September weather forecastArbon, ID
September
Weather in September
The first month of the autumn, September, is also an agreeable month in Arbon, Idaho, with an average temperature fluctuating between 73°F (22.8°C) and 49.5°F (9.7°C).Temperature
Arrival of September comes with a reduction in the average high-temperature, falling from a warm 83.7°F (28.7°C) in August to a pleasant 73°F (22.8°C). Throughout September nights, a significant departure from daytime temperatures, with an average low of 49.5°F (9.7°C), is recognized.Humidity
In September, the average relative humidity in Arbon is 42%.Rainfall
In Arbon, Idaho, in September, it is raining for 8.6 days, with typically 1.18" (30mm) of accumulated precipitation. Throughout the year, in Arbon, there are 118.3 rainfall days, and 16.42" (417mm) of precipitation is accumulated.Snowfall
January through May, 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 0.35" (9mm) of snow. Throughout the year, there are 68.7 snowfall days, and 48.82" (1240mm) of snow is accumulated.Daylight
The average length of the day in September is 12h and 28min.On the first day of September, sunrise is at 6:56 am and sunset at 8:03 pm. On the last day of the month, sunrise is at 7:27 am and sunset at 7:12 pm MDT.
Sunshine
In September, the average sunshine is 9.8h.UV index
In Arbon, the average daily maximum UV index in September is 4. A UV Index value of 3 to 5 symbolizes a medium health hazard from unsafe exposure to UV radiation for the average person.Note: The maximum daily UV index, 4 in September, converts into the following recommendations:
Act with care - Obligation to protect against skin and eye damage is highlighted. Stay safe from the Sun's strongest UV rays by limiting exposure during midday. Enhance your sun protection with tightly woven, yet airy clothing. Attention! Nearly twice the Sun's UV radiation can be reflected by snow.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in September
Arbon, ID
- Average high temperature in September: 73°F
The warmest month (with the highest average high temperature) is July (84.9°F).
The month with the lowest average high temperature is December (28.9°F).
- Average low temperature in September: 49.5°F
The month with the highest average low temperature is July (56.3°F).
The coldest month (with the lowest average low temperature) is January (15.3°F).
Average pressure in September
Arbon, ID
- Average pressure in September: 29.96"Hg
The month with the highest atmospheric pressure is January (30.3"Hg).
The month with the lowest atmospheric pressure is June (29.89"Hg).
Average wind speed in September
Arbon, ID
- Average wind speed in September: 6mph
The windiest month (with the highest average wind speed) is April (6.8mph).
The calmest month (with the lowest average wind speed) is January (4.8mph).
Average humidity in September
Arbon, ID
- Average humidity in September: 42%
The month with the highest relative humidity is January (89%).
The month with the lowest relative humidity is August (35%).
Average rainfall in September
Arbon, ID
- Average rainfall in September: 1.18"
The wettest month (with the highest rainfall) is February (2.05").
The driest month (with the least rainfall) is July (0.55").
Average rainfall days in September
Arbon, ID
- Average rainfall days in September: 8.6 days
The month with the highest number of rainy days is May (15.9 days).
The month with the least rainy days is January (6.6 days).
Average snowfall in September
Arbon, ID
- Average snowfall in September: 0.35"
The month with the highest snowfall is January (13.78").
The months with the least snowfall are June, July and August (0").
Average snowfall days in September
Arbon, ID
- Average snowfall days in September: 0.1 days
The month with the highest number of snowfall days is January (15.8 days).
The months with the least snowfall days are June, July and August (0 days).
Average daylight in September /
Average sunshine in September
Arbon, ID
- Average daylight in September: 12h and 30min
The month with the longest days is June (Average daylight: 15h and 12min).
The month with the shortest days is December (Average daylight: 9h and 6min).
- Average sunshine in September: 9h and 48min
The months with the most sunshine are July and August (Average sunshine: 11h and 54min).
The month with the least sunshine is January (Average sunshine: 4h and 42min).
Average sunshine days in September
Arbon, ID
- Average sunshine days in September: 18.6 days
The month with the most sunshine days is October (19.4 days).
The month with the least sunshine days is February (9.9 days).
Average UV index in September
Arbon, ID
- Average UV index in September: 4
The month with the highest UV index is July (UV index 6).
The month with the lowest UV index is January (UV index 1).
Average cloud cover in September
Arbon, ID
- Average cloud cover in September: 15
The month with the most cloud cover is February (Cloud cover 52).
The months with the least cloud cover are July and August (Cloud cover 11).
Average visibility in September
Arbon, ID
- Average visibility in September: 6mi
The months with the highest visibility are April, May, June, July, August, September, October and November (6mi).
The months with the lowest visibility are January, February and December (4mi).
