September weather forecast and climate
Moses Lake, WA

Weather in September

September, the first month of the autumn, in Moses Lake, is still a warm month, with average temperature varying between 75.9°F (24.4°C) and 55.2°F (12.9°C).

Temperature

In Moses Lake, the average high-temperature drops, from a hot 86.9°F (30.5°C) in August, to a warm 75.9°F (24.4°C). In September, the average low-temperature is 55.2°F (12.9°C).

Humidity

In September, the average relative humidity in Moses Lake is 44%.

Rainfall

In September, in Moses Lake, the rain falls for 5.4 days. Throughout September, 0.31" (8mm) of precipitation is accumulated. In Moses Lake, Washington, during the entire year, the rain falls for 103.1 days and collects up to 7.8" (198mm) of precipitation.

Snowfall

Months with snowfall in Moses Lake are January through April, September, November and December. September is the first month it typically snows in Moses Lake. Throughout September, in the average 0.1 snowfall days, it receives 0.04" (1mm) of snow. Throughout the year, there are 20.9 snowfall days, and 8.07" (205mm) of snow is accumulated.

Daylight

In September, the average length of the day in Moses Lake is 12.5h.

Sunshine

In September, the average sunshine is 10.8h.

UV index

In Moses Lake, Washington, the average daily maximum UV index in September is 4. A UV Index of 3 to 5 symbolizes a medium health hazard from unsafe exposure to the UV radiation for average individuals.
Note: The daily maximum UV index of 4 interpret into the following advice:
Take precautions - Protection against the skin and eye damage is obliged. 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.
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FAQ

What is the average humidity in September in Moses Lake?

In Moses Lake, the average relative humidity in September is 44%.

How many days does it rain in September in Moses Lake?

In Moses Lake, Washington, in September, during 5.4 rainfall days, 0.31" (8mm) of precipitation is typically accumulated.

When does it start to snow in Moses Lake?

September is the first month it typically snows in Moses Lake, Washington. Throughout September, in the average 0.1 snowfall days, it receives 0.04" (1mm) of snow.

How many hours of daylight does Moses Lake have in September?

In Moses Lake, the average length of the day in September is 12.5h.

How many hours of sunshine does Moses Lake have in September?

In September, the average sunshine is 10.8h.

What is the UV index intensity in September in Moses Lake?

In September, the average daily maximum UV index is 4. A UV Index of 3 to 5 symbolizes a moderate vulnerability from unprotected exposure to the UV radiation.

Average temperature in September
Moses Lake, WA

Average temperature in September - Moses Lake, WA
  • Average high temperature in September: 75.9°F

The warmest month (with the highest average high temperature) is July (87.6°F).
The month with the lowest average high temperature is December (34°F).

  • Average low temperature in September: 55.2°F

The month with the highest average low temperature is August (62.2°F).
The coldest month (with the lowest average low temperature) is December (23.9°F).

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Average pressure in September
Moses Lake, WA

Average pressure in September - Moses Lake, WA
  • Average pressure in September: 29.95"

The month with the highest atmospheric pressure is January (30.17").
The month with the lowest atmospheric pressure is August (29.91").

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Average wind speed in September
Moses Lake, WA

Average wind speed in September - Moses Lake, WA
  • Average wind speed in September: 6.3mph

The windiest month (with the highest average wind speed) is April (7.9mph).
The calmest months (with the lowest average wind speed) are January and December (5.5mph).

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Average humidity in September
Moses Lake, WA

Average humidity in September - Moses Lake, WA
  • Average humidity in September: 44%

The month with the highest relative humidity is January (85%).
Months with the lowest relative humidity are July and August (36%).

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Average rainfall in September
Moses Lake, WA

Average rainfall in September - Moses Lake, WA
  • Average rainfall in September: 0.31"

The wettest month (with the highest rainfall) is January (1.02").
The driest month (with the least rainfall) is August (0.2").

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Average rainfall days in September
Moses Lake, WA

Average rainfall days in September - Moses Lake, WA
  • Average rainfall days in September: 5.4 days

The month with the highest number of rainy days is March (12.8 days).
The month with the least rainy days is July (3.8 days).

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Average snowfall in September
Moses Lake, WA

Average snowfall in September - Moses Lake, WA
  • Average snowfall in September: 0.04"

The month with the highest snowfall is December (2.6").
Months with the least snowfall are May, June, July, August and October (0").

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Average snowfall days in September
Moses Lake, WA

Average snowfall days in September - Moses Lake, WA
  • Average snowfall days in September: 0.1 days

The month with the highest number of snowfall days is December (6.8 days).
Months with the least snowfall days are May, June, July, August and October (0 days).

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Average daylight in September /
Average sunshine in September
Moses Lake, WA

Average daylight in September / Average sunshine in September - Moses Lake, WA
  • Average daylight in September: 12.5h

The month with the longest days is June (Average daylight: 15.9h).
The month with the shortest days is December (Average daylight: 8.6h).

  • Average sunshine in September: 10.8h

Months with the most sunshine are July and August (Average sunshine: 12h).
The month with the least sunshine is January (Average sunshine: 4.9h).

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Average sunshine days in September
Moses Lake, WA

Average sunshine days in September - Moses Lake, WA
  • Average sunshine days in September: 23.4 days

The month with the most sunshine days is July (25.8 days).
The month with the least sunshine days is March (14.2 days).

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Average UV index in September
Moses Lake, WA

Average UV index in September - Moses Lake, WA
  • Average UV index in September: 4

The month with the highest UV index is July (UV index 7).
Months with the lowest UV index are January, February, November and December (UV index 2).

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Average cloud cover in September
Moses Lake, WA

Average cloud cover in September - Moses Lake, WA
  • Average cloud cover in September: 16

The month with the most cloud cover is January (Cloud cover 49).
Months with the least cloud cover are July and August (Cloud cover 11).

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Average visibility in September
Moses Lake, WA

Average visibility in September - Moses Lake, WA
  • Average visibility in September: 6mi

Months with the highest visibility are February, March, April, May, June, July, August, September, October and November (6mi).
Months with the lowest visibility are January and December (5mi).

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