September weather forecast
Saipan, Northern Mariana Islands, USA

Beautiful clear waters and white sandy beaches around the stunning Bird Island in Saipan, Northern Mariana Islands
Beautiful clear waters and white sandy beaches around the stunning Bird Island in Saipan, Northern Mariana Islands

Weather in September

September, the first month of the autumn in Saipan, is still a warm month, with an average temperature varying between 83.8°F (28.8°C) and 75°F (23.9°C).

Temperature

In September, the average high-temperature is essentially the same as in August - a still warm 83.8°F (28.8°C). In September, the average low-temperature is 75°F (23.9°C).

Rainfall

In Saipan, it is raining for 19 days, with typically 11.65" (295.9mm) of accumulated precipitation. Throughout the year, in Saipan, there are 244 rainfall days, and 83.39" (2118.2mm) of precipitation is accumulated.

Ocean temperature

The months with the warmest seawater are June through November, with an average ocean temperature of 84.2°F (29°C).
Note: For any water activity, surface water temperatures between 77°F (25°C) and 84.2°F (29°C) are considered as excellent and extremely pleasant for lengthened periods.

Daylight

The average length of the day in September is 12h and 13min.
On the first day of the month, sunrise is at 6:04 am and sunset at 6:29 pm. On the last day of September, in Saipan, sunrise is at 6:06 am and sunset at 6:07 pm ChST.

Sunshine

The months with the least sunshine in Saipan are August through December, with an average of 5h of sunshine.

UV index

February through September, with an average maximum UV index of 12, are months with the highest UV index in Saipan, Northern Mariana Islands. A UV Index estimate of 11, and higher, represents an ultimate health vulnerability from unprotected exposure to Sun's UV rays for the average person.
Note: The daily maximum UV index of 12 in September interpret into the following advice:
Take all necessary precautions, as unprotected skin can burn in minutes. The Sun's UV radiation is most powerful between 10 a.m. and 4 p.m. To the extent possible, limit exposure to the direct sun during these hours. On bright days sunglasses that block both UVA and UVB rays should be worn. A hat with a wide brim is extremely helpful, as it can prevent roughly 50% of UV radiation from reaching the eyes. Even on cloudy days, a sunscreen with a minimum 30 sun protection factor should be generously applied and frequently re-applied, including after every swim or outdoor exercise. Beware! The strength of the UV rays is significantly increased by the reflection of the water and sand.
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FAQ

How many days does it rain in September in Saipan?

In Saipan, Northern Mariana Islands, in September, during 19 rainfall days, 11.65" (295.9mm) of precipitation is typically accumulated.

What are the months with the warmest ocean in Saipan?

The months with the warmest seawater in Saipan are June through November, with an average ocean temperature of 84.2°F (29°C).

What is the ocean temperature in September in Saipan?

In September, the average ocean temperature is 84.2°F (29°C). Water temperature between 77°F (25°C) and 84.2°F (29°C) is regarded as very warm and enjoyable by all. With these temperatures, water activities are pleasurable, without feeling uncomfortable for prolonged periods.

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

In Saipan, the average day length in September is 12h and 13min.

When are sunrise and sunset in September in Saipan?

In September, on the first day of the month, sunrise is at 6:04 am and sunset at 6:29 pm. On the last day of the month, in Saipan, Northern Mariana Islands, sunrise is at 6:06 am and sunset at 6:07 pm ChST.

What is the month with the least sunshine in Saipan?

The months with the least sunshine are August through December, with an average of 5h of sunshine.

How many hours of sunshine does Saipan have in September?

In September, the average sunshine duration in Saipan, Northern Mariana Islands, is 5h.

What are the months with the highest UV index in Saipan?

February through September, with an average maximum UV index of 12, are months with the highest UV index in Saipan.

What is the UV index reading in September in Saipan?

The average daily maximum UV index in September in Saipan, Northern Mariana Islands, is 12. A UV Index value of 11, and more, symbolizes an ultimate hazard to health from exposure to Sun's UV rays.

Average temperature in September
Saipan, Northern Mariana Islands, USA

Average temperature in September - Saipan, Northern Mariana Islands, USA
  • Average high temperature in September: 83.8°F

The warmest month (with the highest average high temperature) is June (85°F).
The month with the lowest average high temperature is February (79.7°F).

  • Average low temperature in September: 75°F

The month with the highest average low temperature is May (75.5°F).
The coldest month (with the lowest average low temperature) is February (72.9°F).

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Average rainfall in September
Saipan, Northern Mariana Islands, USA

Average rainfall in September - Saipan, Northern Mariana Islands, USA
  • Average rainfall in September: 11.7"

The wettest month (with the highest rainfall) is August (12.4").
The driest month (with the least rainfall) is March (2.4").

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Average rainfall days in September
Saipan, Northern Mariana Islands, USA

Average rainfall days in September - Saipan, Northern Mariana Islands, USA
  • Average rainfall days in September: 19 days

The months with the highest number of rainy days are January and December (23 days).
The month with the least rainy days is June (17 days).

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Average sea temperature in September
Saipan, Northern Mariana Islands, USA

Average sea temperature in September - Saipan, Northern Mariana Islands, USA
  • Average sea temperature in September: 84°F

The best months for swimming (with the highest average sea temperature) are June, July, August, September, October and November (84°F).
The coldest months (with the lowest average sea temperature) are February and March (81°F).

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Average daylight in September /
Average sunshine in September
Saipan, Northern Mariana Islands, USA

Average daylight in September / Average sunshine in September - Saipan, Northern Mariana Islands, USA
  • Average daylight in September: 12h and 13min

The month with the longest days is June (Average daylight: 13h and 1min).
The month with the shortest days is December (Average daylight: 11h and 15min).

  • Average sunshine in September: 5h

The months with the most sunshine are March, April, May and June (Average sunshine: 7h).
The months with the least sunshine are August, September, October, November and December (Average sunshine: 5).

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Average UV index in September
Saipan, Northern Mariana Islands, USA

Average UV index in September - Saipan, Northern Mariana Islands, USA
  • Average UV index in September: 12

The months with the highest UV index are February, March, April, May, June, July, August and September (UV index 12).
The months with the lowest UV index are November and December (UV index 9).

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