The Dalles
Oregon, USA
Long-term weather forecast
Long-term weather forecast

May weather forecast and climate
The Dalles, OR

May, the last month of the spring, in The Dalles, is a warm month, with average temperature ranging between max 73.9°F (23.3°C) and min 50°F (10°C).

Temperature

In May, the average high-temperature rises, from an enjoyable 64.9°F (18.3°C) in April, to a moderately hot 73.9°F (23.3°C). In May, the average low-temperature is 50°F (10°C).

Rainfall

In The Dalles, during 8 rainfall days, 0.6" (15.2mm) of precipitation is typically accumulated. In The Dalles, during the entire year, the rain falls for 105 days and collects up to 14.2" (360.7mm) of precipitation.

Daylight

The average length of the day in May is 14.9h.

Sunshine

In The Dalles, the average sunshine in May is 9h.

UV index

In The Dalles, the average daily maximum UV index is 7. A UV Index value of 6 to 7 symbolizes a high health risk from unsafe exposure to the UV radiation for average individuals.
The daily maximum UV index of 7 in May interpret into the following advice:
Take precautions and adopt sun safety practices. Protection against sunburn is obliged. Seek shade and minimize exposure to direct Sun in a period between 10 a.m. and 4 p.m. when UV radiation is most intense; keep in mind that shade structures like parasols or canopies do not provide perfect sun protection. A wide-brim hat offers excellent sun protection for eyes, ears, face, and neck. Sunglasses with UVA and UVB protection significantly reduce eye damage from sun exposure. Tightly woven, loose-fitting clothes provide additional protection from the Sun.

What is the temperature in May in The Dalles?

In The Dalles, Oregon, in May, the average high-temperature is 73.9°F (23.3°C), and the average low-temperature is 50°F (10°C).

How many days does it rain in May in The Dalles?

In The Dalles, Oregon, in May, it is raining for 8 days, with typically 0.6" (15.2mm) of accumulated precipitation.

How many hours of daylight does The Dalles have in May?

The average length of the day in May in The Dalles is 14.9h.

How many hours of sunshine does The Dalles have in May?

In May, the average sunshine in The Dalles, Oregon, is 9h.

What is the UV index reading in May in The Dalles?

In May, the average daily maximum UV index in The Dalles is 7. A UV Index value of 6 to 7 symbolizes a high health vulnerability from unprotected exposure to the UV radiation.
Average temperature in May - The Dalles, OR
  • Average high temperature in May: 74°F

Warmest months (with the highest average high temperature) are July and August (88°F).
The month with the lowest average high temperature is January (41°F).

  • Average low temperature in May: 50°F

Months with the highest average low temperature are July and August (61°F).
Coldest months (with the lowest average low temperature) are January and December (30°F).

Average rainfall in May - The Dalles, OR
  • Average rainfall in May: 0.6"

Wettest months (with the highest rainfall) are January and December (2.6").
The driest month (with the lowest rainfall) is July (0.2").

Average rainfall days in May - The Dalles, OR
  • Average rainfall days in May: 8 days

The month with the highest number of rainy days is December (14 days).
The month with the lowest number of rainy days is July (3 days).

Average daylight in May / Average sunshine in May - The Dalles, OR
  • Average daylight in May: 14.9h

The month with the longest days is June (Average daylight: 15.6h).
The month with shortest days is December (Average daylight: 8.8h).

  • Average sunshine in May: 9h

The month with most sunshine is July (Average sunshine: 12h).
The month with least sunshine is December (Average sunshine: 2h).

Average UV index in May - The Dalles, OR
  • Average UV index in May: 7

The month with the highest UV index is July (UV index 8).
Months with the lowest UV index are January, November and December (UV index 1).