Saint Helens Weather & Climate: Best Time to Visit

Depending on the time of the year, temperatures range from pleasant to chilly in Saint Helens. Typically, average maximum daytime temperatures range from a pleasant 21°C (70°F) in July to a chilly 9°C (48°F) in the coolest month, January.

Nights vary from 13°C (55°F) in July to around 3°C (37°F) during the colder months.

Check out our detailed temperature page for more information.

Temperature ranges by month

Saint Helens has a relatively rainy climate with high precipitation levels, averaging 1024 mm (40 in) of rainfall annually. Precipitation levels in Saint Helens remain relatively steady throughout the year. December has the most rain, with 99 mm (3.9 in) over 18 days. In the driest month March, this drops slightly to 72 mm (2.8 in), making the city's climate fairly predictable. For more details, please visit our Saint Helens Precipitation page.

The mean monthly precipitation over the year, including rain, hail, and snow

The average number of days each month with precipitation

For those who appreciate different seasons, Saint Helens serves as an ideal destination. Expect longer, more sun-filled days in May with an average of 6.2 hours of sunshine daily, and embrace the darker days in January, offering only 1.5 hours of daily sunlight.

Visit our detailed sunshine hours page for more information.

Monthly hours of sunshine

Daily hours of sunshine