Climate and monthly weather forecastCahokia, IL
Climate and monthly weather forecast
Weather in January
January, the same as December, is another cold winter month in Cahokia, Illinois, with an average temperature fluctuating between 24.6°F (-4.1°C) and 37.8°F (3.2°C). Cahokia's coldest temperatures are experienced in January, with average high temperatures of 37.8°F (3.2°C) and lows of 24.6°F (-4.1°C). Weather in January »Weather in February
February, the last month of the winter in Cahokia, is also an icy month, with temperature in the range of an average high of 42.4°F (5.8°C) and an average low of 27.9°F (-2.3°C). With the advent of February, Cahokia experiences an average high-temperature of a still cold 42.4°F (5.8°C), mirroring a close resemblance to the previous month. Weather in February »Weather in March
The first month of the spring, March, is a fresh month in Cahokia, Illinois, with an average temperature fluctuating between 54.5°F (12.5°C) and 37.9°F (3.3°C). The onset of March brings a rise in the average high-temperature, elevating from a wintry 42.4°F (5.8°C) in February to a cool 54.5°F (12.5°C). Weather in March »Weather in April
April is an enjoyable spring month in Cahokia, Illinois, with an average temperature fluctuating between 65.5°F (18.6°C) and 48°F (8.9°C). The shift from March to April brings an increase in the average high-temperature, moving from a cool 54.5°F (12.5°C) to a comfortable 65.5°F (18.6°C). Weather in April »Weather in May
May, the last month of the spring in Cahokia, is a moderately hot month, with an average temperature ranging between max 74.8°F (23.8°C) and min 57.7°F (14.3°C). Cahokia's May weather shows an increase in high-temperatures, moving from April's enjoyable 65.5°F (18.6°C) to a moderately hot 74.8°F (23.8°C). Weather in May »Weather in June
The first month of the summer, June, is also a moderately hot month in Cahokia, Illinois, with an average temperature varying between 66.9°F (19.4°C) and 83.8°F (28.8°C). A shift in the average high-temperature is noticeable in June, changing from 74.8°F (23.8°C) in May to a still moderately hot 83.8°F (28.8°C). Weather in June »Weather in July
July is a hot summer month in Cahokia, Illinois, with an average temperature varying between 86.4°F (30.2°C) and 68.5°F (20.3°C). July is the month when Cahokia's temperatures reach their peak, with averages of 86.4°F (30.2°C) and lows of 68.5°F (20.3°C). The heat index in July is calculated to be a torrid 100.4°F (38°C). Weather in July »Weather in August
August, the last month of the summer in Cahokia, is also a moderately hot month, with temperature in the range of an average low of 66.7°F (19.3°C) and an average high of 84.9°F (29.4°C). The advent of August signifies a minor shift to an average high-temperature of a moderately hot 84.9°F (29.4°C), aligning closely with July. Weather in August »Weather in September
September, the first month of the autumn in Cahokia, is also a moderately hot month, with an average temperature ranging between max 79.3°F (26.3°C) and min 59.9°F (15.5°C). The transition into September involves a small decrease in the average high-temperature, dipping slightly from a moderately hot 84.9°F (29.4°C) in August to a still warm 79.3°F (26.3°C). Weather in September »Weather in October
October, like September, in Cahokia, Illinois, is another enjoyable autumn month, with an average temperature fluctuating between 49.1°F (9.5°C) and 66.6°F (19.2°C). Cahokia in October demonstrates a small temperature transition, adjusting from an average high of a moderately hot 79.3°F (26.3°C) in September to an enjoyable 66.6°F (19.2°C). Weather in October »Weather in November
The last month of the autumn, November, is another cool month in Cahokia, Illinois, with an average temperature fluctuating between 53.2°F (11.8°C) and 37.9°F (3.3°C). November brings a decrease in the average high-temperature, falling from October's comfortable 66.6°F (19.2°C) to a fresh 53.2°F (11.8°C). Weather in November »Weather in December
December, the first month of the winter in Cahokia, is still a chilly month, with an average temperature varying between 42.8°F (6°C) and 30.6°F (-0.8°C). December's arrival corresponds with a decrease in average high-temperatures, from November's fresh 53.2°F (11.8°C) to a frosty 42.8°F (6°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
Cahokia's January weather, with an average high temperature of 37.8°F (3.2°C) and an average low temperature of 24.6°F (-4.1°C), tends to be the coldest of the year.
Throughout the year, there are 152.2 rainfall days, and 36.46" (926mm) of precipitation is accumulated.
Months with snowfall in Cahokia are January through March, November and December.
In Cahokia, Illinois, during the entire year, snow falls for 20.2 days and aggregates up to 7.44" (189mm) of snow.
The month with the least sunshine in Cahokia, Illinois, is January, with an average of 4.6h of sunshine.
The months with the lowest UV index in Cahokia, Illinois, are January, February and December, with an average maximum UV index of 2.
The month with the least rainfall in Cahokia is February, when the rain falls for 7.8 days and typically collects 2.01" (51mm) of precipitation.
The month with the most snowfall in Cahokia, Illinois, is February, when snow falls for 5.8 days and typically aggregates up to 2.44" (62mm) of snow.
On Sunday, March 10. 2024, at 2:00 am, Daylight Saving Time starts in Cahokia, 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.
April through October are months without snowfall in Cahokia, Illinois.
May and July, with an average relative humidity of 78%, are most humid months in Cahokia.
The month with the most rainfall in Cahokia, Illinois, is May, when the rain falls for 17.4 days and typically aggregates up to 4.53" (115mm) of precipitation.
The months with the highest UV index are May through August, with an average maximum UV index of 6.
The month with the longest days is June, with an average of 14h and 48min of daylight.
June and July, with an average of 10.4h of sunshine, are months with the most sunshine.
In Cahokia, Illinois, the peak average temperatures are observed in July, with a high of 86.4°F (30.2°C) and a low of 68.5°F (20.3°C).
With an average relative humidity of 71%, October is the least humid month.
The month with the shortest days in Cahokia is December, with an average of 9h and 30min of daylight.
Average temperature
Cahokia, IL
The warmest month (with the highest average high temperature) is July (86.4°F).
The month with the lowest average high temperature is January (37.8°F).
The month with the highest average low temperature is July (68.5°F).
The coldest month (with the lowest average low temperature) is January (24.6°F).
Average pressure
Cahokia, IL
- Average pressure in January:
30.16"Hg - Average pressure in February:
30.12"Hg - Average pressure in March:
30.07"Hg - Average pressure in April:
29.94"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:
30.02"Hg - Average pressure in October:
30.03"Hg - Average pressure in November:
30.12"Hg - Average pressure in December:
30.13"Hg
The month with the highest atmospheric pressure is January (30.16"Hg).
The month with the lowest atmospheric pressure is June (29.92"Hg).
Average wind speed
Cahokia, IL
- Average wind speed in January:
9.3mph - Average wind speed in February:
9.2mph - Average wind speed in March:
9mph - Average wind speed in April:
8.9mph - Average wind speed in May:
7.3mph - Average wind speed in June:
6.5mph
- Average wind speed in July:
5.5mph - Average wind speed in August:
5.6mph - Average wind speed in September:
6mph - Average wind speed in October:
7.8mph - Average wind speed in November:
8.4mph - Average wind speed in December:
8.6mph
The windiest month (with the highest average wind speed) is January (9.3mph).
The calmest month (with the lowest average wind speed) is July (5.5mph).
Average humidity
Cahokia, IL
The months with the highest relative humidity are May and July (78%).
The month with the lowest relative humidity is October (71%).
Average rainfall
Cahokia, IL
- Average rainfall in January:
2.36" - Average rainfall in February:
2.01" - Average rainfall in March:
2.72" - Average rainfall in April:
4.09" - Average rainfall in May:
4.53" - Average rainfall in June:
4.02"
- Average rainfall in July:
3.43" - Average rainfall in August:
3.62" - Average rainfall in September:
2.28" - Average rainfall in October:
2.91" - Average rainfall in November:
2.09" - Average rainfall in December:
2.4"
The wettest month (with the highest rainfall) is May (4.53").
The driest month (with the least rainfall) is February (2.01").
Average rainfall days
Cahokia, IL
- Average rainfall days in January:
7.7 days - Average rainfall days in February:
7.8 days - Average rainfall days in March:
14.4 days - Average rainfall days in April:
15.7 days - Average rainfall days in May:
17.4 days - Average rainfall days in June:
15.9 days
- Average rainfall days in July:
17.3 days - Average rainfall days in August:
14.4 days - Average rainfall days in September:
12.6 days - Average rainfall days in October:
11 days - Average rainfall days in November:
9.6 days - Average rainfall days in December:
8.4 days
The month with the highest number of rainy days is May (17.4 days).
The month with the least rainy days is January (7.7 days).
Average snowfall
Cahokia, IL
The month with the highest snowfall is February (2.44").
The months with the least snowfall are April, May, June, July, August, September and October (0").
Average snowfall days
Cahokia, IL
- Average snowfall days in January:
6.4 days - Average snowfall days in February:
5.8 days - Average snowfall days in March:
2.4 days - Average snowfall days in April:
0.3 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:
0.1 days - Average snowfall days in November:
1.2 days - Average snowfall days in December:
4 days
The month with the highest number of snowfall days is January (6.4 days).
The months with the least snowfall days are May, June, July, August and September (0 days).
Average daylight / Average sunshine
Cahokia, IL
- Average daylight in January:
9h and 48min - Average daylight in February:
10h and 48min - Average daylight in March:
12h and 0min - Average daylight in April:
13h and 12min - Average daylight in May:
14h and 18min - Average daylight in June:
14h and 48min
- Average daylight in July:
14h and 30min - Average daylight in August:
13h and 36min - Average daylight in September:
12h and 24min - Average daylight in October:
11h and 12min - Average daylight in November:
10h and 6min - Average daylight in December:
9h and 30min
The month with the longest days is June (Average daylight: 14h and 48min).
The month with the shortest days is December (Average daylight: 9h and 30min).
- Average sunshine in January:
4h and 36min - Average sunshine in February:
4h and 42min - Average sunshine in March:
6h and 24min - Average sunshine in April:
8h and 30min - Average sunshine in May:
9h and 30min - Average sunshine in June:
10h and 24min
- Average sunshine in July:
10h and 24min - Average sunshine in August:
10h and 12min - Average sunshine in September:
9h and 24min - Average sunshine in October:
6h and 12min - Average sunshine in November:
5h and 36min - Average sunshine in December:
4h and 48min
The months with the most sunshine are June and July (Average sunshine: 10h and 24min).
The month with the least sunshine is January (Average sunshine: 4h and 36min).
Average sunshine days
Cahokia, IL
- Average sunshine days in January:
18.1 days - Average sunshine days in February:
14.6 days - Average sunshine days in March:
13.2 days - Average sunshine days in April:
12.4 days - Average sunshine days in May:
10.7 days - Average sunshine days in June:
11.3 days
- Average sunshine days in July:
11.4 days - Average sunshine days in August:
14.3 days - Average sunshine days in September:
15.4 days - Average sunshine days in October:
18.7 days - Average sunshine days in November:
18.5 days - Average sunshine days in December:
18.4 days
The month with the most sunshine days is October (18.7 days).
The month with the least sunshine days is May (10.7 days).
Average UV index
Cahokia, IL
The months with the highest UV index are May, June, July and August (UV index 6).
The months with the lowest UV index are January, February and December (UV index 2).
Average cloud cover
Cahokia, IL
The month with the most cloud cover is January (Cloud cover 51).
The month with the least cloud cover is August (Cloud cover 28).
Average visibility
Cahokia, 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).
