McHenry, Illinois 7 Day & Night Forecast & Conditions

Current Conditions

Maps Alerts Climate Index

Partly Cloudy 73°F 23°C Heat Index: 73°F	Observed at: McHenry, IL	Elevation: 1000 ft | 305 m
	Last Updated: July 16, 10:30 PM Timezone: GMT -5/-4
	Sky Conditions: Partly Cloudy	Temperature: 73°F | 23°C
	Pressure: 29.23 in | 990 mb	Dewpoint: 63°F | 17°C
	Humidity: 72%	Wind: ENE 5 mph | ENE 8 kph
	Feels Like: 76°F | 24°C	Visibility: 16.3 mi | 26.2 km
	Lat/Long: 42.3447 | -88.2739	Sunrise: 5:31 AM   Sunset: 8:27 PM

7 Day Graphical Forecast

Valid: 10:34 PM 7/16/2026

Tonight Overcast 71 °F 7% Chance Precipitation Friday Overcast 94 |69 °F 18% Chance Precipitation Saturday Overcast 88 |67 °F 20% Chance Precipitation Sunday Overcast 80 |63 °F 10% Chance Precipitation Monday Overcast 83 |63 °F 42% Chance Precipitation Tuesday Showers 79 |58 °F 42% Chance Precipitation Wednesday Mostly Clear 72 |49 °F 4% Chance Precipitation

7 Hour Graphical Forecast

Valid: 10:34 PM 7/16/2026

10 PM Clear 74 °F 4% Chance Precipitation

11 PM Overcast 73 °F 6% Chance Precipitation

12 AM Overcast 72 °F 8% Chance Precipitation

1 AM Overcast 71 °F 4% Chance Precipitation

2 AM Overcast 71 °F 2% Chance Precipitation

3 AM Mostly Clear 70 °F 1% Chance Precipitation

4 AM Clear 70 °F 2% 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: 10:34 PM 7/16/2026 Tonight Overcast with a low around 71°F [22°C]. ENE wind to around 11 mph [18 kph], with gusts to near 14 mph [22 kph]. Chance of precipitation 7% with QPF of 0.00 in [0.0 mm]. Friday Overcast with a high near 94°F [34°C]. SW wind to around 11 mph [17 kph], with gusts to near 16 mph [26 kph]. Dewpoint near 63°F [17°C] with humidity of 93%. Pressure around 29.23 in [990 mb]. UV Index: 7.45. Chance of precipitation 18% with QPF of 0.00 in [0.0 mm]. Friday Night Overcast with a low around 69°F [21°C]. SW wind to around 11 mph [17 kph], with gusts to near 16 mph [26 kph]. Chance of precipitation 18% with QPF of 0.00 in [0.0 mm]. Saturday Overcast with a high near 88°F [31°C]. WNW wind to around 15 mph [25 kph], with gusts to near 28 mph [45 kph]. Dewpoint near 63°F [17°C] with humidity of 96%. Pressure around 29.23 in [990 mb]. UV Index: 7.25. Chance of precipitation 20% with QPF of 0.00 in [0.0 mm]. Saturday Night Overcast with a low around 67°F [19°C]. WNW wind to around 15 mph [25 kph], with gusts to near 28 mph [45 kph]. Chance of precipitation 20% with QPF of 0.00 in [0.0 mm]. Sunday Overcast with a high near 80°F [27°C]. ENE wind to around 7 mph [12 kph], with gusts to near 16 mph [26 kph]. Dewpoint near 63°F [17°C] with humidity of 95%. Pressure around 29.23 in [990 mb]. UV Index: 7.45. Chance of precipitation 10% with QPF of 0.00 in [0.0 mm]. Sunday Night Overcast with a low around 63°F [17°C]. ENE wind to around 7 mph [12 kph], with gusts to near 16 mph [26 kph]. Chance of precipitation 10% with QPF of 0.00 in [0.0 mm]. Monday Overcast with a high near 83°F [29°C]. SSW wind to around 15 mph [24 kph], with gusts to near 36 mph [57 kph]. Dewpoint near 63°F [17°C] with humidity of 97%. Pressure around 29.23 in [990 mb]. UV Index: 6.8. Chance of precipitation 42% with QPF of 0.00 in [0.0 mm]. Monday Night Overcast with a low around 63°F [17°C]. SSW wind to around 15 mph [24 kph], with gusts to near 36 mph [57 kph]. Chance of precipitation 42% with QPF of 0.00 in [0.0 mm]. Tuesday Showers with a high near 79°F [26°C]. NW wind to around 18 mph [30 kph], with gusts to near 38 mph [61 kph]. Dewpoint near 63°F [17°C] with humidity of 97%. Pressure around 29.23 in [990 mb]. UV Index: 6.25. Chance of precipitation 42% with QPF of 0.50 in [12.6 mm]. Tuesday Night Showers with a low around 58°F [14°C]. NW wind to around 18 mph [30 kph], with gusts to near 38 mph [61 kph]. Chance of precipitation 42% with QPF of 0.50 in [12.6 mm]. Wednesday Mostly Clear with a high near 72°F [22°C]. NNW wind to around 14 mph [23 kph], with gusts to near 29 mph [47 kph]. Dewpoint near 63°F [17°C] with humidity of 82%. Pressure around 29.23 in [990 mb]. UV Index: 7.2. Chance of precipitation 4% with QPF of 0.00 in [0.0 mm]. Wednesday Night Mostly Clear with a low around 49°F [10°C]. NNW wind to around 14 mph [23 kph], with gusts to near 29 mph [47 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 McHenry, 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: 0.0 mm | 0.00 in

Sunday Night: 0.0 mm | 0.00 in

Monday: 0.0 mm | 0.00 in

Monday Night: 0.0 mm | 0.00 in

Tuesday: 12.6 mm | 0.50 in

Tuesday Night: 12.6 mm | 0.50 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 McHenry, IL

Tonight: ENE @ 18 kph | 11 mph

Friday: SW @ 17 kph | 11 mph

Friday Night: SW @ 17 kph | 11 mph

Saturday: WNW @ 25 kph | 15 mph

Saturday Night: WNW @ 25 kph | 15 mph

Sunday: ENE @ 12 kph | 7 mph

Sunday Night: ENE @ 12 kph | 7 mph

Monday: SSW @ 24 kph | 15 mph

Monday Night: SSW @ 24 kph | 15 mph

Tuesday: NW @ 30 kph | 18 mph

Tuesday Night: NW @ 30 kph | 18 mph

Wednesday: NNW @ 23 kph | 14 mph

Wednesday Night: NNW @ 23 kph | 14 mph

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

Tonight: 88 %

Friday: 93 %

Friday Night: 93 %

Saturday: 96 %

Saturday Night: 96 %

Sunday: 95 %

Sunday Night: 95 %

Monday: 97 %

Monday Night: 97 %

Tuesday: 97 %

Tuesday Night: 97 %

Wednesday: 82 %

Wednesday Night: 82 %

7 Day and Night - Snowfall Totals Forecast for McHenry, 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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