May weather forecastSiletz, OR
May
Weather in May
May, the last month of the spring in Siletz, is a refreshing month, with an average temperature varying between 57.9°F (14.4°C) and 46.8°F (8.2°C).Temperature
Siletz observes a minor difference in average high-temperatures between April's 53.2°F (11.8°C) and May's 57.9°F (14.4°C). During May, the average low-temperature is a chilly 46.8°F (8.2°C).Humidity
April, May, July, September and October, with an average relative humidity of 81%, are the least humid months.Rainfall
In Siletz, in May, during 9.5 rainfall days, 1.02" (26mm) of precipitation is typically accumulated. In Siletz, during the entire year, the rain falls for 139.5 days and collects up to 18.66" (474mm) of precipitation.Snowfall
March through October and December are months without snowfall.Daylight
The average length of the day in May is 14h and 51min.On the first day of May, sunrise is at 6:04 am and sunset at 8:21 pm. On the last day of the month, sunrise is at 5:33 am and sunset at 8:53 pm PDT.
Sunshine
The average sunshine in May is 8.4h.UV index
The average daily maximum UV index in May is 4. A UV Index estimate of 3 to 5 represents a medium vulnerability from exposure to the Sun's UV radiation for the average person.Note: In May, an average UV index of 4 transforms into the following instructions:
Take precautions - Protection against skin and eye damage is obliged. The solar radiation around mid-day is intense; avoid the Sun and stay safe. Wearing a wide-brim hat can block approximately 50% of UV radiation, protecting the eyes.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in May
Siletz, OR
- Average high temperature in May: 57.9°F
The warmest month (with the highest average high temperature) is August (67.6°F).
The month with the lowest average high temperature is December (47.7°F).
- Average low temperature in May: 46.8°F
The month with the highest average low temperature is August (53.6°F).
The coldest month (with the lowest average low temperature) is December (40.6°F).
Average pressure in May
Siletz, OR
- Average pressure in May: 30.06"Hg
The month with the highest atmospheric pressure is January (30.09"Hg).
The month with the lowest atmospheric pressure is September (30.02"Hg).
Average wind speed in May
Siletz, OR
- Average wind speed in May: 8.1mph
The windiest month (with the highest average wind speed) is January (9.8mph).
The calmest month (with the lowest average wind speed) is August (6.5mph).
Average humidity in May
Siletz, OR
- Average humidity in May: 81%
The months with the highest relative humidity are February, March, November and December (83%).
The months with the lowest relative humidity are April, May, July, September and October (81%).
Average rainfall in May
Siletz, OR
- Average rainfall in May: 1.02"
The wettest month (with the highest rainfall) is December (3.07").
The driest month (with the least rainfall) is July (0.16").
Average rainfall days in May
Siletz, OR
- Average rainfall days in May: 9.5 days
The month with the highest number of rainy days is March (18.2 days).
The month with the least rainy days is August (3.7 days).
Average snowfall in May
Siletz, OR
- Average snowfall in May: 0"
The month with the highest snowfall is February (0.28").
The months with the least snowfall are March, April, May, June, July, August, September, October and December (0").
Average snowfall days in May
Siletz, OR
- Average snowfall days in May: 0 days
The month with the highest number of snowfall days is February (0.9 days).
The months with the least snowfall days are March, April, May, June, July, August, September and October (0 days).
Average daylight in May /
Average sunshine in May
Siletz, OR
- Average daylight in May: 14h and 48min
The month with the longest days is June (Average daylight: 15h and 30min).
The month with the shortest days is December (Average daylight: 8h and 54min).
- Average sunshine in May: 8h and 24min
The month with the most sunshine is July (Average sunshine: 10h and 42min).
The months with the least sunshine are January and February (Average sunshine: 4h and 0min).
Average sunshine days in May
Siletz, OR
- Average sunshine days in May: 19.4 days
The month with the most sunshine days is July (25.8 days).
The month with the least sunshine days is March (10.9 days).
Average UV index in May
Siletz, OR
- Average UV index in May: 4
The month with the highest UV index is July (UV index 5).
The months with the lowest UV index are February, November and December (UV index 2).
Average cloud cover in May
Siletz, OR
- Average cloud cover in May: 47
The months with the most cloud cover are February and March (Cloud cover 59).
The month with the least cloud cover is July (Cloud cover 29).
Average visibility in May
Siletz, OR
- Average visibility in May: 6mi
The months with the highest visibility are January, February, March, April, May, June, July, October, November and December (6mi).
The months with the lowest visibility are August and September (5mi).
