September weather forecastDel Rio, CA
September
Weather in September
The first month of the autumn, September, is still a hot month in Del Rio, California, with an average temperature ranging between min 59.7°F (15.4°C) and max 90°F (32.2°C).Temperature
With the commencement of September, Del Rio records a moderate temperature decline, with the average high easing from August's very hot 95.5°F (35.3°C) to a tropical 90°F (32.2°C). The anticipated average low-temperature for September, a mild 59.7°F (15.4°C), shows a substantial deviation from the daytime maximums.Heat index
The heat index value during September is estimated at a hot 91.4°F (33°C). Adopt heightened preventive measures, heat exhaustion and heat cramps are probable. Persistent activity could lead to heatstroke.The heat index's values are generally associated with conditions in shade and light breezes. The direct sunshine could escalate the heat index values by 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'feels like' or 'apparent temperature', measures the perceived warmth when incorporating the humidity present in the air. An individual's perception of weather can be influenced by a variety of factors including metabolic differences, being pregnant, and their degree of physical exertion. Being under direct sunshine can magnify the heat experience, possibly pushing up the heat index by 15 Fahrenheit (8 Celsius) degrees. Heat index values are of high significance for children. In general, younger individuals are at greater risk than adults because they tend to sweat less. Also, having a larger skin surface to body size ratio and greater heat production due to their active behavior contribute to this danger.
Humidity
In September, the average relative humidity is 41%.Rainfall
In September, the rain falls for 2 days. Throughout September, 0.08" (2mm) of precipitation is accumulated. In Del Rio, during the entire year, the rain falls for 59.3 days and collects up to 8.23" (209mm) of precipitation.Snowfall
In Del Rio, snow does not fall in January through November.Daylight
The average length of the day in September is 12h and 25min.On the first day of the month, sunrise is at 6:34 am and sunset at 7:32 pm. On the last day of September, sunrise is at 6:59 am and sunset at 6:48 pm PDT.
Sunshine
In September, the average sunshine is 11.5h.UV index
In September, the average daily maximum UV index is 5. A UV Index of 3 to 5 symbolizes a medium health hazard from exposure to the Sun's UV radiation for the ordinary person.Note: In September, the maximum UV index of 5 transforms into these recommendations:
Put precautions into practice - Guidance to elude sunburn is provided. To avoid the Sun's strongest rays, limit exposure around the mid-day period. Loose clothes with a tight weave are optimal for safeguarding yourself against the Sun's rays.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in September
Del Rio, CA
- Average high temperature in September: 90°F
The warmest month (with the highest average high temperature) is July (96.4°F).
The month with the lowest average high temperature is December (55.4°F).
- Average low temperature in September: 59.7°F
The month with the highest average low temperature is July (62.1°F).
The coldest month (with the lowest average low temperature) is December (41°F).
Average pressure in September
Del Rio, CA
- Average pressure in September: 29.93"Hg
The month with the highest atmospheric pressure is January (30.15"Hg).
The month with the lowest atmospheric pressure is June (29.91"Hg).
Average wind speed in September
Del Rio, CA
- Average wind speed in September: 5.7mph
The windiest month (with the highest average wind speed) is June (7.1mph).
The calmest month (with the lowest average wind speed) is November (4.9mph).
Average humidity in September
Del Rio, CA
- Average humidity in September: 41%
The month with the highest relative humidity is January (72%).
The month with the lowest relative humidity is July (37%).
Average rainfall in September
Del Rio, CA
- Average rainfall in September: 0.08"
The wettest month (with the highest rainfall) is March (1.65").
The driest months (with the least rainfall) are July and August (0.04").
Average rainfall days in September
Del Rio, CA
- Average rainfall days in September: 2 days
The month with the highest number of rainy days is March (11.3 days).
The month with the least rainy days is August (0.7 days).
Average snowfall in September
Del Rio, CA
- Average snowfall in September: 0"
The month with the highest snowfall is December (0.04").
The months with the least snowfall are January, February, March, April, May, June, July, August, September, October and November (0").
Average snowfall days in September
Del Rio, CA
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is December (0.1 days).
The months with the least snowfall days are January, February, March, April, May, June, July, August, September, October and November (0 days).
Average daylight in September /
Average sunshine in September
Del Rio, 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 36min).
- Average sunshine in September: 11h and 30min
The month with the most sunshine is July (Average sunshine: 12h and 6min).
The month with the least sunshine is December (Average sunshine: 6h and 0min).
Average sunshine days in September
Del Rio, CA
- Average sunshine days in September: 26.8 days
The month with the most sunshine days is August (29.2 days).
The month with the least sunshine days is March (18.7 days).
Average UV index in September
Del Rio, 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
Del Rio, CA
- Average cloud cover in September: 6
The month with the most cloud cover is March (Cloud cover 33).
The month with the least cloud cover is July (Cloud cover 4).
Average visibility in September
Del Rio, 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).
