September weather forecastFranklin, ID
September
Weather in September
September, the first month of the autumn in Franklin, is also an agreeable month, with an average temperature ranging between min 46.6°F (8.1°C) and max 72.5°F (22.5°C).Temperature
In September, the average high-temperature goes from a moderately hot 82.9°F (28.3°C) in August to a pleasant 72.5°F (22.5°C). Nightly readings in September display a noticeable downturn from daily highs in Franklin, with the average low-temperature registering a chilly 46.6°F (8.1°C).Humidity
In September, the average relative humidity in Franklin is 45%.Rainfall
In Franklin, in September, during 7.5 rainfall days, 1.14" (29mm) of precipitation is typically accumulated. In Franklin, during the entire year, the rain falls for 127.4 days and collects up to 18.27" (464mm) of precipitation.Snowfall
Months with snowfall in Franklin, Idaho, are January through May, September through December. September is the first month it typically snows. Throughout September, in the average 0.1 snowfall days, it receives 0.35" (9mm) of snow. In Franklin, during the entire year, snow falls for 83.8 days and aggregates up to 60.12" (1527mm) of snow.Daylight
In Franklin, the average length of the day in September is 12h and 28min.On the first day of September, sunrise is at 6:53 am and sunset at 8:00 pm. On the last day of the month, sunrise is at 7:23 am and sunset at 7:09 pm MDT.
Sunshine
In September, the average sunshine is 10h.UV index
The average daily maximum UV index in September in Franklin is 4. A UV Index reading of 3 to 5 represents a moderate threat to health from unsafe exposure to UV radiation for average individuals.Note: A typical high UV index of 4 in September suggests the following recommendations:
Preventative actions are necessary - Recommendations to ward off sunburn are given. The intensity of the Sun's UV radiation during midday suggests reducing time spent outdoors. Using UVA and UVB-protective sunglasses and sun-protective clothing is effective against UV radiation. Be cautious! The UV radiation from the Sun can be magnified almost twofold by snow reflection.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in September
Franklin, ID
- Average high temperature in September: 72.5°F
The warmest month (with the highest average high temperature) is July (84.4°F).
The month with the lowest average high temperature is December (28.8°F).
- Average low temperature in September: 46.6°F
The month with the highest average low temperature is July (53.8°F).
The coldest month (with the lowest average low temperature) is January (13.5°F).
Average pressure in September
Franklin, 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
Franklin, ID
- Average wind speed in September: 5.4mph
The windiest month (with the highest average wind speed) is April (5.8mph).
The calmest month (with the lowest average wind speed) is January (4.2mph).
Average humidity in September
Franklin, ID
- Average humidity in September: 45%
The month with the highest relative humidity is January (90%).
The month with the lowest relative humidity is August (38%).
Average rainfall in September
Franklin, ID
- Average rainfall in September: 1.14"
The wettest month (with the highest rainfall) is February (2.24").
The driest month (with the least rainfall) is July (0.35").
Average rainfall days in September
Franklin, ID
- Average rainfall days in September: 7.5 days
The month with the highest number of rainy days is April (16.6 days).
The month with the least rainy days is July (5.5 days).
Average snowfall in September
Franklin, ID
- Average snowfall in September: 0.35"
The month with the highest snowfall is January (16.73").
The months with the least snowfall are June, July and August (0").
Average snowfall days in September
Franklin, ID
- Average snowfall days in September: 0.1 days
The months with the highest number of snowfall days are January and February (17.6 days).
The months with the least snowfall days are June, July and August (0 days).
Average daylight in September /
Average sunshine in September
Franklin, 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 12min).
- Average sunshine in September: 10h and 0min
The month with the most sunshine is July (Average sunshine: 12h and 0min).
The month with the least sunshine is January (Average sunshine: 4h and 48min).
Average sunshine days in September
Franklin, ID
- Average sunshine days in September: 18.8 days
The month with the most sunshine days is July (21.8 days).
The month with the least sunshine days is February (8.3 days).
Average UV index in September
Franklin, ID
- Average UV index in September: 4
The month with the highest UV index is July (UV index 6).
The months with the lowest UV index are January and December (UV index 1).
Average cloud cover in September
Franklin, ID
- Average cloud cover in September: 15
The month with the most cloud cover is February (Cloud cover 51).
The months with the least cloud cover are July and August (Cloud cover 10).
Average visibility in September
Franklin, 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).
