Brockville
Canada
Long-term weather forecast
Long-term weather forecast

September weather forecast and climate
Brockville, Canada

September, the first month of the autumn, in Brockville, is still a pleasant month, with average temperature ranging between min 10.7°C (51.3°F) and max 20.7°C (69.3°F).

Temperature

In September, the average high-temperature slightly decreases, from a warm 24.4°C (75.9°F) in August, to a pleasant 20.7°C (69.3°F). In September, in Brockville, the average low-temperature is 10.7°C (51.3°F).

Humidity

In September, the average relative humidity is 79%.

Rainfall

In Brockville, in September, it is raining for 11.7 days, with typically 45mm (1.77") of accumulated precipitation. In Brockville, Canada, during the entire year, the rain falls for 141.7 days and collects up to 669mm (26.34") of precipitation.

Snowfall

In Brockville snow does not fall in June through September.

Daylight

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

Sunshine

In September, the average sunshine in Brockville is 9.1h.

UV index

In Brockville, Canada, the average daily maximum UV index is 3. A UV Index reading of 3 to 5 represents a moderate health risk from the exposure to the Sun's UV rays for ordinary individuals.
Note: The daily maximum UV index of 3 in September interpret into the following advice:
Take precautions - Protection against sun damage is advised. The Sun's most intense and consequently most harmful UV radiation during midday hours should be decreased by minimizing exposure and seeking shade. 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 Brockville?

In Brockville, Canada, in September, the average high-temperature is 20.7°C (69.3°F), and the average low-temperature is 10.7°C (51.3°F).

What is the average humidity in September in Brockville?

In September, the average relative humidity in Brockville, Canada, is 79%.

How many days does it rain in September in Brockville?

In Brockville, during September, the rain falls for 11.7 days and regularly aggregates up to 45mm (1.77") of precipitation.

Does it snow in Brockville in September?

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

When it does not snow in Brockville?

June through September are months without snowfall in Brockville.

How many hours of daylight does Brockville have in September?

In Brockville, the average length of the day in September is 12.5h.

How long on average sun shines in September in Brockville?

In September, the average sunshine is 9.1h.

How high is the UV index in September in Brockville?

In September, the average daily maximum UV index in Brockville, Canada, is 3. A UV Index reading of 3 to 5 represents a medium health risk from the exposure to the Sun's UV radiation.
Average temperature in September - Brockville, Canada
  • Average high temperature in September: 20.7°C

The warmest month (with the highest average high temperature) is July (25.1°C).
The month with the lowest average high temperature is January (-4.4°C).

  • Average low temperature in September: 10.7°C

The month with the highest average low temperature is July (15.3°C).
The coldest month (with the lowest average low temperature) is January (-11.8°C).

Average humidity in September - Brockville, Canada
  • Average humidity in September: 79%

Months with the highest relative humidity are January and February (89%).
The month with the lowest relative humidity is April (77%).

Average rainfall in September - Brockville, Canada
  • Average rainfall in September: 45mm

The wettest month (with the highest rainfall) is August (70mm).
Driest months (with the lowest rainfall) are March and November (43mm).

Average rainfall days in September - Brockville, Canada
  • Average rainfall days in September: 11.7 days

The month with the highest number of rainy days is July (17.1 days).
The month with the lowest number of rainy days is January (5 days).

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

The month with the highest snowfall is February (157mm).
Months with the lowest snowfall are June, July, August and September (0mm).

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

Months with the highest number of snowfall days are January and February (13.3 days).
Months with the lowest number of snowfall days are June, July, August and September (0 days).

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

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

  • Average sunshine in September: 9.1h

Months with most sunshine are July and August (Average sunshine: 10.1h).
The month with least sunshine is February (Average sunshine: 2.7h).

Average UV index in September - Brockville, Canada
  • Average UV index in September: 3

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).