September weather forecast and climate
Belleville, Canada

The first month of the autumn, September, is still a pleasant month in Belleville, Canada, with average temperature ranging between min 13°C (55.4°F) and max 21°C (69.8°F).

Temperature

In September, the average high-temperature marginally drops, from a moderately hot 24.7°C (76.5°F) in August, to a pleasant 21°C (69.8°F). In September, the average low-temperature is 13°C (55.4°F).

Humidity

April, May, July through September, with an average relative humidity of 75%, are the least humid months in Belleville.

Rainfall

In Belleville, in September, during 13.1 rainfall days, 43mm (1.69") of precipitation is typically accumulated. In Belleville, during the entire year, the rain falls for 145 days and collects up to 595mm (23.43") of precipitation.

Snowfall

In Belleville snow does not fall in May through September.

Daylight

In Belleville, the average length of the day is 12.5h.

Sunshine

The average sunshine in Belleville is 9.6h.

UV index

In Belleville, the average daily maximum UV index is 4. A UV Index estimate of 3 to 5 represents a medium vulnerability from unsafe exposure to the UV radiation for ordinary individuals.
Note: The daily maximum UV index of 4 in September interpret into the following advice:
Take precautions. Light skin individuals may get burned in less than 30 minutes. The solar radiation is most powerful near the mid-day, so the exposure to the direct Sun should be reduced accordingly. Sun-protective clothing, a long-sleeved shirt and pants, a wide-brimmed hat, and UVA and UVB-blocking sunglasses are particularly helpful in blocking UV radiation's harmful effects.

What is the temperature in September in Belleville?

In September, in Belleville, the average high-temperature is 21°C (69.8°F), and the average low-temperature is 13°C (55.4°F).

What are the least humid months in Belleville?

Months with the lowest humidity in Belleville, Canada, are April, May, July through September, with an average relative humidity of 75%.

What is the average humidity in September in Belleville?

In September, the average relative humidity in Belleville, Canada, is 75%.

How much does it rain in Belleville in September?

In Belleville, during September, the rain falls for 13.1 days and regularly aggregates up to 43mm (1.69") of precipitation.

Does it snow in Belleville in September?

In Belleville, Canada, in September, it doesn't snow. In October, it regularly snows.

When it does not snow in Belleville?

In Belleville snow does not fall in May through September.

How many hours of daylight does Belleville have in September?

The average length of the day in September is 12.5h.

How many hours of sunshine does Belleville have in September?

In Belleville, the average sunshine in September is 9.6h.

What is the UV index intensity in September in Belleville?

In September, the average daily maximum UV index in Belleville is 4. A UV Index reading of 3 to 5 represents a moderate vulnerability from the exposure to the Sun's UV radiation.
Average temperature in September - Belleville, Canada
  • Average high temperature in September: 21°C

The warmest month (with the highest average high temperature) is July (25.5°C).
The month with the lowest average high temperature is January (-3°C).

  • Average low temperature in September: 13°C

The month with the highest average low temperature is July (16.8°C).
The coldest month (with the lowest average low temperature) is January (-9°C).

Average humidity in September - Belleville, Canada
  • Average humidity in September: 75%

Months with the highest relative humidity are January and February (85%).
Months with the lowest relative humidity are April, May, July, August and September (75%).

Average rainfall in September - Belleville, Canada
  • Average rainfall in September: 43mm

The wettest month (with the highest rainfall) is October (76mm).
The driest month (with the least rainfall) is February (36mm).

Average rainfall days in September - Belleville, Canada
  • Average rainfall days in September: 13.1 days

The month with the highest number of rainy days is August (16.2 days).
The month with the least rainy days is February (5.8 days).

Average snowfall in September - Belleville, Canada
  • Average snowfall in September: 0mm

The month with the highest snowfall is December (105mm).
Months with the least snowfall are May, June, July, August and September (0mm).

Average snowfall days in September - Belleville, Canada
  • Average snowfall days in September: 0 days

The month with the highest number of snowfall days is January (12.5 days).
Months with the least snowfall days are June, July, August and September (0 days).

Average daylight in September / Average sunshine in September - Belleville, Canada
  • Average daylight in September: 12.5h

The month with the longest days is June (Average daylight: 15.5h).
The month with the shortest days is December (Average daylight: 8.9h).

  • Average sunshine in September: 9.6h

The month with the most sunshine is July (Average sunshine: 10.8h).
The month with the least sunshine is January (Average sunshine: 3.1h).

Average UV index in September - Belleville, Canada
  • Average UV index in September: 4

The month with the highest UV index is July (UV index 6).
Months with the lowest UV index are January and December (UV index 1).