September weather forecast and climate
Nevada City, CA

Weather in September

September, the first month of the autumn, in Nevada City, is still a warm month, with average temperature fluctuating between 81.1°F (27.3°C) and 53.8°F (12.1°C).

Temperature

In Nevada City, the average high-temperature in September marginally drops, from a tropical 86.5°F (30.3°C) in August, to a moderately hot 81.1°F (27.3°C). In September, the average low-temperature is 53.8°F (12.1°C).

Heat index

In September, the average heat index is calculated to 80.8°F (27.1°C). Exhaustion is likely with prolonged exposure and activity. Sustaining activity 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 'real feel', 'felt air temperature', 'apparent temperature', or 'feels like', is what the temperature feels like to the human body when the air temperature is combined with the relative humidity. This effect is individual, with diverse people perceiving weather differently for numerous reasons (differences in body mass, height, and shape, clothing, metabolic differences), 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

In September, the average relative humidity is 41%.

Rainfall

In Nevada City, in September, during 3 rainfall days, 0.43" (11mm) of precipitation is typically accumulated. Throughout the year, there are 84.7 rainfall days, and 39.02" (991mm) of precipitation is accumulated.

Snowfall

In Nevada City snow does not fall in June through October.

Daylight

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

Sunshine

In September, the average sunshine is 11.2h.

UV index

In September, the average daily maximum UV index in Nevada City is 5. A UV Index estimate of 3 to 5 represents a moderate health risk from unsafe exposure to the UV radiation for the ordinary person.
Note: The daily maximum UV index of 5 interpret into the following advice:
Take precautions - Protection against sun damage is advised. 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.
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FAQ

What is the temperature in September in Nevada City?

In Nevada City, California, in September, the average high-temperature is 81.1°F (27.3°C), and the average low-temperature is 53.8°F (12.1°C). The average heat index (a.k.a. 'felt air temperature', 'apparent temperature'), that represents influence of the relative humidity to air temperaure, in September is evaluated at 80.8°F (27.1°C).

What is the average humidity in September in Nevada City?

The average relative humidity in September in Nevada City is 41%.

How many days does it rain in September in Nevada City?

In Nevada City, California, in September, during 3 rainfall days, 0.43" (11mm) of precipitation is typically accumulated.

When it does not snow in Nevada City?

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

What is the average length of the day in September in Nevada City?

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

How many hours of sunshine does Nevada City have in September?

In Nevada City, the average sunshine in September is 11.2h.

What is the UV index reading in September in Nevada City?

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

Average temperature in September
Nevada City, CA

Average temperature in September - Nevada City, CA
  • Average high temperature in September: 81.1°F

The warmest month (with the highest average high temperature) is July (88°F).
The month with the lowest average high temperature is December (49.1°F).

  • Average low temperature in September: 53.8°F

The month with the highest average low temperature is July (58.5°F).
The coldest month (with the lowest average low temperature) is December (34.7°F).

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Average pressure in September
Nevada City, CA

Average pressure in September - Nevada City, CA
  • Average pressure in September: 29.93"

The month with the highest atmospheric pressure is January (30.17").
The month with the lowest atmospheric pressure is June (29.9").

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Average wind speed in September
Nevada City, CA

Average wind speed in September - Nevada City, CA
  • Average wind speed in September: 5.6mph

The windiest month (with the highest average wind speed) is February (6.3mph).
The calmest month (with the lowest average wind speed) is August (5.2mph).

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Average humidity in September
Nevada City, CA

Average humidity in September - Nevada City, CA
  • Average humidity in September: 41%

The month with the highest relative humidity is March (77%).
The month with the lowest relative humidity is July (37%).

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Average rainfall in September
Nevada City, CA

Average rainfall in September - Nevada City, CA
  • Average rainfall in September: 0.43"

The wettest month (with the highest rainfall) is March (7.83").
The driest month (with the least rainfall) is July (0.04").

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Average rainfall days in September
Nevada City, CA

Average rainfall days in September - Nevada City, CA
  • Average rainfall days in September: 3 days

The month with the highest number of rainy days is March (13.8 days).
The month with the least rainy days is July (1.1 days).

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Average snowfall in September
Nevada City, CA

Average snowfall in September - Nevada City, CA
  • Average snowfall in September: 0"

The month with the highest snowfall is March (18.35").
Months with the least snowfall are June, July, August, September and October (0").

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Average snowfall days in September
Nevada City, CA

Average snowfall days in September - Nevada City, CA
  • Average snowfall days in September: 0 days

The month with the highest number of snowfall days is March (5.3 days).
Months with the least snowfall days are June, July, August, September and October (0 days).

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Average daylight in September /
Average sunshine in September
Nevada City, CA

Average daylight in September / Average sunshine in September - Nevada City, 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: 9.5h).

  • Average sunshine in September: 11.2h

The month with the most sunshine is July (Average sunshine: 12.1h).
The month with the least sunshine is January (Average sunshine: 5.6h).

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Average sunshine days in September
Nevada City, CA

Average sunshine days in September - Nevada City, CA
  • Average sunshine days in September: 26.5 days

The month with the most sunshine days is July (28.9 days).
The month with the least sunshine days is March (13.7 days).

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Average UV index in September
Nevada City, CA

Average UV index in September - Nevada City, CA
  • Average UV index in September: 5

Months with the highest UV index are June, July and August (UV index 6).
Months with the lowest UV index are February, November and December (UV index 2).

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Average cloud cover in September
Nevada City, CA

Average cloud cover in September - Nevada City, CA
  • Average cloud cover in September: 9

The month with the most cloud cover is March (Cloud cover 44).
The month with the least cloud cover is July (Cloud cover 4).

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Average visibility in September
Nevada City, CA

Average visibility in September - Nevada City, CA
  • Average visibility in September: 6mi

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

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