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
Belfast's average high-temperature in September sits at a refreshing 13.2°C (55.8°F), showing little difference from the previous month. Throughout the month of September, the average temperature dips to a wintry 4.5°C (40.1°F) at night.Humidity
In September, the average relative humidity 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, Belfast aggregates 3mm (0.12") of snow. Throughout the year, in Belfast, there are 1 snowfall days, and 13mm (0.51") of snow is accumulated.Daylight
In September, the average length of the day is 11h and 47min.On the first day of September, sunrise is at 6:55 am and sunset at 6:03 pm NZST. On the last day of the month, sunrise is at 7:03 am and sunset at 7:35 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 Belfast, the average sunshine in September is 7.6h.UV index
The months with the lowest UV index in Belfast are April through September, with an average maximum UV index of 3. A UV Index reading of 3 to 5 represents a medium health hazard from exposure to the Sun's UV radiation for ordinary individuals.Note: A maximum high daily UV index of 3 during September translates into the following directions:
Exercise care. People with light skin might get burns in fewer than 30 minutes. Exposing oneself to the midday Sun can be harmful due to the strong UV radiation; limit your time outside. A wide-brimmed hat is a staple for defending the face, eyes, ears, and neck from the Sun. Take note! UV radiation from the Sun can double in intensity due to snow reflection.
Frequently asked questions
What is the usual temperature for Belfast in September?
What is the average humidity in September in Belfast?
What is the driest month in Belfast?
How much does it rain in Belfast in September?
What is the last month it snows in Belfast?
How many hours of daylight does Belfast have in September?
What time are sunrise and sunset in September in Belfast?
When does Daylight Saving Time (DST) start in September in Belfast?
How many hours of sunshine does Belfast have in September?
What are the months with the lowest UV index in Belfast?
How high is the UV index in September in Belfast?
Average temperature in September
Belfast, 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
Belfast, 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
Belfast, 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
Belfast, 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
Belfast, 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
Belfast, 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
Belfast, 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
Belfast, 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
Belfast, New Zealand
- Average daylight in September: 11h and 5min
The month with the longest days is December (Average daylight: 15h and 18min).
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
Belfast, 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
Belfast, 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
Belfast, 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
Belfast, 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).
Belfast, New Zealand
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