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Weather in September
September ushers in the first signs of spring with an average temperature of 15°C (59°F), marking a significant shift from the cooler climes of the past few months. As the temperatures gradually begin to rise, the conditions start favoring outdoor activities. Rainfall frequency decreases, drawing a clear distinction from the colder months. Days lengthen, giving early indications of spring. The sporadic rainfall episodes coupled with the gently warming climate mark the onset of the blooming period in New Plymouth.
Note: You can swim in 14°C (57.2°F) below 10°C (50°F) with proper thermal wear; failing that, the cold shock and respiratory challenges are nearly certain. A short span at 13°C (55.4°F) without it is tough.
On the first day of the month, sunrise is at 6:46 am and sunset at 6:01 pm NZST. On the last day of September, in New Plymouth, sunrise is at 6:59 am and sunset at 7:27 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.
Note: A daily high UV index of 4 in September leads to these guidelines:
Adopt protective measures - Suggestions to resist sunburn are offered. The midday Sun can be dangerous due to its intense radiation; always find shade and reduce exposure. A wide-brimmed hat provides unparalleled sun protection for sensitive areas like the eyes, ears, and neck.
Temperature
New Plymouth's shift into September is marked by a subtle change to a still mild 15°C (59°F) from August's 14°C (57.2°F) in temperature. An average low-temperature of 8°C (46.4°F) is observed during September nights in New Plymouth.Humidity
In New Plymouth, the average relative humidity in September is 82.7%.Rainfall
In New Plymouth, New Zealand, in September, during 12.6 rainfall days, 105mm (4.13") of precipitation is typically accumulated. Throughout the year, in New Plymouth, there are 134.8 rainfall days, and 1386mm (54.57") of precipitation is accumulated.Sea temperature
The months with the coldest seawater are July through October, with an average sea temperature of 14°C (57.2°F).Note: You can swim in 14°C (57.2°F) below 10°C (50°F) with proper thermal wear; failing that, the cold shock and respiratory challenges are nearly certain. A short span at 13°C (55.4°F) without it is tough.
Daylight
The average length of the day in September in New Plymouth is 11h and 50min.On the first day of the month, sunrise is at 6:46 am and sunset at 6:01 pm NZST. On the last day of September, in New Plymouth, sunrise is at 6:59 am and sunset at 7:27 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 is 5.4h.UV index
In New Plymouth, New Zealand, the average daily maximum UV index in September is 4. A UV Index reading of 3 to 5 represents a medium health hazard from exposure to the Sun's UV rays for average individuals.Note: A daily high UV index of 4 in September leads to these guidelines:
Adopt protective measures - Suggestions to resist sunburn are offered. The midday Sun can be dangerous due to its intense radiation; always find shade and reduce exposure. A wide-brimmed hat provides unparalleled sun protection for sensitive areas like the eyes, ears, and neck.
Updated: Jan 27, 2024
Published by: Weather Atlas | About Us
Data Sources | Weather Forecasting & Climate
Published by: Weather Atlas | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What are the temperatures in New Plymouth in September?
An average high-temperature, in September, in New Plymouth, is 15°C (59°F) and the average low-temperature is 8°C (46.4°F).
What is the average humidity in September in New Plymouth?
In New Plymouth, the average relative humidity in September is 82.7%.
How many days does it rain in September in New Plymouth?
In New Plymouth, in September, it is raining for 12.6 days, with typically 105mm (4.13") of accumulated precipitation.
What are the months with the coldest sea water in New Plymouth?
July through October, with an average sea temperature of 14°C (57.2°F), are months with the coldest seawater in New Plymouth.
What is the water temperature in September in New Plymouth?
In New Plymouth, New Zealand, the average seawater temperature in September is 14°C (57.2°F). At temperatures below 10°C (50°F), swimming in a suitably protected swimsuit is feasible; otherwise, cold shock and loss of breathing control are imminent. Even a short swim, without thermal protection, at temperatures around 13°C (55.4°F) is not comfortable.
What is the average length of the day in September in New Plymouth?
The average day length in September is 11h and 50min.
What time are sunrise and sunset in September in New Plymouth?
On the first day of September, sunrise is at 6:46 am and sunset at 6:01 pm NZST. On the last day of the month, sunrise is at 6:59 am and sunset at 7:27 pm NZDT.
When does Daylight Saving Time (DST) start in September in New Plymouth?
On Sunday, 29. September 2024, at 2:00 am, Daylight Saving Time starts in New Plymouth, New Zealand, and the time zone changes from NZST to NZDT. DST ends on Sunday, 06. April 2025, at 3:00 am.
How long on average sun shines in September in New Plymouth?
In New Plymouth, the average sunshine duration in September is 5.4h.
What is the UV index reading in September in New Plymouth?
In September, the average daily maximum UV index in New Plymouth, New Zealand, is 4. A UV Index estimate of 3 to 5 represents a medium hazard to health from exposure to the Sun's UV radiation.
Average temperature in September
New Plymouth, New Zealand
- Average high temperature in September: 15°C
The warmest month (with the highest average high temperature) is February (22.1°C).
The month with the lowest average high temperature is July (13.3°C).
- Average low temperature in September: 8°C
The month with the highest average low temperature is February (13.9°C).
The coldest month (with the lowest average low temperature) is July (5.8°C).
Average humidity in September
New Plymouth, New Zealand
- Average humidity in September: 82.7%
The month with the highest relative humidity is June (86.1%).
The month with the lowest relative humidity is November (80.1%).
Average rainfall in September
New Plymouth, New Zealand
- Average rainfall in September: 104.8mm
The wettest month (with the highest rainfall) is June (152.6mm).
The driest month (with the least rainfall) is February (85.4mm).
Average rainfall days in September
New Plymouth, New Zealand
- Average rainfall days in September: 12.6 days
The month with the highest number of rainy days is October (14.1 days).
The month with the least rainy days is February (7.7 days).
Average sea temperature in September
New Plymouth, New Zealand
- Average sea temperature in September: 14°C
The best months for swimming (with the highest average sea temperature) are February and March (19°C).
The coldest months (with the lowest average sea temperature) are July, August, September and October (14°C).
Average daylight in September /
Average sunshine in September
New Plymouth, New Zealand
- Average daylight in September: 11h and 5min
The month with the longest days is December (Average daylight: 14h and 54min).
The month with the shortest days is June (Average daylight: 9h and 30min).
- Average sunshine in September: 5h and 2min
The months with the most sunshine are January and February (Average sunshine: 8h and 0min).
The month with the least sunshine is June (Average sunshine: 3h and 54min).
Average UV index in September
New Plymouth, New Zealand
- Average UV index in September: 4
The months with the highest UV index are January and December (UV index 11).
The months with the lowest UV index are May, June and July (UV index 2).
New Plymouth, New Zealand
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