September weather forecastDuncan Corners, CA
September
Weather in September
The first month of the autumn, September, is still a warm month in Duncan Corners, California, with an average temperature ranging between min 63°F (17.2°C) and max 85.5°F (29.7°C).Temperature
In September, the meteorological conditions change slightly, with the average high-temperature moving from a tropical 91°F (32.8°C) in August to a warm 85.5°F (29.7°C). In September, the temperature in Duncan Corners registers a significant dip to an average of 63°F (17.2°C) at night.Humidity
The average relative humidity in September in Duncan Corners, California, is 34%.Rainfall
In September, in Duncan Corners, the rain falls for 3.3 days. Throughout September, 0.28" (7mm) of precipitation is accumulated. In Duncan Corners, during the entire year, the rain falls for 49.8 days and collects up to 5.71" (145mm) of precipitation.Snowfall
May through October are months without snowfall in Duncan Corners.Daylight
In Duncan Corners, the average length of the day in September is 12h and 22min.On the first day of the month, sunrise is at 6:23 am and sunset at 7:15 pm. On the last day of September, in Duncan Corners, sunrise is at 6:44 am and sunset at 6:34 pm PDT.
Sunshine
In September, the average sunshine is 10.7h.UV index
The average daily maximum UV index in September is 5. A UV Index of 3 to 5 symbolizes a medium health hazard from unprotected exposure to Sun's UV rays for the ordinary person.Note: A maximum daily UV index of 5 during September morphs into the following directions:
Take necessary precautions - Suggestions to elude sunburn are provided. The mid-day Sun emits the most powerful UV radiation, so seek shade and minimize exposure. For a sun-safe wardrobe, go for clothes that are tightly woven and generously sized.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in September
Duncan Corners, CA
- Average high temperature in September: 85.5°F
The warmest month (with the highest average high temperature) is July (91.4°F).
The month with the lowest average high temperature is December (54.1°F).
- Average low temperature in September: 63°F
The month with the highest average low temperature is August (67.5°F).
The coldest month (with the lowest average low temperature) is December (38.5°F).
Average pressure in September
Duncan Corners, CA
- Average pressure in September: 29.86"Hg
The month with the highest atmospheric pressure is January (30.11"Hg).
The month with the lowest atmospheric pressure is June (29.83"Hg).
Average wind speed in September
Duncan Corners, CA
- Average wind speed in September: 6.5mph
The windiest months (with the highest average wind speed) are April and May (9.1mph).
The calmest month (with the lowest average wind speed) is January (6.2mph).
Average humidity in September
Duncan Corners, CA
- Average humidity in September: 34%
The month with the highest relative humidity is December (52%).
The month with the lowest relative humidity is August (30%).
Average rainfall in September
Duncan Corners, CA
- Average rainfall in September: 0.28"
The wettest month (with the highest rainfall) is December (1.18").
The driest month (with the least rainfall) is June (0.04").
Average rainfall days in September
Duncan Corners, CA
- Average rainfall days in September: 3.3 days
The month with the highest number of rainy days is March (6.7 days).
The month with the least rainy days is June (0.8 days).
Average snowfall in September
Duncan Corners, CA
- Average snowfall in September: 0"
The month with the highest snowfall is November (1.85").
The months with the least snowfall are May, June, July, August, September and October (0").
Average snowfall days in September
Duncan Corners, CA
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is February (1.4 days).
The months with the least snowfall days are May, June, July, August, September and October (0 days).
Average daylight in September /
Average sunshine in September
Duncan Corners, CA
- Average daylight in September: 12h and 24min
The month with the longest days is June (Average daylight: 14h and 24min).
The month with the shortest days is December (Average daylight: 9h and 54min).
- Average sunshine in September: 10h and 42min
The months with the most sunshine are June and July (Average sunshine: 12h and 6min).
The month with the least sunshine is December (Average sunshine: 7h and 0min).
Average sunshine days in September
Duncan Corners, CA
- Average sunshine days in September: 25.8 days
The month with the most sunshine days is June (28.8 days).
The month with the least sunshine days is February (21.6 days).
Average UV index in September
Duncan Corners, CA
- Average UV index in September: 5
The months with the highest UV index are June, July and August (UV index 7).
The months with the lowest UV index are January, February, November and December (UV index 3).
Average cloud cover in September
Duncan Corners, CA
- Average cloud cover in September: 6
The month with the most cloud cover is December (Cloud cover 21).
The months with the least cloud cover are June, August and September (Cloud cover 6).
Average visibility in September
Duncan Corners, 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).
