September weather forecastAmboy, WA
September
Weather in September
September, the first month of the autumn in Amboy, is still a pleasant month, with an average temperature fluctuating between 47.7°F (8.7°C) and 70.2°F (21.2°C).Temperature
In September, the average high-temperature marginally decreases from a moderately hot 77.7°F (25.4°C) in August to an agreeable 70.2°F (21.2°C). A striking departure from daytime highs to an average low-temperature of 47.7°F (8.7°C) is witnessed during September.Humidity
The average relative humidity in September in Amboy, Washington, is 74%.Rainfall
In September, the rain falls for 11.6 days. Throughout September, 2.32" (59mm) of precipitation is accumulated. In Amboy, during the entire year, the rain falls for 182.3 days and collects up to 48.11" (1222mm) of precipitation.Snowfall
April through October are months without snowfall in Amboy.Daylight
In Amboy, the average length of the day in September is 12h and 31min.On the first day of the month, sunrise is at 6:31 am and sunset at 7:47 pm. On the last day of September, in Amboy, sunrise is at 7:07 am and sunset at 6:51 pm PDT.
Sunshine
In Amboy, the average sunshine in September is 8.4h.UV index
In September, the average daily maximum UV index is 3. A UV Index value of 3 to 5 symbolizes a medium health hazard from unsafe exposure to UV radiation for the ordinary person.Note: The average daily UV index of 3 in September transforms into the following instructions:
Ensure safety - Sun damage prevention is strongly urged. The solar radiation around mid-day is intense; avoid the Sun and stay safe. A wide-brimmed hat is a shield, deflecting up to 50% of harmful UV radiation from eyes.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in September
Amboy, WA
- Average high temperature in September: 70.2°F
The warmest month (with the highest average high temperature) is August (77.7°F).
The month with the lowest average high temperature is December (40.6°F).
- Average low temperature in September: 47.7°F
The month with the highest average low temperature is August (50.5°F).
The coldest month (with the lowest average low temperature) is December (30.7°F).
Average pressure in September
Amboy, WA
- Average pressure in September: 30.01"Hg
The month with the highest atmospheric pressure is January (30.11"Hg).
The month with the lowest atmospheric pressure is August (30"Hg).
Average wind speed in September
Amboy, WA
- Average wind speed in September: 4.2mph
The windiest month (with the highest average wind speed) is January (6.1mph).
The calmest month (with the lowest average wind speed) is August (4.1mph).
Average humidity in September
Amboy, WA
- Average humidity in September: 74%
The month with the highest relative humidity is February (88%).
The months with the lowest relative humidity are July and August (69%).
Average rainfall in September
Amboy, WA
- Average rainfall in September: 2.32"
The wettest month (with the highest rainfall) is January (7.64").
The driest month (with the least rainfall) is July (0.43").
Average rainfall days in September
Amboy, WA
- Average rainfall days in September: 11.6 days
The month with the highest number of rainy days is March (20.8 days).
The month with the least rainy days is August (5.6 days).
Average snowfall in September
Amboy, WA
- Average snowfall in September: 0"
The month with the highest snowfall is February (4.02").
The months with the least snowfall are April, May, June, July, August, September and October (0").
Average snowfall days in September
Amboy, WA
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is February (4.2 days).
The months with the least snowfall days are May, June, July, August, September and October (0 days).
Average daylight in September /
Average sunshine in September
Amboy, WA
- Average daylight in September: 12h and 30min
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 24min
The month with the most sunshine is August (Average sunshine: 10h and 30min).
The month with the least sunshine is February (Average sunshine: 3h and 12min).
Average sunshine days in September
Amboy, WA
- Average sunshine days in September: 17.1 days
The month with the most sunshine days is August (23.4 days).
The month with the least sunshine days is February (8.1 days).
Average UV index in September
Amboy, WA
- Average UV index in September: 3
The months with the highest UV index are June and July (UV index 5).
The month with the lowest UV index is November (UV index 1).
Average cloud cover in September
Amboy, WA
- Average cloud cover in September: 41
The months with the most cloud cover are February and December (Cloud cover 66).
The month with the least cloud cover is August (Cloud cover 29).
Average visibility in September
Amboy, WA
- Average visibility in September: 5mi
The months with the highest visibility are June, July, August, September and October (5mi).
The months with the lowest visibility are January, February, March, April, May, November and December (4mi).
