Contents
- Weather in September
- Frequently asked questions
- Average temperature in September
- Average pressure in September
- Average wind speed in September
- Average humidity in September
- Average rainfall in September
- Average rainfall days in September
- Average daylight in September
- Average sunshine in September
- Average sunshine days in September
- Average UV index in September
- Average cloud cover in September
- Average visibility in September
Weather in September
Temperature
Welcoming September, Duncans Mills notes an average high-temperature of a still warm 79.9°F (26.6°C), nearly consistent with August's 81°F (27.2°C). In September, the temperature sees a substantial plunge from daytime highs to a low average of 53.4°F (11.9°C).Humidity
With an average relative humidity of 62%, September is the least humid month.Rainfall
In Duncans Mills, in September, it is raining for 1.9 days, with typically 0.08" (2mm) of accumulated precipitation. Throughout the year, there are 60.1 rainfall days, and 12.87" (327mm) of precipitation is accumulated.Daylight
The average length of the day in September is 12h and 25min.On the first day of September, sunrise is at 6:42 am and sunset at 7:41 pm. On the last day of the month, sunrise is at 7:07 am and sunset at 6:55 pm PDT.
Sunshine
In September, the average sunshine is 10.8h.UV index
In Duncans Mills, the average daily maximum UV index in September is 5. A UV Index reading of 3 to 5 represents a medium health hazard from unprotected exposure to Sun's UV rays for the average person.Note: The daily high UV index of 5 in September translates into this advice:
Prioritize safety - The need to safeguard skin and eyes from harm is emphasized. For skin protection, it's recommended to minimize Sun exposure during its peak hours around midday. Opt for tightly woven and loose clothing to enhance protection from the Sun.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What are September temperatures?
What is the least humid month?
What is the average humidity in September in Duncans Mills?
How much does it rain in Duncans Mills in September?
What is the average length of the day in September in Duncans Mills?
When are sunrise and sunset in September?
How many hours of sunshine does Duncans Mills have in September?
What is the UV index intensity in September?
Average temperature in September
Duncans Mills, CA
- Average high temperature in September: 79.9°F
The warmest month (with the highest average high temperature) is August (81°F).
The month with the lowest average high temperature is December (56.3°F).
- Average low temperature in September: 53.4°F
The months with the highest average low temperature are August and September (53.4°F).
The coldest month (with the lowest average low temperature) is December (41.4°F).
Average pressure in September
Duncans Mills, CA
- Average pressure in September: 29.92"Hg
The month with the highest atmospheric pressure is January (30.13"Hg).
The months with the lowest atmospheric pressure are June, August and September (29.92"Hg).
Average wind speed in September
Duncans Mills, CA
- Average wind speed in September: 5.3mph
The windiest month (with the highest average wind speed) is May (7.2mph).
The calmest month (with the lowest average wind speed) is November (5mph).
Average humidity in September
Duncans Mills, CA
- Average humidity in September: 62%
The month with the highest relative humidity is March (77%).
The month with the lowest relative humidity is September (62%).
Average rainfall in September
Duncans Mills, CA
- Average rainfall in September: 0.08"
The wettest month (with the highest rainfall) is February (3.27").
The driest months (with the least rainfall) are July and August (0.04").
Average rainfall days in September
Duncans Mills, CA
- Average rainfall days in September: 1.9 days
The month with the highest number of rainy days is March (10.3 days).
The month with the least rainy days is August (0.9 days).
Average daylight in September /
Average sunshine in September
Duncans Mills, CA
- Average daylight in September: 12h and 2min
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: 10h and 5min
The month with the most sunshine is July (Average sunshine: 11h and 48min).
The month with the least sunshine is December (Average sunshine: 5h and 24min).
Average sunshine days in September
Duncans Mills, CA
- Average sunshine days in September: 27.9 days
The month with the most sunshine days is July (28.9 days).
The month with the least sunshine days is February (19.9 days).
Average UV index in September
Duncans Mills, 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
Duncans Mills, CA
- Average cloud cover in September: 12
The month with the most cloud cover is March (Cloud cover 42).
The month with the least cloud cover is July (Cloud cover 11).
Average visibility in September
Duncans Mills, 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).
Duncans Mills, California, USA
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