September weather forecastDublin, CA
September
Weather in September
The first month of the autumn, September, is still a warm month in Dublin, California, with an average temperature ranging between min 56.3°F (13.5°C) and max 82°F (27.8°C).Temperature
Dublin marks the onset of September with an average high-temperature of a still moderately hot 82°F (27.8°C), subtly divergent from August's 84.7°F (29.3°C). In Dublin, a significant divergence from daytime highs is recorded, with average lows of 56.3°F (13.5°C) during September nights.Heat index
During September, the heat index is evaluated at 84.2°F (29°C). With prolonged exposure and constant activity, one might feel exhausted and experience heat cramps.Given the heat index, its values are aligned with shaded sites and gentle winds. The heat index values could be amplified by up to 15 Fahrenheit (8 Celsius) degrees in direct sunlight.
Note: The heat index, also known as 'apparent temperature' or 'felt air temperature', is the outcome of merging air's temperature and its humidity metrics. Elements such as metabolic variations, pregnancy, and physical exertion can shape one's weather perception. Always consider that direct sunlight exposure might heighten the heat's effects, pushing the heat index up by 15 Fahrenheit (8 Celsius) degrees. Heat index values hold great significance to children. Young children are more at risk than adults since they tend to sweat less. Moreover, their large skin surface in proportion to their small bodies and the high heat production due to their activities contribute to their vulnerability.
Humidity
The months with the lowest humidity in Dublin are July and September, with an average relative humidity of 56%.Rainfall
In Dublin, in September, during 2.3 rainfall days, 0.12" (3mm) of precipitation is typically accumulated. Throughout the year, in Dublin, there are 70.2 rainfall days, and 10.98" (279mm) of precipitation is accumulated.Daylight
In Dublin, California, the average length of the day in September is 12h and 25min.On the first day of the month, sunrise is at 6:38 am and sunset at 7:36 pm. On the last day of September, in Dublin, sunrise is at 7:03 am and sunset at 6:51 pm PDT.
Sunshine
In Dublin, the average sunshine in September is 11.2h.UV index
In September, the average daily maximum UV index is 5. A UV Index of 3 to 5 symbolizes a medium vulnerability from unprotected exposure to Sun's UV rays for average individuals.Note: In September, the maximum UV index of 5 transforms into these recommendations:
Undertake precautions - It is suggested to shield oneself from sunburn. When the Sun's UV radiation is most intense during midday, it's best to find shade and limit exposure. A wide-brimmed hat is a staple for defending the face, eyes, ears, and neck from the Sun.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in September
Dublin, CA
- Average high temperature in September: 82°F
The warmest month (with the highest average high temperature) is July (85.3°F).
The month with the lowest average high temperature is December (55°F).
- Average low temperature in September: 56.3°F
The month with the highest average low temperature is August (56.7°F).
The coldest month (with the lowest average low temperature) is January (41.5°F).
Average pressure in September
Dublin, CA
- Average pressure in September: 29.92"Hg
The month with the highest atmospheric pressure is January (30.14"Hg).
The months with the lowest atmospheric pressure are June, August and September (29.92"Hg).
Average wind speed in September
Dublin, CA
- Average wind speed in September: 5mph
The windiest month (with the highest average wind speed) is May (6.3mph).
The calmest month (with the lowest average wind speed) is November (4.2mph).
Average humidity in September
Dublin, CA
- Average humidity in September: 56%
The month with the highest relative humidity is March (74%).
The months with the lowest relative humidity are July and September (56%).
Average rainfall in September
Dublin, CA
- Average rainfall in September: 0.12"
The wettest month (with the highest rainfall) is February (2.05").
The driest months (with the least rainfall) are July and August (0.04").
Average rainfall days in September
Dublin, CA
- Average rainfall days in September: 2.3 days
The month with the highest number of rainy days is March (12.4 days).
The month with the least rainy days is August (0.9 days).
Average daylight in September /
Average sunshine in September
Dublin, 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 12min
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
Dublin, CA
- Average sunshine days in September: 27 days
The month with the most sunshine days is August (29 days).
The month with the least sunshine days is March (17.6 days).
Average UV index in September
Dublin, CA
- Average UV index in September: 5
The months with the highest UV index are June, July and August (UV index 6).
The months with the lowest UV index are January, February, November and December (UV index 3).
Average cloud cover in September
Dublin, CA
- Average cloud cover in September: 9
The month with the most cloud cover is March (Cloud cover 35).
The month with the least cloud cover is July (Cloud cover 5).
Average visibility in September
Dublin, 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).
