September weather forecast
Napier, New Zealand

September sees Napier in a delightful transition phase, greeting spring with open arms. The weather retains its charm with a noticeable increase in daylight and sunshine hours. Though the sea remains chilly, surfers are drawn to the ocean's waves, whilst the floral explosion elsewhere paints a picturesque landscape. During this beautiful crossover into spring, the weather sees a substantial improvement, with temperatures ranging from 8.1°C (46.6°F) to 17.3°C (63.1°F). As the month concludes, the greatest spring shows prepare to unfold in the upcoming months.

Temperature

With September's arrival, Napier's weather records an average high-temperature of an enjoyable 17.3°C (63.1°F), marking little difference from August's 15.1°C (59.2°F). Napier reports an average nighttime low-temperature of 8.1°C (46.6°F) in September.

Humidity

In September, the average relative humidity in Napier, New Zealand, is 69.2%.

Rainfall

In Napier, during September, the rain falls for 7.4 days and regularly aggregates up to 58mm (2.28") of precipitation. In Napier, during the entire year, the rain falls for 87.9 days and collects up to 785mm (30.91") of precipitation.

Sea temperature

In Napier, in September, the average water temperature is 13.9°C (57°F).
Note: While a brief time in 13.9°C (57°F) at 13°C (55.4°F) is already bracing, plunging below 10°C (50°F) can severely affect breathing and introduce a cold shock, relying on your physical state.

Daylight

In Napier, the average length of the day in September is 11h and 50min.
On the first day of the month, sunrise is at 6:35 am and sunset at 5:49 pm NZST. On the last day of September, in Napier, New Zealand, sunrise is at 6:48 am and sunset at 7:16 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 6h.

UV index

The average daily maximum UV index in September in Napier is 4. A UV Index of 3 to 5 symbolizes a moderate threat to health from exposure to the Sun's UV radiation for ordinary individuals.
Note: During September, 4 as the daily maximum UV index converts into the following advice:
Take necessary precautions - Protection from skin and eye injury is mandatory. For health reasons, it's advisable to reduce direct sun exposure during peak hours around midday. To cut down UV radiation exposure by about half, sport a wide-brim hat.