San Luis, CO Weather & Growing Conditions
Tonight
47°F
Mostly Cloudy
Mostly cloudy, with a low around 47. South southeast wind 5 to 10 mph. New rainfall amounts less than a tenth of an inch possible.
7-day forecast
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Tonight | 47°F | Mostly Cloudy | 5 to 10 mph SSE | 11% |
| Saturday | 71°F | Mostly Sunny then Slight Chance Showers And Thunderstorms | 5 to 20 mph SW | 15% |
| Saturday Night | 44°F | Mostly Clear | 5 to 20 mph S | 8% |
| Sunday | 71°F | Sunny | 5 to 15 mph SW | 0% |
| Sunday Night | 43°F | Mostly Clear | 5 to 15 mph SSE | 1% |
| Monday | 71°F | Mostly Sunny | 5 to 15 mph SSW | 1% |
| Monday Night | 46°F | Partly Cloudy | 10 to 15 mph SSE | 2% |
| Tuesday | 69°F | Mostly Sunny then Showers And Thunderstorms Likely | 5 to 15 mph SSW | 56% |
| Tuesday Night | 46°F | Showers And Thunderstorms Likely | 5 to 10 mph S | 57% |
| Wednesday | 65°F | Rain Showers Likely | 5 to 10 mph SSW | 62% |
| Wednesday Night | 45°F | Chance Showers And Thunderstorms | 5 to 10 mph S | 40% |
| Thursday | 66°F | Chance Rain Showers then Chance Showers And Thunderstorms | 5 to 10 mph SW | 54% |
| Thursday Night | 46°F | Chance Showers And Thunderstorms | 5 to 10 mph SSE | 44% |
| Friday | 66°F | Chance Rain Showers then Chance Showers And Thunderstorms | 5 to 10 mph SSW | 51% |
Forecast source: National Weather Service (api.weather.gov). Updated through the day.
Growing snapshot for San Luis, CO
Last spring frost
May 31
First fall frost
Sep 23
Growing season
115 days
Hardiness zone
5b
Explore more for San Luis, CO: full frost dates · planting calendar · Colorado frost dates
Climate data from the nearest NOAA station, San Luis 1 S, Co (4.5 mi). Frost dates are 1991–2020 averages, not a forecast. Page updated Sep 19, 2026.