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
La Palma marks the onset of September with an average high-temperature of a still warm 81.3°F (27.4°C), subtly divergent from August's 82°F (27.8°C). In La Palma, the September nights cool down to an average low of 64.8°F (18.2°C).Heat index
For most parts of September, the heat index is calculated to be 84.2°F (29°C). Prolonged exposure combined with continuous activity could lead to exhaustion, and possibly heat cramps.Metrics for the heat index primarily focus on shaded spots and light wind conditions. Direct sunlight can potentially boost the heat index by 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'feels like' or 'apparent temperature', blends air temperature and moisture content to represent the felt temperature to humans. An individual's temperature experience can be influenced by extra factors, including metabolic differences, activity levels, and clothing. Considering the impact of direct sunlight, it's possible for the heat index to surge by up to 15 Fahrenheit (8 Celsius) degrees. Heat index values are highly critical to babies and toddlers. Young individuals usually face greater risks than adults as their sweat production is less. Also, their larger skin surface relative to their small bodies and the high heat generation due to their activity contributes to their vulnerability.
Humidity
In La Palma, the average relative humidity in September is 60%.Rainfall
In La Palma, in September, during 1.4 rainfall days, 0.04" (1mm) of precipitation is typically accumulated. Throughout the year, in La Palma, there are 33.3 rainfall days, and 2.32" (59mm) of precipitation is accumulated.Daylight
In September, the average length of the day is 12h and 22min.On the first day of the month, sunrise is at 6:26 am and sunset at 7:17 pm. On the last day of September, sunrise is at 6:46 am and sunset at 6:37 pm PDT.
Sunshine
The average sunshine in September in La Palma is 10.6h.UV index
The months with the highest UV index in La Palma are June through September, with an average maximum UV index of 6. A UV Index estimate of 6 to 7 represents a high health vulnerability from exposure to the Sun's UV rays for average individuals.Note: The UV index of 6 during September leads to these advisories:
Take precautions and adopt sun safety practices. Protection against sunburn is obliged. The Sun's UV radiation is most intense from 10 a.m. to 4 p.m. Try to avoid direct sun exposure during these hours. Arm yourself against UV rays' harm with protective apparel and UV-filtering shades.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What are September temperatures in La Palma?
What is the average humidity in September in La Palma?
How much does it rain in La Palma in September?
What is the average length of the day in September in La Palma?
When is the sunrise / sunset in September in La Palma?
How many hours of sunshine does La Palma have in September?
What is the month with the highest UV index in La Palma?
What is the UV index intensity in September in La Palma?
Average temperature in September
La Palma, CA
- Average high temperature in September: 81.3°F
The warmest month (with the highest average high temperature) is August (82°F).
The month with the lowest average high temperature is December (64°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 (51.3°F).
Average pressure in September
La Palma, CA
- Average pressure in September: 29.89"Hg
The month with the highest atmospheric pressure is January (30.1"Hg).
The months with the lowest atmospheric pressure are June and September (29.89"Hg).
Average wind speed in September
La Palma, CA
- Average wind speed in September: 4.8mph
The windiest month (with the highest average wind speed) is April (6.2mph).
The calmest months (with the lowest average wind speed) are September and October (4.8mph).
Average humidity in September
La Palma, CA
- Average humidity in September: 60%
The month with the highest relative humidity is June (67%).
The month with the lowest relative humidity is November (52%).
Average rainfall in September
La Palma, CA
- Average rainfall in September: 0.04"
The wettest month (with the highest rainfall) is December (0.55").
The driest month (with the least rainfall) is June (0").
Average rainfall days in September
La Palma, CA
- Average rainfall days in September: 1.4 days
The month with the highest number of rainy days is March (5.6 days).
The month with the least rainy days is June (0.6 days).
Average daylight in September /
Average sunshine in September
La Palma, 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 0min).
The month with the least sunshine is December (Average sunshine: 6h and 42min).
Average sunshine days in September
La Palma, CA
- Average sunshine days in September: 26.6 days
The month with the most sunshine days is June (28.6 days).
The month with the least sunshine days is February (22.9 days).
Average UV index in September
La Palma, 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 February, November and December (UV index 4).
Average cloud cover in September
La Palma, 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 6).
Average visibility in September
La Palma, 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).
La Palma, California, USA
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