Current Conditions

Mount Prospect, Illinois

74°F24°C

Rain

Wind

SW 8 mph13 km/h

Humidity

67%

Cloud Cover

98%

As of Wednesday, September 9, 2026 at 1:06 AM CDT

Today's Outlook

Day

Overcast and warm, with a high of 79°F26°C and morning low of 71°F22°C. Breezy from the WSW at 9 to 10 mph15 to 16 km/h. 100% chance of rain throughout the day. Humid.

Night

Mostly cloudy, with a low around 73°F23°C. Breezy from the SW at 8 mph12 km/h. 59% chance of light rain before dawn.

7-Day Forecast

Condition	High (°F)	Low (°F)	Precip (mm)	Cloud Cover (%)	Wind (mph)
Rain	High 79°F26°C	Low 71°F22°C	Precip 0.48 in12.2 mm100%	Cloud 86%	Wind WSW 8 mph13 km/h	Wednesday: Overcast and warm, with a high of 79°F26°C and morning low of 71°F22°C. Breezy from the WSW at 9 to 10 mph15 to 16 km/h. 100% chance of rain throughout the day. Humid. Wednesday Night: Mostly cloudy, with a low around 73°F23°C. Breezy from the SW at 8 mph12 km/h. 59% chance of light rain before dawn.
Partly Cloudy	High 75°F24°C	Low 65°F18°C	Precip 0 in0 mm—	Cloud 68%	Wind NNE 6 mph10 km/h	Thursday: Overcast and warm, with a high of 75°F24°C and morning low of 67°F19°C. Light wind from the NNE around 7 mph10 km/h. Thursday Night: Mostly cloudy, with a low around 65°F18°C. Breezy from the NNW at 6 to 7 mph10 to 12 km/h.
Clear	High 79°F26°C	Low 61°F16°C	Precip 0 in0 mm—	Cloud 14%	Wind SE 6 mph9 km/h	Friday: Mostly clear and warm, with a high of 79°F26°C and morning low of 61°F16°C. Light wind from the SE around 6 mph9 km/h. Friday Night: Mostly clear, with a low around 62°F17°C. Breezy from the SE at 6 to 8 mph9 to 12 km/h.
Drizzle	High 83°F28°C	Low 66°F19°C	Precip 0.03 in0.8 mm20%	Cloud 49%	Wind SW 7 mph12 km/h	Saturday: Mostly cloudy and warm, with a high of 83°F28°C and morning low of 66°F19°C. Breezy from the SW at 8 to 10 mph13 to 15 km/h. 15% chance of drizzle in the afternoon. Humid. Saturday Night: Partly cloudy, with a low around 67°F19°C. Breezy from the SW at 7 to 8 mph11 to 13 km/h. 20% chance of drizzle in the evening.
Drizzle	High 73°F23°C	Low 64°F18°C	Precip 0.04 in1.1 mm12%	Cloud 37%	Wind N 8 mph13 km/h	Sunday: Partly cloudy and warm, with a high of 73°F23°C and morning low of 64°F18°C. Breezy from the NNW at 8 to 9 mph14 to 14 km/h. 12% chance of drizzle in the morning. Sunday Night: Partly cloudy, with a low around 64°F18°C. Breezy from the N at 7 to 8 mph12 to 13 km/h. 12% chance of drizzle throughout the night.
Showers	High 76°F24°C	Low 62°F16°C	Precip 0.13 in3.2 mm22%	Cloud 59%	Wind SE 10 mph16 km/h	Monday: Mostly cloudy and warm, with a high of 76°F24°C and morning low of 62°F16°C. Breezy from the SE at 10 to 12 mph16 to 19 km/h. 22% chance of showers throughout the day. Monday Night: Partly cloudy, with a low around 62°F17°C. Breezy from the SE at 10 to 14 mph16 to 22 km/h. 15% chance of drizzle throughout the night.
Light Rain	High 80°F27°C	Low 70°F21°C	Precip 0.18 in4.6 mm31%	Cloud 74%	Wind SW 11 mph17 km/h	Tuesday: Mostly cloudy and warm, with a high of 80°F27°C and morning low of 70°F21°C. Breezy from the SW at 11 to 12 mph18 to 19 km/h. 28% chance of light rain throughout the day. Tuesday Night: Mostly cloudy, with a low around 71°F22°C. Breezy from the SSW at 10 to 14 mph17 to 23 km/h. 31% chance of light rain throughout the night.

15-Day Forecast

	Day	High	Low	Precip	Cloud Cover	Condition	Wind
	WednesdaySep 9	79°F26°C	71°F22°C	0.48 in12.2 mm· 100%	86%	Rain	WSW 8 mph13 km/h
DayOvercast and warm, with a high of 79°F26°C and morning low of 71°F22°C. Breezy from the WSW at 9 to 10 mph15 to 16 km/h. 100% chance of rain throughout the day. Humid. NightMostly cloudy, with a low around 73°F23°C. Breezy from the SW at 8 mph12 km/h. 59% chance of light rain before dawn.
	ThursdaySep 10	75°F24°C	65°F18°C	0 in0 mm· —	68%	Partly Cloudy	NNE 6 mph10 km/h
DayOvercast and warm, with a high of 75°F24°C and morning low of 67°F19°C. Light wind from the NNE around 7 mph10 km/h. NightMostly cloudy, with a low around 65°F18°C. Breezy from the NNW at 6 to 7 mph10 to 12 km/h.
	FridaySep 11	79°F26°C	61°F16°C	0 in0 mm· —	14%	Clear	SE 6 mph9 km/h
DayMostly clear and warm, with a high of 79°F26°C and morning low of 61°F16°C. Light wind from the SE around 6 mph9 km/h. NightMostly clear, with a low around 62°F17°C. Breezy from the SE at 6 to 8 mph9 to 12 km/h.
	SaturdaySep 12	83°F28°C	66°F19°C	0.03 in0.8 mm· 20%	49%	Drizzle	SW 7 mph12 km/h
DayMostly cloudy and warm, with a high of 83°F28°C and morning low of 66°F19°C. Breezy from the SW at 8 to 10 mph13 to 15 km/h. 15% chance of drizzle in the afternoon. Humid. NightPartly cloudy, with a low around 67°F19°C. Breezy from the SW at 7 to 8 mph11 to 13 km/h. 20% chance of drizzle in the evening.
	SundaySep 13	73°F23°C	64°F18°C	0.04 in1.1 mm· 12%	37%	Drizzle	N 8 mph13 km/h
DayPartly cloudy and warm, with a high of 73°F23°C and morning low of 64°F18°C. Breezy from the NNW at 8 to 9 mph14 to 14 km/h. 12% chance of drizzle in the morning. NightPartly cloudy, with a low around 64°F18°C. Breezy from the N at 7 to 8 mph12 to 13 km/h. 12% chance of drizzle throughout the night.
	MondaySep 14	76°F24°C	62°F16°C	0.13 in3.2 mm· 22%	59%	Showers	SE 10 mph16 km/h
DayMostly cloudy and warm, with a high of 76°F24°C and morning low of 62°F16°C. Breezy from the SE at 10 to 12 mph16 to 19 km/h. 22% chance of showers throughout the day. NightPartly cloudy, with a low around 62°F17°C. Breezy from the SE at 10 to 14 mph16 to 22 km/h. 15% chance of drizzle throughout the night.
	TuesdaySep 15	80°F27°C	70°F21°C	0.18 in4.6 mm· 31%	74%	Light Rain	SW 11 mph17 km/h
DayMostly cloudy and warm, with a high of 80°F27°C and morning low of 70°F21°C. Breezy from the SW at 11 to 12 mph18 to 19 km/h. 28% chance of light rain throughout the day. NightMostly cloudy, with a low around 71°F22°C. Breezy from the SSW at 10 to 14 mph17 to 23 km/h. 31% chance of light rain throughout the night.
	WednesdaySep 16	76°F24°C	66°F19°C	0.24 in6.2 mm· 37%	71%	Light Rain	E 7 mph11 km/h
DayMostly cloudy and warm, with a high of 76°F24°C and morning low of 66°F19°C. Breezy from the E at 7 mph11 km/h. 30% chance of light rain throughout the day. NightMostly cloudy, with a low around 67°F19°C. Breezy from the E at 7 mph12 km/h. 37% chance of showers throughout the night.
	ThursdaySep 17	81°F27°C	69°F20°C	0.22 in5.6 mm· 25%	54%	Showers	SSW 9 mph15 km/h
DayMostly cloudy and warm, with a high of 81°F27°C and morning low of 69°F20°C. Breezy from the SW at 9 to 10 mph15 to 17 km/h. 25% chance of showers throughout the day. Humid. NightMostly cloudy, with a low around 70°F21°C. Breezy from the SSW at 9 to 10 mph14 to 15 km/h. 23% chance of showers throughout the night.
	FridaySep 18	75°F24°C	65°F19°C	0.19 in4.9 mm· 22%	49%	Showers	W 9 mph15 km/h
DayPartly cloudy and warm, with a high of 75°F24°C and morning low of 65°F19°C. Breezy from the W at 10 mph16 km/h. 19% chance of showers throughout the day. NightPartly cloudy, with a low around 66°F19°C. Breezy from the W at 9 to 10 mph15 to 16 km/h. 22% chance of showers throughout the night.
	SaturdaySep 19	71°F21°C	60°F16°C	0.2 in5.1 mm· 28%	55%	Showers	WNW 9 mph14 km/h
DayMostly cloudy and warm, with a high of 71°F21°C and morning low of 60°F16°C. Breezy from the WNW at 9 to 10 mph15 to 16 km/h. 24% chance of showers throughout the day. NightMostly cloudy, with a low around 62°F17°C. Breezy from the NW at 8 to 9 mph14 to 14 km/h. 28% chance of showers throughout the night.
	SundaySep 20	67°F19°C	57°F14°C	0.13 in3.4 mm· 20%	53%	Showers	N 9 mph15 km/h
DayMostly cloudy and mild, with a high of 67°F19°C and morning low of 57°F14°C. Breezy from the N at 9 to 10 mph15 to 16 km/h. 19% chance of drizzle throughout the day. Dry air. NightMostly cloudy, with a low around 58°F15°C. Breezy from the N at 9 mph14 km/h. 20% chance of showers throughout the night.
	MondaySep 21	67°F19°C	55°F13°C	0.1 in2.6 mm· 14%	52%	Drizzle	NE 8 mph13 km/h
DayMostly cloudy and mild, with a high of 67°F19°C and morning low of 55°F13°C. Breezy from the NE at 8 mph13 km/h. 14% chance of drizzle throughout the day. Dry air. NightPartly cloudy, with a low around 56°F13°C. Breezy from the NE at 8 mph12 km/h. 12% chance of drizzle throughout the night.
	TuesdaySep 22	68°F20°C	55°F13°C	0.09 in2.2 mm· 13%	54%	Drizzle	E 8 mph13 km/h
DayMostly cloudy and warm, with a high of 68°F20°C and morning low of 55°F13°C. Breezy from the ESE at 9 mph14 km/h. 13% chance of drizzle throughout the day. Dry air. NightMostly cloudy, with a low around 56°F13°C. Breezy from the E at 8 mph13 km/h. 12% chance of drizzle throughout the night.
	WednesdaySep 23	68°F20°C	56°F14°C	0.13 in3.4 mm· 18%	57%	Showers	ESE 8 mph13 km/h
DayMostly cloudy and warm, with a high of 68°F20°C and morning low of 56°F14°C. Breezy from the ESE at 8 to 9 mph13 to 15 km/h. 18% chance of showers throughout the day. NightMostly cloudy, with a low around 58°F14°C. Breezy from the ESE at 8 mph12 km/h. 16% chance of showers throughout the night.

Nearby Cities

Prospect Heights2 mi3 km Arlington Heights3 mi4 km Des Plaines4 mi6 km Rolling Meadows4 mi7 km Elk Grove Village5 mi7 km Wheeling5 mi8 km

About This Forecast

This forecast is powered by WeatherMesh, the world's most advanced and accurate weather model powered by AI. WeatherMesh is built on proprietary data from WindBorne's Global Sounding Balloon constellation — the world's largest fleet of autonomous, long-duration weather balloons — collecting observations across 100% of Earth, including over oceans and remote regions where no other data exists.

WeatherMesh consistently outperforms legacy models in independent benchmarks. View Benchmarks →

Access WeatherMesh forecasts programmatically via our API. API Documentation →

How to Access Weather Forecasts

Pattern	Example	Description
/weather/{country}/{city}/	/weather/united-states/san-francisco/	City forecast (canonical URL)
/weather/{city}/	/weather/tokyo/	Shorthand — redirects to most populous match
/weather/{country}/{region}/{city}/	/weather/united-states/california/san-francisco/	With region — redirects to canonical
/weather/nearby?lat={lat}&lon={lon}	/weather/nearby?lat=48.1&lon=11.5	Find nearest city by coordinates
/weather/{country}/	/weather/germany/	Country index — all cities by region

Country and city names use lowercase slugs with hyphens (e.g. united-states, san-francisco). Arbitrary city names are supported — if not in our database, we geocode the name and serve the forecast for that location.

For programmatic access, use theWindBorne Forecast APIwhich returns structured JSON for any coordinates worldwide.

Coordinates: 42.0664°N, 87.9373°W·Elevation: 204m·Timezone: America/Chicago·Population: 54,747