Glendale, CO Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Glendale, a community in Boulder County, Colorado.
Tonight
34°F
Mostly Clear
Mostly clear, with a low around 34. South southwest wind around 3 mph.
7-day forecast for Glendale
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Tonight | 34°F | Mostly Clear | 3 mph SSW | 0% |
| Wednesday | 47°F | Mostly Sunny then Slight Chance Rain And Snow Showers | 0 to 6 mph ENE | 18% |
| Wednesday Night | 33°F | Slight Chance Rain And Snow Showers then Mostly Cloudy | 3 mph NW | 18% |
| Thursday | 51°F | Sunny | 0 to 7 mph SSE | 0% |
| Thursday Night | 36°F | Partly Cloudy | 3 mph WSW | 1% |
| Friday | 50°F | Mostly Sunny then Slight Chance Rain And Snow Showers | 0 to 5 mph SW | 16% |
| Friday Night | 34°F | Slight Chance Rain And Snow Showers then Partly Cloudy | 2 to 8 mph WNW | 16% |
| Saturday | 53°F | Sunny | 0 to 10 mph NE | 2% |
| Saturday Night | 35°F | Clear | 1 to 7 mph WNW | 1% |
| Sunday | 61°F | Sunny | 1 to 10 mph W | 0% |
| Sunday Night | 44°F | Mostly Clear | 6 to 13 mph W | 0% |
| Monday | 60°F | Mostly Sunny | 1 to 12 mph NNW | 0% |
| Monday Night | 42°F | Partly Cloudy | 1 to 7 mph WNW | 0% |
| Tuesday | 58°F | Mostly Sunny | 1 to 7 mph NW | 7% |
Forecast source: National Weather Service (api.weather.gov) for Glendale (40.087, -105.372). Updated through the day.
Growing snapshot for Glendale
Last spring frost
Jun 21
First fall frost
Sep 2
Growing season
71 days
Hardiness zone
5b
More local growing data for Glendale: nearby ZIP 80455 weather · frost dates · planting calendar · Colorado frost dates
Nearby towns & communities
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Altona
Bark Ranch
Bonanza Mountain Estates
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Crisman
Eldorado Springs
Gold Hill
Gunbarrel
Hidden Lake
Jamestown
Lafayette
Lazy Acres
Leyner
Longmont
Louisville
Lyons
Mountain Meadows
Nederland
Niwot
Paragon Estates
Pine Brook Hill
Seven Hills
St. Ann Highlands
Sugarloaf
Sunshine
Superior
Tall Timber
Valmont
Climate data from the nearest NOAA station, Boulder 14 W, Co (8.6 mi from Glendale). Frost dates are 1991–2020 averages, not a forecast. Page updated Nov 4, 2026.