September weather forecastYolo, CA
September
Weather in September
September, the first month of the autumn in Yolo, is still a hot month, with an average temperature fluctuating between 88.9°F (31.6°C) and 59.4°F (15.2°C).Temperature
With the transition into September, Yolo notes an average high-temperature of a still tropical 88.9°F (31.6°C), closely resembling August. In September, the temperature sees a substantial plunge from daytime highs to a low average of 59.4°F (15.2°C).Heat index
The average heat index in September is computed to be a hot 89.6°F (32°C). With ongoing exposure and activity, one might experience weariness, and heat cramps could ensue.Given the heat index, its values are aligned with shaded sites and gentle winds. The heat index may scale up by 15 Fahrenheit (8 Celsius) degrees with direct sun exposure.
Note: The heat index, also known as 'real feel' or 'felt air temperature', is the outcome of merging air's temperature and its humidity metrics. Additional elements including metabolic differences, the level of physical activity, and attire have a role in shaping the individual's temperature perception. It is important to note that direct sunlight can intensify the weather impact, potentially raising the heat index by 15 Fahrenheit (8 Celsius) degrees. Heat index values remain especially vital for babies and toddlers. Children often fail to recognize the requirement to rest and rehydrate. Thirst, being a late symptom of dehydration, underlines the importance of maintaining hydration, especially during ongoing physical activities.
Humidity
With an average relative humidity of 43%, September is the least humid month in Yolo.Rainfall
In September, in Yolo, the rain falls for 1.6 days. Throughout September, 0.08" (2mm) of precipitation is accumulated. In Yolo, California, during the entire year, the rain falls for 67.1 days and collects up to 12.09" (307mm) of precipitation.Daylight
In Yolo, California, the average length of the day in September is 12h and 25min.On the first day of September in Yolo, sunrise is at 6:37 am and sunset at 7:36 pm. On the last day of the month, sunrise is at 7:02 am and sunset at 6:50 pm PDT.
Sunshine
In September, the average sunshine in Yolo is 11.2h.UV index
In Yolo, the average daily maximum UV index in September is 5. A UV Index value of 3 to 5 symbolizes a moderate threat to health from unsafe exposure to UV radiation for ordinary individuals.Note: The daily high UV index of 5 during September translates into the following recommendations:
Ensure safety - Sun damage prevention is strongly urged. The Sun's UV radiation is especially harmful around midday, so reduce exposure and stay safe. Equip yourself with UVA and UVB-filtering sunglasses on clear, sunny days.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in September
Yolo, CA
- Average high temperature in September: 88.9°F
The warmest month (with the highest average high temperature) is July (94.6°F).
The month with the lowest average high temperature is December (54.5°F).
- Average low temperature in September: 59.4°F
The months with the highest average low temperature are August and September (59.4°F).
The coldest month (with the lowest average low temperature) is December (41.2°F).
Average pressure in September
Yolo, CA
- Average pressure in September: 29.92"Hg
The month with the highest atmospheric pressure is January (30.15"Hg).
The month with the lowest atmospheric pressure is June (29.9"Hg).
Average wind speed in September
Yolo, CA
- Average wind speed in September: 4.7mph
The windiest month (with the highest average wind speed) is February (6.1mph).
The calmest month (with the lowest average wind speed) is September (4.7mph).
Average humidity in September
Yolo, CA
- Average humidity in September: 43%
The month with the highest relative humidity is March (75%).
The month with the lowest relative humidity is September (43%).
Average rainfall in September
Yolo, CA
- Average rainfall in September: 0.08"
The wettest month (with the highest rainfall) is February (2.44").
The driest months (with the least rainfall) are July and August (0.04").
Average rainfall days in September
Yolo, CA
- Average rainfall days in September: 1.6 days
The month with the highest number of rainy days is March (11.9 days).
The month with the least rainy days is July (0.8 days).
Average daylight in September /
Average sunshine in September
Yolo, CA
- Average daylight in September: 12h and 24min
The month with the longest days is June (Average daylight: 14h and 48min).
The month with the shortest days is December (Average daylight: 9h and 30min).
- Average sunshine in September: 11h and 12min
The month with the most sunshine is July (Average sunshine: 12h and 6min).
The month with the least sunshine is December (Average sunshine: 5h and 48min).
Average sunshine days in September
Yolo, CA
- Average sunshine days in September: 27.9 days
The month with the most sunshine days is July (29.8 days).
The month with the least sunshine days is March (18.2 days).
Average UV index in September
Yolo, CA
- Average UV index in September: 5
The months with the highest UV index are June and July (UV index 7).
The months with the lowest UV index are January, February, November and December (UV index 3).
Average cloud cover in September
Yolo, CA
- Average cloud cover in September: 8
The month with the most cloud cover is March (Cloud cover 37).
The month with the least cloud cover is July (Cloud cover 4).
Average visibility in September
Yolo, 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).
