Majuro
Marshall Islands
Long-term weather forecast
Long-term weather forecast

September weather forecast and climate
Majuro, Marshall Islands

A close view of sandy shores in Majuro, Marshall Islands, and a view of the sea line on the horizon
A close view of sandy shores in Majuro, Marshall Islands, and a view of the sea line on the horizon
September, the first month of the autumn, in Majuro, is also a hot month, with temperature in the range of an average low of 25.5°C (77.9°F) and an average high of 30.5°C (86.9°F).

Temperature

September and October, with an average high-temperature of 30.5°C (86.9°F), are the warmest months.

Heat index

In September, the average heat index is estimated at a torrid 39°C (102.2°F). Take extra precautions, as heat cramps and heat exhaustion are possible. Sustained activity may result in heatstroke.
Note that heat index values are valued for light wind and location in the shade. Exposure to direct sunshine can increase heat index values by up to 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'felt air temperature', 'real feel', 'apparent temperature', or 'feels like', is what the temperature feels like to the human body when the air temperature is combined with the relative humidity. Additional factors like activity, wind, differences in body mass, height, and shape, and clothing affect individual temperature impact. Be aware that direct exposure to sunlight increases heat impact, and may raise the heat index additionally, by up to 15 Fahrenheit (8 Celsius) degrees. Heat index values are especially crucial for babies and toddlers. Children are often less aware of the need to rest and re-hydrate. Thirst is a late sign of dehydration - it is vital to remain hydrated, particularly during prolonged physical activities.
The human body normally cools itself by perspiration. Excessive warmth is eliminated from the body by evaporation of sweat. With a lot of moisture in the air, the evaporation process is not as effective, and the body does not cool down as efficiently, creating a perception of overheating. When heat gain exceeds the level the body can remove, body temperature begins to rise, and heat-related illnesses and disorders may develop.

Humidity

In September, the average relative humidity is 79.4%.

Rainfall

In Majuro, during 22.9 rainfall days, 308.4mm (12.1") of precipitation is typically accumulated. Throughout the year, in Majuro, there are 256.2 rainfall days, and 3236.4mm (127.4") of precipitation is accumulated.

Sea temperature

Months with the warmest seawater are September and October, with an average sea temperature of 29.3°C (84.7°F).
Note: For any water activity, surface water temperatures between 25°C (77°F) and 29°C (84.2°F) are considered as excellent and extremely pleasant for lengthened periods.

Daylight

In Majuro, the average length of the day is 12.2h.

Sunshine

The average sunshine in September is 7.3h.

UV index

Months with the highest UV index are January through October, with an average maximum UV index of 12. A UV Index estimate of 11, and higher, represents an ultimate health vulnerability from unprotected exposure to the Sun's UV rays for the ordinary person.
Note: In September, the average maximum UV index of 12 translate into the following recommendations:
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. 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 are the warmest months in Majuro?

September and October, with an average high-temperature of 30.5°C (86.9°F), are warmest months in Majuro.

What is the temperature in September in Majuro?

In September, the average high-temperature is 30.5°C (86.9°F), and the average low-temperature is 25.5°C (77.9°F). In September, the average heat index (a.k.a. 'feels like', 'apparent temperature'), that takes the relative humidity and factores it into the air temperature reading, is estimated at 39°C (102.2°F).

What is the average humidity in September in Majuro?

In September, the average relative humidity is 79.4%.

How many days does it rain in September in Majuro?

In Majuro, Marshall Islands, during September, the rain falls for 22.9 days and regularly aggregates up to 308.4mm (12.1") of precipitation.

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

September and October, with an average sea temperature of 29.3°C (84.7°F), are months with the warmest seawater.

What is the sea water temperature in September in Majuro?

In September, the average sea temperature is 29.3°C (84.7°F). For any water activity, surface water temperatures between 25°C (77°F) and 29°C (84.2°F) are considered as excellent and extremely pleasant for lengthened periods.

How many hours of daylight does Majuro have in September?

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

How long on average sun shines in September in Majuro?

In Majuro, Marshall Islands, the average sunshine in September is 7.3h.

When is the highest UV index in Majuro?

January through October, with an average maximum UV index of 12, are months with the highest UV index in Majuro, Marshall Islands.

How high is the UV index in September in Majuro?

The average daily maximum UV index in September in Majuro 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 - Majuro, Marshall Islands
  • Average high temperature in September: 30.5°C

Warmest months (with the highest average high temperature) are September and October (30.5°C).
The month with the lowest average high temperature is January (29.7°C).

  • Average low temperature in September: 25.5°C

The month with the highest average low temperature is May (25.7°C).
Coldest months (with the lowest average low temperature) are January, July, October and December (25.4°C).

Average humidity in September - Majuro, Marshall Islands
  • Average humidity in September: 79.4%

The month with the highest relative humidity is May (81.9%).
The month with the lowest relative humidity is February (77.1%).

Average rainfall in September - Majuro, Marshall Islands
  • Average rainfall in September: 308.4mm

The wettest month (with the highest rainfall) is October (337.1mm).
The driest month (with the lowest rainfall) is March (191.8mm).

Average rainfall days in September - Majuro, Marshall Islands
  • Average rainfall days in September: 22.9 days

The month with the highest number of rainy days is July (24.3 days).
The month with the lowest number of rainy days is February (16.1 days).

Average sea temperature in September - Majuro, Marshall Islands
  • Average sea temperature in September: 29.3°C

Best months for swimming (with the highest average sea temperature) are September and October (29.3°C).
Coldest months (with the lowest average sea temperature) are February and March (28.3°C).

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

Months with the longest days are May, June and July (Average daylight: 12.5h).
The month with shortest days is December (Average daylight: 11.7h).

  • Average sunshine in September: 7.3h

The month with most sunshine is March (Average sunshine: 8.2h).
Months with least sunshine are November and December (Average sunshine: 6.4).

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

Months with the highest UV index are January, February, March, April, May, June, July, August, September and October (UV index 12).
Months with the lowest UV index are November and December (UV index 11).