Castle Pines, Colorado Weather
Thunderheads build by noon. Day 90 of spring. Read this microseason across nine climate regions →
Castle Pines weather forecast — hour by hour, 7-day outlook, NOAA radar
- TodayJun 17Overcast——90°66°—
- ThursdayJun 18Overcast——84°51°-6°
- FridayJun 19Light Drizzle——78°55°-6°
- SaturdayJun 20Overcast27%—90°52°+12°
- SundayJun 21Light Showers35%0.03″84°52°-6°
- MondayJun 22Thunderstorm67%0.13″75°52°-9°
- TuesdayJun 23Overcast38%—77°51°+2°
AQI 25 (Good), driven by Ozone. AQI down 5 over the last 6 hours (gradual decline). Ozone at AQI 46 now. With UV 7.8 peaking around 1 PM under clear skies, surface ozone likely climbs to AQI 48 around 1 PM.
OK No precautions needed for the general population; unusually sensitive individuals may consider limiting prolonged outdoor exertion during the projected peak around 10 PM.
What's driving it
Ozone × UV × Sky
Ozone at AQI 46 now. With UV 7.8 peaking around 1 PM under clear skies, surface ozone likely climbs to AQI 48 around 1 PM.
- Present
- AQI 46
- UV peak
- 7.8 at 1 PM
- Sky at peak
- clear
- Projected peak
- AQI 48
PM × Wind × Precip
PM2.5 at 5.2 µg/m³, PM10 at 7.1 µg/m³ — typical background levels with no transport signature.
- PM2.5/PM10
- 0.73
- Wind
- breezy
- Recent rain
- 0h in last 6h
- Pattern
- background
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
- 8:04 AM
- Moonset
- 10:37 PM
- In sign
- ♌︎ Leo
Thunderheads build by noon
Castle Pines at a glance
- Today vs. normal: 4°F above the seasonal normal for this latitude
- Last frost: April 13 (climatological average for this latitude)
- Microseason: Jun 16–20
- Planting window: Stake and prune tomato suckers. Watch for squash vine borers.
16-Day Forecast — Castle Pines
- Wed90°66°5%
- Thu84°51°5%
- Fri78°55°5%
- Sat90°52°27%
- Sun84°52°35%
- Mon75°52°67%
- Tue77°51°38%
- Wed89°53°21%
- Thu90°56°17%
- Fri83°58°21%
- Sat92°60°24%
- Sun62°51°44%
- Mon80°48°45%
- Tue86°54°36%
- Wed81°52°44%
- Thu93°57°45%
Forecast data from Open-Meteo (CC BY 4.0).
Right now in the garden
Warm-season window is open
As of June 17, 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.
ZIP codes in Castle Pines
- 80108