Leyner, CO Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Leyner, a community in Boulder County, Colorado.
Today
79°F
Patchy Smoke
Patchy smoke and a slight chance of rain showers. Mostly sunny. High near 79, with temperatures falling to around 77 in the afternoon. East northeast wind 5 to 9 mph. Chance of precipitation is 20%.
7-day forecast for Leyner
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Today | 79°F | Patchy Smoke | 5 to 9 mph ENE | 15% |
| Tonight | 54°F | Patchy Smoke | 3 to 9 mph NNE | 9% |
| Wednesday | 86°F | Patchy Smoke | 3 to 9 mph NE | 0% |
| Wednesday Night | 57°F | Mostly Clear | 2 to 8 mph N | 1% |
| Thursday | 95°F | Sunny | 2 to 8 mph NW | 0% |
| Thursday Night | 60°F | Mostly Clear | 3 to 7 mph WSW | 1% |
| Friday | 98°F | Sunny | 2 to 8 mph S | 0% |
| Friday Night | 63°F | Mostly Clear | 7 mph SSW | 0% |
| Saturday | 100°F | Sunny | 2 to 7 mph N | 2% |
| Saturday Night | 63°F | Partly Cloudy | 7 mph W | 0% |
| Sunday | 99°F | Sunny | 3 to 8 mph NNE | 8% |
| Sunday Night | 66°F | Partly Cloudy | 5 to 8 mph W | 4% |
| Monday | 98°F | Mostly Sunny then Slight Chance Showers And Thunderstorms | 5 to 10 mph N | 23% |
| Monday Night | 65°F | Slight Chance Showers And Thunderstorms then Mostly Cloudy | 3 to 10 mph W | 17% |
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 Aug 4, 2026.