Mason, Illinois 7 Day & Night Forecast & Conditions

Current Conditions

Maps Alerts Climate Index

Clear 78°F 26°C Heat Index: 78°F	Observed at: Mason, IL	Elevation: 604 ft | 184 m
	Last Updated: July 16, 10:15 PM Timezone: GMT -5/-4
	Sky Conditions: Clear	Temperature: 78°F | 26°C
	Pressure: 29.42 in | 996.4 mb	Dewpoint: 76°F | 24°C
	Humidity: 94%	Wind: E 1 mph | E 2 kph
	Feels Like: 89°F | 32°C	Visibility: 25.1 mi | 40.4 km
	Lat/Long: 38.9531 | -88.6236	Sunrise: 5:42 AM   Sunset: 8:18 PM

7 Day Graphical Forecast

Valid: 10:20 PM 7/16/2026

Tonight Overcast 74 °F 36% Chance Precipitation Friday Overcast 89 |73 °F 20% Chance Precipitation Saturday Mostly Clear 92 |74 °F 49% Chance Precipitation Sunday Showers 85 |71 °F 35% Chance Precipitation Monday Heavy Drizzle 88 |68 °F 5% Chance Precipitation Tuesday Light Drizzle 91 |65 °F 7% Chance Precipitation Wednesday Mostly Clear 73 |57 °F 5% Chance Precipitation

7 Hour Graphical Forecast

Valid: 10:20 PM 7/16/2026

10 PM Clear 78 °F 3% Chance Precipitation

11 PM Clear 77 °F 5% Chance Precipitation

12 AM Overcast 76 °F 3% Chance Precipitation

1 AM Partly Cloudy 76 °F 4% Chance Precipitation

2 AM Clear 75 °F 3% Chance Precipitation

3 AM Overcast 75 °F 3% Chance Precipitation

4 AM Partly Cloudy 74 °F 4% Chance Precipitation

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

7 Day & Night Weather Forecast for Mason, IL - (Fahrenheit & Celsius) Valid: 10:20 PM 7/16/2026 Tonight Overcast with a low around 74°F [23°C]. SE wind to around 11 mph [17 kph], with gusts to near 12 mph [19 kph]. Chance of precipitation 36% with QPF of 0.00 in [0.0 mm]. Friday Overcast with a high near 89°F [32°C]. WSW wind to around 10 mph [16 kph], with gusts to near 16 mph [26 kph]. Dewpoint near 76°F [24°C] with humidity of 97%. Pressure around 29.42 in [996.4 mb]. UV Index: 7.7. Chance of precipitation 20% with QPF of 0.00 in [0.0 mm]. Friday Night Overcast with a low around 73°F [23°C]. WSW wind to around 10 mph [16 kph], with gusts to near 16 mph [26 kph]. Chance of precipitation 20% with QPF of 0.00 in [0.0 mm]. Saturday Mostly Clear with a high near 92°F [33°C]. W wind to around 15 mph [23 kph], with gusts to near 27 mph [44 kph]. Dewpoint near 76°F [24°C] with humidity of 88%. Pressure around 29.42 in [996.4 mb]. UV Index: 7.75. Chance of precipitation 49% with QPF of 0.02 in [0.4 mm]. Saturday Night Mostly Clear with a low around 74°F [23°C]. W wind to around 15 mph [23 kph], with gusts to near 27 mph [44 kph]. Chance of precipitation 49% with QPF of 0.02 in [0.4 mm]. Sunday Showers with a high near 85°F [29°C]. ENE wind to around 8 mph [13 kph], with gusts to near 15 mph [23 kph]. Dewpoint near 76°F [24°C] with humidity of 98%. Pressure around 29.42 in [996.4 mb]. UV Index: 7.7. Chance of precipitation 35% with QPF of 0.28 in [7.2 mm]. Sunday Night Showers with a low around 71°F [21°C]. ENE wind to around 8 mph [13 kph], with gusts to near 15 mph [23 kph]. Chance of precipitation 35% with QPF of 0.28 in [7.2 mm]. Monday Heavy Drizzle with a high near 88°F [31°C]. SSE wind to around 8 mph [13 kph], with gusts to near 21 mph [34 kph]. Dewpoint near 76°F [24°C] with humidity of 88%. Pressure around 29.42 in [996.4 mb]. UV Index: 6.25. Chance of precipitation 5% with QPF of 0.06 in [1.4 mm]. Monday Night Heavy Drizzle with a low around 68°F [20°C]. SSE wind to around 8 mph [13 kph], with gusts to near 21 mph [34 kph]. Chance of precipitation 5% with QPF of 0.06 in [1.4 mm]. Tuesday Light Drizzle with a high near 91°F [33°C]. W wind to around 18 mph [29 kph], with gusts to near 33 mph [53 kph]. Dewpoint near 76°F [24°C] with humidity of 91%. Pressure around 29.42 in [996.4 mb]. UV Index: 7.3. Chance of precipitation 7% with QPF of 0.02 in [0.6 mm]. Tuesday Night Light Drizzle with a low around 65°F [18°C]. W wind to around 18 mph [29 kph], with gusts to near 33 mph [53 kph]. Chance of precipitation 7% with QPF of 0.02 in [0.6 mm]. Wednesday Mostly Clear with a high near 73°F [23°C]. NNE wind to around 13 mph [20 kph], with gusts to near 29 mph [46 kph]. Dewpoint near 76°F [24°C] with humidity of 90%. Pressure around 29.42 in [996.4 mb]. UV Index: 7.6. Chance of precipitation 5% with QPF of 0.00 in [0.0 mm]. Wednesday Night Mostly Clear with a low around 57°F [14°C]. NNE wind to around 13 mph [20 kph], with gusts to near 29 mph [46 kph]. Chance of precipitation 5% with QPF of 0.00 in [0.0 mm].

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7 Day and Night - QPF Forecast for Mason, IL

Tonight: 0.0 mm | 0.00 in

Friday: 0.0 mm | 0.00 in

Friday Night: 0.0 mm | 0.00 in

Saturday: 0.4 mm | 0.02 in

Saturday Night: 0.4 mm | 0.02 in

Sunday: 7.2 mm | 0.28 in

Sunday Night: 7.2 mm | 0.28 in

Monday: 1.4 mm | 0.06 in

Monday Night: 1.4 mm | 0.06 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 Mason, IL

Tonight: SE @ 17 kph | 11 mph

Friday: WSW @ 16 kph | 10 mph

Friday Night: WSW @ 16 kph | 10 mph

Saturday: W @ 23 kph | 15 mph

Saturday Night: W @ 23 kph | 15 mph

Sunday: ENE @ 13 kph | 8 mph

Sunday Night: ENE @ 13 kph | 8 mph

Monday: SSE @ 13 kph | 8 mph

Monday Night: SSE @ 13 kph | 8 mph

Tuesday: W @ 29 kph | 18 mph

Tuesday Night: W @ 29 kph | 18 mph

Wednesday: NNE @ 20 kph | 13 mph

Wednesday Night: NNE @ 20 kph | 13 mph

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

Tonight: 100 %

Friday: 97 %

Friday Night: 97 %

Saturday: 88 %

Saturday Night: 88 %

Sunday: 98 %

Sunday Night: 98 %

Monday: 88 %

Monday Night: 88 %

Tuesday: 91 %

Tuesday Night: 91 %

Wednesday: 90 %

Wednesday Night: 90 %

7 Day and Night - Snowfall Totals Forecast for Mason, 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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