Mason City, Illinois 7 Day & Night Forecast & Conditions

Current Conditions

Maps Alerts Climate Index

Clear 85°F 29°C Heat Index: 91°F	Observed at: Mason City, IL	Elevation: 766 ft | 233 m
	Last Updated: July 27, 8:30 PM Timezone: GMT -5/-4
	Sky Conditions: Clear	Temperature: 85°F | 29°C
	Pressure: 29.09 in | 985 mb	Dewpoint: 72°F | 22°C
	Humidity: 66%	Wind: SW 9 mph | SW 14 kph
	Feels Like: 90°F | 32°C	Visibility: 50.6 mi | 81.4 km
	Lat/Long: 40.2022 | -89.6981	Sunrise: 5:52 AM   Sunset: 8:18 PM

7 Day Graphical Forecast

Valid: 5:42 AM 7/29/2026

Tonight Overcast 77 °F 24% Chance Precipitation Tuesday Overcast 88 |74 °F 3% Chance Precipitation Wednesday Clear 81 |64 °F 1% Chance Precipitation Thursday Overcast 84 |64 °F 1% Chance Precipitation Friday Heavy Showers 74 |65 °F 48% Chance Precipitation Saturday Thunderstorm 80 |62 °F 47% Chance Precipitation Sunday Light Drizzle 82 |65 °F 18% Chance Precipitation

7 Hour Graphical Forecast

Valid: 5:42 AM 7/29/2026

5 AM Clear 65 °F 0% Chance Precipitation

6 AM Clear 64 °F 1% Chance Precipitation

7 AM Clear 64 °F 1% Chance Precipitation

8 AM Clear 69 °F 0% Chance Precipitation

9 AM Clear 73 °F 0% Chance Precipitation

10 AM Clear 77 °F 0% Chance Precipitation

11 AM Clear 80 °F 0% Chance Precipitation

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

7 Day & Night Weather Forecast for Mason City, IL - (Fahrenheit & Celsius) Valid: 5:42 AM 7/29/2026 Tonight Overcast with a low around 77°F [25°C]. SSW wind to around 17 mph [27 kph], with gusts to near 24 mph [39 kph]. Chance of precipitation 24% with QPF of 0.00 in [0.0 mm]. Tuesday Overcast with a high near 88°F [31°C]. N wind to around 12 mph [19 kph], with gusts to near 23 mph [37 kph]. Dewpoint near 72°F [22°C] with humidity of 91%. Pressure around 29.09 in [985 mb]. UV Index: 7.25. Chance of precipitation 3% with QPF of 0.00 in [0.0 mm]. Tuesday Night Overcast with a low around 74°F [23°C]. N wind to around 12 mph [19 kph], with gusts to near 23 mph [37 kph]. Chance of precipitation 3% with QPF of 0.00 in [0.0 mm]. Wednesday Clear with a high near 81°F [27°C]. ENE wind to around 11 mph [17 kph], with gusts to near 19 mph [30 kph]. Dewpoint near 72°F [22°C] with humidity of 89%. Pressure around 29.09 in [985 mb]. UV Index: 7.55. Chance of precipitation 1% with QPF of 0.00 in [0.0 mm]. Wednesday Night Clear with a low around 64°F [18°C]. ENE wind to around 11 mph [17 kph], with gusts to near 19 mph [30 kph]. Chance of precipitation 1% with QPF of 0.00 in [0.0 mm]. Thursday Overcast with a high near 84°F [29°C]. S wind to around 8 mph [13 kph], with gusts to near 15 mph [24 kph]. Dewpoint near 72°F [22°C] with humidity of 91%. Pressure around 29.09 in [985 mb]. UV Index: 7.5. Chance of precipitation 1% with QPF of 0.00 in [0.0 mm]. Thursday Night Overcast with a low around 64°F [18°C]. S wind to around 8 mph [13 kph], with gusts to near 15 mph [24 kph]. Chance of precipitation 1% with QPF of 0.00 in [0.0 mm]. Friday Heavy Showers with a high near 74°F [24°C]. ESE wind to around 13 mph [21 kph], with gusts to near 25 mph [41 kph]. Dewpoint near 72°F [22°C] with humidity of 98%. Pressure around 29.09 in [985 mb]. UV Index: 1. Chance of precipitation 48% with QPF of 1.45 in [36.9 mm]. Friday Night Heavy Showers with a low around 65°F [19°C]. ESE wind to around 13 mph [21 kph], with gusts to near 25 mph [41 kph]. Chance of precipitation 48% with QPF of 1.45 in [36.9 mm]. Saturday Thunderstorm with a high near 80°F [27°C]. NNE wind to around 13 mph [21 kph], with gusts to near 18 mph [29 kph]. Dewpoint near 72°F [22°C] with humidity of 98%. Pressure around 29.09 in [985 mb]. UV Index: 7.1. Chance of precipitation 47% with QPF of 0.15 in [3.7 mm]. Saturday Night Thunderstorm with a low around 62°F [17°C]. NNE wind to around 13 mph [21 kph], with gusts to near 18 mph [29 kph]. Chance of precipitation 47% with QPF of 0.15 in [3.7 mm]. Sunday Light Drizzle with a high near 82°F [28°C]. NNE wind to around 10 mph [17 kph], with gusts to near 12 mph [19 kph]. Dewpoint near 72°F [22°C] with humidity of 97%. Pressure around 29.09 in [985 mb]. UV Index: 7.3. Chance of precipitation 18% with QPF of 0.03 in [0.8 mm]. Sunday Night Light Drizzle with a low around 65°F [19°C]. NNE wind to around 10 mph [17 kph], with gusts to near 12 mph [19 kph]. Chance of precipitation 18% with QPF of 0.03 in [0.8 mm].

---

7 Day and Night - QPF Forecast for Mason City, 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: 36.9 mm | 1.45 in

Friday Night: 36.9 mm | 1.45 in

Saturday: 3.7 mm | 0.15 in

Saturday Night: 3.7 mm | 0.15 in

Sunday: 0.8 mm | 0.03 in

Sunday Night: 0.8 mm | 0.03 in

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

Tonight: SSW @ 27 kph | 17 mph

Tuesday: N @ 19 kph | 12 mph

Tuesday Night: N @ 19 kph | 12 mph

Wednesday: ENE @ 17 kph | 11 mph

Wednesday Night: ENE @ 17 kph | 11 mph

Thursday: S @ 13 kph | 8 mph

Thursday Night: S @ 13 kph | 8 mph

Friday: ESE @ 21 kph | 13 mph

Friday Night: ESE @ 21 kph | 13 mph

Saturday: NNE @ 21 kph | 13 mph

Saturday Night: NNE @ 21 kph | 13 mph

Sunday: NNE @ 17 kph | 10 mph

Sunday Night: NNE @ 17 kph | 10 mph

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

Tonight: 98 %

Tuesday: 91 %

Tuesday Night: 91 %

Wednesday: 89 %

Wednesday Night: 89 %

Thursday: 91 %

Thursday Night: 91 %

Friday: 98 %

Friday Night: 98 %

Saturday: 98 %

Saturday Night: 98 %

Sunday: 97 %

Sunday Night: 97 %

7 Day and Night - Snowfall Totals Forecast for Mason City, 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

Contact Us | Mobile Private Policy | Terms & Conds | Consent Preferences | Cookie Policy Never base any life decisions on weather information from this site or anywhere over the Internet. Site is dedicated to our Lord & Savior Jesus Christ | Random Quotes of Jesus Copyright © 2026 El Dorado Weather, Inc. | Site Designed By:  Webmaster Danny