Castle Pines, CO Weather & Growing Conditions
This Afternoon
81°F
Chance Showers And Thunderstorms
A chance of showers and thunderstorms before 3pm, then showers and thunderstorms likely. Mostly cloudy. High near 81, with temperatures falling to around 70 in the afternoon. East northeast wind around 7 mph. Chance of precipitation is 70%. New rainfall amounts between a tenth and quarter of an inch possible.
7-day forecast
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| This Afternoon | 81°F | Chance Showers And Thunderstorms | 7 mph ENE | 65% |
| Tonight | 52°F | Chance Showers And Thunderstorms then Partly Cloudy | 3 to 8 mph WSW | 40% |
| Saturday | 75°F | Mostly Sunny then Chance Showers And Thunderstorms | 2 to 8 mph ENE | 57% |
| Saturday Night | 50°F | Chance Showers And Thunderstorms then Partly Cloudy | 2 to 6 mph SE | 47% |
| Sunday | 69°F | Showers And Thunderstorms Likely | 3 to 8 mph SE | 57% |
| Sunday Night | 48°F | Chance Showers And Thunderstorms then Partly Cloudy | 2 to 7 mph ESE | 37% |
| Monday | 71°F | Sunny | 3 to 8 mph SE | 5% |
| Monday Night | 51°F | Slight Chance Showers And Thunderstorms then Partly Cloudy | 8 to 12 mph SSE | 15% |
| Tuesday | 75°F | Mostly Sunny then Slight Chance Showers And Thunderstorms | 3 to 10 mph ESE | 21% |
| Tuesday Night | 53°F | Slight Chance Showers And Thunderstorms then Partly Cloudy | 7 to 12 mph S | 18% |
| Wednesday | 75°F | Partly Sunny then Slight Chance Showers And Thunderstorms | 3 to 7 mph SE | 22% |
| Wednesday Night | 52°F | Slight Chance Showers And Thunderstorms then Mostly Cloudy | 6 mph SSW | 17% |
| Thursday | 75°F | Partly Sunny then Slight Chance Showers And Thunderstorms | 3 to 7 mph N | 16% |
| Thursday Night | 53°F | Slight Chance Rain Showers then Mostly Cloudy | 8 mph S | 22% |
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 Sep 18, 2026.