Glendale, CO Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Glendale, a community in Boulder County, Colorado.
Today
69°F
Patchy Smoke
Patchy smoke and a slight chance of rain showers before noon, then patchy smoke and a slight chance of showers and thunderstorms. Mostly sunny. High near 69, with temperatures falling to around 66 in the afternoon. East wind 3 to 7 mph. Chance of precipitation is 20%.
7-day forecast for Glendale
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Today | 69°F | Patchy Smoke | 3 to 7 mph E | 18% |
| Tonight | 54°F | Patchy Smoke | 1 to 6 mph NE | 12% |
| Wednesday | 77°F | Patchy Smoke then Sunny | 3 to 8 mph NNE | 3% |
| Wednesday Night | 57°F | Mostly Clear | 2 to 6 mph SW | 1% |
| Thursday | 85°F | Sunny | 1 to 5 mph NNE | 2% |
| Thursday Night | 61°F | Mostly Clear | 6 mph NNW | 1% |
| Friday | 87°F | Sunny | 2 to 6 mph NNW | 0% |
| Friday Night | 64°F | Mostly Clear | 2 to 8 mph WSW | 0% |
| Saturday | 89°F | Sunny | 2 to 8 mph N | 5% |
| Saturday Night | 67°F | Mostly Clear | 6 mph WNW | 1% |
| Sunday | 88°F | Sunny | 5 mph N | 9% |
| Sunday Night | 68°F | Partly Cloudy | 3 to 7 mph WNW | 7% |
| Monday | 87°F | Slight Chance Rain Showers then Chance Showers And Thunderstorms | 7 mph NE | 40% |
| Monday Night | 66°F | Slight Chance Showers And Thunderstorms then Partly Cloudy | 6 mph WSW | 22% |
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
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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 Aug 4, 2026.