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 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
Summerland notes an average high-temperature of a still moderately hot 77.2°F (25.1°C) in September, hardly diverging from August. Summerland records a mean low-temperature of 60.4°F (15.8°C) in September.Humidity
In September, the average relative humidity is 54%.Rainfall
In September, the rain falls for 2.5 days. Throughout September, 0.2" (5mm) of precipitation is accumulated. In Summerland, during the entire year, the rain falls for 46.9 days and collects up to 7.83" (199mm) of precipitation.Daylight
In September, the average length of the day is 12h and 22min.On the first day of the month, sunrise is at 6:32 am and sunset at 7:24 pm. On the last day of September, in Summerland, California, sunrise is at 6:52 am and sunset at 6:43 pm PDT.
Sunshine
The average sunshine in September is 11h.UV index
The average daily maximum UV index in September is 5. A UV Index of 3 to 5 symbolizes a medium health hazard from unprotected exposure to Sun's UV rays for the average person.Note: A maximum high daily UV index of 5 during September translates into the following directions:
Make use of precautions - Suggestions to resist sunburn are communicated. Given the potency of the midday Sun's UV radiation, one should avoid prolonged exposure. For a sun-safe wardrobe, go for clothes that are tightly woven and generously sized.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What are September temperatures?
What is the average humidity in September in Summerland?
How much does it rain in September?
What is the average length of the day in September?
When is the sunrise / sunset in September?
How many hours of sunshine does Summerland have in September?
What is the UV index intensity in September?
Average temperature in September
Summerland, CA
- Average high temperature in September: 77.2°F
The warmest month (with the highest average high temperature) is August (79.2°F).
The month with the lowest average high temperature is December (59.4°F).
- Average low temperature in September: 60.4°F
The month with the highest average low temperature is August (61.3°F).
The coldest month (with the lowest average low temperature) is February (45.3°F).
Average pressure in September
Summerland, CA
- Average pressure in September: 29.9"Hg
The month with the highest atmospheric pressure is January (30.11"Hg).
The month with the lowest atmospheric pressure is September (29.9"Hg).
Average wind speed in September
Summerland, CA
- Average wind speed in September: 5mph
The windiest month (with the highest average wind speed) is April (7mph).
The calmest month (with the lowest average wind speed) is August (4.5mph).
Average humidity in September
Summerland, CA
- Average humidity in September: 54%
The month with the highest relative humidity is March (63%).
The months with the lowest relative humidity are October and November (53%).
Average rainfall in September
Summerland, CA
- Average rainfall in September: 0.2"
The wettest months (with the highest rainfall) are February and March (1.46").
The driest months (with the least rainfall) are June and August (0.12").
Average rainfall days in September
Summerland, CA
- Average rainfall days in September: 2.5 days
The month with the highest number of rainy days is March (6.8 days).
The month with the least rainy days is August (1.5 days).
Average daylight in September /
Average sunshine in September
Summerland, CA
- Average daylight in September: 12h and 2min
The month with the longest days is June (Average daylight: 14h and 24min).
The month with the shortest days is December (Average daylight: 9h and 54min).
- Average sunshine in September: 11h and 0min
The months with the most sunshine are June and August (Average sunshine: 12h and 0min).
The month with the least sunshine is February (Average sunshine: 6h and 30min).
Average sunshine days in September
Summerland, CA
- Average sunshine days in September: 23.7 days
The month with the most sunshine days is August (27.3 days).
The month with the least sunshine days is February (21.8 days).
Average UV index in September
Summerland, CA
- Average UV index in September: 5
The months with the highest UV index are June, July and August (UV index 6).
The month with the lowest UV index is December (UV index 3).
Average cloud cover in September
Summerland, CA
- Average cloud cover in September: 6
The month with the most cloud cover is March (Cloud cover 24).
The month with the least cloud cover is August (Cloud cover 5).
Average visibility in September
Summerland, 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).
Summerland, California, USA
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