Contents
- Weather in September
- Frequently asked questions
- Average temperature in September
- Average pressure in September
- Average wind speed in September
- Average humidity in September
- Average rainfall in September
- Average rainfall days in September
- Average snowfall in September
- Average snowfall days in September
- Average daylight in September
- Average sunshine in September
- Average sunshine days in September
- Average UV index in September
- Average cloud cover in September
- Average visibility in September
Weather in September
Temperature
The onset of September introduces a moderate change in Washtucna's weather, with average high-temperatures falling from August's 85.1°F (29.5°C) to a still moderately hot 74.3°F (23.5°C). The nighttime temperature dips to a moderate 56.3°F (13.5°C) on average during September.Humidity
In Washtucna, the average relative humidity in September is 42%.Rainfall
In Washtucna, during September, the rain falls for 6.6 days and regularly aggregates up to 0.39" (10mm) of precipitation. Throughout the year, in Washtucna, there are 109 rainfall days, and 10.59" (269mm) of precipitation is accumulated.Snowfall
January through April, September through December are months with snowfall. September is the first month it typically snows. Throughout September, in the average 0.1 snowfall days, it receives 0.04" (1mm) of snow. In Washtucna, Washington, during the entire year, snow falls for 28.2 days and aggregates up to 12.48" (317mm) of snow.Daylight
The average length of the day in September in Washtucna is 12h and 32min.On the first day of September, sunrise is at 6:14 am and sunset at 7:31 pm. On the last day of the month, sunrise is at 6:51 am and sunset at 6:34 pm PDT.
Sunshine
The average sunshine in September is 10.5h.UV index
The average daily maximum UV index in September in Washtucna is 4. A UV Index reading of 3 to 5 represents a moderate health risk from unprotected exposure to Sun's UV rays for average individuals.Note: In September, a regular UV index of 4 translates into these guidelines:
Prioritize safety - Suggestions to prevent sun damage are offered. During midday, the Sun's radiation is strongest, and it's advisable to reduce direct exposure. Select sunglasses that boast both UVA and UVB protection to limit the adverse effects of the sun on the eyes. Notice this! Nearly double the intensity of the Sun's UV radiation can be caused by snow reflection.
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Data Sources | Weather Forecasting & Climate
Frequently asked questions
What is the average September temperature in Washtucna?
What is the average humidity in September in Washtucna?
How much does it rain in Washtucna in September?
When does it start to snow in Washtucna?
What is the average length of the day in September in Washtucna?
What time are sunrise and sunset in September in Washtucna?
How long on average sun shines in September in Washtucna?
How high is the UV index in September in Washtucna?
Average temperature in September
Washtucna, WA
- Average high temperature in September: 74.3°F
The warmest month (with the highest average high temperature) is July (85.6°F).
The month with the lowest average high temperature is December (33.8°F).
- Average low temperature in September: 56.3°F
The month with the highest average low temperature is August (64.6°F).
The coldest month (with the lowest average low temperature) is December (25.2°F).
Average pressure in September
Washtucna, WA
- Average pressure in September: 29.95"Hg
The month with the highest atmospheric pressure is January (30.19"Hg).
The month with the lowest atmospheric pressure is August (29.9"Hg).
Average wind speed in September
Washtucna, WA
- Average wind speed in September: 8mph
The windiest month (with the highest average wind speed) is March (9.8mph).
The calmest month (with the lowest average wind speed) is August (7.3mph).
Average humidity in September
Washtucna, WA
- Average humidity in September: 42%
The month with the highest relative humidity is January (85%).
The month with the lowest relative humidity is August (34%).
Average rainfall in September
Washtucna, WA
- Average rainfall in September: 0.39"
The wettest month (with the highest rainfall) is March (1.38").
The driest months (with the least rainfall) are July and August (0.31").
Average rainfall days in September
Washtucna, WA
- Average rainfall days in September: 6.6 days
The month with the highest number of rainy days is March (13.6 days).
The month with the least rainy days is July (4.2 days).
Average snowfall in September
Washtucna, WA
- Average snowfall in September: 0.04"
The month with the highest snowfall is February (3.54").
The months with the least snowfall are May, June, July and August (0").
Average snowfall days in September
Washtucna, WA
- Average snowfall days in September: 0.1 days
The month with the highest number of snowfall days is December (7.8 days).
The months with the least snowfall days are May, June, July and August (0 days).
Average daylight in September /
Average sunshine in September
Washtucna, WA
- Average daylight in September: 12h and 3min
The month with the longest days is June (Average daylight: 15h and 48min).
The month with the shortest days is December (Average daylight: 8h and 36min).
- Average sunshine in September: 10h and 3min
The months with the most sunshine are July and August (Average sunshine: 12h and 0min).
The month with the least sunshine is December (Average sunshine: 4h and 36min).
Average sunshine days in September
Washtucna, WA
- Average sunshine days in September: 21.9 days
The month with the most sunshine days is July (25.3 days).
The month with the least sunshine days is March (14.2 days).
Average UV index in September
Washtucna, WA
- Average UV index in September: 4
The month with the highest UV index is July (UV index 7).
The months with the lowest UV index are January, February, November and December (UV index 2).
Average cloud cover in September
Washtucna, WA
- Average cloud cover in September: 18
The month with the most cloud cover is January (Cloud cover 52).
The month with the least cloud cover is July (Cloud cover 11).
Average visibility in September
Washtucna, WA
- Average visibility in September: 6mi
The months with the highest visibility are February, March, April, May, June, July, August, September, October, November and December (6mi).
The month with the lowest visibility is January (5mi).
Washtucna, Washington, USA
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