Climate and monthly weather forecastBlue Island, IL
Climate and monthly weather forecast
Weather in January
January, the same as December, in Blue Island, Illinois, is a freezing cold winter month, with an average temperature ranging between max 29.5°F (-1.4°C) and min 18.9°F (-7.3°C). The coldest period tends to be January, when average temperatures fluctuate between a high of 29.5°F (-1.4°C) and a low of 18.9°F (-7.3°C). Weather in January »Weather in February
The last month of the winter, February, is an icy month in Blue Island, Illinois, with an average temperature ranging between min 21.6°F (-5.8°C) and max 32.5°F (0.3°C). Blue Island's transition from January to February introduces an average high-temperature of a cold 32.5°F (0.3°C), marking an insignificant variation from the 29.5°F (-1.4°C). Weather in February »Weather in March
The first month of the spring, March, is a frosty month in Blue Island, Illinois, with an average temperature ranging between max 44.2°F (6.8°C) and min 32.4°F (0.2°C). March brings a rise in the average high-temperature, transitioning from February's icy 32.5°F (0.3°C) to a frosty 44.2°F (6.8°C). Weather in March »Weather in April
April in Blue Island, Illinois, is a fresh spring month, with temperature in the range of an average high of 55.2°F (12.9°C) and an average low of 41.2°F (5.1°C). An upsurge in temperatures occurs as March gives way to April, with average highs shifting from a frosty 44.2°F (6.8°C) to a cool 55.2°F (12.9°C). Weather in April »Weather in May
The last month of the spring, May, is a comfortable month in Blue Island, Illinois, with an average temperature fluctuating between 66.4°F (19.1°C) and 51.8°F (11°C). The shift from April to May is marked by an increase in the average high-temperature, moving from a cool 55.2°F (12.9°C) to an enjoyable 66.4°F (19.1°C). Weather in May »Weather in June
The first month of the summer, June, is a warm month in Blue Island, Illinois, with temperature in the range of an average high of 76.3°F (24.6°C) and an average low of 61.5°F (16.4°C). The rise of average high-temperatures is seen in June, with an increase from a comfortable 66.4°F (19.1°C) in May to a moderately hot 76.3°F (24.6°C). Weather in June »Weather in July
July, like June, in Blue Island, Illinois, is a moderately hot summer month, with temperature in the range of an average low of 66.6°F (19.2°C) and an average high of 81°F (27.2°C). July, on average, is the warmest month, registering a high temperature of 81°F (27.2°C) and a low of 66.6°F (19.2°C). For most parts of July, the heat index is computed to be a hot 86°F (30°C). Weather in July »Weather in August
August, the last month of the summer in Blue Island, is another warm month, with an average temperature varying between 79.9°F (26.6°C) and 65.8°F (18.8°C). August registers an average high-temperature of a still warm 79.9°F (26.6°C), slightly varied from July's 81°F (27.2°C). Weather in August »Weather in September
September, the first month of the autumn in Blue Island, is also a moderately hot month, with temperature in the range of an average low of 59.2°F (15.1°C) and an average high of 73.6°F (23.1°C). September ushers in a minute temperature change, with average high-temperatures reducing from August's 79.9°F (26.6°C) to a still moderately hot 73.6°F (23.1°C). Weather in September »Weather in October
October, the same as September, in Blue Island, Illinois, is a moderate autumn month, with an average temperature varying between 47.1°F (8.4°C) and 60.6°F (15.9°C). A decrease in the average high-temperature is observed during October, shifting from a warm 73.6°F (23.1°C) in September to a moderate 60.6°F (15.9°C). Weather in October »Weather in November
November, the last month of the autumn in Blue Island, is also a frosty month, with an average temperature ranging between min 35.1°F (1.7°C) and max 46.2°F (7.9°C). The shift from October to November brings a noticeable decrease in the average high-temperature, dropping from a refreshing 60.6°F (15.9°C) to a frosty 46.2°F (7.9°C). Weather in November »Weather in December
December, the first month of the winter in Blue Island, is still a cold month, with an average temperature varying between 26.4°F (-3.1°C) and 35.2°F (1.8°C). Transition into December marks a drop in the average high-temperature, moving from a chilly 46.2°F (7.9°C) in November to a cold 35.2°F (1.8°C). Weather in December »Updated: Feb 12, 2024
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
With its average high temperature of 29.5°F (-1.4°C) and a low of 18.9°F (-7.3°C), January is regarded as the coldest month in Blue Island, Illinois.
The months with the highest humidity in Blue Island are January and February, with an average relative humidity of 82%.
In Blue Island, during the entire year, the rain falls for 147.7 days and collects up to 23.62" (600mm) of precipitation.
January through April, October through December are months with snowfall in Blue Island.
Throughout the year, in Blue Island, Illinois, there are 42.4 snowfall days, and 11.61" (295mm) of snow is accumulated.
The month with the least sunshine in Blue Island, Illinois, is January, with an average of 3.7h of sunshine.
The month with the most snowfall is February, when snow falls for 9.5 days and typically aggregates up to 3.07" (78mm) of snow.
On Sunday, March 10. 2024, at 2:00 am, Daylight Saving Time starts in Blue Island, and the time zone changes from CST to CDT. Daylight Saving Time ends Sunday, November 3. 2024, at 2:00 am, and the time zone reverts from CDT to CST.
The month with the most rainfall is May, when the rain falls for 17.7 days and typically aggregates up to 3.07" (78mm) of precipitation.
May through September are months without snowfall in Blue Island, Illinois.
June has the longest days of the year in Blue Island, Illinois, with an average of 15h and 12min of daylight.
June through August, with an average maximum UV index of 6, are months with the highest UV index.
During the warmest month in Blue Island, July, temperatures average a high of 81°F (27.2°C) and a low of 66.6°F (19.2°C).
With an average of 10.5h of sunshine, August has the most sunshine of the year in Blue Island.
October is the least humid month in Blue Island, with an average relative humidity of 72%.
December is the month with the least rainfall in Blue Island, Illinois. Rain falls for 7.4 days and accumulates 1.02" (26mm) of precipitation.
December has the shortest days of the year, with an average of 9h and 12min of daylight.
With an average maximum UV index of 1, December is the month with the lowest UV index in Blue Island, Illinois.
Average temperature
Blue Island, IL
The warmest month (with the highest average high temperature) is July (81°F).
The month with the lowest average high temperature is January (29.5°F).
The month with the highest average low temperature is July (66.6°F).
The coldest month (with the lowest average low temperature) is January (18.9°F).
Average pressure
Blue Island, IL
- Average pressure in January:
30.11"Hg - Average pressure in February:
30.1"Hg - Average pressure in March:
30.09"Hg - Average pressure in April:
29.95"Hg - Average pressure in May:
29.96"Hg - Average pressure in June:
29.92"Hg
- Average pressure in July:
29.97"Hg - Average pressure in August:
29.98"Hg - Average pressure in September:
30.03"Hg - Average pressure in October:
30.01"Hg - Average pressure in November:
30.1"Hg - Average pressure in December:
30.09"Hg
The month with the highest atmospheric pressure is January (30.11"Hg).
The month with the lowest atmospheric pressure is June (29.92"Hg).
Average wind speed
Blue Island, IL
- Average wind speed in January:
10.6mph - Average wind speed in February:
10.3mph - Average wind speed in March:
9.6mph - Average wind speed in April:
9.9mph - Average wind speed in May:
8.4mph - Average wind speed in June:
7.5mph
- Average wind speed in July:
6.6mph - Average wind speed in August:
6.5mph - Average wind speed in September:
7.7mph - Average wind speed in October:
9.5mph - Average wind speed in November:
10.1mph - Average wind speed in December:
9.9mph
The windiest month (with the highest average wind speed) is January (10.6mph).
The calmest month (with the lowest average wind speed) is August (6.5mph).
Average humidity
Blue Island, IL
The months with the highest relative humidity are January and February (82%).
The month with the lowest relative humidity is October (72%).
Average rainfall
Blue Island, IL
- Average rainfall in January:
1.18" - Average rainfall in February:
1.18" - Average rainfall in March:
1.3" - Average rainfall in April:
2.32" - Average rainfall in May:
3.07" - Average rainfall in June:
2.95"
- Average rainfall in July:
2.8" - Average rainfall in August:
2.72" - Average rainfall in September:
1.97" - Average rainfall in October:
1.93" - Average rainfall in November:
1.18" - Average rainfall in December:
1.02"
The wettest month (with the highest rainfall) is May (3.07").
The driest month (with the least rainfall) is December (1.02").
Average rainfall days
Blue Island, IL
- Average rainfall days in January:
6.2 days - Average rainfall days in February:
4.9 days - Average rainfall days in March:
10.5 days - Average rainfall days in April:
15.1 days - Average rainfall days in May:
17.7 days - Average rainfall days in June:
16.1 days
- Average rainfall days in July:
18 days - Average rainfall days in August:
16.3 days - Average rainfall days in September:
13.5 days - Average rainfall days in October:
12.8 days - Average rainfall days in November:
9.2 days - Average rainfall days in December:
7.4 days
The month with the highest number of rainy days is July (18 days).
The month with the least rainy days is February (4.9 days).
Average snowfall
Blue Island, IL
The month with the highest snowfall is February (3.07").
The months with the least snowfall are May, June, July, August and September (0").
Average snowfall days
Blue Island, IL
- Average snowfall days in January:
11.8 days - Average snowfall days in February:
9.5 days - Average snowfall days in March:
6.1 days - Average snowfall days in April:
2.3 days - Average snowfall days in May:
0 days - Average snowfall days in June:
0 days
- Average snowfall days in July:
0 days - Average snowfall days in August:
0 days - Average snowfall days in September:
0 days - Average snowfall days in October:
0.4 days - Average snowfall days in November:
2.9 days - Average snowfall days in December:
9.4 days
The month with the highest number of snowfall days is January (11.8 days).
The months with the least snowfall days are May, June, July, August and September (0 days).
Average daylight / Average sunshine
Blue Island, IL
- Average daylight in January:
9h and 36min - Average daylight in February:
10h and 36min - Average daylight in March:
12h and 0min - Average daylight in April:
13h and 24min - Average daylight in May:
14h and 36min - Average daylight in June:
15h and 12min
- Average daylight in July:
14h and 48min - Average daylight in August:
13h and 48min - Average daylight in September:
12h and 30min - Average daylight in October:
11h and 6min - Average daylight in November:
9h and 48min - Average daylight in December:
9h and 12min
The month with the longest days is June (Average daylight: 15h and 12min).
The month with the shortest days is December (Average daylight: 9h and 12min).
- Average sunshine in January:
3h and 42min - Average sunshine in February:
3h and 54min - Average sunshine in March:
6h and 12min - Average sunshine in April:
7h and 48min - Average sunshine in May:
8h and 54min - Average sunshine in June:
9h and 54min
- Average sunshine in July:
10h and 18min - Average sunshine in August:
10h and 30min - Average sunshine in September:
9h and 6min - Average sunshine in October:
5h and 54min - Average sunshine in November:
5h and 6min - Average sunshine in December:
4h and 12min
The month with the most sunshine is August (Average sunshine: 10h and 30min).
The month with the least sunshine is January (Average sunshine: 3h and 42min).
Average sunshine days
Blue Island, IL
- Average sunshine days in January:
13.9 days - Average sunshine days in February:
13.1 days - Average sunshine days in March:
14.3 days - Average sunshine days in April:
11.8 days - Average sunshine days in May:
10.8 days - Average sunshine days in June:
10.7 days
- Average sunshine days in July:
9.8 days - Average sunshine days in August:
10 days - Average sunshine days in September:
13 days - Average sunshine days in October:
14.9 days - Average sunshine days in November:
17.5 days - Average sunshine days in December:
15.5 days
The month with the most sunshine days is November (17.5 days).
The month with the least sunshine days is July (9.8 days).
Average UV index
Blue Island, IL
The months with the highest UV index are June, July and August (UV index 6).
The month with the lowest UV index is December (UV index 1).
Average cloud cover
Blue Island, IL
The month with the most cloud cover is January (Cloud cover 60).
The month with the least cloud cover is August (Cloud cover 28).
Average visibility
Blue Island, IL
The months with the highest visibility are January, February, March, April, May, June, July, August, September, October, November and December (6mi).
The months with the lowest visibility are January, February, March, April, May, June, July, August, September, October, November and December (6mi).
