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City briefing

Blue Island

Illinois, United States · 23,000 people
Jan
Feb
Mar
Apr
May
Jun
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Aug
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The year’s records
Annual mean 11°C · wettest around July · prevailing wind W
Warmest
26.6 °C
Coldest
-2.6 °C
Wettest
64%
Windiest
6.1 m/s
Prevailing
W
5.1 m/s average

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

Jan
Feb
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Every reading

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

The average temperature in Blue Island over the whole year is 11°C. July is the hottest month, with highs of about 26°C; January is the coldest, with lows of about -4°C.

Month by month Blue Island climate by month: average temperatures year round · click a month to read it

MonthHighLowFeels likeChance of rainCloudWindBeing outsideSunWalking
January-2°C-4°C-8°C50%66%4.9 m/s001
February1°C-3°C-5°C49%55%4.9 m/s107
March6°C2°C1°C56%56%5.0 m/s3017
April12°C6°C6°C54%55%4.9 m/s16138
May18°C13°C15°C57%52%4.2 m/s441155
June25°C19°C23°C53%42%3.8 m/s563540
July26°C21°C27°C57%41%3.3 m/s505221
August26°C20°C26°C56%40%3.3 m/s564826
September23°C16°C22°C54%42%3.6 m/s652950
October16°C10°C12°C56%50%4.3 m/s33457
November8°C3°C2°C53%53%4.7 m/s6024
December2°C-1°C-4°C55%61%4.7 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 Blue Island weather by season

Year round, Blue Island has days of about -2°C at their warmest in January, its coolest month, and 26°C in July, its warmest; the coolest hours of the day run from -4°C to 21°C through the year, and the average temperature over the year is 11°C around the clock. Rain is most likely around July and least likely around February. 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.

Blue Island weather in winterDecember to February

High 1°CLow -3°CRain 51%

Winter in Blue Island has typical daily highs of about 1°C and lows of about -3°C, with a 51% chance of rain on a given day.

Blue Island weather in springMarch to May

High 12°CLow 7°CRain 55%

Spring in Blue Island has typical daily highs of about 12°C and lows of about 7°C, with a 55% chance of rain on a given day.

Blue Island weather in summerJune to August

High 26°CLow 20°CRain 56%

Summer in Blue Island has typical daily highs of about 26°C and lows of about 20°C, with a 56% chance of rain on a given day.

Blue Island weather in autumnSeptember to November

High 15°CLow 10°CRain 55%

Autumn in Blue Island has typical daily highs of about 15°C and lows of about 10°C, with a 55% chance of rain on a given day.

When is the rainy season in Blue Island?

Blue Island has no sharply defined rainy season: the chance of rain on a given day runs from 49% in February, the driest month, to 57% in July, the wettest.

What time of year is Blue Island windiest?

Winds in Blue Island are highest in March, averaging 5.0 m/s (18 km/h), and lightest in July, at 3.3 m/s (12 km/h). The prevailing wind is from the W.

What is the average temperature in Blue Island year round?

The average temperature in Blue Island over the whole year is 11°C. July is the hottest month, with highs of about 26°C; January is the coldest, with lows of about -4°C.

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