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

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

September, the first month of the autumn, in Midway Atoll, is also a moderately hot month, with average temperature ranging between min 75°F (23.9°C) and max 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, during September, the rain falls for 15 days and regularly aggregates up to 3.5" (88.9mm) of precipitation. In Midway Atoll, Midway Island, during the entire year, the rain falls for 160 days and collects up to 41.3" (1048.9mm) of precipitation.

Ocean temperature

August and September, with an average ocean temperature of 80.6°F (27°C), are months with the warmest seawater. 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, 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 Midway Atoll, the average daily maximum UV index in September is 10. A UV Index reading of 8 to 10 represents a very high health risk from unsafe exposure to the UV radiation for average individuals.
The average daily UV index of 10 in September transform into the following instructions:
Take extra precautions. Fair-skinned individuals may get burned in less than 10 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. 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. Caution! The reflection of sand and water significantly increases the intensity of the Sun's UV radiation.

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.

What is the temperature in September in Midway Atoll?

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

When is 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. 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.

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). 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.

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

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

What are the months 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, Midway Island.

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

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

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

The average daily maximum UV index in September in Midway Atoll, Midway Island, is 10. A UV Index estimate of 8 to 10 represents a very high hazard to health from unprotected exposure to the 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).