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 brings a drop in Gannett's average high-temperature, falling from a warm 77.2°F (25.1°C) in August to a refreshing 66.9°F (19.4°C). Gannett reports an average nighttime low-temperature of 45.7°F (7.6°C) in September.Humidity
In September, the average relative humidity in Gannett is 41%.Rainfall
In Gannett, in September, it is raining for 4.2 days, with typically 0.28" (7mm) of accumulated precipitation. Throughout the year, there are 85.1 rainfall days, and 12.01" (305mm) of precipitation is accumulated.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 0.08" (2mm) of snow. In Gannett, during the entire year, snow falls for 72.5 days and aggregates up to 57.05" (1449mm) of snow.Daylight
The average length of the day in September in Gannett is 12h and 29min.On the first day of the month, sunrise is at 7:01 am and sunset at 8:11 pm. On the last day of September, sunrise is at 7:33 am and sunset at 7:18 pm MDT.
Sunshine
In Gannett, the average sunshine in September is 9.5h.UV index
The average daily maximum UV index in September is 4. A UV Index value of 3 to 5 symbolizes a moderate health risk from exposure to the Sun's UV rays for the average person.Note: The maximum daily UV index of 4 in September interprets into the following recommendations:
Ensure safety - Imperative it is to shield skin and eyes from damage. The Sun's most intense and consequently most harmful UV radiation during midday hours should be decreased by minimizing exposure and seeking shade. Using UVA and UVB-protective sunglasses and sun-protective clothing is effective against UV radiation. Take careful note! The UV radiation of the Sun can be nearly doubled by snow reflection.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What are September temperatures in Gannett?
What is the average humidity in September in Gannett?
How many days does it rain in September in Gannett?
When does it start to snow in Gannett?
What is the average length of the day in September in Gannett?
When are sunrise and sunset in September in Gannett?
How long on average sun shines in September in Gannett?
What is the UV index reading in September in Gannett?
Average temperature in September
Gannett, ID
- Average high temperature in September: 66.9°F
The warmest month (with the highest average high temperature) is July (77.7°F).
The month with the lowest average high temperature is December (25.7°F).
- Average low temperature in September: 45.7°F
The months with the highest average low temperature are July and August (52.3°F).
The coldest month (with the lowest average low temperature) is January (9.5°F).
Average pressure in September
Gannett, ID
- Average pressure in September: 29.95"Hg
The month with the highest atmospheric pressure is January (30.28"Hg).
The month with the lowest atmospheric pressure is June (29.89"Hg).
Average wind speed in September
Gannett, ID
- Average wind speed in September: 6.4mph
The windiest month (with the highest average wind speed) is July (7.3mph).
The calmest month (with the lowest average wind speed) is December (4.7mph).
Average humidity in September
Gannett, ID
- Average humidity in September: 41%
The month with the highest relative humidity is February (86%).
The month with the lowest relative humidity is August (34%).
Average rainfall in September
Gannett, ID
- Average rainfall in September: 0.28"
The wettest month (with the highest rainfall) is February (1.77").
The driest month (with the least rainfall) is July (0.2").
Average rainfall days in September
Gannett, ID
- Average rainfall days in September: 4.2 days
The month with the highest number of rainy days is May (12.8 days).
The month with the least rainy days is August (3.4 days).
Average snowfall in September
Gannett, ID
- Average snowfall in September: 0.08"
The month with the highest snowfall is February (13.74").
The months with the least snowfall are June, July and August (0").
Average snowfall days in September
Gannett, ID
- Average snowfall days in September: 0.2 days
The month with the highest number of snowfall days is December (14.2 days).
The months with the least snowfall days are July and August (0 days).
Average daylight in September /
Average sunshine in September
Gannett, ID
- Average daylight in September: 12h and 3min
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 3min
The month with the most sunshine is July (Average sunshine: 12h and 6min).
The month with the least sunshine is January (Average sunshine: 5h and 36min).
Average sunshine days in September
Gannett, ID
- Average sunshine days in September: 24.6 days
The month with the most sunshine days is August (25.8 days).
The month with the least sunshine days is April (12.4 days).
Average UV index in September
Gannett, ID
- Average UV index in September: 4
The month with the highest UV index is July (UV index 6).
The month with the lowest UV index is February (UV index 1).
Average cloud cover in September
Gannett, ID
- Average cloud cover in September: 14
The month with the most cloud cover is February (Cloud cover 44).
The month with the least cloud cover is July (Cloud cover 9).
Average visibility in September
Gannett, ID
- Average visibility in September: 6mi
The months with the highest visibility are April, May, June, July, August, September, October and November (6mi).
The months with the lowest visibility are January and February (4mi).
Gannett, Idaho, USA
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