September weather forecastMcCall, ID
September
Weather in September
September brings the onset of autumn to McCall. It's a beautiful month as the town starts to display a spectrum of fall colors. Temperatures begin to fall from their August highs, bringing much-needed relief from the city's sweltering summer heat. Inhabitants relish the cooler evenings and the gradual decline in daylight hours. As the city transitions from summer, autumnal activities replace the summer adventures that once filled the schedule.Temperature
McCall in September undergoes a mild reduction in the average high-temperature, shifting from August's warm 76.6°F (24.8°C) to a refreshing 67.1°F (19.5°C). Despite the high peak temperatures, McCall witnesses an average nighttime cooling to a cold 41.9°F (5.5°C) in September.Humidity
In September, the average relative humidity is 53%.Rainfall
In McCall, in September, during 8.9 rainfall days, 1.02" (26mm) of precipitation is typically accumulated. Throughout the year, there are 116.3 rainfall days, and 27.24" (692mm) of precipitation is accumulated.Snowfall
January through June, September through December are months with snowfall. September is the first month it typically snows. Throughout September, in the average 0.8 snowfall days, it receives 0.51" (13mm) of snow. In McCall, during the entire year, snow falls for 119.5 days and aggregates up to 130.79" (3322mm) of snow.Daylight
The average length of the day in September is 12h and 30min.On the first day of the month, sunrise is at 7:07 am and sunset at 8:20 pm. On the last day of September, sunrise is at 7:42 am and sunset at 7:26 pm MDT.
Sunshine
In September, the average sunshine is 9.2h.UV index
The average daily maximum UV index in September is 3. A UV Index reading of 3 to 5 represents a medium vulnerability from unprotected exposure to Sun's UV rays for ordinary individuals.Note: The maximum UV index, 3 during September, leads to the following recommendations:
Be vigilant - Preventing sunburn is recommended. For health reasons, it's advisable to reduce direct sun exposure during peak hours around midday. Wearing sunglasses with both UVA and UVB protection effectively reduces sun-induced eye damage. Be careful! The Sun's UV radiation can nearly be doubled by the reflective quality of snow.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in September
McCall, ID
- Average high temperature in September: 67.1°F
The warmest months (with the highest average high temperature) are July and August (76.6°F).
The month with the lowest average high temperature is December (26.4°F).
- Average low temperature in September: 41.9°F
The month with the highest average low temperature is August (48.2°F).
The coldest month (with the lowest average low temperature) is January (13.6°F).
Average pressure in September
McCall, ID
- Average pressure in September: 29.97"Hg
The month with the highest atmospheric pressure is January (30.24"Hg).
The month with the lowest atmospheric pressure is June (29.93"Hg).
Average wind speed in September
McCall, ID
- Average wind speed in September: 5mph
The windiest month (with the highest average wind speed) is March (5.6mph).
The calmest month (with the lowest average wind speed) is January (4.8mph).
Average humidity in September
McCall, ID
- Average humidity in September: 53%
The months with the highest relative humidity are January and February (92%).
The month with the lowest relative humidity is August (45%).
Average rainfall in September
McCall, ID
- Average rainfall in September: 1.02"
The wettest month (with the highest rainfall) is March (3.62").
The driest month (with the least rainfall) is July (0.51").
Average rainfall days in September
McCall, ID
- Average rainfall days in September: 8.9 days
The month with the highest number of rainy days is May (18.6 days).
The month with the least rainy days is January (3.6 days).
Average snowfall in September
McCall, ID
- Average snowfall in September: 0.51"
The month with the highest snowfall is January (26.89").
The months with the least snowfall are July and August (0").
Average snowfall days in September
McCall, ID
- Average snowfall days in September: 0.8 days
The month with the highest number of snowfall days is March (20.6 days).
The months with the least snowfall days are July and August (0 days).
Average daylight in September /
Average sunshine in September
McCall, ID
- Average daylight in September: 12h and 30min
The month with the longest days is June (Average daylight: 15h and 30min).
The month with the shortest days is December (Average daylight: 8h and 48min).
- Average sunshine in September: 9h and 12min
The month with the most sunshine is July (Average sunshine: 11h and 48min).
The months with the least sunshine are January and December (Average sunshine: 4h and 0min).
Average sunshine days in September
McCall, ID
- Average sunshine days in September: 18.1 days
The month with the most sunshine days is July (21.2 days).
The month with the least sunshine days is March (6.8 days).
Average UV index in September
McCall, ID
- Average UV index in September: 3
The month with the highest UV index is July (UV index 5).
The months with the lowest UV index are January, February, March, November and December (UV index 1).
Average cloud cover in September
McCall, ID
- Average cloud cover in September: 19
The month with the most cloud cover is February (Cloud cover 64).
The month with the least cloud cover is August (Cloud cover 11).
Average visibility in September
McCall, ID
- Average visibility in September: 6mi
The months with the highest visibility are May, June, July, August, September and October (6mi).
The month with the lowest visibility is January (3mi).
