September weather forecast and climate
Kwajalein, Marshall Islands

September, the first month of the autumn, in Kwajalein, is still a hot month, with average temperature varying between 25°C (77°F) and 31°C (87.8°F).

Temperature

June through November, with an average high-temperature of 31°C (87.8°F), are warmest months.

Rainfall

In September, the rain falls for 18 days. Throughout September, 270mm (10.6") of precipitation is accumulated. Throughout the year, there are 224 rainfall days, and 2605mm (102.6") of precipitation is accumulated.

Sea temperature

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

Daylight

The average length of the day in September is 12.2h.

Sunshine

The average sunshine is 18h.

UV index

February through October, with an average UV index of 12, are months with the highest UV index.

What are the warmest months in Kwajalein?

Warmest months are June through November, with an average high-temperature of 31°C (87.8°F).

What is the temperature in September in Kwajalein?

In Kwajalein, Marshall Islands, in September, the average high-temperature is 31°C (87.8°F), and the average low-temperature is 25°C (77°F).

How much does it rain in Kwajalein in September?

In Kwajalein, in September, it is raining for 18 days, with typically 270mm (10.6") of accumulated precipitation.

What are the months with the warmest sea water in Kwajalein?

June through November, with an average sea temperature of 29°C (84.2°F), are months with the warmest seawater. Water temperature between 25°C (77°F) and 29°C (84.2°F) is regarded as very warm and enjoyable by all. With these temperatures, water activities are pleasurable, without feeling uncomfortable for prolonged periods.

How warm is the water in September in Kwajalein?

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

How many hours of daylight does Kwajalein have in September?

The average length of the day in September in Kwajalein is 12.2h.

How many hours of sunshine does Kwajalein have in September?

The average sunshine in September in Kwajalein, Marshall Islands, is 18h.

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

Months with the highest UV index in Kwajalein, Marshall Islands, are February through October, with an average UV index of 12.

How high is the UV index in September in Kwajalein?

The average UV index in September is 12.
Average temperature in September - Kwajalein, Marshall Islands
  • Average high temperature in September: 31°C

Warmest months (with the highest average high temperature) are June, July, August, September, October and November (31°C).
Months with the lowest average high temperature are January, February, March, April, May and December (30°C).

  • Average low temperature in September: 25°C

Months with the highest average low temperature are January, February, March, April, May, June, July, August, September, October, November and December (25°C).
Coldest months (with the lowest average low temperature) are January, February, March, April, May, June, July, August, September, October, November and December (25°C).

Average rainfall in September - Kwajalein, Marshall Islands
  • Average rainfall in September: 270mm

The wettest month (with the highest rainfall) is October (282mm).
The driest month (with the lowest rainfall) is February (123mm).

Average rainfall days in September - Kwajalein, Marshall Islands
  • Average rainfall days in September: 18 days

The month with the highest number of rainy days is January (21 days).
The month with the lowest number of rainy days is June (16 days).

Average sea temperature in September - Kwajalein, Marshall Islands
  • 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 January, February, March, April, May and December (28°C).

Average daylight in September / Average sunshine in September - Kwajalein, Marshall Islands
  • Average daylight in September: 12.2h

Months with the longest days are June and July (Average daylight: 12.6h).
The month with shortest days is December (Average daylight: 11.6h).

  • Average sunshine in September: 18h

The month with most sunshine is January (Average sunshine: 21h).
The month with least sunshine is June (Average sunshine: 16h).

Average UV index in September - Kwajalein, Marshall Islands
  • Average UV index in September: 12

Months with the highest UV index are February, March, April, May, June, July, August, September and October (UV index 12).
The month with the lowest UV index is December (UV index 10).

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