The best times to visit Los Alamos for ideal weather are
May 21st to September 30th
based on average temperature and humidity from NOAA (the National Oceanic and Atmospheric Administration). Read below for more weather and travel details.
Los Alamos Travel Guide
Other Los Alamos Travel Info
Weather in Los Alamos
Temperature
Average temperatures in Los Alamos vary drastically. Considering humidity, temperatures feel cold for about half of the year and otherwise nice with a very low chance of rain or snow throughout the year. The area is somewhat temperate — in the 57th percentile for pleasant weather — compared to tourist destinations worldwide. Weeks with ideal weather are listed above. If you’re looking for the very warmest time to visit Los Alamos, the hottest months are June, July, and then August. See average monthly temperatures below. The warmest time of year is generally late June where highs are regularly around 85.7°F (29.8°C) with temperatures rarely dropping below 62.6°F (17°C) at night.
Los Alamos Temperatures (Fahrenheit)
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Los Alamos Temperatures (Celsius)
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“Feels-Like” Temperatures
The way we experience weather isn’t all about temperature. Higher temperatures affect us much more at higher humidity, and colder temperatures feel piercing with high winds. Our perceived temperatures factor in humidity and wind chill to better represent how hot or cold the day feels to a person.
Los Alamos Perceived Temperature (F)
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Los Alamos Perceived Temperature (C)
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Average Los Alamos Temperatures by Month
Daily highs (averaged for the month) usually give the best indication of the weather. A significantly lower mean and low generally just means it gets colder at night.
Show Fahrenheit
| Month | Avg. High (°F) | Avg. Mean (°F) | Avg. Low (°F) |
|---|---|---|---|
| Jan | 41.2 | 32.1 | 24.1 |
| Feb | 46.4 | 36.5 | 28.5 |
| Mar | 56.9 | 45.3 | 35.9 |
| Apr | 63.3 | 51 | 40.7 |
| May | 70.9 | 58.6 | 48.2 |
| Jun | 82.9 | 70.9 | 59.7 |
| Jul | 82.6 | 70.6 | 61.1 |
| Aug | 81.1 | 69.8 | 60.5 |
| Sep | 75.3 | 64 | 54.8 |
| Oct | 64.2 | 53.3 | 44 |
| Nov | 52 | 42.1 | 33.3 |
| Dec | 40.5 | 32.4 | 25.1 |
Show Celsius
| Month | Avg. High (°C) | Avg. Mean (°C) | Avg. Low (°C) |
|---|---|---|---|
| Jan | 5.1 | 0.1 | -4.4 |
| Feb | 8 | 2.5 | -1.9 |
| Mar | 13.8 | 7.4 | 2.2 |
| Apr | 17.4 | 10.6 | 4.8 |
| May | 21.6 | 14.8 | 9 |
| Jun | 28.3 | 21.6 | 15.4 |
| Jul | 28.1 | 21.4 | 16.2 |
| Aug | 27.3 | 21 | 15.8 |
| Sep | 24.1 | 17.8 | 12.7 |
| Oct | 17.9 | 11.8 | 6.7 |
| Nov | 11.1 | 5.6 | 0.7 |
| Dec | 4.7 | 0.2 | -3.8 |
Precipitation (Rain or Snow)
If dry weather is what you’re after, the months with the lowest chance of significant precipitation in Los Alamos are February, January, and then March. Note that we define “significant precipitation” as .1 inches or more in this section. The lowest chance of rain or snow occurs around early January. For example, on the week of January 1st there are no days of precipitation on average. By contrast, it’s most likely to rain or snow in early August with an average of 2 days of significant precipitation the week of July 30th.
When can you find snow in Los Alamos? Weather stations report no annual snow. Please note that a value of 0 for snow in the graph below may either mean there was no snow, or that snow is unreported.
Chance of Precipitation
The graph below shows the % chance of rainy and snowy days in Los Alamos.
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Snow on the Ground
The graph below shows the average snow on the ground in Los Alamos (in).
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Average Rain and Snow by Month
Show Inches
| Month | Daily Chance of Rain | Average Snow Depth (in) | Total Precipitation (in) |
|---|---|---|---|
| Jan | 1% | 0 | 0.1 |
| Feb | 0% | 0 | 0 |
| Mar | 1% | 0 | 0.2 |
| Apr | 1% | 0 | 0.1 |
| May | 4% | 0 | 0.5 |
| Jun | 3% | 0 | 0.2 |
| Jul | 13% | 0 | 1.5 |
| Aug | 8% | 0 | 1 |
| Sep | 8% | 0 | 1.3 |
| Oct | 4% | 0 | 0.6 |
| Nov | 3% | 0 | 0.2 |
| Dec | 2% | 0 | 0.2 |
Show Centimeters
| Month | Daily Chance of Rain | Average Snow Depth (cm) | Total Precipitation (cm) |
|---|---|---|---|
| Jan | 1 | 0 | 0.3 |
| Feb | 0 | 0 | 0 |
| Mar | 1 | 0 | 0.5 |
| Apr | 1 | 0 | 0.3 |
| May | 4 | 0 | 1.3 |
| Jun | 3 | 0 | 0.5 |
| Jul | 13 | 0 | 3.8 |
| Aug | 8 | 0 | 2.5 |
| Sep | 8 | 0 | 3.3 |
| Oct | 4 | 0 | 1.5 |
| Nov | 3 | 0 | 0.5 |
| Dec | 2 | 0 | 0.5 |
Humidity and Wind
Los Alamos has some comfortably humid months, with some very dry months. The least humid month is June (17.8% relative humidity), and the most humid month is December (48.5%).
Wind in Los Alamos is usually calm. The windiest month is April, followed by May and June. April’s average wind speed of around 7.2 knots (8.2 MPH or 13.3 KPH) is considered “a gentle breeze.” Maximum sustained winds (the highest speed for the day lasting more than a few moments) are at their highest in late April where average top sustained speeds reach 20.1 knots, which is considered a fresh breeze.
Relative Humidity (%)
The graph below shows the average % humidity by month in Los Alamos.
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Wind
The graph below shows wind speed (max and average) in knots.
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Average Wind Speeds
Show Wind Speeds
All wind speeds are in knots. 1 knot = 1.15 MPH or 1.85 KPH.
| Month | Avg. Wind | Avg. Wind Feel | Sustained High Wind | High Wind Feel |
| Jan | 3.6 | Barely noticeable | 11.9 | Significant breeze |
| Feb | 4.8 | Light breeze | 14.5 | Significant breeze |
| Mar | 6 | Light breeze | 16.5 | Significant breeze |
| Apr | 7.2 | Gentle breeze | 19.2 | Strong breeze |
| May | 7 | Gentle breeze | 18 | Significant breeze |
| Jun | 6.9 | Light breeze | 18.1 | Strong breeze |
| Jul | 5.3 | Light breeze | 15.7 | Significant breeze |
| Aug | 5.3 | Light breeze | 15.1 | Significant breeze |
| Sep | 5.3 | Light breeze | 14.4 | Significant breeze |
| Oct | 4.8 | Light breeze | 13.9 | Significant breeze |
| Nov | 4.1 | Light breeze | 12.4 | Significant breeze |
| Dec | 4 | Light breeze | 12.3 | Significant breeze |
Show Relative Humidity by Month
| Month | Avg. Relative Humidity |
|---|---|
| Jan | 41% |
| Feb | 38.4% |
| Mar | 25.3% |
| Apr | 22.3% |
| May | 25.4% |
| Jun | 17.8% |
| Jul | 37.3% |
| Aug | 37.1% |
| Sep | 37.2% |
| Oct | 33% |
| Nov | 33.9% |
| Dec | 48.5% |
Is it Safe to Travel to Los Alamos?
Our best data indicates this area is generally safe. As of Dec 04, 2023 there are no travel advisories or warnings for the United States; exercise normal security precautions. Check this page for any recent changes or regions to avoid: Travel Advice and Advisories. This advisory was last updated on Dec 04, 2023.
The Busiest and Least Crowded Months
The busiest month for tourism in Los Alamos, NM, US is July, followed by March and June. Prices for hotels and flights will be most expensive during these months, though you can save if you purchase well in advance. Tourists are unlikely to visit Los Alamos in November. Those willing to visit at these times will likely find it the least expensive month.
Estimated Tourism by Month
Most Popular Months to Visit
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Overall Los Alamos Travel Experience by Season
Spring (March through May)
Humidity and temperatures combine to make this season feel moderately cold. Highs range from 78.6°F (25.9°C) and 50°F (10°C) with warmer temperatures in the later months. Rain is extremely rare with 0 to 1 days of significant precipitation per month. Spring is the busiest for tourism, which makes it a good time for those looking for things to do.
Summer (June through August)
The middle-year months have very comfortable weather with high temperatures that are comfortable. These months see the most precipitation with 1 to 4 days of precipitation per month. June – August is the second busiest season for tourism in Los Alamos, so lodging and other accommodations may cost slightly more.
Fall (September through November)
Fall daily highs range from 77.9°F (25.5°C) and 47.6°F (8.7°C), which will feel chilly given the humidity and wind. It rains or snows a normal amount: 1 to 2 days per month. Tourism is the slowest during these months due to the weather, so hotels may be affordably priced.
Winter (December through February)
Weather is far too cold this time of year in Los Alamos to be enjoyable for warm weather travelers. The average high during this season is between 50°F (10°C) and 36.2°F (2.3°C). On average, it rains or snows a very small amount: 0 to 1 times per month. These times of year are fairly slow with tourists.
Best Times to Travel› the United States › Los Alamos, NM, US