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
As August shifts into September, a minor alteration in temperatures is observed, with average highs reducing from a tropical 86.5°F (30.3°C) to a moderately hot 81.1°F (27.3°C). A notable decrease from the day's highest temperature marks September, culminating in an average low of 53.8°F (12.1°C).Heat index
September's average heat index is estimated at 80.6°F (27°C). Constant exposure and activity lead to possible fatigue. Prolonged exercise may result in heat cramps.Records show heat index calculations are tailored for shaded regions and mild winds. Heat index values may surge by up to 15 Fahrenheit (8 Celsius) degrees in the presence of direct sunlight.
Note: The heat index, also known as 'feels like' or 'apparent temperature', gauges the sensation of temperature factoring in the air's moisture content. Elements such as metabolic variations, pregnancy, and physical exertion can influence one's weather perception. Bear in mind that direct sunshine exposure increases weather impact, and may raise heat index by up to 15 Fahrenheit (8 Celsius) degrees. Heat index values remain especially vital for babies and toddlers. Children often do not understand the need to rest and hydrate. Thirst is a late manifestation of dehydration - therefore, it is essential to stay hydrated, particularly during prolonged physical activities.
Humidity
In September, the average relative humidity is 41%.Rainfall
In September, the rain falls for 3 days. Throughout September, 0.43" (11mm) of precipitation is 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 12h and 26min.On the first day of September, sunrise is at 6:33 am and sunset at 7:34 pm. On the last day of the month, 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, the average daily maximum UV index in September is 5. A UV Index reading of 3 to 5 represents a medium vulnerability from unsafe exposure to UV radiation for ordinary individuals.Note: An average maximum UV index of 5 in September leads to these recommendations:
Exercise prevention - Protecting skin and eyes from harm is required. Considering the harmful UV rays from the Sun during midday, it's essential to reduce exposure. Employ a hat with a wide brim for robust protection, cutting UV exposure by half.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What is the temperature in September?
What is the average humidity in September?
How many days does it rain in September?
When it does not snow?
How many hours of daylight does Nevada City have in September?
What time are sunrise and sunset in September?
How long on average sun shines in September?
What is the UV index intensity in September?
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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