May weather forecast
Tualatin, OR

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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

Observing a slight rise in May, the average high-temperature shifts from April's refreshing 58.5°F (14.7°C) to a comfortable 67.1°F (19.5°C). Tualatin records a pronounced decline from the day's peak to an average nighttime low-temperature of 44.4°F (6.9°C) throughout May.

Humidity

In Tualatin, Oregon, the average relative humidity in May is 73%.

Rainfall

In Tualatin, in May, it is raining for 13.4 days, with typically 1.69" (43mm) of accumulated precipitation. In Tualatin, during the entire year, the rain falls for 170.9 days and collects up to 30.67" (779mm) of precipitation.

Snowfall

In Tualatin, snow does not fall in April through October.

Daylight

The average length of the day in May in Tualatin 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, in Tualatin, sunrise is at 5:26 am and sunset at 8:51 pm PDT.

Sunshine

The average sunshine in May is 8.8h.

UV index

In May, the average daily maximum UV index is 4. A UV Index value of 3 to 5 symbolizes a medium health hazard from exposure to the Sun's UV radiation for the ordinary person.
Note: In May, a daily maximum UV index of 4 leads to the following instructions:
Prioritize safety - Suggestions to prevent sun damage are offered. The midday Sun can be dangerous due to its intense radiation; always find shade and reduce exposure. Boost your sun resistance with garments that are densely woven yet spacious.
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Frequently asked questions

What is the average May temperature in Tualatin?

The average high-temperature, in May, in Tualatin, is 67.1°F (19.5°C), while the average low-temperature is 44.4°F (6.9°C).

What is the average humidity in May in Tualatin?

In May, the average relative humidity in Tualatin, Oregon, is 73%.

How much does it rain in Tualatin in May?

In Tualatin, Oregon, in May, during 13.4 rainfall days, 1.69" (43mm) of precipitation is typically accumulated.

When it does not snow in Tualatin?

In Tualatin, snow does not fall in April through October.

What is the average length of the day in May in Tualatin?

In May, the average day length is 14h and 55min.

What time are sunrise and sunset in May in Tualatin?

On the first day of May in Tualatin, sunrise is at 5:57 am and sunset at 8:18 pm. On the last day of the month, sunrise is at 5:26 am and sunset at 8:51 pm PDT.

How long on average sun shines in May in Tualatin?

In May, the average sunshine duration is 8.8h.

How high is the UV index in May in Tualatin?

In May, the average daily maximum UV index is 4. A UV Index of 3 to 5 symbolizes a medium hazard to health from exposure to the Sun's UV radiation.
Average humidity
Average rainfall days
Average snowfall
Average snowfall days
Average daylight
Average sunshine
Average sunshine days
Average UV index
Average cloud cover
Average visibility

Average temperature in May
Tualatin, OR

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).

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Average pressure in May
Tualatin, OR

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).

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Average wind speed in May
Tualatin, OR

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).

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Average humidity in May
Tualatin, OR

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%).

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Average rainfall in May
Tualatin, OR

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").

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Average rainfall days in May
Tualatin, OR

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).

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Average snowfall in May
Tualatin, OR

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").

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Average snowfall days in May
Tualatin, OR

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).

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Average daylight in May /
Average sunshine in May
Tualatin, OR

Average daylight in May / Average sunshine in May - Tualatin, OR
  • Average daylight in May: 14h and 5min

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 5min

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).

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Average sunshine days in May
Tualatin, OR

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).

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Average UV index in May
Tualatin, OR

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).

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Average cloud cover in May
Tualatin, OR

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).

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Average visibility in May
Tualatin, OR

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).

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Tualatin, Oregon, USA

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