Los Alamos, NM Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Los Alamos, a community in Los Alamos County, New Mexico.
Today
92°F
Mostly Sunny then Slight Chance Showers And Thunderstorms
A slight chance of showers and thunderstorms after 3pm. Mostly sunny. High near 92, with temperatures falling to around 86 in the afternoon. Southeast wind 5 to 10 mph. Chance of precipitation is 20%. New rainfall amounts less than a tenth of an inch possible.
7-day forecast for Los Alamos
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Today | 92°F | Mostly Sunny then Slight Chance Showers And Thunderstorms | 5 to 10 mph SE | 18% |
| Tonight | 64°F | Slight Chance Showers And Thunderstorms then Partly Cloudy | 5 to 10 mph SW | 21% |
| Wednesday | 89°F | Sunny then Chance Showers And Thunderstorms | 5 mph SW | 27% |
| Wednesday Night | 61°F | Partly Cloudy | 5 to 10 mph SW | 4% |
| Thursday | 90°F | Sunny then Slight Chance Showers And Thunderstorms | 5 mph S | 18% |
| Thursday Night | 63°F | Mostly Clear | 0 to 10 mph SW | 6% |
| Friday | 90°F | Sunny | 0 to 5 mph E | 13% |
| Friday Night | 63°F | Partly Cloudy | 0 to 10 mph SW | 2% |
| Saturday | 91°F | Mostly Sunny then Slight Chance Showers And Thunderstorms | 0 to 5 mph SE | 24% |
| Saturday Night | 63°F | Slight Chance Showers And Thunderstorms then Partly Cloudy | 5 mph SW | 20% |
| Sunday | 90°F | Sunny then Slight Chance Showers And Thunderstorms | 0 to 5 mph S | 15% |
| Sunday Night | 63°F | Slight Chance Showers And Thunderstorms then Partly Cloudy | 5 mph W | 19% |
| Monday | 90°F | Mostly Sunny then Chance Showers And Thunderstorms | 0 to 5 mph SE | 25% |
| Monday Night | 62°F | Chance Showers And Thunderstorms then Mostly Cloudy | 5 mph NW | 33% |
Forecast source: National Weather Service (api.weather.gov) for Los Alamos (35.894, -106.290). Updated through the day.
Growing snapshot for Los Alamos
Last spring frost
May 2
First fall frost
Oct 12
Growing season
162 days
Hardiness zone
7b
More local growing data for Los Alamos: nearby ZIP 87547 weather · frost dates · planting calendar · New Mexico frost dates
Nearby towns & communities
Climate data from the nearest NOAA station, Los Alamos, Nm (7.4 mi from Los Alamos). Frost dates are 1991–2020 averages, not a forecast. Page updated Aug 4, 2026.