May weather forecast
May, ID

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Weather in May

May, the last month of the spring in May, is a fresh month, with an average temperature ranging between min 33.4°F (0.8°C) and max 54.5°F (12.5°C).

Temperature

May brings a temperature change, with average high-temperatures moving from April's icy 42.4°F (5.8°C) to a cool 54.5°F (12.5°C). The average low-temperature, in May, is an icy 33.4°F (0.8°C).

Humidity

In May, the average relative humidity is 61%.

Rainfall

In May, in May, the rain falls for 9.7 days. Throughout May, 0.55" (14mm) of precipitation is accumulated. Throughout the year, there are 75.7 rainfall days, and 6.38" (162mm) of precipitation is accumulated.

Snowfall

Months with snowfall in May are January through June, September through December. In May, Idaho, in May, during 1.2 snowfall days, 0.31" (8mm) of snow is typically accumulated. Throughout the year, there are 51.7 snowfall days, and 18.62" (473mm) of snow is accumulated.

Daylight

In May, the average length of the day is 14h and 50min.
On the first day of May in May, sunrise is at 6:24 am and sunset at 8:40 pm. On the last day of the month, sunrise is at 5:53 am and sunset at 9:13 pm MDT.

Sunshine

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

UV index

The average daily maximum UV index in May is 4. A UV Index of 3 to 5 symbolizes a moderate health risk from exposure to the Sun's UV radiation for ordinary individuals.
Note: The maximum UV index of 4 during May leads to these instructions:
Take care. Persons with lighter skin might suffer burns in less than 30 minutes. Midday is when the Sun's radiation is strongest; avoid prolonged exposure during this time. To cut down UV radiation exposure by about half, sport a wide-brim hat. Be alert to the fact! The reflection from snow can nearly double the UV radiation of the Sun.
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Frequently asked questions

What is the average May temperature in May?

May temperatures vary between a high-temperature of 54.5°F (12.5°C) and a low-temperature of 33.4°F (0.8°C).

What is the average humidity in May in May?

The average relative humidity in May in May, Idaho, is 61%.

How much does it rain in May in May?

In May, during May, the rain falls for 9.7 days and regularly aggregates up to 0.55" (14mm) of precipitation.

How much does it snow in May in May?

In May, in May, during 1.2 snowfall days, 0.31" (8mm) of snow is typically accumulated.

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

In May, Idaho, the average day length in May is 14h and 50min.

When is the sunrise / sunset in May in May?

On the first day of May in May, sunrise is at 6:24 am and sunset at 8:40 pm. On the last day of the month, sunrise is at 5:53 am and sunset at 9:13 pm MDT.

How long on average sun shines in May in May?

The average sunshine duration in May in May, Idaho, is 11.1h.

How high is the UV index in May in May?

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

Average temperature in May
May, ID

Average temperature in May - May, ID
  • Average high temperature in May: 54.5°F

The warmest month (with the highest average high temperature) is July (76.6°F).
The month with the lowest average high temperature is December (26.1°F).

  • Average low temperature in May: 33.4°F

The month with the highest average low temperature is August (47.8°F).
The coldest month (with the lowest average low temperature) is January (8.1°F).

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Average pressure in May
May, ID

Average pressure in May - May, ID
  • Average pressure in May: 29.93"Hg

The month with the highest atmospheric pressure is January (30.27"Hg).
The month with the lowest atmospheric pressure is June (29.91"Hg).

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Average wind speed in May
May, ID

Average wind speed in May - May, ID
  • Average wind speed in May: 5.3mph

The windiest months (with the highest average wind speed) are June and July (5.7mph).
The calmest month (with the lowest average wind speed) is January (4.8mph).

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Average humidity in May
May, ID

Average humidity in May - May, ID
  • Average humidity in May: 61%

The month with the highest relative humidity is February (87%).
The months with the lowest relative humidity are July and August (38%).

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Average rainfall in May
May, ID

Average rainfall in May - May, ID
  • Average rainfall in May: 0.55"

The wettest month (with the highest rainfall) is June (1.1").
The driest month (with the least rainfall) is July (0.28").

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Average rainfall days in May
May, ID

Average rainfall days in May - May, ID
  • Average rainfall days in May: 9.7 days

The month with the highest number of rainy days is June (10.2 days).
The month with the least rainy days is January (3.8 days).

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Average snowfall in May
May, ID

Average snowfall in May - May, ID
  • Average snowfall in May: 0.31"

The month with the highest snowfall is February (3.54").
The months with the least snowfall are July and August (0").

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Average snowfall days in May
May, ID

Average snowfall days in May - May, ID
  • Average snowfall days in May: 1.2 days

The month with the highest number of snowfall days is December (10.1 days).
The months with the least snowfall days are July and August (0 days).

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Average daylight in May /
Average sunshine in May
May, ID

Average daylight in May / Average sunshine in May - May, ID
  • Average daylight in May: 14h and 5min

The month with the longest days is June (Average daylight: 15h and 30min).
The month with the shortest days is December (Average daylight: 8h and 54min).

  • Average sunshine in May: 11h and 1min

The month with the most sunshine is July (Average sunshine: 11h and 54min).
The month with the least sunshine is January (Average sunshine: 5h and 48min).

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Average sunshine days in May
May, ID

Average sunshine days in May - May, ID
  • Average sunshine days in May: 18.7 days

The month with the most sunshine days is July (24.1 days).
The months with the least sunshine days are March and April (17.2 days).

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Average UV index in May
May, ID

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

The months with the highest UV index are June and July (UV index 5).
The months with the lowest UV index are January, February, March, April, October, November and December (UV index 2).

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Average cloud cover in May
May, ID

Average cloud cover in May - May, ID
  • Average cloud cover in May: 26

The month with the most cloud cover is February (Cloud cover 44).
The month with the least cloud cover is July (Cloud cover 11).

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Average visibility in May
May, ID

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

The months with the highest visibility are April, May, June, July, August, September, October and November (6mi).
The months with the lowest visibility are January and February (4mi).

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May, Idaho, USA

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