September weather forecast
Hayfork, CA

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Weather in September

September, the first month of the autumn in Hayfork, is also a moderately hot month, with an average temperature ranging between max 79.7°F (26.5°C) and min 47.1°F (8.4°C).

Temperature

September's onset introduces a mild reduction in the average high-temperature, from a hot 86.5°F (30.3°C) in August to a warm 79.7°F (26.5°C). Hayfork registers a prominent dip from daytime highs, with an average of 47.1°F (8.4°C) during the nights of September.

Humidity

In September, the average relative humidity is 55%.

Rainfall

In Hayfork, during September, the rain falls for 3.6 days and regularly aggregates up to 0.39" (10mm) of 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.

Daylight

In Hayfork, the average length of the day in September is 12h and 26min.
On the first day of the month, sunrise is at 6:40 am and sunset at 7:44 pm. On the last day of September, sunrise is at 7:09 am and sunset at 6:55 pm PDT.

Sunshine

In Hayfork, California, the average sunshine in September is 10.7h.

UV index

In September, the average daily maximum UV index in Hayfork, California, is 4. A UV Index of 3 to 5 symbolizes a moderate health risk from unsafe exposure to UV radiation for the ordinary person.
Note: During September, 4 as the daily maximum UV index converts into the following advice:
Be mindful. Individuals with a lighter skin tone may suffer burns in less than 30 minutes. Direct Sun exposure should be minimized especially during midday when radiation is most intense. Wearing a wide-brim hat can block approximately 50% of UV radiation, protecting the eyes.

Frequently asked questions

What is the average September temperature in Hayfork?

In September, in Hayfork, the average high-temperature is 79.7°F (26.5°C), and the average low-temperature is 47.1°F (8.4°C). In August, the average heat index (a.k.a. 'real feel', 'felt air temperature'), which represents the influence of relative humidity on air temperature, is appraised at 89.6°F (32°C).

What is the average humidity in September in Hayfork?

In Hayfork, California, the average relative humidity in September is 55%.

How much does it rain in Hayfork in September?

In Hayfork, California, in September, it is raining for 3.6 days, with typically 0.39" (10mm) of accumulated precipitation.

When it does not snow in Hayfork?

In Hayfork, California, snow does not fall in June through October.

What is the average length of the day in September in Hayfork?

In September, the average day length in Hayfork, California, is 12h and 26min.

What time are sunrise and sunset in September in Hayfork?

On the first day of September in Hayfork, California, 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.

How many hours of sunshine does Hayfork have in September?

In September, the average sunshine duration is 10.7h.

What is the UV index reading in September in Hayfork?

The average daily maximum UV index in September in Hayfork is 4. A UV Index value of 3 to 5 symbolizes a moderate vulnerability from unprotected exposure to UV radiation.
Average humidity
Average rainfall days
Average snowfall
Average snowfall days
Average daylight
Average sunshine
Average sunshine days
Average UV index
Average cloud cover
Average visibility

Average temperature in September
Hayfork, CA

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 - 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 - 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 - 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 - 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 - 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 - 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 - 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 / Average sunshine in September - Hayfork, CA
  • Average daylight in September: 12h and 2min

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 4min

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 - 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 - 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 - 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 - 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).

Hayfork, California, USA

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