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 commencement of September involves a temperature shift, with the average high-temperature dropping from a warm 79.2°F (26.2°C) in August to an agreeable 69.3°F (20.7°C). Despite soaring daytime temperatures, Alexander registers a consistent average low-temperature of 43.7°F (6.5°C) in September.Humidity
The average relative humidity in September in Alexander is 48%.Rainfall
In September, the rain falls for 8.9 days. Throughout September, 1.1" (28mm) of precipitation is accumulated. 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, in Alexander, Idaho, there are 106.2 snowfall days, and 69.33" (1761mm) of snow is accumulated.Daylight
In Alexander, the average length of the day in September is 12h and 28min.On the first day of September in Alexander, sunrise is at 6:52 am and sunset at 8:00 pm. On the last day of the month, sunrise is at 7:23 am and sunset at 7:09 pm MDT.
Sunshine
In September, the average sunshine in Alexander is 10h.UV index
In September, the average daily maximum UV index is 3. A UV Index reading of 3 to 5 represents a moderate threat to health from exposure to the Sun's UV rays for the average person.Note: The average daily UV index of 3 in September transforms into the following instructions:
Take precautions. Light skin individuals may get burned in less than 30 minutes. Direct exposure to the Sun during its peak hours around mid-day should be minimized for safety. Protect your eyes, ears, face, and neck from the Sun by wearing a wide-brimmed hat. Warning! The reflection from snow can nearly magnify the Sun's UV radiation twofold.
Frequently asked questions
What is the temperature in September in Alexander?
What is the average humidity in September in Alexander?
How many days does it rain in September in Alexander?
When does it start snowing in Alexander?
What is the average length of the day in September in Alexander?
When are sunrise and sunset in September in Alexander?
How long on average sun shines in September in Alexander?
What is the UV index reading in September in Alexander?
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 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: 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).
Alexander, Idaho, USA
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