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
Start of September brings a shift in the average high-temperature, falling from August's warm 76.3°F (24.6°C) to a refreshing 65.8°F (18.8°C). Naples registers a significant drop in temperature in September, with average nighttime lows of 39.9°F (4.4°C).Humidity
In September, the average relative humidity in Naples, Idaho, is 64%.Rainfall
In September, in Naples, the rain falls for 9.5 days. Throughout September, 0.87" (22mm) of precipitation is accumulated. Throughout the year, there are 157.1 rainfall days, and 21.61" (549mm) of precipitation is accumulated.Snowfall
January through April, September through December are months with snowfall in Naples. September is the first month it typically snows. Throughout September, in the average 0.3 snowfall days, it receives 0.51" (13mm) of snow. In Naples, during the entire year, snow falls for 70.6 days and aggregates up to 41.77" (1061mm) of snow.Daylight
In September, the average length of the day is 12h and 34min.On the first day of September in Naples, sunrise is at 6:04 am and sunset at 7:26 pm. On the last day of the month, sunrise is at 6:44 am and sunset at 6:25 pm PDT.
Sunshine
In September, the average sunshine is 9.7h.UV index
In Naples, the average daily maximum UV index in September is 3. A UV Index reading of 3 to 5 represents a medium health hazard from exposure to the Sun's UV radiation for average individuals.Note: The UV index of 3 during September leads to these advisories:
Undertake precautions - Guarding against sun damage is counselled. It's crucial to reduce time in the direct Sun around mid-day due to the intense solar radiation. Tightly woven clothing, when worn loosely, shields effectively against the Sun. Remember! The Sun's UV radiation can be magnified almost twofold by the reflection of snow.
Frequently asked questions
What is the average September temperature in Naples?
What is the average humidity in September in Naples?
How much does it rain in Naples in September?
When does it start to snow in Naples?
How many hours of daylight does Naples have in September?
What time are sunrise and sunset in September in Naples?
How long on average sun shines in September in Naples?
How high is the UV index in September in Naples?
Average temperature in September
Naples, ID
- Average high temperature in September: 65.8°F
The warmest month (with the highest average high temperature) is August (76.3°F).
The month with the lowest average high temperature is December (27.3°F).
- Average low temperature in September: 39.9°F
The month with the highest average low temperature is August (47.7°F).
The coldest months (with the lowest average low temperature) are January and December (16.3°F).
Average pressure in September
Naples, ID
- Average pressure in September: 29.98"Hg
The month with the highest atmospheric pressure is January (30.19"Hg).
The month with the lowest atmospheric pressure is June (29.91"Hg).
Average wind speed in September
Naples, ID
- Average wind speed in September: 3.7mph
The windiest month (with the highest average wind speed) is June (4.3mph).
The calmest month (with the lowest average wind speed) is December (3.5mph).
Average humidity in September
Naples, ID
- Average humidity in September: 64%
The month with the highest relative humidity is January (94%).
The month with the lowest relative humidity is August (55%).
Average rainfall in September
Naples, ID
- Average rainfall in September: 0.87"
The wettest month (with the highest rainfall) is December (2.76").
The driest month (with the least rainfall) is August (0.43").
Average rainfall days in September
Naples, ID
- Average rainfall days in September: 9.5 days
The month with the highest number of rainy days is April (19.7 days).
The month with the least rainy days is August (6.5 days).
Average snowfall in September
Naples, ID
- Average snowfall in September: 0.51"
The month with the highest snowfall is January (11.02").
The months with the least snowfall are May, June, July and August (0").
Average snowfall days in September
Naples, ID
- Average snowfall days in September: 0.3 days
The month with the highest number of snowfall days is December (17.4 days).
The months with the least snowfall days are May, June, July and August (0 days).
Average daylight in September /
Average sunshine in September
Naples, ID
- Average daylight in September: 12h and 4min
The month with the longest days is June (Average daylight: 16h and 6min).
The month with the shortest days is December (Average daylight: 8h and 24min).
- 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 January (Average sunshine: 3h and 48min).
Average sunshine days in September
Naples, ID
- Average sunshine days in September: 18 days
The month with the most sunshine days is August (21.8 days).
The month with the least sunshine days is March (7.7 days).
Average UV index in September
Naples, 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, November and December (UV index 1).
Average cloud cover in September
Naples, ID
- Average cloud cover in September: 25
The month with the most cloud cover is January (Cloud cover 62).
The month with the least cloud cover is August (Cloud cover 15).
Average visibility in September
Naples, ID
- Average visibility in September: 6mi
The months with the highest visibility are May, June, July, August and September (6mi).
The month with the lowest visibility is January (2mi).
Naples, Idaho, USA
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