Marion, Illinois 7 Day & Night Forecast & Conditions

Current Conditions

Maps Alerts Climate Index

Clear 79°F 26°C Heat Index: 79°F	Observed at: Marion, IL	Elevation: 420 ft | 128 m
	Last Updated: July 16, 10:15 PM Timezone: GMT -5/-4
	Sky Conditions: Clear	Temperature: 79°F | 26°C
	Pressure: 29.59 in | 1001.9 mb	Dewpoint: 75°F | 24°C
	Humidity: 87%	Wind: W 3 mph | W 5 kph
	Feels Like: 89°F | 32°C	Visibility: 31.2 mi | 50.2 km
	Lat/Long: 37.7306 | -88.9331	Sunrise: 5:47 AM   Sunset: 8:16 PM

7 Day Graphical Forecast

Valid: 10:27 PM 7/16/2026

Tonight Overcast 71 °F 20% Chance Precipitation Friday Overcast 88 |74 °F 14% Chance Precipitation Saturday Overcast 90 |74 °F 32% Chance Precipitation Sunday Light Showers 94 |73 °F 45% Chance Precipitation Monday Showers 93 |71 °F 10% Chance Precipitation Tuesday Overcast 102 |73 °F 11% Chance Precipitation Wednesday Overcast 77 |61 °F 4% Chance Precipitation

7 Hour Graphical Forecast

Valid: 10:27 PM 7/16/2026

10 PM Clear 80 °F 6% Chance Precipitation

11 PM Clear 79 °F 4% Chance Precipitation

12 AM Clear 78 °F 3% Chance Precipitation

1 AM Clear 77 °F 3% Chance Precipitation

2 AM Clear 77 °F 3% Chance Precipitation

3 AM Clear 76 °F 3% Chance Precipitation

4 AM Clear 75 °F 3% Chance Precipitation

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

7 Day & Night Weather Forecast for Marion, IL - (Fahrenheit & Celsius) Valid: 10:27 PM 7/16/2026 Tonight Overcast with a low around 71°F [22°C]. SW wind to around 7 mph [11 kph], with gusts to near 10 mph [16 kph]. Chance of precipitation 20% with QPF of 0.00 in [0.0 mm]. Friday Overcast with a high near 88°F [31°C]. WSW wind to around 8 mph [13 kph], with gusts to near 14 mph [23 kph]. Dewpoint near 75°F [24°C] with humidity of 96%. Pressure around 29.59 in [1001.9 mb]. UV Index: 7.75. Chance of precipitation 14% with QPF of 0.00 in [0.0 mm]. Friday Night Overcast with a low around 74°F [24°C]. WSW wind to around 8 mph [13 kph], with gusts to near 14 mph [23 kph]. Chance of precipitation 14% with QPF of 0.00 in [0.0 mm]. Saturday Overcast with a high near 90°F [32°C]. WSW wind to around 12 mph [20 kph], with gusts to near 20 mph [32 kph]. Dewpoint near 75°F [24°C] with humidity of 85%. Pressure around 29.59 in [1001.9 mb]. UV Index: 7.8. Chance of precipitation 32% with QPF of 0.00 in [0.0 mm]. Saturday Night Overcast with a low around 74°F [23°C]. WSW wind to around 12 mph [20 kph], with gusts to near 20 mph [32 kph]. Chance of precipitation 32% with QPF of 0.00 in [0.0 mm]. Sunday Light Showers with a high near 94°F [34°C]. NW wind to around 9 mph [14 kph], with gusts to near 14 mph [23 kph]. Dewpoint near 75°F [24°C] with humidity of 96%. Pressure around 29.59 in [1001.9 mb]. UV Index: 7.8. Chance of precipitation 45% with QPF of 0.16 in [4.0 mm]. Sunday Night Light Showers with a low around 73°F [23°C]. NW wind to around 9 mph [14 kph], with gusts to near 14 mph [23 kph]. Chance of precipitation 45% with QPF of 0.16 in [4.0 mm]. Monday Showers with a high near 93°F [34°C]. SSE wind to around 8 mph [12 kph], with gusts to near 18 mph [29 kph]. Dewpoint near 75°F [24°C] with humidity of 97%. Pressure around 29.59 in [1001.9 mb]. UV Index: 7.65. Chance of precipitation 10% with QPF of 0.28 in [7.0 mm]. Monday Night Showers with a low around 71°F [22°C]. SSE wind to around 8 mph [12 kph], with gusts to near 18 mph [29 kph]. Chance of precipitation 10% with QPF of 0.28 in [7.0 mm]. Tuesday Overcast with a high near 102°F [39°C]. WSW wind to around 16 mph [26 kph], with gusts to near 27 mph [44 kph]. Dewpoint near 75°F [24°C] with humidity of 83%. Pressure around 29.59 in [1001.9 mb]. UV Index: 7.6. Chance of precipitation 11% with QPF of 0.00 in [0.0 mm]. Tuesday Night Overcast with a low around 73°F [23°C]. WSW wind to around 16 mph [26 kph], with gusts to near 27 mph [44 kph]. Chance of precipitation 11% with QPF of 0.00 in [0.0 mm]. Wednesday Overcast with a high near 77°F [25°C]. NNE wind to around 12 mph [19 kph], with gusts to near 25 mph [41 kph]. Dewpoint near 75°F [24°C] with humidity of 87%. Pressure around 29.59 in [1001.9 mb]. UV Index: 7.4. Chance of precipitation 4% with QPF of 0.00 in [0.0 mm]. Wednesday Night Overcast with a low around 61°F [16°C]. NNE wind to around 12 mph [19 kph], with gusts to near 25 mph [41 kph]. Chance of precipitation 4% with QPF of 0.00 in [0.0 mm].

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7 Day and Night - QPF Forecast for Marion, IL

Tonight: 0.0 mm | 0.00 in

Friday: 0.0 mm | 0.00 in

Friday Night: 0.0 mm | 0.00 in

Saturday: 0.0 mm | 0.00 in

Saturday Night: 0.0 mm | 0.00 in

Sunday: 4.0 mm | 0.16 in

Sunday Night: 4.0 mm | 0.16 in

Monday: 7.0 mm | 0.28 in

Monday Night: 7.0 mm | 0.28 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 Marion, IL

Tonight: SW @ 11 kph | 7 mph

Friday: WSW @ 13 kph | 8 mph

Friday Night: WSW @ 13 kph | 8 mph

Saturday: WSW @ 20 kph | 12 mph

Saturday Night: WSW @ 20 kph | 12 mph

Sunday: NW @ 14 kph | 9 mph

Sunday Night: NW @ 14 kph | 9 mph

Monday: SSE @ 12 kph | 8 mph

Monday Night: SSE @ 12 kph | 8 mph

Tuesday: WSW @ 26 kph | 16 mph

Tuesday Night: WSW @ 26 kph | 16 mph

Wednesday: NNE @ 19 kph | 12 mph

Wednesday Night: NNE @ 19 kph | 12 mph

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

Tonight: 98 %

Friday: 96 %

Friday Night: 96 %

Saturday: 85 %

Saturday Night: 85 %

Sunday: 96 %

Sunday Night: 96 %

Monday: 97 %

Monday Night: 97 %

Tuesday: 83 %

Tuesday Night: 83 %

Wednesday: 87 %

Wednesday Night: 87 %

7 Day and Night - Snowfall Totals Forecast for Marion, 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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