May weather forecastTualatin, OR
May
Weather in May
In Tualatin, May paints a promising picture of the upcoming summer. This period exhibits clear shifts in the weather pattern with reduced rainfall, dropping to a mere 1.69" (43mm). The attendant rise in temperature starts drawing locals and visitors outdoors to soak in the increased hours of sunshine. As May progresses, the days lengthen noticeably, and the intense UV index insists on a generous use of sunblock. Looking forward to the next month, expect further dip in precipitation, increased sunlight hours, and higher temperatures.Temperature
With the onset of May, Tualatin observes a minor temperature ascent, with the average high-temperature adjusting from April's refreshing 58.5°F (14.7°C) to a comfortable 67.1°F (19.5°C). A striking difference from the daytime highs is registered during May nights, with an average temperature of 44.4°F (6.9°C).Humidity
In Tualatin, the average relative humidity in May is 73%.Rainfall
In Tualatin, in May, during 13.4 rainfall days, 1.69" (43mm) of precipitation is typically accumulated. Throughout the year, there are 170.9 rainfall days, and 30.67" (779mm) of precipitation is accumulated.Snowfall
April through October are months without snowfall.Daylight
In May, the average length of the day is 14h and 55min.On the first day of the month, sunrise is at 5:57 am and sunset at 8:18 pm. On the last day of May, sunrise is at 5:26 am and sunset at 8:51 pm PDT.
Sunshine
The average sunshine in May is 8.8h.UV index
The average daily maximum UV index in May is 4. A UV Index of 3 to 5 symbolizes a moderate health risk from unsafe exposure to UV radiation for average individuals.Note: The maximum UV index, 4 during May, leads to the following recommendations:
Take precautions - Protection against sun damage is advised. Avoiding the Sun during its peak radiation time around midday is a healthy practice. 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
Tualatin, OR
- Average high temperature in May: 67.1°F
The warmest month (with the highest average high temperature) is August (82°F).
The month with the lowest average high temperature is December (44.1°F).
- Average low temperature in May: 44.4°F
The month with the highest average low temperature is August (55°F).
The coldest month (with the lowest average low temperature) is December (34.5°F).
Average pressure in May
Tualatin, OR
- Average pressure in May: 30.03"Hg
The month with the highest atmospheric pressure is January (30.11"Hg).
The months with the lowest atmospheric pressure are August and September (30.01"Hg).
Average wind speed in May
Tualatin, OR
- Average wind speed in May: 4.2mph
The windiest month (with the highest average wind speed) is January (5.5mph).
The calmest month (with the lowest average wind speed) is August (3.9mph).
Average humidity in May
Tualatin, OR
- Average humidity in May: 73%
The months with the highest relative humidity are January, February and December (84%).
The month with the lowest relative humidity is August (63%).
Average rainfall in May
Tualatin, OR
- Average rainfall in May: 1.69"
The wettest month (with the highest rainfall) is December (4.57").
The driest month (with the least rainfall) is July (0.31").
Average rainfall days in May
Tualatin, OR
- Average rainfall days in May: 13.4 days
The month with the highest number of rainy days is March (19.8 days).
The month with the least rainy days is August (4.8 days).
Average snowfall in May
Tualatin, OR
- Average snowfall in May: 0"
The month with the highest snowfall is February (1.57").
The months with the least snowfall are April, May, June, July, August, September and October (0").
Average snowfall days in May
Tualatin, 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
Tualatin, 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
Tualatin, OR
- Average sunshine days in May: 15.7 days
The month with the most sunshine days is July (25 days).
The month with the least sunshine days is February (8.6 days).
Average UV index in May
Tualatin, 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
Tualatin, 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 22).
Average visibility in May
Tualatin, 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).
