September weather forecastPocatello, ID
September
Weather in September
September in Pocatello, Idaho presents a gentle transition from summer to autumn. Comparison to last month's high of 85.3°F (29.6°C) in August, September brings a noticeable drop to an average high temperature of 74.3°F (23.5°C). The golden hues start to blanket the trees, offering visitors stunning landscapes and attractive photo opportunities. Despite shortened daylight hours, the amount of sunshine still favors outdoor trips and weekend outings. With the advent of fall, the slight nip in the air reminds that winter is not far behind.Temperature
The arrival of September indicates a decrease in the average high-temperature, moving from a moderately hot 85.3°F (29.6°C) in August to a still warm 74.3°F (23.5°C). In September, Pocatello experiences a significant drop from daily zeniths to an average nighttime temperature of 51.1°F (10.6°C).Humidity
The average relative humidity in September is 38%.Rainfall
In Pocatello, during September, the rain falls for 7.5 days and regularly aggregates up to 0.63" (16mm) of precipitation. In Pocatello, Idaho, during the entire year, the rain falls for 116.1 days and collects up to 11.26" (286mm) of precipitation.Snowfall
Months with snowfall 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. Throughout the year, there are 70.2 snowfall days, and 31.61" (803mm) of snow is accumulated.Daylight
The average length of the day in September 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, sunrise is at 7:26 am and sunset at 7:12 pm MDT.
Sunshine
In Pocatello, the average sunshine in September is 9.9h.UV index
The average daily maximum UV index in September is 4. A UV Index estimate of 3 to 5 represents a moderate threat to health from unsafe exposure to UV radiation for ordinary individuals.Note: The maximum UV index, 4 during September, leads to the following recommendations:
Take care. Persons with lighter skin might suffer burns in less than 30 minutes. Solar radiation peaks around mid-day, so it's wise to limit exposure to the Sun at this time. For holistic sun protection encompassing the eyes, ears, face, and neck, a wide-brim hat is key. Caution! The reflection of snow can nearly double the intensity of the Sun's UV radiation.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in September
Pocatello, 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
Pocatello, 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
Pocatello, 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
Pocatello, 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
Pocatello, 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
Pocatello, 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
Pocatello, 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
Pocatello, 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
Pocatello, ID
- Average daylight in September: 12h and 30min
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 54min
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
Pocatello, 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
Pocatello, 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
Pocatello, 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
Pocatello, 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).
