September weather forecastHayfork, CA
September
Weather in September
The first month of the autumn, September, is still a warm month in Hayfork, California, with an average temperature varying between 79.7°F (26.5°C) and 47.1°F (8.4°C).Temperature
A mild drop in Hayfork's average high-temperature is observed in September, transitioning from a tropical 86.5°F (30.3°C) in August to a moderately hot 79.7°F (26.5°C). Hayfork's nights during September are marked by a pronounced drop from daytime temperatures, experiencing an average low of 47.1°F (8.4°C).Humidity
In Hayfork, the average relative humidity in September is 55%.Rainfall
In Hayfork, California, in September, it is raining for 3.6 days, with typically 0.39" (10mm) of accumulated precipitation. Throughout the year, there are 99.6 rainfall days, and 25.04" (636mm) of precipitation is accumulated.Snowfall
June through October are months without snowfall in Hayfork.Daylight
In September, the average length of the day is 12h and 26min.On the first day of September, sunrise is at 6:40 am and sunset at 7:44 pm. On the last day of the month, sunrise is at 7:09 am and sunset at 6:55 pm PDT.
Sunshine
The average sunshine in September is 10.7h.UV index
The average daily maximum UV index in September is 4. A UV Index reading of 3 to 5 represents a medium vulnerability from unprotected exposure to Sun's UV rays for ordinary individuals.Note: The maximum UV index, 4 during September, leads to the following recommendations:
Take heed. Individuals of lighter complexion can be burned in less than half an hour. Midday Sun has the strongest UV rays, making it crucial to limit exposure and find shade. A wide-brimmed hat provides unparalleled sun protection for sensitive areas like the eyes, ears, and neck.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in September
Hayfork, CA
- Average high temperature in September: 79.7°F
The warmest months (with the highest average high temperature) are July and August (86.5°F).
The month with the lowest average high temperature is December (46°F).
- Average low temperature in September: 47.1°F
The month with the highest average low temperature is July (51.1°F).
The coldest month (with the lowest average low temperature) is December (30.2°F).
Average pressure in September
Hayfork, CA
- Average pressure in September: 29.95"Hg
The month with the highest atmospheric pressure is January (30.15"Hg).
The month with the lowest atmospheric pressure is August (29.93"Hg).
Average wind speed in September
Hayfork, CA
- Average wind speed in September: 3.6mph
The windiest month (with the highest average wind speed) is April (4.8mph).
The calmest month (with the lowest average wind speed) is August (3.3mph).
Average humidity in September
Hayfork, CA
- Average humidity in September: 55%
The month with the highest relative humidity is March (81%).
The month with the lowest relative humidity is August (52%).
Average rainfall in September
Hayfork, CA
- Average rainfall in September: 0.39"
The wettest month (with the highest rainfall) is December (4.17").
The driest month (with the least rainfall) is July (0.16").
Average rainfall days in September
Hayfork, CA
- Average rainfall days in September: 3.6 days
The month with the highest number of rainy days is March (15.3 days).
The month with the least rainy days is August (2.3 days).
Average snowfall in September
Hayfork, CA
- Average snowfall in September: 0"
The month with the highest snowfall is February (7.52").
The months with the least snowfall are June, July, August, September and October (0").
Average snowfall days in September
Hayfork, CA
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is February (5 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
Hayfork, CA
- Average daylight in September: 12h and 24min
The month with the longest days is June (Average daylight: 15h and 0min).
The month with the shortest days is December (Average daylight: 9h and 18min).
- Average sunshine in September: 10h and 42min
The months with the most sunshine are July and August (Average sunshine: 11h and 54min).
The month with the least sunshine is December (Average sunshine: 4h and 42min).
Average sunshine days in September
Hayfork, CA
- Average sunshine days in September: 25.3 days
The month with the most sunshine days is July (26 days).
The month with the least sunshine days is March (13.6 days).
Average UV index in September
Hayfork, CA
- Average UV index in September: 4
The months with the highest UV index are June and July (UV index 6).
The months with the lowest UV index are January, February, November and December (UV index 2).
Average cloud cover in September
Hayfork, CA
- Average cloud cover in September: 15
The month with the most cloud cover is March (Cloud cover 52).
The month with the least cloud cover is August (Cloud cover 7).
Average visibility in September
Hayfork, CA
- Average visibility in September: 6mi
The months with the highest visibility are May, June, July, August, September and October (6mi).
The months with the lowest visibility are March and December (4mi).
