May weather forecastDallas, OR
May
Weather in May
The arrival of May signals the onset of warmer weather in Dallas, with moderately high temperatures and extended daylight hours. Abundant sunshine coupled with the temperature range of 42.4°F (5.8°C) to 65.3°F (18.5°C) brings life to the city. Despite being one of the driest months with only 0.98" (25mm) of rainfall, May doesn't disappoint with its vivacious display of spring flowers. The pleasing weather in May makes it one of the most enjoyable times to experience the city's outdoor amenities.Temperature
The shift into May is accompanied by a modest temperature increase, with the average high-temperature edging up from a moderate 57.2°F (14°C) in April to a still refreshing 65.3°F (18.5°C). Nightly readings in May display a noticeable downturn from daily highs, with the average low-temperature registering a cold 42.4°F (5.8°C).Humidity
In May, the average relative humidity is 78%.Rainfall
In Dallas, during May, the rain falls for 11.7 days and regularly aggregates up to 0.98" (25mm) of precipitation. In Dallas, during the entire year, the rain falls for 139.9 days and collects up to 15.39" (391mm) of precipitation.Snowfall
In Dallas, Oregon, snow does not fall in April through October.Daylight
The average length of the day in May in Dallas is 14h and 52min.On the first day of May in Dallas, sunrise is at 6:01 am and sunset at 8:19 pm. On the last day of the month, sunrise is at 5:30 am and sunset at 8:52 pm PDT.
Sunshine
In May, the average sunshine is 8.2h.UV index
In Dallas, the average daily maximum UV index in May is 4. A UV Index estimate of 3 to 5 represents a moderate health risk from exposure to the Sun's UV radiation for the ordinary person.Note: The maximum daily UV index of 4 in May converts into the following recommendations:
Take precautions - Protection against skin and eye damage is obliged. Being exposed to the midday Sun can have harmful effects due to strong UV radiation; always take precautions. Equip yourself with UVA and UVB-filtering sunglasses on clear, sunny days.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in May
Dallas, OR
- Average high temperature in May: 65.3°F
The warmest month (with the highest average high temperature) is August (80.2°F).
The month with the lowest average high temperature is December (44.2°F).
- Average low temperature in May: 42.4°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 (34°F).
Average pressure in May
Dallas, 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
Dallas, 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 (3.9mph).
Average humidity in May
Dallas, OR
- Average humidity in May: 78%
The month with the highest relative humidity is December (89%).
The month with the lowest relative humidity is August (69%).
Average rainfall in May
Dallas, OR
- Average rainfall in May: 0.98"
The wettest month (with the highest rainfall) is December (2.4").
The driest month (with the least rainfall) is July (0.24").
Average rainfall days in May
Dallas, OR
- Average rainfall days in May: 11.7 days
The month with the highest number of rainy days is March (17.4 days).
The month with the least rainy days is August (3.9 days).
Average snowfall in May
Dallas, OR
- Average snowfall in May: 0"
The month with the highest snowfall is February (1.18").
The months with the least snowfall are April, May, June, July, August, September and October (0").
Average snowfall days in May
Dallas, OR
- Average snowfall days in May: 0 days
The month with the highest number of snowfall days is February (1.5 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
Dallas, OR
- Average daylight in May: 14h and 54min
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 48min).
- Average sunshine in May: 8h and 12min
The months with the most sunshine are July and August (Average sunshine: 10h and 48min).
The month with the least sunshine is February (Average sunshine: 3h and 42min).
Average sunshine days in May
Dallas, OR
- Average sunshine days in May: 16.9 days
The month with the most sunshine days is July (26.1 days).
The month with the least sunshine days is March (11.6 days).
Average UV index in May
Dallas, OR
- Average UV index in May: 4
The months with the highest UV index are June, July and August (UV index 5).
The months with the lowest UV index are January, February, November and December (UV index 2).
Average cloud cover in May
Dallas, OR
- Average cloud cover in May: 50
The month with the most cloud cover is February (Cloud cover 64).
The month with the least cloud cover is August (Cloud cover 25).
Average visibility in May
Dallas, OR
- Average visibility in May: 5mi
The months with the highest visibility are May, June, July, August, September and October (5mi).
The months with the lowest visibility are January, February, March, April, November and December (4mi).
