Climate and monthly weather forecastAlgonquin, IL
Climate and monthly weather forecast
Weather in January
January, the same as December, in Algonquin, Illinois, is a freezing cold winter month, with temperature in the range of an average high of 27°F (-2.8°C) and an average low of 15.3°F (-9.3°C). January, with its average high-temperature of 27°F (-2.8°C) and an average low-temperature of 15.3°F (-9.3°C), holds the record as the coldest month. Weather in January »Weather in February
The last month of the winter, February, is also a subzero cold month in Algonquin, Illinois, with an average temperature fluctuating between 30.7°F (-0.7°C) and 18°F (-7.8°C). February's arrival registers an average high-temperature of a still subzero cold 30.7°F (-0.7°C), closely aligning with the temperature of the previous month. Weather in February »Weather in March
The first month of the spring, March, is a chilly month in Algonquin, Illinois, with an average temperature ranging between min 29.7°F (-1.3°C) and max 43.7°F (6.5°C). With the onset of March, Algonquin experiences a temperature shift, with the average high-temperature moving from a subzero cold 30.7°F (-0.7°C) in February to a frosty 43.7°F (6.5°C). Weather in March »Weather in April
April in Algonquin, Illinois, is a cool spring month, with an average temperature fluctuating between 38.8°F (3.8°C) and 55°F (12.8°C). A shift in the average high-temperature is noticeable in April, changing from a chilly 43.7°F (6.5°C) in March to a fresh 55°F (12.8°C). Weather in April »Weather in May
The last month of the spring, May, is an enjoyable month in Algonquin, Illinois, with an average temperature varying between 50°F (10°C) and 67.1°F (19.5°C). Algonquin's weather shows a temperature rise with the arrival of May, moving from a cool 55°F (12.8°C) in April to a comfortable 67.1°F (19.5°C). Weather in May »Weather in June
The first month of the summer, June, is a warm month in Algonquin, Illinois, with an average temperature fluctuating between 76.5°F (24.7°C) and 59.2°F (15.1°C). Algonquin in June shows a temperature shift, moving from an average high of an enjoyable 67.1°F (19.5°C) in May to a warm 76.5°F (24.7°C). Weather in June »Weather in July
July, the same as June, is another warm summer month in Algonquin, Illinois, with an average temperature ranging between min 63.7°F (17.6°C) and max 80.1°F (26.7°C). July tends to be the warmest month, with temperatures averaging a daily high of 80.1°F (26.7°C) and a low of 63.7°F (17.6°C). Weather in July »Weather in August
The last month of the summer, August, is another warm month in Algonquin, Illinois, with an average temperature fluctuating between 78.6°F (25.9°C) and 62.1°F (16.7°C). Algonquin's weather in August displays an average high-temperature of a still moderately hot 78.6°F (25.9°C), showing minor disparity from July's 80.1°F (26.7°C). Weather in August »Weather in September
September, the first month of the autumn in Algonquin, is still a pleasant month, with temperature in the range of an average high of 72.5°F (22.5°C) and an average low of 55.6°F (13.1°C). The arrival of September corresponds with a light shift in temperature, down from a warm 78.6°F (25.9°C) in August to a pleasant 72.5°F (22.5°C). Weather in September »Weather in October
October, the same as September, in Algonquin, Illinois, is another mild autumn month, with an average temperature fluctuating between 59.5°F (15.3°C) and 44.2°F (6.8°C). The transition into October is accompanied by a temperature decrease, with the average high-temperature shifting from a pleasant 72.5°F (22.5°C) in September to a refreshing 59.5°F (15.3°C). Weather in October »Weather in November
The last month of the autumn, November, is another chilly month in Algonquin, Illinois, with an average temperature fluctuating between 45.1°F (7.3°C) and 31.8°F (-0.1°C). As Algonquin, Illinois, transitions into November, a noticeable drop in the average high-temperature is observed, falling from a moderate 59.5°F (15.3°C) in October to a frosty 45.1°F (7.3°C). Weather in November »Weather in December
The first month of the winter, December, is still a cold month in Algonquin, Illinois, with an average temperature varying between 33.3°F (0.7°C) and 23.2°F (-4.9°C). The shift to December brings a decrease in the average high-temperature, falling from a frosty 45.1°F (7.3°C) in November to a wintry 33.3°F (0.7°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 27°F (-2.8°C) and a low of 15.3°F (-9.3°C), January is regarded as the coldest month.
The most humid month is January, with an average relative humidity of 85%.
Throughout the year, in Algonquin, Illinois, there are 132.8 rainfall days, and 15.47" (393mm) of precipitation is accumulated.
January through May, October through December are months with snowfall in Algonquin.
January is the month with the most snowfall in Algonquin. Snow falls for 12.2 days and accumulates 2.01" (51mm) of snow.
In Algonquin, during the entire year, snow falls for 43.2 days and aggregates up to 7.4" (188mm) of snow.
January has the least sunshine of the year in Algonquin, with an average of 3.7h of sunshine.
January and December, with an average maximum UV index of 1, are months with the lowest UV index in Algonquin, Illinois.
On Sunday, March 10. 2024, at 2:00 am, Daylight Saving Time starts in Algonquin, 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 months with the lowest humidity in Algonquin, Illinois, are April and October, with an average relative humidity of 76%.
The months with the most rainfall in Algonquin are April and August, with an average 1.89" (48mm) of precipitation.
In Algonquin, snow does not fall in June through September.
June has the longest days of the year in Algonquin, with an average of 15h and 12min of daylight.
Algonquin's July weather, marked by an average high temperature of 80.1°F (26.7°C) and an average low temperature of 63.7°F (17.6°C), is the warmest in the year.
July has the most sunshine of the year, with an average of 10h of sunshine.
With an average maximum UV index of 6, July is the month with the highest UV index in Algonquin, Illinois.
The month with the least rainfall is December, when the rain falls for 6.5 days and typically collects 0.67" (17mm) of precipitation.
December has the shortest days of the year in Algonquin, with an average of 9h and 12min of daylight.
Average temperature
Algonquin, IL
The warmest month (with the highest average high temperature) is July (80.1°F).
The month with the lowest average high temperature is January (27°F).
The month with the highest average low temperature is July (63.7°F).
The coldest month (with the lowest average low temperature) is January (15.3°F).
Average pressure
Algonquin, 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"Hg - Average pressure in November:
30.09"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
Algonquin, IL
- Average wind speed in January:
9.9mph - Average wind speed in February:
9.9mph - Average wind speed in March:
9.5mph - Average wind speed in April:
9.8mph - Average wind speed in May:
8.2mph - Average wind speed in June:
7.2mph
- Average wind speed in July:
6.4mph - Average wind speed in August:
6.1mph - Average wind speed in September:
7.1mph - Average wind speed in October:
8.7mph - Average wind speed in November:
9.4mph - Average wind speed in December:
9.2mph
The windiest months (with the highest average wind speed) are January and February (9.9mph).
The calmest month (with the lowest average wind speed) is August (6.1mph).
Average humidity
Algonquin, IL
The month with the highest relative humidity is January (85%).
The months with the lowest relative humidity are April and October (76%).
Average rainfall
Algonquin, IL
- Average rainfall in January:
0.79" - Average rainfall in February:
0.79" - Average rainfall in March:
0.91" - Average rainfall in April:
1.89" - Average rainfall in May:
1.85" - Average rainfall in June:
1.81"
- Average rainfall in July:
1.85" - Average rainfall in August:
1.89" - Average rainfall in September:
1.1" - Average rainfall in October:
1.22" - Average rainfall in November:
0.71" - Average rainfall in December:
0.67"
The wettest months (with the highest rainfall) are April and August (1.89").
The driest month (with the least rainfall) is December (0.67").
Average rainfall days
Algonquin, IL
- Average rainfall days in January:
4.9 days - Average rainfall days in February:
4.1 days - Average rainfall days in March:
10.3 days - Average rainfall days in April:
13.8 days - Average rainfall days in May:
15 days - Average rainfall days in June:
14.8 days
- Average rainfall days in July:
17.3 days - Average rainfall days in August:
15.8 days - Average rainfall days in September:
11.5 days - Average rainfall days in October:
11.5 days - Average rainfall days in November:
7.3 days - Average rainfall days in December:
6.5 days
The month with the highest number of rainy days is July (17.3 days).
The month with the least rainy days is February (4.1 days).
Average snowfall
Algonquin, IL
- Average snowfall in January:
2.01" - Average snowfall in February:
1.57" - Average snowfall in March:
0.71" - Average snowfall in April:
1.3" - Average snowfall in May:
0.08" - Average snowfall in June:
0"
The month with the highest snowfall is January (2.01").
The months with the least snowfall are June, July, August and September (0").
Average snowfall days
Algonquin, IL
- Average snowfall days in January:
12.2 days - Average snowfall days in February:
9.3 days - Average snowfall days in March:
6.1 days - Average snowfall days in April:
2.3 days - Average snowfall days in May:
0.1 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:
0.5 days - Average snowfall days in November:
3.6 days - Average snowfall days in December:
9.1 days
The month with the highest number of snowfall days is January (12.2 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight / Average sunshine
Algonquin, IL
- Average daylight in January:
9h and 30min - 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 54min - 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 48min - Average sunshine in March:
6h and 6min - Average sunshine in April:
7h and 30min - Average sunshine in May:
8h and 30min - Average sunshine in June:
9h and 42min
- Average sunshine in July:
10h and 0min - Average sunshine in August:
9h and 54min - Average sunshine in September:
8h and 54min - Average sunshine in October:
5h and 30min - Average sunshine in November:
5h and 6min - Average sunshine in December:
3h and 54min
The month with the most sunshine is July (Average sunshine: 10h and 0min).
The month with the least sunshine is January (Average sunshine: 3h and 42min).
Average sunshine days
Algonquin, IL
- Average sunshine days in January:
16.2 days - Average sunshine days in February:
15.3 days - Average sunshine days in March:
15.7 days - Average sunshine days in April:
12.9 days - Average sunshine days in May:
12.8 days - Average sunshine days in June:
12.2 days
- Average sunshine days in July:
10.7 days - Average sunshine days in August:
11.2 days - Average sunshine days in September:
14.5 days - Average sunshine days in October:
16.5 days - Average sunshine days in November:
18.3 days - Average sunshine days in December:
18.5 days
The month with the most sunshine days is December (18.5 days).
The month with the least sunshine days is July (10.7 days).
Average UV index
Algonquin, IL
The month with the highest UV index is July (UV index 6).
The months with the lowest UV index are January and December (UV index 1).
Average cloud cover
Algonquin, IL
The month with the most cloud cover is January (Cloud cover 62).
The months with the least cloud cover are July, August and September (Cloud cover 32).
Average visibility
Algonquin, IL
The months with the highest visibility are February, March, April, May, June, July, August, September, October, November and December (6mi).
The month with the lowest visibility is January (5mi).
