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
The first month of the autumn, September, is still a warm month in Saipan, Northern Mariana Islands, 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 September, the average high-temperature is essentially the same as in August - a still moderately hot 83.8°F (28.8°C). The average low-temperature, in Saipan, 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. Throughout the year, there are 244 rainfall days, and 83.39" (2118.2mm) of precipitation is accumulated.

Ocean temperature

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 Saipan is 12.2h.

Sunshine

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. A UV Index reading of 11, and higher, represents an extreme health hazard from the exposure to the Sun's UV rays for average individuals.
Note: The daily maximum UV index of 12 in September interpret into the following advice:
Take all required precautions, as unprotected skin and eyes 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. Sun-protective clothing, a long-sleeved shirt and pants, a wide-brimmed hat, and UVA and UVB-blocking sunglasses are particularly helpful in blocking UV radiation's harmful effects. 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?

In September, in Saipan, 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, it is raining for 19 days, with typically 11.65" (295.9mm) of accumulated precipitation.

What months are the ocean warmest in Saipan?

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

How warm is the water in September in Saipan?

In September, the average ocean temperature in Saipan is 84.2°F (29°C). 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.

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

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?

Months with the least sunshine in Saipan, Northern Mariana Islands, are August through December, with an average of 5h of sunshine.

How long on average sun shines in September in Saipan?

In Saipan, the average sunshine in September 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.

What is the UV index reading in September in Saipan?

In Saipan, Northern Mariana Islands, the average daily maximum UV index in September is 12. A UV Index value of 11, and more, symbolizes an excessive health risk from the exposure to the Sun's UV rays.
Average temperature in September - Saipan, Northern Mariana Islands, USA
  • Average high temperature in September: 28.8°C

The warmest month (with the highest average high temperature) is June (29.4°C).
The month with the lowest average high temperature is February (26.5°C).

  • Average low temperature in September: 23.9°C

The month with the highest average low temperature is May (24.2°C).
The coldest month (with the lowest average low temperature) is February (22.7°C).

Average rainfall in September - Saipan, Northern Mariana Islands, USA
  • Average rainfall in September: 295.9mm

The wettest month (with the highest rainfall) is August (315.5mm).
The driest month (with the lowest rainfall) is March (61mm).

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: 29°C

Best months for swimming (with the highest average sea temperature) are June, July, August, September, October and November (29°C).
Coldest months (with the lowest average sea temperature) are February and March (27°C).

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).