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 May arrives, a slight rise in the average high-temperature is observed, moving from 55.9°F (13.3°C) in April to a still refreshing 64°F (17.8°C). Grand Ronde witnesses a consistent, sharp contrast from the daytime highs, with an average low-temperature of 42.1°F (5.6°C) throughout May.Humidity
In May, the average relative humidity in Grand Ronde, Oregon, is 78%.Rainfall
In May, the rain falls for 12.1 days. Throughout May, 1.06" (27mm) of precipitation is accumulated. In Grand Ronde, during the entire year, the rain falls for 156 days and collects up to 15.94" (405mm) of precipitation.Snowfall
April through October are months without snowfall.Daylight
In Grand Ronde, the average length of the day in May is 14h and 53min.On the first day of May in Grand Ronde, sunrise is at 6:02 am and sunset at 8:20 pm. On the last day of the month, sunrise is at 5:30 am and sunset at 8:53 pm PDT.
Sunshine
The average sunshine in May is 7.7h.UV index
In Grand Ronde, the average daily maximum UV index in May is 4. A UV Index of 3 to 5 symbolizes a medium vulnerability from exposure to the Sun's UV rays for average individuals.Note: A maximum high UV index of 4 in May translates into the following recommendations:
Undertake protective steps - Recommendations to avoid sunburn are issued. When the Sun's UV radiation is most intense during midday, it's best to find shade and limit exposure. In the presence of strong sunlight, it's crucial to wear sunglasses that ward off UVA and UVB rays.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What is the average May temperature?
What is the average humidity in May?
How many days does it rain in May in Grand Ronde?
When it does not snow?
What is the average length of the day in May?
What time are sunrise and sunset in May?
How many hours of sunshine does Grand Ronde have in May?
What is the UV index reading in May?
Average temperature in May
Grand Ronde, OR
- Average high temperature in May: 64°F
The warmest month (with the highest average high temperature) is August (78.4°F).
The month with the lowest average high temperature is December (43.5°F).
- Average low temperature in May: 42.1°F
The month with the highest average low temperature is August (52.3°F).
The coldest month (with the lowest average low temperature) is December (33.3°F).
Average pressure in May
Grand Ronde, OR
- Average pressure in May: 30.05"Hg
The month with the highest atmospheric pressure is January (30.1"Hg).
The month with the lowest atmospheric pressure is September (30.01"Hg).
Average wind speed in May
Grand Ronde, OR
- Average wind speed in May: 4.3mph
The windiest month (with the highest average wind speed) is March (5mph).
The calmest month (with the lowest average wind speed) is August (3.8mph).
Average humidity in May
Grand Ronde, OR
- Average humidity in May: 78%
The months with the highest relative humidity are February and December (89%).
The month with the lowest relative humidity is August (71%).
Average rainfall in May
Grand Ronde, OR
- Average rainfall in May: 1.06"
The wettest month (with the highest rainfall) is December (2.56").
The driest month (with the least rainfall) is July (0.24").
Average rainfall days in May
Grand Ronde, OR
- Average rainfall days in May: 12.1 days
The month with the highest number of rainy days is March (18.9 days).
The month with the least rainy days is August (4.8 days).
Average snowfall in May
Grand Ronde, OR
- Average snowfall in May: 0"
The month with the highest snowfall is February (0.94").
The months with the least snowfall are April, May, June, July, August, September and October (0").
Average snowfall days in May
Grand Ronde, OR
- Average snowfall days in May: 0 days
The month with the highest number of snowfall days is February (2.3 days).
The months with the least snowfall days are May, June, July, August, September and October (0 days).
Average daylight in May /
Average sunshine in May
Grand Ronde, OR
- Average daylight in May: 14h and 5min
The month with the longest days is June (Average daylight: 15h and 36min).
The month with the shortest days is December (Average daylight: 8h and 48min).
- Average sunshine in May: 7h and 4min
The month with the most sunshine is August (Average sunshine: 10h and 30min).
The month with the least sunshine is February (Average sunshine: 3h and 24min).
Average sunshine days in May
Grand Ronde, OR
- Average sunshine days in May: 16.2 days
The month with the most sunshine days is July (23.7 days).
The month with the least sunshine days is February (9.3 days).
Average UV index in May
Grand Ronde, OR
- Average UV index in May: 4
The months with the highest UV index are June and July (UV index 5).
The months with the lowest UV index are January, February, November and December (UV index 2).
Average cloud cover in May
Grand Ronde, OR
- Average cloud cover in May: 53
The month with the most cloud cover is February (Cloud cover 67).
The month with the least cloud cover is August (Cloud cover 29).
Average visibility in May
Grand Ronde, OR
- Average visibility in May: 4mi
The months with the highest visibility are June, July, August and September (5mi).
The months with the lowest visibility are January, February, March, April, May, October, November and December (4mi).
Grand Ronde, Oregon, USA
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