Leyner, CO Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Leyner, a community in Boulder County, Colorado.
Tonight
53°F
Chance Showers And Thunderstorms then Mostly Cloudy
A chance of showers and thunderstorms before 8pm, then a slight chance of showers and thunderstorms between 8pm and 9pm. Mostly cloudy, with a low around 53. West wind 2 to 7 mph. Chance of precipitation is 30%. New rainfall amounts less than a tenth of an inch possible.
7-day forecast for Leyner
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Tonight | 53°F | Chance Showers And Thunderstorms then Mostly Cloudy | 2 to 7 mph W | 30% |
| Saturday | 76°F | Partly Sunny then Chance Showers And Thunderstorms | 1 to 7 mph NW | 67% |
| Saturday Night | 50°F | Chance Showers And Thunderstorms | 1 to 5 mph W | 52% |
| Sunday | 71°F | Showers And Thunderstorms Likely | 1 to 5 mph NE | 55% |
| Sunday Night | 47°F | Chance Rain Showers then Partly Cloudy | 0 to 5 mph NW | 33% |
| Monday | 73°F | Sunny | 0 to 6 mph ENE | 2% |
| Monday Night | 49°F | Mostly Clear | 1 to 5 mph N | 10% |
| Tuesday | 77°F | Mostly Sunny | 1 to 5 mph NE | 12% |
| Tuesday Night | 51°F | Slight Chance Showers And Thunderstorms then Partly Cloudy | 3 mph WSW | 19% |
| Wednesday | 77°F | Partly Sunny | 1 to 5 mph NE | 13% |
| Wednesday Night | 51°F | Slight Chance Rain Showers then Mostly Cloudy | 3 mph SSW | 18% |
| Thursday | 78°F | Mostly Sunny | 1 to 6 mph NNE | 13% |
| Thursday Night | 52°F | Chance Rain Showers then Mostly Cloudy | 3 mph SW | 26% |
| Friday | 79°F | Mostly Sunny then Slight Chance Showers And Thunderstorms | 1 to 6 mph NE | 16% |
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 Sep 19, 2026.