Chambersburg, Illinois 7 Day & Night Forecast & Conditions

Current Conditions

Maps Alerts Climate Index

Clear 90°F 32°C Heat Index: 98°F	Observed at: Chambersburg, IL	Elevation: 716 ft | 218 m
	Last Updated: July 27, 8:00 PM Timezone: GMT -5/-4
	Sky Conditions: Clear	Temperature: 90°F | 32°C
	Pressure: 29.21 in | 989.2 mb	Dewpoint: 72°F | 22°C
	Humidity: 56%	Wind: WSW 10 mph | WSW 16 kph
	Feels Like: 95°F | 35°C	Visibility: 66.5 mi | 107 km
	Lat/Long: 39.8172 | -90.6572	Sunrise: 5:57 AM   Sunset: 8:20 PM

7 Day Graphical Forecast

Valid: 6:54 AM 7/29/2026

Today Overcast 95 |79 °F 35 |26 °C 10% Chance Precipitation Tuesday Overcast 94 |77 °F 34 |25 °C 3% Chance Precipitation Wednesday Overcast 86 |66 °F 30 |19 °C 2% Chance Precipitation Thursday Overcast 89 |64 °F 31 |18 °C 2% Chance Precipitation Friday Heavy Showers 78 |63 °F 26 |17 °C 52% Chance Precipitation Saturday Thunderstorm 83 |64 °F 28 |18 °C 52% Chance Precipitation Sunday Light Drizzle 86 |66 °F 30 |19 °C 14% Chance Precipitation

7 Hour Graphical Forecast

Valid: 6:54 AM 7/29/2026

6 AM Clear 66 °F 2% Chance Precipitation

7 AM Clear 67 °F 0% Chance Precipitation

8 AM Clear 71 °F 0% Chance Precipitation

9 AM Clear 74 °F 0% Chance Precipitation

10 AM Clear 78 °F 0% Chance Precipitation

11 AM Clear 81 °F 0% Chance Precipitation

12 PM Clear 83 °F 0% Chance Precipitation

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

7 Day & Night Weather Forecast for Chambersburg, IL - (Fahrenheit & Celsius) Valid: 6:54 AM 7/29/2026 Today Overcast with a high near 95°F [35°C]. SW wind to around 14 mph [23 kph], with gusts to near 20 mph [32 kph]. Dewpoint near 72°F [22°C] with humidity of 91%. Pressure around 29.21 in [989.2 mb]. UV Index: 7.7. Chance of precipitation 10% with QPF of 0.00 in [0.0 mm]. Tonight Overcast with a low around 79°F [26°C]. SW wind to around 14 mph [23 kph], with gusts to near 20 mph [32 kph]. Chance of precipitation 10% with QPF of 0.00 in [0.0 mm]. Tuesday Overcast with a high near 94°F [34°C]. NNE wind to around 11 mph [17 kph], with gusts to near 17 mph [28 kph]. Dewpoint near 72°F [22°C] with humidity of 90%. Pressure around 29.21 in [989.2 mb]. UV Index: 7.65. Chance of precipitation 3% with QPF of 0.00 in [0.0 mm]. Tuesday Night Overcast with a low around 77°F [25°C]. NNE wind to around 11 mph [17 kph], with gusts to near 17 mph [28 kph]. Chance of precipitation 3% with QPF of 0.00 in [0.0 mm]. Wednesday Overcast with a high near 86°F [30°C]. E wind to around 9 mph [15 kph], with gusts to near 19 mph [31 kph]. Dewpoint near 72°F [22°C] with humidity of 86%. Pressure around 29.21 in [989.2 mb]. UV Index: 7.65. Chance of precipitation 2% with QPF of 0.00 in [0.0 mm]. Wednesday Night Overcast with a low around 66°F [19°C]. E wind to around 9 mph [15 kph], with gusts to near 19 mph [31 kph]. Chance of precipitation 2% with QPF of 0.00 in [0.0 mm]. Thursday Overcast with a high near 89°F [31°C]. SSE wind to around 12 mph [19 kph], with gusts to near 25 mph [40 kph]. Dewpoint near 72°F [22°C] with humidity of 93%. Pressure around 29.21 in [989.2 mb]. UV Index: 7.55. Chance of precipitation 2% with QPF of 0.00 in [0.0 mm]. Thursday Night Overcast with a low around 64°F [18°C]. SSE wind to around 12 mph [19 kph], with gusts to near 25 mph [40 kph]. Chance of precipitation 2% with QPF of 0.00 in [0.0 mm]. Friday Heavy Showers with a high near 78°F [26°C]. ESE wind to around 16 mph [25 kph], with gusts to near 28 mph [45 kph]. Dewpoint near 72°F [22°C] with humidity of 98%. Pressure around 29.21 in [989.2 mb]. UV Index: 0.45. Chance of precipitation 52% with QPF of 1.37 in [34.9 mm]. Friday Night Heavy Showers with a low around 63°F [17°C]. ESE wind to around 16 mph [25 kph], with gusts to near 28 mph [45 kph]. Chance of precipitation 52% with QPF of 1.37 in [34.9 mm]. Saturday Thunderstorm with a high near 83°F [28°C]. NNE wind to around 16 mph [25 kph], with gusts to near 22 mph [36 kph]. Dewpoint near 72°F [22°C] with humidity of 98%. Pressure around 29.21 in [989.2 mb]. UV Index: 6.75. Chance of precipitation 52% with QPF of 0.10 in [2.5 mm]. Saturday Night Thunderstorm with a low around 64°F [18°C]. NNE wind to around 16 mph [25 kph], with gusts to near 22 mph [36 kph]. Chance of precipitation 52% with QPF of 0.10 in [2.5 mm]. Sunday Light Drizzle with a high near 86°F [30°C]. NNE wind to around 8 mph [13 kph], with gusts to near 16 mph [26 kph]. Dewpoint near 72°F [22°C] with humidity of 97%. Pressure around 29.21 in [989.2 mb]. UV Index: 7.35. Chance of precipitation 14% with QPF of 0.01 in [0.2 mm]. Sunday Night Light Drizzle with a low around 66°F [19°C]. NNE wind to around 8 mph [13 kph], with gusts to near 16 mph [26 kph]. Chance of precipitation 14% with QPF of 0.01 in [0.2 mm].

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7 Day and Night - QPF Forecast for Chambersburg, 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: 34.9 mm | 1.37 in

Friday Night: 34.9 mm | 1.37 in

Saturday: 2.5 mm | 0.10 in

Saturday Night: 2.5 mm | 0.10 in

Sunday: 0.2 mm | 0.01 in

Sunday Night: 0.2 mm | 0.01 in

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

Today: SW @ 23 kph | 14 mph

Tonight: SW @ 23 kph | 14 mph

Tuesday: NNE @ 17 kph | 11 mph

Tuesday Night: NNE @ 17 kph | 11 mph

Wednesday: E @ 15 kph | 9 mph

Wednesday Night: E @ 15 kph | 9 mph

Thursday: SSE @ 19 kph | 12 mph

Thursday Night: SSE @ 19 kph | 12 mph

Friday: ESE @ 25 kph | 16 mph

Friday Night: ESE @ 25 kph | 16 mph

Saturday: NNE @ 25 kph | 16 mph

Saturday Night: NNE @ 25 kph | 16 mph

Sunday: NNE @ 13 kph | 8 mph

Sunday Night: NNE @ 13 kph | 8 mph

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

Today: 91 %

Tonight: 91 %

Tuesday: 90 %

Tuesday Night: 90 %

Wednesday: 86 %

Wednesday Night: 86 %

Thursday: 93 %

Thursday Night: 93 %

Friday: 98 %

Friday Night: 98 %

Saturday: 98 %

Saturday Night: 98 %

Sunday: 97 %

Sunday Night: 97 %

7 Day and Night - Snowfall Totals Forecast for Chambersburg, 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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