September weather forecastBlue Mountain, Australia
September
Weather in September
The first month of the spring, September, is a warm month in Blue Mountain, Australia, with an average temperature varying between 18.8°C (65.8°F) and 23.7°C (74.7°F).Temperature
An average high-temperature of a warm 23.7°C (74.7°F) marks September, exhibiting a close resemblance to the conditions in August. Nighttime temperature in Blue Mountain sees a small decrement from daytime highs, dipping to an average of 18.8°C (65.8°F) during September.Humidity
In September, the average relative humidity in Blue Mountain is 75%.Rainfall
September is the month with the least rainfall. Rain falls for 6.2 days and accumulates 9mm (0.35") of precipitation.Daylight
In Blue Mountain, Australia, the average length of the day in September is 11h and 58min.On the first day of September, sunrise is at 6:13 am and sunset at 5:54 pm. On the last day of the month, sunrise is at 5:45 am and sunset at 6:02 pm AEST.
Sunshine
The average sunshine in September is 8.1h.UV index
The average daily maximum UV index in September in Blue Mountain is 6. A UV Index value of 6 to 7 symbolizes a high health hazard from exposure to the Sun's UV radiation for average individuals.Note: The daily high UV index of 6 in September translates into this advice:
Stick with precautions and abide by sun safety procedures. Evading sunburn is essential. Try to minimize direct Sun exposure between 10 a.m. and 4 p.m., the peak period for UV radiation. Also note that objects like parasols or canopies might not provide complete sun protection. Limit sun-induced ocular harm with sunglasses that feature UVA and UVB filtration.
Published by: Weather Atlas | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in September
Blue Mountain, Australia
- Average high temperature in September: 23.7°C
The warmest month (with the highest average high temperature) is February (28.5°C).
The month with the lowest average high temperature is July (20.8°C).
- Average low temperature in September: 18.8°C
The months with the highest average low temperature are January and February (24.8°C).
The coldest month (with the lowest average low temperature) is July (16.7°C).
Average pressure in September
Blue Mountain, Australia
- Average pressure in September: 1017.3mbar
The month with the highest atmospheric pressure is July (1019mbar).
The month with the lowest atmospheric pressure is January (1008.7mbar).
Average wind speed in September
Blue Mountain, Australia
- Average wind speed in September: 14.3km/h
The windiest month (with the highest average wind speed) is March (19.3km/h).
The calmest month (with the lowest average wind speed) is August (14km/h).
Average humidity in September
Blue Mountain, Australia
- Average humidity in September: 75%
The month with the highest relative humidity is March (80%).
The month with the lowest relative humidity is August (74%).
Average rainfall in September
Blue Mountain, Australia
- Average rainfall in September: 9mm
The wettest month (with the highest rainfall) is March (175mm).
The driest month (with the least rainfall) is September (9mm).
Average rainfall days in September
Blue Mountain, Australia
- Average rainfall days in September: 6.2 days
The month with the highest number of rainy days is March (21.8 days).
The month with the least rainy days is August (5.8 days).
Average daylight in September /
Average sunshine in September
Blue Mountain, Australia
- Average daylight in September: 12h and 0min
The month with the longest days is December (Average daylight: 13h and 24min).
The month with the shortest days is June (Average daylight: 10h and 48min).
- Average sunshine in September: 8h and 6min
The month with the most sunshine is October (Average sunshine: 10h and 30min).
The months with the least sunshine are April, May and June (Average sunshine: 6h and 12min).
Average sunshine days in September
Blue Mountain, Australia
- Average sunshine days in September: 19.5 days
The month with the most sunshine days is August (21.3 days).
The month with the least sunshine days is March (7.1 days).
Average UV index in September
Blue Mountain, Australia
- Average UV index in September: 6
The months with the highest UV index are February, November and December (UV index 7).
The months with the lowest UV index are May, June, July and August (UV index 5).
Average cloud cover in September
Blue Mountain, Australia
- Average cloud cover in September: 24
The month with the most cloud cover is March (Cloud cover 49).
The month with the least cloud cover is August (Cloud cover 20).
Average visibility in September
Blue Mountain, Australia
- Average visibility in September: 10km
The months with the highest visibility are January, February, March, April, May, June, July, August, September, October, November and December (10km).
The months with the lowest visibility are January, February, March, April, May, June, July, August, September, October, November and December (10km).
