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
September's arrival brings an average high-temperature of a still enjoyable 63.7°F (17.6°C), slightly deviating from August's 65.8°F (18.8°C). Throughout the month of September, Copalis Crossing reports a steady low-temperature average of 52.7°F (11.5°C).Humidity
The average relative humidity in September in Copalis Crossing is 83%.Rainfall
In September, in Copalis Crossing, the rain falls for 10.6 days. Throughout September, 1.02" (26mm) of precipitation is accumulated. In Copalis Crossing, during the entire year, the rain falls for 152.8 days and collects up to 19.41" (493mm) of precipitation.Snowfall
In Copalis Crossing, snow does not fall in April through October and December.Daylight
In Copalis Crossing, Washington, the average length of the day in September is 12h and 32min.On the first day of September in Copalis Crossing, sunrise is at 6:36 am and sunset at 7:55 pm. On the last day of the month, sunrise is at 7:14 am and sunset at 6:57 pm PDT.
Sunshine
The average sunshine in September in Copalis Crossing is 8.4h.UV index
The months with the highest UV index in Copalis Crossing are May through September, with an average maximum UV index of 4. A UV Index estimate of 3 to 5 represents a moderate health risk from unprotected exposure to Sun's UV rays for average individuals.Note: A maximum daily UV index of 4 during September morphs into the following directions:
Act with care - The suggestion to avoid sunburn is emphasized. The intensity of the Sun's UV radiation during midday suggests reducing time spent outdoors. Arm yourself against UV rays' harm with protective apparel and UV-filtering shades.
Frequently asked questions
What is the average September temperature in Copalis Crossing?
What is the average humidity in September in Copalis Crossing?
How many days does it rain in September in Copalis Crossing?
When it does not snow in Copalis Crossing?
What is the average length of the day in September in Copalis Crossing?
When are sunrise and sunset in September in Copalis Crossing?
How long on average sun shines in September in Copalis Crossing?
What is the month with the highest UV index in Copalis Crossing?
What is the UV index reading in September in Copalis Crossing?
Average temperature in September
Copalis Crossing, WA
- Average high temperature in September: 63.7°F
The warmest month (with the highest average high temperature) is August (65.8°F).
The month with the lowest average high temperature is December (45.5°F).
- Average low temperature in September: 52.7°F
The month with the highest average low temperature is August (54.5°F).
The coldest month (with the lowest average low temperature) is December (39.7°F).
Average pressure in September
Copalis Crossing, WA
- Average pressure in September: 30.02"Hg
The month with the highest atmospheric pressure is July (30.08"Hg).
The month with the lowest atmospheric pressure is March (30"Hg).
Average wind speed in September
Copalis Crossing, WA
- Average wind speed in September: 7.1mph
The windiest month (with the highest average wind speed) is January (10.9mph).
The calmest month (with the lowest average wind speed) is September (7.1mph).
Average humidity in September
Copalis Crossing, WA
- Average humidity in September: 83%
The month with the highest relative humidity is December (85%).
The months with the lowest relative humidity are April, May and June (81%).
Average rainfall in September
Copalis Crossing, WA
- Average rainfall in September: 1.02"
The wettest month (with the highest rainfall) is December (3.35").
The driest month (with the least rainfall) is July (0.24").
Average rainfall days in September
Copalis Crossing, WA
- Average rainfall days in September: 10.6 days
The month with the highest number of rainy days is December (18.5 days).
The month with the least rainy days is July (5.6 days).
Average snowfall in September
Copalis Crossing, WA
- Average snowfall in September: 0"
The month with the highest snowfall is February (1.02").
The months with the least snowfall are April, May, June, July, August, September, October and December (0").
Average snowfall days in September
Copalis Crossing, WA
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is February (1.6 days).
The months with the least snowfall days are April, May, June, July, August, September and October (0 days).
Average daylight in September /
Average sunshine in September
Copalis Crossing, 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: 8h and 2min
The month with the most sunshine is July (Average sunshine: 10h and 0min).
The month with the least sunshine is January (Average sunshine: 3h and 30min).
Average sunshine days in September
Copalis Crossing, WA
- Average sunshine days in September: 17.3 days
The month with the most sunshine days is July (23.8 days).
The month with the least sunshine days is December (10.7 days).
Average UV index in September
Copalis Crossing, WA
- Average UV index in September: 4
The months with the highest UV index are May, June, July, August and September (UV index 4).
The months with the lowest UV index are January, February, November and December (UV index 2).
Average cloud cover in September
Copalis Crossing, WA
- Average cloud cover in September: 39
The month with the most cloud cover is January (Cloud cover 63).
The month with the least cloud cover is July (Cloud cover 33).
Average visibility in September
Copalis Crossing, WA
- Average visibility in September: 6mi
The months with the highest visibility are January, February, March, April, May, June, July, September, October, November and December (6mi).
The month with the lowest visibility is August (5mi).
Copalis Crossing, Washington, USA
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