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 notes an average high-temperature of a still comfortable 63.5°F (17.5°C), subtly differing from August's 65.5°F (18.6°C). In September, Arch Cape experiences a temperature dip to an average of 53.8°F (12.1°C) at night.Humidity
The average relative humidity in September is 82%.Rainfall
In Arch Cape, during September, the rain falls for 11 days and regularly aggregates up to 1.77" (45mm) of precipitation. Throughout the year, there are 185.6 rainfall days, and 39.8" (1011mm) of precipitation is accumulated.Snowfall
In Arch Cape, snow does not fall in April through November.Daylight
The average length of the day in September in Arch Cape is 12h and 31min.On the first day of September, sunrise is at 6:37 am and sunset at 7:53 pm. On the last day of the month, sunrise is at 7:14 am and sunset at 6:57 pm PDT.
Sunshine
In Arch Cape, the average sunshine in September is 8.8h.UV index
The months with the highest UV index 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 exposure to the Sun's UV radiation for average individuals.Note: A daily high UV index of 4 in September leads to these guidelines:
Undertake protective steps - Recommendations to avoid sunburn are issued. During midday, the Sun's radiation is strongest, and it's advisable to reduce direct exposure. In the presence of strong sunlight, it's crucial to wear sunglasses that ward off UVA and UVB rays.
Frequently asked questions
What are the temperatures in Arch Cape in September?
What is the average humidity in September in Arch Cape?
How much does it rain in Arch Cape in September?
When it does not snow in Arch Cape?
How many hours of daylight does Arch Cape have in September?
What time are sunrise and sunset in September in Arch Cape?
How long on average sun shines in September in Arch Cape?
What is the month with the highest UV index in Arch Cape?
What is the UV index reading in September in Arch Cape?
Average temperature in September
Arch Cape, OR
- Average high temperature in September: 63.5°F
The warmest month (with the highest average high temperature) is August (65.5°F).
The month with the lowest average high temperature is December (46.6°F).
- Average low temperature in September: 53.8°F
The month with the highest average low temperature is August (55°F).
The coldest month (with the lowest average low temperature) is December (40.5°F).
Average pressure in September
Arch Cape, OR
- Average pressure in September: 30.02"Hg
The month with the highest atmospheric pressure is January (30.08"Hg).
The months with the lowest atmospheric pressure are March and September (30.02"Hg).
Average wind speed in September
Arch Cape, OR
- Average wind speed in September: 7.2mph
The windiest month (with the highest average wind speed) is January (10.9mph).
The calmest month (with the lowest average wind speed) is August (6.3mph).
Average humidity in September
Arch Cape, OR
- Average humidity in September: 82%
The month with the highest relative humidity is August (84%).
The months with the lowest relative humidity are January, March, April, May, October and December (81%).
Average rainfall in September
Arch Cape, OR
- Average rainfall in September: 1.77"
The wettest month (with the highest rainfall) is December (6.54").
The driest months (with the least rainfall) are July and August (0.47").
Average rainfall days in September
Arch Cape, OR
- Average rainfall days in September: 11 days
The month with the highest number of rainy days is March (20.8 days).
The months with the least rainy days are July and August (7.3 days).
Average snowfall in September
Arch Cape, OR
- Average snowfall in September: 0"
The month with the highest snowfall is February (0.59").
The months with the least snowfall are April, May, June, July, August, September, October and November (0").
Average snowfall days in September
Arch Cape, OR
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is February (1.3 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
Arch Cape, OR
- Average daylight in September: 12h and 3min
The month with the longest days is June (Average daylight: 15h and 42min).
The month with the shortest days is December (Average daylight: 8h and 42min).
- Average sunshine in September: 8h and 5min
The month with the most sunshine is August (Average sunshine: 10h and 0min).
The months with the least sunshine are January and February (Average sunshine: 3h and 54min).
Average sunshine days in September
Arch Cape, OR
- Average sunshine days in September: 17 days
The month with the most sunshine days is August (21.2 days).
The month with the least sunshine days is February (7.5 days).
Average UV index in September
Arch Cape, OR
- 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 February, November and December (UV index 2).
Average cloud cover in September
Arch Cape, OR
- Average cloud cover in September: 36
The months with the most cloud cover are January and February (Cloud cover 59).
The month with the least cloud cover is August (Cloud cover 35).
Average visibility in September
Arch Cape, OR
- 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).
Arch Cape, Oregon, USA
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