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 signals a shift in the average high-temperature, moving from April's moderate 56.7°F (13.7°C) to a still refreshing 67.1°F (19.5°C). Contrary to the day's heat, an average low-temperature of 45.1°F (7.3°C) is recorded during the nights in May.Humidity
The average relative humidity in May in Boise is 51%.Rainfall
In May, the rain falls for 11.1 days. Throughout May, 1.46" (37mm) of precipitation is accumulated. In Boise, Idaho, during the entire year, the rain falls for 116.8 days and collects up to 15.08" (383mm) of precipitation.Snowfall
In Boise, Idaho, snow does not fall in May through October.Daylight
In May, the average length of the day is 14h and 44min.On the first day of the month, sunrise is at 6:35 am and sunset at 8:47 pm. On the last day of May, sunrise is at 6:06 am and sunset at 9:19 pm MDT.
Sunshine
In Boise, the average sunshine in May is 10.9h.UV index
The average daily maximum UV index in May in Boise is 5. A UV Index value of 3 to 5 symbolizes a moderate threat to health from unsafe exposure to UV radiation for ordinary individuals.Note: In May, a regular UV index of 5 translates into these guidelines:
Adopt protective measures - It is advised to guard against sun damage. Being in direct Sun during midday can be harmful due to intense solar radiation; take precautions. Arm yourself against UV rays' harm with protective apparel and UV-filtering shades. Be advised! The UV radiation from the Sun can be almost doubled due to the reflective properties of snow.
Frequently asked questions
What is the temperature in May in Boise?
What is the average humidity in May in Boise?
How much does it rain in Boise in May?
When it does not snow in Boise?
Does it snow in Boise in May?
What is the average length of the day in May in Boise?
When are sunrise and sunset in May in Boise?
How long on average sun shines in May in Boise?
What is the UV index reading in May in Boise?
Average temperature in May
Boise, ID
- Average high temperature in May: 67.1°F
The warmest month (with the highest average high temperature) is July (87.8°F).
The month with the lowest average high temperature is December (34.7°F).
- Average low temperature in May: 45.1°F
The month with the highest average low temperature is August (61.3°F).
The coldest month (with the lowest average low temperature) is December (23.2°F).
Average pressure in May
Boise, ID
- Average pressure in May: 29.92"Hg
The month with the highest atmospheric pressure is January (30.25"Hg).
The month with the lowest atmospheric pressure is June (29.9"Hg).
Average wind speed in May
Boise, ID
- Average wind speed in May: 6.3mph
The windiest month (with the highest average wind speed) is April (7.1mph).
The calmest month (with the lowest average wind speed) is January (5.2mph).
Average humidity in May
Boise, ID
- Average humidity in May: 51%
The month with the highest relative humidity is January (80%).
The month with the lowest relative humidity is July (30%).
Average rainfall in May
Boise, ID
- Average rainfall in May: 1.46"
The wettest month (with the highest rainfall) is March (2.2").
The driest month (with the least rainfall) is July (0.2").
Average rainfall days in May
Boise, ID
- Average rainfall days in May: 11.1 days
The month with the highest number of rainy days is March (16.2 days).
The month with the least rainy days is July (4.5 days).
Average snowfall in May
Boise, ID
- Average snowfall in May: 0"
The month with the highest snowfall is December (6.65").
The months with the least snowfall are May, June, July, August, September and October (0").
Average snowfall days in May
Boise, ID
- Average snowfall days in May: 0.1 days
The month with the highest number of snowfall days is December (9.2 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight in May /
Average sunshine in May
Boise, ID
- Average daylight in May: 14h and 4min
The month with the longest days is June (Average daylight: 15h and 24min).
The month with the shortest days is December (Average daylight: 9h and 0min).
- Average sunshine in May: 10h and 5min
The month with the most sunshine is July (Average sunshine: 12h and 6min).
The month with the least sunshine is December (Average sunshine: 5h and 30min).
Average sunshine days in May
Boise, ID
- Average sunshine days in May: 16.3 days
The month with the most sunshine days is July (23.6 days).
The month with the least sunshine days is March (12.1 days).
Average UV index in May
Boise, ID
- Average UV index in May: 5
The month with the highest UV index is July (UV index 7).
The months with the lowest UV index are January, February, November and December (UV index 2).
Average cloud cover in May
Boise, ID
- Average cloud cover in May: 24
The month with the most cloud cover is December (Cloud cover 42).
The month with the least cloud cover is July (Cloud cover 8).
Average visibility in May
Boise, ID
- Average visibility in May: 6mi
The months with the highest visibility are February, March, April, May, June, July, August, September, October, November and December (6mi).
The month with the lowest visibility is January (5mi).
Boise, Idaho, USA
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