Alamosa, CO Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Alamosa, a city in Alamosa County, Colorado.
This Afternoon
55°F
Sunny
Sunny, with a high near 55. Southwest wind around 15 mph, with gusts as high as 40 mph.
7-day forecast for Alamosa
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| This Afternoon | 55°F | Sunny | 15 mph SW | 7% |
| Tonight | 23°F | Partly Cloudy | 0 to 10 mph NW | 10% |
| Thursday | 53°F | Sunny | 0 to 10 mph NNE | 2% |
| Thursday Night | 24°F | Mostly Cloudy | 0 to 5 mph SSE | 0% |
| Friday | 52°F | Partly Sunny | 0 to 5 mph E | 4% |
| Friday Night | 22°F | Partly Cloudy | 0 to 5 mph N | 4% |
| Saturday | 52°F | Sunny | 5 mph N | 1% |
| Saturday Night | 23°F | Mostly Clear | 0 to 5 mph NNW | 0% |
| Sunday | 54°F | Sunny | 0 to 5 mph NNW | 0% |
| Sunday Night | 24°F | Mostly Clear | 0 mph | 0% |
| Monday | 56°F | Sunny | 0 to 5 mph NNW | 0% |
| Monday Night | 25°F | Partly Cloudy | 0 mph | 1% |
| Tuesday | 55°F | Mostly Sunny | 0 to 5 mph WSW | 1% |
| Tuesday Night | 26°F | Partly Cloudy | 0 mph | 1% |
Forecast source: National Weather Service (api.weather.gov) for Alamosa (37.475, -105.877). Updated through the day.
Growing snapshot for Alamosa
Last spring frost
May 30
First fall frost
Sep 17
Growing season
108 days
Hardiness zone
4b
More local growing data for Alamosa: nearby ZIP 81101 weather · frost dates · planting calendar · Colorado frost dates
Nearby towns & communities
Climate data from the nearest NOAA station, Alamosa 1E, Co (0.2 mi from Alamosa). Frost dates are 1991–2020 averages, not a forecast. Page updated Nov 5, 2026.