Westminster, CO Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Westminster, a city in Adams County, Colorado.
Overnight
60°F
Patchy Smoke
Patchy smoke. Mostly cloudy. Low around 60, with temperatures rising to around 62 overnight. North northeast wind around 10 mph, with gusts as high as 16 mph.
7-day forecast for Westminster
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Overnight | 60°F | Patchy Smoke | 10 mph NNE | 12% |
| Tuesday | 79°F | Patchy Smoke | 6 to 9 mph ENE | 16% |
| Tuesday Night | 57°F | Patchy Smoke | 3 to 8 mph NNE | 11% |
| Wednesday | 87°F | Patchy Smoke | 3 to 8 mph NE | 0% |
| Wednesday Night | 61°F | Mostly Clear | 3 to 8 mph SE | 2% |
| Thursday | 95°F | Sunny | 2 to 8 mph N | 0% |
| Thursday Night | 64°F | Mostly Clear | 5 to 8 mph SSW | 2% |
| Friday | 98°F | Sunny | 3 to 8 mph SSE | 0% |
| Friday Night | 68°F | Mostly Clear | 8 mph SSE | 0% |
| Saturday | 99°F | Sunny | 3 to 8 mph NNE | 1% |
| Saturday Night | 68°F | Partly Cloudy | 5 to 8 mph W | 0% |
| Sunday | 99°F | Sunny | 7 mph ESE | 8% |
| Sunday Night | 69°F | Partly Cloudy | 5 to 8 mph WNW | 3% |
| Monday | 98°F | Sunny then Slight Chance Showers And Thunderstorms | 5 to 10 mph N | 18% |
Forecast source: National Weather Service (api.weather.gov) for Westminster (39.880, -105.062). Updated through the day.
Growing snapshot for Westminster
Last spring frost
May 2
First fall frost
Oct 11
Growing season
160 days
Hardiness zone
6a
More local growing data for Westminster: nearby ZIP 80031 weather · frost dates · planting calendar · Colorado frost dates
Nearby towns & communities
Bennett
Berkley
Brighton
Byers
Comanche Creek
Commerce City
Derby
Federal Heights
Lochbuie
Northglenn
Peoria
Shaw Heights
Sherrelwood
Strasburg
Thornton
Todd Creek
Twin Lakes
Welby
Climate data from the nearest NOAA station, Northglenn, Co (2.2 mi from Westminster). Frost dates are 1991–2020 averages, not a forecast. Page updated Aug 4, 2026.