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 signals a slight drop in average high-temperature, sliding from August's tropical 91.2°F (32.9°C) to a warm 84.2°F (29°C). Bella Vista experiences a consistent, yet significant, drop from daily highs to a low-temperature of 55.6°F (13.1°C) throughout September.Humidity
In September, the average relative humidity is 39%.Rainfall
In Bella Vista, in September, during 3.5 rainfall days, 0.35" (9mm) of precipitation is typically accumulated. In Bella Vista, during the entire year, the rain falls for 99.5 days and collects up to 30.43" (773mm) of precipitation.Snowfall
In Bella Vista, snow does not fall in April through October.Daylight
In September, the average length of the day is 12h and 27min.On the first day of the month, sunrise is at 6:37 am and sunset at 7:40 pm. On the last day of September, sunrise is at 7:05 am and sunset at 6:52 pm PDT.
Sunshine
The average sunshine in September in Bella Vista is 11.1h.UV index
The average daily maximum UV index in September is 5. A UV Index value of 3 to 5 symbolizes a moderate health risk from unsafe exposure to UV radiation for average individuals.Note: The maximum daily UV index, 5 in September, converts into the following recommendations:
Exercise caution. Those with pale skin may experience burns in less than half an hour. Stay safe from the Sun's strongest UV rays by limiting exposure during midday. A hat with a broad brim is indispensable, filtering out up to half of UV rays.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
How hot is it in September?
What is the average humidity in September?
How much does it rain in September?
When it does not snow?
How many hours of daylight does Bella Vista have in September?
What time are sunrise and sunset in September?
How many hours of sunshine does Bella Vista have in September?
How high is the UV index in September?
Average temperature in September
Bella Vista, CA
- Average high temperature in September: 84.2°F
The warmest month (with the highest average high temperature) is July (92.3°F).
The month with the lowest average high temperature is December (49.3°F).
- Average low temperature in September: 55.6°F
The month with the highest average low temperature is July (61.3°F).
The coldest month (with the lowest average low temperature) is December (35.2°F).
Average pressure in September
Bella Vista, CA
- Average pressure in September: 29.94"Hg
The month with the highest atmospheric pressure is January (30.16"Hg).
The months with the lowest atmospheric pressure are June and August (29.92"Hg).
Average wind speed in September
Bella Vista, CA
- Average wind speed in September: 4.8mph
The windiest months (with the highest average wind speed) are March, April, June and October (5.2mph).
The calmest months (with the lowest average wind speed) are August and November (4.4mph).
Average humidity in September
Bella Vista, CA
- Average humidity in September: 39%
The month with the highest relative humidity is March (76%).
The month with the lowest relative humidity is August (35%).
Average rainfall in September
Bella Vista, CA
- Average rainfall in September: 0.35"
The wettest month (with the highest rainfall) is March (5.91").
The driest month (with the least rainfall) is July (0.08").
Average rainfall days in September
Bella Vista, CA
- Average rainfall days in September: 3.5 days
The month with the highest number of rainy days is March (16.8 days).
The month with the least rainy days is August (1.6 days).
Average snowfall in September
Bella Vista, CA
- Average snowfall in September: 0"
The month with the highest snowfall is December (0.63").
The months with the least snowfall are April, May, June, July, August, September and October (0").
Average snowfall days in September
Bella Vista, CA
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is February (1.1 days).
The months with the least snowfall days are April, May, June, July, August, September and October (0 days).
Average daylight in September /
Average sunshine in September
Bella Vista, CA
- Average daylight in September: 12h and 2min
The month with the longest days is June (Average daylight: 15h and 0min).
The month with the shortest days is December (Average daylight: 9h and 18min).
- Average sunshine in September: 11h and 1min
The month with the most sunshine is July (Average sunshine: 12h and 12min).
The month with the least sunshine is December (Average sunshine: 5h and 30min).
Average sunshine days in September
Bella Vista, CA
- Average sunshine days in September: 25.1 days
The month with the most sunshine days is August (27.3 days).
The month with the least sunshine days is March (12.7 days).
Average UV index in September
Bella Vista, CA
- Average UV index in September: 5
The month with the highest UV index is July (UV index 7).
The months with the lowest UV index are February, November and December (UV index 2).
Average cloud cover in September
Bella Vista, CA
- Average cloud cover in September: 9
The month with the most cloud cover is March (Cloud cover 43).
The months with the least cloud cover are July and August (Cloud cover 5).
Average visibility in September
Bella Vista, CA
- Average visibility in September: 6mi
The months with the highest visibility are January, February, March, April, May, June, July, August, September, October, November and December (6mi).
The months with the lowest visibility are January, February, March, April, May, June, July, August, September, October, November and December (6mi).
Bella Vista, California, USA
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