Grand Lake, Colorado Weather
Pikas hayfeeding in granite peaks. Day 78 of spring. Read this microseason across nine climate regions →
Grand Lake weather forecast — hour by hour, 7-day outlook, NOAA radar
- TodayJun 4Overcast14%—73°42°—
- FridayJun 5Overcast——75°47°+2°
- SaturdayJun 6Overcast19%—77°52°+2°
- SundayJun 7Overcast——74°47°-3°
- MondayJun 8Overcast15%—75°47°+1°
- TuesdayJun 9Overcast——80°46°+5°
- WednesdayJun 10Clear10%—74°51°-6°
AQI 57 (Moderate), driven by Ozone. AQI down 10 over the last 6 hours (steady decline since this morning). Ozone at AQI 40 now. With UV 0.0 peaking around 1 PM under clear skies, surface ozone likely climbs to AQI 10 by mid-afternoon.
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 40 now. With UV 0.0 peaking around 1 PM under clear skies, surface ozone likely climbs to AQI 10 by mid-afternoon.
- Present
- AQI 40
- UV peak
- 0.0 at 1 PM
- Sky at peak
- clear
- Projected peak
- AQI 10
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).
The higher the clouds, the finer the weather.
- Moonrise
- 6:05 AM
- Moonset
- 4:12 PM
- In sign
- ♒︎ Aquarius
Pikas hayfeeding in granite peaks
Grand Lake at a glance
- Today vs. normal: 19°F below the seasonal normal for this latitude
- Last frost: April 18 (climatological average for this latitude)
- Microseason: Jun 1–5
- Planting window: Harvest spring lettuce before it bolts. Sow heat-tolerant greens.
Right now in the garden
Warm-season window is open
As of June 5, 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 — Grand Lake
SPC has placed Grand Lake in the General Thunderstorms category for severe thunderstorms day after tomorrow.
- TODAYNONENo severe risk
- TOMORROWNONENo severe risk
- DAY 3TSTMGeneral Thunderstorms
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.