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 comes with a drop in the average high-temperature, falling from August's moderately hot 77.5°F (25.3°C) to an agreeable 68.4°F (20.2°C). Despite soaring daytime temperatures, Bloomington registers a consistent average low-temperature of 43.2°F (6.2°C) in September.Humidity
In Bloomington, Idaho, the average relative humidity in September is 48%.Rainfall
In September, the rain falls for 9.5 days. Throughout September, 1.14" (29mm) of precipitation is accumulated. In Bloomington, during the entire year, the rain falls for 105.7 days and collects up to 16.69" (424mm) of precipitation.Snowfall
Months with snowfall in Bloomington are January through June, September through December. September is the first month it typically snows in Bloomington. Throughout September, in the average 0.5 snowfall days, it receives 0.12" (3mm) of snow. In Bloomington, during the entire year, snow falls for 104.6 days and aggregates up to 63.58" (1615mm) of snow.Daylight
In September, the average length of the day is 12h and 28min.On the first day of September, sunrise is at 6:51 am and sunset at 7:58 pm. On the last day of the month, sunrise is at 7:22 am and sunset at 7:08 pm MDT.
Sunshine
In September, the average sunshine in Bloomington is 10.1h.UV index
The average daily maximum UV index in September is 3. A UV Index reading of 3 to 5 represents a medium vulnerability from unsafe exposure to UV radiation for the ordinary person.Note: The UV index of 3 during September translates into the following guidance:
Exercise caution. The susceptibility of light skin individuals to burns is less than 30 minutes. Avoiding the Sun during its peak radiation time around midday is a healthy practice. Safeguard your eyes, ears, and face from sun rays with the aid of a wide-brim hat. Attention! Nearly twice the Sun's UV radiation can be reflected by snow.
Frequently asked questions
What is the average September temperature in Bloomington?
What is the average humidity in September in Bloomington?
How much does it rain in Bloomington in September?
When does it start to snow in Bloomington?
What is the average length of the day in September in Bloomington?
What time are sunrise and sunset in September in Bloomington?
How long on average sun shines in September in Bloomington?
How high is the UV index in September in Bloomington?
Average temperature in September
Bloomington, ID
- Average high temperature in September: 68.4°F
The warmest month (with the highest average high temperature) is July (79.2°F).
The month with the lowest average high temperature is December (25.5°F).
- Average low temperature in September: 43.2°F
The month with the highest average low temperature is August (49.8°F).
The coldest month (with the lowest average low temperature) is January (8.4°F).
Average pressure in September
Bloomington, ID
- Average pressure in September: 29.97"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
Bloomington, ID
- Average wind speed in September: 5.5mph
The windiest month (with the highest average wind speed) is June (6mph).
The calmest month (with the lowest average wind speed) is January (4.3mph).
Average humidity in September
Bloomington, ID
- Average humidity in September: 48%
The month with the highest relative humidity is January (92%).
The month with the lowest relative humidity is August (42%).
Average rainfall in September
Bloomington, ID
- Average rainfall in September: 1.14"
The wettest month (with the highest rainfall) is May (2.28").
The driest month (with the least rainfall) is July (0.91").
Average rainfall days in September
Bloomington, ID
- Average rainfall days in September: 9.5 days
The month with the highest number of rainy days is May (15.3 days).
The month with the least rainy days is January (4.3 days).
Average snowfall in September
Bloomington, ID
- Average snowfall in September: 0.12"
The month with the highest snowfall is March (12.17").
The months with the least snowfall are July and August (0").
Average snowfall days in September
Bloomington, ID
- Average snowfall days in September: 0.5 days
The month with the highest number of snowfall days is February (20 days).
The months with the least snowfall days are July and August (0 days).
Average daylight in September /
Average sunshine in September
Bloomington, ID
- Average daylight in September: 12h and 3min
The month with the longest days is June (Average daylight: 15h and 12min).
The month with the shortest days is December (Average daylight: 9h and 12min).
- Average sunshine in September: 10h and 1min
The months with the most sunshine are July and August (Average sunshine: 11h and 48min).
The month with the least sunshine is January (Average sunshine: 4h and 18min).
Average sunshine days in September
Bloomington, ID
- Average sunshine days in September: 17.5 days
The month with the most sunshine days is July (18.4 days).
The month with the least sunshine days is February (8.6 days).
Average UV index in September
Bloomington, ID
- Average UV index in September: 3
The months with the highest UV index are June and July (UV index 5).
The months with the lowest UV index are January, November and December (UV index 1).
Average cloud cover in September
Bloomington, ID
- Average cloud cover in September: 17
The month with the most cloud cover is February (Cloud cover 63).
The months with the least cloud cover are July and August (Cloud cover 13).
Average visibility in September
Bloomington, ID
- Average visibility in September: 6mi
The months with the highest visibility are May, June, July, August, September and October (6mi).
The months with the lowest visibility are January and February (3mi).
Bloomington, Idaho, USA
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