September weather forecastClarksburg, CA
September
Weather in September
The first month of the autumn, September, is still a tropical month in Clarksburg, California, with an average temperature fluctuating between 89.1°F (31.7°C) and 59°F (15°C).Temperature
The commencement of September notes an average high-temperature of a still tropical 89.1°F (31.7°C), exhibiting little difference from the previous month. Clarksburg observes a dramatic plunge from daytime highs in September, settling at an average low-temperature of 59°F (15°C).Heat index
For most parts of September, the heat index is estimated at a tropical 91.4°F (33°C). Heightened safety actions are necessary, heat cramps and heat exhaustion are probable. Persistent activity may lead to heatstroke.Take into consideration that the heat index values are calculated for shade and light wind conditions. Exposure to the direct sun could elevate the heat index by 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'feels like' or 'felt air temperature', is a single figure representing how weather conditions feel when combining temperature and humidity. Factors such as metabolic variation, pregnancy, and physical activity play a role in one's impression of weather. Considering the impact of direct sunlight, it's possible for the heat index to surge by up to 15 Fahrenheit (8 Celsius) degrees. Heat index values remain especially vital for babies and toddlers. Young ones are generally more prone to risk than adults due to their reduced ability to sweat. Their large skin surface area relative to their diminutive bodies and elevated heat production from their activities further enhance this risk.
Humidity
With an average relative humidity of 45%, September is the least humid month in Clarksburg.Rainfall
In Clarksburg, in September, during 2 rainfall days, 0.12" (3mm) of precipitation is typically accumulated. In Clarksburg, during the entire year, the rain falls for 66.9 days and collects up to 8.9" (226mm) of precipitation.Daylight
The average length of the day in September in Clarksburg, California, is 12h and 25min.On the first day of the month, sunrise is at 6:36 am and sunset at 7:35 pm. On the last day of September, in Clarksburg, sunrise is at 7:01 am and sunset at 6:49 pm PDT.
Sunshine
The average sunshine in September in Clarksburg is 11h.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 rays for ordinary individuals.Note: The maximum daily UV index of 5 in September converts into the following recommendations:
Make use of precautions - Shielding skin and eyes from injury is a requirement. The mid-day Sun emits the most powerful UV radiation, so seek shade and minimize exposure. Combat UV radiation's detrimental effects with sun-safe clothing and UV-blocking eyewear.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in September
Clarksburg, CA
- Average high temperature in September: 89.1°F
The warmest month (with the highest average high temperature) is July (94.5°F).
The month with the lowest average high temperature is December (54.5°F).
- Average low temperature in September: 59°F
The month with the highest average low temperature is August (59.2°F).
The coldest months (with the lowest average low temperature) are January and December (41.5°F).
Average pressure in September
Clarksburg, 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
Clarksburg, CA
- Average wind speed in September: 5.2mph
The windiest month (with the highest average wind speed) is February (6.5mph).
The calmest month (with the lowest average wind speed) is November (5mph).
Average humidity in September
Clarksburg, CA
- Average humidity in September: 45%
The month with the highest relative humidity is March (76%).
The month with the lowest relative humidity is September (45%).
Average rainfall in September
Clarksburg, CA
- Average rainfall in September: 0.12"
The wettest month (with the highest rainfall) is February (1.73").
The driest month (with the least rainfall) is August (0.04").
Average rainfall days in September
Clarksburg, CA
- Average rainfall days in September: 2 days
The month with the highest number of rainy days is March (12.4 days).
The month with the least rainy days is July (1.2 days).
Average daylight in September /
Average sunshine in September
Clarksburg, 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 0min
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 24min).
Average sunshine days in September
Clarksburg, CA
- Average sunshine days in September: 27.5 days
The month with the most sunshine days is July (29.8 days).
The month with the least sunshine days is March (17.9 days).
Average UV index in September
Clarksburg, 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
Clarksburg, CA
- Average cloud cover in September: 10
The month with the most cloud cover is March (Cloud cover 41).
The month with the least cloud cover is July (Cloud cover 6).
Average visibility in September
Clarksburg, 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).
