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 77.5°F (25.3°C) to an agreeable 68.4°F (20.2°C). In September, the temperature sees a substantial plunge from daytime highs to a low average of 43.2°F (6.2°C).Humidity
The average relative humidity in September is 48%.Rainfall
In Bloomington, in September, it is raining for 9.5 days, with typically 1.14" (29mm) of accumulated precipitation. Throughout the year, there are 105.7 rainfall days, and 16.69" (424mm) of precipitation is accumulated.Snowfall
January through June, September through December are months with snowfall in Bloomington. September is the first month it typically snows. 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
The average length of the day in September in Bloomington is 12h and 28min.On the first day of the month, sunrise is at 6:51 am and sunset at 7:58 pm. On the last day of September, sunrise is at 7:22 am and sunset at 7:08 pm MDT.
Sunshine
In September, the average sunshine is 10.1h.UV index
In September, the average daily maximum UV index is 3. A UV Index estimate of 3 to 5 represents a medium health hazard from unprotected exposure to Sun's UV rays for the ordinary person.Note: In September, the maximum UV index of 3 suggests these recommendations:
Make use of precautions - It is urged to ward off sun damage. Midday is the peak time for the Sun's radiation; stay in the shade and protect yourself. Prioritize a wide-brim hat for comprehensive sun defense for your face, neck, eyes, and ears. Watch out! The Sun's UV radiation can be nearly magnified twofold due to snow reflection.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What is the usual temperature for Bloomington in September?
What is the average humidity in September?
How many days does it rain in September?
When does it start snowing?
How many hours of daylight does Bloomington have in September?
When are sunrise and sunset in September?
How many hours of sunshine does Bloomington have in September?
What is the UV index intensity in September?
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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