September weather forecastChester, Canada
September
Weather in September
The first month of the autumn, September, is still a comfortable month in Chester, Canada, with temperature in the range of an average low of 13.2°C (55.8°F) and an average high of 18.9°C (66°F).Temperature
As Chester enters September, the average high-temperature subtly lowers from the an agreeable 21.9°C (71.4°F) of August to an enjoyable 18.9°C (66°F). September nights observe an average temperature dip to a mild 13.2°C (55.8°F).Humidity
In September, the average relative humidity in Chester is 80%.Rainfall
In Chester, Canada, during September, the rain falls for 10.2 days and regularly aggregates up to 47mm (1.85") of precipitation. Throughout the year, in Chester, there are 148.3 rainfall days, and 861mm (33.9") of precipitation is accumulated.Snowfall
June through October are months without snowfall.Sea temperature
In Chester, Canada, the average seawater temperature in September is 16.3°C (61.3°F).Note: A surface water temperature of 16.3°C (61.3°F) does not provide an enjoyable swimming experience for most. Breathing control becomes more challenging as the water temperature drops below 21°C (69.8°F).
Daylight
The average length of the day in September is 12h and 31min.On the first day of September in Chester, sunrise is at 6:40 am and sunset at 7:53 pm. On the last day of the month, sunrise is at 7:14 am and sunset at 6:58 pm ADT.
Sunshine
In Chester, the average sunshine in September is 8.4h.UV index
The average daily maximum UV index in September is 4. A UV Index estimate of 3 to 5 represents a moderate health risk from exposure to the Sun's UV rays for average individuals.Note: A maximum daily UV index of 4 during September morphs into the following directions:
Take precautions. Light skin individuals may get burned in less than 30 minutes. Limiting exposure to the direct Sun during midday hours can help prevent harmful UV radiation effects. Sun-related eye harm can be minimized with proper sunglasses offering UVA and UVB coverage.
Published by: Weather Atlas | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in September
Chester, Canada
- Average high temperature in September: 18.9°C
The warmest month (with the highest average high temperature) is August (21.9°C).
The month with the lowest average high temperature is February (-0.1°C).
- Average low temperature in September: 13.2°C
The month with the highest average low temperature is August (16.1°C).
The coldest months (with the lowest average low temperature) are January and February (-5.5°C).
Average pressure in September
Chester, Canada
- Average pressure in September: 1017.1mbar
The month with the highest atmospheric pressure is September (1017.1mbar).
The month with the lowest atmospheric pressure is February (1012.4mbar).
Average wind speed in September
Chester, Canada
- Average wind speed in September: 16.6km/h
The windiest month (with the highest average wind speed) is January (21.3km/h).
The calmest month (with the lowest average wind speed) is July (14km/h).
Average humidity in September
Chester, Canada
- Average humidity in September: 80%
The month with the highest relative humidity is February (84%).
The month with the lowest relative humidity is October (79%).
Average rainfall in September
Chester, Canada
- Average rainfall in September: 47mm
The wettest month (with the highest rainfall) is December (98mm).
The driest month (with the least rainfall) is July (38mm).
Average rainfall days in September
Chester, Canada
- Average rainfall days in September: 10.2 days
The month with the highest number of rainy days is April (14.8 days).
The month with the least rainy days is February (8.8 days).
Average snowfall in September
Chester, Canada
- Average snowfall in September: 0mm
The month with the highest snowfall is January (113mm).
The months with the least snowfall are June, July, August, September and October (0mm).
Average snowfall days in September
Chester, Canada
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is January (12.5 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average sea temperature in September
Chester, Canada
- Average sea temperature in September: 16.3°C
The best month for swimming (with the highest average sea temperature) is August (16.8°C).
The coldest months (with the lowest average sea temperature) are February and March (1.1°C).
Average daylight in September /
Average sunshine in September
Chester, Canada
- Average daylight in September: 12h and 30min
The month with the longest days is June (Average daylight: 15h and 30min).
The month with the shortest days is December (Average daylight: 8h and 54min).
- Average sunshine in September: 8h and 24min
The month with the most sunshine is August (Average sunshine: 9h and 24min).
The month with the least sunshine is February (Average sunshine: 3h and 18min).
Average sunshine days in September
Chester, Canada
- Average sunshine days in September: 17.5 days
The month with the most sunshine days is September (17.5 days).
The month with the least sunshine days is February (9.8 days).
Average UV index in September
Chester, Canada
- Average UV index in September: 4
The months with the highest UV index are July and August (UV index 5).
The month with the lowest UV index is January (UV index 1).
Average cloud cover in September
Chester, Canada
- Average cloud cover in September: 37
The month with the most cloud cover is February (Cloud cover 67).
The month with the least cloud cover is August (Cloud cover 35).
Average visibility in September
Chester, Canada
- Average visibility in September: 9km
The months with the highest visibility are January, February, March, April, May, June, July, August, September, October, November and December (9km).
The months with the lowest visibility are January, February, March, April, May, June, July, August, September, October, November and December (9km).
