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 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
Weather in September
Temperature
A soft shift in the average high-temperature is noticeable in September, transitioning from a refreshing 18.3°C (64.9°F) in August to an agreeable 21.6°C (70.9°F). An average low-temperature of 10.6°C (51.1°F) is noted during the nights in September in Castle Hill.Humidity
With an average relative humidity of 65%, September is the least humid month.Rainfall
In Castle Hill, Australia, in September, during 9.1 rainfall days, 29mm (1.14") of precipitation is typically accumulated. Throughout the year, there are 149.1 rainfall days, and 546mm (21.5") of precipitation is accumulated.Daylight
In Castle Hill, the average length of the day in September is 11h and 53min.On the first day of the month, sunrise is at 6:13 am and sunset at 5:38 pm. On the last day of September, in Castle Hill, Australia, sunrise is at 5:33 am and sunset at 5:57 pm AEST.
Sunshine
In Castle Hill, Australia, the average sunshine in September is 8.6h.UV index
The months with the lowest UV index in Castle Hill are May through September, with an average maximum UV index of 4. A UV Index estimate of 3 to 5 represents a moderate health risk from exposure to the Sun's UV rays for ordinary individuals.Note: In September, the maximum UV index of 4 suggests this advice:
Undertake precautions - Obligation exists to protect against skin and eye damage. Midday Sun has the strongest UV rays, making it crucial to limit exposure and find shade. To mitigate harm from sun exposure, pick sunglasses offering UVA and UVB defense.
Frequently asked questions
What are September temperatures in Castle Hill?
What is the least humid month in Castle Hill?
What is the average humidity in September in Castle Hill?
How much does it rain in Castle Hill in September?
What is the average length of the day in September in Castle Hill?
When is the sunrise / sunset in September in Castle Hill?
How many hours of sunshine does Castle Hill have in September?
What is the month with the lowest UV index in Castle Hill?
What is the UV index reading in September in Castle Hill?
Average temperature in September
Castle Hill, Australia
- Average high temperature in September: 21.6°C
The warmest month (with the highest average high temperature) is January (29.2°C).
The month with the lowest average high temperature is June (16.8°C).
- Average low temperature in September: 10.6°C
The month with the highest average low temperature is January (18.8°C).
The coldest month (with the lowest average low temperature) is July (8.1°C).
Average pressure in September
Castle Hill, 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
Castle Hill, Australia
- Average wind speed in September: 10.1km/h
The windiest month (with the highest average wind speed) is December (10.2km/h).
The calmest month (with the lowest average wind speed) is April (8.8km/h).
Average humidity in September
Castle Hill, Australia
- Average humidity in September: 65%
The month with the highest relative humidity is June (76%).
The month with the lowest relative humidity is September (65%).
Average rainfall in September
Castle Hill, Australia
- Average rainfall in September: 29mm
The wettest month (with the highest rainfall) is February (87mm).
The driest month (with the least rainfall) is May (27mm).
Average rainfall days in September
Castle Hill, Australia
- Average rainfall days in September: 9.1 days
The month with the highest number of rainy days is March (17.6 days).
The month with the least rainy days is August (7.9 days).
Average daylight in September /
Average sunshine in September
Castle Hill, Australia
- Average daylight in September: 11h and 5min
The month with the longest days is December (Average daylight: 14h and 24min).
The month with the shortest days is June (Average daylight: 10h and 0min).
- Average sunshine in September: 8h and 4min
The months with the most sunshine are November and December (Average sunshine: 9h and 24min).
The month with the least sunshine is June (Average sunshine: 5h and 48min).
Average sunshine days in September
Castle Hill, Australia
- Average sunshine days in September: 19.5 days
The month with the most sunshine days is August (21 days).
The month with the least sunshine days is February (10.4 days).
Average UV index in September
Castle Hill, 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
Castle Hill, Australia
- Average cloud cover in September: 28
The month with the most cloud cover is February (Cloud cover 46).
The month with the least cloud cover is August (Cloud cover 25).
Average visibility in September
Castle Hill, Australia
- Average visibility in September: 9km
The months with the highest visibility are January, February, March, April, May, June, July, August, September, October, November and December (9km).
The months with the lowest visibility are January, February, March, April, May, June, July, August, September, October, November and December (9km).
Castle Hill, Australia
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