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
Observing a minor shift, the average high-temperature during May adjusts from April's mild 55.9°F (13.3°C) to a comfortable 64.8°F (18.2°C). Rainier in May observes a substantial swing from the daily highs, with average nighttime temperatures of 40.8°F (4.9°C).Humidity
In Rainier, the average relative humidity in May is 78%.Rainfall
In Rainier, during May, the rain falls for 13.9 days and regularly aggregates up to 1.61" (41mm) of precipitation. Throughout the year, there are 175.5 rainfall days, and 25.83" (656mm) of precipitation is accumulated.Snowfall
April through October are months without snowfall.Daylight
In Rainier, Oregon, the average length of the day in May is 14h and 59min.On the first day of May in Rainier, Oregon, sunrise is at 5:56 am and sunset at 8:20 pm. On the last day of the month, sunrise is at 5:24 am and sunset at 8:55 pm PDT.
Sunshine
In May, the average sunshine in Rainier is 7.9h.UV index
The average daily maximum UV index in May is 4. A UV Index estimate of 3 to 5 represents a moderate threat to health from exposure to the Sun's UV rays for the ordinary person.Note: The maximum UV index of 4 during May translates into these guidelines:
Be mindful. Individuals with a lighter skin tone may suffer burns in less than 30 minutes. Protect yourself from the midday Sun's peak UV radiation by minimizing exposure. It's wise to wear UVA and UVB-blocking sunglasses when the sun shines brightly.
Frequently asked questions
What are the temperatures in Rainier in May?
What is the average humidity in May in Rainier?
How many days does it rain in May in Rainier?
When it does not snow in Rainier?
What is the average length of the day in May in Rainier?
What time are sunrise and sunset in May in Rainier?
How many hours of sunshine does Rainier have in May?
What is the UV index intensity in May in Rainier?
Average temperature in May
Rainier, OR
- Average high temperature in May: 64.8°F
The warmest month (with the highest average high temperature) is August (77.9°F).
The month with the lowest average high temperature is December (42.3°F).
- Average low temperature in May: 40.8°F
The month with the highest average low temperature is August (49.8°F).
The coldest month (with the lowest average low temperature) is December (32.7°F).
Average pressure in May
Rainier, OR
- Average pressure in May: 30.04"Hg
The month with the highest atmospheric pressure is January (30.1"Hg).
The months with the lowest atmospheric pressure are August and September (30.01"Hg).
Average wind speed in May
Rainier, OR
- Average wind speed in May: 4.2mph
The windiest month (with the highest average wind speed) is January (4.8mph).
The calmest month (with the lowest average wind speed) is September (3.9mph).
Average humidity in May
Rainier, OR
- Average humidity in May: 78%
The months with the highest relative humidity are January, February, November and December (88%).
The month with the lowest relative humidity is July (72%).
Average rainfall in May
Rainier, OR
- Average rainfall in May: 1.61"
The wettest month (with the highest rainfall) is January (3.9").
The driest month (with the least rainfall) is August (0.39").
Average rainfall days in May
Rainier, OR
- Average rainfall days in May: 13.9 days
The month with the highest number of rainy days is March (20.3 days).
The month with the least rainy days is July (6.1 days).
Average snowfall in May
Rainier, OR
- Average snowfall in May: 0"
The month with the highest snowfall is January (1.26").
The months with the least snowfall are April, May, June, July, August, September and October (0").
Average snowfall days in May
Rainier, OR
- Average snowfall days in May: 0 days
The month with the highest number of snowfall days is February (2.2 days).
The months with the least snowfall days are April, May, June, July, August, September and October (0 days).
Average daylight in May /
Average sunshine in May
Rainier, OR
- 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: 7h and 5min
The month with the most sunshine is August (Average sunshine: 10h and 24min).
The months with the least sunshine are January, February and December (Average sunshine: 3h and 30min).
Average sunshine days in May
Rainier, OR
- Average sunshine days in May: 15.3 days
The month with the most sunshine days is July (22 days).
The month with the least sunshine days is March (8.9 days).
Average UV index in May
Rainier, OR
- Average UV index in May: 4
The months with the highest UV index are June and July (UV index 5).
The month with the lowest UV index is November (UV index 1).
Average cloud cover in May
Rainier, OR
- Average cloud cover in May: 55
The months with the most cloud cover are February and March (Cloud cover 65).
The month with the least cloud cover is August (Cloud cover 36).
Average visibility in May
Rainier, OR
- Average visibility in May: 4mi
The month with the highest visibility is August (5mi).
The months with the lowest visibility are January, February, March, April, May, June, July, September, October, November and December (4mi).
Rainier, Oregon, USA
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