "Hg | 10 mi |
| 2:45 pm | | 16 °F | Sunny. | 8 mph | ↑ | 53% | 30.25 "Hg | 10 mi |
| 1:45 pm | | 12 °F | Sunny. | 9 mph | ↑ | 52% | 30.27 "Hg | 10 mi |
| 12:45 pm | | 12 °F | Sunny. | 9 mph | ↑ | 52% | 30.30 "Hg | 10 mi |
| 11:45 am | | 12 °F | Sunny. | 10 mph | ↑ | 52% | 30.32 "Hg | 10 mi |
| 9:45 am | | 7 °F | Sunny. | 8 mph | ↑ | 66% | 30.34 "Hg | 10 mi |
| Weather by CustomWeather, © 2026 | ||||||||