Bethel
Alaska, USA
Long-term weather forecast
Long-term weather forecast

September weather forecast and climate
Bethel, AK

The first month of the autumn, September, is still a cool month in Bethel, Alaska, with average temperature varying between 51.6°F (10.9°C) and 39°F (3.9°C).

Temperature

In September, the average high-temperature slightly decreases, from a mild 59.7°F (15.4°C) in August, to a cool 51.6°F (10.9°C). In September, in Bethel, the average low-temperature is 39°F (3.9°C).

Rainfall

In Bethel, Alaska, during 17.2 rainfall days, 2.3" (58.7mm) of precipitation is typically accumulated. In Bethel, during the entire year, the rain falls for 142.3 days and collects up to 16.2" (410.9mm) of precipitation.

Snowfall

January through June, September through December are months with snowfall in Bethel.

Daylight

The average length of the day in September is 12.8h.

Sunshine

In Bethel, Alaska, the average sunshine in September is 6h.

UV index

In Bethel, the average daily maximum UV index is 2. A UV Index estimate of 2, and below, represents a low health risk from unsafe exposure to the UV radiation for ordinary individuals.
The average daily UV index of 2 in September transform into the following instructions:
Most people can stay in the Sun for up to 1 hour without burning, apart from children that always must be protected from sun exposure. The solar radiation is most powerful near the mid-day, so the exposure to the direct Sun should be reduced accordingly. 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. Caution! The reflection of snow can nearly double the intensity of the Sun's UV radiation.

What is the temperature in September in Bethel?

The average high-temperature, in September, in Bethel, Alaska, is 51.6°F (10.9°C), while the average low-temperature is 39°F (3.9°C).

How much does it rain in Bethel in September?

In Bethel, during September, the rain falls for 17.2 days and regularly aggregates up to 2.3" (58.7mm) of precipitation.

When does it start snowing in Bethel?

September is the first month it typically snows in Bethel, Alaska. Throughout September, in the average 0.5 snowfall days, it receives 0.3" (7.6mm) of snow.

How many hours of daylight does Bethel have in September?

The average length of the day in September in Bethel, Alaska, is 12.8h.

How many hours of sunshine does Bethel have in September?

In Bethel, Alaska, the average sunshine in September is 6h.

What is the UV index reading in September in Bethel?

In Bethel, Alaska, the average daily maximum UV index in September is 2. A UV Index of 2, and less, symbolizes a low health risk from unsafe exposure to the Sun's UV rays.
Average temperature in September - Bethel, AK
  • Average high temperature in September: 51.7°F

The warmest month (with the highest average high temperature) is July (63.1°F).
The month with the lowest average high temperature is January (12.4°F).

  • Average low temperature in September: 39.1°F

The month with the highest average low temperature is July (48.8°F).
The coldest month (with the lowest average low temperature) is January (0.7°F).

Average rainfall in September - Bethel, AK
  • Average rainfall in September: 2.3"

The wettest month (with the highest rainfall) is August (3").
The driest month (with the lowest rainfall) is February (0.5").

Average rainfall days in September - Bethel, AK
  • Average rainfall days in September: 17.2 days

The month with the highest number of rainy days is August (18.3 days).
The month with the lowest number of rainy days is February (5.8 days).

Average snowfall in September - Bethel, AK
  • Average snowfall in September: 0.3"

The month with the highest snowfall is December (9.5").
Months with the lowest snowfall are July and August (0").

Average snowfall days in September - Bethel, AK
  • Average snowfall days in September: 0.5 days

The month with the highest number of snowfall days is November (9.1 days).
Months with the lowest number of snowfall days are July and August (0 days).

Average daylight in September / Average sunshine in September - Bethel, AK
  • Average daylight in September: 12.8h

The month with the longest days is June (Average daylight: 19h).
The month with shortest days is December (Average daylight: 5.8h).

  • Average sunshine in September: 6h

Months with most sunshine are May and June (Average sunshine: 9h).
Months with least sunshine are January, November and December (Average sunshine: 3).

Average UV index in September - Bethel, AK
  • Average UV index in September: 2

Months with the highest UV index are June and July (UV index 5).
Months with the lowest UV index are January, February, November and December (UV index 0).