September weather forecastRockport, WA
September
Weather in September
September, the first month of the autumn in Rockport, is also an enjoyable month, with an average temperature fluctuating between 62.8°F (17.1°C) and 39.7°F (4.3°C).Temperature
The onset of September aligns with a soft reduction in the average high-temperature, gently falling from a pleasant 71.2°F (21.8°C) in August to a refreshing 62.8°F (17.1°C). Compared to daytime temperatures, Rockport's temperature drops significantly, averaging a wintry 39.7°F (4.3°C) during the nights of September.Humidity
In September, the average relative humidity in Rockport is 75%.Rainfall
In Rockport, in September, during 14 rainfall days, 2.4" (61mm) of precipitation is typically accumulated. In Rockport, during the entire year, the rain falls for 124 days and collects up to 55.28" (1404mm) of precipitation.Snowfall
Months with snowfall in Rockport are January through June, September through December. September is the first month it typically snows in Rockport. Throughout September, in the average 1.4 snowfall days, it receives 1.3" (33mm) of snow. Throughout the year, in Rockport, there are 142 snowfall days, and 321.93" (8177mm) of snow is accumulated.Daylight
In September, the average length of the day is 12h and 34min.On the first day of September in Rockport, sunrise is at 6:24 am and sunset at 7:47 pm. On the last day of the month, sunrise is at 7:05 am and sunset at 6:46 pm PDT.
Sunshine
In Rockport, Washington, the average sunshine in September is 9.1h.UV index
In September, the average daily maximum UV index is 2. A UV Index reading of 2, and below, represents a low threat to health from unprotected exposure to Sun's UV rays for the average person.Note: A maximum high daily UV index of 2 during September translates into the following directions:
While many people can endure lengthy sun exposure, it remains imperative to safeguard babies, children, and fair-skinned individuals. The Sun is most powerful around mid-day, so it's a good practice to reduce direct exposure. Boost your sun resistance with garments that are densely woven yet spacious. Notice this! Nearly double the intensity of the Sun's UV radiation can be caused by snow reflection.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in September
Rockport, WA
- Average high temperature in September: 62.8°F
The warmest month (with the highest average high temperature) is August (71.2°F).
The month with the lowest average high temperature is December (30.7°F).
- Average low temperature in September: 39.7°F
The month with the highest average low temperature is August (43.7°F).
The coldest month (with the lowest average low temperature) is December (19.6°F).
Average pressure in September
Rockport, WA
- Average pressure in September: 30"Hg
The month with the highest atmospheric pressure is January (30.12"Hg).
The months with the lowest atmospheric pressure are June and August (29.98"Hg).
Average wind speed in September
Rockport, WA
- Average wind speed in September: 3.4mph
The windiest month (with the highest average wind speed) is January (4.7mph).
The calmest month (with the lowest average wind speed) is August (3.3mph).
Average humidity in September
Rockport, WA
- Average humidity in September: 75%
The months with the highest relative humidity are January, February and March (91%).
The months with the lowest relative humidity are July and August (71%).
Average rainfall in September
Rockport, WA
- Average rainfall in September: 2.4"
The wettest month (with the highest rainfall) is January (9.25").
The driest month (with the least rainfall) is August (0.87").
Average rainfall days in September
Rockport, WA
- Average rainfall days in September: 14 days
The month with the highest number of rainy days is June (17.5 days).
The month with the least rainy days is February (3.8 days).
Average snowfall in September
Rockport, WA
- Average snowfall in September: 1.3"
The month with the highest snowfall is January (71.57").
The months with the least snowfall are July and August (0").
Average snowfall days in September
Rockport, WA
- Average snowfall days in September: 1.4 days
The month with the highest number of snowfall days is March (22.8 days).
The month with the least snowfall days is August (0 days).
Average daylight in September /
Average sunshine in September
Rockport, WA
- Average daylight in September: 12h and 36min
The month with the longest days is June (Average daylight: 16h and 6min).
The month with the shortest days is December (Average daylight: 8h and 24min).
- Average sunshine in September: 9h and 6min
The month with the most sunshine is August (Average sunshine: 10h and 54min).
The month with the least sunshine is January (Average sunshine: 3h and 42min).
Average sunshine days in September
Rockport, WA
- Average sunshine days in September: 13.1 days
The month with the most sunshine days is August (18.1 days).
The month with the least sunshine days is April (6.5 days).
Average UV index in September
Rockport, WA
- Average UV index in September: 2
The month with the highest UV index is July (UV index 5).
The months with the lowest UV index are January, February, October and November (UV index 1).
Average cloud cover in September
Rockport, WA
- Average cloud cover in September: 39
The month with the most cloud cover is March (Cloud cover 63).
The month with the least cloud cover is August (Cloud cover 30).
Average visibility in September
Rockport, WA
- Average visibility in September: 5mi
The months with the highest visibility are June, July, August and September (5mi).
The months with the lowest visibility are January and March (3mi).
