May weather forecast
Fairfield, ID

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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).

Temperature

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). In the month of May, the average low-temperature in Fairfield, Idaho, usually rests at a cold 39.7°F (4.3°C).

Humidity

The average relative humidity in May is 54%.

Rainfall

In May, the rain falls for 12 days. Throughout May, 0.98" (25mm) of precipitation is accumulated. In Fairfield, during the entire year, the rain falls for 74.4 days and collects up to 8.03" (204mm) of precipitation.

Snowfall

January through May, September through December are months with snowfall. May is the last month it regularly snows. During 0.4 snowfall days, in May, Fairfield aggregates 0.2" (5mm) of snow. In Fairfield, during the entire year, snow falls for 44.1 days and aggregates up to 29.65" (753mm) of snow.

Daylight

The average length of the day in May is 14h and 43min.
On the first day of May in Fairfield, Idaho, sunrise is at 6:30 am and sunset at 8:41 pm. On the last day of the month, sunrise is at 6:01 am and sunset at 9:12 pm MDT.

Sunshine

In May, the average sunshine in Fairfield is 11.1h.

UV index

The average daily maximum UV index in May is 4. A UV Index reading of 3 to 5 represents a medium health hazard from exposure to the Sun's UV radiation for average individuals.
Note: A maximum high UV index of 4 in May translates into the following recommendations:
Prioritize safety - Suggestions to prevent sun damage are offered. During midday, the Sun's radiation is strongest, and it's advisable to reduce direct exposure. Prioritize a wide-brim hat for comprehensive sun defense for your face, neck, eyes, and ears. Remember! The Sun's UV radiation can be magnified almost twofold by the reflection of snow.
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Frequently asked questions

What are the temperatures in Fairfield in May?

The high-temperature, in May, in Fairfield, records 60.4°F (15.8°C), while the low-temperature is 39.7°F (4.3°C).

What is the average humidity in May in Fairfield?

In Fairfield, the average relative humidity in May is 54%.

How many days does it rain in May in Fairfield?

In Fairfield, Idaho, during May, the rain falls for 12 days and regularly aggregates up to 0.98" (25mm) of precipitation.

What is the last month it snows in Fairfield?

May is the last month it regularly snows in Fairfield, Idaho. During 0.4 snowfall days, in May, Fairfield aggregates 0.2" (5mm) of snow.

What is the average length of the day in May in Fairfield?

In May, the average day length in Fairfield, Idaho, is 14h and 43min.

When is the sunrise / sunset in May in Fairfield?

On the first day of May, sunrise is at 6:30 am and sunset at 8:41 pm. On the last day of the month, sunrise is at 6:01 am and sunset at 9:12 pm MDT.

How many hours of sunshine does Fairfield have in May?

The average sunshine duration in May is 11.1h.

What is the UV index intensity in May in Fairfield?

In May, the average daily maximum UV index in Fairfield, Idaho, is 4. A UV Index estimate of 3 to 5 represents a medium hazard to health from unsafe exposure to Sun's UV rays.
Average humidity
Average rainfall days
Average snowfall
Average snowfall days
Average daylight
Average sunshine
Average sunshine days
Average UV index
Average cloud cover
Average visibility

Average temperature in May
Fairfield, ID

Average temperature in May - Fairfield, ID
  • Average high temperature in May: 60.4°F

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).

  • Average low temperature in May: 39.7°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 in May
Fairfield, ID

Average pressure in May - Fairfield, ID
  • Average pressure in May: 29.9"Hg

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 in May
Fairfield, ID

Average wind speed in May - Fairfield, ID
  • Average wind speed in May: 7.2mph

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 humidity in May
Fairfield, ID

Average humidity in May - Fairfield, ID
  • Average humidity in May: 54%

The month with the highest relative humidity is January (84%).
The month with the lowest relative humidity is August (32%).

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Average rainfall in May
Fairfield, ID

Average rainfall in May - Fairfield, ID
  • Average rainfall in May: 0.98"

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 in May
Fairfield, ID

Average rainfall days in May - Fairfield, ID
  • Average rainfall days in May: 12 days

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 in May
Fairfield, ID

Average snowfall in May - Fairfield, ID
  • Average snowfall in May: 0.2"

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 in May
Fairfield, ID

Average snowfall days in May - Fairfield, ID
  • Average snowfall days in May: 0.4 days

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 in May /
Average sunshine in May
Fairfield, ID

Average daylight in May / Average sunshine in May - Fairfield, ID
  • Average daylight in May: 14h and 4min

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).

  • Average sunshine in May: 11h and 1min

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 in May
Fairfield, ID

Average sunshine days in May - Fairfield, ID
  • Average sunshine days in May: 15.6 days

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 in May
Fairfield, ID

Average UV index in May - Fairfield, ID
  • Average UV index in May: 4

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 cloud cover in May
Fairfield, ID

Average cloud cover in May - Fairfield, ID
  • Average cloud cover in May: 23

The month with the most cloud cover is December (Cloud cover 38).
The month with the least cloud cover is July (Cloud cover 9).

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Average visibility in May
Fairfield, ID

Average visibility in May - Fairfield, ID
  • Average visibility in May: 6mi

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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