Janesville, Illinois 7 Day & Night Forecast & Conditions

Current Conditions

Maps Alerts Climate Index

Partly Cloudy 77°F 25°C Heat Index: 77°F	Observed at: Janesville, IL	Elevation: 659 ft | 201 m
	Last Updated: July 16, 10:30 PM Timezone: GMT -5/-4
	Sky Conditions: Partly Cloudy	Temperature: 77°F | 25°C
	Pressure: 29.3 in | 992.3 mb	Dewpoint: 74°F | 23°C
	Humidity: 91%	Wind: WSW 2 mph | WSW 3 kph
	Feels Like: 87°F | 31°C	Visibility: 27.7 mi | 44.6 km
	Lat/Long: 39.3742 | -88.2436	Sunrise: 5:39 AM   Sunset: 8:18 PM

7 Day Graphical Forecast

Valid: 10:39 PM 7/16/2026

Tonight Overcast 72 °F 26% Chance Precipitation Friday Overcast 87 |72 °F 26% Chance Precipitation Saturday Light Showers 91 |73 °F 42% Chance Precipitation Sunday Showers 82 |68 °F 32% Chance Precipitation Monday Light Drizzle 85 |67 °F 8% Chance Precipitation Tuesday Light Drizzle 90 |66 °F 10% Chance Precipitation Wednesday Overcast 71 |56 °F 4% Chance Precipitation

7 Hour Graphical Forecast

Valid: 10:39 PM 7/16/2026

10 PM Overcast 78 °F 2% Chance Precipitation

11 PM Mostly Clear 77 °F 3% Chance Precipitation

12 AM Clear 76 °F 3% Chance Precipitation

1 AM Overcast 75 °F 4% Chance Precipitation

2 AM Partly Cloudy 75 °F 3% Chance Precipitation

3 AM Clear 74 °F 3% Chance Precipitation

4 AM Clear 73 °F 4% Chance Precipitation

7 Day Textual Forecast - with QPF, Max Wind, Humidity, Snowfall & UV Index

7 Day & Night Weather Forecast for Janesville, IL - (Fahrenheit & Celsius) Valid: 10:39 PM 7/16/2026 Tonight Overcast with a low around 72°F [22°C]. S wind to around 15 mph [24 kph], with gusts to near 18 mph [29 kph]. Chance of precipitation 26% with QPF of 0.00 in [0.0 mm]. Friday Overcast with a high near 87°F [31°C]. WSW wind to around 9 mph [14 kph], with gusts to near 16 mph [26 kph]. Dewpoint near 74°F [23°C] with humidity of 97%. Pressure around 29.30 in [992.3 mb]. UV Index: 7.65. Chance of precipitation 26% with QPF of 0.00 in [0.0 mm]. Friday Night Overcast with a low around 72°F [22°C]. WSW wind to around 9 mph [14 kph], with gusts to near 16 mph [26 kph]. Chance of precipitation 26% with QPF of 0.00 in [0.0 mm]. Saturday Light Showers with a high near 91°F [33°C]. W wind to around 15 mph [24 kph], with gusts to near 28 mph [45 kph]. Dewpoint near 74°F [23°C] with humidity of 94%. Pressure around 29.30 in [992.3 mb]. UV Index: 7.7. Chance of precipitation 42% with QPF of 0.10 in [2.6 mm]. Saturday Night Light Showers with a low around 73°F [23°C]. W wind to around 15 mph [24 kph], with gusts to near 28 mph [45 kph]. Chance of precipitation 42% with QPF of 0.10 in [2.6 mm]. Sunday Showers with a high near 82°F [28°C]. NE wind to around 8 mph [12 kph], with gusts to near 16 mph [26 kph]. Dewpoint near 74°F [23°C] with humidity of 97%. Pressure around 29.30 in [992.3 mb]. UV Index: 7.7. Chance of precipitation 32% with QPF of 0.18 in [4.5 mm]. Sunday Night Showers with a low around 68°F [20°C]. NE wind to around 8 mph [12 kph], with gusts to near 16 mph [26 kph]. Chance of precipitation 32% with QPF of 0.18 in [4.5 mm]. Monday Light Drizzle with a high near 85°F [30°C]. SSE wind to around 9 mph [15 kph], with gusts to near 22 mph [35 kph]. Dewpoint near 74°F [23°C] with humidity of 96%. Pressure around 29.30 in [992.3 mb]. UV Index: 7.25. Chance of precipitation 8% with QPF of 0.00 in [0.1 mm]. Monday Night Light Drizzle with a low around 67°F [19°C]. SSE wind to around 9 mph [15 kph], with gusts to near 22 mph [35 kph]. Chance of precipitation 8% with QPF of 0.00 in [0.1 mm]. Tuesday Light Drizzle with a high near 90°F [32°C]. W wind to around 19 mph [30 kph], with gusts to near 34 mph [54 kph]. Dewpoint near 74°F [23°C] with humidity of 95%. Pressure around 29.30 in [992.3 mb]. UV Index: 7.15. Chance of precipitation 10% with QPF of 0.02 in [0.6 mm]. Tuesday Night Light Drizzle with a low around 66°F [19°C]. W wind to around 19 mph [30 kph], with gusts to near 34 mph [54 kph]. Chance of precipitation 10% with QPF of 0.02 in [0.6 mm]. Wednesday Overcast with a high near 71°F [22°C]. NNE wind to around 14 mph [22 kph], with gusts to near 30 mph [49 kph]. Dewpoint near 74°F [23°C] with humidity of 87%. Pressure around 29.30 in [992.3 mb]. UV Index: 7.5. Chance of precipitation 4% with QPF of 0.00 in [0.0 mm]. Wednesday Night Overcast with a low around 56°F [13°C]. NNE wind to around 14 mph [22 kph], with gusts to near 30 mph [49 kph]. Chance of precipitation 4% with QPF of 0.00 in [0.0 mm].

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7 Day and Night - QPF Forecast for Janesville, IL

Tonight: 0.0 mm | 0.00 in

Friday: 0.0 mm | 0.00 in

Friday Night: 0.0 mm | 0.00 in

Saturday: 2.6 mm | 0.10 in

Saturday Night: 2.6 mm | 0.10 in

Sunday: 4.5 mm | 0.18 in

Sunday Night: 4.5 mm | 0.18 in

Monday: 0.1 mm | 0.00 in

Monday Night: 0.1 mm | 0.00 in

Tuesday: 0.6 mm | 0.02 in

Tuesday Night: 0.6 mm | 0.02 in

Wednesday: 0.0 mm | 0.00 in

Wednesday Night: 0.0 mm | 0.00 in

7 Day and Night - Maximum Wind Speed Forecast for Janesville, IL

Tonight: S @ 24 kph | 15 mph

Friday: WSW @ 14 kph | 9 mph

Friday Night: WSW @ 14 kph | 9 mph

Saturday: W @ 24 kph | 15 mph

Saturday Night: W @ 24 kph | 15 mph

Sunday: NE @ 12 kph | 8 mph

Sunday Night: NE @ 12 kph | 8 mph

Monday: SSE @ 15 kph | 9 mph

Monday Night: SSE @ 15 kph | 9 mph

Tuesday: W @ 30 kph | 19 mph

Tuesday Night: W @ 30 kph | 19 mph

Wednesday: NNE @ 22 kph | 14 mph

Wednesday Night: NNE @ 22 kph | 14 mph

7 Day and Night - Maximum Humidity Forecast for Janesville, IL

Tonight: 98 %

Friday: 97 %

Friday Night: 97 %

Saturday: 94 %

Saturday Night: 94 %

Sunday: 97 %

Sunday Night: 97 %

Monday: 96 %

Monday Night: 96 %

Tuesday: 95 %

Tuesday Night: 95 %

Wednesday: 87 %

Wednesday Night: 87 %

7 Day and Night - Snowfall Totals Forecast for Janesville, IL

Tonight: 0.0 cm | 0.00 in

Friday: 0.0 cm | 0.00 in

Friday Night: 0.0 cm | 0.00 in

Saturday: 0.0 cm | 0.00 in

Saturday Night: 0.0 cm | 0.00 in

Sunday: 0.0 cm | 0.00 in

Sunday Night: 0.0 cm | 0.00 in

Monday: 0.0 cm | 0.00 in

Monday Night: 0.0 cm | 0.00 in

Tuesday: 0.0 cm | 0.00 in

Tuesday Night: 0.0 cm | 0.00 in

Wednesday: 0.0 cm | 0.00 in

Wednesday Night: 0.0 cm | 0.00 in

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