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 ushers in a slight temperature change, with average high-temperatures reducing from August's moderately hot 79.9°F (26.6°C) to an agreeable 68.5°F (20.3°C). Nightly readings in September display a noticeable downturn from daily highs, with the average low-temperature registering a cold 41.9°F (5.5°C).Humidity
In September, the average relative humidity is 62%.Rainfall
In Kootenai, in September, during 9.5 rainfall days, 0.98" (25mm) of precipitation is typically accumulated. In Kootenai, during the entire year, the rain falls for 151 days and collects up to 23.98" (609mm) of precipitation.Snowfall
Months with snowfall in Kootenai are January through May, September through December. September is the first month it typically snows in Kootenai. Throughout September, in the average 0.2 snowfall days, it receives 0.59" (15mm) of snow. In Kootenai, during the entire year, snow falls for 80.7 days and aggregates up to 61.3" (1557mm) of snow.Daylight
The average length of the day in September is 12h and 34min.On the first day of the month, sunrise is at 6:04 am and sunset at 7:26 pm. On the last day of September, sunrise is at 6:45 am and sunset at 6:26 pm PDT.
Sunshine
In Kootenai, Idaho, the average sunshine in September is 9.7h.UV index
In Kootenai, the average daily maximum UV index in September is 3. A UV Index value of 3 to 5 symbolizes a medium health hazard from unsafe exposure to UV radiation for ordinary individuals.Note: In September, an average UV index of 3 transforms into the following instructions:
Take measures. Individuals with light skin might experience burns in under 30 minutes. Avoiding direct sunlight during midday hours helps reduce the risk from intense UV radiation. On sunny days, it's ideal to wear sunglasses that filter out UVA and UVB rays. Pay attention! The reflection of snow can enhance the Sun's UV radiation almost double.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What is the usual temperature for Kootenai in September?
What is the average humidity in September in Kootenai?
How much does it rain in Kootenai in September?
When does it start snowing in Kootenai?
How many hours of daylight does Kootenai have in September?
What time are sunrise and sunset in September in Kootenai?
How many hours of sunshine does Kootenai have in September?
How high is the UV index in September in Kootenai?
Average temperature in September
Kootenai, ID
- Average high temperature in September: 68.5°F
The warmest month (with the highest average high temperature) is August (79.9°F).
The month with the lowest average high temperature is December (28.9°F).
- Average low temperature in September: 41.9°F
The month with the highest average low temperature is August (48.6°F).
The coldest month (with the lowest average low temperature) is December (18.5°F).
Average pressure in September
Kootenai, 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
Kootenai, ID
- Average wind speed in September: 3.8mph
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
Kootenai, ID
- Average humidity in September: 62%
The month with the highest relative humidity is January (95%).
The month with the lowest relative humidity is August (53%).
Average rainfall in September
Kootenai, ID
- Average rainfall in September: 0.98"
The wettest month (with the highest rainfall) is January (3.35").
The driest month (with the least rainfall) is August (0.43").
Average rainfall days in September
Kootenai, ID
- Average rainfall days in September: 9.5 days
The month with the highest number of rainy days is March (18.8 days).
The month with the least rainy days is August (6.3 days).
Average snowfall in September
Kootenai, ID
- Average snowfall in September: 0.59"
The month with the highest snowfall is January (17.28").
The months with the least snowfall are June, July and August (0").
Average snowfall days in September
Kootenai, ID
- Average snowfall days in September: 0.2 days
The month with the highest number of snowfall days is December (18.2 days).
The months with the least snowfall days are June, July and August (0 days).
Average daylight in September /
Average sunshine in September
Kootenai, ID
- Average daylight in September: 12h and 4min
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 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 18min).
Average sunshine days in September
Kootenai, ID
- Average sunshine days in September: 18.5 days
The months with the most sunshine days are July and August (21.4 days).
The month with the least sunshine days is March (7.9 days).
Average UV index in September
Kootenai, 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
Kootenai, ID
- Average cloud cover in September: 25
The month with the most cloud cover is January (Cloud cover 65).
The month with the least cloud cover is August (Cloud cover 14).
Average visibility in September
Kootenai, 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 and February (3mi).
Kootenai, Idaho, USA
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