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 arrival shows an average high-temperature of a still moderately hot 79.7°F (26.5°C), hardly different from the previous month. Rancho Santa Margarita observes an average nighttime low-temperature of 63.5°F (17.5°C) during the month of September.Humidity
The average relative humidity in September in Rancho Santa Margarita is 63%.Rainfall
In Rancho Santa Margarita, in September, during 4.5 rainfall days, 0.24" (6mm) of precipitation is typically accumulated. In Rancho Santa Margarita, California, during the entire year, the rain falls for 64.2 days and collects up to 5.79" (147mm) of precipitation.Daylight
In September, the average length of the day in Rancho Santa Margarita, California, 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
The average sunshine in September is 10.5h.UV index
June through September, with an average maximum UV index of 6, are months with the highest UV index in Rancho Santa Margarita, California. A UV Index of 6 to 7 symbolizes a high health vulnerability from unprotected exposure to Sun's UV rays for average individuals.Note: The UV index of 6 during September leads to these advisories:
Stand by precautions and apply sun safety measures. Evading sunburn is of great importance. Stay in the shade and limit sun exposure from 10 a.m. to 4 p.m., when UV radiation is most potent. Keep in mind that shade structures like parasols or canopies do not offer full protection. Select sunglasses that boast both UVA and UVB protection to limit the adverse effects of the sun on the eyes.
Frequently asked questions
What is the temperature in September in Rancho Santa Margarita?
What is the average humidity in September in Rancho Santa Margarita?
How many days does it rain in September in Rancho Santa Margarita?
How many hours of daylight does Rancho Santa Margarita have in September?
When are sunrise and sunset in September in Rancho Santa Margarita?
How many hours of sunshine does Rancho Santa Margarita have in September?
What are the months with the highest UV index in Rancho Santa Margarita?
What is the UV index intensity in September in Rancho Santa Margarita?
Average temperature in September
Rancho Santa Margarita, CA
- Average high temperature in September: 79.7°F
The warmest month (with the highest average high temperature) is August (81.1°F).
The month with the lowest average high temperature is December (63°F).
- Average low temperature in September: 63.5°F
The month with the highest average low temperature is August (64.2°F).
The coldest month (with the lowest average low temperature) is February (48.9°F).
Average pressure in September
Rancho Santa Margarita, CA
- Average pressure in September: 29.88"Hg
The month with the highest atmospheric pressure is January (30.1"Hg).
The months with the lowest atmospheric pressure are June and September (29.88"Hg).
Average wind speed in September
Rancho Santa Margarita, CA
- Average wind speed in September: 4.6mph
The windiest month (with the highest average wind speed) is April (5.8mph).
The calmest month (with the lowest average wind speed) is August (4.5mph).
Average humidity in September
Rancho Santa Margarita, CA
- Average humidity in September: 63%
The months with the highest relative humidity are May and June (70%).
The month with the lowest relative humidity is November (56%).
Average rainfall in September
Rancho Santa Margarita, CA
- Average rainfall in September: 0.24"
The wettest month (with the highest rainfall) is December (1.02").
The driest month (with the least rainfall) is June (0.08").
Average rainfall days in September
Rancho Santa Margarita, CA
- Average rainfall days in September: 4.5 days
The month with the highest number of rainy days is March (8.6 days).
The month with the least rainy days is June (1.9 days).
Average daylight in September /
Average sunshine in September
Rancho Santa Margarita, 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: 10h and 0min).
- Average sunshine in September: 10h and 3min
The month with the most sunshine is August (Average sunshine: 12h and 0min).
The month with the least sunshine is December (Average sunshine: 6h and 36min).
Average sunshine days in September
Rancho Santa Margarita, CA
- Average sunshine days in September: 22.2 days
The month with the most sunshine days is January (24.3 days).
The month with the least sunshine days is February (19.8 days).
Average UV index in September
Rancho Santa Margarita, 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, March, November and December (UV index 4).
Average cloud cover in September
Rancho Santa Margarita, CA
- Average cloud cover in September: 11
The months with the most cloud cover are March and December (Cloud cover 25).
The month with the least cloud cover is August (Cloud cover 7).
Average visibility in September
Rancho Santa Margarita, 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).
Rancho Santa Margarita, California, USA
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