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's average high-temperature stands at a still warm 84°F (28.9°C), showing little deviation from August's 85.3°F (29.6°C). Placentia, in September, experiences an average temperature of 64.8°F (18.2°C) at night.Heat index
In September, the heat index is computed to be a tropical 86°F (30°C). If one stays active during extended exposure, it might induce fatigue and result in heat cramps.In reference to the heat index, it's for places in shade and with a slight wind. Being exposed to direct sunshine might trigger a heat index increase by 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'real feel' or 'felt air temperature', combines air temperature and relative humidity to represent a human perceived temperature equivalent. One's perception of temperature is subjective, varying based on their activity and individual heat perception, influenced by factors like wind, clothing, and metabolic variations. Remember, direct sunlight exposure can heighten the heat impact and might increase the heat index by 15 Fahrenheit (8 Celsius) degrees. Heat index values are extremely significant for babies and toddlers. Kids often lack the knowledge about the necessity to take breaks and consume liquids. Thirst, as a late symptom of dehydration, necessitates the maintenance of hydration, particularly during enduring physical activities.
Humidity
In Placentia, the average relative humidity in September is 56%.Rainfall
In Placentia, during September, the rain falls for 3 days and regularly aggregates up to 0.16" (4mm) of precipitation. In Placentia, during the entire year, the rain falls for 53.2 days and collects up to 7.72" (196mm) of precipitation.Daylight
In Placentia, the average length of the day in September is 12h and 22min.On the first day of September in Placentia, California, sunrise is at 6:25 am and sunset at 7:16 pm. On the last day of the month, sunrise is at 6:45 am and sunset at 6:36 pm PDT.
Sunshine
In Placentia, the average sunshine in September is 10.7h.UV index
June through September, with an average maximum UV index of 6, are months with the highest UV index in Placentia, California. A UV Index estimate of 6 to 7 represents a high health risk from unsafe exposure to UV radiation for the ordinary person.Note: The daily high UV index of 6 in September translates into this advice:
Adhere to precautions and respect sun safety doctrines. Avoiding sunburn is vital. UV radiation from the sun is at its strongest between 10 a.m. and 4 p.m. Try to limit direct exposure during these hours. Consider a wide-brim hat essential for effective sun defense covering your face, neck, and eyes.
Frequently asked questions
How hot is September in Placentia?
What is the average humidity in September in Placentia?
How much does it rain in Placentia in September?
What is the average length of the day in September in Placentia?
What time are sunrise and sunset in September in Placentia?
How long on average sun shines in September in Placentia?
What is the month with the highest UV index in Placentia?
What is the UV index intensity in September in Placentia?
Average temperature in September
Placentia, CA
- Average high temperature in September: 84°F
The warmest month (with the highest average high temperature) is August (85.3°F).
The month with the lowest average high temperature is December (64.2°F).
- Average low temperature in September: 64.8°F
The month with the highest average low temperature is August (65.7°F).
The coldest month (with the lowest average low temperature) is February (49.6°F).
Average pressure in September
Placentia, CA
- Average pressure in September: 29.89"Hg
The month with the highest atmospheric pressure is January (30.1"Hg).
The month with the lowest atmospheric pressure is June (29.88"Hg).
Average wind speed in September
Placentia, CA
- Average wind speed in September: 4.5mph
The windiest month (with the highest average wind speed) is April (5.8mph).
The calmest month (with the lowest average wind speed) is September (4.5mph).
Average humidity in September
Placentia, CA
- Average humidity in September: 56%
The month with the highest relative humidity is June (63%).
The month with the lowest relative humidity is November (50%).
Average rainfall in September
Placentia, CA
- Average rainfall in September: 0.16"
The wettest month (with the highest rainfall) is December (1.65").
The driest month (with the least rainfall) is June (0.04").
Average rainfall days in September
Placentia, CA
- Average rainfall days in September: 3 days
The month with the highest number of rainy days is March (7.4 days).
The month with the least rainy days is June (1.4 days).
Average daylight in September /
Average sunshine in September
Placentia, 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 48min).
Average sunshine days in September
Placentia, CA
- Average sunshine days in September: 24.4 days
The month with the most sunshine days is August (26.7 days).
The month with the least sunshine days is February (20.7 days).
Average UV index in September
Placentia, CA
- Average UV index in September: 6
The months with the highest UV index are June, July, August and September (UV index 6).
The months with the lowest UV index are January, February, November and December (UV index 4).
Average cloud cover in September
Placentia, CA
- Average cloud cover in September: 8
The months with the most cloud cover are March and December (Cloud cover 22).
The month with the least cloud cover is August (Cloud cover 5).
Average visibility in September
Placentia, 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).
Placentia, California, USA
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