Leyner, CO Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Leyner, a community in Boulder County, Colorado.
This Afternoon
56°F
Mostly Cloudy
Mostly cloudy. High near 56, with temperatures falling to around 51 in the afternoon. Northeast wind around 5 mph.
7-day forecast for Leyner
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| This Afternoon | 56°F | Mostly Cloudy | 5 mph NE | 7% |
| Tonight | 36°F | Mostly Cloudy | 3 mph NW | 7% |
| Thursday | 59°F | Sunny | 5 mph SSE | 0% |
| Thursday Night | 35°F | Mostly Cloudy | 2 mph WSW | 0% |
| Friday | 55°F | Mostly Sunny | 0 to 3 mph N | 6% |
| Friday Night | 34°F | Mostly Clear | 3 mph WNW | 6% |
| Saturday | 59°F | Sunny | 0 to 5 mph ESE | 0% |
| Saturday Night | 34°F | Mostly Clear | 2 mph W | 0% |
| Sunday | 65°F | Sunny | 3 mph SSW | 0% |
| Sunday Night | 37°F | Mostly Clear | 2 to 6 mph WSW | 0% |
| Monday | 66°F | Sunny | 1 to 5 mph ESE | 0% |
| Monday Night | 38°F | Partly Cloudy | 1 mph NW | 0% |
| Tuesday | 63°F | Mostly Sunny | 2 mph NE | 1% |
| Tuesday Night | 38°F | Partly Cloudy | 2 mph W | 1% |
Forecast source: National Weather Service (api.weather.gov) for Leyner (40.051, -105.107). Updated through the day.
Growing snapshot for Leyner
Last spring frost
May 6
First fall frost
Oct 5
Growing season
151 days
Hardiness zone
6a
More local growing data for Leyner: nearby ZIP 80026 weather · frost dates · planting calendar · Colorado frost dates
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Climate data from the nearest NOAA station, Boulder, Co (8.9 mi from Leyner). Frost dates are 1991–2020 averages, not a forecast. Page updated Nov 5, 2026.