September weather forecast
Midway Atoll, Midway Island, USA

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Weather in September

Temperature in Midway Atoll in September reduces slightly ranging from 75°F (23.9°C) to 84°F (28.9°C). Although one would expect reduced precipitation, the rainfall volume remains steady at 3.5" (89mm). The reduced temperatures bring about a feel of the forthcoming Fall. Weather in September offers an escape from the persistent heat of July and August and signals the onset of cooler days.

Temperature

The warmest period in Midway Atoll falls in August and September, when the average high-temperature reaches 84°F (28.9°C).

Rainfall

In Midway Atoll, in September, it is raining for 15 days, with typically 3.5" (89mm) of accumulated precipitation. In Midway Atoll, during the entire year, the rain falls for 160 days and collects up to 41.3" (1049mm) of precipitation.

Ocean temperature

August and September, with an average ocean temperature of 80.6°F (27°C), are months with the warmest seawater.
Note: For swimming, diving, or other water activities, temperatures from 77°F (25°C) to 84.2°F (29°C) provide the most enjoyable experience for extended periods without discomfort.

Daylight

The average length of the day in September is 12h and 19min.
On the first day of the month, sunrise is at 6:28 am and sunset at 7:09 pm. On the last day of September, in Midway Atoll, sunrise is at 6:42 am and sunset at 6:35 pm SST.

Sunshine

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

UV index

In Midway Atoll, Midway Island, the average daily maximum UV index in September is 10. A UV Index estimate of 8 to 10 represents a very high health risk from exposure to the Sun's UV rays for ordinary individuals.
Note: In September, the UV index of 10 transforms into the following advice:
Being unprotected puts skin and eyes at risk of rapid damage. Always be safe. Attempt to stay under shade and limit exposure to the Sun between 10 a.m. and 4 p.m., when UV radiation is at its peak. Remember, devices such as parasols or canopies might not provide complete sun protection. A wide-brim hat offers excellent sun protection for the eyes, ears, face, and neck. Sunglasses with UVA and UVB protection significantly reduce eye damage from sun exposure. Even if the day is cloudy, sunscreen with SPF of at least 30 should be applied generously and reapplied often, particularly after swimming or outdoor exercise. Caution! The Sun's UV intensity grows with reflections off sand and water.
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Frequently asked questions

What time of the year is the hottest in Midway Atoll?

The peak of Midway Atoll's temperatures is noted during August and September, averaging a high-temperature of 84°F (28.9°C).

How hot is September in Midway Atoll?

The high-temperature, in September, in Midway Atoll, records 84°F (28.9°C), while the 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" (89mm) of precipitation is typically accumulated.

What are the months with the warmest ocean 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, the average seawater temperature in September 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?

The average day length in September in Midway Atoll, Midway Island, is 12h and 19min.

What time are sunrise and sunset in September in Midway Atoll?

In September, on the first day of the month, sunrise is at 6:28 am and sunset at 7:09 pm. On the last day of the month, in Midway Atoll, sunrise is at 6:42 am and sunset at 6:35 pm SST.

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

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

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

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

How high is the UV index in September in Midway Atoll?

The average daily maximum UV index in September in Midway Atoll is 10. A UV Index value of 8 to 10 symbolizes a very high health risk from exposure to Sun's UV rays.
Average rainfall days
Average daylight
Average sunshine
Average UV index

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).
The months with the lowest average high temperature are January and February (70°F).

  • Average low temperature in September: 75°F

The 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

The months with the highest number of rainy days are January and December (16 days).
The 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: 12h and 2min

The month with the longest days is June (Average daylight: 13h and 54min).
The month with the shortest days is December (Average daylight: 10h and 24min).

  • Average sunshine in September: 18h

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

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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

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

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Midway Atoll, Midway Island, USA

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