Lancaster, Illinois 7 Day & Night Forecast & Conditions

Current Conditions

Maps Alerts Climate Index

Clear 63°F 17°C	Observed at: Lancaster, IL	Elevation: 551 ft | 168 m
	Last Updated: July 29, 6:30 AM Timezone: GMT -5/-4
	Sky Conditions: Clear	Temperature: 63°F | 17°C
	Pressure: 29.38 in | 995 mb	Dewpoint: 60°F | 16°C
	Humidity: 89%	Wind: N 5 mph | N 8 kph
	Feels Like: 64°F | 18°C	Visibility: 27.5 mi | 44.3 km
	Lat/Long: 38.5478 | -87.8653	Sunrise: 5:50 AM   Sunset: 8:04 PM

7 Day Graphical Forecast

Valid: 6:42 AM 7/29/2026

Today Clear 88 |64 °F 31 |18 °C 0% Chance Precipitation Thursday Overcast 88 |65 °F 31 |18 °C 0% Chance Precipitation Friday Drizzle 80 |65 °F 27 |18 °C 67% Chance Precipitation Saturday Showers 69 |64 °F 20 |18 °C 67% Chance Precipitation Sunday Overcast 79 |62 °F 26 |17 °C 34% Chance Precipitation Monday Mostly Clear 81 |62 °F 27 |17 °C 27% Chance Precipitation Tuesday Partly Cloudy 84 |63 °F 29 |17 °C 25% Chance Precipitation

7 Hour Graphical Forecast

Valid: 6:42 AM 7/29/2026

6 AM Clear 64 °F 0% Chance Precipitation

7 AM Clear 65 °F 0% Chance Precipitation

8 AM Clear 68 °F 0% Chance Precipitation

9 AM Clear 71 °F 0% Chance Precipitation

10 AM Clear 75 °F 0% Chance Precipitation

11 AM Clear 79 °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 Lancaster, IL - (Fahrenheit & Celsius) Valid: 6:42 AM 7/29/2026 Today Clear with a high near 88°F [31°C]. NNE wind to around 9 mph [15 kph], with gusts to near 16 mph [25 kph]. Dewpoint near 60°F [16°C] with humidity of 91%. Pressure around 29.38 in [995 mb]. UV Index: 7.6. Chance of precipitation 0% with QPF of 0.00 in [0.0 mm]. Tonight Clear with a low around 64°F [18°C]. NNE wind to around 9 mph [15 kph], with gusts to near 16 mph [25 kph]. Chance of precipitation 0% with QPF of 0.00 in [0.0 mm]. Thursday Overcast with a high near 88°F [31°C]. ENE wind to around 7 mph [11 kph], with gusts to near 15 mph [24 kph]. Dewpoint near 60°F [16°C] with humidity of 71%. Pressure around 29.38 in [995 mb]. UV Index: 7.6. Chance of precipitation 0% with QPF of 0.00 in [0.0 mm]. Thursday Night Overcast with a low around 65°F [18°C]. ENE wind to around 7 mph [11 kph], with gusts to near 15 mph [24 kph]. Chance of precipitation 0% with QPF of 0.00 in [0.0 mm]. Friday Drizzle with a high near 80°F [27°C]. SE wind to around 12 mph [19 kph], with gusts to near 18 mph [29 kph]. Dewpoint near 60°F [16°C] with humidity of 94%. Pressure around 29.38 in [995 mb]. UV Index: 5.9. Chance of precipitation 67% with QPF of 0.07 in [1.8 mm]. Friday Night Drizzle with a low around 65°F [18°C]. SE wind to around 12 mph [19 kph], with gusts to near 18 mph [29 kph]. Chance of precipitation 67% with QPF of 0.07 in [1.8 mm]. Saturday Showers with a high near 69°F [20°C]. NE wind to around 18 mph [29 kph], with gusts to near 28 mph [44 kph]. Dewpoint near 60°F [16°C] with humidity of 98%. Pressure around 29.38 in [995 mb]. UV Index: 0.4. Chance of precipitation 67% with QPF of 0.80 in [20.3 mm]. Saturday Night Showers with a low around 64°F [18°C]. NE wind to around 18 mph [29 kph], with gusts to near 28 mph [44 kph]. Chance of precipitation 67% with QPF of 0.80 in [20.3 mm]. Sunday Overcast with a high near 79°F [26°C]. N wind to around 14 mph [22 kph], with gusts to near 28 mph [45 kph]. Dewpoint near 60°F [16°C] with humidity of 97%. Pressure around 29.38 in [995 mb]. UV Index: 7.4. Chance of precipitation 34% with QPF of 0.00 in [0.0 mm]. Sunday Night Overcast with a low around 62°F [17°C]. N wind to around 14 mph [22 kph], with gusts to near 28 mph [45 kph]. Chance of precipitation 34% with QPF of 0.00 in [0.0 mm]. Monday Mostly Clear with a high near 81°F [27°C]. NNE wind to around 9 mph [14 kph], with gusts to near 21 mph [33 kph]. Dewpoint near 60°F [16°C] with humidity of 97%. Pressure around 29.38 in [995 mb]. UV Index: 7.15. Chance of precipitation 27% with QPF of 0.00 in [0.0 mm]. Monday Night Mostly Clear with a low around 62°F [17°C]. NNE wind to around 9 mph [14 kph], with gusts to near 21 mph [33 kph]. Chance of precipitation 27% with QPF of 0.00 in [0.0 mm]. Tuesday Partly Cloudy with a high near 84°F [29°C]. E wind to around 8 mph [13 kph], with gusts to near 18 mph [28 kph]. Dewpoint near 60°F [16°C] with humidity of 94%. Pressure around 29.38 in [995 mb]. UV Index: 7.35. Chance of precipitation 25% with QPF of 0.00 in [0.0 mm]. Tuesday Night Partly Cloudy with a low around 63°F [17°C]. E wind to around 8 mph [13 kph], with gusts to near 18 mph [28 kph]. Chance of precipitation 25% with QPF of 0.00 in [0.0 mm].

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7 Day and Night - QPF Forecast for Lancaster, IL

Today: 0.0 mm | 0.00 in

Tonight: 0.0 mm | 0.00 in

Thursday: 0.0 mm | 0.00 in

Thursday Night: 0.0 mm | 0.00 in

Friday: 1.8 mm | 0.07 in

Friday Night: 1.8 mm | 0.07 in

Saturday: 20.3 mm | 0.80 in

Saturday Night: 20.3 mm | 0.80 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: 0.0 mm | 0.00 in

Tuesday Night: 0.0 mm | 0.00 in

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

Today: NNE @ 15 kph | 9 mph

Tonight: NNE @ 15 kph | 9 mph

Thursday: ENE @ 11 kph | 7 mph

Thursday Night: ENE @ 11 kph | 7 mph

Friday: SE @ 19 kph | 12 mph

Friday Night: SE @ 19 kph | 12 mph

Saturday: NE @ 29 kph | 18 mph

Saturday Night: NE @ 29 kph | 18 mph

Sunday: N @ 22 kph | 14 mph

Sunday Night: N @ 22 kph | 14 mph

Monday: NNE @ 14 kph | 9 mph

Monday Night: NNE @ 14 kph | 9 mph

Tuesday: E @ 13 kph | 8 mph

Tuesday Night: E @ 13 kph | 8 mph

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

Today: 91 %

Tonight: 91 %

Thursday: 71 %

Thursday Night: 71 %

Friday: 94 %

Friday Night: 94 %

Saturday: 98 %

Saturday Night: 98 %

Sunday: 97 %

Sunday Night: 97 %

Monday: 97 %

Monday Night: 97 %

Tuesday: 94 %

Tuesday Night: 94 %

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

Today: 0.0 cm | 0.00 in

Tonight: 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

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

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