September weather forecastWatsonville, CA
September
Weather in September
September, the first month of the autumn in Watsonville, is also a moderately hot month, with temperature in the range of an average low of 54.9°F (12.7°C) and an average high of 77.9°F (25.5°C).Temperature
Watsonville, California, marks the onset of September with an average high-temperature of a still warm 77.9°F (25.5°C), a subtle shift from August's 78.1°F (25.6°C). Watsonville sees a large disparity in day to night temperatures in September, with the night temperature dropping to an average of 54.9°F (12.7°C).Humidity
September and October, with an average relative humidity of 65%, are the least humid months in Watsonville.Rainfall
In September, in Watsonville, the rain falls for 2.5 days. Throughout September, 0.08" (2mm) of precipitation is accumulated. Throughout the year, there are 68.3 rainfall days, and 11.38" (289mm) of precipitation is accumulated.Daylight
In September, the average length of the day in Watsonville is 12h and 24min.On the first day of September in Watsonville, California, sunrise is at 6:38 am and sunset at 7:34 pm. On the last day of the month, sunrise is at 7:02 am and sunset at 6:51 pm PDT.
Sunshine
In Watsonville, the average sunshine in September is 11.3h.UV index
April, June through September, with an average maximum UV index of 5, are months with the highest UV index in Watsonville. A UV Index of 3 to 5 symbolizes a medium health hazard from unsafe exposure to UV radiation for ordinary individuals.Note: A maximum high UV index of 5 in September translates into the following recommendations:
Be vigilant - A duty to shield skin and eyes from injury exists. Avoiding the Sun during its peak radiation time around midday is a healthy practice. Your best bet for sun defense on the face, eyes, and neck is a hat with a wide brim.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in September
Watsonville, CA
- Average high temperature in September: 77.9°F
The warmest month (with the highest average high temperature) is August (78.1°F).
The month with the lowest average high temperature is December (57.9°F).
- Average low temperature in September: 54.9°F
The month with the highest average low temperature is September (54.9°F).
The coldest month (with the lowest average low temperature) is February (43.3°F).
Average pressure in September
Watsonville, 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
Watsonville, CA
- Average wind speed in September: 4.7mph
The windiest months (with the highest average wind speed) are April and May (6mph).
The calmest months (with the lowest average wind speed) are January, August, September, October and November (4.7mph).
Average humidity in September
Watsonville, CA
- Average humidity in September: 65%
The month with the highest relative humidity is March (75%).
The months with the lowest relative humidity are September and October (65%).
Average rainfall in September
Watsonville, CA
- Average rainfall in September: 0.08"
The wettest month (with the highest rainfall) is December (2.13").
The driest months (with the least rainfall) are July and August (0.04").
Average rainfall days in September
Watsonville, CA
- Average rainfall days in September: 2.5 days
The month with the highest number of rainy days is March (12.6 days).
The month with the least rainy days is August (0.8 days).
Average daylight in September /
Average sunshine in September
Watsonville, CA
- Average daylight in September: 12h and 24min
The month with the longest days is June (Average daylight: 14h and 42min).
The month with the shortest days is December (Average daylight: 9h and 42min).
- Average sunshine in September: 11h and 18min
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
Watsonville, CA
- Average sunshine days in September: 27 days
The month with the most sunshine days is August (29.3 days).
The month with the least sunshine days is March (17.6 days).
Average UV index in September
Watsonville, CA
- Average UV index in September: 5
The months with the highest UV index are April, 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
Watsonville, CA
- Average cloud cover in September: 10
The month with the most cloud cover is March (Cloud cover 34).
The month with the least cloud cover is July (Cloud cover 9).
Average visibility in September
Watsonville, 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).
