Contents
- Weather in September
- Frequently asked questions
- Average temperature in September
- Average pressure in September
- Average wind speed in September
- Average humidity in September
- Average rainfall in September
- Average rainfall days in September
- Average snowfall in September
- Average snowfall days in September
- Average daylight in September
- Average sunshine in September
- Average sunshine days in September
- Average UV index in September
- Average cloud cover in September
- Average visibility in September
Weather in September
Temperature
September's arrival signals a moderate reduction in the average high-temperature, easing from a hot 86.5°F (30.3°C) in August to a warm 81.1°F (27.3°C). Following the sharp contrast to daytime warmth, an average nighttime temperature of 53.8°F (12.1°C) gets registered during September.Heat index
Throughout September, the heat index is computed to be 80.6°F (27°C). Continuing activity during long-lasting exposure might induce tiredness and result in heat cramps.Factoring in the heat index, values are geared towards shaded areas with light breezes. Direct sunshine exposure could raise heat index values by as much as 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'feels like' or 'apparent temperature', reflects the blend of air temperature and relative humidity to give a temperature impression. The influence of weather is personal, with a diverse population experiencing it differently due to differences in body mass, stature, and degree of activity. By being directly under the sun, it's possible for the felt temperature to increase by 15 Fahrenheit (8 Celsius) degrees. Heat index values remain especially vital for babies and toddlers. Kids are usually more vulnerable than adults, given their lesser sweating ability. Along with their larger skin surface relative to their small stature and the excess heat due to their activity, their risk is amplified.
Humidity
In Nevada City, the average relative humidity in September is 41%.Rainfall
In Nevada City, California, in September, during 3 rainfall days, 0.43" (11mm) of precipitation is typically accumulated. Throughout the year, in Nevada City, there are 84.7 rainfall days, and 39.02" (991mm) of precipitation is accumulated.Snowfall
June through October are months without snowfall.Daylight
The average length of the day in September is 12h and 26min.On the first day of the month, sunrise is at 6:33 am and sunset at 7:34 pm. On the last day of September, in Nevada City, sunrise is at 6:59 am and sunset at 6:47 pm PDT.
Sunshine
In September, the average sunshine is 11.2h.UV index
In Nevada City, California, the average daily maximum UV index in September is 5. A UV Index estimate of 3 to 5 represents a moderate health risk from exposure to the Sun's UV rays for the average person.Note: A maximum high daily UV index of 5 during September translates into the following directions:
Be vigilant - A duty to shield skin and eyes from injury exists. The Sun's most intense and consequently most harmful UV radiation during midday hours should be decreased by minimizing exposure and seeking shade. Always opt for UVA and UVB-resistant sunglasses on radiant days.
Frequently asked questions
What is the temperature in September in Nevada City?
What is the average humidity in September in Nevada City?
How many days does it rain in September in Nevada City?
When it does not snow in Nevada City?
How many hours of daylight does Nevada City have in September?
When are sunrise and sunset in September in Nevada City?
How long on average sun shines in September in Nevada City?
How high is the UV index in September in Nevada City?
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).
Average pressure in September
Nevada City, CA
- Average pressure in September: 29.93"Hg
The month with the highest atmospheric pressure is January (30.17"Hg).
The month with the lowest atmospheric pressure is June (29.9"Hg).
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).
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%).
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").
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).
Average snowfall in September
Nevada City, CA
- Average snowfall in September: 0"
The month with the highest snowfall is March (18.35").
The months with the least snowfall are June, July, August, September and October (0").
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).
The months with the least snowfall days are June, July, August, September and October (0 days).
Average daylight in September /
Average sunshine in September
Nevada City, CA
- Average daylight in September: 12h and 2min
The month with the longest days is June (Average daylight: 14h and 54min).
The month with the shortest days is December (Average daylight: 9h and 30min).
- Average sunshine in September: 11h and 1min
The month with the most sunshine is July (Average sunshine: 12h and 6min).
The month with the least sunshine is January (Average sunshine: 5h and 36min).
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).
Average UV index in September
Nevada City, CA
- Average UV index in September: 5
The months with the highest UV index are June, July and August (UV index 6).
The months with the lowest UV index are February, November and December (UV index 2).
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).
Average visibility in September
Nevada City, CA
- Average visibility in September: 6mi
The 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).
Nevada City, California, USA
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