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 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 brings an average high-temperature of a still hot 86.9°F (30.5°C), nearly identical to the preceding month. Norco, in September, displays a significant temperature downturn during the night, with an average reading of 63.5°F (17.5°C).Heat index
During September, the heat index is appraised at a tropical 89.6°F (32°C). If one persists in activity during exposure, it could induce weariness and subsequently, heat cramps.Take into consideration that the heat index values are calculated for shade and light wind conditions. Exposure to direct sunlight may make the heat index values climb by 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'feels like' or 'real feel', reflects the blend of air temperature and relative humidity to give a temperature impression. Factors including metabolic differences, physical activity, and clothing are additional elements that influence the individual's temperature experience. When exposed to direct sunlight, it's possible for the heat index to increase by as much as 15 Fahrenheit (8 Celsius) degrees. Heat index values hold particular importance for children. Children often fail to understand the importance of rest and rehydration. Thirst is a late manifestation of dehydration - hence, it is crucial to stay hydrated, especially during ongoing physical activities.
Humidity
In September, the average relative humidity is 49%.Rainfall
In September, the rain falls for 2.5 days. Throughout September, 0.12" (3mm) of precipitation is accumulated. In Norco, during the entire year, the rain falls for 53.9 days and collects up to 8.86" (225mm) of precipitation.Daylight
In Norco, California, the average length of the day in September is 12h and 22min.On the first day of the month, sunrise is at 6:24 am and sunset at 7:15 pm. On the last day of September, sunrise is at 6:44 am and sunset at 6:35 pm PDT.
Sunshine
The average sunshine in September is 10.6h.UV index
In Norco, the average daily maximum UV index in September is 6. A UV Index of 6 to 7 symbolizes a high health risk from exposure to the Sun's UV rays for ordinary individuals.Note: The maximum daily UV index, 6 in September, converts into the following recommendations:
Prevent overexposure. Protection from the sun's harmful effects is needed. Avoid direct Sun exposure and stay in the shade between 10 a.m. and 4 p.m., a time when UV radiation is most intense, noting that not all shade structures offer full protection. Fend off the sun's harsh rays with appropriate clothing, a wide-brim hat, and UV-protective sunglasses.
Frequently asked questions
How hot does it get in Norco in September?
What is the average humidity in September in Norco?
How many days does it rain in September in Norco?
How many hours of daylight does Norco have in September?
What time are sunrise and sunset in September in Norco?
How long on average sun shines in September in Norco?
How high is the UV index in September in Norco?
Average temperature in September
Norco, CA
- Average high temperature in September: 86.9°F
The warmest month (with the highest average high temperature) is August (89.4°F).
The month with the lowest average high temperature is December (63.5°F).
- Average low temperature in September: 63.5°F
The month with the highest average low temperature is August (65.8°F).
The coldest month (with the lowest average low temperature) is December (46.9°F).
Average pressure in September
Norco, 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 (29.87"Hg).
Average wind speed in September
Norco, CA
- Average wind speed in September: 4.3mph
The windiest months (with the highest average wind speed) are April and May (5.4mph).
The calmest month (with the lowest average wind speed) is September (4.3mph).
Average humidity in September
Norco, CA
- Average humidity in September: 49%
The month with the highest relative humidity is May (60%).
The month with the lowest relative humidity is November (48%).
Average rainfall in September
Norco, CA
- Average rainfall in September: 0.12"
The wettest month (with the highest rainfall) is December (1.89").
The driest month (with the least rainfall) is June (0.04").
Average rainfall days in September
Norco, CA
- Average rainfall days in September: 2.5 days
The month with the highest number of rainy days is March (8.2 days).
The month with the least rainy days is June (1.3 days).
Average daylight in September /
Average sunshine in September
Norco, 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 months with the most sunshine are July and August (Average sunshine: 12h and 6min).
The month with the least sunshine is December (Average sunshine: 6h and 42min).
Average sunshine days in September
Norco, CA
- Average sunshine days in September: 24.5 days
The month with the most sunshine days is June (27.1 days).
The month with the least sunshine days is February (20.8 days).
Average UV index in September
Norco, CA
- Average UV index in September: 6
The months with the highest UV index are July and August (UV index 7).
The months with the lowest UV index are January, February, November and December (UV index 4).
Average cloud cover in September
Norco, CA
- Average cloud cover in September: 8
The months with the most cloud cover are March and December (Cloud cover 23).
The month with the least cloud cover is August (Cloud cover 5).
Average visibility in September
Norco, 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).
Norco, California, USA
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