Contents
- Weather in May
- Frequently asked questions
- Average temperature in May
- Average pressure in May
- Average wind speed in May
- Average humidity in May
- Average rainfall in May
- Average rainfall days in May
- Average snowfall in May
- Average snowfall days in May
- Average daylight in May
- Average sunshine in May
- Average sunshine days in May
- Average UV index in May
- Average cloud cover in May
- Average visibility in May
Weather in May
Temperature
May's onset in Grangeville, Idaho, witnesses a shift in the average high-temperature, moving from a cool 52.3°F (11.3°C) in April to an enjoyable 62.6°F (17°C). May nights in Grangeville, Idaho, are characterized by a significant departure from the daytime highs, dropping to an average temperature of 38.8°F (3.8°C).Humidity
In May, the average relative humidity is 71%.Rainfall
In Grangeville, during May, the rain falls for 17.8 days and regularly aggregates up to 2.32" (59mm) of precipitation. 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 in Grangeville. May is the last month it regularly snows. During 1.3 snowfall days, in May, 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
The average length of the day in May is 14h and 58min.On the first day of May, sunrise is at 5:30 am and sunset at 7:52 pm. On the last day of the month, sunrise is at 4:57 am and sunset at 8:27 pm PDT.
Sunshine
In Grangeville, the average sunshine in May is 10.1h.UV index
The average daily maximum UV index in May is 4. A UV Index reading of 3 to 5 represents a moderate threat to health from exposure to the Sun's UV rays for average individuals.Note: In May, a regular UV index of 4 translates into these guidelines:
Ensure safety - Recommendations to avert sunburn are presented. Sun's radiation is most powerful around mid-day, so it's best to limit outdoor activities during this time. Arm yourself against UV rays' harm with protective apparel and UV-filtering shades. Note well! The intensity of the Sun's UV rays can be nearly doubled by snow reflection.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What is the usual temperature for Grangeville in May?
What is the average humidity in May?
How much does it rain in May?
What is the last month it snows?
How many hours of daylight does Grangeville have in May?
When are sunrise and sunset in May?
How long on average sun shines in May?
What is the UV index reading in May?
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).
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).
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).
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%).
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").
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).
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").
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).
Average daylight in May /
Average sunshine in May
Grangeville, ID
- Average daylight in May: 15h and 0min
The month with the longest days is June (Average daylight: 15h and 42min).
The month with the shortest days is December (Average daylight: 8h and 42min).
- Average sunshine in May: 10h and 1min
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).
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).
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).
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).
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).
Grangeville, Idaho, USA
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