September weather forecastAlexander, ID
September
Weather in September
The first month of the autumn, September, is still a pleasant month in Alexander, Idaho, with an average temperature ranging between min 43.7°F (6.5°C) and max 69.3°F (20.7°C).Temperature
In Alexander, the average high-temperature in September drops from a warm 79.2°F (26.2°C) in August to a pleasant 69.3°F (20.7°C). Alexander notes a substantial temperature decline from the daytime peaks throughout September, with an average nighttime temperature of 43.7°F (6.5°C).Humidity
In September, the average relative humidity is 48%.Rainfall
In Alexander, in September, it is raining for 8.9 days, with typically 1.1" (28mm) of accumulated precipitation. In Alexander, during the entire year, the rain falls for 100.3 days and collects up to 15.39" (391mm) of precipitation.Snowfall
Months with snowfall in Alexander are January through June, September through December. September is the first month it typically snows. Throughout September, in the average 0.5 snowfall days, it receives 0.39" (10mm) of snow. Throughout the year, there are 106.2 snowfall days, and 69.33" (1761mm) of snow is accumulated.Daylight
The average length of the day in September in Alexander, Idaho, is 12h and 28min.On the first day of the month, sunrise is at 6:52 am and sunset at 8:00 pm. On the last day of September, in Alexander, sunrise is at 7:23 am and sunset at 7:09 pm MDT.
Sunshine
In September, the average sunshine is 10h.UV index
In September, the average daily maximum UV index is 3. A UV Index reading of 3 to 5 represents a medium health hazard from unsafe exposure to UV radiation for ordinary individuals.Note: An average maximum UV index of 3 in September leads to these recommendations:
Make use of precautions - Shielding skin and eyes from injury is a requirement. Midday is the peak time for the Sun's radiation; stay in the shade and protect yourself. In bright sunlight, prioritize sunglasses that grant protection from UVA and UVB radiation. Heed this! Snow reflection can almost augment the UV radiation of the sun by double.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in September
Alexander, ID
- Average high temperature in September: 69.3°F
The warmest month (with the highest average high temperature) is July (80.2°F).
The month with the lowest average high temperature is December (25.7°F).
- Average low temperature in September: 43.7°F
The month with the highest average low temperature is August (49.6°F).
The coldest month (with the lowest average low temperature) is January (10.2°F).
Average pressure in September
Alexander, ID
- Average pressure in September: 29.97"Hg
The month with the highest atmospheric pressure is January (30.3"Hg).
The month with the lowest atmospheric pressure is June (29.9"Hg).
Average wind speed in September
Alexander, ID
- Average wind speed in September: 5.7mph
The windiest month (with the highest average wind speed) is June (5.9mph).
The calmest month (with the lowest average wind speed) is January (4.8mph).
Average humidity in September
Alexander, ID
- Average humidity in September: 48%
The months with the highest relative humidity are January and February (92%).
The month with the lowest relative humidity is August (42%).
Average rainfall in September
Alexander, ID
- Average rainfall in September: 1.1"
The wettest month (with the highest rainfall) is May (1.97").
The driest month (with the least rainfall) is July (0.55").
Average rainfall days in September
Alexander, ID
- Average rainfall days in September: 8.9 days
The month with the highest number of rainy days is May (14.9 days).
The month with the least rainy days is January (4.3 days).
Average snowfall in September
Alexander, ID
- Average snowfall in September: 0.39"
The month with the highest snowfall is January (14.41").
The months with the least snowfall are July and August (0").
Average snowfall days in September
Alexander, ID
- Average snowfall days in September: 0.5 days
The months with the highest number of snowfall days are February and December (19.9 days).
The months with the least snowfall days are July and August (0 days).
Average daylight in September /
Average sunshine in September
Alexander, 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: 10h and 0min
The month with the most sunshine is July (Average sunshine: 11h and 54min).
The month with the least sunshine is January (Average sunshine: 4h and 18min).
Average sunshine days in September
Alexander, ID
- Average sunshine days in September: 18.6 days
The month with the most sunshine days is July (19.1 days).
The month with the least sunshine days is February (8.6 days).
Average UV index in September
Alexander, ID
- Average UV index in September: 3
The month with the highest UV index is July (UV index 6).
The months with the lowest UV index are January, February and December (UV index 1).
Average cloud cover in September
Alexander, ID
- Average cloud cover in September: 16
The month with the most cloud cover is February (Cloud cover 62).
The months with the least cloud cover are July and August (Cloud cover 12).
Average visibility in September
Alexander, ID
- Average visibility in September: 6mi
The months with the highest visibility are May, June, July, August, September and October (6mi).
The months with the lowest visibility are January and February (3mi).
