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
September's onset corresponds with a shift in the average high-temperature, moving from a moderately hot 79.5°F (26.4°C) in August to a pleasant 69.4°F (20.8°C). Nighttime temperatures exhibit a substantial dip from daytime highs during September, averaging at a frosty 44.1°F (6.7°C).Humidity
In September, the average relative humidity in Ashton is 48%.Rainfall
In Ashton, in September, it is raining for 9.1 days, with typically 1.26" (32mm) of accumulated precipitation. In Ashton, during the entire year, the rain falls for 121 days and collects up to 20.12" (511mm) of precipitation.Snowfall
January through June, September through December are months with snowfall. September is the first month it typically snows in Ashton. Throughout September, in the average 0.5 snowfall days, it receives 0.67" (17mm) of snow. Throughout the year, in Ashton, there are 119.7 snowfall days, and 88.23" (2241mm) of snow is accumulated.Daylight
In September, the average length of the day is 12h and 29min.On the first day of the month, sunrise is at 6:49 am and sunset at 8:01 pm. On the last day of September, sunrise is at 7:23 am and sunset at 7:07 pm MDT.
Sunshine
In Ashton, the average sunshine in September is 10h.UV index
In September, the average daily maximum UV index in Ashton, Idaho, is 3. A UV Index estimate of 3 to 5 represents a moderate health risk from unsafe exposure to UV radiation for the average person.Note: A maximum UV index of 3 in September translates into the following recommendations:
Take necessary precautions - Protection from skin and eye injury is mandatory. The intensity of the Sun's UV radiation during midday suggests reducing time spent outdoors. Wearing sunglasses with both UVA and UVB protection effectively reduces sun-induced eye damage. Remember this! The UV radiation of the Sun can be nearly doubled by the reflective properties of snow.
Frequently asked questions
What is the usual temperature for Ashton in September?
What is the average humidity in September in Ashton?
How many days does it rain in September in Ashton?
When does it start snowing in Ashton?
How many hours of daylight does Ashton have in September?
What time are sunrise and sunset in September in Ashton?
How many hours of sunshine does Ashton have in September?
What is the UV index intensity in September in Ashton?
Average temperature in September
Ashton, ID
- Average high temperature in September: 69.4°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°F).
- Average low temperature in September: 44.1°F
The month with the highest average low temperature is July (50°F).
The coldest month (with the lowest average low temperature) is January (10.8°F).
Average pressure in September
Ashton, ID
- Average pressure in September: 29.99"Hg
The month with the highest atmospheric pressure is January (30.27"Hg).
The month with the lowest atmospheric pressure is June (29.92"Hg).
Average wind speed in September
Ashton, ID
- Average wind speed in September: 6mph
The windiest month (with the highest average wind speed) is June (6.6mph).
The calmest month (with the lowest average wind speed) is January (4.4mph).
Average humidity in September
Ashton, 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
Ashton, ID
- Average rainfall in September: 1.26"
The wettest month (with the highest rainfall) is January (2.44").
The driest month (with the least rainfall) is July (0.59").
Average rainfall days in September
Ashton, ID
- Average rainfall days in September: 9.1 days
The month with the highest number of rainy days is May (17.3 days).
The month with the least rainy days is January (4.5 days).
Average snowfall in September
Ashton, ID
- Average snowfall in September: 0.67"
The month with the highest snowfall is January (20").
The months with the least snowfall are July and August (0").
Average snowfall days in September
Ashton, ID
- Average snowfall days in September: 0.5 days
The month with the highest number of snowfall days is December (21.6 days).
The months with the least snowfall days are July and August (0 days).
Average daylight in September /
Average sunshine in September
Ashton, ID
- Average daylight in September: 12h and 3min
The month with the longest days is June (Average daylight: 15h and 24min).
The month with the shortest days is December (Average daylight: 8h and 54min).
- 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 12min).
Average sunshine days in September
Ashton, ID
- Average sunshine days in September: 18 days
The month with the most sunshine days is July (19.9 days).
The month with the least sunshine days is April (6.7 days).
Average UV index in September
Ashton, 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, November and December (UV index 1).
Average cloud cover in September
Ashton, ID
- Average cloud cover in September: 17
The month with the most cloud cover is February (Cloud cover 61).
The months with the least cloud cover are July and August (Cloud cover 12).
Average visibility in September
Ashton, ID
- Average visibility in September: 6mi
The months with the highest visibility are April, May, June, July, August, September and October (6mi).
The month with the lowest visibility is January (3mi).
Ashton, Idaho, USA
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