September weather forecast and climate
Floriston, CA

Weather in September

September, the first month of the autumn, in Floriston, is still a pleasant month, with average temperature ranging between min 44.1°F (6.7°C) and max 70°F (21.1°C).

Temperature

In September, the average high-temperature marginally drops, from a moderately hot 75.9°F (24.4°C) in August, to a pleasant 70°F (21.1°C). In September, in Floriston, the average low-temperature is 44.1°F (6.7°C).

Humidity

In Floriston, the average relative humidity in September is 42%.

Rainfall

In Floriston, in September, during 1.5 rainfall days, 0.16" (4mm) of precipitation is typically accumulated. In Floriston, during the entire year, the rain falls for 34.4 days and collects up to 3.86" (98mm) of precipitation.

Snowfall

Months with snowfall in Floriston are January through June, September through December. September is the first month it typically snows in Floriston. Throughout September, in the average 0.6 snowfall days, it receives 0.2" (5mm) of snow. Throughout the year, there are 38.5 snowfall days, and 10.51" (267mm) of snow is accumulated.

Daylight

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

Sunshine

In September, the average sunshine in Floriston, California, is 11.1h.

UV index

In Floriston, the average daily maximum UV index is 4. A UV Index value of 3 to 5 symbolizes a medium health hazard from unprotected exposure to the Sun's UV rays for the average person.
Note: The daily maximum UV index of 4 interpret into the following advice:
Take precautions - Protection against the skin and eye damage is obliged. The Sun's most intense and consequently most harmful UV radiation during midday hours should be decreased by minimizing exposure and seeking shade. 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. Beware! The strength of the UV rays is increased nearly double-fold by the reflection of the snow.
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FAQ

What is the temperature in September in Floriston?

In Floriston, California, in September, the average high-temperature is 70°F (21.1°C), and the average low-temperature is 44.1°F (6.7°C).

What is the average humidity in September in Floriston?

The average relative humidity in September in Floriston is 42%.

How many days does it rain in September in Floriston?

In Floriston, California, during September, the rain falls for 1.5 days and regularly aggregates up to 0.16" (4mm) of precipitation.

When does it start to snow in Floriston?

September is the first month it typically snows in Floriston, California. Throughout September, in the average 0.6 snowfall days, it receives 0.2" (5mm) of snow.

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

In Floriston, California, the average length of the day in September is 12.4h.

How long on average sun shines in September in Floriston?

In Floriston, California, the average sunshine in September is 11.1h.

What is the UV index reading in September in Floriston?

In September, the average daily maximum UV index is 4. A UV Index value of 3 to 5 symbolizes a medium hazard to health from unsafe exposure to the Sun's UV rays.

Average temperature in September
Floriston, CA

Average temperature in September - Floriston, CA
  • Average high temperature in September: 70°F

The warmest month (with the highest average high temperature) is July (77.5°F).
The month with the lowest average high temperature is December (35.4°F).

  • Average low temperature in September: 44.1°F

The month with the highest average low temperature is July (50.7°F).
The coldest month (with the lowest average low temperature) is December (20.3°F).

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Average pressure in September
Floriston, CA

Average pressure in September - Floriston, CA
  • Average pressure in September: 29.94"

The month with the highest atmospheric pressure is January (30.18").
The month with the lowest atmospheric pressure is June (29.9").

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Average wind speed in September
Floriston, CA

Average wind speed in September - Floriston, CA
  • Average wind speed in September: 5.7mph

The windiest month (with the highest average wind speed) is March (7.3mph).
The calmest month (with the lowest average wind speed) is August (5.4mph).

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Average humidity in September
Floriston, CA

Average humidity in September - Floriston, CA
  • Average humidity in September: 42%

The month with the highest relative humidity is March (78%).
The month with the lowest relative humidity is August (37%).

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Average rainfall in September
Floriston, CA

Average rainfall in September - Floriston, CA
  • Average rainfall in September: 0.16"

The wettest month (with the highest rainfall) is December (0.63").
The driest months (with the least rainfall) are June, August and October (0.12").

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Average rainfall days in September
Floriston, CA

Average rainfall days in September - Floriston, CA
  • Average rainfall days in September: 1.5 days

The month with the highest number of rainy days is May (5.3 days).
The month with the least rainy days is November (1.3 days).

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Average snowfall in September
Floriston, CA

Average snowfall in September - Floriston, CA
  • Average snowfall in September: 0.2"

The month with the highest snowfall is December (2.2").
Months with the least snowfall are July and August (0").

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Average snowfall days in September
Floriston, CA

Average snowfall days in September - Floriston, CA
  • Average snowfall days in September: 0.6 days

The month with the highest number of snowfall days is December (7.3 days).
Months with the least snowfall days are July and August (0 days).

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

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

The month with the longest days is June (Average daylight: 14.9h).
The month with the shortest days is December (Average daylight: 9.4h).

  • Average sunshine in September: 11.1h

The month with the most sunshine is July (Average sunshine: 12h).
Months with the least sunshine are January and December (Average sunshine: 5.8).

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Average sunshine days in September
Floriston, CA

Average sunshine days in September - Floriston, CA
  • Average sunshine days in September: 27.4 days

The month with the most sunshine days is October (28.5 days).
The month with the least sunshine days is May (21.6 days).

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Average UV index in September
Floriston, CA

Average UV index in September - Floriston, 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 2).

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Average cloud cover in September
Floriston, CA

Average cloud cover in September - Floriston, CA
  • Average cloud cover in September: 10

Months with the most cloud cover are March and December (Cloud cover 38).
Months with the least cloud cover are July and August (Cloud cover 8).

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Average visibility in September
Floriston, CA

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

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

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