McHenry, Illinois 7 Day & Night Forecast & Conditions

Current Conditions

Maps Alerts Climate Index

Clear 75°F 24°C Heat Index: 75°F	Observed at: McHenry, IL	Elevation: 1000 ft | 305 m
	Last Updated: July 27, 7:00 PM Timezone: GMT -5/-4
	Sky Conditions: Clear	Temperature: 75°F | 24°C
	Pressure: 28.87 in | 977.5 mb	Dewpoint: 71°F | 22°C
	Humidity: 88%	Wind: S 9 mph | S 14 kph
	Feels Like: 80°F | 27°C	Visibility: 30.4 mi | 48.9 km
	Lat/Long: 42.3447 | -88.2739	Sunrise: 5:41 AM   Sunset: 8:18 PM

7 Day Graphical Forecast

Valid: 5:32 AM 7/29/2026

Today Heavy Showers 84 |71 °F 29 |22 °C 35% Chance Precipitation Tuesday Overcast 76 |64 °F 25 |18 °C 0% Chance Precipitation Wednesday Clear 87 |59 °F 30 |15 °C 0% Chance Precipitation Thursday Overcast 88 |65 °F 31 |19 °C 6% Chance Precipitation Friday Drizzle 75 |65 °F 24 |19 °C 38% Chance Precipitation Saturday Overcast 89 |63 °F 32 |17 °C 41% Chance Precipitation Sunday Partly Cloudy 84 |61 °F 29 |16 °C 13% Chance Precipitation

7 Hour Graphical Forecast

Valid: 5:32 AM 7/29/2026

5 AM Clear 59 °F 0% Chance Precipitation

6 AM Clear 59 °F 0% Chance Precipitation

7 AM Clear 61 °F 0% Chance Precipitation

8 AM Clear 66 °F 0% Chance Precipitation

9 AM Clear 70 °F 0% Chance Precipitation

10 AM Clear 73 °F 0% Chance Precipitation

11 AM Clear 76 °F 0% Chance Precipitation

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

7 Day & Night Weather Forecast for McHenry, IL - (Fahrenheit & Celsius) Valid: 5:32 AM 7/29/2026 Today Heavy Showers with a high near 84°F [29°C]. S wind to around 20 mph [33 kph], with gusts to near 38 mph [61 kph]. Dewpoint near 71°F [22°C] with humidity of 98%. Pressure around 28.87 in [977.5 mb]. UV Index: 6.75. Chance of precipitation 35% with QPF of 2.38 in [60.4 mm]. Tonight Heavy Showers with a low around 71°F [22°C]. S wind to around 20 mph [33 kph], with gusts to near 38 mph [61 kph]. Chance of precipitation 35% with QPF of 2.38 in [60.4 mm]. Tuesday Overcast with a high near 76°F [25°C]. NNE wind to around 15 mph [23 kph], with gusts to near 30 mph [49 kph]. Dewpoint near 71°F [22°C] with humidity of 93%. Pressure around 28.87 in [977.5 mb]. UV Index: 7.3. Chance of precipitation 0% with QPF of 0.00 in [0.0 mm]. Tuesday Night Overcast with a low around 64°F [18°C]. NNE wind to around 15 mph [23 kph], with gusts to near 30 mph [49 kph]. Chance of precipitation 0% with QPF of 0.00 in [0.0 mm]. Wednesday Clear with a high near 87°F [30°C]. WNW wind to around 11 mph [17 kph], with gusts to near 17 mph [27 kph]. Dewpoint near 71°F [22°C] with humidity of 90%. Pressure around 28.87 in [977.5 mb]. UV Index: 7.3. Chance of precipitation 0% with QPF of 0.00 in [0.0 mm]. Wednesday Night Clear with a low around 59°F [15°C]. WNW wind to around 11 mph [17 kph], with gusts to near 17 mph [27 kph]. Chance of precipitation 0% with QPF of 0.00 in [0.0 mm]. Thursday Overcast with a high near 88°F [31°C]. W wind to around 14 mph [23 kph], with gusts to near 19 mph [31 kph]. Dewpoint near 71°F [22°C] with humidity of 94%. Pressure around 28.87 in [977.5 mb]. UV Index: 7.3. Chance of precipitation 6% with QPF of 0.00 in [0.0 mm]. Thursday Night Overcast with a low around 65°F [19°C]. W wind to around 14 mph [23 kph], with gusts to near 19 mph [31 kph]. Chance of precipitation 6% with QPF of 0.00 in [0.0 mm]. Friday Drizzle with a high near 75°F [24°C]. NW wind to around 10 mph [16 kph], with gusts to near 21 mph [33 kph]. Dewpoint near 71°F [22°C] with humidity of 96%. Pressure around 28.87 in [977.5 mb]. UV Index: 2.05. Chance of precipitation 38% with QPF of 0.08 in [2.1 mm]. Friday Night Drizzle with a low around 65°F [19°C]. NW wind to around 10 mph [16 kph], with gusts to near 21 mph [33 kph]. Chance of precipitation 38% with QPF of 0.08 in [2.1 mm]. Saturday Overcast with a high near 89°F [32°C]. NNE wind to around 12 mph [19 kph], with gusts to near 24 mph [38 kph]. Dewpoint near 71°F [22°C] with humidity of 96%. Pressure around 28.87 in [977.5 mb]. UV Index: 7.3. Chance of precipitation 41% with QPF of 0.00 in [0.0 mm]. Saturday Night Overcast with a low around 63°F [17°C]. NNE wind to around 12 mph [19 kph], with gusts to near 24 mph [38 kph]. Chance of precipitation 41% with QPF of 0.00 in [0.0 mm]. Sunday Partly Cloudy with a high near 84°F [29°C]. NNE wind to around 13 mph [21 kph], with gusts to near 26 mph [42 kph]. Dewpoint near 71°F [22°C] with humidity of 94%. Pressure around 28.87 in [977.5 mb]. UV Index: 7.1. Chance of precipitation 13% with QPF of 0.00 in [0.0 mm]. Sunday Night Partly Cloudy with a low around 61°F [16°C]. NNE wind to around 13 mph [21 kph], with gusts to near 26 mph [42 kph]. Chance of precipitation 13% with QPF of 0.00 in [0.0 mm].

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7 Day and Night - QPF Forecast for McHenry, IL

Today: 60.4 mm | 2.38 in

Tonight: 60.4 mm | 2.38 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: 2.1 mm | 0.08 in

Friday Night: 2.1 mm | 0.08 in

Saturday: 0.0 mm | 0.00 in

Saturday Night: 0.0 mm | 0.00 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 McHenry, IL

Today: S @ 33 kph | 20 mph

Tonight: S @ 33 kph | 20 mph

Tuesday: NNE @ 23 kph | 15 mph

Tuesday Night: NNE @ 23 kph | 15 mph

Wednesday: WNW @ 17 kph | 11 mph

Wednesday Night: WNW @ 17 kph | 11 mph

Thursday: W @ 23 kph | 14 mph

Thursday Night: W @ 23 kph | 14 mph

Friday: NW @ 16 kph | 10 mph

Friday Night: NW @ 16 kph | 10 mph

Saturday: NNE @ 19 kph | 12 mph

Saturday Night: NNE @ 19 kph | 12 mph

Sunday: NNE @ 21 kph | 13 mph

Sunday Night: NNE @ 21 kph | 13 mph

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

Today: 98 %

Tonight: 98 %

Tuesday: 93 %

Tuesday Night: 93 %

Wednesday: 90 %

Wednesday Night: 90 %

Thursday: 94 %

Thursday Night: 94 %

Friday: 96 %

Friday Night: 96 %

Saturday: 96 %

Saturday Night: 96 %

Sunday: 94 %

Sunday Night: 94 %

7 Day and Night - Snowfall Totals Forecast for McHenry, 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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