September weather forecastBonners Ferry, ID
September
Weather in September
The first month of the autumn, September, is still a refreshing month in Bonners Ferry, Idaho, with temperature in the range of an average low of 39.9°F (4.4°C) and an average high of 65.8°F (18.8°C).Temperature
Bonners Ferry's weather changes with the onset of September, slightly falling from a warm 76.3°F (24.6°C) in August to a refreshing 65.8°F (18.8°C). A marked drop from daytime peak temperatures to an average low-temperature of 39.9°F (4.4°C) is observed during the nights in September in Bonners Ferry.Humidity
The average relative humidity in September is 64%.Rainfall
In Bonners Ferry, in September, it is raining for 9.5 days, with typically 0.87" (22mm) of accumulated precipitation. Throughout the year, there are 157.1 rainfall days, and 21.61" (549mm) of precipitation is accumulated.Snowfall
January through April, September through December are months with snowfall. September is the first month it typically snows in Bonners Ferry. Throughout September, in the average 0.3 snowfall days, it receives 0.51" (13mm) of snow. In Bonners Ferry, Idaho, during the entire year, snow falls for 70.6 days and aggregates up to 41.77" (1061mm) of snow.Daylight
In Bonners Ferry, the average length of the day in September is 12h and 34min.On the first day of September in Bonners Ferry, sunrise is at 6:03 am and sunset at 7:26 pm. On the last day of the month, sunrise is at 6:44 am and sunset at 6:25 pm PDT.
Sunshine
In September, the average sunshine is 9.7h.UV index
In September, the average daily maximum UV index in Bonners Ferry, Idaho, is 3. A UV Index of 3 to 5 symbolizes a medium vulnerability from unprotected exposure to Sun's UV rays for average individuals.Note: A daily high UV index of 3 in September leads to these guidelines:
Take necessary precautions - Protection from skin and eye injury is mandatory. The Sun's radiation is especially intense around midday; try to stay in shade during this period. In the presence of strong sunlight, it's crucial to wear sunglasses that ward off UVA and UVB rays. Alert! The snow's reflection can amplify the UV radiation of the Sun nearly twice.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in September
Bonners Ferry, ID
- Average high temperature in September: 65.8°F
The warmest month (with the highest average high temperature) is August (76.3°F).
The month with the lowest average high temperature is December (27.3°F).
- Average low temperature in September: 39.9°F
The month with the highest average low temperature is August (47.7°F).
The coldest months (with the lowest average low temperature) are January and December (16.3°F).
Average pressure in September
Bonners Ferry, ID
- Average pressure in September: 29.98"Hg
The month with the highest atmospheric pressure is January (30.19"Hg).
The month with the lowest atmospheric pressure is June (29.91"Hg).
Average wind speed in September
Bonners Ferry, ID
- Average wind speed in September: 3.7mph
The windiest month (with the highest average wind speed) is June (4.3mph).
The calmest month (with the lowest average wind speed) is December (3.5mph).
Average humidity in September
Bonners Ferry, ID
- Average humidity in September: 64%
The month with the highest relative humidity is January (94%).
The month with the lowest relative humidity is August (55%).
Average rainfall in September
Bonners Ferry, ID
- Average rainfall in September: 0.87"
The wettest month (with the highest rainfall) is December (2.76").
The driest month (with the least rainfall) is August (0.43").
Average rainfall days in September
Bonners Ferry, ID
- Average rainfall days in September: 9.5 days
The month with the highest number of rainy days is April (19.7 days).
The month with the least rainy days is August (6.5 days).
Average snowfall in September
Bonners Ferry, ID
- Average snowfall in September: 0.51"
The month with the highest snowfall is January (11.02").
The months with the least snowfall are May, June, July and August (0").
Average snowfall days in September
Bonners Ferry, ID
- Average snowfall days in September: 0.3 days
The month with the highest number of snowfall days is December (17.4 days).
The months with the least snowfall days are May, June, July and August (0 days).
Average daylight in September /
Average sunshine in September
Bonners Ferry, ID
- 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 42min
The month with the most sunshine is August (Average sunshine: 11h and 54min).
The month with the least sunshine is January (Average sunshine: 3h and 48min).
Average sunshine days in September
Bonners Ferry, ID
- Average sunshine days in September: 18 days
The month with the most sunshine days is August (21.8 days).
The month with the least sunshine days is March (7.7 days).
Average UV index in September
Bonners Ferry, 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
Bonners Ferry, ID
- Average cloud cover in September: 25
The month with the most cloud cover is January (Cloud cover 62).
The month with the least cloud cover is August (Cloud cover 15).
Average visibility in September
Bonners Ferry, ID
- Average visibility in September: 6mi
The months with the highest visibility are May, June, July, August and September (6mi).
The month with the lowest visibility is January (2mi).
