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 snowfall in September
- Average snowfall 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 onset of September entails a subtle temperature shift, as the average high-temperature eases from 79.7°F (26.5°C) in August to a still warm 73.9°F (23.3°C). A striking departure from daytime highs to an average low-temperature of 51.6°F (10.9°C) is witnessed during September.Humidity
The average relative humidity in September in Los Alamos is 49%.Rainfall
In September, in Los Alamos, the rain falls for 11.7 days. Throughout September, 1.22" (31mm) of precipitation is accumulated. Throughout the year, there are 106.2 rainfall days, and 12.05" (306mm) of precipitation is accumulated.Snowfall
In Los Alamos, New Mexico, snow does not fall in June through September.Daylight
In Los Alamos, the average length of the day in September is 12h and 23min.On the first day of September, sunrise is at 6:37 am and sunset at 7:32 pm. On the last day of the month, sunrise is at 7:00 am and sunset at 6:49 pm MDT.
Sunshine
The average sunshine in September is 11.4h.UV index
In September, the average daily maximum UV index is 4. A UV Index reading of 3 to 5 represents a medium health hazard from exposure to the Sun's UV rays for ordinary individuals.Note: A maximum UV index of 4 in September translates into the following recommendations:
Take precautions - Protection against sunburn is recommended. The midday Sun can be dangerous due to its intense radiation; always find shade and reduce exposure. Wearing sunglasses with both UVA and UVB protection effectively reduces sun-induced eye damage.
Frequently asked questions
What are September temperatures in Los Alamos?
What is the average humidity in September in Los Alamos?
How much does it rain in Los Alamos in September?
When it does not snow in Los Alamos?
Does it snow in Los Alamos in September?
How many hours of daylight does Los Alamos have in September?
When 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, NM
- Average high temperature in September: 73.9°F
The warmest month (with the highest average high temperature) is July (81.3°F).
The month with the lowest average high temperature is January (37.9°F).
- Average low temperature in September: 51.6°F
The month with the highest average low temperature is July (59.2°F).
The coldest months (with the lowest average low temperature) are January and December (21.6°F).
Average pressure in September
Los Alamos, NM
- Average pressure in September: 30.02"Hg
The month with the highest atmospheric pressure is January (30.16"Hg).
The month with the lowest atmospheric pressure is April (29.89"Hg).
Average wind speed in September
Los Alamos, NM
- Average wind speed in September: 5.6mph
The windiest month (with the highest average wind speed) is April (8.1mph).
The calmest month (with the lowest average wind speed) is August (5.1mph).
Average humidity in September
Los Alamos, NM
- Average humidity in September: 49%
The month with the highest relative humidity is January (70%).
The month with the lowest relative humidity is June (33%).
Average rainfall in September
Los Alamos, NM
- Average rainfall in September: 1.22"
The wettest month (with the highest rainfall) is July (2.56").
The driest month (with the least rainfall) is April (0.39").
Average rainfall days in September
Los Alamos, NM
- Average rainfall days in September: 11.7 days
The month with the highest number of rainy days is July (18.2 days).
The month with the least rainy days is November (5.1 days).
Average snowfall in September
Los Alamos, NM
- Average snowfall in September: 0"
The month with the highest snowfall is January (5.24").
The months with the least snowfall are June, July, August and September (0").
Average snowfall days in September
Los Alamos, NM
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is December (8.1 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight in September /
Average sunshine in September
Los Alamos, NM
- Average daylight in September: 12h and 2min
The month with the longest days is June (Average daylight: 14h and 36min).
The month with the shortest days is December (Average daylight: 9h and 48min).
- Average sunshine in September: 11h and 2min
The month with the most sunshine is June (Average sunshine: 12h and 6min).
The months with the least sunshine are January, February and December (Average sunshine: 7h and 6min).
Average sunshine days in September
Los Alamos, NM
- Average sunshine days in September: 13.9 days
The month with the most sunshine days is November (22.8 days).
The month with the least sunshine days is July (8.9 days).
Average UV index in September
Los Alamos, NM
- Average UV index in September: 4
The month with the highest UV index is June (UV index 6).
The months with the lowest UV index are January, February, November and December (UV index 2).
Average cloud cover in September
Los Alamos, NM
- Average cloud cover in September: 12
The month with the most cloud cover is January (Cloud cover 22).
The month with the least cloud cover is June (Cloud cover 10).
Average visibility in September
Los Alamos, NM
- 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, New Mexico, USA
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