Louisville, Colorado Weather
Paintbrush crowns the ridges. Day 88 of spring. Read this microseason across nine climate regions →
Louisville weather forecast — hour by hour, 7-day outlook, NOAA radar
- TodayJun 15Overcast——79°52°—
- TuesdayJun 16Overcast——92°56°+13°
- WednesdayJun 17Overcast——97°64°+5°
- ThursdayJun 18Clear——86°52°-11°
- FridayJun 19Overcast——95°53°+9°
- SaturdayJun 20Partly Cloudy37%—97°61°+2°
- SundayJun 21Light Drizzle40%—89°60°-8°
AQI 55 (Moderate), driven by Ozone. AQI flat over the last 6 hours (within ±3 points). Ozone at AQI 71 — peak already passed at 1 PM under clear skies. Levels should ease through evening.
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 71 — peak already passed at 1 PM under clear skies. Levels should ease through evening.
- Present
- AQI 71
- UV peak
- 2.0 at earlier today
- Sky at peak
- clear
- Projected peak
- AQI 71
PM × Wind × Precip
PM2.5 at 13.0 µg/m³ (AQI 58) with a 0.83 fine-to-coarse ratio and 4 mph wind — combustion smoke trapped in calm air, not road dust.
- PM2.5/PM10
- 0.83
- Wind
- calm
- 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
- 5:37 AM
- Moonset
- 8:50 PM
- In sign
- ♋︎ Cancer
Paintbrush crowns the ridges
Louisville at a glance
- Today vs. normal: 4°F above the seasonal normal for this latitude
- Last frost: April 16 (climatological average for this latitude)
- Microseason: Jun 11–15
- Planting window: Stake and prune tomato suckers. Watch for squash vine borers.
16-Day Forecast — Louisville
- Mon79°52°1%
- Tue92°56°1%
- Wed97°64°0%
- Thu86°52°1%
- Fri95°53°5%
- Sat97°61°37%
- Sun89°60°40%
- Mon85°57°40%
- Tue89°58°24%
- Wed91°55°23%
- Thu95°57°20%
- Fri100°62°15%
- Sat93°58°23%
- Sun79°50°42%
- Mon88°51°42%
- Tue102°58°39%
Forecast data from Open-Meteo (CC BY 4.0).
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.
ZIP codes in Louisville
- 80027