September weather forecastCocolalla, ID
September
Weather in September
September, the first month of the autumn in Cocolalla, is still a pleasant month, with an average temperature ranging between min 42.6°F (5.9°C) and max 69.8°F (21°C).Temperature
Transition from August to September is accompanied by a temperature drop, with average high-temperatures decreasing from a warm 80.6°F (27°C) to an agreeable 69.8°F (21°C). The nighttime temperature in Cocolalla, Idaho, during September displays a significant divergence from daily peaks, averaging at a wintry 42.6°F (5.9°C).Humidity
In September, the average relative humidity in Cocolalla is 61%.Rainfall
In September, the rain falls for 9.5 days. Throughout September, 1.02" (26mm) of precipitation is accumulated. In Cocolalla, during the entire year, the rain falls for 145.7 days and collects up to 23.78" (604mm) of precipitation.Snowfall
January through May, September through December are months with snowfall. 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 Cocolalla, during the entire year, snow falls for 78 days and aggregates up to 56.73" (1441mm) of snow.Daylight
In Cocolalla, the average length of the day in September is 12h and 34min.On the first day of September, sunrise is at 6:05 am and sunset at 7:26 pm. On the last day of the month, sunrise is at 6:45 am and sunset at 6:26 pm PDT.
Sunshine
The average sunshine in September is 9.6h.UV index
In September, the average daily maximum UV index is 3. A UV Index of 3 to 5 symbolizes a moderate health risk from unprotected exposure to Sun's UV rays for the ordinary person.Note: A daily maximum UV index of 3 in September translates into the following instructions:
Exercise caution. Those with pale skin may experience burns in less than half an hour. For health reasons, it's advisable to reduce direct sun exposure during peak hours around midday. Protect your eyes, ears, face, and neck from the Sun by wearing a wide-brimmed hat. Watch out! The Sun's UV radiation can be nearly magnified twofold due to snow reflection.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in September
Cocolalla, 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
Cocolalla, 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
Cocolalla, 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
Cocolalla, 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
Cocolalla, 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
Cocolalla, 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
Cocolalla, 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
Cocolalla, 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
Cocolalla, ID
- Average daylight in September: 12h and 36min
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 24min).
- Average sunshine in September: 9h and 36min
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
Cocolalla, 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
Cocolalla, 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
Cocolalla, 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
Cocolalla, 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).
