September weather forecast
Peshastin, WA

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Weather in September

The first month of the autumn, September, is still a refreshing month in Peshastin, Washington, with an average temperature fluctuating between 66.4°F (19.1°C) and 43.2°F (6.2°C).

Temperature

In Peshastin, entering September brings a temperature decrement, reducing from August's warm 77.5°F (25.3°C) to a comfortable 66.4°F (19.1°C). In the face of high daytime temperatures, Peshastin witnesses a consistent average nighttime low of 43.2°F (6.2°C) during September.

Humidity

In September, the average relative humidity is 65%.

Rainfall

In Peshastin, in September, during 10.3 rainfall days, 1.06" (27mm) of precipitation is typically accumulated. Throughout the year, there are 159.9 rainfall days, and 25.63" (651mm) of precipitation is accumulated.

Snowfall

Months with snowfall in Peshastin are January through May, September through December. September is the first month it typically snows. Throughout September, in the average 0.2 snowfall days, it receives 0.39" (10mm) of snow. Throughout the year, there are 73.4 snowfall days, and 57.99" (1473mm) of snow is accumulated.

Daylight

In Peshastin, the average length of the day in September is 12h and 33min.
On the first day of September in Peshastin, sunrise is at 6:22 am and sunset at 7:42 pm. On the last day of the month, sunrise is at 7:01 am and sunset at 6:43 pm PDT.

Sunshine

In September, the average sunshine is 10.5h.

UV index

In September, the average daily maximum UV index is 3. A UV Index value of 3 to 5 symbolizes a medium vulnerability from unsafe exposure to UV radiation for the ordinary person.
Note: The UV index of 3 during September translates into the following guidance:
Exercise prevention - Protecting skin and eyes from harm is required. The most potent solar radiation is around mid-day, so one should minimize exposure to direct sunlight during this period. Prioritize a wide-brim hat for comprehensive sun defense for your face, neck, eyes, and ears. Be mindful! The reflection from snow can increase the Sun's UV radiation nearly twice.
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Frequently asked questions

What is the temperature in September in Peshastin?

In Peshastin, 66.4°F (19.1°C) is the average high-temperature and 43.2°F (6.2°C) is the average low-temperature during September.

What is the average humidity in September in Peshastin?

The average relative humidity in September in Peshastin is 65%.

How much does it rain in Peshastin in September?

In Peshastin, Washington, in September, during 10.3 rainfall days, 1.06" (27mm) of precipitation is typically accumulated.

When does it start snowing in Peshastin?

September is the first month it typically snows in Peshastin, Washington. Throughout September, in the average 0.2 snowfall days, it receives 0.39" (10mm) of snow.

How many hours of daylight does Peshastin have in September?

The average day length in September in Peshastin, Washington, is 12h and 33min.

When is the sunrise / sunset in September in Peshastin?

In September, on the first day of the month, sunrise is at 6:22 am and sunset at 7:42 pm. On the last day of the month, sunrise is at 7:01 am and sunset at 6:43 pm PDT.

How long on average sun shines in September in Peshastin?

The average sunshine duration in September is 10.5h.

What is the UV index reading in September in Peshastin?

The average daily maximum UV index in September in Peshastin, Washington, is 3. A UV Index reading of 3 to 5 represents a moderate vulnerability from exposure to the Sun's UV radiation.
Average humidity
Average rainfall days
Average snowfall days
Average daylight
Average sunshine
Average sunshine days
Average UV index
Average cloud cover
Average visibility

Average temperature in September
Peshastin, WA

Average temperature in September - Peshastin, WA
  • Average high temperature in September: 66.4°F

The warmest month (with the highest average high temperature) is August (77.5°F).
The month with the lowest average high temperature is December (30.6°F).

  • Average low temperature in September: 43.2°F

The month with the highest average low temperature is August (49.6°F).
The coldest month (with the lowest average low temperature) is December (18.7°F).

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Average pressure in September
Peshastin, WA

Average pressure in September - Peshastin, WA
  • Average pressure in September: 29.98"Hg

The month with the highest atmospheric pressure is January (30.14"Hg).
The month with the lowest atmospheric pressure is August (29.95"Hg).

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Average wind speed in September
Peshastin, WA

Average wind speed in September - Peshastin, WA
  • Average wind speed in September: 4.7mph

The windiest month (with the highest average wind speed) is June (5.7mph).
The calmest month (with the lowest average wind speed) is December (3.5mph).

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Average humidity in September
Peshastin, WA

Average humidity in September - Peshastin, WA
  • Average humidity in September: 65%

The month with the highest relative humidity is January (92%).
The months with the lowest relative humidity are July and August (56%).

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Average rainfall in September
Peshastin, WA

Average rainfall in September - Peshastin, WA
  • Average rainfall in September: 1.06"

The wettest month (with the highest rainfall) is January (4.33").
The driest month (with the least rainfall) is July (0.43").

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Average rainfall days in September
Peshastin, WA

Average rainfall days in September - Peshastin, WA
  • Average rainfall days in September: 10.3 days

The month with the highest number of rainy days is March (18.2 days).
The month with the least rainy days is August (6.3 days).

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Average snowfall in September
Peshastin, WA

Average snowfall in September - Peshastin, WA
  • Average snowfall in September: 0.39"

The month with the highest snowfall is January (16.73").
The months with the least snowfall are June, July and August (0").

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Average snowfall days in September
Peshastin, WA

Average snowfall days in September - Peshastin, WA
  • Average snowfall days in September: 0.2 days

The month with the highest number of snowfall days is December (17 days).
The months with the least snowfall days are June, July and August (0 days).

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Average daylight in September /
Average sunshine in September
Peshastin, WA

Average daylight in September / Average sunshine in September - Peshastin, WA
  • Average daylight in September: 12h and 3min

The month with the longest days is June (Average daylight: 15h and 54min).
The month with the shortest days is December (Average daylight: 8h and 30min).

  • Average sunshine in September: 10h and 3min

The month with the most sunshine is August (Average sunshine: 11h and 54min).
The month with the least sunshine is January (Average sunshine: 4h and 6min).

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Average sunshine days in September
Peshastin, WA

Average sunshine days in September - Peshastin, WA
  • Average sunshine days in September: 16.5 days

The month with the most sunshine days is August (21.9 days).
The month with the least sunshine days is February (6.8 days).

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Average UV index in September
Peshastin, WA

Average UV index in September - Peshastin, WA
  • Average UV index in September: 3

The month with the highest UV index is July (UV index 6).
The months with the lowest UV index are January and February (UV index 1).

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Average cloud cover in September
Peshastin, WA

Average cloud cover in September - Peshastin, WA
  • Average cloud cover in September: 25

The month with the most cloud cover is January (Cloud cover 56).
The month with the least cloud cover is August (Cloud cover 15).

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Average visibility in September
Peshastin, WA

Average visibility in September - Peshastin, WA
  • Average visibility in September: 6mi

The months with the highest visibility are April, May, June, July, August, September and October (6mi).
The months with the lowest visibility are January, February, March, November and December (4mi).

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Peshastin, Washington, USA

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