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

Weather in September

September, the first month of the autumn, in Midway Atoll, is also a moderately hot month, with temperature in the range of an average low of 75°F (23.9°C) and an average high of 84°F (28.9°C).

Temperature

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

Rainfall

In Midway Atoll, Midway Island, in September, during 15 rainfall days, 3.5" (88.9mm) of precipitation is typically accumulated. Throughout the year, there are 160 rainfall days, and 41.3" (1048.9mm) of precipitation is accumulated.

Ocean temperature

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

Daylight

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

Sunshine

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

UV index

In September, the average daily maximum UV index is 10. A UV Index estimate of 8 to 10 represents a very high threat to health from unsafe exposure to the UV radiation for ordinary individuals.
Note: The average daily UV index of 10 transform into the following instructions:
Take special precautions, as unprotected eyes and skin can be burned and damaged quickly. 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. A wide-brim hat offers excellent sun protection for eyes, ears, face, and neck. Sunglasses with UVA and UVB protection significantly reduce eye damage from sun exposure. Tightly woven, loose-fitting clothes provide additional protection from the Sun. 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. Beware! The reflection of water and sand dramatically increases exposure to the UV rays.
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FAQ

What is the warmest month in Midway Atoll?

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

What is the temperature in September in Midway Atoll?

The average high-temperature, in September, is 84°F (28.9°C), while the average low-temperature is 75°F (23.9°C).

How much does it rain in Midway Atoll in September?

In Midway Atoll, in September, during 15 rainfall days, 3.5" (88.9mm) of precipitation is typically accumulated.

What are the months with the warmest ocean in Midway Atoll?

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

How warm is the water in September in Midway Atoll?

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

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

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

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

How long on average sun shines in September in Midway Atoll?

In September, the average sunshine in Midway Atoll is 18h.

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

In September, the average daily maximum UV index in Midway Atoll is 10. A UV Index estimate of 8 to 10 represents a very high health risk from unsafe exposure to the Sun's UV rays.

Average temperature in September
Midway Atoll, Midway Island, USA

Average temperature in September - Midway Atoll, Midway Island, USA
  • Average high temperature in September: 84°F

The 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).
The coldest months (with the lowest average low temperature) are January and February (62°F).

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Average rainfall in September
Midway Atoll, Midway Island, USA

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 least rainfall) is June (2.2").

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Average rainfall days in September
Midway Atoll, Midway Island, USA

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 least rainy days are May and June (9 days).

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Average sea temperature in September
Midway Atoll, Midway Island, USA

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

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

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Average daylight in September /
Average sunshine in September
Midway Atoll, Midway Island, USA

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 the shortest days is December (Average daylight: 10.4h).

  • Average sunshine in September: 18h

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

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Average UV index in September
Midway Atoll, Midway Island, USA

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).

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