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
Silverton's progression into September includes a drop in the average high-temperature, from a warm 78.4°F (25.8°C) in August to a refreshing 67.8°F (19.9°C). Silverton observes a noteworthy temperature drop from the daily highs during September nights, with a mean temperature of 40.8°F (4.9°C).Humidity
In September, the average relative humidity is 63%.Rainfall
In September, the rain falls for 9.1 days. Throughout September, 0.94" (24mm) of precipitation is accumulated. In Silverton, during the entire year, the rain falls for 128.7 days and collects up to 24.65" (626mm) of precipitation.Snowfall
January through May, September through December are months with snowfall in Silverton. September is the first month it typically snows in Silverton. Throughout September, in the average 0.2 snowfall days, it receives 0.2" (5mm) of snow. In Silverton, Idaho, during the entire year, snow falls for 74.7 days and aggregates up to 63.27" (1607mm) of snow.Daylight
In September, the average length of the day in Silverton is 12h and 33min.On the first day of September, sunrise is at 6:03 am and sunset at 7:23 pm. On the last day of the month, sunrise is at 6:42 am and sunset at 6:24 pm PDT.
Sunshine
In September, the average sunshine in Silverton is 9.2h.UV index
In Silverton, the average daily maximum UV index in September is 3. A UV Index reading of 3 to 5 represents a medium health hazard from exposure to the Sun's UV rays for the average person.Note: A maximum high daily UV index of 3 during September translates into the following directions:
Heed the precautions - It is counselled to guard against solar damage. Considering the strength of solar radiation at midday, one should avoid direct Sun exposure. Sunglasses that ward off UVA and UVB rays play a pivotal role in reducing solar eye damage. Keep in mind! Snow's reflective quality can nearly double the intensity of the Sun's UV radiation.
Frequently asked questions
What is the temperature in September in Silverton?
What is the average humidity in September in Silverton?
How many days does it rain in September in Silverton?
When does it start snowing in Silverton?
What is the average length of the day in September in Silverton?
When is the sunrise / sunset in September in Silverton?
How many hours of sunshine does Silverton have in September?
How high is the UV index in September in Silverton?
Average temperature in September
Silverton, ID
- Average high temperature in September: 67.8°F
The warmest month (with the highest average high temperature) is August (78.4°F).
The month with the lowest average high temperature is December (30°F).
- Average low temperature in September: 40.8°F
The month with the highest average low temperature is August (47.8°F).
The coldest month (with the lowest average low temperature) is December (19.2°F).
Average pressure in September
Silverton, ID
- Average pressure in September: 29.97"Hg
The month with the highest atmospheric pressure is January (30.19"Hg).
The months with the lowest atmospheric pressure are June and August (29.93"Hg).
Average wind speed in September
Silverton, ID
- Average wind speed in September: 4.2mph
The windiest month (with the highest average wind speed) is April (4.9mph).
The calmest months (with the lowest average wind speed) are September and December (4.2mph).
Average humidity in September
Silverton, ID
- Average humidity in September: 63%
The month with the highest relative humidity is January (92%).
The months with the lowest relative humidity are July and August (53%).
Average rainfall in September
Silverton, ID
- Average rainfall in September: 0.94"
The wettest month (with the highest rainfall) is January (3.07").
The driest month (with the least rainfall) is July (0.51").
Average rainfall days in September
Silverton, ID
- Average rainfall days in September: 9.1 days
The month with the highest number of rainy days is April (17.3 days).
The month with the least rainy days is July (6 days).
Average snowfall in September
Silverton, ID
- Average snowfall in September: 0.2"
The month with the highest snowfall is January (16.5").
The months with the least snowfall are June, July and August (0").
Average snowfall days in September
Silverton, ID
- Average snowfall days in September: 0.2 days
The month with the highest number of snowfall days is December (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
Silverton, ID
- Average daylight in September: 12h and 3min
The month with the longest days is June (Average daylight: 15h and 54min).
The month with the shortest days is December (Average daylight: 8h and 30min).
- Average sunshine in September: 9h and 1min
The month with the most sunshine is August (Average sunshine: 11h and 42min).
The month with the least sunshine is December (Average sunshine: 3h and 12min).
Average sunshine days in September
Silverton, ID
- Average sunshine days in September: 19.5 days
The month with the most sunshine days is July (23.7 days).
The month with the least sunshine days is March (9.3 days).
Average UV index in September
Silverton, ID
- Average UV index in September: 3
The month with the highest UV index is July (UV index 5).
The months with the lowest UV index are January, February, November and December (UV index 1).
Average cloud cover in September
Silverton, ID
- Average cloud cover in September: 27
The months with the most cloud cover are January, February and December (Cloud cover 67).
The months with the least cloud cover are July and August (Cloud cover 16).
Average visibility in September
Silverton, ID
- Average visibility in September: 6mi
The months with the highest visibility are June, July, August and September (6mi).
The months with the lowest visibility are January, February and December (3mi).
Silverton, Idaho, USA
Weather forecast for your location
2. Allow the app to use your location
