September weather forecast and climate
Somerset, CA

Weather in September

The first month of the autumn, September, is also a moderately hot month in Somerset, California, with average temperature fluctuating between 54.5°F (12.5°C) and 82.4°F (28°C).

Temperature

In September, the average high-temperature slightly decreases, from a hot 88.3°F (31.3°C) in August, to a moderately hot 82.4°F (28°C). In Somerset, in September, the average low-temperature is 54.5°F (12.5°C).

Heat index

In September, the average heat index is appraised at 82°F (27.8°C). Constant exposure and activity lead to possible fatigue. Prolonged exercise may result in heat cramps.
Take into consideration that the heat index values are calculated for shade and light wind conditions. With the exposure to direct sunlight, the heat index may be increased by up to 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'felt air temperature', 'feels like', 'real feel', or 'apparent temperature', is a measure of how hot it feels when the actual air humidity is factored in. This effect is individual, with diverse people perceiving weather differently for numerous reasons (differences in body mass, height, and shape, metabolic differences, clothing), and activity. Be aware that direct exposure to sunlight increases heat impact, and may raise the heat index additionally, by up to 15 Fahrenheit (8 Celsius) degrees. Heat index values are especially crucial for babies and toddlers. Children are often less aware of the need to rest and re-hydrate. Thirst is a late sign of dehydration - it is vital to remain hydrated, particularly during prolonged physical activities.

Humidity

The average relative humidity in Somerset is 42%.

Rainfall

In September, the rain falls for 2.6 days. Throughout September, 0.28" (7mm) of precipitation is accumulated. In Somerset, during the entire year, the rain falls for 86.4 days and collects up to 29.69" (754mm) of precipitation.

Snowfall

In Somerset snow does not fall in May through October.

Daylight

In Somerset, the average length of the day is 12.4h.

Sunshine

The average sunshine in Somerset is 11.3h.

UV index

The average daily maximum UV index in September is 5. A UV Index estimate of 3 to 5 represents a moderate threat to health from unprotected exposure to the Sun's UV rays for the average person.
Note: The average daily UV index of 5 transform into the following instructions:
Take precautions - Protection against sunburn is recommended. The Sun's most intense and consequently most harmful UV radiation during midday hours should be decreased by minimizing exposure and seeking shade. A wide-brim hat offers excellent sun protection for eyes, ears, face, and neck. Sunglasses with UVA and UVB protection significantly reduce eye damage from sun exposure. Tightly woven, loose-fitting clothes provide additional protection from the Sun.
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FAQ

What is the temperature in September in Somerset?

In Somerset, in September, the average high-temperature is 82.4°F (28°C), and the average low-temperature is 54.5°F (12.5°C). The average heat index (a.k.a. 'apparent temperature', 'feels like'), that takes the relative humidity and factores it into the air temperature reading, in September is estimated at 82°F (27.8°C).

What is the average humidity in September in Somerset?

The average relative humidity in September in Somerset, California, is 42%.

How much does it rain in Somerset in September?

In Somerset, during September, the rain falls for 2.6 days and regularly aggregates up to 0.28" (7mm) of precipitation.

When it does not snow in Somerset?

In Somerset, California, snow does not fall in May through October.

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

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

How long on average sun shines in September in Somerset?

The average sunshine in September in Somerset, California, is 11.3h.

What is the UV index reading in September in Somerset?

In September, the average daily maximum UV index in Somerset, California, is 5. A UV Index reading of 3 to 5 represents a medium hazard to health from unprotected exposure to the UV radiation.

Average temperature in September
Somerset, CA

Average temperature in September - Somerset, CA
  • Average high temperature in September: 82.4°F

The warmest month (with the highest average high temperature) is July (88.9°F).
The month with the lowest average high temperature is December (50.7°F).

  • Average low temperature in September: 54.5°F

The month with the highest average low temperature is July (57.7°F).
The coldest month (with the lowest average low temperature) is December (36°F).

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Average pressure in September
Somerset, CA

Average pressure in September - Somerset, CA
  • Average pressure in September: 29.93"

The month with the highest atmospheric pressure is January (30.16").
The month with the lowest atmospheric pressure is June (29.9").

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Average wind speed in September
Somerset, CA

Average wind speed in September - Somerset, CA
  • Average wind speed in September: 4.6mph

The windiest month (with the highest average wind speed) is February (6mph).
The calmest month (with the lowest average wind speed) is August (4.2mph).

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Average humidity in September
Somerset, CA

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

The month with the highest relative humidity is March (76%).
The month with the lowest relative humidity is July (39%).

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Average rainfall in September
Somerset, CA

Average rainfall in September - Somerset, CA
  • Average rainfall in September: 0.28"

The wettest month (with the highest rainfall) is March (5.98").
The driest month (with the least rainfall) is July (0").

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Average rainfall days in September
Somerset, CA

Average rainfall days in September - Somerset, CA
  • Average rainfall days in September: 2.6 days

The month with the highest number of rainy days is March (15.6 days).
The month with the least rainy days is July (0.9 days).

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Average snowfall in September
Somerset, CA

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

The month with the highest snowfall is February (5.16").
Months with the least snowfall are May, June, July, August, September and October (0").

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Average snowfall days in September
Somerset, CA

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

The month with the highest number of snowfall days is February (2.5 days).
Months with the least snowfall days are May, June, July, August, September and October (0 days).

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

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

The month with the longest days is June (Average daylight: 14.8h).
The month with the shortest days is December (Average daylight: 9.5h).

  • Average sunshine in September: 11.3h

The month with the most sunshine is July (Average sunshine: 12.2h).
The month with the least sunshine is December (Average sunshine: 5.9h).

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Average sunshine days in September
Somerset, CA

Average sunshine days in September - Somerset, CA
  • Average sunshine days in September: 26.9 days

The month with the most sunshine days is July (29.8 days).
The month with the least sunshine days is March (13.8 days).

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Average UV index in September
Somerset, CA

Average UV index in September - Somerset, CA
  • Average UV index in September: 5

Months with the highest UV index are June, July and August (UV index 6).
The month with the lowest UV index is November (UV index 2).

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Average cloud cover in September
Somerset, CA

Average cloud cover in September - Somerset, CA
  • Average cloud cover in September: 8

The month with the most cloud cover is March (Cloud cover 39).
The month with the least cloud cover is July (Cloud cover 4).

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Average visibility in September
Somerset, CA

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

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

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