September weather forecast and climate
Ferndale, CA

Weather in September

September, the first month of the autumn, in Ferndale, is still a pleasant month, with average temperature varying between 52.2°F (11.2°C) and 70.3°F (21.3°C).

Temperature

In September, the average high-temperature is almost the same as in August - a still pleasant 70.3°F (21.3°C). In Ferndale, the average low-temperature is 52.2°F (11.2°C).

Humidity

Months with the lowest humidity are September and October, with an average relative humidity of 75%.

Rainfall

In September, in Ferndale, the rain falls for 4.4 days. Throughout September, 0.55" (14mm) of precipitation is accumulated. In Ferndale, California, during the entire year, the rain falls for 110.4 days and collects up to 28.07" (713mm) of precipitation.

Snowfall

January, March through December are months without snowfall.

Daylight

The average length of the day in Ferndale is 12.4h.

Sunshine

In September, the average sunshine is 10.3h.

UV index

In Ferndale, California, the average daily maximum UV index is 4. A UV Index reading of 3 to 5 represents a medium vulnerability from unprotected exposure to the Sun's UV rays for ordinary individuals.
Note: In September, the average maximum UV index of 4 translate into the following recommendations:
Take precautions - Protection against the skin and eye damage is obliged. The solar radiation is most powerful near the mid-day, so the exposure to the direct Sun should be reduced accordingly. On bright days sunglasses that block both UVA and UVB rays should be worn. A hat with a wide brim is extremely helpful, as it can prevent roughly 50% of UV radiation from reaching the eyes.
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FAQ

What is the temperature in September in Ferndale?

In Ferndale, California, in September, the average high-temperature is 70.3°F (21.3°C), and the average low-temperature is 52.2°F (11.2°C).

What are the least humid months in Ferndale?

September and October, with an average relative humidity of 75%, are the least humid months in Ferndale.

What is the average humidity in September in Ferndale?

The average relative humidity in September in Ferndale, California, is 75%.

How much does it rain in Ferndale in September?

In Ferndale, during September, the rain falls for 4.4 days and regularly aggregates up to 0.55" (14mm) of precipitation.

When it does not snow in Ferndale?

In Ferndale snow does not fall in January, March through December.

How many hours of daylight does Ferndale have in September?

The average length of the day in September in Ferndale, California, is 12.4h.

How long on average sun shines in September in Ferndale?

In September, the average sunshine is 10.3h.

How high is the UV index in September in Ferndale?

In Ferndale, the average daily maximum UV index in September is 4. A UV Index reading of 3 to 5 represents a medium health risk from the exposure to the Sun's UV rays.

Average temperature in September
Ferndale, CA

Average temperature in September - Ferndale, CA
  • Average high temperature in September: 70.3°F

The warmest month (with the highest average high temperature) is August (71.6°F).
Months with the lowest average high temperature are February and December (53.1°F).

  • Average low temperature in September: 52.2°F

The month with the highest average low temperature is August (53.2°F).
The coldest month (with the lowest average low temperature) is February (41.7°F).

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Average pressure in September
Ferndale, CA

Average pressure in September - Ferndale, CA
  • Average pressure in September: 29.97"

The month with the highest atmospheric pressure is January (30.13").
The month with the lowest atmospheric pressure is August (29.96").

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Average wind speed in September
Ferndale, CA

Average wind speed in September - Ferndale, CA
  • Average wind speed in September: 6.4mph

The windiest months (with the highest average wind speed) are March and June (8.3mph).
The calmest month (with the lowest average wind speed) is August (6.2mph).

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Average humidity in September
Ferndale, CA

Average humidity in September - Ferndale, CA
  • Average humidity in September: 75%

Months with the highest relative humidity are February and March (82%).
Months with the lowest relative humidity are September and October (75%).

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Average rainfall in September
Ferndale, CA

Average rainfall in September - Ferndale, CA
  • Average rainfall in September: 0.55"

The wettest month (with the highest rainfall) is December (5.16").
The driest months (with the least rainfall) are July and August (0.12").

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Average rainfall days in September
Ferndale, CA

Average rainfall days in September - Ferndale, CA
  • Average rainfall days in September: 4.4 days

The month with the highest number of rainy days is March (16.8 days).
The month with the least rainy days is August (1.8 days).

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Average snowfall in September
Ferndale, CA

Average snowfall in September - Ferndale, CA
  • Average snowfall in September: 0"

The month with the highest snowfall is February (0.31").
Months with the least snowfall are January, March, April, May, June, July, August, September, October, November and December (0").

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Average snowfall days in September
Ferndale, CA

Average snowfall days in September - Ferndale, CA
  • Average snowfall days in September: 0 days

The month with the highest number of snowfall days is February (0.3 days).
Months with the least snowfall days are January, March, April, May, June, July, August, September, October and November (0 days).

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Average daylight in September /
Average sunshine in September
Ferndale, CA

Average daylight in September / Average sunshine in September - Ferndale, CA
  • Average daylight in September: 12.4h

The month with the longest days is June (Average daylight: 15h).
The month with the shortest days is December (Average daylight: 9.3h).

  • Average sunshine in September: 10.3h

Months with the most sunshine are July and August (Average sunshine: 11.6h).
The month with the least sunshine is December (Average sunshine: 5.1h).

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Average sunshine days in September
Ferndale, CA

Average sunshine days in September - Ferndale, CA
  • Average sunshine days in September: 25.4 days

The month with the most sunshine days is July (28.1 days).
The month with the least sunshine days is March (12.3 days).

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Average UV index in September
Ferndale, CA

Average UV index in September - Ferndale, CA
  • Average UV index in September: 4

Months with the highest UV index are June, July and August (UV index 5).
Months with the lowest UV index are January, February, March, November and December (UV index 3).

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Average cloud cover in September
Ferndale, CA

Average cloud cover in September - Ferndale, CA
  • Average cloud cover in September: 18

The month with the most cloud cover is March (Cloud cover 47).
The month with the least cloud cover is August (Cloud cover 15).

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Average visibility in September
Ferndale, CA

Average visibility in September - Ferndale, CA
  • Average visibility in September: 6mi

Months with the highest visibility are January, February, March, April, May, June, July, September, October, November and December (6mi).
The month with the lowest visibility is August (5mi).

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