Midway Atoll
Midway Island, USA
Long-term weather forecast
Long-term weather forecast

September weather forecast and climate
Midway Atoll, Midway Island, USA

The first month of the autumn, September, is also a moderately hot month in Midway Atoll, Midway Island, with average temperature ranging between max 84°F (28.9°C) and min 75°F (23.9°C).

Temperature

The warmest months are August and September, with an average high-temperature of 84°F (28.9°C).

Rainfall

In September, in Midway Atoll, the rain falls for 15 days. Throughout September, 3.5" (88.9mm) of precipitation is accumulated. In Midway Atoll, during the entire year, the rain falls for 160 days and collects up to 41.3" (1048.9mm) of precipitation.

Ocean temperature

Months with the warmest seawater in Midway Atoll are August and September, with an average ocean temperature of 80.6°F (27°C).
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 Midway Atoll, Midway Island, the average length of the day is 12.3h.

Sunshine

Months with the most sunshine in Midway Atoll, Midway Island, are July, September and October, with an average of 18h of sunshine.

UV index

In September, the average daily maximum UV index is 10. A UV Index estimate of 8 to 10 represents a very high health vulnerability from the exposure to the Sun's UV rays for average individuals.
Note: The daily maximum UV index of 10 in September interpret into the following advice:
Take extra precautions. Fair-skinned individuals may get burned in less than 10 minutes. 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. 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 strength of the UV rays is significantly increased by the reflection of the water and sand.

What are the warmest months in Midway Atoll?

August and September, with an average high-temperature of 84°F (28.9°C), are warmest months in Midway Atoll.

What is the temperature in September in Midway Atoll?

In September, the average high-temperature is 84°F (28.9°C), and the average low-temperature is 75°F (23.9°C).

How many days does it rain in September in Midway Atoll?

In Midway Atoll, Midway Island, in September, it is raining for 15 days, with typically 3.5" (88.9mm) of accumulated precipitation.

What months are the ocean warmest in Midway Atoll?

August and September, with an average ocean temperature of 80.6°F (27°C), are months with the warmest seawater in Midway Atoll, Midway Island.

How warm is the water in September in Midway Atoll?

In Midway Atoll, in September, the average water temperature is 80.6°F (27°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 Midway Atoll?

In September, the average length of the day in Midway Atoll is 12.3h.

What is the month with the most sunshine in Midway Atoll?

July, September and October, with an average of 18h of sunshine, are months with the most sunshine in Midway Atoll.

How many hours of sunshine does Midway Atoll have in September?

The average sunshine in September in Midway Atoll, Midway Island, is 18h.

What is the UV index intensity in September in Midway Atoll?

The average daily maximum UV index in September in Midway Atoll, Midway Island, is 10. A UV Index of 8 to 10 symbolizes a very high health threat from the exposure to the Sun's UV radiation.
Average temperature in September - Midway Atoll, Midway Island, USA
  • Average high temperature in September: 84°F

Warmest months (with the highest average high temperature) are August and September (84°F).
Months with the lowest average high temperature are January and February (70°F).

  • Average low temperature in September: 75°F

Months with the highest average low temperature are July, August and September (75°F).
Coldest months (with the lowest average low temperature) are January and February (62°F).

Average rainfall in September - Midway Atoll, Midway Island, USA
  • Average rainfall in September: 3.5"

The wettest month (with the highest rainfall) is January (5").
The driest month (with the lowest rainfall) is June (2.2").

Average rainfall days in September - Midway Atoll, Midway Island, USA
  • Average rainfall days in September: 15 days

Months with the highest number of rainy days are January and December (16 days).
Months with the lowest number of rainy days are May and June (9 days).

Average sea temperature in September - Midway Atoll, Midway Island, USA
  • Average sea temperature in September: 81°F

Best months for swimming (with the highest average sea temperature) are August and September (81°F).
Coldest months (with the lowest average sea temperature) are January, February and March (68°F).

Average daylight in September / Average sunshine in September - Midway Atoll, Midway Island, USA
  • Average daylight in September: 12.3h

The month with the longest days is June (Average daylight: 13.9h).
The month with shortest days is December (Average daylight: 10.4h).

  • Average sunshine in September: 18h

Months with most sunshine are July, September and October (Average sunshine: 18h).
Months with least sunshine are January and February (Average sunshine: 14).

Average UV index in September - Midway Atoll, Midway Island, USA
  • Average UV index in September: 10

Months with the highest UV index are June, July and August (UV index 11).
Months with the lowest UV index are January and December (UV index 5).