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
The transition into September involves a decrease in the average high-temperature, falling from a moderately hot 81.1°F (27.3°C) in August to a pleasant 70.7°F (21.5°C). Featherville registers a marked temperature plunge to a frosty 49.1°F (9.5°C) during the cool September nights.Humidity
In Featherville, the average relative humidity in September is 41%.Rainfall
In Featherville, in September, during 7.5 rainfall days, 0.75" (19mm) of precipitation is typically accumulated. Throughout the year, in Featherville, there are 116.2 rainfall days, and 21.3" (541mm) of precipitation is accumulated.Snowfall
July through September are months without snowfall.Daylight
In September, the average length of the day is 12h and 29min.On the first day of September, sunrise is at 7:05 am and sunset at 8:15 pm. On the last day of the month, sunrise is at 7:38 am and sunset at 7:23 pm MDT.
Sunshine
In Featherville, the average sunshine in September is 9.5h.UV index
The average daily maximum UV index in September in Featherville is 4. A UV Index value of 3 to 5 symbolizes a moderate health risk from exposure to the Sun's UV radiation for ordinary individuals.Note: The maximum daily UV index of 4 in September converts into the following recommendations:
Preventative actions are necessary - The mandate to avoid skin and eye damage is in place. The Sun's harshest UV rays are around midday; it's wise to seek shade and limit time outdoors. Sunglasses providing both UVA and UVB protection are non-negotiable on sunlit days. Note well! The intensity of the Sun's UV rays can be nearly doubled by snow reflection.
Frequently asked questions
What is the temperature in September in Featherville?
What is the average humidity in September in Featherville?
How many days does it rain in September in Featherville?
When it does not snow in Featherville?
Does it snow in Featherville in September?
How many hours of daylight does Featherville have in September?
What time are sunrise and sunset in September in Featherville?
How long on average sun shines in September in Featherville?
How high is the UV index in September in Featherville?
Average temperature in September
Featherville, ID
- Average high temperature in September: 70.7°F
The warmest month (with the highest average high temperature) is July (82.6°F).
The month with the lowest average high temperature is December (29.7°F).
- Average low temperature in September: 49.1°F
The month with the highest average low temperature is August (56.5°F).
The coldest month (with the lowest average low temperature) is December (16.7°F).
Average pressure in September
Featherville, ID
- Average pressure in September: 29.94"Hg
The month with the highest atmospheric pressure is January (30.27"Hg).
The month with the lowest atmospheric pressure is June (29.88"Hg).
Average wind speed in September
Featherville, ID
- Average wind speed in September: 5.8mph
The windiest month (with the highest average wind speed) is April (7mph).
The calmest month (with the lowest average wind speed) is January (5.3mph).
Average humidity in September
Featherville, ID
- Average humidity in September: 41%
The month with the highest relative humidity is February (86%).
The month with the lowest relative humidity is July (33%).
Average rainfall in September
Featherville, ID
- Average rainfall in September: 0.75"
The wettest month (with the highest rainfall) is February (3.07").
The driest month (with the least rainfall) is July (0.39").
Average rainfall days in September
Featherville, ID
- Average rainfall days in September: 7.5 days
The months with the highest number of rainy days are March and April (14.9 days).
The month with the least rainy days is July (5.3 days).
Average snowfall in September
Featherville, ID
- Average snowfall in September: 0"
The month with the highest snowfall is January (20.2").
The months with the least snowfall are July, August and September (0").
Average snowfall days in September
Featherville, ID
- Average snowfall days in September: 0.1 days
The month with the highest number of snowfall days is January (15 days).
The months with the least snowfall days are July and August (0 days).
Average daylight in September /
Average sunshine in September
Featherville, ID
- Average daylight in September: 12h and 3min
The month with the longest days is June (Average daylight: 15h and 24min).
The month with the shortest days is December (Average daylight: 9h and 0min).
- Average sunshine in September: 9h and 3min
The month with the most sunshine is July (Average sunshine: 12h and 6min).
The month with the least sunshine is January (Average sunshine: 5h and 18min).
Average sunshine days in September
Featherville, ID
- Average sunshine days in September: 21 days
The month with the most sunshine days is July (22.7 days).
The month with the least sunshine days is March (10.9 days).
Average UV index in September
Featherville, 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, February, March, April, October, November and December (UV index 2).
Average cloud cover in September
Featherville, ID
- Average cloud cover in September: 15
The month with the most cloud cover is February (Cloud cover 45).
The months with the least cloud cover are July and August (Cloud cover 9).
Average visibility in September
Featherville, ID
- Average visibility in September: 6mi
The months with the highest visibility are March, April, May, June, July, August, September, October and November (6mi).
The months with the lowest visibility are January, February and December (5mi).
Featherville, Idaho, USA
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