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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 a wintry winter month in Mason City, Illinois, with temperature in the range of an average low of 19.9°F (-6.7°C) and an average high of 32°F (0°C). January is the coldest month, with an average high-temperature of 32°F (0°C) and an average low-temperature of 19.9°F (-6.7°C). Weather in January »
Weather in February
The last month of the winter, February, is another cold month in Mason City, Illinois, with an average temperature varying between 37.2°F (2.9°C) and 24.1°F (-4.4°C). As Mason City welcomes February, the average high-temperature records at a still wintry 37.2°F (2.9°C), marking an insignificant deviation from the prior month. Weather in February »
Weather in March
The first month of the spring, March, is a fresh month in Mason City, Illinois, with temperature in the range of an average high of 50°F (10°C) and an average low of 35.1°F (1.7°C). In Mason City, stepping into March brings a temperature increase, moving up from February's icy 37.2°F (2.9°C) to a cool 50°F (10°C). Weather in March »
Weather in April
April is an enjoyable spring month in Mason City, Illinois, with temperature in the range of an average low of 45.5°F (7.5°C) and an average high of 61.7°F (16.5°C). April marks a rise in the average high-temperature, moving from March's fresh 50°F (10°C) to a comfortable 61.7°F (16.5°C). Weather in April »
Weather in May
May, the last month of the spring in Mason City, is a pleasant month, with an average temperature fluctuating between 72.5°F (22.5°C) and 55.9°F (13.3°C). The arrival of May signals an increase in the average high-temperature, moving from a refreshing 61.7°F (16.5°C) in April to a pleasant 72.5°F (22.5°C). Weather in May »
Weather in June
The first month of the summer, June, is a warm month in Mason City, Illinois, with an average temperature varying between 80.8°F (27.1°C) and 63.9°F (17.7°C). June brings a slight rise in Mason City's average high-temperature, moving from an agreeable 72.5°F (22.5°C) in May to a warm 80.8°F (27.1°C). Weather in June »
Weather in July
July, like June, in Mason City, Illinois, is a moderately hot summer month, with an average temperature fluctuating between 65.8°F (18.8°C) and 82.4°F (28°C). July, with average temperatures reaching a high of 82.4°F (28°C) and a low of 65.8°F (18.8°C), is the warmest month. July's mean heat index is appraised at a tropical 91.4°F (33°C). Weather in July »
Weather in August
August, the last month of the summer in Mason City, is another warm month, with an average temperature ranging between min 64°F (17.8°C) and max 81.9°F (27.7°C). With the start of August, Mason City measures an average high-temperature of a still warm 81.9°F (27.7°C), not significantly differing from July's 82.4°F (28°C). Weather in August »
Weather in September
September, the first month of the autumn in Mason City, is still a warm month, with an average temperature ranging between max 76.8°F (24.9°C) and min 58.5°F (14.7°C). The introduction of September notes a subtle temperature variation to a still warm 76.8°F (24.9°C) from August's 81.9°F (27.7°C). Weather in September »
Weather in October
October, like September, in Mason City, Illinois, is another refreshing autumn month, with an average temperature ranging between max 63.7°F (17.6°C) and min 47.3°F (8.5°C). October brings a decrease in the average high-temperature, falling from September's warm 76.8°F (24.9°C) to a refreshing 63.7°F (17.6°C). Weather in October »
Weather in November
The last month of the autumn, November, is also a frosty month in Mason City, Illinois, with an average temperature ranging between min 35.4°F (1.9°C) and max 49.6°F (9.8°C). The start of November comes with a reduction in the average high-temperature, receding from a comfortable 63.7°F (17.6°C) in October to a frosty 49.6°F (9.8°C). Weather in November »
Weather in December
The first month of the winter, December, is also an icy month in Mason City, Illinois, with temperature in the range of an average low of 27.1°F (-2.7°C) and an average high of 38.3°F (3.5°C). December comes with a drop in the average high-temperature, falling from November's frosty 49.6°F (9.8°C) to an icy 38.3°F (3.5°C). Weather in December »
[Resources]Frequently asked questions
What are the coldest months in Mason City?
In Mason City, January registers the lowest temperatures, averaging 32°F (0°C) at the peak and 19.9°F (-6.7°C) at the lowest.
How many days does it rain in Mason City?
Throughout the year, in Mason City, Illinois, there are 150 rainfall days, and 29.84" (758mm) of precipitation is accumulated.
When does it snow in Mason City?
Months with snowfall in Mason City are January through April, October through December.
What is the snowiest month in Mason City?
January is the month with the most snowfall. Snow falls for 10.7 days and accumulates 3.98" (101mm) of snow.
How much does it snow in Mason City?
In Mason City, during the entire year, snow falls for 31.9 days and aggregates up to 11.06" (281mm) of snow.
What is the month with the least sunshine in Mason City?
January has the least sunshine of the year, with an average of 4.1h of sunshine.
When is the lowest UV index in Mason City?
January, February, November and December, with an average maximum UV index of 2, are months with the lowest UV index.
When is Daylight Saving Time (DST) in Mason City?
On Sunday, March 10. 2024, at 2:00 am, Daylight Saving Time starts in Mason City, 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 wettest month in Mason City?
The month with the most rainfall is May, when the rain falls for 18.9 days and typically aggregates up to 3.98" (101mm) of precipitation.
When it does not snow in Mason City?
May through September are months without snowfall in Mason City, Illinois.
When are the longest days in Mason City?
With an average of 15h and 0min of daylight, June has the longest days of the year in Mason City, Illinois.
What month has the most sunshine in Mason City?
With an average of 10.3h of sunshine, June has the most sunshine of the year in Mason City, Illinois.
What are the months with the highest UV index in Mason City?
June through August, with an average maximum UV index of 6, are months with the highest UV index in Mason City.
What time of the year is the hottest in Mason City?
July, marked by an average high-temperature of 82.4°F (28°C) and a low-temperature of 65.8°F (18.8°C), is the warmest month in Mason City.
What is the most humid month in Mason City?
July is the most humid month in Mason City, Illinois, with an average relative humidity of 84%.
What is the least humid month in Mason City?
The least humid month in Mason City is October, with an average relative humidity of 70%.
What is the driest month in Mason City?
The month with the least rainfall in Mason City is December, when the rain falls for 8.1 days and typically collects 1.46" (37mm) of precipitation.
What is the month with the shortest days in Mason City?
December has the shortest days of the year in Mason City, with an average of 9h and 24min of daylight.
Average temperature
Mason City, IL
The warmest month (with the highest average high temperature) is July (82.4°F).
The month with the lowest average high temperature is January (32°F).
The month with the highest average low temperature is July (65.8°F).
The coldest month (with the lowest average low temperature) is January (19.9°F).
Average pressure
Mason City, IL
- Average pressure in January:
30.14"Hg - Average pressure in February:
30.12"Hg - Average pressure in March:
30.08"Hg - Average pressure in April:
29.94"Hg - Average pressure in May:
29.95"Hg - Average pressure in June:
29.91"Hg
- Average pressure in July:
29.97"Hg - Average pressure in August:
29.97"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:
30.12"Hg
The month with the highest atmospheric pressure is January (30.14"Hg).
The month with the lowest atmospheric pressure is June (29.91"Hg).
Average wind speed
Mason City, IL
- Average wind speed in January:
10.3mph - Average wind speed in February:
10.3mph - Average wind speed in March:
10.1mph - Average wind speed in April:
10.4mph - Average wind speed in May:
8.6mph - Average wind speed in June:
7.5mph
- Average wind speed in July:
6.3mph - Average wind speed in August:
6.3mph - Average wind speed in September:
7.3mph - Average wind speed in October:
9.1mph - Average wind speed in November:
9.9mph - Average wind speed in December:
9.7mph
The windiest month (with the highest average wind speed) is April (10.4mph).
The calmest months (with the lowest average wind speed) are July and August (6.3mph).
Average humidity
Mason City, IL
The month with the highest relative humidity is July (84%).
The month with the lowest relative humidity is October (70%).
Average rainfall
Mason City, IL
- Average rainfall in January:
1.77" - Average rainfall in February:
1.73" - Average rainfall in March:
2.4" - Average rainfall in April:
3.46" - Average rainfall in May:
3.98" - Average rainfall in June:
3.31"
- Average rainfall in July:
2.28" - Average rainfall in August:
2.2" - Average rainfall in September:
2.56" - Average rainfall in October:
2.76" - Average rainfall in November:
1.93" - Average rainfall in December:
1.46"
The wettest month (with the highest rainfall) is May (3.98").
The driest month (with the least rainfall) is December (1.46").
Average rainfall days
Mason City, IL
- Average rainfall days in January:
7 days - Average rainfall days in February:
6.2 days - Average rainfall days in March:
13.2 days - Average rainfall days in April:
16.1 days - Average rainfall days in May:
18.9 days - Average rainfall days in June:
16.8 days
- Average rainfall days in July:
16.3 days - Average rainfall days in August:
13.4 days - Average rainfall days in September:
12.2 days - Average rainfall days in October:
12.4 days - Average rainfall days in November:
9.4 days - Average rainfall days in December:
8.1 days
The month with the highest number of rainy days is May (18.9 days).
The month with the least rainy days is February (6.2 days).
Average snowfall
Mason City, IL
The month with the highest snowfall is January (3.98").
The months with the least snowfall are May, June, July, August and September (0").
Average snowfall days
Mason City, IL
- Average snowfall days in January:
10.7 days - Average snowfall days in February:
8.2 days - Average snowfall days in March:
3.7 days - Average snowfall days in April:
0.9 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:
2.3 days - Average snowfall days in December:
6 days
The month with the highest number of snowfall days is January (10.7 days).
The months with the least snowfall days are May, June, July, August and September (0 days).
Average daylight / Average sunshine
Mason City, IL
- Average daylight in January:
9h and 4min - Average daylight in February:
10h and 4min - Average daylight in March:
12h and 0min - Average daylight in April:
13h and 2min - Average daylight in May:
14h and 2min - Average daylight in June:
15h and 0min
- 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 0min - Average daylight in December:
9h and 2min
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 24min).
- Average sunshine in January:
4h and 1min - Average sunshine in February:
4h and 2min - Average sunshine in March:
6h and 4min - Average sunshine in April:
8h and 2min - Average sunshine in May:
9h and 2min - Average sunshine in June:
10h and 2min
- Average sunshine in July:
10h and 1min - Average sunshine in August:
10h and 0min - Average sunshine in September:
9h and 2min - Average sunshine in October:
5h and 5min - 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 18min).
The month with the least sunshine is January (Average sunshine: 4h and 6min).
Average sunshine days
Mason City, IL
- Average sunshine days in January:
15.3 days - Average sunshine days in February:
14.5 days - Average sunshine days in March:
14.3 days - Average sunshine days in April:
11.5 days - Average sunshine days in May:
10.5 days - Average sunshine days in June:
11.3 days
- Average sunshine days in July:
11.5 days - Average sunshine days in August:
15.7 days - Average sunshine days in September:
16.3 days - Average sunshine days in October:
16.9 days - Average sunshine days in November:
18.5 days - Average sunshine days in December:
18 days
The month with the most sunshine days is November (18.5 days).
The month with the least sunshine days is May (10.5 days).
Average UV index
Mason City, 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 City, IL
The month with the most cloud cover is January (Cloud cover 55).
The months with the least cloud cover are August and September (Cloud cover 29).
Average visibility
Mason City, 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).
Mason City, Illinois, USA
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