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 snowfall in September
- Average snowfall 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
During September, the average high-temperature is a moderate 13.2°C (55.8°F), maintaining a close resemblance to that of the preceding month. Rolleston reports an average nighttime low-temperature of 4.5°C (40.1°F) in September.Humidity
The average relative humidity in September is 78%.Rainfall
September is the month with the least rainfall. Rain falls for 8.2 days and accumulates 14mm (0.55") of precipitation.Snowfall
June through September are months with snowfall. September is the last month it regularly snows. During 0.1 snowfall days, in September, Rolleston aggregates 3mm (0.12") of snow. Throughout the year, there are 1 snowfall days, and 13mm (0.51") of snow is accumulated.Daylight
In Rolleston, New Zealand, the average length of the day in September is 11h and 47min.On the first day of September, sunrise is at 6:57 am and sunset at 6:03 pm NZST. On the last day of the month, sunrise is at 7:04 am and sunset at 7:36 pm NZDT.
Note: On Sunday, 29. September 2024, at 2:00 am, Daylight Saving Time starts, and the time zone changes from NZST to NZDT. Daylight Saving Time lasts until Sunday, 06. April 2025, at 3:00 am; consequently, the time zone reverts from NZDT to NZST.
Sunshine
In September, the average sunshine in Rolleston is 7.6h.UV index
The months with the lowest UV index in Rolleston are April through September, with an average maximum UV index of 3. A UV Index of 3 to 5 symbolizes a medium vulnerability from exposure to the Sun's UV radiation for ordinary individuals.Note: In September, the maximum UV index of 3 transforms into these recommendations:
Exercise caution. Those with pale skin may experience burns in less than half an hour. Sun's radiation is most powerful around mid-day, so it's best to limit outdoor activities during this time. During bright days, sunglasses that offer UVA and UVB defense are recommended. Stay alert! Snow's reflective properties can almost double the UV radiation from the Sun.
Frequently asked questions
What is the temperature in September in Rolleston?
What is the average humidity in September in Rolleston?
What is the driest month in Rolleston?
How many days does it rain in September in Rolleston?
What is the last month it snows in Rolleston?
What is the average length of the day in September in Rolleston?
When is the sunrise / sunset in September in Rolleston?
When does Daylight Saving Time (DST) start in September in Rolleston?
How long on average sun shines in September in Rolleston?
What is the month with the lowest UV index in Rolleston?
What is the UV index reading in September in Rolleston?
Average temperature in September
Rolleston, New Zealand
- Average high temperature in September: 13.2°C
The warmest month (with the highest average high temperature) is January (21.3°C).
The month with the lowest average high temperature is July (10.3°C).
- Average low temperature in September: 4.5°C
The month with the highest average low temperature is January (11.9°C).
The coldest month (with the lowest average low temperature) is July (3.8°C).
Average pressure in September
Rolleston, New Zealand
- Average pressure in September: 1011mbar
The month with the highest atmospheric pressure is March (1016.9mbar).
The month with the lowest atmospheric pressure is November (1010.9mbar).
Average wind speed in September
Rolleston, New Zealand
- Average wind speed in September: 13.8km/h
The windiest month (with the highest average wind speed) is January (15.3km/h).
The calmest month (with the lowest average wind speed) is August (12.4km/h).
Average humidity in September
Rolleston, New Zealand
- Average humidity in September: 78%
The month with the highest relative humidity is June (81%).
The month with the lowest relative humidity is January (70%).
Average rainfall in September
Rolleston, New Zealand
- Average rainfall in September: 14mm
The wettest month (with the highest rainfall) is October (38mm).
The driest month (with the least rainfall) is September (14mm).
Average rainfall days in September
Rolleston, New Zealand
- Average rainfall days in September: 8.2 days
The month with the highest number of rainy days is October (12.5 days).
The month with the least rainy days is May (8 days).
Average snowfall in September
Rolleston, New Zealand
- Average snowfall in September: 3mm
The month with the highest snowfall is August (5mm).
The months with the least snowfall are January, February, March, April, May, October, November and December (0mm).
Average snowfall days in September
Rolleston, New Zealand
- Average snowfall days in September: 0.1 days
The months with the highest number of snowfall days are June and August (0.3 days).
The months with the least snowfall days are January, February, March, April, October, November and December (0 days).
Average daylight in September /
Average sunshine in September
Rolleston, New Zealand
- Average daylight in September: 11h and 5min
The month with the longest days is December (Average daylight: 15h and 24min).
The month with the shortest days is June (Average daylight: 9h and 0min).
- Average sunshine in September: 7h and 4min
The month with the most sunshine is December (Average sunshine: 10h and 24min).
The month with the least sunshine is June (Average sunshine: 5h and 6min).
Average sunshine days in September
Rolleston, New Zealand
- Average sunshine days in September: 20 days
The month with the most sunshine days is May (21.2 days).
The month with the least sunshine days is November (17.3 days).
Average UV index in September
Rolleston, New Zealand
- Average UV index in September: 3
The month with the highest UV index is January (UV index 5).
The months with the lowest UV index are April, May, June, July, August and September (UV index 3).
Average cloud cover in September
Rolleston, New Zealand
- Average cloud cover in September: 38
The month with the most cloud cover is June (Cloud cover 43).
The months with the least cloud cover are January, February, March and May (Cloud cover 37).
Average visibility in September
Rolleston, New Zealand
- Average visibility in September: 9km
The months with the highest visibility are January, February, March, April, June, July and December (10km).
The months with the lowest visibility are May, August, September, October and November (9km).
Rolleston, New Zealand
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