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
As Porthill, Idaho, enters May, the average high-temperature increases from the a frosty 46°F (7.8°C) of April to a refreshing 59.7°F (15.4°C). Porthill measures a considerable dip from daytime highs with an average low-temperature of 36.7°F (2.6°C) during May.Humidity
The average relative humidity in May is 69%.Rainfall
In May, in Porthill, the rain falls for 16.3 days. Throughout May, 1.89" (48mm) of precipitation is accumulated. In Porthill, during the entire year, the rain falls for 157.1 days and collects up to 21.61" (549mm) of precipitation.Snowfall
In Porthill, snow does not fall in May through August.Daylight
In Porthill, the average length of the day in May is 15h and 19min.On the first day of May, sunrise is at 6:23 am and sunset at 9:02 pm. On the last day of the month, sunrise is at 5:46 am and sunset at 9:41 pm MDT.
Sunshine
In May, the average sunshine is 10.1h.UV index
The average daily maximum UV index in May is 3. A UV Index estimate of 3 to 5 represents a moderate health risk from unsafe exposure to UV radiation for the ordinary person.Note: The UV index of 3 in May translates into these instructions:
Put precautions into practice - Guidance to elude sunburn is provided. The Sun is most powerful around mid-day, so it's a good practice to reduce direct exposure. A wide-brimmed hat is a shield, deflecting up to 50% of harmful UV radiation from eyes.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What is the average May temperature in Porthill?
What is the average humidity in May in Porthill?
How much does it rain in Porthill in May?
When it does not snow in Porthill?
Does it snow in Porthill in May?
How many hours of daylight does Porthill have in May?
What time are sunrise and sunset in May in Porthill?
How many hours of sunshine does Porthill have in May?
How high is the UV index in May in Porthill?
Average temperature in May
Porthill, ID
- Average high temperature in May: 59.7°F
The warmest month (with the highest average high temperature) is August (76.3°F).
The month with the lowest average high temperature is December (27.3°F).
- Average low temperature in May: 36.7°F
The month with the highest average low temperature is August (47.7°F).
The coldest months (with the lowest average low temperature) are January and December (16.3°F).
Average pressure in May
Porthill, ID
- Average pressure in May: 29.95"Hg
The month with the highest atmospheric pressure is January (30.19"Hg).
The month with the lowest atmospheric pressure is June (29.91"Hg).
Average wind speed in May
Porthill, ID
- Average wind speed in May: 4.2mph
The windiest month (with the highest average wind speed) is June (4.3mph).
The calmest month (with the lowest average wind speed) is December (3.5mph).
Average humidity in May
Porthill, ID
- Average humidity in May: 69%
The month with the highest relative humidity is January (94%).
The month with the lowest relative humidity is August (55%).
Average rainfall in May
Porthill, ID
- Average rainfall in May: 1.89"
The wettest month (with the highest rainfall) is December (2.76").
The driest month (with the least rainfall) is August (0.43").
Average rainfall days in May
Porthill, ID
- Average rainfall days in May: 16.3 days
The month with the highest number of rainy days is April (19.7 days).
The month with the least rainy days is August (6.5 days).
Average snowfall in May
Porthill, ID
- Average snowfall in May: 0"
The month with the highest snowfall is January (11.02").
The months with the least snowfall are May, June, July and August (0").
Average snowfall days in May
Porthill, ID
- Average snowfall days in May: 0 days
The month with the highest number of snowfall days is December (17.4 days).
The months with the least snowfall days are May, June, July and August (0 days).
Average daylight in May /
Average sunshine in May
Porthill, ID
- Average daylight in May: 15h and 2min
The month with the longest days is June (Average daylight: 16h and 6min).
The month with the shortest days is December (Average daylight: 8h and 18min).
- 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: 3h and 48min).
Average sunshine days in May
Porthill, ID
- Average sunshine days in May: 12.6 days
The month with the most sunshine days is August (21.8 days).
The month with the least sunshine days is March (7.7 days).
Average UV index in May
Porthill, ID
- Average UV index in May: 3
The month with the highest UV index is July (UV index 5).
The months with the lowest UV index are January, February, November and December (UV index 1).
Average cloud cover in May
Porthill, ID
- Average cloud cover in May: 35
The month with the most cloud cover is January (Cloud cover 62).
The month with the least cloud cover is August (Cloud cover 15).
Average visibility in May
Porthill, ID
- Average visibility in May: 6mi
The months with the highest visibility are May, June, July, August and September (6mi).
The month with the lowest visibility is January (2mi).
Porthill, Idaho, USA
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