Bonanza, CO Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Bonanza, a town in Saguache County, Colorado.
Tonight
37°F
Mostly Clear
Mostly clear, with a low around 37. West wind 5 to 10 mph. New rainfall amounts less than a tenth of an inch possible.
7-day forecast for Bonanza
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Tonight | 37°F | Mostly Clear | 5 to 10 mph W | 7% |
| Sunday | 57°F | Sunny | 5 to 15 mph W | 1% |
| Sunday Night | 36°F | Mostly Clear | 5 to 15 mph NW | 0% |
| Monday | 58°F | Sunny | 5 to 10 mph WSW | 0% |
| Monday Night | 39°F | Partly Cloudy | 5 to 10 mph ESE | 0% |
| Tuesday | 56°F | Partly Sunny then Showers And Thunderstorms Likely | 5 to 10 mph S | 55% |
| Tuesday Night | 43°F | Chance Showers And Thunderstorms | 5 mph S | 49% |
| Wednesday | 56°F | Chance Rain Showers then Chance Showers And Thunderstorms | 5 to 10 mph SW | 34% |
| Wednesday Night | 42°F | Slight Chance Showers And Thunderstorms then Mostly Cloudy | 5 mph W | 16% |
| Thursday | 58°F | Partly Sunny then Slight Chance Showers And Thunderstorms | 5 mph SW | 23% |
| Thursday Night | 44°F | Chance Showers And Thunderstorms | 5 mph NNE | 50% |
| Friday | 54°F | Showers And Thunderstorms Likely | 5 to 10 mph S | 62% |
| Friday Night | 43°F | Chance Showers And Thunderstorms | 5 mph SW | 46% |
| Saturday | 58°F | Chance Rain Showers | 5 to 10 mph WSW | 37% |
Forecast source: National Weather Service (api.weather.gov) for Bonanza (38.297, -106.142). Updated through the day.
Growing snapshot for Bonanza
Last spring frost
May 16
First fall frost
Sep 28
Growing season
135 days
Hardiness zone
5b
More local growing data for Bonanza: nearby ZIP 81155 weather · frost dates · planting calendar · Colorado frost dates
Nearby towns & communities
Climate data from the nearest NOAA station, Saguache, Co (14.5 mi from Bonanza). Frost dates are 1991–2020 averages, not a forecast. Page updated Sep 20, 2026.