Saint Helens
Oregon, USA
Long-term weather forecast
Long-term weather forecast

May weather forecast and climate
Saint Helens, OR

The last month of the spring, May, is a pleasant month in Saint Helens, Oregon, with temperature in the range of an average high of 69.4°F (20.8°C) and an average low of 45.7°F (7.6°C).

Temperature

In Saint Helens, the average high-temperature marginally rises, from a comfortable 63.1°F (17.3°C) in April, to a pleasant 69.4°F (20.8°C). In Saint Helens, the average low-temperature is 45.7°F (7.6°C).

Rainfall

In May, the rain falls for 12 days. Throughout May, 2.8" (71.6mm) of precipitation is accumulated. Throughout the year, in Saint Helens, there are 150 rainfall days, and 43.8" (1112.9mm) of precipitation is accumulated.

Snowfall

Throughout the year, in Saint Helens, 2.9" (73.7mm) of snow is accumulated.

Daylight

The average length of the day in May in Saint Helens is 15h.

What is the temperature in May in Saint Helens?

In May, the average high-temperature is 69.4°F (20.8°C), and the average low-temperature is 45.7°F (7.6°C).

How much does it rain in Saint Helens in May?

In Saint Helens, Oregon, in May, during 12 rainfall days, 2.8" (71.6mm) of precipitation is typically accumulated.

What is the average length of the day in May in Saint Helens?

In May, the average length of the day in Saint Helens is 15h.
Average temperature in May - Saint Helens, OR
  • Average high temperature in May: 69.4°F

The warmest month (with the highest average high temperature) is August (82.4°F).
The month with the lowest average high temperature is December (45.7°F).

  • Average low temperature in May: 45.7°F

The month with the highest average low temperature is August (55.4°F).
The coldest month (with the lowest average low temperature) is January (33.1°F).

Average rainfall in May - Saint Helens, OR
  • Average rainfall in May: 2.8"

The wettest month (with the highest rainfall) is December (6.8").
The driest month (with the lowest rainfall) is July (0.7").

Average rainfall days in May - Saint Helens, OR
  • Average rainfall days in May: 12 days

Months with the highest number of rainy days are January, November and December (18 days).
The month with the lowest number of rainy days is July (4 days).

Average snowfall in May - Saint Helens, OR
  • Average snowfall in May: 0"

The month with the highest snowfall is January (1.3").
Months with the lowest snowfall are March, April, May, June, July, August, September and October (0").

Average daylight in May - Saint Helens, OR
  • Average daylight in May: 15h

The month with the longest days is June (Average daylight: 15.7h).
The month with shortest days is December (Average daylight: 8.7h).