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Current weather in Grand Lake is clear sky.

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This page shows hourly weather forecast for Grand Lake, including temperature, wind, precipitation, humidity and cloud cover.

Is the weather forecast for Grand Lake updated regularly?

Weather data for Grand Lake is updated regularly with the latest available observations and forecasts.

Now · 9:54 AM

Grand Lake Weather & Hourly Forecast

United States · Colorado · 80447

56°F

Sunny

Feels like: 49°F

💧 Humidity 52% 🌡 Pressure 30.12 inHg 💨 Wind 8 mph 👁 Visibility 33.1 mi ☁ Clouds 4% ☀️ UV index 1.5 · Low 🌅 Sunrise — 🌇 Sunset —

Hourly Forecast for Grand Lake

Today

10:00 AM

Sunny

56° 💧 0.007 in 💨 8 mph H 52%30.12 inHg

1:00 PM

Mostly sunny

61° 💧 0.005 in 💨 10 mph H 39%30.09 inHg

4:00 PM

Mostly cloudy

63° 💧 0.004 in 💨 12 mph H 32%29.97 inHg

7:00 PM

Partly cloudy

55° 💧 0.018 in 💨 4 mph H 51%30.03 inHg

10:00 PM

Light rain

47° 💧 0.009 in 💨 3 mph H 93%30.15 inHg

Tomorrow

1:00 AM

Mostly cloudy night

47° 💧 None 💨 1 mph H 85%30.15 inHg

4:00 AM

Overcast night

47° 💧 None 💨 1 mph H 80%30.15 inHg

7:00 AM

Overcast

46° 💧 None 💨 1 mph H 79%30.21 inHg

10:00 AM

Overcast

55° 💧 None 💨 3 mph H 62%30.24 inHg

1:00 PM

Strong thunderstorm

62° 💧 0.006 in 💨 7 mph H 43%30.15 inHg

4:00 PM

Light thunderstorms

54° 💧 0.079 in 💨 8 mph H 78%30.18 inHg

7:00 PM

Overcast

53° 💧 0.000 in 💨 1 mph H 75%30.21 inHg

10:00 PM

Overcast night

48° 💧 0.000 in 💨 3 mph H 93%30.24 inHg

Thursday

1:00 AM

Overcast night

47° 💧 0.000 in 💨 4 mph H 91%30.24 inHg

4:00 AM

Light rain

47° 💧 0.037 in 💨 1 mph H 93%30.24 inHg

7:00 AM

Overcast

47° 💧 0.000 in 💨 1 mph H 96%30.21 inHg

Today

10:00 AM

Sunny

56° 💧 0.000 in 💨 8 mph H 52%30.12 inHg

11:00 AM

Mostly sunny

58° 💧 0.001 in 💨 8 mph H 50%30.12 inHg

12:00 PM

Light rain

58° 💧 0.005 in 💨 9 mph H 47%30.09 inHg

1:00 PM

Mostly sunny

61° 💧 0.003 in 💨 10 mph H 39%30.09 inHg

2:00 PM

Mostly sunny

63° 💧 0.001 in 💨 10 mph H 36%30.03 inHg

3:00 PM

Mostly cloudy

64° 💧 0.000 in 💨 12 mph H 31%30.00 inHg

4:00 PM

Mostly cloudy

63° 💧 0.001 in 💨 12 mph H 32%29.97 inHg

5:00 PM

Partly cloudy

62° 💧 0.001 in 💨 10 mph H 33%29.97 inHg

6:00 PM

Mostly cloudy

60° 💧 0.003 in 💨 9 mph H 36%30.00 inHg

7:00 PM

Partly cloudy

55° 💧 0.002 in 💨 4 mph H 51%30.03 inHg

8:00 PM

Partly cloudy night

50° 💧 0.003 in 💨 4 mph H 75%30.12 inHg

9:00 PM

Light rain

48° 💧 0.013 in 💨 2 mph H 88%30.15 inHg

10:00 PM

Light rain

47° 💧 0.008 in 💨 3 mph H 93%30.15 inHg

11:00 PM

Partly cloudy night

45° 💧 0.001 in 💨 2 mph H 95%30.15 inHg

Tomorrow

12:00 AM

Mostly cloudy night

45° 💧 None 💨 2 mph H 93%30.15 inHg

1:00 AM

Mostly cloudy night

47° 💧 None 💨 1 mph H 85%30.15 inHg

2:00 AM

Mostly cloudy night

47° 💧 None 💨 1 mph H 80%30.15 inHg

3:00 AM

Overcast night

46° 💧 None 💨 1 mph H 81%30.15 inHg

4:00 AM

Overcast night

47° 💧 None 💨 1 mph H 80%30.15 inHg

5:00 AM

Overcast night

46° 💧 None 💨 1 mph H 80%30.18 inHg

6:00 AM

Overcast night

46° 💧 None 💨 1 mph H 80%30.18 inHg

7:00 AM

Overcast

46° 💧 None 💨 1 mph H 79%30.21 inHg

8:00 AM

Mostly cloudy

48° 💧 None 💨 1 mph H 83%30.24 inHg

9:00 AM

Mostly cloudy

50° 💧 None 💨 2 mph H 82%30.24 inHg

10:00 AM

Overcast

55° 💧 None 💨 3 mph H 62%30.24 inHg

11:00 AM

Overcast

57° 💧 None 💨 4 mph H 56%30.21 inHg

12:00 PM

Overcast

60° 💧 None 💨 6 mph H 49%30.18 inHg

1:00 PM

Strong thunderstorm

62° 💧 0.000 in 💨 7 mph H 43%30.15 inHg

2:00 PM

Mostly cloudy

64° 💧 0.001 in 💨 8 mph H 38%30.12 inHg

3:00 PM

Light rain

64° 💧 0.004 in 💨 10 mph H 39%30.09 inHg

4:00 PM

Light thunderstorms

54° 💧 0.061 in 💨 8 mph H 78%30.18 inHg

5:00 PM

Light rain

54° 💧 0.015 in 💨 2 mph H 72%30.21 inHg

6:00 PM

Overcast

56° 💧 0.002 in 💨 2 mph H 64%30.18 inHg

7:00 PM

Overcast

53° 💧 0.000 in 💨 1 mph H 75%30.21 inHg

8:00 PM

Overcast night

50° 💧 None 💨 2 mph H 86%30.21 inHg

9:00 PM

Overcast night

49° 💧 None 💨 2 mph H 92%30.24 inHg

10:00 PM

Overcast night

48° 💧 None 💨 3 mph H 93%30.24 inHg

11:00 PM

Overcast night

47° 💧 0.000 in 💨 3 mph H 93%30.24 inHg

Thursday

12:00 AM

Overcast night

47° 💧 None 💨 4 mph H 91%30.24 inHg

1:00 AM

Overcast night

47° 💧 0.000 in 💨 4 mph H 91%30.24 inHg

2:00 AM

Overcast night

48° 💧 None 💨 3 mph H 89%30.21 inHg

3:00 AM

Overcast night

47° 💧 0.000 in 💨 2 mph H 89%30.21 inHg

4:00 AM

Light rain

47° 💧 0.005 in 💨 1 mph H 93%30.24 inHg

5:00 AM

Light rain

47° 💧 0.023 in 💨 1 mph H 96%30.24 inHg

6:00 AM

Light rain

47° 💧 0.010 in 💨 3 mph H 97%30.21 inHg

7:00 AM

Overcast

47° 💧 None 💨 1 mph H 96%30.21 inHg

8:00 AM

Overcast

49° 💧 None 💨 2 mph H 96%30.24 inHg

9:00 AM

Overcast

51° 💧 0.000 in 💨 1 mph H 87%30.24 inHg

10:00 AM

Light rain

52° 💧 0.010 in 💨 3 mph H 82%30.24 inHg

11:00 AM

Light rain

51° 💧 0.012 in 💨 3 mph H 89%30.27 inHg

12:00 PM

Light rain

50° 💧 0.009 in 💨 3 mph H 90%30.27 inHg

1:00 PM

Light rain

51° 💧 0.012 in 💨 4 mph H 82%30.24 inHg

2:00 PM

Light rain

51° 💧 0.021 in 💨 4 mph H 86%30.24 inHg

3:00 PM

Light rain

54° 💧 0.008 in 💨 4 mph H 72%30.21 inHg

4:00 PM

Light rain

56° 💧 0.005 in 💨 7 mph H 62%30.18 inHg

5:00 PM

Mostly cloudy

56° 💧 0.001 in 💨 6 mph H 61%30.18 inHg

6:00 PM

Mostly cloudy

56° 💧 None 💨 5 mph H 62%30.15 inHg

Friday

3:00 AM

Mostly clear night

43° 💧 None 💨 2 mph H 95%30.24 inHg

6:00 AM

Mostly cloudy night

41° 💧 None 💨 1 mph H 100%30.24 inHg

9:00 AM

Mostly cloudy

49° 💧 None 💨 3 mph H 84%30.27 inHg

12:00 PM

Overcast

55° 💧 None 💨 5 mph H 63%30.21 inHg

3:00 PM

Light rain

56° 💧 None 💨 4 mph H 54%30.12 inHg

6:00 PM

Light rain

50° 💧 None 💨 2 mph H 82%30.18 inHg

9:00 PM

Partly cloudy night

43° 💧 None 💨 0 mph H 97%30.21 inHg

Saturday

12:00 AM

Overcast night

39° 💧 None 💨 1 mph H 100%30.18 inHg

3:00 AM

Overcast night

38° 💧 None 💨 1 mph H 100%30.15 inHg

6:00 AM

Partly cloudy night

37° 💧 None 💨 1 mph H 100%30.18 inHg

9:00 AM

Partly cloudy

45° 💧 None 💨 3 mph H 88%30.21 inHg

12:00 PM

Sunny

54° 💧 None 💨 8 mph H 52%30.12 inHg

3:00 PM

Mostly sunny

58° 💧 None 💨 11 mph H 37%30.00 inHg

6:00 PM

Mostly sunny

55° 💧 None 💨 10 mph H 37%30.00 inHg

9:00 PM

Mostly clear night

42° 💧 None 💨 1 mph H 81%30.12 inHg

Sunday

12:00 AM

Clear night

39° 💧 None 💨 1 mph H 93%30.18 inHg

3:00 AM

Partly cloudy night

38° 💧 None 💨 1 mph H 93%30.15 inHg

6:00 AM

Partly cloudy night

36° 💧 None 💨 2 mph H 98%30.18 inHg

9:00 AM

Mostly sunny

43° 💧 None 💨 4 mph H 80%30.21 inHg

12:00 PM

Mostly sunny

51° 💧 None 💨 10 mph H 46%30.15 inHg

3:00 PM

Light rain

54° 💧 None 💨 10 mph H 37%30.06 inHg

6:00 PM

Mostly sunny

51° 💧 None 💨 8 mph H 32%30.06 inHg

9:00 PM

Clear night

41° 💧 None 💨 1 mph H 65%30.18 inHg

Monday

12:00 AM

Clear night

37° 💧 None 💨 0 mph H 78%30.21 inHg

6:00 AM

Mostly clear night

38° 💧 None 💨 2 mph H 91%30.24 inHg

12:00 PM

Sunny

36° 💧 None 💨 0 mph H 90%30.24 inHg

6:00 PM

Mostly sunny

53° 💧 None 💨 5 mph H 35%30.15 inHg

Tuesday

12:00 AM

Clear night

51° 💧 None 💨 2 mph H 39%30.09 inHg

6:00 AM

Clear night

36° 💧 None 💨 3 mph H 97%30.21 inHg

12:00 PM

Sunny

36° 💧 None 💨 1 mph H 91%30.09 inHg

6:00 PM

Mostly sunny

56° 💧 None 💨 5 mph H 37%30.03 inHg

Wednesday

12:00 AM

Mostly cloudy night

48° 💧 None 💨 2 mph H 69%30.03 inHg

6:00 AM

Mostly clear night

39° 💧 None 💨 0 mph H 98%30.03 inHg

12:00 PM

Sunny

38° 💧 None 💨 2 mph H 89%30.06 inHg

6:00 PM

Mostly sunny

52° 💧 None 💨 10 mph H 51%30.06 inHg

Thursday

12:00 AM

Clear night

52° 💧 None 💨 6 mph H 45%29.97 inHg

6:00 AM

Clear night

40° 💧 None 💨 0 mph H 85%30.06 inHg

12:00 PM

Sunny

39° 💧 None 💨 1 mph H 82%30.06 inHg

6:00 PM

Sunny

56° 💧 None 💨 6 mph H 37%30.03 inHg

Friday

12:00 AM

Mostly clear night

54° 💧 None 💨 2 mph H 44%29.94 inHg

6:00 AM

Mostly cloudy night

37° 💧 None 💨 1 mph H 99%29.97 inHg

12:00 PM

Sunny

39° 💧 None 💨 7 mph H 80%30.00 inHg

6:00 PM

Mostly sunny

51° 💧 None 💨 14 mph H 45%29.97 inHg

Saturday

12:00 AM

Partly cloudy night

52° 💧 None 💨 9 mph H 37%29.94 inHg

6:00 AM

Clear night

41° 💧 None 💨 0 mph H 66%30.00 inHg

12:00 PM

Partly cloudy

38° 💧 None 💨 1 mph H 57%30.03 inHg

6:00 PM

Partly cloudy

57° 💧 None 💨 6 mph H 23%29.94 inHg

Sunday

12:00 AM

Mostly cloudy night

55° 💧 None 💨 3 mph H 31%29.85 inHg

6:00 AM

Partly cloudy night

44° 💧 None 💨 1 mph H 54%29.94 inHg

12:00 PM

Mostly sunny

40° 💧 None 💨 2 mph H 64%29.94 inHg

6:00 PM

Mostly cloudy

53° 💧 None 💨 7 mph H 36%29.94 inHg

Monday

12:00 AM

Mostly cloudy night

51° 💧 None 💨 6 mph H 37%29.88 inHg

6:00 AM

Light rain

41° 💧 None 💨 1 mph H 85%29.97 inHg

12:00 PM

Light rain

34° 💧 None 💨 3 mph H 100%30.00 inHg

6:00 PM

Rain and snow

34° 💧 None 💨 3 mph H 95%30.09 inHg

Tuesday

12:00 AM

Partly cloudy night

36° 💧 None 💨 6 mph H 67%30.09 inHg

6:00 AM

Mostly cloudy night

30° 💧 None 💨 2 mph H 97%30.27 inHg

12:00 PM

Overcast

28° 💧 None 💨 1 mph H 97%30.33 inHg

6:00 PM

Sunny

43° 💧 None 💨 2 mph H 48%30.27 inHg

Wednesday

12:00 AM

Clear night

45° 💧 None 💨 1 mph H 36%30.24 inHg

In Grand Lake and, more broadly, across the state of Colorado: The morning will start with a mix of sun and clouds, bringing mild temperatures ranging from 51 to 65 degrees Fahrenheit. Light south winds at around 9 mph with gusts up to 14 mph will provide a gentle breeze. As the day progresses, there is a high chance of rain, with total accumulation expected to be around 0.14 inches. The rain may arrive at any point during the afternoon, so it’s a good idea to carry an umbrella if you plan to be outdoors. Temperatures are expected to remain mild throughout the day, making for comfortable conditions despite the possibility of rain. Overall, be prepared for a damp afternoon with variable skies.

15-Day Weather Outlook for Grand Lake

TomorrowTomorrow

Strong thunderstorm 64°/45° 💧 None 💨 10 mph

Thursday, Sep 17Thu Sep 17

Overcast 56°/47° 💧 None 💨 7 mph

Friday, Sep 18Fri Sep 18

Light rain 56°/41° 💧 0.384 in 💨 5 mph

Saturday, Sep 19Sat Sep 19

Mostly sunny 58°/37° 💧 0.004 in 💨 11 mph

Sunday, Sep 20Sun Sep 20

Light rain 54°/36° 💧 0.023 in 💨 10 mph

Monday, Sep 21Mon Sep 21

Mostly sunny 53°/36° 💧 0.210 in 💨 5 mph

Tuesday, Sep 22Tue Sep 22

Mostly sunny 56°/36° 💧 0.008 in 💨 5 mph

Wednesday, Sep 23Wed Sep 23

Mostly cloudy 52°/38° 💧 0.042 in 💨 10 mph

Thursday, Sep 24Thu Sep 24

Sunny 56°/39° 💧 0.010 in 💨 6 mph

Friday, Sep 25Fri Sep 25

Mostly sunny 54°/37° 💧 0.034 in 💨 14 mph

Saturday, Sep 26Sat Sep 26

Partly cloudy 57°/38° 💧 None 💨 9 mph

Sunday, Sep 27Sun Sep 27

Mostly cloudy 55°/40° 💧 0.007 in 💨 7 mph

Monday, Sep 28Mon Sep 28

Rain and snow 51°/34° 💧 0.722 in 💨 6 mph

Tuesday, Sep 29Tue Sep 29

Mostly cloudy 43°/28° 💧 0.039 in 💨 6 mph

Wednesday, Sep 30Wed Sep 30

Sunny 45°/45° 💧 None 💨 1 mph

TEMPERATURE OUTLOOK

Temperature & Weather Trends in Grand Lake

Vertical axis: °F · Color based on temperature

AIR QUALITY FORECAST

Air Quality Forecast for Grand Lake

Hourly forecast · Updated every 2 hours

Good

Nearest forecast value 10:00 AM

PM2.5 Fine particles Good 0,8µg/m³

Microscopic particles that can penetrate deep into the lungs. Elevated concentrations can especially affect children, older adults and people with respiratory conditions.

PM10 Particulate matter Good 1,7µg/m³

Includes dust, pollen and other airborne particles. High concentrations may irritate the respiratory system.

O₃ Ozone Good 46,0µg/m³

Ground-level ozone can irritate the eyes and respiratory system when concentrations are elevated.

NO₂ Nitrogen dioxide Good 0,7µg/m³

A gas emitted mainly by traffic and some industrial activity. High exposure can affect respiratory health.

Air quality is favorable for outdoor activities.

UV & HEALTH

UV, Sun & Health Outlook in Grand Lake

Maximum daily UV Today, tomorrow and the following day show the maximum UV index forecast for each day.

0–2 Low 3–5 Moderate 6–7 High 8–10 Very high 11+ Extreme

Today UV 7,3High 😊Good

Tomorrow UV 7,3High 😊Good

Thursday UV 3,0Moderate 😊Good

Friday UV 6,0High 😊Good

Saturday UV 4,0Moderate 😊Good

Sunday UV 5,0Moderate —Unavailable

Monday UV 5,0Moderate —Unavailable

Hourly UV index today

10:00 AMUV 3,4 11:00 AMUV 5,6 12:00 PMUV 7,3 1:00 PMUV 5,7 2:00 PMUV 4,9 3:00 PMUV 2,5 4:00 PMUV 2,1 5:00 PMUV 1,0 6:00 PMUV 0,3 7:00 PMUV 0,0

Today's weather health advice Open today's recommendations.

Strong UV exposure

Protect exposed skin with SPF 30+ sunscreen, wear sunglasses, and try to limit direct midday sun.

Good air quality

Air quality is good and outdoor activities can be enjoyed normally.

Comfortable temperature conditions

Temperatures should feel comfortable for most people, with no particular heat or cold precautions needed.

Good conditions for outdoor activities

Outdoor activities can generally be enjoyed normally, with sun protection adjusted to the UV level.

WIND OUTLOOK

Hourly Wind Forecast for Grand Lake

Vertical axis: mph · Horizontal axis: hours

Sustained wind Max gusts

NIGHT SKY · GRAND LAKE, COLORADO

Tonight's Stargazing & Shooting Stars

Fair observing conditions. Best local viewing window: 10:00 PM–11:00 PM.

60/100Best-hour score

BEST TIME TONIGHT 10:00 PM–11:00 PM Astronomical darkness: 8:44 PM–5:13 AM

☁ Cloud cover 36% Real hourly forecast for the best viewing hour.

☾ Moonlight 20% Waxing Crescent · Moon below the horizon at the best viewing hour.

☄ Meteor activity September ε-Perseids Reference ZHR 8 · Radiant 19° high at the best hour.

✦ Estimated visible meteors 0–1/hour Local estimate after weather, moonlight and radiant-height adjustments.

Chance ≥1 meteor in 30 min28%

UPCOMING METEOR PERIODSStart, peak and end dates · weather should be checked closer to the peak.

SEP 5–SEP 21

September ε-PerseidsStart SEP 5 · Peak SEP 9 · End SEP 21 · ZHR 8 · 6% Moon at peak

ACTIVE NOW

SEP 20–NOV 20

Southern TauridsStart SEP 20 · Peak NOV 5 · End NOV 20 · ZHR 7 · 20% Moon at peak

UPCOMING

OCT 2–NOV 7

OrionidsStart OCT 2 · Peak OCT 21 · End NOV 7 · ZHR 20 · 77% Moon at peak

UPCOMING

OCT 20–DEC 10

Northern TauridsStart OCT 20 · Peak NOV 12 · End DEC 10 · ZHR 5 · 7% Moon at peak

UPCOMING

Experimental local observing estimate. Weather values come from the hourly forecast already used on this page. Moon position and astronomical darkness are calculated locally from time and coordinates. Meteor-shower ZHR describes ideal conditions and is not the number of meteors a person should expect to see locally.

DISCOVER WEATHER NEARBY Weather in other cities

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Forecast data for Grand Lake were last refreshed today at 9:54 AM. The current forecast period extends through 17/09/2026 at 7:00 AM. Weather, air-quality and UV-index data are provided through WEATHER-INFO.COM. Forecasts are produced automatically from the latest available data and are subject to periodic technical checks. This service is intended for general weather information.