September weather forecastHornsby, Australia
September
Weather in September
September, the first month of the spring in Hornsby, is an agreeable month, with an average temperature ranging between min 11.4°C (52.5°F) and max 21°C (69.8°F).Temperature
The initiation of September records an average high-temperature of a pleasant 21°C (69.8°F), displaying a near consistency with the previous month. An average low-temperature of 11.4°C (52.5°F) is noted in Hornsby during the month of September.Humidity
The months with the lowest humidity are August and September, with an average relative humidity of 66%.Rainfall
July and September are months with the least rain in Hornsby when the rain falls for 9 days and typically aggregates up to 30mm (1.18") of rain.Daylight
The average length of the day in September is 11h and 53min.On the first day of September in Hornsby, Australia, sunrise is at 6:13 am and sunset at 5:37 pm. On the last day of the month, sunrise is at 5:33 am and sunset at 5:57 pm AEST.
Sunshine
The average sunshine in September in Hornsby is 8.7h.UV index
May through September, with an average maximum UV index of 4, are months with the lowest UV index. A UV Index estimate of 3 to 5 represents a moderate health risk from exposure to the Sun's UV radiation for ordinary individuals.Note: In September, a daily UV index of 4 turns into the following recommendations:
Prioritize safety - Suggestions to prevent sun damage are offered. Avoiding direct sunlight during midday hours helps reduce the risk from intense UV radiation. Enhance your sun protection with tightly woven, yet airy clothing.
Published by: Weather Atlas | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in September
Hornsby, Australia
- Average high temperature in September: 21°C
The warmest month (with the highest average high temperature) is January (28.2°C).
The month with the lowest average high temperature is July (16.7°C).
- Average low temperature in September: 11.4°C
The month with the highest average low temperature is January (19.3°C).
The coldest month (with the lowest average low temperature) is July (8.9°C).
Average pressure in September
Hornsby, Australia
- Average pressure in September: 1017.2mbar
The month with the highest atmospheric pressure is June (1021mbar).
The month with the lowest atmospheric pressure is January (1012.9mbar).
Average wind speed in September
Hornsby, Australia
- Average wind speed in September: 12.1km/h
The windiest months (with the highest average wind speed) are January, August, September and December (12.1km/h).
The calmest month (with the lowest average wind speed) is April (10.6km/h).
Average humidity in September
Hornsby, Australia
- Average humidity in September: 66%
The month with the highest relative humidity is June (75%).
The months with the lowest relative humidity are August and September (66%).
Average rainfall in September
Hornsby, Australia
- Average rainfall in September: 30mm
The wettest month (with the highest rainfall) is February (89mm).
The driest months (with the least rainfall) are July and September (30mm).
Average rainfall days in September
Hornsby, Australia
- Average rainfall days in September: 9 days
The month with the highest number of rainy days is January (16.3 days).
The month with the least rainy days is May (8.5 days).
Average daylight in September /
Average sunshine in September
Hornsby, Australia
- Average daylight in September: 11h and 54min
The month with the longest days is December (Average daylight: 14h and 18min).
The month with the shortest days is June (Average daylight: 10h and 0min).
- Average sunshine in September: 8h and 42min
The month with the most sunshine is November (Average sunshine: 9h and 42min).
The month with the least sunshine is June (Average sunshine: 5h and 54min).
Average sunshine days in September
Hornsby, Australia
- Average sunshine days in September: 19.5 days
The month with the most sunshine days is August (19.8 days).
The month with the least sunshine days is February (10.6 days).
Average UV index in September
Hornsby, Australia
- Average UV index in September: 4
The months with the highest UV index are January, February, November and December (UV index 6).
The months with the lowest UV index are May, June, July, August and September (UV index 4).
Average cloud cover in September
Hornsby, Australia
- Average cloud cover in September: 26
The month with the most cloud cover is February (Cloud cover 43).
The month with the least cloud cover is August (Cloud cover 24).
Average visibility in September
Hornsby, Australia
- Average visibility in September: 10km
The months with the highest visibility are February, March, April, May, June, July, August, September and October (10km).
The months with the lowest visibility are January, November and December (9km).
