Blanca, CO Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Blanca, a town in Costilla County, Colorado.
Overnight
56°F
Patchy Smoke
Patchy smoke. Partly cloudy, with a low around 56. East northeast wind around 30 mph, with gusts as high as 45 mph.
7-day forecast for Blanca
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Overnight | 56°F | Patchy Smoke | 30 mph ENE | 0% |
| Tuesday | 87°F | Patchy Smoke then Chance Showers And Thunderstorms | 5 to 25 mph ESE | 33% |
| Tuesday Night | 55°F | Chance Showers And Thunderstorms then Partly Cloudy | 5 to 15 mph ENE | 26% |
| Wednesday | 88°F | Sunny | 10 to 15 mph WSW | 3% |
| Wednesday Night | 53°F | Mostly Clear | 5 to 15 mph E | 3% |
| Thursday | 90°F | Sunny | 5 to 15 mph WSW | 3% |
| Thursday Night | 56°F | Mostly Clear | 5 to 15 mph ENE | 1% |
| Friday | 89°F | Sunny | 5 to 15 mph SSW | 5% |
| Friday Night | 56°F | Mostly Clear | 10 to 15 mph ESE | 1% |
| Saturday | 90°F | Sunny | 5 to 10 mph S | 3% |
| Saturday Night | 57°F | Partly Cloudy | 10 to 15 mph SE | 5% |
| Sunday | 89°F | Sunny | 5 to 10 mph SSW | 6% |
| Sunday Night | 57°F | Slight Chance Showers And Thunderstorms then Partly Cloudy | 10 mph SSE | 15% |
| Monday | 89°F | Sunny then Slight Chance Showers And Thunderstorms | 5 to 10 mph SSE | 14% |
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 Aug 4, 2026.