September weather forecastChapin, ID
September
Weather in September
The first month of the autumn, September, is still a refreshing month in Chapin, Idaho, with an average temperature fluctuating between 40.1°F (4.5°C) and 64.9°F (18.3°C).Temperature
Chapin in September demonstrates a small temperature transition, adjusting from an average high of a warm 74.1°F (23.4°C) in August to a refreshing 64.9°F (18.3°C). A notable decrease from the day's highest temperature marks September, culminating in an average low of 40.1°F (4.5°C).Humidity
In Chapin, the average relative humidity in September is 54%.Rainfall
In September, the rain falls for 9.5 days. Throughout September, 1.65" (42mm) of precipitation is accumulated. Throughout the year, there are 96.6 rainfall days, and 32.95" (837mm) of precipitation is accumulated.Snowfall
Months with snowfall in Chapin are January through June, August through December. In Chapin, in September, snow falls for 2.5 days, with typically accumulated 4.49" (114mm) of snow. In Chapin, during the entire year, snow falls for 160.8 days and aggregates up to 200.16" (5084mm) of snow.Daylight
In Chapin, Idaho, the average length of the day in September is 12h and 29min.On the first day of the month, sunrise is at 6:49 am and sunset at 7:59 pm. On the last day of September, sunrise is at 7:21 am and sunset at 7:06 pm MDT.
Sunshine
The average sunshine in September is 9.9h.UV index
In September, the average daily maximum UV index in Chapin, Idaho, 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 ordinary person.Note: In September, the maximum UV index of 3 suggests this advice:
Guard yourself - An obligation to protect skin and eyes from harm exists. When the Sun's UV radiation is most intense during midday, it's best to find shade and limit exposure. Enhance your sun protection with tightly woven, yet airy clothing. 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
Chapin, ID
- Average high temperature in September: 64.9°F
The warmest month (with the highest average high temperature) is July (75.4°F).
The month with the lowest average high temperature is December (23.2°F).
- Average low temperature in September: 40.1°F
The month with the highest average low temperature is July (46.9°F).
The coldest month (with the lowest average low temperature) is December (7.7°F).
Average pressure in September
Chapin, 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
Chapin, ID
- Average wind speed in September: 5.6mph
The windiest month (with the highest average wind speed) is June (6.2mph).
The calmest months (with the lowest average wind speed) are January and December (4.8mph).
Average humidity in September
Chapin, ID
- Average humidity in September: 54%
The month with the highest relative humidity is February (94%).
The month with the lowest relative humidity is August (47%).
Average rainfall in September
Chapin, ID
- Average rainfall in September: 1.65"
The wettest month (with the highest rainfall) is February (4.13").
The driest month (with the least rainfall) is July (0.91").
Average rainfall days in September
Chapin, ID
- Average rainfall days in September: 9.5 days
The month with the highest number of rainy days is May (15.5 days).
The month with the least rainy days is January (3 days).
Average snowfall in September
Chapin, ID
- Average snowfall in September: 4.49"
The month with the highest snowfall is February (34.33").
The month with the least snowfall is July (0").
Average snowfall days in September
Chapin, ID
- Average snowfall days in September: 2.5 days
The month with the highest number of snowfall days is March (23.6 days).
The month with the least snowfall days is July (0.1 days).
Average daylight in September /
Average sunshine in September
Chapin, ID
- Average daylight in September: 12h and 30min
The month with the longest days is June (Average daylight: 15h and 24min).
The month with the shortest days is December (Average daylight: 9h and 0min).
- Average sunshine in September: 9h and 54min
The month with the most sunshine is July (Average sunshine: 11h and 42min).
The month with the least sunshine is February (Average sunshine: 3h and 18min).
Average sunshine days in September
Chapin, ID
- Average sunshine days in September: 16.7 days
The month with the most sunshine days is July (20.3 days).
The month with the least sunshine days is April (6.2 days).
Average UV index in September
Chapin, 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, October, November and December (UV index 1).
Average cloud cover in September
Chapin, ID
- Average cloud cover in September: 20
The month with the most cloud cover is February (Cloud cover 73).
The month with the least cloud cover is August (Cloud cover 14).
Average visibility in September
Chapin, 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, February, March and December (3mi).
