Marissa, Illinois 7 Day & Night Forecast & Conditions

Current Conditions

Maps Alerts Climate Index

Mostly Clear 78°F 26°C Heat Index: 78°F	Observed at: Marissa, IL	Elevation: 512 ft | 156 m
	Last Updated: July 16, 10:15 PM Timezone: GMT -5/-4
	Sky Conditions: Mostly Clear	Temperature: 78°F | 26°C
	Pressure: 29.54 in | 1000.5 mb	Dewpoint: 75°F | 24°C
	Humidity: 90%	Wind: W 4 mph | W 6 kph
	Feels Like: 88°F | 31°C	Visibility: 28.3 mi | 45.6 km
	Lat/Long: 38.25 | -89.75	Sunrise: 5:48 AM   Sunset: 8:21 PM

7 Day Graphical Forecast

Valid: 10:24 PM 7/16/2026

Tonight Light Drizzle 74 °F 39% Chance Precipitation Friday Overcast 90 |74 °F 13% Chance Precipitation Saturday Overcast 93 |74 °F 34% Chance Precipitation Sunday Thunderstorm with Hail 93 |73 °F 34% Chance Precipitation Monday Light Drizzle 96 |72 °F 6% Chance Precipitation Tuesday Overcast 101 |68 °F 4% Chance Precipitation Wednesday Overcast 73 |61 °F 3% Chance Precipitation

7 Hour Graphical Forecast

Valid: 10:24 PM 7/16/2026

10 PM Mostly Clear 78 °F 8% Chance Precipitation

11 PM Clear 77 °F 3% Chance Precipitation

12 AM Clear 77 °F 2% Chance Precipitation

1 AM Clear 76 °F 2% Chance Precipitation

2 AM Clear 76 °F 2% Chance Precipitation

3 AM Clear 75 °F 3% Chance Precipitation

4 AM Clear 75 °F 8% Chance Precipitation

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

7 Day & Night Weather Forecast for Marissa, IL - (Fahrenheit & Celsius) Valid: 10:24 PM 7/16/2026 Tonight Light Drizzle with a low around 74°F [24°C]. SW wind to around 10 mph [16 kph], with gusts to near 11 mph [17 kph]. Chance of precipitation 39% with QPF of 0.02 in [0.4 mm]. Friday Overcast with a high near 90°F [32°C]. W wind to around 10 mph [15 kph], with gusts to near 17 mph [27 kph]. Dewpoint near 75°F [24°C] with humidity of 94%. Pressure around 29.54 in [1000.5 mb]. UV Index: 7.75. Chance of precipitation 13% with QPF of 0.00 in [0.0 mm]. Friday Night Overcast with a low around 74°F [23°C]. W wind to around 10 mph [15 kph], with gusts to near 17 mph [27 kph]. Chance of precipitation 13% with QPF of 0.00 in [0.0 mm]. Saturday Overcast with a high near 93°F [34°C]. WSW wind to around 14 mph [22 kph], with gusts to near 22 mph [36 kph]. Dewpoint near 75°F [24°C] with humidity of 85%. Pressure around 29.54 in [1000.5 mb]. UV Index: 7.85. Chance of precipitation 34% with QPF of 0.00 in [0.0 mm]. Saturday Night Overcast with a low around 74°F [24°C]. WSW wind to around 14 mph [22 kph], with gusts to near 22 mph [36 kph]. Chance of precipitation 34% with QPF of 0.00 in [0.0 mm]. Sunday Thunderstorm with Hail with a high near 93°F [34°C]. NNW wind to around 9 mph [14 kph], with gusts to near 15 mph [23 kph]. Dewpoint near 75°F [24°C] with humidity of 95%. Pressure around 29.54 in [1000.5 mb]. UV Index: 7.85. Chance of precipitation 34% with QPF of 0.25 in [6.3 mm]. Sunday Night Thunderstorm with Hail with a low around 73°F [23°C]. NNW wind to around 9 mph [14 kph], with gusts to near 15 mph [23 kph]. Chance of precipitation 34% with QPF of 0.25 in [6.3 mm]. Monday Light Drizzle with a high near 96°F [36°C]. SSE wind to around 9 mph [15 kph], with gusts to near 24 mph [38 kph]. Dewpoint near 75°F [24°C] with humidity of 97%. Pressure around 29.54 in [1000.5 mb]. UV Index: 7.1. Chance of precipitation 6% with QPF of 0.02 in [0.6 mm]. Monday Night Light Drizzle with a low around 72°F [22°C]. SSE wind to around 9 mph [15 kph], with gusts to near 24 mph [38 kph]. Chance of precipitation 6% with QPF of 0.02 in [0.6 mm]. Tuesday Overcast with a high near 101°F [38°C]. WNW wind to around 21 mph [33 kph], with gusts to near 31 mph [50 kph]. Dewpoint near 75°F [24°C] with humidity of 85%. Pressure around 29.54 in [1000.5 mb]. UV Index: 7.8. Chance of precipitation 4% with QPF of 0.00 in [0.0 mm]. Tuesday Night Overcast with a low around 68°F [20°C]. WNW wind to around 21 mph [33 kph], with gusts to near 31 mph [50 kph]. Chance of precipitation 4% with QPF of 0.00 in [0.0 mm]. Wednesday Overcast with a high near 73°F [23°C]. NNE wind to around 11 mph [18 kph], with gusts to near 28 mph [44 kph]. Dewpoint near 75°F [24°C] with humidity of 89%. Pressure around 29.54 in [1000.5 mb]. UV Index: 7.3. Chance of precipitation 3% with QPF of 0.00 in [0.0 mm]. Wednesday Night Overcast with a low around 61°F [16°C]. NNE wind to around 11 mph [18 kph], with gusts to near 28 mph [44 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 Marissa, IL

Tonight: 0.4 mm | 0.02 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: 6.3 mm | 0.25 in

Sunday Night: 6.3 mm | 0.25 in

Monday: 0.6 mm | 0.02 in

Monday Night: 0.6 mm | 0.02 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

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

Tonight: SW @ 16 kph | 10 mph

Friday: W @ 15 kph | 10 mph

Friday Night: W @ 15 kph | 10 mph

Saturday: WSW @ 22 kph | 14 mph

Saturday Night: WSW @ 22 kph | 14 mph

Sunday: NNW @ 14 kph | 9 mph

Sunday Night: NNW @ 14 kph | 9 mph

Monday: SSE @ 15 kph | 9 mph

Monday Night: SSE @ 15 kph | 9 mph

Tuesday: WNW @ 33 kph | 21 mph

Tuesday Night: WNW @ 33 kph | 21 mph

Wednesday: NNE @ 18 kph | 11 mph

Wednesday Night: NNE @ 18 kph | 11 mph

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

Tonight: 98 %

Friday: 94 %

Friday Night: 94 %

Saturday: 85 %

Saturday Night: 85 %

Sunday: 95 %

Sunday Night: 95 %

Monday: 97 %

Monday Night: 97 %

Tuesday: 85 %

Tuesday Night: 85 %

Wednesday: 89 %

Wednesday Night: 89 %

7 Day and Night - Snowfall Totals Forecast for Marissa, 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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