Grand Lake, Colorado Weather
Pikas hayfeeding in granite peaks. Day 77 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°48°+2°
- SaturdayJun 6Light Drizzle21%0.01″79°52°+4°
- SundayJun 7Overcast——74°46°-5°
- MondayJun 8Partly Cloudy16%—76°47°+2°
- TuesdayJun 9Overcast——79°48°+3°
- WednesdayJun 10Drizzle—0.08″83°50°+4°
Ozone at AQI 83 — peak already passed at 1 PM under overcast skies. AQI up 25 in the last 6 hours — air quality is degrading. 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 83 — peak already passed at 1 PM under overcast skies. Levels should ease through evening.
- Present
- AQI 83
- UV peak
- 2.1 at earlier today
- Sky at peak
- overcast
- Projected peak
- AQI 83
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
- 5:35 AM
- Moonset
- 3:07 PM
- In sign
- ♒︎ Aquarius
Pikas hayfeeding in granite peaks
Grand Lake at a glance
- Today vs. normal: 4°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 4, 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 today.
- TODAYTSTMGeneral Thunderstorms
- 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.