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 Janesville Weather Forecast Summary |
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Today
Jun 18th
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Friday
Jun 19th
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Saturday
Jun 20th
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Sunday
Jun 21st
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Monday
Jun 22nd
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Mostly Sunny |
Mostly Sunny |
Mostly Sunny |
Mostly Sunny |
Mostly Sunny |
70°F
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68°F
50°F |
72°F
55°F |
68°F
55°F |
72°F
50°F |
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| Janesville Detailed Weather Forecast |
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| Thursday, June 18th, 2026 |
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Overnight |
Temperature: 56°F |
| Clear. Windy at times. |
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Morning |
Temperature: 58°F |
| A mix of sun and cloud. Windy at times. |
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Afternoon |
Temperature: 69°F |
| Sunny with cloudy periods. Slight chance of a thunderstorm. Windy at times. |
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Evening |
Temperature: 63°F |
| A mix of cloudy and clear skies. Slight chance of a thunderstorm. |
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| Friday, June 19th, 2026 |
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Overnight |
Temperature: 54°F |
| Clear. |
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Morning |
Temperature: 57°F |
| Sunny with cloudy periods. |
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Afternoon |
Temperature: 67°F |
| Cloudy with sunny periods. Windy. |
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Evening |
Temperature: 61°F |
| Mostly clear. Windy at times. |
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| Saturday, June 20th, 2026 |
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Overnight |
Temperature: 55°F |
| Mostly clear. |
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Morning |
Temperature: 62°F |
| Mostly sunny. |
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Afternoon |
Temperature: 72°F |
| A mix of sun and cloud. |
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Evening |
Temperature: 65°F |
| A mix of cloudy and clear skies. |
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| Sunday, June 21st, 2026 |
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Overnight |
Temperature: 58°F |
| A mix of cloudy and clear skies. Windy at times. |
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Morning |
Temperature: 58°F |
| Sunny. Windy at times. |
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Afternoon |
Temperature: 67°F |
| Sunny. Windy at times. |
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Evening |
Temperature: 60°F |
| Clear. |
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| Monday, June 22nd, 2026 |
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Overnight |
Temperature: 52°F |
| Mostly clear. |
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Morning |
Temperature: 58°F |
| Sunny. |
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Afternoon |
Temperature: 71°F |
| Mostly sunny. |
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Evening |
Temperature: 65°F |
| Mostly clear. |
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| Tuesday, June 23rd, 2026 |
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Overnight |
Temperature: 59°F |
| A mix of cloudy and clear skies. |
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Morning |
Temperature: 60°F |
| Cloudy with a chance of showers. |
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Afternoon |
Temperature: 63°F |
| A mix of cloud and sun with a chance of showers. |
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Evening |
Temperature: 63°F |
| Clear with cloudy periods with a slight chance of showers. |
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| Wednesday, June 24th, 2026 |
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Overnight |
Temperature: 56°F |
| Clear. |
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Morning |
Temperature: 61°F |
| Sunny with cloudy periods. |
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Afternoon |
Temperature: 75°F |
| Sunny with cloudy periods with a slight chance of showers. |
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Evening |
Temperature: 69°F |
| Clear with a slight chance of showers or thundershowers. |
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| Thursday, June 25th, 2026 |
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Overnight |
Temperature: 63°F |
| Mostly clear. |
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Morning |
Temperature: 69°F |
| Mostly sunny. Slight chance of a thunderstorm. Windy. |
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Afternoon |
Temperature: 76°F |
| A mix of cloud and sun with a chance of showers or thundershowers. Windy. |
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Evening |
Temperature: 73°F |
| Clear with cloudy periods with a chance of showers or thundershowers. Windy. |
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