September weather - Spring 2024 - Adamstown, Pitcairn

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 sea temperature 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

The British territory of Adamstown in the Pitcairn Island viewed from the Pacific waters

Weather in September

With the arrival of September, Adamstown starts to shake off its winter persona. The weather during this time gradually warms up, with the temperature range stabilizing between 19.9°C (67.8°F) to 21.3°C (70.3°F). The city, too, transitions, preparing to welcome a new season of blooming flowers and sunny days. The high pressure settled at 1019.7mb contributes not only to the tranquillity of the environment but also to the slow but steady change of the clime. The air in Adamstown during September promises freshness, paving the way for the imminent arrival of summer.

Temperature

Adamstown's temperature records reveal September as the coldest month, marked by average highs of 21.3°C (70.3°F) and lows of 19.9°C (67.8°F).

Humidity

In Adamstown, the average relative humidity in September is 77%.

Rainfall

In Adamstown, during September, the rain falls for 14.8 days and regularly aggregates up to 62mm (2.44") of precipitation. Throughout the year, there are 219.1 rainfall days, and 1048mm (41.26") of precipitation is accumulated.

Sea temperature

August and September, with an average sea temperature of 22.3°C (72.1°F), are months with the coldest seawater.
Note: Every individual's cold threshold differs, but factors like today's sunshine, wind, and temperature can tip the scales for a delightful swim in 22.3°C (72.1°F) waters. For reference, Olympians swim in waters of 25°C (77°F) to 28°C (82.4°F).

Daylight

In September, the average length of the day is 11h and 58min.
On the first day of the month, sunrise is at 06:51 and sunset at 18:29. On the last day of September, sunrise is at 06:20 and sunset at 18:39 -08.

Sunshine

In Adamstown, the average sunshine in September is 7.3h.

UV index

The months with the lowest UV index in Adamstown are June, August and September, with an average maximum UV index of 5. A UV Index reading of 3 to 5 represents a moderate health risk from exposure to the Sun's UV rays for ordinary individuals.
Note: A maximum high daily UV index of 5 during September translates into the following directions:
Take necessary precautions - Defending against sun damage is advocated. Minimize direct exposure to the Sun during midday when its radiation is at its peak. Fend off the sun's harsh rays with appropriate clothing, a wide-brim hat, and UV-protective sunglasses. Stay vigilant! UV rays get a boost in intensity due to sand and water reflections.

Updated: Jan 29, 2024
Published by: Weather Atlas | About Us
Data Sources | Weather Forecasting & Climate

Frequently asked questions

What month is the coldest in Adamstown?

Adamstown's September weather reaches an average high of 21.3°C (70.3°F) and an average low of 19.9°C (67.8°F), making it the coldest month.

What are September temperatures in Adamstown?

In September, the average high-temperature and low-temperature in Adamstown, Pitcairn, are 21.3°C (70.3°F) and 19.9°C (67.8°F) respectively.

What is the average humidity in September in Adamstown?

The average relative humidity in September in Adamstown is 77%.

How much does it rain in Adamstown in September?

In Adamstown, Pitcairn, in September, during 14.8 rainfall days, 62mm (2.44") of precipitation is typically accumulated.

What months are the sea coldest in Adamstown?

The months with the coldest seawater in Adamstown are August and September, with an average sea temperature of 22.3°C (72.1°F).

What is the water temperature in September in Adamstown?

In Adamstown, Pitcairn, the average seawater temperature in September is 22.3°C (72.1°F). For individuals prone to feeling cold, swimming in 23°C (73.4°F) is still regarded as intolerable. A wetsuit is not a necessity, but sunshine, wind, and air temperature are essential factors for relishing swimming at 22.3°C (72.1°F).

What is the average length of the day in September in Adamstown?

In September, the average day length in Adamstown, Pitcairn, is 11h and 58min.

When is the sunrise / sunset in September in Adamstown?

In September, on the first day of the month, sunrise is at 06:51 and sunset at 18:29. On the last day of the month, sunrise is at 06:20 and sunset at 18:39 -08.

How long on average sun shines in September in Adamstown?

In Adamstown, the average sunshine duration in September is 7.3h.

What are the months with the lowest UV index in Adamstown?

The months with the lowest UV index in Adamstown, Pitcairn, are June, August and September, with an average maximum UV index of 5.

What is the UV index intensity in September in Adamstown?

In September, the average daily maximum UV index in Adamstown is 5. A UV Index estimate of 3 to 5 represents a medium health risk from unprotected exposure to UV radiation.

Today

Tomorrow

Long-term

Year J F M A M J J A September O N D

Aug

September

Oct

Average high temperature

21.4°C 70.5°F

21.3°C 70.3°F

21.5°C 70.7°F

Average low temperature

Average pressure

Average wind speed

Average max. wind speed

26.7km/h 16.6mph

25.3km/h 15.7mph

Average wind speed gusts

Average humidity

Average rainfall

Average rainfall days

18.1

14.8

19.2

Average sea temperature

Average daylight

Average sunshine

Average sunshine days

7.8

9.5

6.4

Average UV index

Average cloud cover

48%

50%

Average visibility

10km 6.2mi

Average temperature in September
Adamstown, Pitcairn

Average high temperature in September: 21.3°C

The warmest months (with the highest average high temperature) are February and March (26.2°C).
The month with the lowest average high temperature is September (21.3°C).

Average low temperature in September: 19.9°C

The months with the highest average low temperature are February and March (25.3°C).
The coldest month (with the lowest average low temperature) is August (19.8°C).

Average pressure in September
Adamstown, Pitcairn

Average pressure in September: 1019.7mbar

The month with the highest atmospheric pressure is September (1019.7mbar).
The month with the lowest atmospheric pressure is January (1016.3mbar).

Average wind speed in September
Adamstown, Pitcairn

Average wind speed in September: 24.7km/h

The windiest month (with the highest average wind speed) is July (26.2km/h).
The calmest month (with the lowest average wind speed) is February (20.3km/h).

Average humidity in September
Adamstown, Pitcairn

Average humidity in September: 77%

The months with the highest relative humidity are January, October, November and December (78%).
The month with the lowest relative humidity is July (75%).

Average rainfall in September
Adamstown, Pitcairn

Average rainfall in September: 62mm

The wettest month (with the highest rainfall) is December (112mm).
The driest month (with the least rainfall) is July (57mm).

Average rainfall days in September
Adamstown, Pitcairn

Average rainfall days in September: 14.8 days

The month with the highest number of rainy days is January (22 days).
The month with the least rainy days is September (14.8 days).

Average sea temperature in September
Adamstown, Pitcairn

Average sea temperature in September: 22.3°C

The best month for swimming (with the highest average sea temperature) is March (27.3°C).
The coldest months (with the lowest average sea temperature) are August and September (22.3°C).

Average daylight in September /
Average sunshine in September
Adamstown, Pitcairn

Average daylight in September: 12h and 0min

The month with the longest days is December (Average daylight: 13h and 42min).
The month with the shortest days is June (Average daylight: 10h and 36min).

Average sunshine in September: 7h and 2min

The month with the most sunshine is December (Average sunshine: 9h and 12min).
The month with the least sunshine is June (Average sunshine: 6h and 0min).

Average sunshine days in September
Adamstown, Pitcairn

Average sunshine days in September: 9.5 days

The month with the most sunshine days is July (10.6 days).
The month with the least sunshine days is January (4.9 days).

Average UV index in September
Adamstown, Pitcairn

Average UV index in September: 5

The months with the highest UV index are January and February (UV index 7).
The months with the lowest UV index are June, August and September (UV index 5).

Average cloud cover in September
Adamstown, Pitcairn

Average cloud cover in September: 48

The month with the most cloud cover is October (Cloud cover 50).
The month with the least cloud cover is February (Cloud cover 40).

Average visibility in September
Adamstown, Pitcairn

Average visibility in September: 10km

The months with the highest visibility are January, February, March, April, May, June, July, August, September, October, November and December (10km).
The months with the lowest visibility are January, February, March, April, May, June, July, August, September, October, November and December (10km).

September weather forecast
Adamstown, Pitcairn

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