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Weather & Climate in Los Alamos, NM
Temperature, precipitation, air quality, natural hazards, and monthly weather data.
Los Alamos experiences four distinct seasons with an average annual temperature of 50°F (10°C). Winters average 30°F in January while summers reach 70°F in July. The area gets 330 sunny days per year, well above the U.S. average of 205 / making it one of the sunnier locations in the country. Annual precipitation totals 17.5 inches (drier than the 38-inch national average). The area receives 42.1 inches of snow annually, making winter weather a significant factor for residents. Air quality is rated Good with a median AQI of 14 / among the cleanest air in the country. 100% of days have good air quality. The city sits at an elevation of 7,322 feet.
Temperature
30°F Jan (-1°C)
70°F Jul (21°C)
| Annual Average | 49.8°F |
| 8% below US avg | |
| January Average | 30°F (-1°C) |
| July Average | 70°F (21°C) |
| Sunny Days | 330 days/yr |
Geography
| Elevation | 7,322 ft (2,232 m) |
| Area | 11.1 sq mi (28.8 km²) |
| Population Density | 1,213/sq mi |
| Coordinates | 35.8940°N, 106.2900°W |
| Timezone | America/Denver |
| County | Los Alamos County County |
| Nearest Airport | Santa Fe Regional (SAF) 23 miles away |
Precipitation & Snow
Air Quality
| AQI Median | 14.0 |
| Rating | Good |
| Good Days % | 100.0% |
| Unhealthy Days | 0 |
Natural Hazard Risk
| Overall Risk | Very Low |
| Risk Score | 3.6 / 100 |
| Social Vulnerability | 10.6 / 100 |
| Community Resilience | 99.7 / 100 |
Hazard Breakdown
| Tornado | Very Low |
| Earthquake | Very Low |
| Wildfire | Relatively Low |
| Flood | Very Low |
| Hail | Very Low |
| Strong Wind | Very Low |
| Heat Wave | Very Low |
| Winter Weather | Relatively Low |
| Lightning | Relatively Low |
| Ice Storm | Very Low |
| Drought | No Rating |
| Cold Wave | Very Low |
| Landslide | Relatively Low |
| Volcano | No Rating |
| Avalanche | Very Low |
Source: FEMA National Risk Index v1.20 (Dec 2025)
Earthquake History
49 earthquakes (M2.5+) recorded within 150 km since 1990. Strongest on record: M4.2.
| Jul 12, 2021 | 5 km E of Capulin, New Mexico | M4.2 | 55 km | 13 km |
| May 18, 2023 | 8 km ENE of San Mateo, New Mexico | M3.8 | 129 km | 5 km |
| Jul 4, 1995 | 23 km WSW of Springer, New Mexico | M3.8 | 138 km | 5 km |
| Jun 4, 2008 | 8 km ENE of Canjilon, New Mexico | M3.7 | 69 km | 5 km |
| Jul 12, 2021 | 3 km E of Capulin, New Mexico | M3.7 | 57 km | 10 km |
| Jul 22, 1990 | 5 km SE of McIntosh, New Mexico | M3.7 | 120 km | 10 km |
| Jan 4, 1998 | 5 km NE of Mountainair, New Mexico | M3.6 | 149 km | 5 km |
| Dec 31, 1997 | 8 km ENE of Mountainair, New Mexico | M3.5 | 150 km | 5 km |
| Oct 20, 2016 | 3 km NNW of Seboyeta, New Mexico | M3.5 | 125 km | 5 km |
| Sep 29, 2012 | 4 km WNW of Belen, New Mexico | M3.5 | 143 km | 5 km |
| Sep 10, 2024 | 7 km WNW of Paradise Hills, New Mexico | M3.5 | 87 km | 6 km |
| Sep 14, 2009 | 7 km NNW of Canjilon, New Mexico | M3.5 | 74 km | 5 km |
| Oct 17, 2011 | 3 km SE of Cuyamungue, New Mexico | M3.5 | 29 km | 5 km |
| Dec 31, 1997 | 8 km ENE of Mountainair, New Mexico | M3.4 | 150 km | 5 km |
| Apr 9, 2021 | 2 km NNE of Capulin, New Mexico | M3.3 | 61 km | 5 km |
| Sep 10, 2024 | 8 km WSW of Paradise Hills, New Mexico | M3.2 | 92 km | 5 km |
| Sep 29, 2017 | 17 km S of Mora, New Mexico | M3.1 | 87 km | 5 km |
| Aug 15, 2007 | 5 km W of La Cienega, New Mexico | M3.0 | 38 km | 5 km |
| Jun 26, 2018 | 3 km ESE of Regina, New Mexico | M3.0 | 65 km | 3 km |
| Jul 12, 2021 | 4 km NNE of Capulin, New Mexico | M3.0 | 61 km | 10 km |
Source: USGS Earthquake Catalog (M2.5+, 1990–2025). Sorted by magnitude.
Tornado History
51 tornadoes (EF0+) recorded within 100 km since 1950. Strongest on record: EF1. Total: 1 injury.
| Date | Rating | Distance | Path | Fatalities |
| Jun 8, 1989 | EF1 | 97 km | 5.0 mi | 0 |
| Sep 13, 1988 | EF1 | 73 km | 0.2 mi | 0 |
| Apr 15, 1971 | EF1 | 39 km | 2.0 mi | 0 |
| Dec 26, 1966 | EF1 | 26 km | 0.3 mi | 0 |
| May 31, 1965 | EF1 | 84 km | 0.1 mi | 0 |
| Aug 20, 1956 | EF1 | 81 km | 0.5 mi | 0 |
| Oct 1, 2023 | EF0 | 93 km | 1.3 mi | 0 |
| Jul 23, 2021 | EF0 | 71 km | 0.0 mi | 0 |
| Jul 13, 2021 | EF0 | 67 km | 0.2 mi | 0 |
| Jun 2, 2021 | EF0 | 98 km | 1.8 mi | 0 |
| May 17, 2021 | EF0 | 42 km | 1.7 mi | 0 |
| Aug 15, 2020 | EF0 | 87 km | 0.0 mi | 0 |
| Feb 17, 2019 | EF0 | 92 km | 0.2 mi | 0 |
| May 21, 2018 | EF0 | 23 km | 3.8 mi | 0 |
| Jul 6, 2017 | EF0 | 53 km | 0.0 mi | 0 |
| May 9, 2017 | EF0 | 36 km | 0.3 mi | 0 |
| Aug 13, 2016 | EF0 | 96 km | 0.0 mi | 0 |
| Jul 7, 2015 | EF0 | 92 km | 0.3 mi | 0 |
| Jun 21, 2014 | EF0 | 97 km | 0.1 mi | 0 |
| Oct 12, 2012 | EF0 | 63 km | 5.8 mi | 0 |
Source: NOAA Storm Prediction Center (EF0+, 1950–2024, US only).
Nearby Volcanoes
1 volcano within 200 km. Closest: Zuni-Bandera (197 km).
| Name | Type | Elevation | Last Eruption | Distance |
| Zuni-Bandera | Volcanic field | 2,550 m (8,366 ft) | -1170 | 197 km |
Source: Smithsonian Institution Global Volcanism Program (GVP).
Wildfire History
20 wildfires (100+ acres) recorded within 100 km. Largest: HERMITS PEAK (352,046 acres, 2022).
| Year | Name | Acres Burned | Distance |
| 2022 | HERMITS PEAK | 352,046 | 79 km |
| 2011 | LAS CONCHAS | 150,874 | 12 km |
| 2022 | CERRO PELADO | 45,620 | 24 km |
| 2000 | CERRO GRANDE | 44,279 | 3 km |
| 2000 | VIVEASH | 22,468 | 66 km |
| 2013 | THOMPSON RIDGE | 21,077 | 24 km |
| 1996 | DOME | 15,783 | 16 km |
| 2002 | BORREGO | 12,877 | 46 km |
| 2010 | SOUTH FORK | 12,585 | 22 km |
| 2020 | LUNA | 10,849 | 91 km |
| 2011 | PACHECO | 9,790 | 45 km |
| 2013 | JAROSO | 9,529 | 55 km |
| 2017 | BONITA | 7,754 | 77 km |
| 2017 | HONDITO | 6,949 | 83 km |
| 2003 | CAPULIN | 6,155 | 41 km |
| 2013 | TRES LAGUNAS | 5,832 | 59 km |
| 1998 | OSO | 5,297 | 14 km |
| 2022 | MIDNIGHT | 5,293 | 61 km |
| 2003 | ENCEBADO | 5,064 | 93 km |
| 2023 | ALAMOSA RX UNIT 1 FY24 | 4,616 | 63 km |
Source: NIFC/IRWIN Wildfire Records (100+ acres).
Monthly Weather
| Month | Avg Temperature | Precipitation | Summary |
|---|---|---|---|
| January | 30°F (-1°C) | 0.8 in | Coldest |
| February | 33°F (1°C) | 0.8 in | Driest |
| March | 40°F (4°C) | 1.1 in | |
| April | 47°F (8°C) | 0.9 in | |
| May | 55°F (13°C) | 1.1 in | |
| June | 65°F (18°C) | 1.2 in | |
| July | 70°F (21°C) | 2.7 in | Warmest |
| August | 68°F (20°C) | 2.9 in | Wettest |
| September | 62°F (17°C) | 1.9 in | |
| October | 51°F (11°C) | 1.3 in | |
| November | 39°F (4°C) | 0.9 in | |
| December | 31°F (-0°C) | 0.9 in |
Los Alamos has a seasonal temperature swing of 39°F / from 30°F in January to 70°F in July. Total annual precipitation is 16.3 inches, with August being the wettest month (2.9") and February the driest (0.8").