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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, like December, in Mason, Illinois, is another cold winter month, with an average temperature ranging between max 35.6°F (2°C) and min 23.4°F (-4.8°C). January is the coldest month, with the temperature often reaching an average high of 35.6°F (2°C) and an average low of 23.4°F (-4.8°C). Weather in January »
Weather in February
The last month of the winter, February, is another cold month in Mason, Illinois, with an average temperature varying between 40.3°F (4.6°C) and 26.6°F (-3°C). The commencement of February brings an average high-temperature of a still cold 40.3°F (4.6°C), marking an inconsequential divergence from January. Weather in February »
Weather in March
March, the first month of the spring in Mason, is a cool month, with an average temperature fluctuating between 52.2°F (11.2°C) and 36.9°F (2.7°C). A shift in the average high-temperature is noticeable in March, changing from a cold 40.3°F (4.6°C) in February to a fresh 52.2°F (11.2°C). Weather in March »
Weather in April
April in Mason, Illinois, is a refreshing spring month, with temperature in the range of an average high of 63.5°F (17.5°C) and an average low of 46.6°F (8.1°C). April's arrival coincides with a rise in the average high-temperature, moving from March's fresh 52.2°F (11.2°C) to an enjoyable 63.5°F (17.5°C). Weather in April »
Weather in May
The last month of the spring, May, is a moderately hot month in Mason, Illinois, with an average temperature fluctuating between 73.6°F (23.1°C) and 56.8°F (13.8°C). May brings a temperature increase, with average high-temperatures moving from April's enjoyable 63.5°F (17.5°C) to a warm 73.6°F (23.1°C). Weather in May »
Weather in June
The first month of the summer, June, is still a warm month in Mason, Illinois, with temperature in the range of an average low of 65.5°F (18.6°C) and an average high of 81.7°F (27.6°C). Entering June, Mason notices a subtle temperature elevation, with the average high-temperature advancing from May's 73.6°F (23.1°C) to a still moderately hot 81.7°F (27.6°C). Weather in June »
Weather in July
July, like June, in Mason, Illinois, is another warm summer month, with an average temperature varying between 83.7°F (28.7°C) and 67.1°F (19.5°C). Mason notes the warmest temperatures in July, with a high average of 83.7°F (28.7°C) and a low of 67.1°F (19.5°C). The heat index in July is computed to be a tropical 93.2°F (34°C). Weather in July »
Weather in August
The last month of the summer, August, is also a moderately hot month in Mason, Illinois, with an average temperature fluctuating between 82.2°F (27.9°C) and 64.9°F (18.3°C). The onset of August notes an average high-temperature of a still moderately hot 82.2°F (27.9°C), subtly shifted from July's 83.7°F (28.7°C). Weather in August »
Weather in September
The first month of the autumn, September, is also a moderately hot month in Mason, Illinois, with temperature in the range of an average low of 59.4°F (15.2°C) and an average high of 77.5°F (25.3°C). The advent of September signifies a minor shift to an average high-temperature of a still moderately hot 77.5°F (25.3°C), aligning closely with August. Weather in September »
Weather in October
October, like September, in Mason, Illinois, is another enjoyable autumn month, with temperature in the range of an average low of 48.6°F (9.2°C) and an average high of 65.1°F (18.4°C). A shift in the average high-temperature occurs in October, reducing from a warm 77.5°F (25.3°C) in September to a comfortable 65.1°F (18.4°C). Weather in October »
Weather in November
The last month of the autumn, November, is also a fresh month in Mason, Illinois, with temperature in the range of an average low of 37°F (2.8°C) and an average high of 51.4°F (10.8°C). November comes with a decrease in the average high-temperature, falling from an enjoyable 65.1°F (18.4°C) in October to a fresh 51.4°F (10.8°C). Weather in November »
Weather in December
December, the first month of the winter in Mason, is also a wintry month, with an average temperature fluctuating between 29.3°F (-1.5°C) and 40.6°F (4.8°C). Mason in December undergoes a mild reduction in the average high-temperature, shifting from November's cool 51.4°F (10.8°C) to an icy 40.6°F (4.8°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
What are the coldest months in Mason?
The coldest period in Mason is January, when temperatures fluctuate between an average high of 35.6°F (2°C) and a low of 23.4°F (-4.8°C).
How much does it rain in Mason?
In Mason, Illinois, during the entire year, the rain falls for 141.3 days and collects up to 26.77" (680mm) of precipitation.
When does it snow in Mason?
Months with snowfall in Mason are January through March, November and December.
What is the snowiest month in Mason?
January is the month with the most snowfall. Snow falls for 5.3 days and accumulates 2.01" (51mm) of snow.
How many days does it snow in Mason?
Throughout the year, in Mason, there are 17.7 snowfall days, and 6.73" (171mm) of snow is accumulated.
What is the month with the least sunshine in Mason?
January has the least sunshine of the year, with an average of 4.3h of sunshine.
When is the lowest UV index in Mason?
The months with the lowest UV index are January, February, November and December, with an average maximum UV index of 2.
What is the driest month in Mason?
February is the month with the least rainfall. Rain falls for 7.6 days and accumulates 1.38" (35mm) of precipitation.
When is Daylight Saving Time (DST) in Mason?
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.
What is the rainiest month in Mason?
The month with the most rainfall is April, when the rain falls for 14.3 days and typically aggregates up to 3.35" (85mm) of precipitation.
When it does not snow in Mason?
April through October are months without snowfall.
When are the longest days in Mason?
The month with the longest days is June, with an average of 14h and 54min of daylight.
What month has the most sunshine in Mason?
June has the most sunshine of the year, with an average of 10.5h of sunshine.
What are the months with the highest UV index in Mason?
June through August, with an average maximum UV index of 6, are months with the highest UV index in Mason.
What month is the hottest in Mason?
In Mason, Illinois, the peak average temperatures are observed in July, with a high of 83.7°F (28.7°C) and a low of 67.1°F (19.5°C).
What are the most humid months in Mason?
The months with the highest humidity are July and August, with an average relative humidity of 81%.
What is the least humid month in Mason?
With an average relative humidity of 71%, October is the least humid month in Mason.
What is the month with the shortest days in Mason?
December has the shortest days of the year, with an average of 9h and 30min of daylight.
Average temperature
Mason, IL
The warmest month (with the highest average high temperature) is July (83.7°F).
The month with the lowest average high temperature is January (35.6°F).
The month with the highest average low temperature is July (67.1°F).
The coldest month (with the lowest average low temperature) is January (23.4°F).
Average pressure
Mason, IL
- Average pressure in January:
30.16"Hg - Average pressure in February:
30.12"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:
29.93"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:
30.03"Hg - Average pressure in November:
30.13"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 (29.93"Hg).
Average wind speed
Mason, IL
- Average wind speed in January:
10.3mph - Average wind speed in February:
10.3mph - Average wind speed in March:
10mph - Average wind speed in April:
10mph - Average wind speed in May:
8.3mph - Average wind speed in June:
7.1mph
- Average wind speed in July:
6mph - Average wind speed in August:
6mph - Average wind speed in September:
6.7mph - Average wind speed in October:
8.7mph - Average wind speed in November:
9.4mph - Average wind speed in December:
9.4mph
The windiest months (with the highest average wind speed) are January and February (10.3mph).
The calmest months (with the lowest average wind speed) are July and August (6mph).
Average humidity
Mason, IL
The months with the highest relative humidity are July and August (81%).
The month with the lowest relative humidity is October (71%).
Average rainfall
Mason, IL
- Average rainfall in January:
1.77" - Average rainfall in February:
1.38" - Average rainfall in March:
2.32" - Average rainfall in April:
3.35" - Average rainfall in May:
2.91" - Average rainfall in June:
3.11"
- Average rainfall in July:
2.56" - Average rainfall in August:
2.32" - Average rainfall in September:
1.54" - Average rainfall in October:
2.05" - Average rainfall in November:
1.69" - Average rainfall in December:
1.77"
The wettest month (with the highest rainfall) is April (3.35").
The driest month (with the least rainfall) is February (1.38").
Average rainfall days
Mason, IL
- Average rainfall days in January:
7.3 days - Average rainfall days in February:
7.6 days - Average rainfall days in March:
13.3 days - Average rainfall days in April:
14.3 days - Average rainfall days in May:
17.5 days - Average rainfall days in June:
14.5 days
- Average rainfall days in July:
15.8 days - Average rainfall days in August:
12.5 days - Average rainfall days in September:
10.8 days - Average rainfall days in October:
10.2 days - Average rainfall days in November:
8.9 days - Average rainfall days in December:
8.6 days
The month with the highest number of rainy days is May (17.5 days).
The month with the least rainy days is January (7.3 days).
Average snowfall
Mason, IL
The month with the highest snowfall is January (2.01").
The months with the least snowfall are April, May, June, July, August, September and October (0").
Average snowfall days
Mason, IL
- Average snowfall days in January:
5.3 days - Average snowfall days in February:
4.8 days - Average snowfall days in March:
2.3 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 days - Average snowfall days in November:
1.3 days - Average snowfall days in December:
3.7 days
The month with the highest number of snowfall days is January (5.3 days).
The months with the least snowfall days are May, June, July, August, September and October (0 days).
Average daylight / Average sunshine
Mason, 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 2min - Average sunshine in February:
4h and 3min - Average sunshine in March:
6h and 2min - Average sunshine in April:
8h and 1min - Average sunshine in May:
9h and 1min - Average sunshine in June:
10h and 3min
- Average sunshine in July:
10h and 1min - Average sunshine in August:
10h and 0min - Average sunshine in September:
9h and 1min - Average sunshine in October:
6h and 2min - Average sunshine in November:
5h and 2min - Average sunshine in December:
4h and 4min
The month with the most sunshine is June (Average sunshine: 10h and 30min).
The month with the least sunshine is January (Average sunshine: 4h and 18min).
Average sunshine days
Mason, IL
- Average sunshine days in January:
18.9 days - Average sunshine days in February:
15.8 days - Average sunshine days in March:
15.7 days - Average sunshine days in April:
13.9 days - Average sunshine days in May:
10.8 days - Average sunshine days in June:
12.4 days
- Average sunshine days in July:
13.1 days - Average sunshine days in August:
15.3 days - Average sunshine days in September:
17.1 days - Average sunshine days in October:
19.3 days - Average sunshine days in November:
18.8 days - Average sunshine days in December:
19.5 days
The month with the most sunshine days is December (19.5 days).
The month with the least sunshine days is May (10.8 days).
Average UV index
Mason, 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, November and December (UV index 2).
Average cloud cover
Mason, IL
The month with the most cloud cover is January (Cloud cover 53).
The months with the least cloud cover are June and September (Cloud cover 29).
Average visibility
Mason, 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).
Mason, Illinois, USA
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