September weather forecastTwain Harte, CA
September
Weather in September
The first month of the autumn, September, is still a warm month in Twain Harte, California, with an average temperature varying between 81.9°F (27.7°C) and 56.1°F (13.4°C).Temperature
The arrival of September correlates with a minor temperature reduction, down from August's hot 87.4°F (30.8°C) to a warm 81.9°F (27.7°C). In September, Twain Harte experiences a significant drop from daily zeniths to an average nighttime temperature of 56.1°F (13.4°C).Humidity
In Twain Harte, California, the average relative humidity in September is 36%.Rainfall
In Twain Harte, in September, it is raining for 2.9 days, with typically 0.24" (6mm) of accumulated precipitation. In Twain Harte, California, during the entire year, the rain falls for 77.4 days and collects up to 29.06" (738mm) of precipitation.Snowfall
June through October are months without snowfall in Twain Harte.Daylight
In September, the average length of the day is 12h and 25min.On the first day of the month, sunrise is at 6:31 am and sunset at 7:29 pm. On the last day of September, sunrise is at 6:56 am and sunset at 6:44 pm PDT.
Sunshine
In September, the average sunshine in Twain Harte is 11.3h.UV index
The average daily maximum UV index in September in Twain Harte is 5. A UV Index of 3 to 5 symbolizes a medium vulnerability from unsafe exposure to UV radiation for the average person.Note: A maximum high daily UV index of 5 during September translates into the following directions:
Make use of precautions - It is urged to ward off sun damage. Sun exposure should be minimized, especially during midday, to avoid harmful UV radiation. Prioritize a wide-brim hat for comprehensive sun defense for your face, neck, eyes, and ears.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in September
Twain Harte, CA
- Average high temperature in September: 81.9°F
The warmest month (with the highest average high temperature) is July (88.3°F).
The month with the lowest average high temperature is December (50.4°F).
- Average low temperature in September: 56.1°F
The month with the highest average low temperature is July (60.4°F).
The coldest month (with the lowest average low temperature) is December (34.3°F).
Average pressure in September
Twain Harte, CA
- Average pressure in September: 29.93"Hg
The month with the highest atmospheric pressure is January (30.16"Hg).
The month with the lowest atmospheric pressure is June (29.91"Hg).
Average wind speed in September
Twain Harte, CA
- Average wind speed in September: 5.2mph
The windiest months (with the highest average wind speed) are February and March (5.8mph).
The calmest month (with the lowest average wind speed) is November (4.8mph).
Average humidity in September
Twain Harte, CA
- Average humidity in September: 36%
The month with the highest relative humidity is March (70%).
The months with the lowest relative humidity are July and August (33%).
Average rainfall in September
Twain Harte, CA
- Average rainfall in September: 0.24"
The wettest month (with the highest rainfall) is March (5.47").
The driest months (with the least rainfall) are July and August (0.04").
Average rainfall days in September
Twain Harte, CA
- Average rainfall days in September: 2.9 days
The month with the highest number of rainy days is March (13.3 days).
The month with the least rainy days is August (1.6 days).
Average snowfall in September
Twain Harte, CA
- Average snowfall in September: 0"
The month with the highest snowfall is February (12.87").
The months with the least snowfall are June, July, August, September and October (0").
Average snowfall days in September
Twain Harte, CA
- Average snowfall days in September: 0 days
The months with the highest number of snowfall days are February and March (3.7 days).
The months with the least snowfall days are June, July, August, September and October (0 days).
Average daylight in September /
Average sunshine in September
Twain Harte, 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 36min).
- Average sunshine in September: 11h and 18min
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 6min).
Average sunshine days in September
Twain Harte, CA
- Average sunshine days in September: 26.6 days
The month with the most sunshine days is August (28.3 days).
The month with the least sunshine days is March (15.6 days).
Average UV index in September
Twain Harte, CA
- Average UV index in September: 5
The month with the highest UV index is July (UV index 7).
The months with the lowest UV index are February and November (UV index 2).
Average cloud cover in September
Twain Harte, CA
- Average cloud cover in September: 7
The month with the most cloud cover is March (Cloud cover 35).
The months with the least cloud cover are July and August (Cloud cover 5).
Average visibility in September
Twain Harte, 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).
