Blanca, CO Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Blanca, a town in Costilla County, Colorado.
Overnight
45°F
Mostly Cloudy
Mostly cloudy, with a low around 45. East southeast wind around 0 mph.
7-day forecast for Blanca
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Overnight | 45°F | Mostly Cloudy | 0 mph | 4% |
| Saturday | 72°F | Mostly Sunny then Slight Chance Showers And Thunderstorms | 0 to 20 mph SSW | 14% |
| Saturday Night | 41°F | Mostly Clear | 5 to 15 mph SE | 5% |
| Sunday | 72°F | Sunny | 5 to 15 mph SW | 0% |
| Sunday Night | 41°F | Mostly Clear | 5 to 15 mph SSE | 1% |
| Monday | 73°F | Sunny | 0 to 10 mph S | 0% |
| Monday Night | 43°F | Partly Cloudy | 5 to 15 mph SE | 1% |
| Tuesday | 71°F | Mostly Sunny then Chance Showers And Thunderstorms | 5 to 15 mph S | 49% |
| Tuesday Night | 43°F | Chance Showers And Thunderstorms | 5 to 15 mph S | 52% |
| Wednesday | 67°F | Chance Rain Showers then Chance Showers And Thunderstorms | 10 mph SSW | 51% |
| Wednesday Night | 43°F | Chance Showers And Thunderstorms | 5 to 10 mph S | 26% |
| Thursday | 68°F | Slight Chance Rain Showers then Chance Showers And Thunderstorms | 5 to 10 mph SW | 37% |
| Thursday Night | 43°F | Chance Showers And Thunderstorms | 5 to 10 mph SE | 46% |
| Friday | 68°F | Chance Rain Showers | 5 to 10 mph SSW | 51% |
Forecast source: National Weather Service (api.weather.gov) for Blanca (37.439, -105.514). Updated through the day.
Growing snapshot for Blanca
Last spring frost
May 25
First fall frost
Sep 22
Growing season
117 days
Hardiness zone
5a
More local growing data for Blanca: nearby ZIP 81123 weather · frost dates · planting calendar · Colorado frost dates
Nearby towns & communities
Climate data from the nearest NOAA station, Blanca 4 Nw, Co (4.7 mi from Blanca). Frost dates are 1991–2020 averages, not a forecast. Page updated Sep 19, 2026.