What is the weather in Janesville right now?

Current weather in Janesville is overcast clouds.

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 · 10:29 AM

Janesville Weather & Hourly Forecast

United States · Illinois · 62440

63°F

Overcast

Feels like: 57°F

💧 Humidity 71% 🌡 Pressure 30.18 inHg 💨 Wind 12 mph 👁 Visibility 18.9 mi ☁ Clouds 99% ☀️ UV index 2.7 · Low 🌅 Sunrise 6:39 AM 🌇 Sunset 6:51 PM

Hourly Forecast for Janesville

Today

11:00 AM

Overcast

65° 💧 0.000 in 💨 12 mph H 68%30.18 inHg

2:00 PM

Overcast

70° 💧 None 💨 10 mph H 60%30.15 inHg

5:00 PM

Overcast

68° 💧 None 💨 10 mph H 61%30.15 inHg

8:00 PM

Partly cloudy night

64° 💧 None 💨 10 mph H 67%30.18 inHg

11:00 PM

Mostly cloudy night

63° 💧 None 💨 9 mph H 78%30.21 inHg

Tomorrow

2:00 AM

Overcast night

61° 💧 None 💨 8 mph H 78%30.21 inHg

5:00 AM

Overcast night

60° 💧 0.001 in 💨 7 mph H 80%30.21 inHg

8:00 AM

Overcast

61° 💧 0.001 in 💨 8 mph H 83%30.24 inHg

11:00 AM

Overcast

65° 💧 0.001 in 💨 10 mph H 74%30.27 inHg

2:00 PM

Overcast

66° 💧 None 💨 10 mph H 70%30.24 inHg

5:00 PM

Overcast

66° 💧 None 💨 11 mph H 70%30.21 inHg

8:00 PM

Overcast night

64° 💧 None 💨 9 mph H 76%30.24 inHg

11:00 PM

Overcast night

62° 💧 None 💨 7 mph H 79%30.24 inHg

Thursday

2:00 AM

Mostly cloudy night

60° 💧 None 💨 7 mph H 84%30.24 inHg

5:00 AM

Overcast night

60° 💧 0.001 in 💨 7 mph H 85%30.24 inHg

8:00 AM

Overcast

60° 💧 0.001 in 💨 7 mph H 84%30.27 inHg

Today

11:00 AM

Overcast

65° 💧 0.000 in 💨 12 mph H 68%30.18 inHg

12:00 PM

Mostly cloudy

67° 💧 None 💨 11 mph H 64%30.18 inHg

1:00 PM

Overcast

68° 💧 None 💨 10 mph H 62%30.18 inHg

2:00 PM

Overcast

70° 💧 None 💨 10 mph H 60%30.15 inHg

3:00 PM

Overcast

69° 💧 None 💨 9 mph H 61%30.15 inHg

4:00 PM

Overcast

69° 💧 None 💨 10 mph H 61%30.15 inHg

5:00 PM

Overcast

68° 💧 None 💨 10 mph H 61%30.15 inHg

6:00 PM

Overcast

67° 💧 None 💨 10 mph H 63%30.15 inHg

7:00 PM

Overcast night

66° 💧 None 💨 9 mph H 63%30.15 inHg

8:00 PM

Partly cloudy night

64° 💧 None 💨 10 mph H 67%30.18 inHg

9:00 PM

Overcast night

63° 💧 None 💨 10 mph H 71%30.21 inHg

10:00 PM

Mostly cloudy night

63° 💧 None 💨 10 mph H 76%30.21 inHg

11:00 PM

Mostly cloudy night

63° 💧 None 💨 9 mph H 78%30.21 inHg

Tomorrow

12:00 AM

Overcast night

62° 💧 None 💨 8 mph H 78%30.21 inHg

1:00 AM

Overcast night

62° 💧 None 💨 8 mph H 78%30.21 inHg

2:00 AM

Overcast night

61° 💧 None 💨 8 mph H 78%30.21 inHg

3:00 AM

Overcast night

61° 💧 None 💨 8 mph H 78%30.21 inHg

4:00 AM

Overcast night

61° 💧 None 💨 7 mph H 79%30.21 inHg

5:00 AM

Overcast night

60° 💧 None 💨 7 mph H 80%30.21 inHg

6:00 AM

Overcast night

60° 💧 0.001 in 💨 7 mph H 81%30.24 inHg

7:00 AM

Overcast

60° 💧 0.001 in 💨 7 mph H 83%30.24 inHg

8:00 AM

Overcast

61° 💧 0.001 in 💨 8 mph H 83%30.24 inHg

9:00 AM

Overcast

61° 💧 0.001 in 💨 9 mph H 81%30.27 inHg

10:00 AM

Overcast

63° 💧 None 💨 10 mph H 77%30.27 inHg

11:00 AM

Overcast

65° 💧 None 💨 10 mph H 74%30.27 inHg

12:00 PM

Overcast

65° 💧 0.001 in 💨 10 mph H 72%30.27 inHg

1:00 PM

Overcast

66° 💧 0.001 in 💨 9 mph H 71%30.27 inHg

2:00 PM

Overcast

66° 💧 None 💨 10 mph H 70%30.24 inHg

3:00 PM

Overcast

67° 💧 None 💨 10 mph H 69%30.24 inHg

4:00 PM

Overcast

67° 💧 None 💨 10 mph H 70%30.21 inHg

5:00 PM

Overcast

66° 💧 None 💨 11 mph H 70%30.21 inHg

6:00 PM

Overcast

65° 💧 None 💨 10 mph H 72%30.24 inHg

7:00 PM

Overcast night

64° 💧 None 💨 8 mph H 76%30.24 inHg

8:00 PM

Overcast night

64° 💧 None 💨 9 mph H 76%30.24 inHg

9:00 PM

Overcast night

64° 💧 None 💨 9 mph H 77%30.24 inHg

10:00 PM

Overcast night

63° 💧 None 💨 8 mph H 78%30.24 inHg

11:00 PM

Overcast night

62° 💧 None 💨 7 mph H 79%30.24 inHg

Thursday

12:00 AM

Overcast night

61° 💧 None 💨 7 mph H 81%30.24 inHg

1:00 AM

Mostly cloudy night

61° 💧 None 💨 7 mph H 82%30.24 inHg

2:00 AM

Mostly cloudy night

60° 💧 None 💨 7 mph H 84%30.24 inHg

3:00 AM

Overcast night

60° 💧 None 💨 7 mph H 85%30.24 inHg

4:00 AM

Overcast night

60° 💧 None 💨 7 mph H 85%30.24 inHg

5:00 AM

Overcast night

60° 💧 None 💨 7 mph H 85%30.24 inHg

6:00 AM

Overcast night

60° 💧 None 💨 7 mph H 86%30.24 inHg

7:00 AM

Overcast

59° 💧 0.001 in 💨 7 mph H 87%30.27 inHg

8:00 AM

Overcast

60° 💧 0.001 in 💨 7 mph H 84%30.27 inHg

9:00 AM

Overcast

62° 💧 None 💨 7 mph H 80%30.27 inHg

10:00 AM

Mostly cloudy

64° 💧 None 💨 6 mph H 75%30.27 inHg

11:00 AM

Mostly sunny

67° 💧 None 💨 6 mph H 70%30.27 inHg

12:00 PM

Partly cloudy

70° 💧 None 💨 6 mph H 65%30.24 inHg

1:00 PM

Mostly cloudy

73° 💧 None 💨 7 mph H 59%30.24 inHg

2:00 PM

Mostly cloudy

73° 💧 0.001 in 💨 7 mph H 58%30.21 inHg

3:00 PM

Overcast

74° 💧 None 💨 7 mph H 56%30.18 inHg

4:00 PM

Overcast

72° 💧 None 💨 8 mph H 60%30.18 inHg

5:00 PM

Overcast

72° 💧 None 💨 7 mph H 63%30.18 inHg

6:00 PM

Overcast

71° 💧 None 💨 7 mph H 66%30.21 inHg

7:00 PM

Overcast night

69° 💧 None 💨 7 mph H 71%30.21 inHg

Friday

4:00 AM

Overcast night

62° 💧 None 💨 7 mph H 84%30.24 inHg

7:00 AM

Overcast

60° 💧 None 💨 7 mph H 82%30.27 inHg

10:00 AM

Partly cloudy

62° 💧 None 💨 6 mph H 71%30.30 inHg

1:00 PM

Overcast

71° 💧 None 💨 6 mph H 50%30.24 inHg

4:00 PM

Partly cloudy

71° 💧 None 💨 6 mph H 43%30.21 inHg

7:00 PM

Overcast night

65° 💧 None 💨 6 mph H 58%30.21 inHg

10:00 PM

Mostly cloudy night

59° 💧 None 💨 6 mph H 66%30.21 inHg

Saturday

1:00 AM

Mostly clear night

56° 💧 None 💨 6 mph H 78%30.21 inHg

4:00 AM

Mostly clear night

53° 💧 None 💨 6 mph H 88%30.18 inHg

7:00 AM

Overcast

51° 💧 None 💨 6 mph H 92%30.21 inHg

10:00 AM

Overcast

62° 💧 None 💨 6 mph H 65%30.24 inHg

1:00 PM

Overcast

70° 💧 None 💨 4 mph H 47%30.18 inHg

4:00 PM

Overcast

72° 💧 None 💨 4 mph H 44%30.12 inHg

7:00 PM

Overcast night

66° 💧 None 💨 2 mph H 64%30.12 inHg

10:00 PM

Overcast night

62° 💧 None 💨 4 mph H 67%30.12 inHg

Sunday

1:00 AM

Overcast night

62° 💧 None 💨 5 mph H 64%30.12 inHg

4:00 AM

Overcast night

60° 💧 None 💨 2 mph H 78%30.12 inHg

7:00 AM

Overcast

58° 💧 None 💨 4 mph H 90%30.12 inHg

10:00 AM

Light rain

61° 💧 None 💨 5 mph H 80%30.12 inHg

1:00 PM

Mostly sunny

67° 💧 None 💨 6 mph H 61%30.09 inHg

4:00 PM

Overcast

70° 💧 None 💨 4 mph H 50%30.03 inHg

7:00 PM

Mostly clear night

65° 💧 None 💨 3 mph H 66%30.00 inHg

10:00 PM

Clear night

61° 💧 None 💨 3 mph H 82%30.00 inHg

Monday

1:00 AM

Mostly clear night

59° 💧 None 💨 4 mph H 83%30.00 inHg

7:00 AM

Partly cloudy

55° 💧 None 💨 4 mph H 82%30.00 inHg

1:00 PM

Sunny

51° 💧 None 💨 4 mph H 92%30.00 inHg

7:00 PM

Mostly clear night

72° 💧 None 💨 3 mph H 41%30.00 inHg

Tuesday

1:00 AM

Clear night

64° 💧 None 💨 5 mph H 57%29.94 inHg

7:00 AM

Sunny

56° 💧 None 💨 5 mph H 79%29.94 inHg

1:00 PM

Sunny

51° 💧 None 💨 5 mph H 91%30.00 inHg

7:00 PM

Clear night

74° 💧 None 💨 3 mph H 38%29.97 inHg

Wednesday

1:00 AM

Clear night

66° 💧 None 💨 4 mph H 55%29.94 inHg

7:00 AM

Sunny

59° 💧 None 💨 6 mph H 73%29.97 inHg

1:00 PM

Partly cloudy

57° 💧 None 💨 7 mph H 92%30.00 inHg

7:00 PM

Clear night

80° 💧 None 💨 8 mph H 41%30.00 inHg

Thursday

1:00 AM

Mostly cloudy night

72° 💧 None 💨 5 mph H 55%29.97 inHg

7:00 AM

Overcast

66° 💧 None 💨 9 mph H 72%30.03 inHg

1:00 PM

Overcast

63° 💧 None 💨 8 mph H 84%30.09 inHg

7:00 PM

Overcast night

83° 💧 None 💨 7 mph H 40%30.09 inHg

Friday

1:00 AM

Overcast night

76° 💧 None 💨 7 mph H 45%30.06 inHg

7:00 AM

Overcast

70° 💧 None 💨 8 mph H 54%30.09 inHg

1:00 PM

Overcast

68° 💧 None 💨 7 mph H 61%30.12 inHg

7:00 PM

Partly cloudy night

87° 💧 None 💨 7 mph H 33%30.12 inHg

Saturday

1:00 AM

Partly cloudy night

77° 💧 None 💨 5 mph H 50%30.06 inHg

7:00 AM

Mostly cloudy

72° 💧 None 💨 6 mph H 61%30.06 inHg

1:00 PM

Mostly sunny

67° 💧 None 💨 6 mph H 66%30.09 inHg

7:00 PM

Mostly clear night

85° 💧 None 💨 11 mph H 40%30.06 inHg

Sunday

1:00 AM

Overcast night

76° 💧 None 💨 7 mph H 58%30.00 inHg

7:00 AM

Light rain

68° 💧 None 💨 11 mph H 87%29.97 inHg

1:00 PM

Light rain

66° 💧 None 💨 7 mph H 97%29.94 inHg

7:00 PM

Light rain

72° 💧 None 💨 6 mph H 93%29.94 inHg

Monday

1:00 AM

Moderate rain

70° 💧 None 💨 4 mph H 96%29.94 inHg

7:00 AM

Overcast

66° 💧 None 💨 10 mph H 93%30.03 inHg

1:00 PM

Overcast

62° 💧 None 💨 12 mph H 69%30.12 inHg

7:00 PM

Mostly clear night

68° 💧 None 💨 11 mph H 45%30.15 inHg

Tuesday

1:00 AM

Mostly cloudy night

62° 💧 None 💨 8 mph H 53%30.12 inHg

7:00 AM

Partly cloudy

57° 💧 None 💨 6 mph H 68%30.09 inHg

1:00 PM

Overcast

54° 💧 None 💨 7 mph H 92%30.06 inHg

7:00 PM

Mostly clear night

64° 💧 None 💨 8 mph H 69%30.03 inHg

Wednesday

1:00 AM

Clear night

60° 💧 None 💨 6 mph H 63%30.03 inHg

In Janesville and, more broadly, across the state of Illinois: This morning begins with mostly cloudy skies and mild temperatures ranging from 60 to 69 degrees Fahrenheit. Winds will be coming from the northeast at around 11 mph, with gusts reaching up to 21 mph. As the day progresses into the afternoon, the cloud cover is expected to persist, but no precipitation is anticipated. Temperatures are likely to remain steady within the mild range, providing comfortable conditions for outdoor activities. Winds will continue from the northeast, maintaining a moderate breeze throughout the day. Overall, it will be a relatively calm day with partly cloudy skies and no significant weather disruptions.

15-Day Weather Outlook for Janesville

TomorrowTomorrow

Overcast 67°/60° 💧 None 💨 11 mph

Thursday, Sep 24Thu Sep 24

Overcast 74°/59° 💧 None 💨 8 mph

Friday, Sep 25Fri Sep 25

Overcast 71°/59° 💧 0.012 in 💨 7 mph

Saturday, Sep 26Sat Sep 26

Mostly sunny 72°/51° 💧 None 💨 6 mph

Sunday, Sep 27Sun Sep 27

Light rain 70°/58° 💧 0.073 in 💨 6 mph

Monday, Sep 28Mon Sep 28

Mostly sunny 72°/51° 💧 None 💨 4 mph

Tuesday, Sep 29Tue Sep 29

Sunny 74°/51° 💧 None 💨 5 mph

Wednesday, Sep 30Wed Sep 30

Partly cloudy 80°/57° 💧 None 💨 8 mph

Thursday, Oct 1Thu Oct 1

Mostly cloudy 83°/63° 💧 None 💨 9 mph

Friday, Oct 2Fri Oct 2

Overcast 87°/68° 💧 None 💨 8 mph

Saturday, Oct 3Sat Oct 3

Partly cloudy 85°/67° 💧 None 💨 11 mph

Sunday, Oct 4Sun Oct 4

Light rain 76°/66° 💧 0.496 in 💨 11 mph

Monday, Oct 5Mon Oct 5

Moderate rain 70°/62° 💧 0.172 in 💨 12 mph

Tuesday, Oct 6Tue Oct 6

Overcast 64°/54° 💧 0.183 in 💨 8 mph

Wednesday, Oct 7Wed Oct 7

Sunny 60°/60° 💧 None 💨 6 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 11:00 AM

PM2.5 Fine particles Good 3,0µg/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 3,5µg/m³

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

O₃ Ozone Good 56,0µg/m³

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

NO₂ Nitrogen dioxide Good 2,7µg/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 5,8Moderate 😊Good

Tomorrow UV 4,2Moderate 🙂Fair

Thursday UV 3,7Moderate 🙂Fair

Friday UV 6,1High 🙂Fair

Saturday UV 4,0Moderate 🙂Fair

Sunday UV 5,0Moderate —Unavailable

Monday UV 6,0High —Unavailable

Hourly UV index today

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

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, ILLINOIS

Tonight's Stargazing & Shooting Stars

Good observing conditions. Best local viewing window: 8:00 PM–9:00 PM.

65/100Best-hour score

BEST TIME TONIGHT 8:00 PM–9:00 PM Astronomical darkness: 8:20 PM–5:12 AM

☁ Cloud cover 39% Real hourly forecast for the best viewing hour.

☾ Moonlight 86% Waxing Gibbous · Moon about 27° above the horizon at the best viewing hour.

☄ Meteor activity Southern Taurids Reference ZHR 7 · Radiant -14° 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.

DISCOVER WEATHER NEARBY Weather in other cities

Explore current conditions and forecasts for other locations.

Winston-Salem US · North Carolina · 252,037 residents Lake Fenton US · Michigan · 6,417 residents Murraysville US · North Carolina · 16,339 residents Stretham GB · England · 2,070 residents Brazil US · Indiana · 7,831 residents Yuba City US · California · 69,471 residents Jamestown US · New York · 28,188 residents L'Anse-au-Clair CA · Newfoundland and Labrador · 219 residents Quincy US · Massachusetts · 102,114 residents Ashton-in-Makerfield GB · England · 26,375 residents Dothan US · Alabama · 71,514 residents Litchfield Beach US · South Carolina · 9,044 residents Belle Mead US · New Jersey · 6,394 residents Stevensville US · Maryland · 8,802 residents Park Orchards AU · Victoria · 3,835 residents Citrus Heights US · California · 86,995 residents

Forecast data for Janesville were last refreshed today at 10:29 AM. The current forecast period extends through 24/09/2026 at 8:00 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.