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 beginning of September marks a decrease in the average high-temperature, transitioning from a warm 85.3°F (29.6°C) in August to a still moderately hot 74.3°F (23.5°C). Throughout September, Fort Hall registers a distinct decrease from daytime highs, reaching an average low of 51.1°F (10.6°C).Humidity
The average relative humidity in September is 38%.Rainfall
In September, the rain falls for 7.5 days. Throughout September, 0.63" (16mm) of precipitation is accumulated. In Fort Hall, during the entire year, the rain falls for 116.1 days and collects up to 11.26" (286mm) of precipitation.Snowfall
January through May, September through December are months with snowfall. September is the first month it typically snows in Fort Hall. Throughout September, in the average 0.1 snowfall days, it receives 0.35" (9mm) of snow. In Fort Hall, during the entire year, snow falls for 70.2 days and aggregates up to 31.61" (803mm) of snow.Daylight
The average length of the day in September in Fort Hall, Idaho, is 12h and 29min.On the first day of the month, sunrise is at 6:55 am and sunset at 8:03 pm. On the last day of September, in Fort Hall, Idaho, sunrise is at 7:26 am and sunset at 7:12 pm MDT.
Sunshine
The average sunshine in September is 9.9h.UV index
The average daily maximum UV index in September in Fort Hall is 4. 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: The UV index of 4 during September leads to these advisories:
Heed the precautions - Protecting the skin and eyes from damage is compulsory. Direct exposure to the Sun during its peak hours around mid-day should be minimized for safety. Sun protection is enhanced with clothing that boasts a tight weave yet offers a loose fit. Guard yourself! Snow reflection can almost double the UV radiation from the Sun.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What is the average September temperature in Fort Hall?
What is the average humidity in September in Fort Hall?
How many days does it rain in September in Fort Hall?
When does it start to snow in Fort Hall?
What is the average length of the day in September in Fort Hall?
When is the sunrise / sunset in September in Fort Hall?
How many hours of sunshine does Fort Hall have in September?
How high is the UV index in September in Fort Hall?
Average temperature in September
Fort Hall, ID
- Average high temperature in September: 74.3°F
The warmest month (with the highest average high temperature) is July (86.5°F).
The month with the lowest average high temperature is December (29.7°F).
- Average low temperature in September: 51.1°F
The month with the highest average low temperature is August (57.4°F).
The coldest months (with the lowest average low temperature) are January and December (17.8°F).
Average pressure in September
Fort Hall, 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
Fort Hall, ID
- Average wind speed in September: 7.6mph
The windiest month (with the highest average wind speed) is April (9.4mph).
The calmest month (with the lowest average wind speed) is January (6.9mph).
Average humidity in September
Fort Hall, ID
- Average humidity in September: 38%
The month with the highest relative humidity is January (85%).
The month with the lowest relative humidity is August (33%).
Average rainfall in September
Fort Hall, ID
- Average rainfall in September: 0.63"
The wettest month (with the highest rainfall) is March (1.46").
The driest month (with the least rainfall) is July (0.39").
Average rainfall days in September
Fort Hall, ID
- Average rainfall days in September: 7.5 days
The month with the highest number of rainy days is March (15.1 days).
The month with the least rainy days is July (6.3 days).
Average snowfall in September
Fort Hall, ID
- Average snowfall in September: 0.35"
The month with the highest snowfall is January (8.27").
The months with the least snowfall are June, July and August (0").
Average snowfall days in September
Fort Hall, ID
- Average snowfall days in September: 0.1 days
The month with the highest number of snowfall days is February (15.9 days).
The months with the least snowfall days are July and August (0 days).
Average daylight in September /
Average sunshine in September
Fort Hall, ID
- Average daylight in September: 12h and 3min
The month with the longest days is June (Average daylight: 15h and 18min).
The month with the shortest days is December (Average daylight: 9h and 6min).
- Average sunshine in September: 9h and 5min
The month with the most sunshine is July (Average sunshine: 11h and 54min).
The month with the least sunshine is January (Average sunshine: 5h and 12min).
Average sunshine days in September
Fort Hall, ID
- Average sunshine days in September: 19.6 days
The month with the most sunshine days is October (20.1 days).
The month with the least sunshine days is February (9.6 days).
Average UV index in September
Fort Hall, ID
- Average UV index in September: 4
The months with the highest UV index are June and July (UV index 6).
The month with the lowest UV index is December (UV index 1).
Average cloud cover in September
Fort Hall, ID
- Average cloud cover in September: 14
The month with the most cloud cover is February (Cloud cover 47).
The months with the least cloud cover are July and August (Cloud cover 11).
Average visibility in September
Fort Hall, 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).
Fort Hall, Idaho, USA
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