September weather forecastGrimsby, Canada
September
Weather in September
The first month of the autumn, September, is also an agreeable month in Grimsby, Canada, with an average temperature fluctuating between 13.7°C (56.7°F) and 21.4°C (70.5°F).Temperature
Grimsby's progression into September involves a gentle drop in the average high-temperature, from a moderately hot 24.7°C (76.5°F) in August to an agreeable 21.4°C (70.5°F). The average low-temperature in Grimsby, Canada, during September nights is a refreshing 13.7°C (56.7°F).Humidity
The average relative humidity in September is 76%.Rainfall
The month with the least rainfall is September, when the rain falls for 14.1 days and typically collects 44mm (1.73") of precipitation.Snowfall
June through October are months without snowfall.Daylight
The average length of the day in September is 12h and 29min.On the first day of the month, sunrise is at 6:43 am and sunset at 7:52 pm. On the last day of September, in Grimsby, Canada, sunrise is at 7:15 am and sunset at 7:00 pm EDT.
Sunshine
In September, the average sunshine in Grimsby is 9.3h.UV index
The average daily maximum UV index in September in Grimsby, Canada, is 4. A UV Index value of 3 to 5 symbolizes a moderate threat to health from unprotected exposure to Sun's UV rays for ordinary individuals.Note: A maximum high daily UV index of 4 during September translates into the following directions:
Take precautions - Protection against skin and eye damage is obliged. The best time to avoid the Sun's harmful UV radiation is during midday when it's most potent. For excellent sun protection for the eyes, ears, face, and neck, consider a wide-brim hat.
Published by: Weather Atlas | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in September
Grimsby, Canada
- Average high temperature in September: 21.4°C
The warmest month (with the highest average high temperature) is July (25.4°C).
The month with the lowest average high temperature is January (-2.3°C).
- Average low temperature in September: 13.7°C
The month with the highest average low temperature is July (17.3°C).
The coldest month (with the lowest average low temperature) is January (-7.3°C).
Average pressure in September
Grimsby, Canada
- Average pressure in September: 1017.1mbar
The months with the highest atmospheric pressure are March and November (1018.5mbar).
The month with the lowest atmospheric pressure is June (1013.3mbar).
Average wind speed in September
Grimsby, Canada
- Average wind speed in September: 12.7km/h
The windiest month (with the highest average wind speed) is January (19km/h).
The calmest month (with the lowest average wind speed) is July (11.3km/h).
Average humidity in September
Grimsby, Canada
- Average humidity in September: 76%
The month with the highest relative humidity is February (85%).
The month with the lowest relative humidity is April (75%).
Average rainfall in September
Grimsby, Canada
- Average rainfall in September: 44mm
The wettest month (with the highest rainfall) is July (74mm).
The driest month (with the least rainfall) is September (44mm).
Average rainfall days in September
Grimsby, Canada
- Average rainfall days in September: 14.1 days
The month with the highest number of rainy days is July (19.2 days).
The month with the least rainy days is February (9.3 days).
Average snowfall in September
Grimsby, Canada
- Average snowfall in September: 0mm
The month with the highest snowfall is February (137mm).
The months with the least snowfall are June, July, August, September and October (0mm).
Average snowfall days in September
Grimsby, Canada
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is January (14.8 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight in September /
Average sunshine in September
Grimsby, Canada
- Average daylight in September: 12h and 30min
The month with the longest days is June (Average daylight: 15h and 18min).
The month with the shortest days is December (Average daylight: 9h and 0min).
- Average sunshine in September: 9h and 18min
The month with the most sunshine is July (Average sunshine: 10h and 36min).
The month with the least sunshine is January (Average sunshine: 3h and 12min).
Average sunshine days in September
Grimsby, Canada
- Average sunshine days in September: 13.8 days
The month with the most sunshine days is September (13.8 days).
The month with the least sunshine days is February (9 days).
Average UV index in September
Grimsby, Canada
- Average UV index in September: 4
The month with the highest UV index is July (UV index 6).
The month with the lowest UV index is December (UV index 1).
Average cloud cover in September
Grimsby, Canada
- Average cloud cover in September: 30
The month with the most cloud cover is January (Cloud cover 66).
The month with the least cloud cover is August (Cloud cover 27).
Average visibility in September
Grimsby, Canada
- Average visibility in September: 9km
The month with the highest visibility is August (10km).
The month with the lowest visibility is January (8km).
