Climate and monthly weather forecastCullom, IL
Climate and monthly weather forecast
Weather in January
January, like December, is another subzero cold winter month in Cullom, Illinois, with an average temperature ranging between min 18.3°F (-7.6°C) and max 29.8°F (-1.2°C). In Cullom, the lowest average temperatures are observed in January, with a high of 29.8°F (-1.2°C) and a low of 18.3°F (-7.6°C). Weather in January »Weather in February
The last month of the winter, February, is a wintry month in Cullom, Illinois, with an average temperature fluctuating between 21.4°F (-5.9°C) and 34°F (1.1°C). Cullom transitions into February recording an average high-temperature of a wintry 34°F (1.1°C), closely aligning with the preceding month's temperature. Weather in February »Weather in March
March, the first month of the spring in Cullom, is a frosty month, with an average temperature fluctuating between 47.3°F (8.5°C) and 33.3°F (0.7°C). With the onset of March, Cullom experiences a temperature shift, with the average high-temperature moving from a wintry 34°F (1.1°C) in February to a chilly 47.3°F (8.5°C). Weather in March »Weather in April
April is a moderate spring month in Cullom, Illinois, with an average temperature fluctuating between 43.5°F (6.4°C) and 59.4°F (15.2°C). With the onset of April, Cullom's average high-temperature experiences a rise, moving from March's frosty 47.3°F (8.5°C) to a refreshing 59.4°F (15.2°C). Weather in April »Weather in May
May, the last month of the spring in Cullom, is a pleasant month, with temperature in the range of an average high of 71.2°F (21.8°C) and an average low of 54.1°F (12.3°C). As April transitions into May, Cullom sees a rise in the average high-temperature, moving from a mild 59.4°F (15.2°C) to an agreeable 71.2°F (21.8°C). Weather in May »Weather in June
The first month of the summer, June, is a warm month in Cullom, Illinois, with temperature in the range of an average low of 62.2°F (16.8°C) and an average high of 79.3°F (26.3°C). As June begins, there's a slight increase in the average high-temperature, moving from an agreeable 71.2°F (21.8°C) in May to a moderately hot 79.3°F (26.3°C). Weather in June »Weather in July
July, like June, in Cullom, Illinois, is another warm summer month, with an average temperature fluctuating between 64.6°F (18.1°C) and 81.1°F (27.3°C). July stands out as Cullom's warmest month, with an average high-temperature of 81.1°F (27.3°C) and a low-temperature of 64.6°F (18.1°C). In July, the average heat index is calculated to be a hot 87.8°F (31°C). Weather in July »Weather in August
The last month of the summer, August, is also a moderately hot month in Cullom, Illinois, with an average temperature ranging between min 62.2°F (16.8°C) and max 79.7°F (26.5°C). The commencement of August brings an average high-temperature of a still warm 79.7°F (26.5°C), marking an inconsequential divergence from July. Weather in August »Weather in September
The first month of the autumn, September, is also a moderately hot month in Cullom, Illinois, with an average temperature ranging between min 57°F (13.9°C) and max 74.8°F (23.8°C). September's advent presents an average high-temperature of a still moderately hot 74.8°F (23.8°C), indicating a slight variation from the conditions of the previous month. Weather in September »Weather in October
October, the same as September, is another refreshing autumn month in Cullom, Illinois, with an average temperature varying between 46.8°F (8.2°C) and 61.9°F (16.6°C). Cullom in October experiences a subtle temperature decline, with average high-temperatures reducing from a warm 74.8°F (23.8°C) in September to an enjoyable 61.9°F (16.6°C). Weather in October »Weather in November
November, the last month of the autumn in Cullom, is also a frosty month, with an average temperature varying between 47.3°F (8.5°C) and 34.9°F (1.6°C). Cullom in November showcases a distinct temperature shift, moving from an average high of an enjoyable 61.9°F (16.6°C) in October to a chilly 47.3°F (8.5°C). Weather in November »Weather in December
The first month of the winter, December, is also an icy month in Cullom, Illinois, with an average temperature fluctuating between 25.9°F (-3.4°C) and 36°F (2.2°C). The arrival of December signals a shift in temperature, down from a chilly 47.3°F (8.5°C) in November to a wintry 36°F (2.2°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
January is the coldest month in Cullom, exhibiting average temperatures of 29.8°F (-1.2°C) at the peak and 18.3°F (-7.6°C) at the base.
Throughout the year, in Cullom, Illinois, there are 117.5 rainfall days, and 13.74" (349mm) of precipitation is accumulated.
Months with snowfall are January through April, October through December.
Throughout the year, there are 31.9 snowfall days, and 5.2" (132mm) of snow is accumulated.
January has the least sunshine of the year in Cullom, with an average of 3.8h of sunshine.
The months with the lowest UV index are January and December, with an average maximum UV index of 1.
The months with the least rainfall are February and November Rain falls for 3.7 days and accumulates 0.63" (16mm) of rain.
The month with the most snowfall in Cullom is February, when snow falls for 7.4 days and typically aggregates up to 1.26" (32mm) of snow.
On Sunday, March 10. 2024, at 2:00 am, Daylight Saving Time starts in Cullom, 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 in Cullom, Illinois, is May, when the rain falls for 14.8 days and typically aggregates up to 2.09" (53mm) of precipitation.
May through September are months without snowfall in Cullom, Illinois.
June has the longest days of the year, with an average of 15h and 6min of daylight.
June through August, with an average maximum UV index of 6, are months with the highest UV index.
In Cullom, July is the month with the highest recorded average temperatures, measuring a high of 81.1°F (27.3°C) and a low of 64.6°F (18.1°C).
The most humid month is July, with an average relative humidity of 85%.
August has the most sunshine of the year in Cullom, Illinois, with an average of 9.8h of sunshine.
With an average relative humidity of 71%, October is the least humid month in Cullom.
December has the shortest days of the year in Cullom, with an average of 9h and 18min of daylight.
Average temperature
Cullom, IL
The warmest month (with the highest average high temperature) is July (81.1°F).
The month with the lowest average high temperature is January (29.8°F).
The month with the highest average low temperature is July (64.6°F).
The coldest month (with the lowest average low temperature) is January (18.3°F).
Average pressure
Cullom, IL
- Average pressure in January:
30.13"Hg - Average pressure in February:
30.11"Hg - Average pressure in March:
30.08"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:
30.11"Hg - Average pressure in December:
30.11"Hg
The month with the highest atmospheric pressure is January (30.13"Hg).
The month with the lowest atmospheric pressure is June (29.92"Hg).
Average wind speed
Cullom, IL
- Average wind speed in January:
10.3mph - Average wind speed in February:
10.2mph - Average wind speed in March:
10mph - Average wind speed in April:
10.3mph - Average wind speed in May:
8.8mph - Average wind speed in June:
7.7mph
- Average wind speed in July:
6.4mph - Average wind speed in August:
6.2mph - Average wind speed in September:
7.3mph - Average wind speed in October:
9.2mph - Average wind speed in November:
9.9mph - Average wind speed in December:
9.8mph
The windiest months (with the highest average wind speed) are January and April (10.3mph).
The calmest month (with the lowest average wind speed) is August (6.2mph).
Average humidity
Cullom, IL
The month with the highest relative humidity is July (85%).
The month with the lowest relative humidity is October (71%).
Average rainfall
Cullom, IL
- Average rainfall in January:
0.71" - Average rainfall in February:
0.63" - Average rainfall in March:
0.91" - Average rainfall in April:
1.38" - Average rainfall in May:
2.09" - Average rainfall in June:
1.57"
- Average rainfall in July:
1.54" - Average rainfall in August:
1.22" - Average rainfall in September:
1.02" - Average rainfall in October:
1.34" - Average rainfall in November:
0.63" - Average rainfall in December:
0.71"
The wettest month (with the highest rainfall) is May (2.09").
The driest months (with the least rainfall) are February and November (0.63").
Average rainfall days
Cullom, IL
- Average rainfall days in January:
4.6 days - Average rainfall days in February:
3.7 days - Average rainfall days in March:
8.8 days - Average rainfall days in April:
12 days - Average rainfall days in May:
14.8 days - Average rainfall days in June:
14.4 days
- Average rainfall days in July:
14.8 days - Average rainfall days in August:
12.8 days - Average rainfall days in September:
9.9 days - Average rainfall days in October:
8.9 days - Average rainfall days in November:
6.8 days - Average rainfall days in December:
6 days
The months with the highest number of rainy days are May and July (14.8 days).
The month with the least rainy days is February (3.7 days).
Average snowfall
Cullom, IL
The month with the highest snowfall is February (1.26").
The months with the least snowfall are May, June, July, August and September (0").
Average snowfall days
Cullom, IL
- Average snowfall days in January:
9.9 days - Average snowfall days in February:
7.4 days - Average snowfall days in March:
4.4 days - Average snowfall days in April:
1.3 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:
2.4 days - Average snowfall days in December:
6.1 days
The month with the highest number of snowfall days is January (9.9 days).
The months with the least snowfall days are May, June, July, August and September (0 days).
Average daylight / Average sunshine
Cullom, IL
- Average daylight in January:
9h and 36min - Average daylight in February:
10h and 42min - Average daylight in March:
12h and 0min - Average daylight in April:
13h and 18min - Average daylight in May:
14h and 30min - Average daylight in June:
15h and 6min
- 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 54min - Average daylight in December:
9h and 18min
The month with the longest days is June (Average daylight: 15h and 6min).
The month with the shortest days is December (Average daylight: 9h and 18min).
- Average sunshine in January:
3h and 48min - Average sunshine in February:
4h and 0min - Average sunshine in March:
6h and 6min - Average sunshine in April:
7h and 42min - Average sunshine in May:
8h and 42min - Average sunshine in June:
9h and 42min
- Average sunshine in July:
9h and 30min - Average sunshine in August:
9h and 48min - Average sunshine in September:
8h and 48min - Average sunshine in October:
5h and 54min - Average sunshine in November:
5h and 12min - Average sunshine in December:
4h and 12min
The month with the most sunshine is August (Average sunshine: 9h and 48min).
The month with the least sunshine is January (Average sunshine: 3h and 48min).
Average sunshine days
Cullom, IL
- Average sunshine days in January:
18.6 days - Average sunshine days in February:
16.6 days - Average sunshine days in March:
17.3 days - Average sunshine days in April:
15.1 days - Average sunshine days in May:
12.8 days - Average sunshine days in June:
12.3 days
- Average sunshine days in July:
11.8 days - Average sunshine days in August:
14.3 days - Average sunshine days in September:
17.3 days - Average sunshine days in October:
19.5 days - Average sunshine days in November:
20.9 days - Average sunshine days in December:
20.4 days
The month with the most sunshine days is November (20.9 days).
The month with the least sunshine days is July (11.8 days).
Average UV index
Cullom, IL
The months with the highest UV index are June, July and August (UV index 6).
The months with the lowest UV index are January and December (UV index 1).
Average cloud cover
Cullom, IL
The month with the most cloud cover is January (Cloud cover 60).
The months with the least cloud cover are August and September (Cloud cover 34).
Average visibility
Cullom, IL
The months with the highest visibility are January, February, March, April, May, June, September, October, November and December (6mi).
The months with the lowest visibility are July and August (5mi).
