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 still a warm month in Midway Atoll, Midway Island, with average temperature fluctuating between 84°F (28.9°C) and 75°F (23.9°C).

Temperature

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

Rainfall

In Midway Atoll, during September, the rain falls for 15 days and regularly aggregates up to 3.5" (88.9mm) of precipitation. Throughout the year, in Midway Atoll, 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.
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

In Midway Atoll, 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.

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 risk from the exposure to the Sun's UV radiation for the average person.
Note: The daily maximum UV index of 10 interpret into the following advice:
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 strength of the UV rays is significantly increased by the reflection of the water and sand.

What is the warmest month in Midway Atoll?

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

What is the temperature in September in Midway Atoll?

In September, in Midway Atoll, 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 September, the rain falls for 15 days. Throughout September, 3.5" (88.9mm) of precipitation is accumulated.

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

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

What is the water temperature in September in Midway Atoll?

In September, the average ocean temperature in Midway Atoll, Midway Island, 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 Midway Atoll, Midway Island, the average length of the day in September 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.

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 reading in September in Midway Atoll?

The average daily maximum UV index in September in Midway Atoll is 10. A UV Index reading of 8 to 10 represents a very high health vulnerability from unsafe exposure to the Sun's UV rays.
Average temperature in September - Midway Atoll, Midway Island, USA
  • Average high temperature in September: 28.9°C

Warmest months (with the highest average high temperature) are August and September (28.9°C).
Months with the lowest average high temperature are January and February (21.1°C).

  • Average low temperature in September: 23.9°C

Months with the highest average low temperature are July, August and September (23.9°C).
Coldest months (with the lowest average low temperature) are January and February (16.7°C).

Average rainfall in September - Midway Atoll, Midway Island, USA
  • Average rainfall in September: 88.9mm

The wettest month (with the highest rainfall) is January (127mm).
The driest month (with the lowest rainfall) is June (55.9mm).

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: 27°C

Best months for swimming (with the highest average sea temperature) are August and September (27°C).
Coldest months (with the lowest average sea temperature) are January, February and March (20°C).

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).