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Contents
- Weather in January
- Weather in February
- Weather in March
- Weather in April
- Weather in May
- Weather in June
- Weather in July
- Weather in August
- Weather in September
- Weather in October
- Weather in November
- Weather in December
- Frequently asked questions
- Average temperature
- Average pressure
- Average wind speed
- Average humidity
- Average rainfall
- Average rainfall days
- Average snowfall
- Average snowfall days
- Average daylight
- Average sunshine
- Average sunshine days
- Average UV index
- Average cloud cover
- Average visibility
Weather in January
January, the same as December, is an icy winter month in Brussels, Illinois, with an average temperature ranging between min 23.4°F (-4.8°C) and max 36.1°F (2.3°C). January, with an average high of 36.1°F (2.3°C) and a low of 23.4°F (-4.8°C), signifies the coldest month of the year. Weather in January »
Weather in February
The last month of the winter, February, is another cold month in Brussels, Illinois, with an average temperature ranging between max 41°F (5°C) and min 27°F (-2.8°C). With the advent of February, Brussels's high-temperatures adjust to a still wintry 41°F (5°C), closely aligning with the preceding month. Weather in February »
Weather in March
March, the first month of the spring in Brussels, is a cool month, with an average temperature fluctuating between 53.6°F (12°C) and 37.6°F (3.1°C). As March arrives, a rise in the average high-temperature is observed, moving from a wintry 41°F (5°C) in February to a fresh 53.6°F (12°C). Weather in March »
Weather in April
April in Brussels, Illinois, is an enjoyable spring month, with an average temperature fluctuating between 64.9°F (18.3°C) and 47.1°F (8.4°C). With the transition into April, Brussels experiences an increase in average high-temperatures, moving up from a cool 53.6°F (12°C) in March to a refreshing 64.9°F (18.3°C). Weather in April »
Weather in May
May, the last month of the spring in Brussels, is a warm month, with an average temperature varying between 74.1°F (23.4°C) and 56.8°F (13.8°C). The transition to May introduces an increase in the average high-temperature, shifting from a refreshing 64.9°F (18.3°C) in April to a warm 74.1°F (23.4°C). Weather in May »
Weather in June
The first month of the summer, June, is also a moderately hot month in Brussels, Illinois, with temperature in the range of an average high of 83.3°F (28.5°C) and an average low of 65.8°F (18.8°C). The arrival of June signals an increase in the average high-temperature, moving from a moderately hot 74.1°F (23.4°C) in May to a still warm 83.3°F (28.5°C). Weather in June »
Weather in July
July is a tropical summer month in Brussels, Illinois, with temperature in the range of an average low of 68.2°F (20.1°C) and an average high of 86.4°F (30.2°C). In Brussels, July records the highest average temperatures, peaking at 86.4°F (30.2°C) and reaching a low of 68.2°F (20.1°C). July's mean heat index is calculated to be a very hot 100.4°F (38°C). Weather in July »
Weather in August
The last month of the summer, August, is also a moderately hot month in Brussels, Illinois, with an average temperature varying between 84.9°F (29.4°C) and 66.4°F (19.1°C). Brussels experiences an average high-temperature of a warm 84.9°F (29.4°C) in August, marking an insignificant shift from 86.4°F (30.2°C) in July. Weather in August »
Weather in September
September, the first month of the autumn in Brussels, is still a warm month, with an average temperature ranging between max 79.2°F (26.2°C) and min 59.7°F (15.4°C). Brussels in September undergoes a slight reduction in the average high-temperature, shifting from August's 84.9°F (29.4°C) to a still moderately hot 79.2°F (26.2°C). Weather in September »
Weather in October
October, the same as September, is another enjoyable autumn month in Brussels, Illinois, with temperature in the range of an average low of 48.6°F (9.2°C) and an average high of 65.8°F (18.8°C). The transition into October is accompanied by a temperature decrease, with the average high-temperature shifting from a warm 79.2°F (26.2°C) in September to a refreshing 65.8°F (18.8°C). Weather in October »
Weather in November
The last month of the autumn, November, is another cool month in Brussels, Illinois, with an average temperature varying between 37.6°F (3.1°C) and 52.7°F (11.5°C). With the beginning of November, the average high-temperature shows a decrease, transitioning from a refreshing 65.8°F (18.8°C) in October to a fresh 52.7°F (11.5°C). Weather in November »
Weather in December
December, the first month of the winter in Brussels, is also an icy month, with an average temperature ranging between min 30°F (-1.1°C) and max 41.5°F (5.3°C). Brussels's weather in December involves a decrease in the average high-temperature, moving down from November's cool 52.7°F (11.5°C) to an icy 41.5°F (5.3°C). Weather in December »
Updated: Aug 26, 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
What time of the year is the coldest?
Brussels's January weather, marked by an average high temperature of 36.1°F (2.3°C) and an average low temperature of 23.4°F (-4.8°C), is the coldest in the year.
How much does it rain?
In Brussels, Illinois, during the entire year, the rain falls for 138.8 days and collects up to 27.6" (701mm) of precipitation.
When does it snow?
Months with snowfall in Brussels are January through March, November and December.
When does it snow the most?
The months with the most snowfall are January and February, with an average 1.54" (39mm) of accumulated snow.
How many days does it snow?
Throughout the year, there are 17.9 snowfall days, and 5.12" (130mm) of snow is accumulated.
What is the month with the least sunshine?
The months with the least sunshine are January and February, with an average of 4.6h of sunshine.
When is the lowest UV index?
The months with the lowest UV index in Brussels are January, February, November and December, with an average maximum UV index of 2.
What is the driest month?
The month with the least rainfall is February, when the rain falls for 6.6 days and typically collects 1.3" (33mm) of precipitation.
When is Daylight Saving Time (DST)?
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.
When it does not snow?
April through October are months without snowfall.
What is the most humid month?
The most humid month is May, with an average relative humidity of 79%.
What is the wettest month in Brussels?
May is the month with the most rainfall. Rain falls for 15.9 days and accumulates 3.35" (85mm) of precipitation.
When is the highest UV index?
The months with the highest UV index are May through August, with an average maximum UV index of 6.
When are the longest days?
June has the longest days of the year, with an average of 14h and 54min of daylight.
What are the months with the most sunshine in Brussels?
June and July, with an average of 10.4h of sunshine, are months with the most sunshine.
What is the hottest time of year?
Brussels experiences its average highest temperatures in July, reaching a peak of 86.4°F (30.2°C) and a minimum of 68.2°F (20.1°C).
What is the least humid month?
October is the least humid month, with an average relative humidity of 71%.
What is the month with the shortest days?
With an average of 9h and 30min of daylight, December has the shortest days of the year.
Average temperature
Brussels, 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 (36.1°F).
The month with the highest average low temperature is July (68.2°F).
The coldest month (with the lowest average low temperature) is January (23.4°F).
Average pressure
Brussels, 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:
29.93"Hg - Average pressure in May:
29.95"Hg - Average pressure in June:
29.92"Hg
- Average pressure in July:
29.97"Hg - Average pressure in August:
29.97"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
Brussels, IL
- Average wind speed in January:
9.4mph - Average wind speed in February:
9.3mph - Average wind speed in March:
9.1mph - Average wind speed in April:
9.1mph - Average wind speed in May:
7.4mph - Average wind speed in June:
6.5mph
- Average wind speed in July:
5.7mph - Average wind speed in August:
5.7mph - Average wind speed in September:
6.2mph - Average wind speed in October:
8mph - Average wind speed in November:
8.8mph - Average wind speed in December:
8.8mph
The windiest month (with the highest average wind speed) is January (9.4mph).
The calmest months (with the lowest average wind speed) are July and August (5.7mph).
Average humidity
Brussels, IL
The month with the highest relative humidity is May (79%).
The month with the lowest relative humidity is October (71%).
Average rainfall
Brussels, IL
- Average rainfall in January:
1.46" - Average rainfall in February:
1.3" - Average rainfall in March:
2.05" - Average rainfall in April:
3.11" - Average rainfall in May:
3.35" - Average rainfall in June:
3.19"
- Average rainfall in July:
2.68" - Average rainfall in August:
2.99" - Average rainfall in September:
2.01" - Average rainfall in October:
2.44" - Average rainfall in November:
1.54" - Average rainfall in December:
1.5"
The wettest month (with the highest rainfall) is May (3.35").
The driest month (with the least rainfall) is February (1.3").
Average rainfall days
Brussels, IL
- Average rainfall days in January:
6.3 days - Average rainfall days in February:
6.6 days - Average rainfall days in March:
13.4 days - Average rainfall days in April:
13.7 days - Average rainfall days in May:
15.9 days - Average rainfall days in June:
15.1 days
- Average rainfall days in July:
16.3 days - Average rainfall days in August:
13.6 days - Average rainfall days in September:
11.6 days - Average rainfall days in October:
10.4 days - Average rainfall days in November:
9.1 days - Average rainfall days in December:
6.8 days
The month with the highest number of rainy days is July (16.3 days).
The month with the least rainy days is January (6.3 days).
Average snowfall
Brussels, IL
The months with the highest snowfall are January and February (1.54").
The months with the least snowfall are April, May, June, July, August, September and October (0").
Average snowfall days
Brussels, IL
- Average snowfall days in January:
5.7 days - Average snowfall days in February:
4.8 days - Average snowfall days in March:
1.8 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:
1.3 days - Average snowfall days in December:
3.9 days
The month with the highest number of snowfall days is January (5.7 days).
The months with the least snowfall days are May, June, July, August and September (0 days).
Average daylight / Average sunshine
Brussels, IL
- Average daylight in January:
9h and 5min - Average daylight in February:
10h and 5min - Average daylight in March:
12h and 0min - Average daylight in April:
13h and 1min - Average daylight in May:
14h and 2min - Average daylight in June:
14h and 5min
- Average daylight in July:
14h and 4min - Average daylight in August:
13h and 4min - Average daylight in September:
12h and 2min - Average daylight in October:
11h and 1min - Average daylight in November:
10h and 1min - Average daylight in December:
9h and 3min
The month with the longest days is June (Average daylight: 14h and 54min).
The month with the shortest days is December (Average daylight: 9h and 30min).
- Average sunshine in January:
4h and 4min - Average sunshine in February:
4h and 4min - Average sunshine in March:
6h and 3min - Average sunshine in April:
8h and 3min - Average sunshine in May:
9h and 2min - Average sunshine in June:
10h and 2min
- Average sunshine in July:
10h and 2min - Average sunshine in August:
10h and 1min - Average sunshine in September:
9h and 2min - Average sunshine in October:
6h and 0min - Average sunshine in November:
5h and 3min - Average sunshine in December:
4h and 5min
The months with the most sunshine are June and July (Average sunshine: 10h and 24min).
The months with the least sunshine are January and February (Average sunshine: 4h and 36min).
Average sunshine days
Brussels, IL
- Average sunshine days in January:
19.3 days - Average sunshine days in February:
16.1 days - Average sunshine days in March:
15.2 days - Average sunshine days in April:
15 days - Average sunshine days in May:
12.7 days - Average sunshine days in June:
11.2 days
- Average sunshine days in July:
12.7 days - Average sunshine days in August:
14.3 days - Average sunshine days in September:
16.4 days - Average sunshine days in October:
19.4 days - Average sunshine days in November:
19.2 days - Average sunshine days in December:
19.8 days
The month with the most sunshine days is December (19.8 days).
The month with the least sunshine days is June (11.2 days).
Average UV index
Brussels, 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, November and December (UV index 2).
Average cloud cover
Brussels, 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
Brussels, 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).
Brussels, Illinois, USA
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