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Weather in Janesville, United States 🇺🇸

Current Weather in Janesville

Patchy rain nearby
23°C
Feels like 21°C. Patchy rain nearby.
🌬️ 16 km/h NW
💧 64% Humidity
🧭 1018 hPa
👁️ 10.0 km Visibility
☀️ UV Index: 0.0
🌡️ Dew Point: 15°C
🌅 Sunrise: 06:28 AM
🌇 Sunset: 07:19 PM
Map Overlays:

Janesville currently sits at 23°C, patchy rain nearby, feeling like 21°C. The air is at 64% humidity and winds are about 16 km/h, and the UV index is 0 (low). In the days ahead, expect temperatures in Janesville from about 15°C to 32°C.

Hourly Forecast for Janesville

00:00
Light rain
22°
73%
01:00
Light rain
22°
77%
02:00
Light rain
22°
80%
03:00
Moderate rain
22°
85%
04:00
Moderate rain
21°
88%
05:00
Light rain shower
21°
83%
06:00
Light rain shower
20°
83%
07:00
Light rain shower
20°
68%
08:00
Mist
19°
37%
09:00
Light rain shower
20°
52%
10:00
Light rain shower
20°
66%
11:00
Mist
19°
38%
12:00
Light rain shower
21°
59%
13:00
Light rain shower
23°
52%
14:00
Patchy rain nearby
25°
22%
15:00
Patchy rain nearby
26°
22%
16:00
Patchy rain nearby
26°
9%
17:00
Overcast
26°
13%
18:00
Overcast
26°
16%
19:00
Patchy rain nearby
24°
33%
20:00
Patchy rain nearby
23°
42%
21:00
Cloudy
22°
19%
22:00
Cloudy
21°
20%
23:00
Overcast
20°
20%

14-Day Forecast for Janesville

Tue, Sep 08
Patchy rain nearby Patchy rain nearby
32° / 16°
Wed, Sep 09
Light rain shower Light rain shower
26° / 19°
Thu, Sep 10
Sunny Sunny
23° / 15°
Fri, Sep 11
Sunny Sunny
26° / 14°
Sat, Sep 12
Overcast Overcast
26° / 17°
Sun, Sep 13
Overcast Overcast
25° / 19°
Mon, Sep 14
Light rain shower Light rain shower
29° / 20°
Tue, Sep 15
Overcast Overcast
21° / 15°
Wed, Sep 16
Overcast Overcast
21° / 13°
Thu, Sep 17
Sunny Sunny
30° / 18°
Fri, Sep 18
Light rain shower Light rain shower
26° / 13°
Sat, Sep 19
Overcast Overcast
14° /
Sun, Sep 20
Sunny Sunny
15° /
Mon, Sep 21
Sunny Sunny
18° /

Additional Forecasts for Janesville

Air Quality

💨 US EPA Index 1 (Good)
CO (Carbon Monoxide) 162.0 μg/m³
O₃ (Ozone) 80.0 μg/m³
NO₂ (Nitrogen Dioxide) 7.2 μg/m³
SO₂ (Sulphur Dioxide) 2.2 μg/m³
PM2.5 (Fine particles) 3.3 μg/m³
PM10 (Coarse particles) 3.4 μg/m³

Historical Weather

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Best Time to Be Outside in Janesville Today

The most comfortable window in Janesville today looks like 15:00 to 18:00, when it is around 26°C. It should stay dry through that window. The next likely rain is around 00:00.

Frequently Asked Questions about Weather in Janesville

What is the temperature in Janesville right now?

It is currently 23°C (73°F) in Janesville, patchy rain nearby (feels like 21°C).

What's the weather like in Janesville right now?

Current weather in Janesville: Patchy rain nearby, humidity 64%, wind 16 km/h NW.

What is today's forecast for Janesville?

Today in Janesville: high 32°C, low 16°C, patchy rain nearby. Chance of rain: 24%.

What is the 7-day weather forecast for Janesville?

Daily highs and lows for Janesville:

  • 2026-09-08: 32°C / 16°C
  • 2026-09-09: 26°C / 19°C
  • 2026-09-10: 23°C / 15°C
  • 2026-09-11: 26°C / 14°C
  • 2026-09-12: 26°C / 17°C
  • 2026-09-13: 25°C / 19°C
  • 2026-09-14: 29°C / 20°C
Is it going to rain in Janesville today?

There is a 24% chance of rain in Janesville today. Total expected precipitation: 0.15 mm.

What is the wind speed in Janesville right now?

Wind in Janesville is currently 16 km/h (10 mph) from the NW.

What is the UV index in Janesville right now?

The UV index in Janesville is currently 0 (low). Sun protection is recommended when the index is 3 or higher.

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