Castle Rock, Colorado Weather
Paintbrush crowns the ridges. Day 88 of spring. Read this microseason across nine climate regions →
Castle Rock weather forecast — hour by hour, 7-day outlook, NOAA radar
- TodayJun 15Overcast——77°46°—
- TuesdayJun 16Overcast——84°50°+7°
- WednesdayJun 17Overcast——93°56°+9°
- ThursdayJun 18Clear——80°48°-13°
- FridayJun 19Overcast12%—91°50°+11°
- SaturdayJun 20Light Drizzle50%0.01″92°58°+1°
- SundayJun 21Light Drizzle52%—87°53°-5°
AQI 36 (Good), driven by PM2.5. AQI down 6 over the last 6 hours (gradual decline). PM2.5 at 16.9 µg/m³ (AQI 66) with a 0.88 fine-to-coarse ratio and 5 mph wind — combustion smoke trapped in calm air, not road dust.
OK No precautions needed for the general population; unusually sensitive individuals may consider limiting prolonged outdoor exertion.
What's driving it
PM × Wind × Precip
PM2.5 at 16.9 µg/m³ (AQI 66) with a 0.88 fine-to-coarse ratio and 5 mph wind — combustion smoke trapped in calm air, not road dust.
- PM2.5/PM10
- 0.88
- Wind
- light
- Recent rain
- 0h in last 6h
- Pattern
- stagnant smoke
Trends
Seven days of AQI and PM2.5.
Hourly air-quality data from the Copernicus Atmosphere Monitoring Service, charted across the past and next several days. Dashed lines mark the AQI breakpoints at 50 (Good → Moderate) and 100 (Moderate → Unhealthy for Sensitive Groups).
A summer fog for fair, a winter fog for rain.
- Moonrise
- 5:38 AM
- Moonset
- 8:46 PM
- In sign
- ♊︎ Gemini
Paintbrush crowns the ridges
Castle Rock at a glance
- Today vs. normal: 28°F below the seasonal normal for this latitude
- Last frost: April 12 (climatological average for this latitude)
- Microseason: Jun 11–15
- Planting window: Stake and prune tomato suckers. Watch for squash vine borers.
15-Day Forecast — Castle Rock
- Mon77°46°7%
- Tue84°50°3%
- Wed93°56°1%
- Thu80°48°1%
- Fri91°50°12%
- Sat92°58°50%
- Sun87°53°52%
- Mon85°51°50%
- Tue88°55°28%
- Wed95°58°20%
- Thu96°62°17%
- Fri91°61°27%
- Sat91°59°39%
- Sun75°61°46%
- Mon81°57°48%
Forecast data from Open-Meteo (CC BY 4.0).
Live wind & temperature near Castle Rock
Right now in the garden
Warm-season window is open
As of June 15, the last spring frost has passed for most years. Transplant tomatoes, peppers, eggplants, basil, and cucurbits (cucumbers, squash, melons) now. Direct-sow beans and corn into warm soil.
SPC Convective Outlook
Storm Prediction Center — Castle Rock
SPC has placed Castle Rock in the General Thunderstorms category for severe thunderstorms today.
- TODAYTSTMGeneral Thunderstorms
- TOMORROWNONENo severe risk
- DAY 3NONENo severe risk
Thunderstorms possible. Not severe, but capable of producing lightning and brief heavy rain.
Source: NOAA / NWS Storm Prediction Center categorical convective outlook. Outlooks are re-issued multiple times per day; this page reflects the most recent SPC polygons covering the city’s coordinates.
ZIP codes in Castle Rock
- 80104
- 80108
- 80109