Gunbarrel, CO Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Gunbarrel, a community in Boulder County, Colorado.
This Afternoon
56°F
Sunny
Sunny. High near 56, with temperatures falling to around 51 in the afternoon. East wind around 3 mph.
7-day forecast for Gunbarrel
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| This Afternoon | 56°F | Sunny | 3 mph E | 0% |
| Tonight | 32°F | Mostly Clear | 3 mph SSW | 0% |
| Wednesday | 55°F | Mostly Sunny | 0 to 5 mph NE | 9% |
| Wednesday Night | 33°F | Mostly Cloudy | 3 mph WNW | 9% |
| Thursday | 57°F | Sunny | 1 to 5 mph SSE | 0% |
| Thursday Night | 34°F | Partly Cloudy | 2 mph WSW | 1% |
| Friday | 57°F | Mostly Sunny | 1 to 6 mph E | 9% |
| Friday Night | 33°F | Mostly Clear | 3 mph WSW | 9% |
| Saturday | 59°F | Sunny | 1 to 5 mph S | 1% |
| Saturday Night | 32°F | Mostly Clear | 3 mph WSW | 0% |
| Sunday | 66°F | Sunny | 3 mph SSW | 0% |
| Sunday Night | 39°F | Mostly Clear | 3 to 7 mph WSW | 0% |
| Monday | 65°F | Mostly Sunny | 2 to 6 mph E | 0% |
| Monday Night | 38°F | Partly Cloudy | 2 mph WNW | 0% |
Forecast source: National Weather Service (api.weather.gov) for Gunbarrel (40.063, -105.172). Updated through the day.
Growing snapshot for Gunbarrel
Last spring frost
May 6
First fall frost
Oct 5
Growing season
151 days
Hardiness zone
6a
More local growing data for Gunbarrel: nearby ZIP 80301 weather · frost dates · planting calendar · Colorado frost dates
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Climate data from the nearest NOAA station, Boulder, Co (5.1 mi from Gunbarrel). Frost dates are 1991–2020 averages, not a forecast. Page updated Nov 4, 2026.