September weather forecast and climate
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
September, the first month of the autumn, in Saipan, is also a moderately hot month, with temperature in the range of an average low of 75°F (23.9°C) and an average high of 83.8°F (28.8°C).

Temperature

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

Rainfall

In September, the rain falls for 19 days. Throughout September, 11.65" (295.9mm) of precipitation is accumulated. In Saipan, during the entire year, the rain falls for 244 days and collects up to 83.39" (2118.2mm) of precipitation.

Ocean temperature

June through November, with an average ocean temperature of 84.2°F (29°C), are months with the warmest seawater.
Note: For swimming, diving, and other water activities, temperatures between 77°F (25°C) and 84.2°F (29°C) are perceived as very enjoyable and pleasurable for prolonged periods without feeling uncomfortable.

Daylight

In September, the average length of the day in Saipan is 12.2h.

Sunshine

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

UV index

Months with the highest UV index are February through September, with an average maximum UV index of 12. A UV Index of 11, and more, symbolizes an extreme health hazard from unsafe exposure to the UV radiation for average individuals.
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 reflection of water and sand dramatically increases exposure to the UV rays.

What is the temperature in September in Saipan?

The average high-temperature, in September, is 83.8°F (28.8°C), while the average low-temperature is 75°F (23.9°C).

How much does it rain in Saipan in September?

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

When is the ocean warmest in Saipan?

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

What is the water temperature in September in Saipan?

In Saipan, Northern Mariana Islands, the average seawater temperature in September is 84.2°F (29°C). For swimming, diving, and other water activities, temperatures between 77°F (25°C) and 84.2°F (29°C) are perceived as very enjoyable and pleasurable for prolonged periods without feeling uncomfortable.

How many hours of daylight does Saipan have in September?

The average length of the day in September in Saipan, Northern Mariana Islands, is 12.2h.

What is the month with the least sunshine in Saipan?

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

How long on average sun shines in September in Saipan?

The average sunshine in September in Saipan is 5h.

What is the month with the highest UV index in Saipan?

Months with the highest UV index in Saipan, Northern Mariana Islands, are February through September, with an average maximum UV index of 12.

What is the UV index reading in September in Saipan?

The average daily maximum UV index in September is 12. A UV Index value of 11, and more, symbolizes an ultimate hazard to health from the exposure to the Sun's UV radiation.
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).

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").

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

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).

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).

Average daylight in September / Average sunshine in September - Saipan, Northern Mariana Islands, USA
  • Average daylight in September: 12.2h

The month with the longest days is June (Average daylight: 13h).
The month with the shortest days is December (Average daylight: 11.2h).

  • Average sunshine in September: 5h

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

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

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