Bonanza, CO Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Bonanza, a town in Saguache County, Colorado.
Tonight
41°F
Mostly Cloudy
Mostly cloudy, with a low around 41. Southwest wind around 5 mph. New rainfall amounts less than a tenth of an inch possible.
7-day forecast for Bonanza
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Tonight | 41°F | Mostly Cloudy | 5 mph SW | 4% |
| Saturday | 58°F | Mostly Sunny then Chance Showers And Thunderstorms | 5 to 10 mph WSW | 44% |
| Saturday Night | 38°F | Partly Cloudy | 5 to 10 mph W | 8% |
| Sunday | 59°F | Sunny | 5 to 15 mph WSW | 0% |
| Sunday Night | 37°F | Mostly Clear | 5 to 10 mph WNW | 1% |
| Monday | 61°F | Mostly Sunny | 5 to 10 mph WSW | 0% |
| Monday Night | 40°F | Partly Cloudy | 5 mph WNW | 0% |
| Tuesday | 58°F | Mostly Sunny then Chance Showers And Thunderstorms | 5 to 10 mph SW | 46% |
| Tuesday Night | 43°F | Chance Showers And Thunderstorms | 5 mph SSW | 52% |
| Wednesday | 56°F | Chance Rain Showers then Chance Showers And Thunderstorms | 5 to 10 mph SSW | 50% |
| Wednesday Night | 42°F | Chance Showers And Thunderstorms | 5 mph WSW | 25% |
| Thursday | 57°F | Chance Showers And Thunderstorms | 5 to 10 mph SSW | 35% |
| Thursday Night | 43°F | Chance Showers And Thunderstorms | 5 mph SW | 41% |
| Friday | 56°F | Slight Chance Rain Showers then Chance Showers And Thunderstorms | 5 to 10 mph SW | 41% |
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 19, 2026.