May weather forecastTroutdale, OR
May
Weather in May
May expresses the full vigor of spring; flowers bloom and temperatures rise in Troutdale. One noticeable characteristic of this month is a notable reduction in rainfall, with average precipitation dropping to 2.01" (51mm). As daylight time increases, sunshine becomes more frequent, resulting in an increase in UV indices. Wind speeds remain low and the visibility is usually clear, making May an ideal month for sight-seeing and outdoor activities. Hence, the balmy weather and sunny skies make May the picturesque month of spring.Temperature
May's arrival coincides with a rise in the average high-temperature, moving from April's mild 56.8°F (13.8°C) to an enjoyable 65.8°F (18.8°C). In the face of high daytime temperatures, Troutdale witnesses a consistent average nighttime low of 42.6°F (5.9°C) during May.Humidity
In Troutdale, the average relative humidity in May is 73%.Rainfall
In Troutdale, during May, the rain falls for 14.3 days and regularly aggregates up to 2.01" (51mm) of precipitation. In Troutdale, Oregon, during the entire year, the rain falls for 171 days and collects up to 37.2" (945mm) of precipitation.Snowfall
April through October are months without snowfall.Daylight
The average length of the day in May is 14h and 56min.On the first day of May in Troutdale, sunrise is at 5:56 am and sunset at 8:17 pm. On the last day of the month, sunrise is at 5:24 am and sunset at 8:50 pm PDT.
Sunshine
In Troutdale, the average sunshine in May is 8.8h.UV index
In Troutdale, 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 UV index of 4 in May translates into the following recommendations:
Prioritize safety - The need to safeguard skin and eyes from harm is emphasized. The Sun's harshest UV rays are around midday; it's wise to seek shade and limit time outdoors. Stay sun-safe with clothing that is both closely woven and worn loosely.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in May
Troutdale, OR
- Average high temperature in May: 65.8°F
The warmest month (with the highest average high temperature) is August (79.7°F).
The month with the lowest average high temperature is December (43.3°F).
- Average low temperature in May: 42.6°F
The month with the highest average low temperature is August (52.7°F).
The coldest month (with the lowest average low temperature) is December (33.3°F).
Average pressure in May
Troutdale, OR
- Average pressure in May: 30.02"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
Troutdale, OR
- Average wind speed in May: 4.2mph
The windiest month (with the highest average wind speed) is January (6.8mph).
The calmest month (with the lowest average wind speed) is August (3.5mph).
Average humidity in May
Troutdale, OR
- Average humidity in May: 73%
The month with the highest relative humidity is February (84%).
The month with the lowest relative humidity is August (65%).
Average rainfall in May
Troutdale, OR
- Average rainfall in May: 2.01"
The wettest month (with the highest rainfall) is December (5.63").
The driest month (with the least rainfall) is July (0.31").
Average rainfall days in May
Troutdale, OR
- Average rainfall days in May: 14.3 days
The month with the highest number of rainy days is March (19.6 days).
The month with the least rainy days is August (4.1 days).
Average snowfall in May
Troutdale, OR
- Average snowfall in May: 0"
The month with the highest snowfall is February (1.54").
The months with the least snowfall are April, May, June, July, August, September and October (0").
Average snowfall days in May
Troutdale, 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
Troutdale, 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: 8h and 48min
The month with the most sunshine is August (Average sunshine: 11h and 0min).
The month with the least sunshine is February (Average sunshine: 4h and 6min).
Average sunshine days in May
Troutdale, OR
- Average sunshine days in May: 15.3 days
The month with the most sunshine days is August (25.3 days).
The month with the least sunshine days is February (8.6 days).
Average UV index in May
Troutdale, 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
Troutdale, OR
- Average cloud cover in May: 46
The month with the most cloud cover is February (Cloud cover 58).
The month with the least cloud cover is August (Cloud cover 24).
Average visibility in May
Troutdale, OR
- Average visibility in May: 5mi
The months with the highest visibility are July, August and September (6mi).
The months with the lowest visibility are January, February, March, April, May, June, October, November and December (5mi).
