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
As September arrives, Butte City's weather displays a decrease in high-temperatures, transitioning from August's moderately hot 79.3°F (26.3°C) to an agreeable 69.3°F (20.7°C). During September, Butte City's temperature falls to a steady low-temperature average of 49.6°F (9.8°C).Humidity
In Butte City, the average relative humidity in September is 38%.Rainfall
In Butte City, in September, during 8 rainfall days, 0.71" (18mm) of precipitation is typically accumulated. Throughout the year, there are 107.2 rainfall days, and 10.31" (262mm) 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 0.16" (4mm) of snow. In Butte City, during the entire year, snow falls for 75.2 days and aggregates up to 35.28" (896mm) of snow.Daylight
The average length of the day in September is 12h and 29min.On the first day of September, sunrise is at 6:57 am and sunset at 8:07 pm. On the last day of the month, sunrise is at 7:30 am and sunset at 7:15 pm MDT.
Sunshine
The average sunshine in September in Butte City is 9.6h.UV index
The average daily maximum UV index in September is 4. A UV Index value of 3 to 5 symbolizes a medium vulnerability from exposure to the Sun's UV rays for ordinary individuals.Note: The daily maximum UV index of 4 in September interprets into the following advice:
Prioritize safety - Recommendations to avert sunburn are shared. To avoid the Sun's strongest rays, limit exposure around the mid-day period. Your best bet for sun defense on the face, eyes, and neck is a hat with a wide brim. Keep in mind! Snow's reflective quality can nearly double the intensity of the Sun's UV radiation.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What is the temperature in September?
What is the average humidity in September?
How many days does it rain in September?
When does it start to snow?
How many hours of daylight does Butte City have in September?
When are sunrise and sunset in September?
How many hours of sunshine does Butte City have in September?
How high is the UV index in September?
Average temperature in September
Butte City, ID
- Average high temperature in September: 69.3°F
The warmest month (with the highest average high temperature) is July (81.1°F).
The month with the lowest average high temperature is December (25.3°F).
- Average low temperature in September: 49.6°F
The month with the highest average low temperature is July (56.8°F).
The coldest month (with the lowest average low temperature) is January (10°F).
Average pressure in September
Butte City, ID
- Average pressure in September: 29.96"Hg
The month with the highest atmospheric pressure is January (30.29"Hg).
The month with the lowest atmospheric pressure is June (29.9"Hg).
Average wind speed in September
Butte City, ID
- Average wind speed in September: 6.8mph
The windiest month (with the highest average wind speed) is June (8mph).
The calmest month (with the lowest average wind speed) is January (4.7mph).
Average humidity in September
Butte City, ID
- Average humidity in September: 38%
The month with the highest relative humidity is January (86%).
The months with the lowest relative humidity are July and August (32%).
Average rainfall in September
Butte City, ID
- Average rainfall in September: 0.71"
The wettest month (with the highest rainfall) is May (1.42").
The driest month (with the least rainfall) is July (0.39").
Average rainfall days in September
Butte City, ID
- Average rainfall days in September: 8 days
The month with the highest number of rainy days is May (15 days).
The month with the least rainy days is July (5.9 days).
Average snowfall in September
Butte City, ID
- Average snowfall in September: 0.16"
The month with the highest snowfall is February (7.2").
The months with the least snowfall are June, July and August (0").
Average snowfall days in September
Butte City, ID
- Average snowfall days in September: 0.2 days
The month with the highest number of snowfall days is February (15.1 days).
The months with the least snowfall days are June, July and August (0 days).
Average daylight in September /
Average sunshine in September
Butte City, 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 4min
The month with the most sunshine is July (Average sunshine: 12h and 0min).
The month with the least sunshine is January (Average sunshine: 5h and 30min).
Average sunshine days in September
Butte City, ID
- Average sunshine days in September: 19.4 days
The month with the most sunshine days is July (20.9 days).
The month with the least sunshine days is May (11.3 days).
Average UV index in September
Butte City, 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
Butte City, ID
- Average cloud cover in September: 15
The month with the most cloud cover is February (Cloud cover 45).
The month with the least cloud cover is July (Cloud cover 10).
Average visibility in September
Butte City, ID
- Average visibility in September: 6mi
The months with the highest visibility are March, April, May, June, July, August, September, October and November (6mi).
The months with the lowest visibility are January and February (4mi).
Butte City, Idaho, USA
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