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

Monthly weather forecast and climate
Saint Helens, OR

January is a frosty winter month in Saint Helens, Oregon, with average temperature fluctuating between 32.9°F (0.5°C) and 43.9°F (6.6°C). In Saint Helens, the average high-temperature is relatively the same as in December - a chilly 43.9°F (6.6°C). Weather in January »

The last month of the winter, February, is another chilly month in Saint Helens, Oregon, with average temperature ranging between max 44.6°F (7°C) and min 32.5°F (0.3°C). In Saint Helens, the average high-temperature in February is relatively the same as in January - a still frosty 44.6°F (7°C). Weather in February »

March, the first month of the spring, in Saint Helens, is also a frosty month, with temperature in the range of an average low of 33.8°F (1°C) and an average high of 48.7°F (9.3°C). In Saint Helens, the average high-temperature is almost the same as in February - a still frosty 48.7°F (9.3°C). Weather in March »

April in Saint Helens, Oregon, is a fresh spring month, with average temperature ranging between min 36.1°F (2.3°C) and max 54.3°F (12.4°C). In April, the average high-temperature slightly increases, from a frosty 48.7°F (9.3°C) in March, to a cool 54.3°F (12.4°C). Weather in April »

May, the last month of the spring, in Saint Helens, is an enjoyable month, with average temperature varying between 62.8°F (17.1°C) and 39.9°F (4.4°C). In Saint Helens, Oregon, the average high-temperature in May slightly increases, from a cool 54.3°F (12.4°C) in April, to a comfortable 62.8°F (17.1°C). Weather in May »

June, the first month of the summer, in Saint Helens, is also an enjoyable month, with temperature in the range of an average high of 67.6°F (19.8°C) and an average low of 43°F (6.1°C). In June, the average high-temperature is essentially the same as in May - a still comfortable 67.6°F (19.8°C). Weather in June »

July is a warm summer month in Saint Helens, Oregon, with average temperature fluctuating between 75.4°F (24.1°C) and 46.6°F (8.1°C). In July, the average high-temperature marginally rises, from an enjoyable 67.6°F (19.8°C) in June, to a moderately hot 75.4°F (24.1°C). Weather in July »

The last month of the summer, August, is another warm month in Saint Helens, Oregon, with average temperature fluctuating between 47.8°F (8.8°C) and 76.5°F (24.7°C). With an average high-temperature of 76.5°F (24.7°C) and an average low-temperature of 47.8°F (8.8°C), August is the warmest month. Weather in August »

The first month of the autumn, September, is still a pleasant month in Saint Helens, Oregon, with average temperature ranging between min 45.5°F (7.5°C) and max 69.3°F (20.7°C). In Saint Helens, Oregon, the average high-temperature in September marginally drops, from a warm 76.5°F (24.7°C) in August, to a pleasant 69.3°F (20.7°C). Weather in September »

October, the same as September, in Saint Helens, Oregon, is another mild autumn month, with average temperature fluctuating between 58.1°F (14.5°C) and 41.7°F (5.4°C). In Saint Helens, the average high-temperature decreases, from an agreeable 69.3°F (20.7°C) in September, to a mild 58.1°F (14.5°C). Weather in October »

November, the last month of the autumn, in Saint Helens, is another chilly month, with average temperature ranging between min 36.7°F (2.6°C) and max 47.7°F (8.7°C). In Saint Helens, Oregon, the average high-temperature in November decreases, from a moderate 58.1°F (14.5°C) in October, to a chilly 47.7°F (8.7°C). Weather in November »

December, the first month of the winter, in Saint Helens, is still a cold month, with average temperature varying between 41.9°F (5.5°C) and 31.8°F (-0.1°C). With an average high-temperature of 41.9°F (5.5°C) and an average low-temperature of 31.8°F (-0.1°C), December is the coldest month. Weather in December »

How many days does it rain in Saint Helens?

In Saint Helens, during the entire year, the rain falls for 149 days and collects up to 19.37" (492mm) of precipitation.

What is the wettest month in Saint Helens?

The month with the most rainfall in Saint Helens, Oregon, is January when the rain falls for 14.5 days and typically aggregates up to 2.64" (67mm) of precipitation.

When does it snow in Saint Helens?

January through April, November and December are months with snowfall in Saint Helens, Oregon.

How much does it snow in Saint Helens?

Throughout the year, in Saint Helens, there are 10.2 snowfall days, and 5.91" (150mm) of snow is accumulated.

What is the snowiest month in Saint Helens?

January is the month with the most snowfall in Saint Helens, Oregon. Snow falls for 2.1 days and accumulates 1.97" (50mm) of snow.

What is the month with the least sunshine in Saint Helens?

Months with the least sunshine in Saint Helens are January, February and December, with an average of 3.7h of sunshine.

What is the most humid month in Saint Helens?

February is the most humid month in Saint Helens, with an average relative humidity of 88%.

When it does not snow in Saint Helens?

May through October are months without snowfall in Saint Helens, Oregon.

When are the longest days in Saint Helens?

With an average of 15.7h of daylight, June has the longest days of the year in Saint Helens.

What are the least humid months in Saint Helens?

Months with the lowest humidity in Saint Helens are July and August, with an average relative humidity of 72%.

What is the driest month in Saint Helens?

The month with the least rainfall in Saint Helens is July when the rain falls for 5.9 days and typically collects 0.31" (8mm) of precipitation.

What is the month with the highest UV index in Saint Helens?

With an average maximum UV index of 5, July is the month with the highest UV index in Saint Helens.

What is the warmest month in Saint Helens?

August is the warmest month, with an average high-temperature of 76.5°F (24.7°C) and an average low-temperature of 47.8°F (8.8°C).

What month has the most sunshine in Saint Helens?

With an average of 10.4h of sunshine, August has the most sunshine of the year in Saint Helens.

What is the month with the lowest UV index in Saint Helens?

With an average maximum UV index of 1, November is the month with the lowest UV index.

What is the coldest month in Saint Helens?

December is the coldest month in Saint Helens, with an average high-temperature of 41.9°F (5.5°C) and an average low-temperature of 31.8°F (-0.1°C).

What is the month with the shortest days in Saint Helens?

The month with the shortest days is December, with an average of 8.7h of daylight.
Average temperature - Saint Helens, OR
Average humidity - Saint Helens, OR
Average rainfall - Saint Helens, OR

The wettest month (with the highest rainfall) is January (2.64").
The driest month (with the lowest rainfall) is July (0.31").

Average rainfall days - Saint Helens, OR

The month with the highest number of rainy days is March (16 days).
The month with the lowest number of rainy days is July (5.9 days).

Average snowfall - Saint Helens, OR

The month with the highest snowfall is January (1.97").
Months with the lowest snowfall are May, June, July, August, September and October (0").

Average snowfall days - Saint Helens, OR

The month with the highest number of snowfall days is February (3.6 days).
Months with the lowest number of snowfall days are May, June, July, August, September and October (0 days).

Average daylight / Average sunshine - Saint Helens, OR

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

The month with most sunshine is August (Average sunshine: 10.4h).
Months with least sunshine are January, February and December (Average sunshine: 3.7).