Percy, Illinois 7 Day & Night Forecast & Conditions

Current Conditions

Maps Alerts Climate Index

Overcast 88°F 31°C Heat Index: 99°F	Observed at: Percy, IL	Elevation: 482 ft | 147 m
	Last Updated: July 27, 8:00 PM Timezone: GMT -5/-4
	Sky Conditions: Overcast	Temperature: 88°F | 31°C
	Pressure: 29.27 in | 991.1 mb	Dewpoint: 76°F | 24°C
	Humidity: 67%	Wind: WSW 4 mph | WSW 6 kph
	Feels Like: 98°F | 37°C	Visibility: 52 mi | 83.7 km
	Lat/Long: 38.0164 | -89.6186	Sunrise: 5:57 AM   Sunset: 8:12 PM

7 Day Graphical Forecast

Valid: 11:34 AM 7/28/2026

Today Overcast 95 |76 °F 35 |25 °C 7% Chance Precipitation Tuesday Overcast 94 |79 °F 34 |26 °C 7% Chance Precipitation Wednesday Overcast 85 |68 °F 30 |20 °C 3% Chance Precipitation Thursday Overcast 88 |63 °F 31 |17 °C 1% Chance Precipitation Friday Light Showers 77 |67 °F 25 |19 °C 46% Chance Precipitation Saturday Light Showers 77 |67 °F 25 |19 °C 55% Chance Precipitation Sunday Clear 85 |63 °F 30 |17 °C 29% Chance Precipitation

7 Hour Graphical Forecast

Valid: 11:34 AM 7/28/2026

11 AM Partly Cloudy 90 °F 5% Chance Precipitation

12 PM Overcast 93 °F 4% Chance Precipitation

1 PM Clear 94 °F 2% Chance Precipitation

2 PM Overcast 94 °F 2% Chance Precipitation

3 PM Overcast 94 °F 2% Chance Precipitation

4 PM Overcast 93 °F 3% Chance Precipitation

5 PM Overcast 92 °F 3% Chance Precipitation

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

7 Day & Night Weather Forecast for Percy, IL - (Fahrenheit & Celsius) Valid: 11:34 AM 7/28/2026 Today Overcast with a high near 95°F [35°C]. SSW wind to around 12 mph [20 kph], with gusts to near 26 mph [42 kph]. Dewpoint near 76°F [24°C] with humidity of 96%. Pressure around 29.27 in [991.1 mb]. UV Index: 7.8. Chance of precipitation 7% with QPF of 0.00 in [0.0 mm]. Tonight Overcast with a low around 76°F [25°C]. SSW wind to around 12 mph [20 kph], with gusts to near 26 mph [42 kph]. Chance of precipitation 7% with QPF of 0.00 in [0.0 mm]. Tuesday Overcast with a high near 94°F [34°C]. NW wind to around 11 mph [17 kph], with gusts to near 24 mph [38 kph]. Dewpoint near 76°F [24°C] with humidity of 81%. Pressure around 29.27 in [991.1 mb]. UV Index: 7.7. Chance of precipitation 7% with QPF of 0.00 in [0.0 mm]. Tuesday Night Overcast with a low around 79°F [26°C]. NW wind to around 11 mph [17 kph], with gusts to near 24 mph [38 kph]. Chance of precipitation 7% with QPF of 0.00 in [0.0 mm]. Wednesday Overcast with a high near 85°F [30°C]. NE wind to around 11 mph [17 kph], with gusts to near 23 mph [37 kph]. Dewpoint near 76°F [24°C] with humidity of 87%. Pressure around 29.27 in [991.1 mb]. UV Index: 7.7. Chance of precipitation 3% with QPF of 0.00 in [0.0 mm]. Wednesday Night Overcast with a low around 68°F [20°C]. NE wind to around 11 mph [17 kph], with gusts to near 23 mph [37 kph]. Chance of precipitation 3% with QPF of 0.00 in [0.0 mm]. Thursday Overcast with a high near 88°F [31°C]. SSE wind to around 7 mph [12 kph], with gusts to near 12 mph [19 kph]. Dewpoint near 76°F [24°C] with humidity of 93%. Pressure around 29.27 in [991.1 mb]. UV Index: 7.7. Chance of precipitation 1% with QPF of 0.00 in [0.0 mm]. Thursday Night Overcast with a low around 63°F [17°C]. SSE wind to around 7 mph [12 kph], with gusts to near 12 mph [19 kph]. Chance of precipitation 1% with QPF of 0.00 in [0.0 mm]. Friday Light Showers with a high near 77°F [25°C]. SSE wind to around 15 mph [24 kph], with gusts to near 28 mph [46 kph]. Dewpoint near 76°F [24°C] with humidity of 98%. Pressure around 29.27 in [991.1 mb]. UV Index: 6.45. Chance of precipitation 46% with QPF of 0.49 in [12.4 mm]. Friday Night Light Showers with a low around 67°F [19°C]. SSE wind to around 15 mph [24 kph], with gusts to near 28 mph [46 kph]. Chance of precipitation 46% with QPF of 0.49 in [12.4 mm]. Saturday Light Showers with a high near 77°F [25°C]. NE wind to around 14 mph [22 kph], with gusts to near 24 mph [39 kph]. Dewpoint near 76°F [24°C] with humidity of 99%. Pressure around 29.27 in [991.1 mb]. UV Index: 5.5. Chance of precipitation 55% with QPF of 0.27 in [6.9 mm]. Saturday Night Light Showers with a low around 67°F [19°C]. NE wind to around 14 mph [22 kph], with gusts to near 24 mph [39 kph]. Chance of precipitation 55% with QPF of 0.27 in [6.9 mm]. Sunday Clear with a high near 85°F [30°C]. NNE wind to around 12 mph [19 kph], with gusts to near 20 mph [32 kph]. Dewpoint near 76°F [24°C] with humidity of 98%. Pressure around 29.27 in [991.1 mb]. UV Index: 7.45. Chance of precipitation 29% with QPF of 0.00 in [0.0 mm]. Sunday Night Clear with a low around 63°F [17°C]. NNE wind to around 12 mph [19 kph], with gusts to near 20 mph [32 kph]. Chance of precipitation 29% with QPF of 0.00 in [0.0 mm].

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7 Day and Night - QPF Forecast for Percy, IL

Today: 0.0 mm | 0.00 in

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: 12.4 mm | 0.49 in

Friday Night: 12.4 mm | 0.49 in

Saturday: 6.9 mm | 0.27 in

Saturday Night: 6.9 mm | 0.27 in

Sunday: 0.0 mm | 0.00 in

Sunday Night: 0.0 mm | 0.00 in

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

Today: SSW @ 20 kph | 12 mph

Tonight: SSW @ 20 kph | 12 mph

Tuesday: NW @ 17 kph | 11 mph

Tuesday Night: NW @ 17 kph | 11 mph

Wednesday: NE @ 17 kph | 11 mph

Wednesday Night: NE @ 17 kph | 11 mph

Thursday: SSE @ 12 kph | 7 mph

Thursday Night: SSE @ 12 kph | 7 mph

Friday: SSE @ 24 kph | 15 mph

Friday Night: SSE @ 24 kph | 15 mph

Saturday: NE @ 22 kph | 14 mph

Saturday Night: NE @ 22 kph | 14 mph

Sunday: NNE @ 19 kph | 12 mph

Sunday Night: NNE @ 19 kph | 12 mph

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

Today: 96 %

Tonight: 96 %

Tuesday: 81 %

Tuesday Night: 81 %

Wednesday: 87 %

Wednesday Night: 87 %

Thursday: 93 %

Thursday Night: 93 %

Friday: 98 %

Friday Night: 98 %

Saturday: 99 %

Saturday Night: 99 %

Sunday: 98 %

Sunday Night: 98 %

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

Today: 0.0 cm | 0.00 in

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

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