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
September
Weather in September
Temperature
Heriot's shift into September is marked by a subtle change to a cool 10.9°C (51.6°F) from August's 9.8°C (49.6°F) in temperature. Throughout September, Heriot registers a consistent average low-temperature of 4.5°C (40.1°F).Humidity
The average relative humidity in September is 79%.Rainfall
The month with the least rainfall in Heriot is September, when the rain falls for 14 days and typically collects 26mm (1.02") of precipitation.Snowfall
Months with snowfall in Heriot are May, July through September. September is the last month it regularly snows in Heriot. During 0.4 snowfall days, in September, Heriot aggregates 7mm (0.28") of snow. In Heriot, during the entire year, snow falls for 2.1 days and aggregates up to 23mm (0.91") of snow.Daylight
In September, the average length of the day is 11h and 46min.On the first day of the month, sunrise is at 7:11 am and sunset at 6:13 pm NZST. On the last day of September, in Heriot, sunrise is at 7:15 am and sunset at 7:49 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 Heriot, the average sunshine in September is 7.2h.UV index
The months with the lowest UV index are April through October, with an average maximum UV index of 3. A UV Index estimate of 3 to 5 represents a medium vulnerability from unprotected exposure to Sun's UV rays for ordinary individuals.Note: In September, the maximum UV index of 3 suggests these recommendations:
Take care. Persons with lighter skin might suffer burns in less than 30 minutes. Avoiding direct sunlight during midday hours helps reduce the risk from intense UV radiation. On days when the sun blazes, arm yourself with sunglasses that block UVA and UVB radiation. Beware! The strength of the UV rays is increased nearly double-fold by the reflection of the snow.
Published by: Weather Atlas | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What is the average September temperature in Heriot?
What is the average humidity in September in Heriot?
What is the driest month in Heriot?
How many days does it rain in September in Heriot?
What is the last month it snows in Heriot?
How many hours of daylight does Heriot have in September?
When are sunrise and sunset in September in Heriot?
When does Daylight Saving Time (DST) start in September in Heriot?
How many hours of sunshine does Heriot have in September?
What are the months with the lowest UV index in Heriot?
What is the UV index intensity in September in Heriot?
Average temperature in September
Heriot, New Zealand
- Average high temperature in September: 10.9°C
The warmest months (with the highest average high temperature) are January and February (17.3°C).
The month with the lowest average high temperature is July (8.6°C).
- Average low temperature in September: 4.5°C
The month with the highest average low temperature is January (9.8°C).
The coldest month (with the lowest average low temperature) is July (3.8°C).
Average pressure in September
Heriot, New Zealand
- Average pressure in September: 1009.7mbar
The month with the highest atmospheric pressure is March (1016.1mbar).
The months with the lowest atmospheric pressure are September and November (1009.7mbar).
Average wind speed in September
Heriot, New Zealand
- Average wind speed in September: 16.3km/h
The windiest month (with the highest average wind speed) is October (16.7km/h).
The calmest month (with the lowest average wind speed) is February (13.5km/h).
Average humidity in September
Heriot, New Zealand
- Average humidity in September: 79%
The month with the highest relative humidity is August (82%).
The months with the lowest relative humidity are October and November (78%).
Average rainfall in September
Heriot, New Zealand
- Average rainfall in September: 26mm
The wettest month (with the highest rainfall) is November (64mm).
The driest month (with the least rainfall) is September (26mm).
Average rainfall days in September
Heriot, New Zealand
- Average rainfall days in September: 14 days
The month with the highest number of rainy days is October (18.8 days).
The month with the least rainy days is June (13.1 days).
Average snowfall in September
Heriot, New Zealand
- Average snowfall in September: 7mm
The month with the highest snowfall is August (11mm).
The months with the least snowfall are January, February, March, April, June, October, November and December (0mm).
Average snowfall days in September
Heriot, New Zealand
- Average snowfall days in September: 0.4 days
The month with the highest number of snowfall days is August (0.7 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
Heriot, New Zealand
- Average daylight in September: 11h and 5min
The month with the longest days is December (Average daylight: 15h and 42min).
The month with the shortest days is June (Average daylight: 8h and 42min).
- Average sunshine in September: 7h and 1min
The month with the most sunshine is December (Average sunshine: 10h and 18min).
The month with the least sunshine is June (Average sunshine: 4h and 42min).
Average sunshine days in September
Heriot, New Zealand
- Average sunshine days in September: 12.4 days
The month with the most sunshine days is July (14.8 days).
The month with the least sunshine days is November (8.5 days).
Average UV index in September
Heriot, 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, September and October (UV index 3).
Average cloud cover in September
Heriot, New Zealand
- Average cloud cover in September: 43
The months with the most cloud cover are October and November (Cloud cover 47).
The month with the least cloud cover is March (Cloud cover 42).
Average visibility in September
Heriot, New Zealand
- Average visibility in September: 9km
The months with the highest visibility are June and July (10km).
The months with the lowest visibility are January, February, March, April, May, August, September, October, November and December (9km).
