Silverthorne, Colorado Weather
Paintbrush crowns the ridges. Day 88 of spring. Read this microseason across nine climate regions →
Silverthorne weather forecast — hour by hour, 7-day outlook, NOAA radar
- TodayJun 15Foggy——72°44°—
- TuesdayJun 16Overcast——75°47°+3°
- WednesdayJun 17Clear——78°45°+3°
- ThursdayJun 18Clear——77°41°-1°
- FridayJun 19Overcast——80°43°+3°
- SaturdayJun 20Overcast28%—77°48°-3°
- SundayJun 21Overcast11%—77°43°0°
AQI 32 (Good), driven by Ozone. AQI flat over the last 6 hours (within ±3 points). Ozone at AQI 47 now. With UV 6.8 peaking around 1 PM under clear skies, surface ozone likely climbs to AQI 43 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 9 PM.
What's driving it
Ozone × UV × Sky
Ozone at AQI 47 now. With UV 6.8 peaking around 1 PM under clear skies, surface ozone likely climbs to AQI 43 around 1 PM.
- Present
- AQI 47
- UV peak
- 6.8 at 1 PM
- Sky at peak
- clear
- Projected peak
- AQI 43
PM × Wind × Precip
PM2.5 at 5.2 µg/m³ (AQI 29), ratio 0.66 with 8 mph wind — characteristic of long-range haze transport rather than a local source.
- PM2.5/PM10
- 0.66
- Wind
- light
- Recent rain
- 0h in last 6h
- Pattern
- transport
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
- 5:42 AM
- Moonset
- 8:53 PM
- In sign
- ♋︎ Cancer
Paintbrush crowns the ridges
Silverthorne at a glance
- Today vs. normal: 18°F below the seasonal normal for this latitude
- Last frost: April 14 (climatological average for this latitude)
- Microseason: Jun 11–15
- Planting window: Stake and prune tomato suckers. Watch for squash vine borers.
16-Day Forecast — Silverthorne
- Mon72°44°5%
- Tue75°47°1%
- Wed78°45°0%
- Thu77°41°0%
- Fri80°43°3%
- Sat77°48°28%
- Sun77°43°11%
- Mon74°41°22%
- Tue79°44°11%
- Wed81°47°7%
- Thu81°47°8%
- Fri74°47°18%
- Sat69°44°35%
- Sun70°39°40%
- Mon78°45°39%
- Tue80°47°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 Silverthorne
- 80498