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
The transition from August to September sees an average high-temperature of a still warm 78.4°F (25.8°C), indicating a minor variance from the prior month. An average low-temperature of 65.1°F (18.4°C) is observed during September nights.Humidity
In Los Alamitos, California, the average relative humidity in September is 64%.Rainfall
In Los Alamitos, during September, the rain falls for 1.6 days and regularly aggregates up to 0.04" (1mm) of precipitation. Throughout the year, in Los Alamitos, there are 27 rainfall days, and 1.65" (42mm) of precipitation is accumulated.Daylight
In September, the average length of the day in Los Alamitos 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
In Los Alamitos, the average sunshine in September is 10.6h.UV index
July through September, with an average maximum UV index of 6, are months with the highest UV index. A UV Index of 6 to 7 symbolizes a high health hazard from unsafe exposure to UV radiation for average individuals.Note: In September, the average maximum UV index of 6 translates into the following recommendations:
Act on precautions and pay attention to sun safety recommendations. Avoidance of sunburn is obligatory. The Sun emits the most powerful UV radiation between 10 a.m. and 4 p.m. Try to avoid direct sunlight during this period. A wide-brimmed hat is a shield, deflecting up to 50% of harmful UV radiation from eyes.
Frequently asked questions
What is the temperature in September in Los Alamitos?
What is the average humidity in September in Los Alamitos?
How many days does it rain in September in Los Alamitos?
How many hours of daylight does Los Alamitos have in September?
When is the sunrise / sunset in September in Los Alamitos?
How long on average sun shines in September in Los Alamitos?
What is the month with the highest UV index in Los Alamitos?
What is the UV index reading in September in Los Alamitos?
Average temperature in September
Los Alamitos, CA
- Average high temperature in September: 78.4°F
The warmest month (with the highest average high temperature) is August (79°F).
The month with the lowest average high temperature is December (63.5°F).
- Average low temperature in September: 65.1°F
The months with the highest average low temperature are August and September (65.1°F).
The coldest month (with the lowest average low temperature) is February (52°F).
Average pressure in September
Los Alamitos, 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
Los Alamitos, CA
- Average wind speed in September: 5.1mph
The windiest month (with the highest average wind speed) is April (6.5mph).
The calmest months (with the lowest average wind speed) are September and October (5.1mph).
Average humidity in September
Los Alamitos, CA
- Average humidity in September: 64%
The month with the highest relative humidity is June (71%).
The month with the lowest relative humidity is November (56%).
Average rainfall in September
Los Alamitos, CA
- Average rainfall in September: 0.04"
The wettest months (with the highest rainfall) are February and December (0.31").
The driest month (with the least rainfall) is June (0").
Average rainfall days in September
Los Alamitos, CA
- Average rainfall days in September: 1.6 days
The month with the highest number of rainy days is March (4.9 days).
The month with the least rainy days is June (0.7 days).
Average daylight in September /
Average sunshine in September
Los Alamitos, 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 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
Los Alamitos, CA
- Average sunshine days in September: 26.8 days
The month with the most sunshine days is June (28.8 days).
The month with the least sunshine days is February (24.2 days).
Average UV index in September
Los Alamitos, CA
- Average UV index in September: 6
The months with the highest UV index are 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
Los Alamitos, CA
- Average cloud cover in September: 9
The month with the most cloud cover is December (Cloud cover 23).
The month with the least cloud cover is August (Cloud cover 6).
Average visibility in September
Los Alamitos, 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).
Los Alamitos, California, USA
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