Climate and monthly weather forecastGillum, IL
Climate and monthly weather forecast
Weather in January
January, like December, is a freezing cold winter month in Gillum, Illinois, with an average temperature varying between 18.9°F (-7.3°C) and 30.7°F (-0.7°C). Gillum witnesses the coldest weather in January, with temperatures averaging a high of 30.7°F (-0.7°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 Gillum, Illinois, with an average temperature fluctuating between 22.5°F (-5.3°C) and 35.6°F (2°C). With the advent of February, Gillum experiences an average high-temperature of a cold 35.6°F (2°C), mirroring a close resemblance to the previous month. Weather in February »Weather in March
March, the first month of the spring in Gillum, is a chilly month, with temperature in the range of an average high of 48.6°F (9.2°C) and an average low of 34°F (1.1°C). The shift into March is accompanied by a temperature increase, with the average high-temperature rising from an icy 35.6°F (2°C) in February to a chilly 48.6°F (9.2°C). Weather in March »Weather in April
April in Gillum, Illinois, is a mild spring month, with an average temperature fluctuating between 60.4°F (15.8°C) and 44.2°F (6.8°C). An escalation in the average high-temperature is seen with the onset of April, moving from a chilly 48.6°F (9.2°C) in March to a refreshing 60.4°F (15.8°C). Weather in April »Weather in May
The last month of the spring, May, is a pleasant month in Gillum, Illinois, with an average temperature varying between 72°F (22.2°C) and 55.4°F (13°C). An escalation in the average high-temperature is seen with the onset of May, moving from a moderate 60.4°F (15.8°C) in April to an agreeable 72°F (22.2°C). Weather in May »Weather in June
The first month of the summer, June, is a moderately hot month in Gillum, Illinois, with an average temperature fluctuating between 79.3°F (26.3°C) and 63.1°F (17.3°C). June brings a slight rise in Gillum's average high-temperature, moving from an agreeable 72°F (22.2°C) in May to a warm 79.3°F (26.3°C). Weather in June »Weather in July
July, the same as June, is a moderately hot summer month in Gillum, Illinois, with an average temperature ranging between min 64.9°F (18.3°C) and max 80.8°F (27.1°C). July, with its average high-temperature of 80.8°F (27.1°C) and an average low-temperature of 64.9°F (18.3°C), holds the record as the warmest month. The heat index in July is evaluated at a tropical 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 Gillum, Illinois, with an average temperature ranging between min 63.1°F (17.3°C) and max 79.9°F (26.6°C). The beginning of August records an average high-temperature of a still warm 79.9°F (26.6°C), almost echoing the conditions of the previous month. Weather in August »Weather in September
The first month of the autumn, September, is still a warm month in Gillum, Illinois, with an average temperature fluctuating between 57.4°F (14.1°C) and 75.6°F (24.2°C). The advent of September observes an average high-temperature of a still moderately hot 75.6°F (24.2°C), nearly identical to August's 79.9°F (26.6°C). Weather in September »Weather in October
October, the same as September, is another enjoyable autumn month in Gillum, Illinois, with temperature in the range of an average low of 46.6°F (8.1°C) and an average high of 62.1°F (16.7°C). October's arrival coincides with a drop in the average high-temperature, decreasing from September's moderately hot 75.6°F (24.2°C) to a refreshing 62.1°F (16.7°C). Weather in October »Weather in November
November, the last month of the autumn in Gillum, is also a frosty month, with an average temperature varying between 47.7°F (8.7°C) and 34.7°F (1.5°C). In Gillum, stepping into November signifies a significant temperature decrement, moving down from October's enjoyable 62.1°F (16.7°C) to a chilly 47.7°F (8.7°C). Weather in November »Weather in December
December, the first month of the winter in Gillum, is still a cold month, with an average temperature fluctuating between 36.5°F (2.5°C) and 26.1°F (-3.3°C). The transition into December is accompanied by a temperature decrease, with the average high-temperature shifting from a chilly 47.7°F (8.7°C) in November to a cold 36.5°F (2.5°C). Weather in December »Updated: Aug 18, 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
In Gillum, the lowest temperatures are generally noted in January, averaging a high of 30.7°F (-0.7°C) and a low of 18.9°F (-7.3°C).
In Gillum, during the entire year, the rain falls for 163.1 days and collects up to 33.62" (854mm) of precipitation.
Months with snowfall are January through April, October through December.
The month with the most snowfall is January, when snow falls for 12.8 days and typically aggregates up to 5.04" (128mm) of snow.
In Gillum, during the entire year, snow falls for 40.7 days and aggregates up to 17.01" (432mm) of snow.
The month with the least sunshine is January, with an average of 3.7h of sunshine.
The months with the lowest UV index are January, February, October through December, with an average maximum UV index of 2.
On Sunday, March 10. 2024, at 2:00 am, Daylight Saving Time starts, 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 20.1 days and typically aggregates up to 4.57" (116mm) of precipitation.
May through September are months without snowfall.
The month with the longest days is June, with an average of 15h and 0min of daylight.
The month with the most sunshine is June, with an average of 9.8h of sunshine.
June through August, with an average maximum UV index of 6, are months with the highest UV index.
Gillum's temperatures peak on average in July, reaching 80.8°F (27.1°C) at their highest and 64.9°F (18.3°C) at their lowest.
With an average relative humidity of 86%, July is the most humid month.
The least humid month is October, with an average relative humidity of 71%.
The month with the least rainfall is December, when the rain falls for 9 days and typically collects 1.93" (49mm) of precipitation.
With an average of 9h and 18min of daylight, December has the shortest days of the year.
Average temperature
Gillum, IL
The warmest month (with the highest average high temperature) is July (80.8°F).
The month with the lowest average high temperature is January (30.7°F).
The month with the highest average low temperature is July (64.9°F).
The coldest month (with the lowest average low temperature) is January (18.9°F).
Average pressure
Gillum, IL
- Average pressure in January:
30.14"Hg - Average pressure in February:
30.11"Hg - Average pressure in March:
30.08"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:
30.03"Hg - Average pressure in October:
30.02"Hg - Average pressure in November:
30.11"Hg - Average pressure in December:
30.11"Hg
The month with the highest atmospheric pressure is January (30.14"Hg).
The month with the lowest atmospheric pressure is June (29.92"Hg).
Average wind speed
Gillum, IL
- Average wind speed in January:
11.1mph - Average wind speed in February:
11mph - Average wind speed in March:
10.6mph - Average wind speed in April:
10.9mph - Average wind speed in May:
9.3mph - Average wind speed in June:
8mph
- Average wind speed in July:
6.7mph - Average wind speed in August:
6.6mph - Average wind speed in September:
7.7mph - Average wind speed in October:
9.9mph - Average wind speed in November:
10.6mph - Average wind speed in December:
10.6mph
The windiest month (with the highest average wind speed) is January (11.1mph).
The calmest month (with the lowest average wind speed) is August (6.6mph).
Average humidity
Gillum, IL
The month with the highest relative humidity is July (86%).
The month with the lowest relative humidity is October (71%).
Average rainfall
Gillum, IL
- Average rainfall in January:
1.97" - Average rainfall in February:
2.01" - Average rainfall in March:
2.56" - Average rainfall in April:
3.7" - Average rainfall in May:
4.57" - Average rainfall in June:
4.02"
- Average rainfall in July:
3.15" - Average rainfall in August:
2.68" - Average rainfall in September:
2.2" - Average rainfall in October:
2.76" - Average rainfall in November:
2.09" - Average rainfall in December:
1.93"
The wettest month (with the highest rainfall) is May (4.57").
The driest month (with the least rainfall) is December (1.93").
Average rainfall days
Gillum, IL
- Average rainfall days in January:
7.2 days - Average rainfall days in February:
6.9 days - Average rainfall days in March:
13.8 days - Average rainfall days in April:
17.4 days - Average rainfall days in May:
20.1 days - Average rainfall days in June:
18.5 days
- Average rainfall days in July:
19.2 days - Average rainfall days in August:
15.9 days - Average rainfall days in September:
13.2 days - Average rainfall days in October:
12.2 days - Average rainfall days in November:
9.7 days - Average rainfall days in December:
9 days
The month with the highest number of rainy days is May (20.1 days).
The month with the least rainy days is February (6.9 days).
Average snowfall
Gillum, IL
The month with the highest snowfall is January (5.04").
The months with the least snowfall are May, June, July, August and September (0").
Average snowfall days
Gillum, IL
- Average snowfall days in January:
12.8 days - Average snowfall days in February:
10.1 days - Average snowfall days in March:
4.8 days - Average snowfall days in April:
1.1 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:
3.3 days - Average snowfall days in December:
8.2 days
The month with the highest number of snowfall days is January (12.8 days).
The months with the least snowfall days are May, June, July, August and September (0 days).
Average daylight / Average sunshine
Gillum, IL
- Average daylight in January:
9h and 42min - 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 24min - Average daylight in June:
15h and 0min
- Average daylight in July:
14h and 42min - Average daylight in August:
13h and 42min - Average daylight in September:
12h and 24min - 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 0min).
The month with the shortest days is December (Average daylight: 9h and 18min).
- Average sunshine in January:
3h and 42min - 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 48min
- Average sunshine in July:
9h and 24min - Average sunshine in August:
9h and 36min - Average sunshine in September:
8h and 48min - Average sunshine in October:
5h and 48min - Average sunshine in November:
5h and 6min - Average sunshine in December:
4h and 12min
The month with the most sunshine is June (Average sunshine: 9h and 48min).
The month with the least sunshine is January (Average sunshine: 3h and 42min).
Average sunshine days
Gillum, IL
- Average sunshine days in January:
13 days - Average sunshine days in February:
12.6 days - Average sunshine days in March:
12.7 days - Average sunshine days in April:
10.6 days - Average sunshine days in May:
8.4 days - Average sunshine days in June:
8.8 days
- Average sunshine days in July:
8.8 days - Average sunshine days in August:
11.8 days - Average sunshine days in September:
14.5 days - Average sunshine days in October:
16.4 days - Average sunshine days in November:
17.4 days - Average sunshine days in December:
15 days
The month with the most sunshine days is November (17.4 days).
The month with the least sunshine days is May (8.4 days).
Average UV index
Gillum, 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, February, October, November and December (UV index 2).
Average cloud cover
Gillum, 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 33).
Average visibility
Gillum, IL
The months with the highest visibility are February, March, April, May, June, September, October, November and December (6mi).
The months with the lowest visibility are January, July and August (5mi).
