September weather forecastMount Mercer, Australia
September
Weather in September
The first month of the spring, September, is a refreshing month in Mount Mercer, Australia, with temperature in the range of an average high of 13.9°C (57°F) and an average low of 4.3°C (39.7°F).Temperature
As September sets, the average high-temperature shows a slight increase, moving up from a fresh 10.9°C (51.6°F) in August to a moderate 13.9°C (57°F). Throughout the nights in September, an average low-temperature of 4.3°C (39.7°F) is noted in Mount Mercer.Humidity
The average relative humidity in September is 81%.Rainfall
In Mount Mercer, in September, during 14.9 rainfall days, 34mm (1.34") of precipitation is typically accumulated. Throughout the year, in Mount Mercer, there are 149.7 rainfall days, and 390mm (15.35") of precipitation is accumulated.Snowfall
May, July through October are months with snowfall. In Mount Mercer, in September, during 0.3 snowfall days, 1mm (0.04") of snow is typically accumulated. In Mount Mercer, during the entire year, snow falls for 2.9 days and aggregates up to 41mm (1.61") of snow.Daylight
In September, the average length of the day is 11h and 51min.On the first day of September in Mount Mercer, sunrise is at 6:45 am and sunset at 6:03 pm. On the last day of the month, sunrise is at 6:00 am and sunset at 6:27 pm AEST.
Sunshine
In September, the average sunshine is 6.2h.UV index
In September, the average daily maximum UV index in Mount Mercer is 3. A UV Index value of 3 to 5 symbolizes a moderate threat to health from exposure to the Sun's UV rays for average individuals.Note: A maximum daily UV index of 3 during September morphs into the following directions:
Take precautions - Protection against sun damage is advised. To prevent harmful UV exposure, minimize direct contact with the Sun around midday. To mitigate harm from sun exposure, pick sunglasses offering UVA and UVB defense. Notice! The UV radiation of the Sun can be intensified nearly twofold due to the reflective quality of snow.
Published by: Weather Atlas | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in September
Mount Mercer, Australia
- Average high temperature in September: 13.9°C
The warmest month (with the highest average high temperature) is January (26.7°C).
The month with the lowest average high temperature is July (10.1°C).
- Average low temperature in September: 4.3°C
The month with the highest average low temperature is February (12.5°C).
The coldest month (with the lowest average low temperature) is August (3.5°C).
Average pressure in September
Mount Mercer, Australia
- Average pressure in September: 1016.7mbar
The month with the highest atmospheric pressure is June (1021.5mbar).
The month with the lowest atmospheric pressure is January (1012.3mbar).
Average wind speed in September
Mount Mercer, Australia
- Average wind speed in September: 11.1km/h
The windiest month (with the highest average wind speed) is August (11.7km/h).
The calmest month (with the lowest average wind speed) is April (9.1km/h).
Average humidity in September
Mount Mercer, Australia
- Average humidity in September: 81%
The months with the highest relative humidity are June and July (88%).
The month with the lowest relative humidity is January (60%).
Average rainfall in September
Mount Mercer, Australia
- Average rainfall in September: 34mm
The wettest month (with the highest rainfall) is August (41mm).
The driest month (with the least rainfall) is March (24mm).
Average rainfall days in September
Mount Mercer, Australia
- Average rainfall days in September: 14.9 days
The month with the highest number of rainy days is August (16.7 days).
The month with the least rainy days is January (8.9 days).
Average snowfall in September
Mount Mercer, Australia
- Average snowfall in September: 1mm
The month with the highest snowfall is August (31mm).
The months with the least snowfall are January, February, March, April, June, November and December (0mm).
Average snowfall days in September
Mount Mercer, Australia
- Average snowfall days in September: 0.3 days
The month with the highest number of snowfall days is August (1.5 days).
The months with the least snowfall days are January, February, March, April and December (0 days).
Average daylight in September /
Average sunshine in September
Mount Mercer, Australia
- Average daylight in September: 11h and 48min
The month with the longest days is December (Average daylight: 14h and 42min).
The month with the shortest days is June (Average daylight: 9h and 36min).
- Average sunshine in September: 6h and 12min
The month with the most sunshine is December (Average sunshine: 9h and 0min).
The month with the least sunshine is July (Average sunshine: 4h and 42min).
Average sunshine days in September
Mount Mercer, Australia
- Average sunshine days in September: 11.9 days
The month with the most sunshine days is January (20.3 days).
The month with the least sunshine days is August (10.7 days).
Average UV index in September
Mount Mercer, Australia
- Average UV index in September: 3
The month with the highest UV index is December (UV index 6).
The months with the lowest UV index are June and July (UV index 2).
Average cloud cover in September
Mount Mercer, Australia
- Average cloud cover in September: 61
The month with the most cloud cover is June (Cloud cover 69).
The month with the least cloud cover is January (Cloud cover 32).
Average visibility in September
Mount Mercer, Australia
- Average visibility in September: 7km
The months with the highest visibility are January, February and December (9km).
The month with the lowest visibility is June (6km).
