Saint Helens Weather in September

What's the weather like in Saint Helens (Oregon) in September 2024?

The climate in Saint Helens during September can be summarized as mild and reasonably dry.

September is in the fall / autumn in Saint Helens and is typically the 4th warmest month of the year. Daytime maximum temperatures average around 22°C (72°F), whilst at night 8°C (47°F) is normal.

Saint Helens weather averages (imperial / metric)
Daytime temperature 22°C 71.6°F
Nightly temperature 8.2°C 46.8°F
Average temperature 15.1°C 59.2°F
Daily sunshine 8.3 hrs
Avg rainfall 55 mm 2.2 ins
Rainy days 8 days
Sea temperature 13.3°C 55.9°F
Humidity 71%
Windspeed 11.5kph 7 mph

On average September is the 4th driest month of the year in Saint Helens with around 55mm 2.2 inches of rain making it a reasonably dry time to visit. This rainfall is typically spread over 8 days, although this may vary considerably.

On the flip side this corresponds to an average of 8.3 hours of sunshine per day.

September temperatures in Saint Helens

Saint Helens average temperature in September

September rainfall

Saint Helens average rain in September

September hourly sunshine

Saint Helens average rain in September

The data used in these monthly averages covers a period of over 100 years right up until last year. As such they are a valid prediction of what to expect for the weather in Saint Helens in September 2024.

Other monthly averages

Best places to visit in September

UV index Best time to go?

Beta

Current (hourly) weather 15 day forecast

Saint Helens weather stats

Saint Helens weather statistics
Hottest month: August 24.4°C 75.9°F
Driest month: July 22mm 0.9ins
Sunniest month: July 11.2hrs
Coldest month: January 6.8°C 44.2°F
Wettest month: December 202mm 8ins
Map showing location of Saint Helens (45.864, -122.80649) Saint Helens map pin © Google

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