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
In Athol, entering September brings a temperature decrement, reducing from August's moderately hot 80.6°F (27°C) to an agreeable 69.8°F (21°C). Athol anticipates a considerable daily temperature fluctuation in September, with low temperatures averaging an icy 42.6°F (5.9°C).Humidity
In September, the average relative humidity is 61%.Rainfall
In Athol, during September, the rain falls for 9.5 days and regularly aggregates up to 1.02" (26mm) of precipitation. In Athol, during the entire year, the rain falls for 145.7 days and collects up to 23.78" (604mm) 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 0.2 snowfall days, it receives 0.2" (5mm) of snow. In Athol, Idaho, during the entire year, snow falls for 78 days and aggregates up to 56.73" (1441mm) of snow.Daylight
The average length of the day in September in Athol is 12h and 33min.On the first day of the month, sunrise is at 6:06 am and sunset at 7:27 pm. On the last day of September, in Athol, sunrise is at 6:45 am and sunset at 6:27 pm PDT.
Sunshine
In Athol, the average sunshine in September is 9.6h.UV index
In September, the average daily maximum UV index is 3. A UV Index value of 3 to 5 symbolizes a moderate health risk from exposure to the Sun's UV rays for the average person.Note: The maximum UV index of 3 during September translates into these guidelines:
Undertake precautions - Guarding against sun damage is counselled. When the Sun is at its strongest around midday, find shade and limit exposure. For optimum UV protection, wear sun-resistant attire complemented with a hat and quality shades. Mind you! Snow reflection can increase the intensity of the Sun's UV radiation nearly twofold.
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Data Sources | Weather Forecasting & Climate
Frequently asked questions
What is the average September temperature?
What is the average humidity in September?
How much does it rain in September?
When does it start to snow?
What is the average length of the day in September?
What time are sunrise and sunset in September?
How long on average sun shines in September?
What is the UV index reading in September?
Average temperature in September
Athol, ID
- Average high temperature in September: 69.8°F
The warmest month (with the highest average high temperature) is July (80.8°F).
The month with the lowest average high temperature is December (29.7°F).
- Average low temperature in September: 42.6°F
The month with the highest average low temperature is August (49.6°F).
The coldest month (with the lowest average low temperature) is December (19.4°F).
Average pressure in September
Athol, ID
- Average pressure in September: 29.97"Hg
The month with the highest atmospheric pressure is January (30.19"Hg).
The months with the lowest atmospheric pressure are June and August (29.92"Hg).
Average wind speed in September
Athol, ID
- Average wind speed in September: 3.9mph
The windiest month (with the highest average wind speed) is April (4.5mph).
The calmest month (with the lowest average wind speed) is December (3.4mph).
Average humidity in September
Athol, ID
- Average humidity in September: 61%
The month with the highest relative humidity is January (94%).
The month with the lowest relative humidity is August (51%).
Average rainfall in September
Athol, ID
- Average rainfall in September: 1.02"
The wettest months (with the highest rainfall) are January and December (3.07").
The driest month (with the least rainfall) is August (0.51").
Average rainfall days in September
Athol, ID
- Average rainfall days in September: 9.5 days
The month with the highest number of rainy days is April (18.1 days).
The month with the least rainy days is August (6.3 days).
Average snowfall in September
Athol, ID
- Average snowfall in September: 0.2"
The month with the highest snowfall is January (15.94").
The months with the least snowfall are June, July and August (0").
Average snowfall days in September
Athol, ID
- Average snowfall days in September: 0.2 days
The month with the highest number of snowfall days is December (17.7 days).
The months with the least snowfall days are June, July and August (0 days).
Average daylight in September /
Average sunshine in September
Athol, ID
- Average daylight in September: 12h and 4min
The month with the longest days is June (Average daylight: 16h and 0min).
The month with the shortest days is December (Average daylight: 8h and 30min).
- Average sunshine in September: 9h and 4min
The month with the most sunshine is August (Average sunshine: 11h and 54min).
The months with the least sunshine are January and December (Average sunshine: 3h and 18min).
Average sunshine days in September
Athol, ID
- Average sunshine days in September: 19.3 days
The month with the most sunshine days is August (22.2 days).
The month with the least sunshine days is March (8.4 days).
Average UV index in September
Athol, 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 February, November and December (UV index 1).
Average cloud cover in September
Athol, ID
- Average cloud cover in September: 25
The months with the most cloud cover are January and December (Cloud cover 66).
The month with the least cloud cover is August (Cloud cover 14).
Average visibility in September
Athol, ID
- Average visibility in September: 6mi
The months with the highest visibility are May, June, July, August and September (6mi).
The months with the lowest visibility are January, February and December (3mi).
Athol, Idaho, USA
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