Climate and monthly weather forecast
Mason City, IA

Weather in January

January, like December, is another subzero cold winter month in Mason City, Iowa, with temperature in the range of an average high of 22.3°F (-5.4°C) and an average low of 9.9°F (-12.3°C). The coldest month is January, with an average high-temperature of 22.3°F (-5.4°C) and an average low-temperature of 9.9°F (-12.3°C). Weather in January »

Weather in February

February, the last month of the winter in Mason City, is also a subzero cold month, with temperature in the range of an average high of 26.4°F (-3.1°C) and an average low of 13.5°F (-10.3°C). In February, the average high-temperature is practically the same as in January - a still freezing cold 26.4°F (-3.1°C). Weather in February »

Weather in March

The first month of the spring, March, is a wintry month in Mason City, Iowa, with an average temperature ranging between max 41.4°F (5.2°C) and min 27.9°F (-2.3°C). In Mason City, the average high-temperature in March increases considerably from a subzero cold 26.4°F (-3.1°C) in February to a cold 41.4°F (5.2°C). Weather in March »

Weather in April

April is a cool spring month in Mason City, Iowa, with temperature in the range of an average low of 39.7°F (4.3°C) and an average high of 54.9°F (12.7°C). In Mason City, the average high-temperature in April increases from a cold 41.4°F (5.2°C) in March to a cool 54.9°F (12.7°C). Weather in April »

Weather in May

May, the last month of the spring in Mason City, is an enjoyable month, with an average temperature fluctuating between 67.3°F (19.6°C) and 51.3°F (10.7°C). In May, the average high-temperature rises from a fresh 54.9°F (12.7°C) in April to a comfortable 67.3°F (19.6°C). Weather in May »

Weather in June

June, the first month of the summer in Mason City, is a warm month, with an average temperature fluctuating between 76.8°F (24.9°C) and 60.8°F (16°C). In June, the average high-temperature rises from an enjoyable 67.3°F (19.6°C) in May to a warm 76.8°F (24.9°C). Weather in June »

Weather in July

July, like June, in Mason City, Iowa, is a moderately hot summer month, with temperature in the range of an average low of 62.6°F (17°C) and an average high of 79.3°F (26.3°C). July is the warmest month, with an average high-temperature of 79.3°F (26.3°C) and an average low-temperature of 62.6°F (17°C). Weather in July »

Weather in August

August, the last month of the summer in Mason City, is also a moderately hot month, with an average temperature ranging between max 77.4°F (25.2°C) and min 60.3°F (15.7°C). In Mason City, Iowa, the average high-temperature in August is relatively the same as in July - a still moderately hot 77.4°F (25.2°C). Weather in August »

Weather in September

The first month of the autumn, September, is also an agreeable month in Mason City, Iowa, with an average temperature ranging between min 53.8°F (12.1°C) and max 72.3°F (22.4°C). In September, the average high-temperature is essentially the same as in August - a pleasant 72.3°F (22.4°C). Weather in September »

Weather in October

October, like September, is a moderate autumn month in Mason City, Iowa, with an average temperature ranging between min 42.3°F (5.7°C) and max 57.4°F (14.1°C). In Mason City, Iowa, the average high-temperature in October plummets from an agreeable 72.3°F (22.4°C) in September to a mild 57.4°F (14.1°C). Weather in October »

Weather in November

The last month of the autumn, November, is another cold month in Mason City, Iowa, with an average temperature ranging between max 42.6°F (5.9°C) and min 30.2°F (-1°C). In November, the average high-temperature plummets from a moderate 57.4°F (14.1°C) in October to a wintry 42.6°F (5.9°C). Weather in November »

Weather in December

The first month of the winter, December, is also a subzero cold month in Mason City, Iowa, with an average temperature fluctuating between 28.2°F (-2.1°C) and 17.8°F (-7.9°C). In December, the average high-temperature declines considerably from a cold 42.6°F (5.9°C) in November to a subzero cold 28.2°F (-2.1°C). Weather in December »
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FAQ

What is the coldest month in Mason City?

The coldest month in Mason City is January, with an average high-temperature of 22.3°F (-5.4°C) and an average low-temperature of 9.9°F (-12.3°C).

What is the most humid month in Mason City?

The most humid month is January, with an average relative humidity of 89%.

What is the driest month in Mason City?

January is the month with the least rainfall. Rain falls for 4.5 days and accumulates 1.06" (27mm) of precipitation.

How much does it rain in Mason City?

Throughout the year, there are 145.9 rainfall days, and 28.82" (732mm) of precipitation is accumulated.

When does it snow in Mason City?

Months with snowfall are January through May, October through December.

How much does it snow in Mason City?

Throughout the year, in Mason City, there are 60.2 snowfall days, and 26.26" (667mm) of snow is accumulated.

What is the month with the least sunshine in Mason City?

With an average of 3.5h of sunshine, January has the least sunshine of the year.

What are the months with the lowest UV index in Mason City?

The months with the lowest UV index are January and December, with an average maximum UV index of 1.

What is the snowiest month in Mason City?

February is the month with the most snowfall in Mason City. Snow falls for 12.9 days and accumulates 7.48" (190mm) of snow.

When is Daylight Saving Time (DST) in Mason City?

On Sunday, March 13. 2022, at 2:00 am, Daylight Saving Time starts, and the time zone changes from CST to CDT. Daylight Saving Time ends Sunday, November 6. 2022, at 2:00 am, and the time zone reverts from CDT to CST.

What is the wettest month in Mason City?

June is the month with the most rainfall in Mason City, Iowa. Rain falls for 19.8 days and accumulates 4.65" (118mm) of precipitation.

When it does not snow in Mason City?

In Mason City, Iowa, snow does not fall in June through September.

When are the longest days in Mason City?

The month with the longest days is June, with an average of 15h and 20min of daylight.

When is the highest UV index in Mason City?

With an average maximum UV index of 6, June is the month with the highest UV index in Mason City.

What is the warmest month in Mason City?

The warmest month in Mason City is July, with an average high-temperature of 79.3°F (26.3°C) and an average low-temperature of 62.6°F (17°C).

What month has the most sunshine in Mason City?

With an average of 9.8h of sunshine, July has the most sunshine of the year in Mason City.

What is the least humid month in Mason City?

October is the least humid month in Mason City, with an average relative humidity of 71%.

What is the month with the shortest days in Mason City?

The month with the shortest days in Mason City, Iowa, is December, with an average of 9h and 3min of daylight.

Average temperature
Mason City, IA

Average temperature - Mason City, IA

The warmest month (with the highest average high temperature) is July (79.3°F).
The month with the lowest average high temperature is January (22.3°F).

The month with the highest average low temperature is July (62.6°F).
The coldest month (with the lowest average low temperature) is January (9.9°F).

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Average pressure
Mason City, IA

Average pressure - Mason City, IA

The month with the highest atmospheric pressure is January (30.15"Hg).
The month with the lowest atmospheric pressure is June (29.88"Hg).

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Average wind speed
Mason City, IA

Average wind speed - Mason City, IA

The windiest months (with the highest average wind speed) are January and April (10.9mph).
The calmest months (with the lowest average wind speed) are July and August (7.3mph).

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Average rainfall
Mason City, IA

Average rainfall - Mason City, IA

The wettest month (with the highest rainfall) is June (4.65").
The driest month (with the least rainfall) is January (1.06").

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Average rainfall days
Mason City, IA

Average rainfall days - Mason City, IA

The month with the highest number of rainy days is June (19.8 days).
The month with the least rainy days is February (3.8 days).

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Average snowfall
Mason City, IA

Average snowfall - Mason City, IA

The month with the highest snowfall is February (7.48").
The months with the least snowfall are June, July, August and September (0").

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Average snowfall days
Mason City, IA

Average snowfall days - Mason City, IA

The month with the highest number of snowfall days is January (14.6 days).
The months with the least snowfall days are June, July, August and September (0 days).

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Average daylight / Average sunshine
Mason City, IA

Average daylight / Average sunshine - Mason City, IA

The month with the longest days is June (Average daylight: 15h and 20min).
The month with the shortest days is December (Average daylight: 9h and 3min).

The month with the most sunshine is July (Average sunshine: 9h and 48min).
The month with the least sunshine is January (Average sunshine: 3h and 30min).

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Average sunshine days
Mason City, IA

Average sunshine days - Mason City, IA

The month with the most sunshine days is November (17.2 days).
The month with the least sunshine days is June (8 days).

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Average visibility
Mason City, IA

Average visibility - Mason City, IA

The months with the highest visibility are March, April, May, June, August, September, October and November (6mi).
The months with the lowest visibility are January, February, July and December (5mi).

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