Mechanicsburg, Illinois 7 Day & Night Forecast & Conditions

Current Conditions

Maps Alerts Climate Index

Clear 77°F 25°C Heat Index: 77°F	Observed at: Mechanicsburg, IL	Elevation: 715 ft | 218 m
	Last Updated: July 16, 10:30 PM Timezone: GMT -5/-4
	Sky Conditions: Clear	Temperature: 77°F | 25°C
	Pressure: 29.39 in | 995.4 mb	Dewpoint: 73°F | 23°C
	Humidity: 87%	Wind: E 3 mph | E 5 kph
	Feels Like: 86°F | 30°C	Visibility: 30 mi | 48.2 km
	Lat/Long: 39.8094 | -89.3972	Sunrise: 5:43 AM   Sunset: 8:24 PM

7 Day Graphical Forecast

Valid: 10:39 PM 7/16/2026

Tonight Overcast 71 °F 11% Chance Precipitation Friday Overcast 90 |74 °F 29% Chance Precipitation Saturday Light Showers 94 |75 °F 41% Chance Precipitation Sunday Light Showers 83 |70 °F 30% Chance Precipitation Monday Light Showers 88 |70 °F 8% Chance Precipitation Tuesday Overcast 88 |68 °F 18% Chance Precipitation Wednesday Partly Cloudy 72 |52 °F 3% Chance Precipitation

7 Hour Graphical Forecast

Valid: 10:39 PM 7/16/2026

10 PM Clear 78 °F 2% Chance Precipitation

11 PM Clear 77 °F 4% Chance Precipitation

12 AM Clear 76 °F 4% Chance Precipitation

1 AM Clear 76 °F 5% Chance Precipitation

2 AM Clear 75 °F 4% Chance Precipitation

3 AM Clear 74 °F 4% Chance Precipitation

4 AM Mostly Clear 74 °F 5% Chance Precipitation

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

7 Day & Night Weather Forecast for Mechanicsburg, IL - (Fahrenheit & Celsius) Valid: 10:39 PM 7/16/2026 Tonight Overcast with a low around 71°F [22°C]. SSE wind to around 5 mph [7 kph], with gusts to near 8 mph [13 kph]. Chance of precipitation 11% with QPF of 0.00 in [0.0 mm]. Friday Overcast with a high near 90°F [32°C]. WSW wind to around 11 mph [17 kph], with gusts to near 17 mph [27 kph]. Dewpoint near 73°F [23°C] with humidity of 96%. Pressure around 29.39 in [995.4 mb]. UV Index: 7.4. Chance of precipitation 29% with QPF of 0.00 in [0.0 mm]. Friday Night Overcast with a low around 74°F [23°C]. WSW wind to around 11 mph [17 kph], with gusts to near 17 mph [27 kph]. Chance of precipitation 29% with QPF of 0.00 in [0.0 mm]. Saturday Light Showers with a high near 94°F [34°C]. W wind to around 14 mph [23 kph], with gusts to near 29 mph [47 kph]. Dewpoint near 73°F [23°C] with humidity of 92%. Pressure around 29.39 in [995.4 mb]. UV Index: 7.7. Chance of precipitation 41% with QPF of 0.07 in [1.9 mm]. Saturday Night Light Showers with a low around 75°F [24°C]. W wind to around 14 mph [23 kph], with gusts to near 29 mph [47 kph]. Chance of precipitation 41% with QPF of 0.07 in [1.9 mm]. Sunday Light Showers with a high near 83°F [29°C]. E wind to around 8 mph [13 kph], with gusts to near 17 mph [27 kph]. Dewpoint near 73°F [23°C] with humidity of 97%. Pressure around 29.39 in [995.4 mb]. UV Index: 7.75. Chance of precipitation 30% with QPF of 0.11 in [2.7 mm]. Sunday Night Light Showers with a low around 70°F [21°C]. E wind to around 8 mph [13 kph], with gusts to near 17 mph [27 kph]. Chance of precipitation 30% with QPF of 0.11 in [2.7 mm]. Monday Light Showers with a high near 88°F [31°C]. S wind to around 10 mph [15 kph], with gusts to near 26 mph [42 kph]. Dewpoint near 73°F [23°C] with humidity of 92%. Pressure around 29.39 in [995.4 mb]. UV Index: 7.65. Chance of precipitation 8% with QPF of 0.25 in [6.3 mm]. Monday Night Light Showers with a low around 70°F [21°C]. S wind to around 10 mph [15 kph], with gusts to near 26 mph [42 kph]. Chance of precipitation 8% with QPF of 0.25 in [6.3 mm]. Tuesday Overcast with a high near 88°F [31°C]. WNW wind to around 20 mph [32 kph], with gusts to near 36 mph [58 kph]. Dewpoint near 73°F [23°C] with humidity of 86%. Pressure around 29.39 in [995.4 mb]. UV Index: 7.05. Chance of precipitation 18% with QPF of 0.00 in [0.0 mm]. Tuesday Night Overcast with a low around 68°F [20°C]. WNW wind to around 20 mph [32 kph], with gusts to near 36 mph [58 kph]. Chance of precipitation 18% with QPF of 0.00 in [0.0 mm]. Wednesday Partly Cloudy with a high near 72°F [22°C]. NNE wind to around 13 mph [20 kph], with gusts to near 26 mph [42 kph]. Dewpoint near 73°F [23°C] with humidity of 89%. Pressure around 29.39 in [995.4 mb]. UV Index: 7.55. Chance of precipitation 3% with QPF of 0.00 in [0.0 mm]. Wednesday Night Partly Cloudy with a low around 52°F [11°C]. NNE wind to around 13 mph [20 kph], with gusts to near 26 mph [42 kph]. Chance of precipitation 3% with QPF of 0.00 in [0.0 mm].

---

7 Day and Night - QPF Forecast for Mechanicsburg, IL

Tonight: 0.0 mm | 0.00 in

Friday: 0.0 mm | 0.00 in

Friday Night: 0.0 mm | 0.00 in

Saturday: 1.9 mm | 0.07 in

Saturday Night: 1.9 mm | 0.07 in

Sunday: 2.7 mm | 0.11 in

Sunday Night: 2.7 mm | 0.11 in

Monday: 6.3 mm | 0.25 in

Monday Night: 6.3 mm | 0.25 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 Mechanicsburg, IL

Tonight: SSE @ 7 kph | 5 mph

Friday: WSW @ 17 kph | 11 mph

Friday Night: WSW @ 17 kph | 11 mph

Saturday: W @ 23 kph | 14 mph

Saturday Night: W @ 23 kph | 14 mph

Sunday: E @ 13 kph | 8 mph

Sunday Night: E @ 13 kph | 8 mph

Monday: S @ 15 kph | 10 mph

Monday Night: S @ 15 kph | 10 mph

Tuesday: WNW @ 32 kph | 20 mph

Tuesday Night: WNW @ 32 kph | 20 mph

Wednesday: NNE @ 20 kph | 13 mph

Wednesday Night: NNE @ 20 kph | 13 mph

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

Tonight: 93 %

Friday: 96 %

Friday Night: 96 %

Saturday: 92 %

Saturday Night: 92 %

Sunday: 97 %

Sunday Night: 97 %

Monday: 92 %

Monday Night: 92 %

Tuesday: 86 %

Tuesday Night: 86 %

Wednesday: 89 %

Wednesday Night: 89 %

7 Day and Night - Snowfall Totals Forecast for Mechanicsburg, 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

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