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City briefing

Mount Prospect

Illinois, United States · 57,000 people
Jan
Feb
Mar
Apr
May
Jun
Jul
Aug
Sep
Oct
Nov
Dec
The year’s records
Annual mean 11°C · wettest around April · prevailing wind SW
Warmest
26.9 °C
Coldest
-2.9 °C
Wettest
16%
Windiest
6.3 m/s
Prevailing
SW
5.3 m/s average

When this place is good five ratings · thirty-six ten-day sections · click a cell to read it

Jan
Feb
Mar
Apr
May
Jun
Jul
Aug
Sep
Oct
Nov
Dec

Every reading

bars actual · line feels-like, °C
-15-10-50510152025JanuaryFebruaryMarchAprilMayJuneJulyAugustSeptemberOctoberNovemberDecember-15-10-50510152025JFMAMJJASOND

The average temperature in Mount Prospect over the whole year is 11°C. July is the hottest month, with highs of about 27°C; January is the coldest, with lows of about -5°C.

Month by month Mount Prospect climate by month: average temperatures year round · click a month to read it

MonthHighLowFeels likeChance of rainCloudWindBeing outsideSunWalking
January-2°C-5°C-8°C9%71%5.0 m/s001
February1°C-3°C-5°C8%62%5.1 m/s108
March6°C2°C1°C10%64%5.2 m/s3019
April11°C6°C6°C11%64%5.1 m/s17043
May18°C13°C15°C10%61%4.5 m/s471162
June25°C19°C23°C8%52%4.2 m/s633745
July27°C22°C27°C7%50%3.7 m/s565624
August26°C20°C26°C6%49%3.7 m/s625229
September23°C17°C21°C7%52%4.0 m/s702857
October15°C10°C11°C10%58%4.5 m/s35462
November7°C3°C2°C7%61%4.9 m/s6025
December2°C-1°C-4°C9%68%4.8 m/s006

High and low are the warmest and coolest of four readings a day — midnight, 6am, noon and 6pm — so a true overnight low can sit a degree or two under them. Chance of rain, cloud and wind are the day’s average; feels-like and the three ratings (each out of 100: Good from 55, Ideal from 80) are read at midday.

Seasons, and the year in short Mount Prospect weather by season

Year round, Mount Prospect has days of about -2°C at their warmest in January, its coolest month, and 27°C in July, its warmest; the coolest hours of the day run from -5°C to 22°C through the year, and the average temperature over the year is 11°C around the clock. Rain is most likely around April and least likely around August. Every figure here is a decade of observations blended into one representative year, so it reads as what this date is usually like, not a forecast for one particular day.

Mount Prospect weather in winterDecember to February

High 0°CLow -3°CRain 9%

Winter in Mount Prospect has typical daily highs of about 0°C and lows of about -3°C, with a 9% chance of rain on a given day.

Mount Prospect weather in springMarch to May

High 12°CLow 7°CRain 10%

Spring in Mount Prospect has typical daily highs of about 12°C and lows of about 7°C, with a 10% chance of rain on a given day.

Mount Prospect weather in summerJune to August

High 26°CLow 20°CRain 7%

Summer in Mount Prospect has typical daily highs of about 26°C and lows of about 20°C, with a 7% chance of rain on a given day.

Mount Prospect weather in autumnSeptember to November

High 15°CLow 10°CRain 8%

Autumn in Mount Prospect has typical daily highs of about 15°C and lows of about 10°C, with a 8% chance of rain on a given day.

When is the rainy season in Mount Prospect?

Mount Prospect has no sharply defined rainy season: the chance of rain on a given day runs from 6% in August, the driest month, to 11% in April, the wettest.

What time of year is Mount Prospect windiest?

Winds in Mount Prospect are highest in March, averaging 5.2 m/s (19 km/h), and lightest in July, at 3.7 m/s (13 km/h). The prevailing wind is from the SW.

What is the average temperature in Mount Prospect year round?

The average temperature in Mount Prospect over the whole year is 11°C. July is the hottest month, with highs of about 27°C; January is the coldest, with lows of about -5°C.

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