Normal weather in Saint Helens in September
The weather in Saint Helens in September has an average temperature of around 20°C during the day. On average, September sees 46 mm of rain in Saint Helens. The wind speed is 4 Beaufort and mainly comes from South.
After August, September in Saint Helens starts with a temperature of 21°C and ends around October at 18°C.
September averages for Saint Helens
![]() | 20°C |
![]() | 22°C |
![]() | 18°C |
![]() | 46 mm |
![]() | 13 days |
Temperature per day in September in Saint Helens
This graph shows the average daily maximum temperatures in September in Saint Helens, indicated in degrees Celsius.
Precipitation per day in September in Saint Helens
This graph shows the average daily precipitation in September in Saint Helens, indicated in millimeters.
UV index per day in September in Saint Helens
This graph shows the average daily UV index in September in Saint Helens.
Yearly temperature in September in Saint Helens
This graph shows the average yearly temperature in September in Saint Helens, measured in degrees Celsius, over the past years.
Yearly total precipitation in September in Saint Helens
This graph shows the average yearly precipitation in millimeters in September in Saint Helens, over the past years.
Average daily weather in September
Click on a day to get more information about the average weather on that day.
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Average weather in Saint Helens per month
Click on a month below to see in detail how the weather typically is in Saint Helens and what to expect. Based on the historical weather data of Saint Helens, you can view the average temperature, precipitation, wind, and UV index for each day of the month.