May weather forecast
Grangeville, ID

Weather in May

May, the last month of the spring in Grangeville, is a comfortable month, with an average temperature fluctuating between 62.6°F (17°C) and 38.8°F (3.8°C).

Temperature

In May, the average high-temperature increases from a fresh 52.3°F (11.3°C) in April to a comfortable 62.6°F (17°C). In Grangeville, Idaho, the average low-temperature is 38.8°F (3.8°C).

Humidity

In Grangeville, the average relative humidity in May is 71%.

Rainfall

In May, in Grangeville, the rain falls for 17.8 days. Throughout May, 2.32" (59mm) of precipitation is accumulated. In Grangeville, during the entire year, the rain falls for 146.2 days and collects up to 23.35" (593mm) of precipitation.

Snowfall

January through May, September through December are months with snowfall. May is the last month it regularly snows. During 1.3 snowfall days, Grangeville aggregates 0.51" (13mm) of snow. In Grangeville, during the entire year, snow falls for 80.3 days and aggregates up to 60.47" (1536mm) of snow.

Daylight

In Grangeville, the average length of the day in May is 14h and 58min.
On the first day of the month, sunrise is at 5:30 am and sunset at 7:52 pm. On the last day of May, sunrise is at 4:57 am and sunset at 8:26 pm PDT.

Sunshine

The average sunshine in May in Grangeville is 10.1h.

UV index

The average daily maximum UV index in May is 4. A UV Index of 3 to 5 symbolizes a moderate threat to health from exposure to the Sun's UV rays for the average person.
Note: In May, the average maximum UV index of 4 translate into the following recommendations:
Take precautions - Protection against skin and eye damage is obliged. The Sun's most intense and consequently most harmful UV radiation during midday hours should be decreased by minimizing exposure and seeking shade. Sun-protective clothing, a long-sleeved shirt and pants, a wide-brimmed hat, and UVA and UVB-blocking sunglasses are particularly helpful in blocking UV radiation's harmful effects. Caution! The reflection of snow can nearly double the intensity of the Sun's UV radiation.
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FAQ

What is the temperature in May in Grangeville?

In Grangeville, in May, the average high-temperature is 62.6°F (17°C), and the average low-temperature is 38.8°F (3.8°C).

What is the average humidity in May in Grangeville?

The average relative humidity in May in Grangeville, Idaho, is 71%.

How many days does it rain in May in Grangeville?

In Grangeville, in May, during 17.8 rainfall days, 2.32" (59mm) of precipitation is typically accumulated.

What is the last month it snows in Grangeville?

May is the last month it regularly snows. During 1.3 snowfall days, in May, Grangeville aggregates 0.51" (13mm) of snow.

How many hours of daylight does Grangeville have in May?

In Grangeville, the average day length in May is 14h and 58min.

When are sunrise and sunset in May in Grangeville?

In May, on the first day of the month, sunrise is at 5:30 am and sunset at 7:52 pm. On the last day of the month, in Grangeville, Idaho, sunrise is at 4:57 am and sunset at 8:26 pm PDT.

How long on average sun shines in May in Grangeville?

In Grangeville, Idaho, the average sunshine duration in May is 10.1h.

How high is the UV index in May in Grangeville?

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

Average temperature in May
Grangeville, ID

Average temperature in May - Grangeville, ID
  • Average high temperature in May: 62.6°F

The warmest month (with the highest average high temperature) is August (82.6°F).
The month with the lowest average high temperature is December (33.6°F).

  • Average low temperature in May: 38.8°F

The month with the highest average low temperature is August (53.2°F).
The coldest month (with the lowest average low temperature) is December (21.7°F).

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Average pressure in May
Grangeville, ID

Average pressure in May - Grangeville, ID
  • Average pressure in May: 29.96"Hg

The month with the highest atmospheric pressure is January (30.21"Hg).
The months with the lowest atmospheric pressure are June and August (29.94"Hg).

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Average wind speed in May
Grangeville, ID

Average wind speed in May - Grangeville, ID
  • Average wind speed in May: 4mph

The windiest months (with the highest average wind speed) are January and November (4.9mph).
The calmest month (with the lowest average wind speed) is August (3.8mph).

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Average humidity in May
Grangeville, ID

Average humidity in May - Grangeville, ID
  • Average humidity in May: 71%

The month with the highest relative humidity is January (88%).
The month with the lowest relative humidity is August (47%).

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Average rainfall in May
Grangeville, ID

Average rainfall in May - Grangeville, ID
  • Average rainfall in May: 2.32"

The wettest month (with the highest rainfall) is April (2.91").
The driest month (with the least rainfall) is July (0.59").

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Average rainfall days in May
Grangeville, ID

Average rainfall days in May - Grangeville, ID
  • Average rainfall days in May: 17.8 days

The month with the highest number of rainy days is April (19.3 days).
The month with the least rainy days is August (6.8 days).

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Average snowfall in May
Grangeville, ID

Average snowfall in May - Grangeville, ID
  • Average snowfall in May: 0.51"

The month with the highest snowfall is February (12.95").
The months with the least snowfall are June, July and August (0").

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Average snowfall days in May
Grangeville, ID

Average snowfall days in May - Grangeville, ID
  • Average snowfall days in May: 1.3 days

The month with the highest number of snowfall days is December (16.9 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
Grangeville, ID

Average daylight in May / Average sunshine in May - Grangeville, ID
  • Average daylight in May: 14h and 58min

The month with the longest days is June (Average daylight: 15h and 41min).
The month with the shortest days is December (Average daylight: 8h and 43min).

  • Average sunshine in May: 10h and 6min

The month with the most sunshine is August (Average sunshine: 11h and 54min).
The month with the least sunshine is January (Average sunshine: 4h and 48min).

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Average sunshine days in May
Grangeville, ID

Average sunshine days in May - Grangeville, ID
  • Average sunshine days in May: 10.6 days

The month with the most sunshine days is August (22.2 days).
The month with the least sunshine days is March (7.5 days).

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Average UV index in May
Grangeville, ID

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

The month with the highest UV index is July (UV index 6).
The month with the lowest UV index is February (UV index 1).

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Average cloud cover in May
Grangeville, ID

Average cloud cover in May - Grangeville, ID
  • Average cloud cover in May: 34

The month with the most cloud cover is February (Cloud cover 53).
The month with the least cloud cover is August (Cloud cover 13).

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Average visibility in May
Grangeville, ID

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

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

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