Castle Rock, Colorado Weather
Monsoon storms drench the south. Day 15 of summer. Read this microseason across nine climate regions →
Castle Rock weather forecast — hour by hour, 7-day outlook, NOAA radar
- TodayJul 4Overcast20%—81°58°—
- SundayJul 5Overcast——89°59°+8°
- MondayJul 6Overcast10%—92°62°+3°
- TuesdayJul 7Light Drizzle56%0.01″92°60°0°
- WednesdayJul 8Heavy Drizzle72%0.03″93°58°+1°
- ThursdayJul 9Overcast53%—95°56°+2°
- FridayJul 10Overcast26%—89°56°-6°
AQI 94 (Moderate), driven by PM2.5. AQI up 35 in the last 6 hours — air quality is degrading. PM2.5 at 9.3 µg/m³, PM10 at 10.6 µg/m³ — typical background levels with no transport signature.
OK No precautions needed for the general population; unusually sensitive individuals may consider limiting prolonged outdoor exertion.
What's driving it
Ozone × UV × Sky
Ozone at AQI 50 now. With UV 0.0 peaking around 1 PM under clear skies, surface ozone likely climbs to AQI 12 around 1 PM.
- Present
- AQI 50
- UV peak
- 0.0 at 1 PM
- Sky at peak
- clear
- Projected peak
- AQI 12
PM × Wind × Precip
PM2.5 at 9.3 µg/m³, PM10 at 10.6 µg/m³ — typical background levels with no transport signature.
- PM2.5/PM10
- 0.88
- Wind
- light
- 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).
If the first of July be rainy weather, 'twill rain more or less for four weeks together.
- Moonrise
- 11:18 PM
- Moonset
- 11:14 AM
- In sign
- ♓︎ Pisces
Monsoon storms drench the south
Castle Rock at a glance
- Today vs. normal: 3°F below the seasonal normal for this latitude
- Last frost: April 12 (climatological average for this latitude)
- Microseason: Jul 1–5
- Planting window: Harvest early potatoes. Begin drying onions on the surface.
ZIP codes: 80104, 80108, 80109
16-Day Forecast — Castle Rock
- Sat81°58°20%
- Sun89°59°4%
- Mon92°62°10%
- Tue92°60°56%
- Wed93°58°72%
- Thu95°56°53%
- Fri89°56°26%
- Sat92°53°4%
- Sun94°58°3%
- Mon103°57°7%
- Tue102°61°22%
- Wed106°65°31%
- Thu104°67°45%
- Fri103°64°45%
- Sat100°61°54%
- Sun93°59°55%
Forecast data from Open-Meteo (CC BY 4.0).
Live wind & temperature near Castle Rock
Right now in the garden
Peak growing season
As of July 5, the growing season is at its peak — frost is months away. Continue succession-planting beans and summer squash. Start fall brassicas (broccoli, cabbage, kale) from seed indoors for transplanting in late summer.
SPC Convective Outlook
Storm Prediction Center — Castle Rock
SPC has placed Castle Rock in the Marginal Risk category for severe thunderstorms today.
- TODAYMRGLMarginal Risk
- TOMORROWTSTMGeneral Thunderstorms
- DAY 3TSTMGeneral Thunderstorms
Isolated severe storms possible. Limited threat for hail or damaging wind.
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