Saipan
Northern Mariana Islands, USA
Long-term weather forecast
Long-term weather forecast

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 still a warm month, with average temperature ranging between min 75°F (23.9°C) and max 83.8°F (28.8°C).

Temperature

In Saipan, 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 September, the rain falls for 19 days. Throughout September, 11.6" (295.9mm) of precipitation is accumulated. In Saipan, during the entire year, the rain falls for 244 days and collects up to 83.4" (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 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

In Saipan, Northern Mariana Islands, the average length of the day is 12.2h.

Sunshine

Months with the least sunshine in Saipan, Northern Mariana Islands, 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. A UV Index reading of 11, and higher, represents an ultimate health vulnerability from the exposure to the Sun's UV radiation for average individuals.
Note: The average daily UV index of 12 in September transform into the following instructions:
Practice all essential precautions. Protection against sun damage is crucial. Seek shade and minimize exposure to direct Sun in a period between 10 a.m. and 4 p.m. when UV radiation is most intense; keep in mind that shade structures like parasols or canopies do not provide perfect sun protection. 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. A broad-spectrum sunscreen of SPF 30+ should be liberally applied and re-applied every two hours, and immediately after an outdoor workout or a swim. Caution! The reflection of sand and water significantly increases the intensity of the Sun's UV radiation.

What is the temperature in September in Saipan?

In September, in Saipan, Northern Mariana Islands, the average high-temperature is 83.8°F (28.8°C), and 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, 11.6" (295.9mm) of precipitation is typically accumulated.

What months are 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.

How warm is the water in September in Saipan?

In September, the average ocean temperature in Saipan 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?

The average length of the day in September 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.

How long on average sun shines in September in Saipan?

In September, the average sunshine in Saipan is 5h.

What is the month 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, Northern Mariana Islands.

How high is the UV index in September in Saipan?

In Saipan, the average daily maximum UV index in September is 12. A UV Index reading of 11, and higher, represents an extreme health threat 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 lowest 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 lowest number of rainy days is June (17 days).

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

Best months for swimming (with the highest average sea temperature) are June, July, August, September, October and November (84°F).
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 shortest days is December (Average daylight: 11.2h).

  • Average sunshine in September: 5h

Months with most sunshine are March, April, May and June (Average sunshine: 7h).
Months with 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).