Posen, Illinois 7 Day & Night Forecast & Conditions

Current Conditions

Maps Alerts Climate Index

Clear 88°F 31°C Heat Index: 99°F	Observed at: Posen, IL	Elevation: 514 ft | 157 m
	Last Updated: July 27, 8:15 PM Timezone: GMT -5/-4
	Sky Conditions: Clear	Temperature: 88°F | 31°C
	Pressure: 29.24 in | 990.3 mb	Dewpoint: 77°F | 25°C
	Humidity: 68%	Wind: SSW 4 mph | SSW 6 kph
	Feels Like: 98°F | 37°C	Visibility: 47.9 mi | 77.1 km
	Lat/Long: 38.2583 | -89.3356	Sunrise: 5:55 AM   Sunset: 8:11 PM

7 Day Graphical Forecast

Valid: 6:56 AM 7/29/2026

Tonight Overcast 74 °F 10% Chance Precipitation Tuesday Overcast 95 |79 °F 5% Chance Precipitation Wednesday Overcast 83 |67 °F 2% Chance Precipitation Thursday Overcast 86 |63 °F 0% Chance Precipitation Friday Light Showers 75 |67 °F 39% Chance Precipitation Saturday Drizzle 78 |67 °F 55% Chance Precipitation Sunday Mostly Clear 84 |63 °F 21% Chance Precipitation

7 Hour Graphical Forecast

Valid: 6:56 AM 7/29/2026

6 AM Clear 67 °F 2% Chance Precipitation

7 AM Clear 68 °F 0% Chance Precipitation

8 AM Clear 71 °F 0% Chance Precipitation

9 AM Clear 74 °F 0% Chance Precipitation

10 AM Clear 78 °F 0% Chance Precipitation

11 AM Clear 80 °F 0% Chance Precipitation

12 PM Clear 82 °F 0% Chance Precipitation

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

7 Day & Night Weather Forecast for Posen, IL - (Fahrenheit & Celsius) Valid: 6:56 AM 7/29/2026 Tonight Overcast with a low around 74°F [23°C]. SSW wind to around 13 mph [21 kph], with gusts to near 31 mph [49 kph]. Chance of precipitation 10% with QPF of 0.00 in [0.0 mm]. Tuesday Overcast with a high near 95°F [35°C]. NNW wind to around 13 mph [21 kph], with gusts to near 20 mph [32 kph]. Dewpoint near 77°F [25°C] with humidity of 80%. Pressure around 29.24 in [990.3 mb]. UV Index: 7.7. Chance of precipitation 5% with QPF of 0.00 in [0.0 mm]. Tuesday Night Overcast with a low around 79°F [26°C]. NNW wind to around 13 mph [21 kph], with gusts to near 20 mph [32 kph]. Chance of precipitation 5% with QPF of 0.00 in [0.0 mm]. Wednesday Overcast with a high near 83°F [28°C]. NE wind to around 13 mph [21 kph], with gusts to near 25 mph [40 kph]. Dewpoint near 77°F [25°C] with humidity of 85%. Pressure around 29.24 in [990.3 mb]. UV Index: 7.7. Chance of precipitation 2% with QPF of 0.00 in [0.0 mm]. Wednesday Night Overcast with a low around 67°F [20°C]. NE wind to around 13 mph [21 kph], with gusts to near 25 mph [40 kph]. Chance of precipitation 2% with QPF of 0.00 in [0.0 mm]. Thursday Overcast with a high near 86°F [30°C]. ESE wind to around 8 mph [12 kph], with gusts to near 15 mph [25 kph]. Dewpoint near 77°F [25°C] with humidity of 90%. Pressure around 29.24 in [990.3 mb]. UV Index: 7.65. Chance of precipitation 0% with QPF of 0.00 in [0.0 mm]. Thursday Night Overcast with a low around 63°F [17°C]. ESE wind to around 8 mph [12 kph], with gusts to near 15 mph [25 kph]. Chance of precipitation 0% with QPF of 0.00 in [0.0 mm]. Friday Light Showers with a high near 75°F [24°C]. SSE wind to around 13 mph [22 kph], with gusts to near 22 mph [35 kph]. Dewpoint near 77°F [25°C] with humidity of 97%. Pressure around 29.24 in [990.3 mb]. UV Index: 5.35. Chance of precipitation 39% with QPF of 0.22 in [5.7 mm]. Friday Night Light Showers with a low around 67°F [20°C]. SSE wind to around 13 mph [22 kph], with gusts to near 22 mph [35 kph]. Chance of precipitation 39% with QPF of 0.22 in [5.7 mm]. Saturday Drizzle with a high near 78°F [25°C]. NE wind to around 14 mph [22 kph], with gusts to near 25 mph [41 kph]. Dewpoint near 77°F [25°C] with humidity of 99%. Pressure around 29.24 in [990.3 mb]. UV Index: 5.25. Chance of precipitation 55% with QPF of 0.15 in [3.8 mm]. Saturday Night Drizzle with a low around 67°F [19°C]. NE wind to around 14 mph [22 kph], with gusts to near 25 mph [41 kph]. Chance of precipitation 55% with QPF of 0.15 in [3.8 mm]. Sunday Mostly Clear with a high near 84°F [29°C]. NNE wind to around 12 mph [19 kph], with gusts to near 18 mph [29 kph]. Dewpoint near 77°F [25°C] with humidity of 97%. Pressure around 29.24 in [990.3 mb]. UV Index: 7.45. Chance of precipitation 21% with QPF of 0.00 in [0.0 mm]. Sunday Night Mostly Clear with a low around 63°F [17°C]. NNE wind to around 12 mph [19 kph], with gusts to near 18 mph [29 kph]. Chance of precipitation 21% with QPF of 0.00 in [0.0 mm].

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7 Day and Night - QPF Forecast for Posen, IL

Tonight: 0.0 mm | 0.00 in

Tuesday: 0.0 mm | 0.00 in

Tuesday Night: 0.0 mm | 0.00 in

Wednesday: 0.0 mm | 0.00 in

Wednesday Night: 0.0 mm | 0.00 in

Thursday: 0.0 mm | 0.00 in

Thursday Night: 0.0 mm | 0.00 in

Friday: 5.7 mm | 0.22 in

Friday Night: 5.7 mm | 0.22 in

Saturday: 3.8 mm | 0.15 in

Saturday Night: 3.8 mm | 0.15 in

Sunday: 0.0 mm | 0.00 in

Sunday Night: 0.0 mm | 0.00 in

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

Tonight: SSW @ 21 kph | 13 mph

Tuesday: NNW @ 21 kph | 13 mph

Tuesday Night: NNW @ 21 kph | 13 mph

Wednesday: NE @ 21 kph | 13 mph

Wednesday Night: NE @ 21 kph | 13 mph

Thursday: ESE @ 12 kph | 8 mph

Thursday Night: ESE @ 12 kph | 8 mph

Friday: SSE @ 22 kph | 13 mph

Friday Night: SSE @ 22 kph | 13 mph

Saturday: NE @ 22 kph | 14 mph

Saturday Night: NE @ 22 kph | 14 mph

Sunday: NNE @ 19 kph | 12 mph

Sunday Night: NNE @ 19 kph | 12 mph

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

Tonight: 94 %

Tuesday: 80 %

Tuesday Night: 80 %

Wednesday: 85 %

Wednesday Night: 85 %

Thursday: 90 %

Thursday Night: 90 %

Friday: 97 %

Friday Night: 97 %

Saturday: 99 %

Saturday Night: 99 %

Sunday: 97 %

Sunday Night: 97 %

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

Tonight: 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

Thursday: 0.0 cm | 0.00 in

Thursday Night: 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

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