Contents
- Weather in September
- Frequently asked questions
- Average temperature in September
- Average pressure in September
- Average wind speed in September
- Average humidity in September
- Average rainfall in September
- Average rainfall days in September
- Average snowfall in September
- Average snowfall days in September
- Average sea temperature in September
- Average daylight in September
- Average sunshine in September
- Average sunshine days in September
- Average UV index in September
- Average cloud cover in September
- Average visibility in September
Weather in September
Temperature
The shift from August to September coincides with a small decrease in the average high-temperature, down to a refreshing 18.9°C (66°F) from a pleasant 21.9°C (71.4°F). Dartmouth observes an average low-temperature of 13.2°C (55.8°F) during September.Humidity
The average relative humidity in September is 80%.Rainfall
In September, the rain falls for 10.2 days. Throughout September, 47mm (1.85") of precipitation is accumulated. Throughout the year, there are 148.3 rainfall days, and 861mm (33.9") of precipitation is accumulated.Snowfall
In Dartmouth, snow does not fall in June through October.Sea temperature
In September, the average sea temperature is 16.6°C (61.9°F).Note: Swimming in 16.6°C (61.9°F) is not a pleasurable activity for the majority of people. Breathing becomes increasingly challenging as water temperature descends from 21°C (69.8°F) to 15°C (59°F).
Daylight
In September, the average length of the day in Dartmouth is 12h and 31min.On the first day of September, sunrise is at 6:37 am and sunset at 7:50 pm. On the last day of the month, sunrise is at 7:11 am and sunset at 6:56 pm ADT.
Sunshine
In September, the average sunshine is 8.4h.UV index
In Dartmouth, the average daily maximum UV index in September is 4. A UV Index estimate of 3 to 5 represents a medium health hazard from exposure to the Sun's UV rays for average individuals.Note: The daily high UV index of 4 during September translates into the following recommendations:
Be cautious. Those with fair skin can be subjected to burns in fewer than 30 minutes. The Sun's most intense and consequently most harmful UV radiation during midday hours should be decreased by minimizing exposure and seeking shade. Protect your eyes, ears, face, and neck from the Sun by wearing a wide-brimmed hat.
Frequently asked questions
What is the usual temperature for Dartmouth in September?
What is the average humidity in September in Dartmouth?
How much does it rain in Dartmouth in September?
When it does not snow in Dartmouth?
What is the sea temperature in September in Dartmouth?
What is the average length of the day in September in Dartmouth?
When are sunrise and sunset in September in Dartmouth?
How long on average sun shines in September in Dartmouth?
What is the UV index intensity in September in Dartmouth?
Average temperature in September
Dartmouth, 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
Dartmouth, 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
Dartmouth, 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
Dartmouth, 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
Dartmouth, 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
Dartmouth, 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
Dartmouth, 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
Dartmouth, 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
Dartmouth, Canada
- Average sea temperature in September: 16.6°C
The best month for swimming (with the highest average sea temperature) is August (17.2°C).
The coldest month (with the lowest average sea temperature) is February (0.8°C).
Average daylight in September /
Average sunshine in September
Dartmouth, Canada
- Average daylight in September: 12h and 3min
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 2min
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
Dartmouth, 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
Dartmouth, 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
Dartmouth, 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
Dartmouth, 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).
Dartmouth, Canada
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