Westminster, CO Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Westminster, a city in Adams County, Colorado.
This Afternoon
56°F
Sunny
Sunny. High near 56, with temperatures falling to around 52 in the afternoon. East northeast wind around 3 mph.
7-day forecast for Westminster
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| This Afternoon | 56°F | Sunny | 3 mph ENE | 0% |
| Tonight | 34°F | Mostly Clear | 3 mph S | 0% |
| Wednesday | 56°F | Mostly Sunny | 1 to 5 mph N | 10% |
| Wednesday Night | 36°F | Mostly Cloudy | 3 mph NW | 10% |
| Thursday | 58°F | Sunny | 2 to 6 mph SSE | 0% |
| Thursday Night | 36°F | Partly Cloudy | 2 mph SW | 1% |
| Friday | 57°F | Mostly Sunny | 5 mph N | 9% |
| Friday Night | 36°F | Mostly Clear | 3 mph SW | 9% |
| Saturday | 59°F | Sunny | 2 to 6 mph SE | 1% |
| Saturday Night | 35°F | Clear | 3 mph W | 0% |
| Sunday | 67°F | Sunny | 2 to 6 mph S | 0% |
| Sunday Night | 41°F | Mostly Clear | 2 to 6 mph WSW | 0% |
| Monday | 66°F | Sunny | 6 mph ESE | 0% |
| Monday Night | 40°F | Partly Cloudy | 3 mph W | 0% |
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 Nov 4, 2026.