Climate and monthly weather forecast
Fairfield, ID

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Weather in January

January, like December, is another subzero cold winter month in Fairfield, Idaho, with an average temperature fluctuating between 14.4°F (-9.8°C) and 28.9°F (-1.7°C). The transition into January notes an average high-temperature of a still freezing cold 28.9°F (-1.7°C), revealing a mild distinction from the 27.9°F (-2.3°C) in December. Weather in January »

Weather in February

February, the last month of the winter in Fairfield, is another freezing cold month, with an average temperature varying between 16.7°F (-8.5°C) and 31.3°F (-0.4°C). Transitioning into February, Fairfield records an average high-temperature of a still subzero cold 31.3°F (-0.4°C), almost identical to January's 28.9°F (-1.7°C). Weather in February »

Weather in March

The first month of the spring, March, is an icy month in Fairfield, Idaho, with an average temperature varying between 25.3°F (-3.7°C) and 39.7°F (4.3°C). Fairfield observes a slight uplift in the average high-temperature with the onset of March, adjusting from February's freezing cold 31.3°F (-0.4°C) to a wintry 39.7°F (4.3°C). Weather in March »

Weather in April

April is a fresh spring month in Fairfield, Idaho, with an average temperature varying between 50°F (10°C) and 32.4°F (0.2°C). April's arrival coincides with a temperature rise, moving from March's cold 39.7°F (4.3°C) to a fresh 50°F (10°C). Weather in April »

Weather in May

May, the last month of the spring in Fairfield, is a mild month, with temperature in the range of an average low of 39.7°F (4.3°C) and an average high of 60.4°F (15.8°C). A rise in the average high-temperature is observed during May, moving from a cool 50°F (10°C) in April to a mild 60.4°F (15.8°C). Weather in May »

Weather in June

The first month of the summer, June, is an agreeable month in Fairfield, Idaho, with an average temperature ranging between max 70.9°F (21.6°C) and min 46.9°F (8.3°C). June sees a temperature increase, moving from a refreshing 60.4°F (15.8°C) in May to a pleasant 70.9°F (21.6°C). Weather in June »

Weather in July

July is a moderately hot summer month in Fairfield, Idaho, with an average temperature varying between 55.6°F (13.1°C) and 82.9°F (28.3°C). Fairfield experiences its highest temperatures in July, with an average peak of 82.9°F (28.3°C) and a low of 55.6°F (13.1°C). Weather in July »

Weather in August

August, the last month of the summer in Fairfield, is another warm month, with an average temperature varying between 55.6°F (13.1°C) and 81.7°F (27.6°C). With August's arrival, Fairfield's weather records an average high-temperature of a still moderately hot 81.7°F (27.6°C), marking little difference from July's 82.9°F (28.3°C). Weather in August »

Weather in September

September, the first month of the autumn in Fairfield, is still a pleasant month, with an average temperature fluctuating between 70.9°F (21.6°C) and 49.1°F (9.5°C). As September begins, there is a decrease in the average high-temperature, falling from a warm 81.7°F (27.6°C) in August to an agreeable 70.9°F (21.6°C). Weather in September »

Weather in October

October, like September, in Fairfield, Idaho, is a cool autumn month, with an average temperature ranging between max 54°F (12.2°C) and min 36.9°F (2.7°C). As Fairfield steps into October, a marked temperature drop is observed, with the average high-temperature reducing from September's agreeable 70.9°F (21.6°C) to a cool 54°F (12.2°C). Weather in October »

Weather in November

The last month of the autumn, November, is also an icy month in Fairfield, Idaho, with an average temperature ranging between max 40.1°F (4.5°C) and min 24.8°F (-4°C). Fairfield's November weather features a mild decline in high-temperatures, reducing from a fresh 54°F (12.2°C) in October to an icy 40.1°F (4.5°C). Weather in November »

Weather in December

December, the first month of the winter in Fairfield, is still a freezing cold month, with an average temperature varying between 27.9°F (-2.3°C) and 14.5°F (-9.7°C). With an average high-temperature of 27.9°F (-2.3°C) and an average low-temperature of 14.5°F (-9.7°C), December is the coldest month. Weather in December »
Updated: Feb 12, 2024 | Published by: Weather U.S. | Resources

Frequently asked questions

What is the most humid month in Fairfield?

January is the most humid month, with an average relative humidity of 84%.

How many days does it rain in Fairfield?

Throughout the year, there are 74.4 rainfall days, and 8.03" (204mm) of precipitation is accumulated.

When does it snow in Fairfield?

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

How many days does it snow in Fairfield?

Throughout the year, in Fairfield, there are 44.1 snowfall days, and 29.65" (753mm) of snow is accumulated.

What is the month with the least sunshine in Fairfield?

January and December, with an average of 5.9h of sunshine, are months with the least sunshine in Fairfield, Idaho.

What are the months with the lowest UV index in Fairfield?

The months with the lowest UV index are January through March, October through December, with an average maximum UV index of 2.

What is the wettest month in Fairfield?

The month with the most rainfall is February, when the rain falls for 4.9 days and typically aggregates up to 1.02" (26mm) of precipitation.

What is the snowiest month in Fairfield?

February is the month with the most snowfall. Snow falls for 9.9 days and accumulates 7.87" (200mm) of snow.

When is Daylight Saving Time (DST) in Fairfield?

On Sunday, March 10. 2024, at 2:00 am, Daylight Saving Time starts, and the time zone changes from MST to MDT. Daylight Saving Time ends Sunday, November 3. 2024, at 2:00 am, and the time zone reverts from MDT to MST.

When it does not snow in Fairfield?

June through August are months without snowfall.

When are the longest days in Fairfield?

The month with the longest days is June, with an average of 15h and 18min of daylight.

What is the hottest time of year in Fairfield?

In Fairfield, July is the month with the highest recorded average temperatures, measuring a high of 82.9°F (28.3°C) and a low of 55.6°F (13.1°C).

What is the driest month in Fairfield?

The month with the least rainfall in Fairfield is July, when the rain falls for 5.3 days and typically collects 0.28" (7mm) of precipitation.

What month has the most sunshine in Fairfield?

The month with the most sunshine in Fairfield is July, with an average of 12h of sunshine.

What is the month with the highest UV index in Fairfield?

With an average maximum UV index of 6, July is the month with the highest UV index in Fairfield, Idaho.

What is the least humid month in Fairfield?

August is the least humid month in Fairfield, Idaho, with an average relative humidity of 32%.

What part of the year is the coldest in Fairfield?

During the coldest month in Fairfield, December, temperatures average a high of 27.9°F (-2.3°C) and a low of 14.5°F (-9.7°C).

What is the month with the shortest days in Fairfield?

December has the shortest days of the year in Fairfield, with an average of 9h and 0min of daylight.

Average temperature
Fairfield, ID

Average temperature - Fairfield, ID

The warmest month (with the highest average high temperature) is July (82.9°F).
The month with the lowest average high temperature is December (27.9°F).

The months with the highest average low temperature are July and August (55.6°F).
The coldest month (with the lowest average low temperature) is January (14.4°F).

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Average pressure
Fairfield, ID

Average pressure - Fairfield, ID

The month with the highest atmospheric pressure is January (30.28"Hg).
The month with the lowest atmospheric pressure is June (29.88"Hg).

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Average wind speed
Fairfield, ID

Average wind speed - Fairfield, ID

The windiest months (with the highest average wind speed) are April and June (7.6mph).
The calmest month (with the lowest average wind speed) is December (5.3mph).

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Average rainfall
Fairfield, ID

Average rainfall - Fairfield, ID

The wettest month (with the highest rainfall) is February (1.02").
The driest month (with the least rainfall) is July (0.28").

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Average rainfall days
Fairfield, ID

Average rainfall days - Fairfield, ID

The month with the highest number of rainy days is May (12 days).
The month with the least rainy days is January (2.8 days).

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Average snowfall
Fairfield, ID

Average snowfall - Fairfield, ID

The month with the highest snowfall is February (7.87").
The months with the least snowfall are June, July and August (0").

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Average snowfall days
Fairfield, ID

Average snowfall days - Fairfield, ID

The month with the highest number of snowfall days is December (10.5 days).
The months with the least snowfall days are June, July and August (0 days).

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Average daylight / Average sunshine
Fairfield, ID

Average daylight / Average sunshine - Fairfield, ID

The month with the longest days is June (Average daylight: 15h and 18min).
The month with the shortest days is December (Average daylight: 9h and 0min).

The month with the most sunshine is July (Average sunshine: 12h and 0min).
The months with the least sunshine are January and December (Average sunshine: 5h and 54min).

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Average sunshine days
Fairfield, ID

Average sunshine days - Fairfield, ID

The month with the most sunshine days is October (23.5 days).
The month with the least sunshine days is May (15.6 days).

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Average UV index
Fairfield, ID

Average UV index - Fairfield, ID

The month with the highest UV index is July (UV index 6).
The months with the lowest UV index are January, February, March, October, November and December (UV index 2).

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Average visibility
Fairfield, ID

Average visibility - Fairfield, ID

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

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Fairfield, Idaho, USA

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