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 78.4°F (25.8°C) in August to an agreeable 68.9°F (20.5°C). Red River Hot Springs, after hot September days, encounters a marked drop to an average nighttime temperature of 40.8°F (4.9°C).Humidity
In Red River Hot Springs, the average relative humidity in September is 59%.Rainfall
In Red River Hot Springs, during September, the rain falls for 9.4 days and regularly aggregates up to 1.14" (29mm) of precipitation. Throughout the year, in Red River Hot Springs, there are 138.5 rainfall days, and 26.54" (674mm) of precipitation is accumulated.Snowfall
Months with snowfall 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 1.06" (27mm) of snow. Throughout the year, there are 112.5 snowfall days, and 101.3" (2573mm) of snow is accumulated.Daylight
The average length of the day in September is 12h and 31min.On the first day of September, sunrise is at 6:02 am and sunset at 7:18 pm. On the last day of the month, sunrise is at 6:38 am and sunset at 6:22 pm PDT.
Sunshine
In Red River Hot Springs, the average sunshine in September is 9.7h.UV index
In Red River Hot Springs, the average daily maximum UV index in September is 3. A UV Index reading of 3 to 5 represents a moderate threat to health from exposure to the Sun's UV radiation for the ordinary person.Note: The UV index of 3 during September translates into the following guidance:
Exercise prevention - Protecting skin and eyes from harm is required. The intensity of the Sun's UV radiation during midday suggests reducing time spent outdoors. Combat UV radiation's detrimental effects with sun-safe clothing and UV-blocking eyewear. Warning! The reflection from snow can nearly magnify the Sun's UV radiation twofold.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What is the temperature in September?
What is the average humidity in September?
How many days does it rain in September?
When does it start snowing?
What is the average length of the day in September?
When are sunrise and sunset in September?
How many hours of sunshine does Red River Hot Springs have in September?
What is the UV index reading in September in Red River Hot Springs?
Average temperature in September
Red River Hot Springs, ID
- Average high temperature in September: 68.9°F
The warmest month (with the highest average high temperature) is August (78.4°F).
The month with the lowest average high temperature is December (29.5°F).
- Average low temperature in September: 40.8°F
The month with the highest average low temperature is August (46.4°F).
The coldest month (with the lowest average low temperature) is December (16.3°F).
Average pressure in September
Red River Hot Springs, ID
- Average pressure in September: 29.98"Hg
The month with the highest atmospheric pressure is January (30.22"Hg).
The month with the lowest atmospheric pressure is June (29.94"Hg).
Average wind speed in September
Red River Hot Springs, ID
- Average wind speed in September: 3.9mph
The windiest month (with the highest average wind speed) is January (4.8mph).
The calmest months (with the lowest average wind speed) are August and September (3.9mph).
Average humidity in September
Red River Hot Springs, ID
- Average humidity in September: 59%
The months with the highest relative humidity are January and February (91%).
The month with the lowest relative humidity is August (53%).
Average rainfall in September
Red River Hot Springs, ID
- Average rainfall in September: 1.14"
The wettest month (with the highest rainfall) is April (3.39").
The driest month (with the least rainfall) is August (0.79").
Average rainfall days in September
Red River Hot Springs, ID
- Average rainfall days in September: 9.4 days
The month with the highest number of rainy days is May (19.4 days).
The month with the least rainy days is February (7.1 days).
Average snowfall in September
Red River Hot Springs, ID
- Average snowfall in September: 1.06"
The month with the highest snowfall is February (20.35").
The months with the least snowfall are July and August (0").
Average snowfall days in September
Red River Hot Springs, ID
- Average snowfall days in September: 0.5 days
The month with the highest number of snowfall days is February (19.3 days).
The months with the least snowfall days are July and August (0 days).
Average daylight in September /
Average sunshine in September
Red River Hot Springs, ID
- Average daylight in September: 12h and 3min
The month with the longest days is June (Average daylight: 15h and 42min).
The month with the shortest days is December (Average daylight: 8h and 42min).
- Average sunshine in September: 9h and 4min
The month with the most sunshine is August (Average sunshine: 11h and 54min).
The month with the least sunshine is February (Average sunshine: 4h and 24min).
Average sunshine days in September
Red River Hot Springs, ID
- Average sunshine days in September: 17.6 days
The month with the most sunshine days is August (19.6 days).
The month with the least sunshine days is April (6 days).
Average UV index in September
Red River Hot Springs, 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 February, November and December (UV index 1).
Average cloud cover in September
Red River Hot Springs, ID
- Average cloud cover in September: 22
The month with the most cloud cover is February (Cloud cover 60).
The month with the least cloud cover is August (Cloud cover 13).
Average visibility in September
Red River Hot Springs, ID
- Average visibility in September: 6mi
The months with the highest visibility are June, July, August, September and October (6mi).
The months with the lowest visibility are January, February, March, April and December (4mi).
Red River Hot Springs, Idaho, USA
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