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Mount Prospect IL Weather - Clear - 77°F
Clear
77°F
Updated 5:47 am
Feels Like 79°F
Humidity 87%
Wind N 0 mph
Barometer  29.9 in
Dew Point 73°F
Mount Prospect IL Weather - Clear - 25°C
Clear
25°C
Updated 5:47 am
Feels Like 26°C
Humidity 87%
Wind N 0 km/h
Barometer  101.2 kPa
Dew Point 23°C
Mount Prospect, IL Weather and Current Conditionsmount prospect il weather forecast

Mount Prospect, IL Weather Forecast

Mount Prospect Illinois WeatherMount Prospect, Illinois Weather Weather Forecast
14 day API Mount Prospect, IL weather forecast. Note. Our 7-day weather forecast for Mount Prospect, Illinois is our most reliable and accurate forecast. This model should only be used as a likely scenario. Forecasting more than 7 days is difficult.
Mount Prospect, IL Weather Forecast Dated: 547 AM Fri Sep 04 2026
Expect a very warm period with a mix of sun and clouds and occasional showers over the coming period. moderate humidity and no major pressure swings will dominate. Isolated storms at times.

Friday, September 4, 2026

Mid-Morning
Mount Prospect Weather - 2026-09-04 - Morning - Overcast
82°F 28°C
Overcast
Mid-Afternoon
Mount Prospect Weather - 2026-09-04 - Afternoon - Nearby Thunderstorms
92°F 34°C
Nearby Thunderstorms
Early-Evening
Mount Prospect Weather - 2026-09-04 - Evening - Sunny
83°F 29°C
Sunny
Sizzling hot near 92°F 34°C with a heat index reaching 98°F 36°C, periods of heavy thunderstorms, with steady humidity and steady pressure. Winds turning from the NNE to the E at 4 mph 7 km/h.

Saturday, September 5, 2026

Mid-Morning
Mount Prospect Weather - 2026-09-05 - Morning - Scattered Showers
73°F 23°C
Scattered Showers
Mid-Afternoon
Mount Prospect Weather - 2026-09-05 - Afternoon - Sunny
83°F 28°C
Sunny
Early-Evening
Mount Prospect Weather - 2026-09-05 - Evening - Sunny
74°F 23°C
Sunny
Balmy with temperatures reaching 83°F 28°C, scattered downpours possible, with lower humidity and steady pressure. Winds switching from the ESE to the NE at 9 mph 15 km/h.

Sunday, September 6, 2026

Mid-Morning
Mount Prospect Weather - 2026-09-06 - Morning - Cloudy
71°F 22°C
Cloudy
Mid-Afternoon
Mount Prospect Weather - 2026-09-06 - Afternoon - Overcast
77°F 25°C
Overcast
Early-Evening
Mount Prospect Weather - 2026-09-06 - Evening - Overcast
71°F 22°C
Overcast
Enjoyable around 77°F 25°C, cloudy in the morning, becoming overcast through the afternoon and evening, with steady humidity and steady pressure. Winds moving from the E to the NE at 8 mph 12 km/h.

Monday, September 7, 2026

Mid-Morning
Mount Prospect Weather - 2026-09-07 - Morning - Sunny
67°F 19°C
Sunny
Mid-Afternoon
Mount Prospect Weather - 2026-09-07 - Afternoon - Overcast
77°F 25°C
Overcast
Early-Evening
Mount Prospect Weather - 2026-09-07 - Evening - Overcast
72°F 23°C
Overcast
Mild temperatures up to 77°F 25°C, sunny in the morning, becoming overcast through the afternoon and evening, with lower humidity and steady pressure. Winds swinging from the SE to the ENE at 7 mph 11 km/h.

Tuesday, September 8, 2026

Mid-Morning
Mount Prospect Weather - 2026-09-08 - Morning - Overcast
70°F 21°C
Overcast
Mid-Afternoon
Mount Prospect Weather - 2026-09-08 - Afternoon - Overcast
81°F 27°C
Overcast
Early-Evening
Mount Prospect Weather - 2026-09-08 - Evening - Overcast
80°F 27°C
Overcast
Very warm with a high of 81°F 27°C, overcast through the afternoon, turning partly cloudy this evening, with steady humidity and barometric pressure falling. Winds shifting from the SE to the S at 11 mph 17 km/h. Gusts up to 29 mph 47 km/h.

Wednesday, September 9, 2026

Mid-Morning
Mount Prospect Weather - 2026-09-09 - Morning - Scattered Showers
82°F 28°C
Scattered Showers
Mid-Afternoon
Mount Prospect Weather - 2026-09-09 - Afternoon - Sunny
91°F 33°C
Sunny
Early-Evening
Mount Prospect Weather - 2026-09-09 - Evening - Sunny
87°F 31°C
Sunny
Very hot with temperatures reaching 91°F 33°C, locally heavy downpours at times, with steady humidity and steady pressure. Winds SW at 8 mph 13 km/h.

Thursday, September 10, 2026

Mid-Morning
Mount Prospect Weather - 2026-09-10 - Morning - Overcast
80°F 27°C
Overcast
Mid-Afternoon
Mount Prospect Weather - 2026-09-10 - Afternoon - Overcast
83°F 28°C
Overcast
Early-Evening
Mount Prospect Weather - 2026-09-10 - Evening - Sunny
73°F 23°C
Sunny
Balmy with temperatures reaching 83°F 28°C, cloudy in the morning, partly cloudy in the afternoon, and cloudy this evening, with steady humidity and steady pressure. Winds switching from the SSE to the NE at 9 mph 14 km/h.

Friday, September 11, 2026

Mid-Morning
Mount Prospect Weather - 2026-09-11 - Morning - Sunny
76°F 25°C
Sunny
Mid-Afternoon
Mount Prospect Weather - 2026-09-11 - Afternoon - Scattered Showers
91°F 33°C
Scattered Showers
Early-Evening
Mount Prospect Weather - 2026-09-11 - Evening - Sunny
89°F 32°C
Sunny
Hot and sweltering around 91°F 33°C (heat index 95°F 35°C), scattered downpours possible, with lower humidity and steady pressure.

Saturday, September 12, 2026

Mid-Morning
Mount Prospect Weather - 2026-09-12 - Morning - Sunny
84°F 29°C
Sunny
Mid-Afternoon
Mount Prospect Weather - 2026-09-12 - Afternoon - Sunny
92°F 33°C
Sunny
Early-Evening
Mount Prospect Weather - 2026-09-12 - Evening - Sunny
86°F 31°C
Sunny
Very hot with a high of 92°F 33°C, feeling closer to 95°F 35°C in the humidity, sunny through the afternoon, turning partly cloudy this evening, with steady humidity and steady pressure. Winds moving from the SW to the ENE at 6 mph 9 km/h.

Sunday, September 13, 2026

Mid-Morning
Mount Prospect Weather - 2026-09-13 - Morning - Sunny
81°F 27°C
Sunny
Mid-Afternoon
Mount Prospect Weather - 2026-09-13 - Afternoon - Sunny
93°F 34°C
Sunny
Early-Evening
Mount Prospect Weather - 2026-09-13 - Evening - Overcast
83°F 29°C
Overcast
Very hot with a high of 93°F 34°C, sunny in the morning, cloudy in the afternoon, and overcast this evening, with steady humidity and barometric pressure falling. Winds SSW at 13 mph 22 km/h. Gusts up to 31 mph 50 km/h.

Monday, September 14, 2026

Mid-Morning
Mount Prospect Weather - 2026-09-14 - Morning - Sunny
65°F 18°C
Sunny
Mid-Afternoon
Mount Prospect Weather - 2026-09-14 - Afternoon - Sunny
75°F 24°C
Sunny
Early-Evening
Mount Prospect Weather - 2026-09-14 - Evening - Sunny
72°F 22°C
Sunny
Pleasant near 75°F 24°C, sunny throughout the day, with steady humidity and steady pressure. Winds shifting from the NW to the S at 4 mph 7 km/h.

Tuesday, September 15, 2026

Mid-Morning
Mount Prospect Weather - 2026-09-15 - Morning - Cloudy
69°F 20°C
Cloudy
Mid-Afternoon
Mount Prospect Weather - 2026-09-15 - Afternoon - Sunny
83°F 29°C
Sunny
Early-Evening
Mount Prospect Weather - 2026-09-15 - Evening - Scattered Showers
82°F 28°C
Scattered Showers
Very warm near 83°F 29°C, though humidity makes it feel like 86°F 30°C, locally heavy downpours at times, with steady humidity and barometric pressure falling. Winds blowing from the SSW at 13 mph 21 km/h. Gusts up to 27 mph 43 km/h.

Wednesday, September 16, 2026

Mid-Morning
Mount Prospect Weather - 2026-09-16 - Morning - Sunny
81°F 27°C
Sunny
Mid-Afternoon
Mount Prospect Weather - 2026-09-16 - Afternoon - Cloudy
93°F 34°C
Cloudy
Early-Evening
Mount Prospect Weather - 2026-09-16 - Evening - Sunny
91°F 33°C
Sunny
Sizzling hot near 93°F 34°C with a heat index reaching 96°F 36°C, cloudy in the morning, partly cloudy in the afternoon, and sunny this evening, with lower humidity and steady pressure. Winds switching from the SSW to the S at 9 mph 15 km/h. Gusts up to 25 mph 40 km/h.

Thursday, September 17, 2026

Mid-Morning
Mount Prospect Weather - 2026-09-17 - Morning - Overcast
79°F 26°C
Overcast
Mid-Afternoon
Mount Prospect Weather - 2026-09-17 - Afternoon - Overcast
85°F 30°C
Overcast
Early-Evening
Mount Prospect Weather - 2026-09-17 - Evening - Cloudy
76°F 24°C
Cloudy
Quite warm reaching 85°F 30°C, feeling like 89°F 32°C during peak afternoon, cloudy in the morning, overcast in the afternoon, and cloudy this evening, with steady humidity and steady pressure. Winds moving from the SW to the NNW at 8 mph 12 km/h.

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Weather by the Numbers

Fri, 4th
Mount Prospect IL Weather - Friday, Sep 4, 2026 - Overcast
Hi: 95°F 35°C
Lo: 75°F 24°C
Sunrise 06:20 AM
Sunset 07:20 PM
Wind WSW 9 mph15 km/h
Dew Point 63°F17°C
uv Index 4
Barometric Pressure 29.85 in1011 mb
POP 10% *
Humidity 41%
Sat, 5th
Mount Prospect IL Weather - Saturday, Sep 5, 2026 - Sunny
Hi: 84°F 29°C
Lo: 71°F 22°C
Sunrise 06:21 AM
Sunset 07:19 PM
Wind E 6 mph10 km/h
Dew Point 65°F18°C
uv Index 7
Barometric Pressure 29.91 in1013 mb
POP 2% *
Humidity 55%
Sun, 6th
Mount Prospect IL Weather - Sunday, Sep 6, 2026 - Sunny
Hi: 77°F 25°C
Lo: 67°F 19°C
Sunrise 06:22 AM
Sunset 07:17 PM
Wind ENE 10 mph15 km/h
Dew Point 52°F11°C
uv Index 7
Barometric Pressure 30.09 in1019 mb
POP 1% *
Humidity 44%
Mon, 7th
Mount Prospect IL Weather - Monday, Sep 7, 2026 - Overcast
Hi: 77°F 25°C
Lo: 66°F 19°C
Sunrise 06:23 AM
Sunset 07:15 PM
Wind E 7 mph11 km/h
Dew Point 50°F10°C
uv Index 5
Barometric Pressure 30.15 in1021 mb
POP 10% *
Humidity 39%
Tue, 8th
Mount Prospect IL Weather - Tuesday, Sep 8, 2026 - Cloudy
Hi: 82°F 28°C
Lo: 66°F 19°C
Sunrise 06:24 AM
Sunset 07:13 PM
Wind SSE 8 mph12 km/h
Dew Point 56°F13°C
uv Index 6
Barometric Pressure 30.06 in1018 mb
POP 7% *
Humidity 42%
Wed, 9th
Mount Prospect IL Weather - Wednesday, Sep 9, 2026 - Patchy Rain Nearby
Hi: 91°F 33°C
Lo: 78°F 25°C
Sunrise 06:25 AM
Sunset 07:12 PM
Wind SSW 5 mph8 km/h
Dew Point 60°F15°C
uv Index 7
Barometric Pressure 29.94 in1014 mb
POP 2% *
Humidity 39%
Thu, 10th
Mount Prospect IL Weather - Thursday, Sep 10, 2026 - Patchy Rain Nearby
Hi: 84°F 29°C
Lo: 69°F 21°C
Sunrise 06:26 AM
Sunset 07:10 PM
Wind NE 9 mph14 km/h
Dew Point 65°F18°C
uv Index 6
Barometric Pressure 30.03 in1017 mb
POP 11% *
Humidity 54%
Fri, 11th
Mount Prospect IL Weather - Friday, Sep 11, 2026 - Patchy Rain Nearby
Hi: 92°F 33°C
Lo: 69°F 21°C
Sunrise 06:28 AM
Sunset 07:08 PM
Wind SSE 5 mph8 km/h
Dew Point 66°F19°C
uv Index 7
Barometric Pressure 29.91 in1013 mb
POP 8% *
Humidity 51%
Sat, 12th
Mount Prospect IL Weather - Saturday, Sep 12, 2026 - Sunny
Hi: 92°F 34°C
Lo: 80°F 27°C
Sunrise 06:29 AM
Sunset 07:06 PM
Wind SW 11 mph17 km/h
Dew Point 63°F17°C
uv Index 8
Barometric Pressure 29.88 in1012 mb
POP 1% *
Humidity 41%
Sun, 13th
Mount Prospect IL Weather - Sunday, Sep 13, 2026 - Sunny
Hi: 93°F 34°C
Lo: 69°F 21°C
Sunrise 06:30 AM
Sunset 07:05 PM
Wind SW 13 mph21 km/h
Dew Point 63°F17°C
uv Index 8
Barometric Pressure 29.83 in1010 mb
POP 1% *
Humidity 44%
Mon, 14th
Mount Prospect IL Weather - Monday, Sep 14, 2026 - Sunny
Hi: 76°F 24°C
Lo: 60°F 15°C
Sunrise 06:31 AM
Sunset 07:03 PM
Wind WNW 8 mph12 km/h
Dew Point 44°F7°C
uv Index 6
Barometric Pressure 30.06 in1018 mb
POP 1% *
Humidity 37%
Tue, 15th
Mount Prospect IL Weather - Tuesday, Sep 15, 2026 - Sunny
Hi: 84°F 29°C
Lo: 63°F 17°C
Sunrise 06:32 AM
Sunset 07:01 PM
Wind SSW 12 mph19 km/h
Dew Point 58°F14°C
uv Index 7
Barometric Pressure 29.97 in1015 mb
POP 2% *
Humidity 50%
Wed, 16th
Mount Prospect IL Weather - Wednesday, Sep 16, 2026 - Patchy Rain Nearby
Hi: 93°F 34°C
Lo: 76°F 24°C
Sunrise 06:33 AM
Sunset 06:59 PM
Wind SSW 14 mph22 km/h
Dew Point 65°F18°C
uv Index 7
Barometric Pressure 30 in1016 mb
POP 6% *
Humidity 46%
Thu, 17th
Mount Prospect IL Weather - Thursday, Sep 17, 2026 - Cloudy
Hi: 85°F 30°C
Lo: 69°F 20°C
Sunrise 06:34 AM
Sunset 06:58 PM
Wind WSW 11 mph18 km/h
Dew Point 66°F19°C
uv Index 6
Barometric Pressure 30.06 in1018 mb
POP 11% *
Humidity 56%
* POP = Probability of Precipitation. Data for 12:00 PM.