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 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
Upon the onset of September, North Cucamonga witnesses an average high-temperature of a still tropical 88.3°F (31.3°C), showing a close resemblance to the prior month. In September, North Cucamonga experiences a significant drop from daily zeniths to an average nighttime temperature of 63.7°F (17.6°C).Heat index
The heat index value for September is evaluated at a hot 89.6°F (32°C). Uninterrupted activity during exposure could lead to a sense of exhaustion, possibly causing heat cramps.Keep in mind the heat index values are meant for areas in shade and with light wind. Heat index values can rise by 15 Fahrenheit (8 Celsius) degrees when in direct sunlight.
Note: The heat index, also known as 'felt air temperature' or 'feels like', is a composite of temperature and humidity figures to convey how warm it feels. The impact of weather is personal, differing among a variety of people based on differences in body mass, height, and the level of physical exertion. The sun, when shining directly, can have a significant impact on the perceived temperature, increasing the heat index by 15 Fahrenheit (8 Celsius) degrees. Heat index values are particularly important for children. Children typically face more danger than adults as their sweat production is usually lower. Additionally, the bigger skin surface compared to their small size and the increased heat due to their activeness exacerbate the risk.
Humidity
In September, the average relative humidity is 43%.Rainfall
In North Cucamonga, during September, the rain falls for 1.8 days and regularly aggregates up to 0.08" (2mm) of precipitation. Throughout the year, there are 42.3 rainfall days, and 4.53" (115mm) of precipitation is accumulated.Snowfall
January, March through December are months without snowfall.Daylight
In North Cucamonga, the average length of the day in September is 12h and 22min.On the first day of September, sunrise is at 6:24 am and sunset at 7:15 pm. On the last day of the month, sunrise is at 6:44 am and sunset at 6:35 pm PDT.
Sunshine
In September, the average sunshine is 10.7h.UV index
In North Cucamonga, the average daily maximum UV index in September is 6. A UV Index reading of 6 to 7 represents a high health vulnerability from exposure to the Sun's UV radiation for the ordinary person.Note: The daily high UV index of 6 during September translates into the following recommendations:
Fend off overexposure. Sun protection is vital. Stay in the shade and limit direct Sun exposure from 10 a.m. to 4 p.m., a time when UV radiation is particularly strong. Remember, however, that shade structures may not provide complete protection. Combat UV radiation's detrimental effects with sun-safe clothing and UV-blocking eyewear.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Is it hot in North Cucamonga during 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 North Cucamonga have in September?
When are sunrise and sunset in September?
How long on average sun shines in September?
What is the UV index reading in September?
Average temperature in September
North Cucamonga, CA
- Average high temperature in September: 88.3°F
The warmest month (with the highest average high temperature) is August (91.8°F).
The month with the lowest average high temperature is December (61.7°F).
- Average low temperature in September: 63.7°F
The month with the highest average low temperature is August (66.6°F).
The coldest months (with the lowest average low temperature) are February and December (45.3°F).
Average pressure in September
North Cucamonga, CA
- Average pressure in September: 29.88"Hg
The month with the highest atmospheric pressure is January (30.1"Hg).
The month with the lowest atmospheric pressure is June (29.86"Hg).
Average wind speed in September
North Cucamonga, CA
- Average wind speed in September: 4.5mph
The windiest month (with the highest average wind speed) is May (5.9mph).
The calmest month (with the lowest average wind speed) is September (4.5mph).
Average humidity in September
North Cucamonga, CA
- Average humidity in September: 43%
The months with the highest relative humidity are February, March and May (53%).
The month with the lowest relative humidity is August (41%).
Average rainfall in September
North Cucamonga, CA
- Average rainfall in September: 0.08"
The wettest month (with the highest rainfall) is February (0.98").
The driest month (with the least rainfall) is June (0.04").
Average rainfall days in September
North Cucamonga, CA
- Average rainfall days in September: 1.8 days
The month with the highest number of rainy days is March (6.3 days).
The month with the least rainy days is June (0.9 days).
Average snowfall days in September
North Cucamonga, CA
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is February (0.1 days).
The months with the least snowfall days are January, March, April, May, June, July, August, September, October, November and December (0 days).
Average daylight in September /
Average sunshine in September
North Cucamonga, CA
- Average daylight in September: 12h and 2min
The month with the longest days is June (Average daylight: 14h and 24min).
The month with the shortest days is December (Average daylight: 9h and 54min).
- Average sunshine in September: 10h and 4min
The month with the most sunshine is July (Average sunshine: 12h and 6min).
The months with the least sunshine are February and December (Average sunshine: 6h and 54min).
Average sunshine days in September
North Cucamonga, CA
- Average sunshine days in September: 26 days
The month with the most sunshine days is June (28.3 days).
The month with the least sunshine days is February (22.8 days).
Average UV index in September
North Cucamonga, CA
- Average UV index in September: 6
The months with the highest UV index are July and August (UV index 7).
The month with the lowest UV index is December (UV index 3).
Average cloud cover in September
North Cucamonga, CA
- Average cloud cover in September: 6
The months with the most cloud cover are February and December (Cloud cover 21).
The month with the least cloud cover is August (Cloud cover 5).
Average visibility in September
North Cucamonga, CA
- Average visibility in September: 6mi
The months with the highest visibility are January, February, March, April, May, June, July, August, September, October, November and December (6mi).
The months with the lowest visibility are January, February, March, April, May, June, July, August, September, October, November and December (6mi).
North Cucamonga, California, USA
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