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
The average high-temperature is a still warm 27°C (80.6°F) in September, hardly different from the 25.7°C (78.3°F) recorded in August. Nighttime temperatures consistently average an agreeable 20.4°C (68.7°F) during September.Heat index
Throughout September, the heat index is calculated to be 27°C (80.6°F). Constant activity during exposure could result in a state of weariness and possibly heat cramps.Take into consideration that the heat index values are calculated for shade and light wind conditions. Exposure to direct sunshine can increase heat index values by up to 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'felt air temperature' or 'apparent temperature', reflects the blend of air temperature and relative humidity to give a temperature impression. Physical activity, clothing, and metabolic variations are additional factors that impact an individual's perception of temperature. Keep it in mind, direct sunlight can augment the heat you experience, possibly pushing the heat index up by 15 Fahrenheit (8 Celsius) degrees. Heat index values are highly critical for babies and toddlers. Typically, children face more danger than adults as they usually perspire less. Their larger skin surface relative to their small bodies and increased heat output from their activities enhance their risk.
Humidity
In September, the average relative humidity is 51%.Rainfall
September and October are months with the least rain in Onslow when the rain falls for 0.7 days and typically aggregates up to 1mm (0.04") of rain.Daylight
In September, the average length of the day in Onslow is 11h and 58min.On the first day of the month, sunrise is at 6:28 am and sunset at 6:10 pm. On the last day of September, sunrise is at 6:01 am and sunset at 6:17 pm AWST.
Sunshine
In Onslow, the average sunshine in September is 9.9h.UV index
May through September, with an average maximum UV index of 6, are months with the lowest UV index in Onslow, Australia. A UV Index reading of 6 to 7 represents a high health risk from unsafe exposure to UV radiation for the ordinary person.Note: A maximum high daily UV index of 6 during September translates into the following directions:
Persist in precautions and follow sun safety policies. Keeping sunburn at bay is imperative. The Sun emits the most powerful UV radiation between 10 a.m. and 4 p.m. Try to avoid direct sunlight during this period. Shield yourself from the harmful effects of UV radiation with sun-protective attire, a hat, and quality sunglasses.
Frequently asked questions
What is the average September temperature in Onslow?
What is the average humidity in September in Onslow?
What is the driest month in Onslow?
How many days does it rain in September in Onslow?
How many hours of daylight does Onslow have in September?
When are sunrise and sunset in September in Onslow?
How long on average sun shines in September in Onslow?
When is the lowest UV index in Onslow?
How high is the UV index in September in Onslow?
Average temperature in September
Onslow, Australia
- Average high temperature in September: 27°C
The warmest month (with the highest average high temperature) is March (33.7°C).
The month with the lowest average high temperature is July (24.8°C).
- Average low temperature in September: 20.4°C
The month with the highest average low temperature is March (28.4°C).
The coldest month (with the lowest average low temperature) is July (19.4°C).
Average pressure in September
Onslow, Australia
- Average pressure in September: 1015.2mbar
The month with the highest atmospheric pressure is July (1017.4mbar).
The month with the lowest atmospheric pressure is January (1005.2mbar).
Average wind speed in September
Onslow, Australia
- Average wind speed in September: 21km/h
The windiest month (with the highest average wind speed) is November (23.2km/h).
The calmest month (with the lowest average wind speed) is April (16.9km/h).
Average humidity in September
Onslow, Australia
- Average humidity in September: 51%
The month with the highest relative humidity is January (61%).
The months with the lowest relative humidity are May and July (49%).
Average rainfall in September
Onslow, Australia
- Average rainfall in September: 1mm
The wettest month (with the highest rainfall) is January (28mm).
The driest months (with the least rainfall) are September and October (1mm).
Average rainfall days in September
Onslow, Australia
- Average rainfall days in September: 0.7 days
The month with the highest number of rainy days is January (9.1 days).
The months with the least rainy days are September and November (0.7 days).
Average daylight in September /
Average sunshine in September
Onslow, 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: 9h and 5min
The month with the most sunshine is November (Average sunshine: 12h and 6min).
The month with the least sunshine is June (Average sunshine: 7h and 6min).
Average sunshine days in September
Onslow, Australia
- Average sunshine days in September: 29.2 days
The month with the most sunshine days is October (29.6 days).
The month with the least sunshine days is January (20.1 days).
Average UV index in September
Onslow, Australia
- Average UV index in September: 6
The month with the highest UV index is February (UV index 8).
The months with the lowest UV index are May, June, July, August and September (UV index 6).
Average cloud cover in September
Onslow, Australia
- Average cloud cover in September: 4
The months with the most cloud cover are January and June (Cloud cover 18).
The month with the least cloud cover is September (Cloud cover 4).
Average visibility in September
Onslow, 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).
Onslow, Australia
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