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 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
September
Weather in September
Temperature
A modest decline in the average high-temperature is seen in Richmond Hill during September, decreasing from a warm 24.3°C (75.7°F) in August to a pleasant 20.7°C (69.3°F). In Richmond Hill, September's nights observe an average temperature dip to a fresh 12.9°C (55.2°F).Humidity
The average relative humidity in September in Richmond Hill is 77%.Rainfall
In September, the rain falls for 14.4 days. Throughout September, 46mm (1.81") of precipitation is accumulated. In Richmond Hill, Canada, during the entire year, the rain falls for 161.4 days and collects up to 696mm (27.4") of precipitation.Snowfall
In Richmond Hill, snow does not fall in June through September.Daylight
In September, the average length of the day is 12h and 29min.On the first day of September in Richmond Hill, Canada, sunrise is at 6:42 am and sunset at 7:53 pm. On the last day of the month, sunrise is at 7:15 am and sunset at 6:59 pm EDT.
Sunshine
The average sunshine in September is 9.3h.UV index
In Richmond Hill, the average daily maximum UV index in September is 4. A UV Index reading of 3 to 5 represents a moderate health risk from exposure to the Sun's UV rays for the ordinary person.Note: In September, the maximum UV index of 4 suggests this advice:
Make use of precautions - Suggestions to resist sunburn are communicated. The Sun's radiation is especially intense around midday; try to stay in shade during this period. Protect your eyes, ears, face, and neck from the Sun by wearing a wide-brimmed hat.
Published by: Weather Atlas | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What is the average September temperature in Richmond Hill?
What is the average humidity in September in Richmond Hill?
How many days does it rain in September in Richmond Hill?
When it does not snow in Richmond Hill?
Does it snow in Richmond Hill in September?
What is the average length of the day in September in Richmond Hill?
When is the sunrise / sunset in September in Richmond Hill?
How long on average sun shines in September in Richmond Hill?
What is the UV index reading in September in Richmond Hill?
Average temperature in September
Richmond Hill, Canada
- Average high temperature in September: 20.7°C
The warmest month (with the highest average high temperature) is July (24.9°C).
The month with the lowest average high temperature is January (-3.3°C).
- Average low temperature in September: 12.9°C
The month with the highest average low temperature is July (16.6°C).
The coldest month (with the lowest average low temperature) is January (-8.8°C).
Average pressure in September
Richmond Hill, Canada
- Average pressure in September: 1016.9mbar
The month with the highest atmospheric pressure is March (1018.3mbar).
The month with the lowest atmospheric pressure is June (1013.1mbar).
Average wind speed in September
Richmond Hill, Canada
- Average wind speed in September: 12km/h
The windiest month (with the highest average wind speed) is January (17.1km/h).
The calmest month (with the lowest average wind speed) is July (10.7km/h).
Average humidity in September
Richmond Hill, Canada
- Average humidity in September: 77%
The months with the highest relative humidity are January and February (86%).
The month with the lowest relative humidity is April (75%).
Average rainfall in September
Richmond Hill, Canada
- Average rainfall in September: 46mm
The wettest month (with the highest rainfall) is October (72mm).
The driest month (with the least rainfall) is February (41mm).
Average rainfall days in September
Richmond Hill, Canada
- Average rainfall days in September: 14.4 days
The month with the highest number of rainy days is August (17.8 days).
The month with the least rainy days is February (6.9 days).
Average snowfall in September
Richmond Hill, Canada
- Average snowfall in September: 0mm
The month with the highest snowfall is February (163mm).
The months with the least snowfall are June, July, August and September (0mm).
Average snowfall days in September
Richmond Hill, Canada
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is February (16.6 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight in September /
Average sunshine in September
Richmond Hill, Canada
- Average daylight in September: 12h and 3min
The month with the longest days is June (Average daylight: 15h and 24min).
The month with the shortest days is December (Average daylight: 9h and 0min).
- Average sunshine in September: 9h and 2min
The month with the most sunshine is July (Average sunshine: 10h and 42min).
The month with the least sunshine is January (Average sunshine: 2h and 54min).
Average sunshine days in September
Richmond Hill, Canada
- Average sunshine days in September: 14.5 days
The month with the most sunshine days is September (14.5 days).
The month with the least sunshine days is February (9.8 days).
Average UV index in September
Richmond Hill, Canada
- Average UV index in September: 4
The month with the highest UV index is July (UV index 6).
The months with the lowest UV index are January and December (UV index 1).
Average cloud cover in September
Richmond Hill, Canada
- Average cloud cover in September: 31
The month with the most cloud cover is January (Cloud cover 69).
The month with the least cloud cover is July (Cloud cover 28).
Average visibility in September
Richmond Hill, Canada
- Average visibility in September: 9km
The months with the highest visibility are February, March, April, May, June, July, August, September, October, November and December (9km).
The month with the lowest visibility is January (8km).
