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 77.5°F (25.3°C), showing little deviation from August's 78.8°F (26°C). Throughout September, an average nighttime temperature of 61.2°F (16.2°C) is experienced.Humidity
The average relative humidity in September in Los Alamos is 59%.Rainfall
In Los Alamos, in September, during 1.6 rainfall days, 0.08" (2mm) of precipitation is typically accumulated. Throughout the year, in Los Alamos, there are 37.7 rainfall days, and 5.98" (152mm) of precipitation is accumulated.Daylight
In Los Alamos, the average length of the day in September is 12h and 23min.On the first day of the month, sunrise is at 6:34 am and sunset at 7:27 pm. On the last day of September, sunrise is at 6:55 am and sunset at 6:45 pm PDT.
Sunshine
The average sunshine in September is 11.3h.UV index
In Los Alamos, the average daily maximum UV index in September is 5. A UV Index reading of 3 to 5 represents a medium health hazard from exposure to the Sun's UV rays for the average person.Note: A daily high UV index of 5 in September leads to these guidelines:
Heed the precautions - Suggestions to avoid sunburn are made. Solar radiation is at its peak intensity during midday, so it's advisable to stay indoors or in the shade. Limit sun-induced ocular harm with sunglasses that feature UVA and UVB filtration.
Frequently asked questions
What is the usual temperature for Los Alamos in September?
What is the average humidity in September in Los Alamos?
How many days does it rain in September in Los Alamos?
How many hours of daylight does Los Alamos have in September?
What time are sunrise and sunset in September in Los Alamos?
How many hours of sunshine does Los Alamos have in September?
How high is the UV index in September in Los Alamos?
Average temperature in September
Los Alamos, CA
- Average high temperature in September: 77.5°F
The warmest month (with the highest average high temperature) is August (78.8°F).
The month with the lowest average high temperature is December (61.2°F).
- Average low temperature in September: 61.2°F
The month with the highest average low temperature is September (61.2°F).
The coldest month (with the lowest average low temperature) is February (47.8°F).
Average pressure in September
Los Alamos, CA
- Average pressure in September: 29.91"Hg
The month with the highest atmospheric pressure is January (30.11"Hg).
The months with the lowest atmospheric pressure are June, August and September (29.91"Hg).
Average wind speed in September
Los Alamos, CA
- Average wind speed in September: 7.2mph
The windiest month (with the highest average wind speed) is May (8.9mph).
The calmest month (with the lowest average wind speed) is July (6.7mph).
Average humidity in September
Los Alamos, CA
- Average humidity in September: 59%
The month with the highest relative humidity is March (67%).
The months with the lowest relative humidity are October and November (58%).
Average rainfall in September
Los Alamos, CA
- Average rainfall in September: 0.08"
The wettest month (with the highest rainfall) is January (1.38").
The driest month (with the least rainfall) is June (0.04").
Average rainfall days in September
Los Alamos, CA
- Average rainfall days in September: 1.6 days
The month with the highest number of rainy days is March (6.2 days).
The month with the least rainy days is August (0.8 days).
Average daylight in September /
Average sunshine in September
Los Alamos, CA
- Average daylight in September: 12h and 2min
The month with the longest days is June (Average daylight: 14h and 30min).
The month with the shortest days is December (Average daylight: 9h and 54min).
- Average sunshine in September: 11h and 2min
The months with the most sunshine are June and July (Average sunshine: 12h and 0min).
The month with the least sunshine is February (Average sunshine: 6h and 36min).
Average sunshine days in September
Los Alamos, CA
- Average sunshine days in September: 27.9 days
The month with the most sunshine days is August (29 days).
The month with the least sunshine days is February (22.3 days).
Average UV index in September
Los Alamos, CA
- Average UV index in September: 5
The months with the highest UV index are June, July and August (UV index 6).
The month with the lowest UV index is December (UV index 3).
Average cloud cover in September
Los Alamos, CA
- Average cloud cover in September: 6
The month with the most cloud cover is March (Cloud cover 24).
The month with the least cloud cover is August (Cloud cover 5).
Average visibility in September
Los Alamos, 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 Alamos, California, USA
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