September weather forecastSpreckels, CA
September
Weather in September
September, the first month of the autumn in Spreckels, is still a warm month, with an average temperature fluctuating between 76.1°F (24.5°C) and 54.7°F (12.6°C).Temperature
Spreckels's peak temperatures tend to occur in August and September, with an average high-temperature of 76.1°F (24.5°C).Humidity
In September, the average relative humidity is 67%.Rainfall
In Spreckels, in September, it is raining for 2.2 days, with typically 0.08" (2mm) of accumulated precipitation. In Spreckels, during the entire year, the rain falls for 57.8 days and collects up to 6.57" (167mm) of precipitation.Daylight
In September, the average length of the day is 12h and 24min.On the first day of the month, sunrise is at 6:38 am and sunset at 7:34 pm. On the last day of September, in Spreckels, sunrise is at 7:01 am and sunset at 6:50 pm PDT.
Sunshine
In September, the average sunshine in Spreckels, California, is 11.2h.UV index
June through September, with an average maximum UV index of 5, are months with the highest UV index in Spreckels. A UV Index estimate of 3 to 5 represents a moderate threat to health from exposure to the Sun's UV rays for the average person.Note: In September, the maximum UV index of 5 suggests these recommendations:
Preventative actions are necessary - Suggestions to safeguard against sun damage are in order. The midday Sun can be harmful due to its potent UV radiation; seek shade and reduce exposure. For excellent sun protection for the eyes, ears, face, and neck, consider a wide-brim hat.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in September
Spreckels, CA
- Average high temperature in September: 76.1°F
The warmest months (with the highest average high temperature) are August and September (76.1°F).
The month with the lowest average high temperature is December (57.6°F).
- Average low temperature in September: 54.7°F
The months with the highest average low temperature are August and September (54.7°F).
The coldest month (with the lowest average low temperature) is December (44.1°F).
Average pressure in September
Spreckels, CA
- Average pressure in September: 29.92"Hg
The month with the highest atmospheric pressure is January (30.13"Hg).
The month with the lowest atmospheric pressure is September (29.92"Hg).
Average wind speed in September
Spreckels, CA
- Average wind speed in September: 5mph
The windiest month (with the highest average wind speed) is May (6.6mph).
The calmest months (with the lowest average wind speed) are August and September (5mph).
Average humidity in September
Spreckels, CA
- Average humidity in September: 67%
The month with the highest relative humidity is March (76%).
The month with the lowest relative humidity is October (66%).
Average rainfall in September
Spreckels, CA
- Average rainfall in September: 0.08"
The wettest month (with the highest rainfall) is December (1.38").
The driest months (with the least rainfall) are June and August (0.04").
Average rainfall days in September
Spreckels, CA
- Average rainfall days in September: 2.2 days
The month with the highest number of rainy days is March (10.5 days).
The month with the least rainy days is August (0.8 days).
Average daylight in September /
Average sunshine in September
Spreckels, CA
- Average daylight in September: 12h and 24min
The month with the longest days is June (Average daylight: 14h and 36min).
The month with the shortest days is December (Average daylight: 9h and 42min).
- Average sunshine in September: 11h and 12min
The months with the most sunshine are July and August (Average sunshine: 12h and 0min).
The month with the least sunshine is December (Average sunshine: 6h and 0min).
Average sunshine days in September
Spreckels, CA
- Average sunshine days in September: 26.7 days
The month with the most sunshine days is August (28.6 days).
The month with the least sunshine days is March (19.2 days).
Average UV index in September
Spreckels, CA
- Average UV index in September: 5
The months with the highest UV index are June, July, August and September (UV index 5).
The months with the lowest UV index are February, November and December (UV index 3).
Average cloud cover in September
Spreckels, CA
- Average cloud cover in September: 10
The month with the most cloud cover is March (Cloud cover 33).
The month with the least cloud cover is July (Cloud cover 8).
Average visibility in September
Spreckels, 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).
