San Luis, CO Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for San Luis, a town in Costilla County, Colorado.
Overnight
30°F
Mostly Clear
Mostly clear, with a low around 30. Southeast wind 5 to 10 mph.
7-day forecast for San Luis
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Overnight | 30°F | Mostly Clear | 5 to 10 mph SE | 0% |
| Wednesday | 51°F | Sunny then Slight Chance Rain Showers | 5 to 20 mph S | 15% |
| Wednesday Night | 30°F | Slight Chance Rain And Snow Showers | 0 to 15 mph ESE | 18% |
| Thursday | 48°F | Sunny | 0 to 10 mph NNW | 9% |
| Thursday Night | 31°F | Partly Cloudy | 5 mph SE | 0% |
| Friday | 49°F | Partly Sunny | 5 mph SSW | 6% |
| Friday Night | 29°F | Partly Cloudy | 5 mph ESE | 7% |
| Saturday | 50°F | Sunny | 0 to 10 mph N | 10% |
| Saturday Night | 30°F | Mostly Clear | 0 to 5 mph ESE | 0% |
| Sunday | 54°F | Sunny | 0 to 5 mph S | 0% |
| Sunday Night | 33°F | Mostly Clear | 0 to 5 mph SSE | 0% |
| Monday | 56°F | Sunny | 0 to 5 mph SSW | 0% |
| Monday Night | 34°F | Partly Cloudy | 5 mph SE | 1% |
| Tuesday | 55°F | Mostly Sunny | 5 mph S | 0% |
Forecast source: National Weather Service (api.weather.gov) for San Luis (37.202, -105.423). Updated through the day.
Growing snapshot for San Luis
Last spring frost
May 31
First fall frost
Sep 23
Growing season
115 days
Hardiness zone
5b
More local growing data for San Luis: nearby ZIP 81152 weather · frost dates · planting calendar · Colorado frost dates
Nearby towns & communities
Climate data from the nearest NOAA station, San Luis 1 S, Co (4.5 mi from San Luis). Frost dates are 1991–2020 averages, not a forecast. Page updated Nov 4, 2026.