May weather forecastOregon City, OR
May
Weather in May
May exhibits the true spirit of the spring season in Oregon City as the weather continues to warm. The city in May is characterized by blossoming flora under the increasingly common sunshine. A major shift observed in this month pertains to the considerable decrease of rainfall to 1.81" (46mm) over approximately 13.7 days. The moderate temperatures and low rainfall combine to make May one of the more favorable months for outdoor activities. By the month's end, the impending summer season's heat is perceptible.Temperature
As May arrives, a slight rise in the average high-temperature is observed, moving from 58.5°F (14.7°C) in April to a still refreshing 66.6°F (19.2°C). Oregon City experiences a significant downturn from peak daytime temperatures throughout May, with the average low-temperature dipping to a chilly 43.5°F (6.4°C).Humidity
In May, the average relative humidity is 74%.Rainfall
In Oregon City, in May, during 13.7 rainfall days, 1.81" (46mm) of precipitation is typically accumulated. In Oregon City, Oregon, during the entire year, the rain falls for 169.9 days and collects up to 32.76" (832mm) of precipitation.Snowfall
In Oregon City, snow does not fall in April through October.Daylight
In Oregon City, the average length of the day in May is 14h and 55min.On the first day of May, sunrise is at 5:57 am and sunset at 8:17 pm. On the last day of the month, sunrise is at 5:25 am and sunset at 8:50 pm PDT.
Sunshine
In Oregon City, the average sunshine in May is 9h.UV index
The average daily maximum UV index in May is 4. A UV Index reading of 3 to 5 represents a medium vulnerability from exposure to the Sun's UV radiation for ordinary individuals.Note: A daily high UV index of 4 in May leads to these guidelines:
Undertake precautions - Obligation exists to protect against skin and eye damage. The Sun is at its harshest during midday; protect yourself by staying in shaded areas and minimizing exposure. Combat UV radiation's detrimental effects with sun-safe clothing and UV-blocking eyewear.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in May
Oregon City, OR
- Average high temperature in May: 66.6°F
The warmest month (with the highest average high temperature) is August (81.1°F).
The month with the lowest average high temperature is December (44.4°F).
- Average low temperature in May: 43.5°F
The month with the highest average low temperature is August (54°F).
The coldest month (with the lowest average low temperature) is December (34.3°F).
Average pressure in May
Oregon City, OR
- Average pressure in May: 30.03"Hg
The month with the highest atmospheric pressure is January (30.12"Hg).
The month with the lowest atmospheric pressure is August (30"Hg).
Average wind speed in May
Oregon City, OR
- Average wind speed in May: 4.1mph
The windiest month (with the highest average wind speed) is January (6mph).
The calmest month (with the lowest average wind speed) is August (3.5mph).
Average humidity in May
Oregon City, OR
- Average humidity in May: 74%
The month with the highest relative humidity is February (84%).
The month with the lowest relative humidity is August (64%).
Average rainfall in May
Oregon City, OR
- Average rainfall in May: 1.81"
The wettest month (with the highest rainfall) is December (5.16").
The driest month (with the least rainfall) is July (0.24").
Average rainfall days in May
Oregon City, OR
- Average rainfall days in May: 13.7 days
The month with the highest number of rainy days is March (20.3 days).
The month with the least rainy days is August (4 days).
Average snowfall in May
Oregon City, OR
- Average snowfall in May: 0"
The month with the highest snowfall is February (1.5").
The months with the least snowfall are April, May, June, July, August, September and October (0").
Average snowfall days in May
Oregon City, 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 April, May, June, July, August, September and October (0 days).
Average daylight in May /
Average sunshine in May
Oregon City, OR
- Average daylight in May: 14h and 54min
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: 9h and 0min
The month with the most sunshine is August (Average sunshine: 11h and 6min).
The month with the least sunshine is February (Average sunshine: 4h and 18min).
Average sunshine days in May
Oregon City, OR
- Average sunshine days in May: 15.8 days
The month with the most sunshine days is July (26.2 days).
The month with the least sunshine days is February (8.1 days).
Average UV index in May
Oregon City, OR
- Average UV index in May: 4
The month with the highest UV index is July (UV index 6).
The months with the lowest UV index are January, February, November and December (UV index 2).
Average cloud cover in May
Oregon City, OR
- Average cloud cover in May: 46
The month with the most cloud cover is February (Cloud cover 57).
The month with the least cloud cover is August (Cloud cover 22).
Average visibility in May
Oregon City, OR
- Average visibility in May: 5mi
The months with the highest visibility are July, August, September and October (6mi).
The months with the lowest visibility are January, February, March, April, May, June, November and December (5mi).
