Climate and monthly weather forecast
Fairfax, IA

Weather in January

January, like December, is a freezing cold winter month in Fairfax, Iowa, with temperature in the range of an average low of 14.2°F (-9.9°C) and an average high of 26.2°F (-3.2°C). With an average high-temperature of 26.2°F (-3.2°C) and an average low-temperature of 14.2°F (-9.9°C), January is the coldest month. Weather in January »

Weather in February

February, the last month of the winter in Fairfax, is also a subzero cold month, with an average temperature ranging between min 17.6°F (-8°C) and max 30.6°F (-0.8°C). In February, the average high-temperature is relatively the same as in January - a still subzero cold 30.6°F (-0.8°C). Weather in February »

Weather in March

March, the first month of the spring in Fairfax, is a frosty month, with temperature in the range of an average low of 30.6°F (-0.8°C) and an average high of 45.7°F (7.6°C). In March, the average high-temperature soars, from a freezing cold 30.6°F (-0.8°C) in February, to a frosty 45.7°F (7.6°C). Weather in March »

Weather in April

April in Fairfax, Iowa, is a moderate spring month, with an average temperature varying between 57.9°F (14.4°C) and 41.4°F (5.2°C). In April, the average high-temperature rises from a chilly 45.7°F (7.6°C) in March to a moderate 57.9°F (14.4°C). Weather in April »

Weather in May

May, the last month of the spring in Fairfax, is an agreeable month, with temperature in the range of an average low of 52.3°F (11.3°C) and an average high of 68.9°F (20.5°C). In Fairfax, the average high-temperature in May increases from a mild 57.9°F (14.4°C) in April to an agreeable 68.9°F (20.5°C). Weather in May »

Weather in June

June, the first month of the summer in Fairfax, is a moderately hot month, with temperature in the range of an average high of 78.1°F (25.6°C) and an average low of 61.5°F (16.4°C). In Fairfax, the average high-temperature in June increases from an agreeable 68.9°F (20.5°C) in May to a warm 78.1°F (25.6°C). Weather in June »

Weather in July

July, the same as June, is another warm summer month in Fairfax, Iowa, with an average temperature ranging between min 64.6°F (18.1°C) and max 80.8°F (27.1°C). The warmest month is July, with an average high-temperature of 80.8°F (27.1°C) and an average low-temperature of 64.6°F (18.1°C). In July, the average heat index is evaluated at a tropical 86.7°F (30.4°C). Weather in July »

Weather in August

August, the last month of the summer in Fairfax, is another warm month, with temperature in the range of an average high of 79.5°F (26.4°C) and an average low of 62.1°F (16.7°C). In Fairfax, the average high-temperature in August is almost the same as in July - a still moderately hot 79.5°F (26.4°C). Weather in August »

Weather in September

September, the first month of the autumn in Fairfax, is still a warm month, with temperature in the range of an average low of 55.2°F (12.9°C) and an average high of 74.3°F (23.5°C). In Fairfax, Iowa, the average high-temperature in September is relatively the same as in August - a still moderately hot 74.3°F (23.5°C). Weather in September »

Weather in October

October, like September, is another mild autumn month in Fairfax, Iowa, with temperature in the range of an average high of 59.9°F (15.5°C) and an average low of 44.1°F (6.7°C). In October, the average high-temperature declines considerably from a moderately hot 74.3°F (23.5°C) in September to a mild 59.9°F (15.5°C). Weather in October »

Weather in November

The last month of the autumn, November, is another chilly month in Fairfax, Iowa, with an average temperature ranging between min 32.2°F (0.1°C) and max 45.5°F (7.5°C). In Fairfax, the average high-temperature in November declines considerably from a mild 59.9°F (15.5°C) in October to a frosty 45.5°F (7.5°C). Weather in November »

Weather in December

The first month of the winter, December, is also a wintry month in Fairfax, Iowa, with an average temperature varying between 33.1°F (0.6°C) and 22.5°F (-5.3°C). In Fairfax, Iowa, the average high-temperature in December decreases from a chilly 45.5°F (7.5°C) in November to a wintry 33.1°F (0.6°C). Weather in December »
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FAQ

What is the coldest month in Fairfax?

The coldest month in Fairfax is January, with an average high-temperature of 26.2°F (-3.2°C) and an average low-temperature of 14.2°F (-9.9°C).

What is the most humid month in Fairfax?

The most humid month is January, with an average relative humidity of 85%.

What is the driest month in Fairfax?

The months with the least rainfall in Fairfax, Iowa, are January and February Rain falls for 4.2 days and accumulates 0.63" (16mm) of rain.

How much does it rain in Fairfax?

In Fairfax, Iowa, during the entire year, the rain falls for 120.7 days and collects up to 18.31" (465mm) of precipitation.

When does it snow in Fairfax?

January through April, October through December are months with snowfall in Fairfax, Iowa.

When does it snow the most in Fairfax?

January is the month with the most snowfall in Fairfax. Snow falls for 10.3 days and accumulates 2.64" (67mm) of snow.

How many days does it snow in Fairfax?

Throughout the year, in Fairfax, Iowa, there are 36.1 snowfall days, and 8.43" (214mm) of snow is accumulated.

What is the month with the least sunshine in Fairfax?

January has the least sunshine of the year, with an average of 4.1h of sunshine.

What is the month with the lowest UV index in Fairfax?

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

When is Daylight Saving Time (DST) in Fairfax?

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 Fairfax?

May is the month with the most rainfall in Fairfax. Rain falls for 16 days and accumulates 3.07" (78mm) of precipitation.

When it does not snow in Fairfax?

May through September are months without snowfall in Fairfax.

When are the longest days in Fairfax?

The month with the longest days in Fairfax, Iowa, is June, with an average of 15h and 11min of daylight.

What are the months with the highest UV index in Fairfax?

June and July, with an average maximum UV index of 6, are months with the highest UV index.

What is the warmest month in Fairfax?

July is the warmest month, with an average high-temperature of 80.8°F (27.1°C) and an average low-temperature of 64.6°F (18.1°C).

What month has the most sunshine in Fairfax?

July has the most sunshine of the year, with an average of 10h of sunshine.

What is the least humid month in Fairfax?

The least humid month is October, with an average relative humidity of 73%.

What is the month with the shortest days in Fairfax?

The month with the shortest days is December, with an average of 9h and 11min of daylight.

Average temperature
Fairfax, IA

Average temperature - Fairfax, IA

The warmest month (with the highest average high temperature) is July (80.8°F).
The month with the lowest average high temperature is January (26.2°F).

The month with the highest average low temperature is July (64.6°F).
The coldest month (with the lowest average low temperature) is January (14.2°F).

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Average pressure
Fairfax, IA

Average pressure - Fairfax, IA

The month with the highest atmospheric pressure is January (30.14"Hg).
The month with the lowest atmospheric pressure is June (29.9"Hg).

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Average wind speed
Fairfax, IA

Average wind speed - Fairfax, IA

The windiest months (with the highest average wind speed) are January and April (10.7mph).
The calmest months (with the lowest average wind speed) are July and August (7mph).

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Average rainfall
Fairfax, IA

Average rainfall - Fairfax, IA

The wettest month (with the highest rainfall) is May (3.07").
The driest months (with the least rainfall) are January and February (0.63").

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Average rainfall days
Fairfax, IA

Average rainfall days - Fairfax, IA

The month with the highest number of rainy days is May (16 days).
The month with the least rainy days is February (3 days).

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Average snowfall
Fairfax, IA

Average snowfall - Fairfax, IA

The month with the highest snowfall is January (2.64").
The months with the least snowfall are May, June, July, August and September (0").

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Average snowfall days
Fairfax, IA

Average snowfall days - Fairfax, IA

The month with the highest number of snowfall days is January (10.3 days).
The months with the least snowfall days are May, June, July, August and September (0 days).

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Average daylight / Average sunshine
Fairfax, IA

Average daylight / Average sunshine - Fairfax, IA

The month with the longest days is June (Average daylight: 15h and 11min).
The month with the shortest days is December (Average daylight: 9h and 11min).

The month with the most sunshine is July (Average sunshine: 10h).
The month with the least sunshine is January (Average sunshine: 4.1h).

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Average sunshine days
Fairfax, IA

Average sunshine days - Fairfax, IA

The month with the most sunshine days is October (19.9 days).
The month with the least sunshine days is June (11.8 days).

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Average visibility
Fairfax, IA

Average visibility - Fairfax, IA

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

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