What is the weather in Janesville right now?

Current weather in Janesville is clear sky.

Where can I find the hourly weather forecast for Janesville?

This page shows hourly weather forecast for Janesville, including temperature, wind, precipitation, humidity and cloud cover.

Is the weather forecast for Janesville updated regularly?

Weather data for Janesville is updated regularly with the latest available observations and forecasts.

Now · 6:15 AM

Janesville Weather & Hourly Forecast

United States · Iowa · 50647

48°F

Clear night

Feels like: 44°F

💧 Humidity 92% 🌡 Pressure 30.39 inHg 💨 Wind 6 mph 👁 Visibility 17.7 mi ☁ Clouds 0% ☀️ UV index 0.0 · Low 🌅 Sunrise 6:57 AM 🌇 Sunset 7:07 PM

Hourly Forecast for Janesville

Today

7:00 AM

Sunny

48° 💧 None 💨 4 mph H 93%30.39 inHg

10:00 AM

Sunny

57° 💧 None 💨 7 mph H 79%30.42 inHg

1:00 PM

Overcast

65° 💧 0.000 in 💨 7 mph H 62%30.39 inHg

4:00 PM

Mostly cloudy

67° 💧 0.001 in 💨 7 mph H 56%30.33 inHg

7:00 PM

Partly cloudy

61° 💧 None 💨 5 mph H 74%30.33 inHg

10:00 PM

Clear night

56° 💧 None 💨 5 mph H 88%30.36 inHg

Tomorrow

1:00 AM

Mostly cloudy night

54° 💧 None 💨 7 mph H 92%30.33 inHg

4:00 AM

Partly cloudy night

52° 💧 None 💨 5 mph H 95%30.33 inHg

7:00 AM

Overcast

53° 💧 None 💨 3 mph H 96%30.36 inHg

10:00 AM

Overcast

60° 💧 None 💨 5 mph H 84%30.36 inHg

1:00 PM

Overcast

64° 💧 0.002 in 💨 7 mph H 74%30.30 inHg

4:00 PM

Overcast

64° 💧 0.001 in 💨 7 mph H 72%30.27 inHg

7:00 PM

Overcast

62° 💧 None 💨 7 mph H 77%30.27 inHg

10:00 PM

Overcast night

60° 💧 0.001 in 💨 5 mph H 81%30.27 inHg

Friday

1:00 AM

Overcast night

59° 💧 None 💨 4 mph H 85%30.24 inHg

4:00 AM

Overcast night

59° 💧 None 💨 3 mph H 90%30.24 inHg

Today

7:00 AM

Sunny

48° 💧 None 💨 4 mph H 93%30.39 inHg

8:00 AM

Sunny

50° 💧 None 💨 6 mph H 90%30.42 inHg

9:00 AM

Sunny

53° 💧 None 💨 6 mph H 84%30.42 inHg

10:00 AM

Sunny

57° 💧 None 💨 7 mph H 79%30.42 inHg

11:00 AM

Sunny

61° 💧 None 💨 7 mph H 73%30.39 inHg

12:00 PM

Partly cloudy

64° 💧 None 💨 8 mph H 64%30.39 inHg

1:00 PM

Overcast

65° 💧 0.000 in 💨 7 mph H 62%30.39 inHg

2:00 PM

Mostly cloudy

66° 💧 None 💨 7 mph H 59%30.36 inHg

3:00 PM

Mostly cloudy

67° 💧 None 💨 7 mph H 56%30.33 inHg

4:00 PM

Mostly cloudy

67° 💧 0.001 in 💨 7 mph H 56%30.33 inHg

5:00 PM

Mostly cloudy

67° 💧 None 💨 7 mph H 56%30.33 inHg

6:00 PM

Partly cloudy

65° 💧 None 💨 5 mph H 64%30.30 inHg

7:00 PM

Partly cloudy

61° 💧 None 💨 5 mph H 74%30.33 inHg

8:00 PM

Clear night

60° 💧 None 💨 7 mph H 78%30.33 inHg

9:00 PM

Clear night

58° 💧 None 💨 6 mph H 84%30.33 inHg

10:00 PM

Clear night

56° 💧 None 💨 5 mph H 88%30.36 inHg

11:00 PM

Mostly clear night

55° 💧 None 💨 6 mph H 90%30.36 inHg

Tomorrow

12:00 AM

Partly cloudy night

55° 💧 None 💨 7 mph H 91%30.36 inHg

1:00 AM

Mostly cloudy night

54° 💧 None 💨 7 mph H 92%30.33 inHg

2:00 AM

Partly cloudy night

54° 💧 None 💨 5 mph H 93%30.33 inHg

3:00 AM

Partly cloudy night

53° 💧 None 💨 5 mph H 94%30.33 inHg

4:00 AM

Partly cloudy night

52° 💧 None 💨 5 mph H 95%30.33 inHg

5:00 AM

Mostly cloudy night

52° 💧 None 💨 5 mph H 96%30.33 inHg

6:00 AM

Overcast night

52° 💧 None 💨 4 mph H 96%30.33 inHg

7:00 AM

Overcast

53° 💧 None 💨 3 mph H 96%30.36 inHg

8:00 AM

Overcast

55° 💧 None 💨 6 mph H 93%30.33 inHg

9:00 AM

Overcast

58° 💧 None 💨 4 mph H 89%30.36 inHg

10:00 AM

Overcast

60° 💧 None 💨 5 mph H 84%30.36 inHg

11:00 AM

Overcast

61° 💧 None 💨 5 mph H 82%30.33 inHg

12:00 PM

Overcast

63° 💧 None 💨 5 mph H 79%30.33 inHg

1:00 PM

Overcast

64° 💧 0.001 in 💨 7 mph H 74%30.30 inHg

2:00 PM

Overcast

64° 💧 0.001 in 💨 7 mph H 74%30.30 inHg

3:00 PM

Overcast

65° 💧 0.001 in 💨 7 mph H 72%30.27 inHg

4:00 PM

Overcast

64° 💧 None 💨 7 mph H 72%30.27 inHg

5:00 PM

Overcast

64° 💧 0.001 in 💨 6 mph H 73%30.27 inHg

6:00 PM

Overcast

63° 💧 None 💨 5 mph H 77%30.27 inHg

7:00 PM

Overcast

62° 💧 None 💨 7 mph H 77%30.27 inHg

8:00 PM

Overcast night

61° 💧 None 💨 7 mph H 77%30.27 inHg

9:00 PM

Overcast night

60° 💧 None 💨 6 mph H 79%30.27 inHg

10:00 PM

Overcast night

60° 💧 0.001 in 💨 5 mph H 81%30.27 inHg

11:00 PM

Overcast night

59° 💧 None 💨 4 mph H 83%30.27 inHg

Friday

12:00 AM

Overcast night

59° 💧 None 💨 5 mph H 84%30.24 inHg

1:00 AM

Overcast night

59° 💧 None 💨 4 mph H 85%30.24 inHg

2:00 AM

Overcast night

59° 💧 None 💨 3 mph H 88%30.27 inHg

3:00 AM

Overcast night

59° 💧 None 💨 3 mph H 89%30.27 inHg

4:00 AM

Overcast night

59° 💧 None 💨 3 mph H 90%30.24 inHg

5:00 AM

Overcast night

59° 💧 None 💨 4 mph H 91%30.24 inHg

6:00 AM

Overcast night

59° 💧 None 💨 5 mph H 92%30.24 inHg

7:00 AM

Overcast

59° 💧 None 💨 6 mph H 92%30.27 inHg

8:00 AM

Overcast

59° 💧 None 💨 6 mph H 91%30.27 inHg

9:00 AM

Overcast

61° 💧 None 💨 5 mph H 87%30.27 inHg

10:00 AM

Overcast

63° 💧 0.001 in 💨 6 mph H 83%30.27 inHg

11:00 AM

Overcast

65° 💧 None 💨 6 mph H 79%30.27 inHg

12:00 PM

Overcast

67° 💧 None 💨 7 mph H 73%30.27 inHg

1:00 PM

Overcast

69° 💧 0.001 in 💨 8 mph H 70%30.24 inHg

2:00 PM

Overcast

69° 💧 0.002 in 💨 9 mph H 69%30.24 inHg

3:00 PM

Overcast

70° 💧 0.001 in 💨 8 mph H 67%30.21 inHg

4:00 PM

Overcast

69° 💧 None 💨 8 mph H 66%30.18 inHg

5:00 PM

Overcast

68° 💧 None 💨 8 mph H 70%30.18 inHg

6:00 PM

Overcast

68° 💧 None 💨 7 mph H 74%30.18 inHg

7:00 PM

Overcast

66° 💧 None 💨 7 mph H 78%30.18 inHg

10:00 PM

Overcast night

63° 💧 None 💨 8 mph H 85%30.18 inHg

Saturday

1:00 AM

Overcast night

60° 💧 None 💨 9 mph H 87%30.18 inHg

4:00 AM

Overcast night

58° 💧 None 💨 9 mph H 87%30.15 inHg

7:00 AM

Overcast night

55° 💧 None 💨 9 mph H 81%30.18 inHg

10:00 AM

Overcast

57° 💧 None 💨 10 mph H 74%30.18 inHg

1:00 PM

Overcast

60° 💧 None 💨 12 mph H 70%30.12 inHg

4:00 PM

Overcast

59° 💧 None 💨 11 mph H 84%30.09 inHg

7:00 PM

Overcast

58° 💧 None 💨 12 mph H 76%30.06 inHg

10:00 PM

Overcast night

57° 💧 None 💨 9 mph H 79%30.09 inHg

Sunday

1:00 AM

Overcast night

57° 💧 None 💨 9 mph H 79%30.09 inHg

4:00 AM

Overcast night

58° 💧 None 💨 8 mph H 83%30.06 inHg

7:00 AM

Partly cloudy night

56° 💧 None 💨 7 mph H 86%30.09 inHg

10:00 AM

Mostly cloudy

62° 💧 None 💨 6 mph H 72%30.09 inHg

1:00 PM

Overcast

66° 💧 None 💨 4 mph H 70%30.09 inHg

4:00 PM

Partly cloudy

68° 💧 None 💨 5 mph H 70%30.06 inHg

7:00 PM

Mostly clear night

63° 💧 None 💨 3 mph H 85%30.03 inHg

10:00 PM

Overcast night

62° 💧 None 💨 3 mph H 83%30.06 inHg

Monday

1:00 AM

Partly cloudy night

61° 💧 None 💨 3 mph H 85%30.03 inHg

4:00 AM

Clear night

56° 💧 None 💨 3 mph H 92%30.03 inHg

7:00 AM

Partly cloudy night

54° 💧 None 💨 2 mph H 94%30.00 inHg

10:00 AM

Partly cloudy

64° 💧 None 💨 4 mph H 77%30.00 inHg

1:00 PM

Overcast

70° 💧 None 💨 7 mph H 62%29.94 inHg

4:00 PM

Overcast

71° 💧 None 💨 7 mph H 62%29.88 inHg

7:00 PM

Mostly cloudy night

66° 💧 None 💨 5 mph H 79%29.85 inHg

Tuesday

1:00 AM

Partly cloudy night

63° 💧 None 💨 7 mph H 81%29.83 inHg

7:00 AM

Overcast night

61° 💧 None 💨 6 mph H 80%29.77 inHg

1:00 PM

Moderate rain

62° 💧 None 💨 6 mph H 90%29.74 inHg

7:00 PM

Overcast night

62° 💧 None 💨 8 mph H 91%29.71 inHg

Wednesday

1:00 AM

Overcast night

59° 💧 None 💨 13 mph H 88%29.71 inHg

7:00 AM

Partly cloudy night

53° 💧 None 💨 13 mph H 83%29.74 inHg

1:00 PM

Overcast

62° 💧 None 💨 11 mph H 65%29.80 inHg

7:00 PM

Mostly clear night

57° 💧 None 💨 5 mph H 72%29.80 inHg

Thursday

1:00 AM

Overcast night

53° 💧 None 💨 5 mph H 80%29.83 inHg

7:00 AM

Mostly cloudy night

48° 💧 None 💨 7 mph H 92%29.85 inHg

1:00 PM

Overcast

56° 💧 None 💨 12 mph H 70%29.88 inHg

7:00 PM

Overcast night

53° 💧 None 💨 8 mph H 67%29.91 inHg

Friday

1:00 AM

Mostly clear night

49° 💧 None 💨 6 mph H 86%30.00 inHg

7:00 AM

Overcast night

49° 💧 None 💨 6 mph H 93%30.06 inHg

1:00 PM

Partly cloudy

60° 💧 None 💨 11 mph H 48%30.09 inHg

7:00 PM

Mostly cloudy night

56° 💧 None 💨 5 mph H 57%30.06 inHg

Saturday

1:00 AM

Overcast night

50° 💧 None 💨 3 mph H 79%30.12 inHg

7:00 AM

Overcast night

51° 💧 None 💨 3 mph H 78%30.18 inHg

1:00 PM

Overcast

62° 💧 None 💨 6 mph H 49%30.18 inHg

7:00 PM

Clear night

56° 💧 None 💨 4 mph H 71%30.12 inHg

Sunday

1:00 AM

Mostly clear night

49° 💧 None 💨 5 mph H 89%30.15 inHg

7:00 AM

Clear night

48° 💧 None 💨 6 mph H 94%30.18 inHg

1:00 PM

Overcast

66° 💧 None 💨 11 mph H 65%30.09 inHg

7:00 PM

Mostly cloudy night

61° 💧 None 💨 4 mph H 86%30.03 inHg

Monday

1:00 AM

Partly cloudy night

56° 💧 None 💨 4 mph H 96%30.03 inHg

7:00 AM

Overcast night

54° 💧 None 💨 3 mph H 98%30.00 inHg

1:00 PM

Mostly sunny

73° 💧 None 💨 8 mph H 69%29.97 inHg

7:00 PM

Mostly clear night

70° 💧 None 💨 8 mph H 82%29.88 inHg

Tuesday

1:00 AM

Clear night

65° 💧 None 💨 8 mph H 95%29.88 inHg

7:00 AM

Clear night

58° 💧 None 💨 13 mph H 78%30.00 inHg

1:00 PM

Sunny

63° 💧 None 💨 13 mph H 43%30.09 inHg

7:00 PM

Clear night

58° 💧 None 💨 11 mph H 51%30.09 inHg

Wednesday

1:00 AM

Clear night

50° 💧 None 💨 10 mph H 56%30.18 inHg

7:00 AM

Clear night

45° 💧 None 💨 9 mph H 67%30.24 inHg

1:00 PM

Mostly sunny

56° 💧 None 💨 17 mph H 41%30.21 inHg

7:00 PM

Clear night

51° 💧 None 💨 9 mph H 49%30.18 inHg

In Janesville and, more broadly, across the state of Iowa: This morning will start with mostly cloudy skies and cool temperatures ranging from 56 to 58 degrees Fahrenheit. Expect moderate northeast winds at around 11 mph, with gusts reaching up to 20 mph. There is a high likelihood of rain, with possible accumulation totaling around half an inch. As the day progresses into the afternoon, the clouds will remain, and temperatures will stay within the same cool range. The wind will continue to blow from the northeast, maintaining similar speeds and gusts. Overall, the weather remains unsettled, making it a good idea to carry an umbrella if you're heading outdoors. Conditions will stay relatively cool and breezy throughout the day, with rain chances persisting into the afternoon hours.

15-Day Weather Outlook for Janesville

TomorrowTomorrow

Partly cloudy 65°/52° 💧 None 💨 7 mph

Friday, Sep 25Fri Sep 25

Overcast 70°/59° 💧 0.019 in 💨 9 mph

Saturday, Sep 26Sat Sep 26

Overcast 60°/55° 💧 0.082 in 💨 12 mph

Sunday, Sep 27Sun Sep 27

Mostly cloudy 68°/56° 💧 None 💨 9 mph

Monday, Sep 28Mon Sep 28

Partly cloudy 71°/54° 💧 None 💨 7 mph

Tuesday, Sep 29Tue Sep 29

Moderate rain 63°/61° 💧 0.362 in 💨 8 mph

Wednesday, Sep 30Wed Sep 30

Overcast 62°/53° 💧 0.004 in 💨 13 mph

Thursday, Oct 1Thu Oct 1

Overcast 56°/48° 💧 0.029 in 💨 12 mph

Friday, Oct 2Fri Oct 2

Overcast 60°/49° 💧 0.001 in 💨 11 mph

Saturday, Oct 3Sat Oct 3

Overcast 62°/50° 💧 None 💨 6 mph

Sunday, Oct 4Sun Oct 4

Mostly cloudy 66°/48° 💧 0.012 in 💨 11 mph

Monday, Oct 5Mon Oct 5

Partly cloudy 73°/54° 💧 None 💨 8 mph

Tuesday, Oct 6Tue Oct 6

Sunny 65°/58° 💧 None 💨 13 mph

Wednesday, Oct 7Wed Oct 7

Mostly sunny 56°/45° 💧 None 💨 17 mph

TEMPERATURE OUTLOOK

Temperature & Weather Trends in Janesville

Vertical axis: °F · Color based on temperature

AIR QUALITY FORECAST

Air Quality Forecast for Janesville

Hourly forecast · Updated every 2 hours

Good

Nearest forecast value 7:00 AM

PM2.5 Fine particles Good 2,0µg/m³

Microscopic particles that can penetrate deep into the lungs. Elevated concentrations can especially affect children, older adults and people with respiratory conditions.

PM10 Particulate matter Good 2,4µg/m³

Includes dust, pollen and other airborne particles. High concentrations may irritate the respiratory system.

O₃ Ozone Good 42,3µg/m³

Ground-level ozone can irritate the eyes and respiratory system when concentrations are elevated.

NO₂ Nitrogen dioxide Good 3,6µg/m³

A gas emitted mainly by traffic and some industrial activity. High exposure can affect respiratory health.

Air quality is favorable for outdoor activities.

UV & HEALTH

UV, Sun & Health Outlook in Janesville

Maximum daily UV Today, tomorrow and the following day show the maximum UV index forecast for each day.

0–2 Low 3–5 Moderate 6–7 High 8–10 Very high 11+ Extreme

Today UV 5,6Moderate 😊Good

Tomorrow UV 1,2Low 🙂Fair

Friday UV 1,2Low 🙂Fair

Saturday UV 0,6Low 🙂Fair

Sunday UV 4,0Moderate 🙂Fair

Monday UV 4,0Moderate —Unavailable

Tuesday UV 4,0Moderate —Unavailable

Hourly UV index today

7:00 AMUV 0,0 8:00 AMUV 0,2 9:00 AMUV 0,9 10:00 AMUV 2,1 11:00 AMUV 3,6 12:00 PMUV 4,9 1:00 PMUV 5,6 2:00 PMUV 5,2 3:00 PMUV 4,0 4:00 PMUV 1,5 5:00 PMUV 0,7 6:00 PMUV 0,3

Today's weather health advice Open today's recommendations.

Moderate UV risk

Sunglasses and sun protection are recommended for prolonged exposure.

Good air quality

Air quality is good and outdoor activities can be enjoyed normally.

Comfortable temperature conditions

Temperatures should feel comfortable for most people, with no particular heat or cold precautions needed.

Good conditions for outdoor activities

Outdoor activities can generally be enjoyed normally, with sun protection adjusted to the UV level.

WIND OUTLOOK

Hourly Wind Forecast for Janesville

Vertical axis: mph · Horizontal axis: hours

Sustained wind Max gusts

NIGHT SKY · JANESVILLE, IOWA

Tonight's Stargazing & Shooting Stars

Excellent observing conditions. Best local viewing window: 9:00 PM–10:00 PM.

87/100Best-hour score

BEST TIME TONIGHT 9:00 PM–10:00 PM Astronomical darkness: 8:40 PM–5:25 AM

☁ Cloud cover 7% Real hourly forecast for the best viewing hour.

☾ Moonlight 93% Waxing Gibbous · Moon about 29° above the horizon at the best viewing hour.

☄ Meteor activity Southern Taurids Reference ZHR 7 · Radiant -5° high at the best hour.

✦ Estimated visible meteors 0–1/hour Local estimate after weather, moonlight and radiant-height adjustments.

Chance ≥1 meteor in 30 min5%

UPCOMING METEOR PERIODSStart, peak and end dates · weather should be checked closer to the peak.

SEP 20–NOV 20

Southern TauridsStart SEP 20 · Peak NOV 5 · End NOV 20 · ZHR 7 · 20% Moon at peak

ACTIVE NOW

OCT 2–NOV 7

OrionidsStart OCT 2 · Peak OCT 21 · End NOV 7 · ZHR 20 · 77% Moon at peak

UPCOMING

OCT 20–DEC 10

Northern TauridsStart OCT 20 · Peak NOV 12 · End DEC 10 · ZHR 5 · 7% Moon at peak

UPCOMING

NOV 6–NOV 30

LeonidsStart NOV 6 · Peak NOV 17 · End NOV 30 · ZHR 15 · 52% Moon at peak

UPCOMING

Experimental local observing estimate. Weather values come from the hourly forecast already used on this page. Moon position and astronomical darkness are calculated locally from time and coordinates. Meteor-shower ZHR describes ideal conditions and is not the number of meteors a person should expect to see locally.

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Forecast data for Janesville were last refreshed today at 6:15 AM. The current forecast period extends through 25/09/2026 at 4:00 AM. Weather, air-quality and UV-index data are provided through WEATHER-INFO.COM. Forecasts are produced automatically from the latest available data and are subject to periodic technical checks. This service is intended for general weather information.