Harrison, Illinois 7 Day & Night Forecast & Conditions

Current Conditions

Maps Alerts Climate Index

Mostly Clear 78°F 26°C Heat Index: 78°F	Observed at: Harrison, IL	Elevation: 1000 ft | 305 m
	Last Updated: July 16, 10:00 PM Timezone: GMT -5/-4
	Sky Conditions: Mostly Clear	Temperature: 78°F | 26°C
	Pressure: 29.24 in | 990.1 mb	Dewpoint: 67°F | 19°C
	Humidity: 70%	Wind: ESE 4 mph | ESE 6 kph
	Feels Like: 82°F | 28°C	Visibility: 42.8 mi | 68.9 km
	Lat/Long: 42.4272 | -89.1914	Sunrise: 5:34 AM   Sunset: 8:31 PM

7 Day Graphical Forecast

Valid: 10:13 PM 7/16/2026

Tonight Overcast 70 °F 21% Chance Precipitation Friday Overcast 94 |70 °F 15% Chance Precipitation Saturday Overcast 89 |70 °F 6% Chance Precipitation Sunday Overcast 82 |62 °F 1% Chance Precipitation Monday Overcast 84 |63 °F 45% Chance Precipitation Tuesday Light Showers 82 |58 °F 45% Chance Precipitation Wednesday Partly Cloudy 73 |48 °F 3% Chance Precipitation

7 Hour Graphical Forecast

Valid: 10:13 PM 7/16/2026

10 PM Mostly Clear 78 °F 5% Chance Precipitation

11 PM Overcast 76 °F 3% Chance Precipitation

12 AM Overcast 76 °F 1% Chance Precipitation

1 AM Overcast 74 °F 1% Chance Precipitation

2 AM Mostly Clear 73 °F 1% Chance Precipitation

3 AM Clear 72 °F 2% Chance Precipitation

4 AM Clear 71 °F 2% Chance Precipitation

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

7 Day & Night Weather Forecast for Harrison, IL - (Fahrenheit & Celsius) Valid: 10:13 PM 7/16/2026 Tonight Overcast with a low around 70°F [21°C]. ENE wind to around 11 mph [17 kph], with gusts to near 13 mph [22 kph]. Chance of precipitation 21% with QPF of 0.00 in [0.0 mm]. Friday Overcast with a high near 94°F [34°C]. SW wind to around 11 mph [17 kph], with gusts to near 19 mph [30 kph]. Dewpoint near 67°F [19°C] with humidity of 93%. Pressure around 29.24 in [990.1 mb]. UV Index: 7.4. Chance of precipitation 15% with QPF of 0.00 in [0.0 mm]. Friday Night Overcast with a low around 70°F [21°C]. SW wind to around 11 mph [17 kph], with gusts to near 19 mph [30 kph]. Chance of precipitation 15% with QPF of 0.00 in [0.0 mm]. Saturday Overcast with a high near 89°F [32°C]. NW wind to around 15 mph [25 kph], with gusts to near 23 mph [37 kph]. Dewpoint near 67°F [19°C] with humidity of 78%. Pressure around 29.24 in [990.1 mb]. UV Index: 7.35. Chance of precipitation 6% with QPF of 0.00 in [0.0 mm]. Saturday Night Overcast with a low around 70°F [21°C]. NW wind to around 15 mph [25 kph], with gusts to near 23 mph [37 kph]. Chance of precipitation 6% with QPF of 0.00 in [0.0 mm]. Sunday Overcast with a high near 82°F [28°C]. ESE wind to around 8 mph [13 kph], with gusts to near 16 mph [26 kph]. Dewpoint near 67°F [19°C] with humidity of 96%. Pressure around 29.24 in [990.1 mb]. UV Index: 7.45. Chance of precipitation 1% with QPF of 0.00 in [0.0 mm]. Sunday Night Overcast with a low around 62°F [16°C]. ESE wind to around 8 mph [13 kph], with gusts to near 16 mph [26 kph]. Chance of precipitation 1% with QPF of 0.00 in [0.0 mm]. Monday Overcast with a high near 84°F [29°C]. SSW wind to around 16 mph [25 kph], with gusts to near 34 mph [54 kph]. Dewpoint near 67°F [19°C] with humidity of 96%. Pressure around 29.24 in [990.1 mb]. UV Index: 7.1. Chance of precipitation 45% with QPF of 0.00 in [0.0 mm]. Monday Night Overcast with a low around 63°F [17°C]. SSW wind to around 16 mph [25 kph], with gusts to near 34 mph [54 kph]. Chance of precipitation 45% with QPF of 0.00 in [0.0 mm]. Tuesday Light Showers with a high near 82°F [28°C]. NW wind to around 20 mph [31 kph], with gusts to near 38 mph [61 kph]. Dewpoint near 67°F [19°C] with humidity of 95%. Pressure around 29.24 in [990.1 mb]. UV Index: 6.15. Chance of precipitation 45% with QPF of 0.12 in [3.0 mm]. Tuesday Night Light Showers with a low around 58°F [14°C]. NW wind to around 20 mph [31 kph], with gusts to near 38 mph [61 kph]. Chance of precipitation 45% with QPF of 0.12 in [3.0 mm]. Wednesday Partly Cloudy with a high near 73°F [23°C]. N wind to around 12 mph [20 kph], with gusts to near 26 mph [42 kph]. Dewpoint near 67°F [19°C] with humidity of 85%. Pressure around 29.24 in [990.1 mb]. UV Index: 7.2. Chance of precipitation 3% with QPF of 0.00 in [0.0 mm]. Wednesday Night Partly Cloudy with a low around 48°F [9°C]. N wind to around 12 mph [20 kph], with gusts to near 26 mph [42 kph]. Chance of precipitation 3% with QPF of 0.00 in [0.0 mm].

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7 Day and Night - QPF Forecast for Harrison, IL

Tonight: 0.0 mm | 0.00 in

Friday: 0.0 mm | 0.00 in

Friday Night: 0.0 mm | 0.00 in

Saturday: 0.0 mm | 0.00 in

Saturday Night: 0.0 mm | 0.00 in

Sunday: 0.0 mm | 0.00 in

Sunday Night: 0.0 mm | 0.00 in

Monday: 0.0 mm | 0.00 in

Monday Night: 0.0 mm | 0.00 in

Tuesday: 3.0 mm | 0.12 in

Tuesday Night: 3.0 mm | 0.12 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 Harrison, IL

Tonight: ENE @ 17 kph | 11 mph

Friday: SW @ 17 kph | 11 mph

Friday Night: SW @ 17 kph | 11 mph

Saturday: NW @ 25 kph | 15 mph

Saturday Night: NW @ 25 kph | 15 mph

Sunday: ESE @ 13 kph | 8 mph

Sunday Night: ESE @ 13 kph | 8 mph

Monday: SSW @ 25 kph | 16 mph

Monday Night: SSW @ 25 kph | 16 mph

Tuesday: NW @ 31 kph | 20 mph

Tuesday Night: NW @ 31 kph | 20 mph

Wednesday: N @ 20 kph | 12 mph

Wednesday Night: N @ 20 kph | 12 mph

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

Tonight: 90 %

Friday: 93 %

Friday Night: 93 %

Saturday: 78 %

Saturday Night: 78 %

Sunday: 96 %

Sunday Night: 96 %

Monday: 96 %

Monday Night: 96 %

Tuesday: 95 %

Tuesday Night: 95 %

Wednesday: 85 %

Wednesday Night: 85 %

7 Day and Night - Snowfall Totals Forecast for Harrison, 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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