September weather forecastMidway Atoll, Midway Island, USA

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 months of August and September bring the highest temperatures, averaging a high of 84°F (28.9°C).

Rainfall

In Midway Atoll, in September, during 15 rainfall days, 3.5" (89mm) of precipitation is typically accumulated. 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: Water temperatures from 77°F (25°C) to 84.2°F (29°C) make swimming, diving, and similar activities highly pleasurable and enjoyable for long periods without discomfort.

Daylight

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

Sunshine

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

UV index

In Midway Atoll, the average daily maximum UV index in September is 10. A UV Index of 8 to 10 symbolizes a very high threat to health from unprotected exposure to Sun's UV rays for the average person.
Note: The daily high UV index of 10 during September translates into the following recommendations:
Always prioritize safety measures. Rapid harm can befall unprotected skin and eyes. Avoid direct Sun exposure and seek shade between 10 a.m. and 4 p.m., when UV radiation is at its peak, but keep in mind that not all shade structures provide complete protection. For excellent sun protection for the eyes, ears, face, and neck, consider a wide-brim hat. Directly after outdoor activities or swimming, a broad-spectrum sunscreen with SPF 30+ should be applied generously and reapplied frequently. Alert! UV radiation becomes sharper due to reflections from sand and water.