September weather forecastRiondel, Canada
September
Weather in September
September, the first month of the autumn in Riondel, is still a comfortable month, with an average temperature ranging between max 16.6°C (61.9°F) and min 3.2°C (37.8°F).Temperature
Observing a mild shift, the average high-temperature during September reduces from August's agreeable 22.8°C (73°F) to an enjoyable 16.6°C (61.9°F). The nighttime temperature in Riondel shows a significant divergence from the daytime highs, averaging at a cold 3.2°C (37.8°F) in September.Humidity
In September, the average relative humidity is 68%.Rainfall
In September, the rain falls for 11.7 days. Throughout September, 37mm (1.46") of precipitation is accumulated. Throughout the year, there are 149 rainfall days, and 536mm (21.1") of precipitation is accumulated.Snowfall
January through May, September through December are months with snowfall. September is the first month it typically snows in Riondel, Canada. Throughout September, in the average 0.2 snowfall days, it receives 6mm (0.24") of snow. In Riondel, during the entire year, snow falls for 61.3 days and aggregates up to 781mm (30.75") of snow.Daylight
In Riondel, the average length of the day in September is 12h and 35min.On the first day of the month, sunrise is at 7:04 am and sunset at 8:30 pm. On the last day of September, in Riondel, Canada, sunrise is at 7:47 am and sunset at 7:27 pm MDT.
Sunshine
The average sunshine in September is 9.9h.UV index
In Riondel, the average daily maximum UV index in September is 3. A UV Index reading of 3 to 5 represents a moderate threat to health from unsafe exposure to UV radiation for ordinary individuals.Note: In September, the maximum UV index of 3 transforms into these recommendations:
Proceed with care. Light skin individuals may be exposed to burns in fewer than 30 minutes. Limiting sun exposure during midday hours helps in reducing the harmful effects of UV radiation. A wide-brimmed hat is a shield, deflecting up to 50% of harmful UV radiation from eyes. Watch out! The Sun's UV radiation can be nearly magnified twofold due to snow reflection.
Published by: Weather Atlas | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in September
Riondel, Canada
- Average high temperature in September: 16.6°C
The warmest month (with the highest average high temperature) is August (22.8°C).
The month with the lowest average high temperature is December (-4.3°C).
- Average low temperature in September: 3.2°C
The month with the highest average low temperature is August (7.1°C).
The coldest month (with the lowest average low temperature) is December (-12.4°C).
Average pressure in September
Riondel, Canada
- Average pressure in September: 1015.3mbar
The month with the highest atmospheric pressure is January (1022.3mbar).
The month with the lowest atmospheric pressure is June (1013mbar).
Average wind speed in September
Riondel, Canada
- Average wind speed in September: 5.5km/h
The windiest month (with the highest average wind speed) is March (6.2km/h).
The calmest months (with the lowest average wind speed) are August and September (5.5km/h).
Average humidity in September
Riondel, Canada
- Average humidity in September: 68%
The month with the highest relative humidity is January (95%).
The month with the lowest relative humidity is August (57%).
Average rainfall in September
Riondel, Canada
- Average rainfall in September: 37mm
The wettest month (with the highest rainfall) is June (65mm).
The driest month (with the least rainfall) is August (18mm).
Average rainfall days in September
Riondel, Canada
- Average rainfall days in September: 11.7 days
The month with the highest number of rainy days is April (19.8 days).
The month with the least rainy days is December (7 days).
Average snowfall in September
Riondel, Canada
- Average snowfall in September: 6mm
The month with the highest snowfall is December (194mm).
The months with the least snowfall are June, July and August (0mm).
Average snowfall days in September
Riondel, Canada
- Average snowfall days in September: 0.2 days
The month with the highest number of snowfall days is December (14.7 days).
The months with the least snowfall days are June, July and August (0 days).
Average daylight in September /
Average sunshine in September
Riondel, Canada
- Average daylight in September: 12h and 36min
The month with the longest days is June (Average daylight: 16h and 18min).
The month with the shortest days is December (Average daylight: 8h and 12min).
- Average sunshine in September: 9h and 54min
The month with the most sunshine is August (Average sunshine: 12h and 0min).
The month with the least sunshine is January (Average sunshine: 3h and 42min).
Average sunshine days in September
Riondel, Canada
- Average sunshine days in September: 16 days
The month with the most sunshine days is August (20.7 days).
The month with the least sunshine days is April (7.8 days).
Average UV index in September
Riondel, Canada
- Average UV index in September: 3
The month with the highest UV index is July (UV index 5).
The months with the lowest UV index are January, February, March, October, November and December (UV index 1).
Average cloud cover in September
Riondel, Canada
- Average cloud cover in September: 29
The month with the most cloud cover is January (Cloud cover 62).
The month with the least cloud cover is August (Cloud cover 17).
Average visibility in September
Riondel, Canada
- Average visibility in September: 9km
The month with the highest visibility is August (10km).
The month with the lowest visibility is January (3km).
