September weather forecastSaint Anthony, ID
September
Weather in September
September, the first month of the autumn in Saint Anthony, is also an agreeable month, with temperature in the range of an average high of 72.5°F (22.5°C) and an average low of 47.1°F (8.4°C).Temperature
As September begins, there is a decrease in the average high-temperature, falling from a warm 82.9°F (28.3°C) in August to an agreeable 72.5°F (22.5°C). Saint Anthony documents a striking divergence from daytime highs, with an average nighttime temperature of 47.1°F (8.4°C) in September.Humidity
In Saint Anthony, the average relative humidity in September is 44%.Rainfall
In Saint Anthony, Idaho, in September, during 7.1 rainfall days, 0.87" (22mm) of precipitation is typically accumulated. In Saint Anthony, during the entire year, the rain falls for 97.5 days and collects up to 11.85" (301mm) of precipitation.Snowfall
January through May, September through December are months with snowfall. September is the first month it typically snows in Saint Anthony. Throughout September, in the average 0.2 snowfall days, it receives 0.04" (1mm) of snow. In Saint Anthony, during the entire year, snow falls for 83.8 days and aggregates up to 41.93" (1065mm) of snow.Daylight
In Saint Anthony, the average length of the day in September is 12h and 29min.On the first day of September in Saint Anthony, sunrise is at 6:51 am and sunset at 8:01 pm. On the last day of the month, sunrise is at 7:24 am and sunset at 7:08 pm MDT.
Sunshine
In Saint Anthony, the average sunshine in September is 10h.UV index
In Saint Anthony, the average daily maximum UV index in September is 4. A UV Index reading of 3 to 5 represents a medium vulnerability from unprotected exposure to Sun's UV rays for ordinary individuals.Note: In September, the maximum UV index of 4 suggests these recommendations:
Guard yourself - Avoiding sunburn is suggested. The Sun's most harmful UV rays are emitted around midday; avoid staying outdoors for long during this time. Wearing a wide-brim hat can block approximately 50% of UV radiation, protecting the eyes. Be aware! The reflective nature of snow can magnify the Sun's UV radiation almost twofold.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in September
Saint Anthony, ID
- Average high temperature in September: 72.5°F
The warmest month (with the highest average high temperature) is July (83.7°F).
The month with the lowest average high temperature is December (26.2°F).
- Average low temperature in September: 47.1°F
The month with the highest average low temperature is August (52.5°F).
The coldest month (with the lowest average low temperature) is January (12.4°F).
Average pressure in September
Saint Anthony, ID
- Average pressure in September: 29.99"Hg
The month with the highest atmospheric pressure is January (30.28"Hg).
The month with the lowest atmospheric pressure is June (29.92"Hg).
Average wind speed in September
Saint Anthony, ID
- Average wind speed in September: 6.2mph
The windiest month (with the highest average wind speed) is June (6.9mph).
The calmest month (with the lowest average wind speed) is January (4.2mph).
Average humidity in September
Saint Anthony, ID
- Average humidity in September: 44%
The month with the highest relative humidity is January (91%).
The month with the lowest relative humidity is August (39%).
Average rainfall in September
Saint Anthony, ID
- Average rainfall in September: 0.87"
The wettest month (with the highest rainfall) is January (1.5").
The driest month (with the least rainfall) is July (0.28").
Average rainfall days in September
Saint Anthony, ID
- Average rainfall days in September: 7.1 days
The month with the highest number of rainy days is April (13 days).
The month with the least rainy days is July (5 days).
Average snowfall in September
Saint Anthony, ID
- Average snowfall in September: 0.04"
The month with the highest snowfall is January (11.97").
The months with the least snowfall are June, July and August (0").
Average snowfall days in September
Saint Anthony, ID
- Average snowfall days in September: 0.2 days
The month with the highest number of snowfall days is January (18.1 days).
The months with the least snowfall days are July and August (0 days).
Average daylight in September /
Average sunshine in September
Saint Anthony, ID
- Average daylight in September: 12h and 30min
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: 10h and 0min
The month with the most sunshine is July (Average sunshine: 12h and 6min).
The month with the least sunshine is January (Average sunshine: 4h and 18min).
Average sunshine days in September
Saint Anthony, ID
- Average sunshine days in September: 20.7 days
The month with the most sunshine days is July (24.8 days).
The month with the least sunshine days is February (10.6 days).
Average UV index in September
Saint Anthony, 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, November and December (UV index 1).
Average cloud cover in September
Saint Anthony, ID
- Average cloud cover in September: 16
The month with the most cloud cover is February (Cloud cover 56).
The months with the least cloud cover are July and August (Cloud cover 11).
Average visibility in September
Saint Anthony, ID
- Average visibility in September: 6mi
The months with the highest visibility are April, May, June, July, August, September, October and November (6mi).
The month with the lowest visibility is January (3mi).
