Westminster, CO Weather & Growing Conditions
Today
78°F
Partly Sunny then Chance Showers And Thunderstorms
A chance of showers and thunderstorms after noon. Partly sunny. High near 78, with temperatures falling to around 71 in the afternoon. Northeast wind 6 to 9 mph. Chance of precipitation is 50%. New rainfall amounts less than a tenth of an inch possible.
7-day forecast
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Today | 78°F | Partly Sunny then Chance Showers And Thunderstorms | 6 to 9 mph NE | 47% |
| Tonight | 51°F | Chance Showers And Thunderstorms then Partly Cloudy | 0 to 8 mph WSW | 29% |
| Sunday | 69°F | Chance Showers And Thunderstorms | 0 to 8 mph NNE | 29% |
| Sunday Night | 50°F | Slight Chance Rain Showers then Partly Cloudy | 0 to 8 mph NW | 22% |
| Monday | 72°F | Sunny | 0 to 9 mph NE | 2% |
| Monday Night | 52°F | Partly Cloudy | 0 to 8 mph N | 5% |
| Tuesday | 77°F | Mostly Sunny | 0 to 7 mph NNW | 8% |
| Tuesday Night | 53°F | Slight Chance Showers And Thunderstorms then Partly Cloudy | 5 mph SW | 19% |
| Wednesday | 76°F | Mostly Sunny | 5 mph N | 14% |
| Wednesday Night | 53°F | Mostly Cloudy | 5 mph SW | 11% |
| Thursday | 78°F | Mostly Sunny | 3 to 7 mph SSW | 9% |
| Thursday Night | 55°F | Partly Cloudy | 1 to 6 mph SSW | 13% |
| Friday | 79°F | Mostly Sunny | 1 to 6 mph S | 14% |
| Friday Night | 56°F | Slight Chance Rain Showers then Partly Cloudy | 5 mph SSW | 16% |
Forecast source: National Weather Service (api.weather.gov). Updated through the day.
Growing snapshot for Westminster, CO
Last spring frost
May 2
First fall frost
Oct 11
Growing season
160 days
Hardiness zone
6a
Explore more for Westminster, CO: full frost dates · planting calendar · Colorado frost dates
Climate data from the nearest NOAA station, Northglenn, Co (5.4 mi). Frost dates are 1991–2020 averages, not a forecast. Page updated Sep 19, 2026.