September weather forecastSanta Ynez, CA
September
Weather in September
September, the first month of the autumn in Santa Ynez, is also a moderately hot month, with an average temperature fluctuating between 79.7°F (26.5°C) and 61.3°F (16.3°C).Temperature
Santa Ynez observes a minor difference in average high-temperatures between August's 82°F (27.8°C) and September's 79.7°F (26.5°C). Throughout September, the average low-temperature records at a comfortable 61.3°F (16.3°C).Humidity
The average relative humidity in September is 55%.Rainfall
In Santa Ynez, during September, the rain falls for 2 days and regularly aggregates up to 0.08" (2mm) of precipitation. Throughout the year, in Santa Ynez, there are 48.3 rainfall days, and 9.84" (250mm) of precipitation is accumulated.Daylight
The average length of the day in September in Santa Ynez is 12h and 23min.On the first day of September, sunrise is at 6:33 am and sunset at 7:26 pm. On the last day of the month, sunrise is at 6:54 am and sunset at 6:45 pm PDT.
Sunshine
In Santa Ynez, the average sunshine in September is 11.2h.UV index
The months with the highest UV index are June through September, with an average maximum UV index of 6. A UV Index estimate of 6 to 7 represents a high health risk from unprotected exposure to Sun's UV rays for the average person.Note: The UV index of 6 in September translates into these instructions:
Take precautions against overexposure. Protection against sun damage is needed. Avoid exposure to the Sun and try to stay in the shade between 10 a.m. and 4 p.m., when UV radiation is most potent, but be aware that parasols or canopies may not offer full protection. Always opt for UVA and UVB-resistant sunglasses on radiant days.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in September
Santa Ynez, CA
- Average high temperature in September: 79.7°F
The warmest month (with the highest average high temperature) is August (82°F).
The month with the lowest average high temperature is December (61°F).
- Average low temperature in September: 61.3°F
The month with the highest average low temperature is August (61.5°F).
The coldest month (with the lowest average low temperature) is February (46.8°F).
Average pressure in September
Santa Ynez, CA
- Average pressure in September: 29.91"Hg
The month with the highest atmospheric pressure is January (30.11"Hg).
The months with the lowest atmospheric pressure are June, August and September (29.91"Hg).
Average wind speed in September
Santa Ynez, CA
- Average wind speed in September: 6.2mph
The windiest months (with the highest average wind speed) are April and May (7.8mph).
The calmest months (with the lowest average wind speed) are July and August (5.8mph).
Average humidity in September
Santa Ynez, CA
- Average humidity in September: 55%
The month with the highest relative humidity is March (64%).
The month with the lowest relative humidity is October (54%).
Average rainfall in September
Santa Ynez, CA
- Average rainfall in September: 0.08"
The wettest month (with the highest rainfall) is January (2.09").
The driest months (with the least rainfall) are June and August (0.04").
Average rainfall days in September
Santa Ynez, CA
- Average rainfall days in September: 2 days
The month with the highest number of rainy days is March (8.5 days).
The month with the least rainy days is August (0.8 days).
Average daylight in September /
Average sunshine in September
Santa Ynez, CA
- Average daylight in September: 12h and 24min
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 12min
The month with the most sunshine is June (Average sunshine: 12h and 6min).
The month with the least sunshine is February (Average sunshine: 6h and 30min).
Average sunshine days in September
Santa Ynez, CA
- Average sunshine days in September: 27.6 days
The month with the most sunshine days is August (29.1 days).
The month with the least sunshine days is February (20.8 days).
Average UV index in September
Santa Ynez, CA
- Average UV index in September: 6
The months with the highest UV index are June, July, August and September (UV index 6).
The month with the lowest UV index is December (UV index 3).
Average cloud cover in September
Santa Ynez, CA
- Average cloud cover in September: 5
The month with the most cloud cover is March (Cloud cover 25).
The months with the least cloud cover are August and September (Cloud cover 5).
Average visibility in September
Santa Ynez, 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).
