Castle Pines, CO Weather & Growing Conditions
Today
79°F
Patchy Smoke
Patchy smoke before noon, then patchy smoke and a slight chance of showers and thunderstorms between noon and 3pm, then patchy smoke and a chance of showers and thunderstorms. Mostly sunny. High near 79, with temperatures falling to around 73 in the afternoon. East northeast wind 6 to 12 mph, with gusts as high as 18 mph. Chance of precipitation is 30%. New rainfall amounts less than a tenth of an inch possible.
7-day forecast
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Today | 79°F | Patchy Smoke | 6 to 12 mph ENE | 25% |
| Tonight | 56°F | Patchy Smoke | 5 to 12 mph S | 15% |
| Wednesday | 85°F | Patchy Smoke then Sunny | 3 to 10 mph N | 1% |
| Wednesday Night | 60°F | Mostly Clear | 9 to 13 mph SSE | 7% |
| Thursday | 92°F | Sunny | 3 to 9 mph NNW | 1% |
| Thursday Night | 61°F | Clear | 6 to 10 mph S | 3% |
| Friday | 94°F | Sunny | 5 to 8 mph NNE | 0% |
| Friday Night | 65°F | Mostly Clear | 9 to 14 mph SSE | 1% |
| Saturday | 96°F | Sunny | 6 to 13 mph NW | 0% |
| Saturday Night | 65°F | Partly Cloudy | 8 to 14 mph SSE | 1% |
| Sunday | 96°F | Sunny | 3 to 8 mph NNE | 8% |
| Sunday Night | 66°F | Partly Cloudy | 8 to 12 mph SSW | 4% |
| Monday | 94°F | Sunny | 6 to 9 mph NW | 11% |
| Monday Night | 65°F | Partly Cloudy | 6 to 9 mph NW | 13% |
Forecast source: National Weather Service (api.weather.gov). Updated through the day.
Growing snapshot for Castle Pines, CO
Last spring frost
May 9
First fall frost
Oct 2
Growing season
143 days
Hardiness zone
5b
Explore more for Castle Pines, CO: full frost dates · planting calendar · Colorado frost dates
Climate data from the nearest NOAA station, Castle Rock, Co (3.7 mi). Frost dates are 1991–2020 averages, not a forecast. Page updated Aug 4, 2026.