Grand Lake, CO Weather Forecast

Local 7-day forecast

67°

Chance Rain Showers

Track current conditions, temperature changes, wind, and the full daily outlook for Grand Lake, CO in one place.

Tuesday, September 15, 2026

Wind: 8 to 13 mph SW

Today

A chance of rain showers before noon, then a chance of showers and thunderstorms between noon and 3pm, then a chance of showers and thunderstorms. Partly sunny. High near 67, with temperatures falling to around 64 in the afternoon. Southwest wind 8 to 13 mph, with gusts as high as 23 mph. Chance of precipitation is 40%. New rainfall amounts less than a tenth of an inch possible.

Local 7-day forecast

Local Weather Overview

This forecast page for Grand Lake, CO is designed for quick trip planning, giving you a clean read on daytime highs, overnight lows, and changing conditions across the upcoming forecast window. Latest sync: Sep 15, 2026 1:31 PM MDT.

The active forecast window currently covers Sep 15 to Sep 21, 2026 for Grand Lake, CO.

Page Snapshot

Page focus: city weather
Forecast window: Sep 15 to Sep 21, 2026
Latest sync: Sep 15, 2026 1:31 PM MDT
Forecast office: BOU
Source: NOAA / NWS

Next High

67°F

Today

Next Low

40°F

Tonight

Rain Outlook

Periods mentioning precipitation

Windiest

8 to 13 mph

Today

Daily Outlook

Today

Sep 15

Chance Rain Showers

67 °F

/ 40°F

Wind 8 to 13 mph

Wed

Sep 16

Slight Chance Rain Showers then Slight Chance Showers And Thunderstorms

68 °F

/ 39°F

Wind 2 to 8 mph

Thu

Sep 17

Showers And Thunderstorms Likely

66 °F

/ 37°F

Wind 1 to 6 mph

Fri

Sep 18

Partly Sunny then Chance Showers And Thunderstorms

65 °F

/ 34°F

Wind 2 to 13 mph

Sat

Sep 19

Mostly Sunny then Chance Showers And Thunderstorms

63 °F

/ 32°F

Wind 1 to 10 mph

Sun

Sep 20

Mostly Sunny then Chance Showers And Thunderstorms

64 °F

/ 31°F

Wind 1 to 8 mph

Mon

Sep 21

Mostly Sunny then Chance Showers And Thunderstorms

65 °F

/ 32°F

Wind 1 to 8 mph

This Week in Grand Lake

Wednesday looks like the warmest upcoming period in Grand Lake at 68 degrees F.

Sunday Night is the coolest period ahead with temperatures near 31 degrees F.

The strongest winds are forecast for Today at about 8 to 13 mph SW.

Precipitation is mentioned in 13 upcoming forecast periods.

Forecast Details

Last updated: Sep 15, 2026 1:31 PM MDT
Coverage: 8 days
Time zone: America/Denver
Forecast office: BOU
Radar station: KFTG

Weather data is provided by the National Weather Service and refreshed automatically for U.S. locations.

Open NOAA source

Extended Forecast

Tonight

Sep 15

40°F

Chance Showers And Thunderstorms

3 to 8 mph S

A chance of showers and thunderstorms. Mostly cloudy. Low around 40, with temperatures rising to around 43 overnight. South wind 3 to 8 mph. Chance of precipitation is 40%. New rainfall amounts less than a tenth of an inch possible.

Wednesday

Sep 16

68°F

Slight Chance Rain Showers then Slight Chance Showers And Thunderstorms

2 to 8 mph SW

A slight chance of rain showers before noon, then a slight chance of showers and thunderstorms between noon and 3pm, then showers and thunderstorms likely. Mostly cloudy. High near 68, with temperatures falling to around 63 in the afternoon. Southwest wind 2 to 8 mph. Chance of precipitation is 60%.

Wednesday Night

Sep 16

39°F

Chance Showers And Thunderstorms

2 to 7 mph E

A chance of showers and thunderstorms. Mostly cloudy, with a low around 39. East wind 2 to 7 mph. Chance of precipitation is 40%.

Thursday

Sep 17

66°F

Showers And Thunderstorms Likely

1 to 6 mph WNW

A chance of rain showers before noon, then showers and thunderstorms likely. Mostly cloudy, with a high near 66. West northwest wind 1 to 6 mph. Chance of precipitation is 70%.

Thursday Night

Sep 17

37°F

Chance Showers And Thunderstorms then Mostly Cloudy

5 mph WSW

A chance of showers and thunderstorms before midnight. Mostly cloudy, with a low around 37. Chance of precipitation is 50%.

Friday

Sep 18

65°F

Partly Sunny then Chance Showers And Thunderstorms

2 to 13 mph WSW

A chance of showers and thunderstorms after noon. Partly sunny, with a high near 65.

Friday Night

Sep 18

34°F

Slight Chance Showers And Thunderstorms then Partly Cloudy

1 to 9 mph W

A slight chance of showers and thunderstorms before midnight. Partly cloudy, with a low around 34.

Saturday

Sep 19

63°F

Mostly Sunny then Chance Showers And Thunderstorms

1 to 10 mph WSW

A chance of showers and thunderstorms after noon. Mostly sunny, with a high near 63.

Saturday Night

Sep 19

32°F

Slight Chance Showers And Thunderstorms then Partly Cloudy

1 to 8 mph NE

A slight chance of showers and thunderstorms before midnight. Partly cloudy, with a low around 32.

Sunday

Sep 20

64°F

Mostly Sunny then Chance Showers And Thunderstorms

1 to 8 mph WSW

A chance of showers and thunderstorms after noon. Mostly sunny, with a high near 64.

Sunday Night

Sep 20

31°F

Partly Cloudy

1 to 7 mph NE

Partly cloudy, with a low around 31.

Monday

Sep 21

65°F

Mostly Sunny then Chance Showers And Thunderstorms

1 to 8 mph S

A chance of showers and thunderstorms after noon. Mostly sunny, with a high near 65.

Monday Night

Sep 21

32°F

Slight Chance Rain Showers then Partly Cloudy

2 to 7 mph ENE

A slight chance of rain showers before midnight. Partly cloudy, with a low around 32.

Detailed Forecast

Period	Conditions	Temp	Wind	Details
Today Sep 15	Chance Rain Showers	67°F	8 to 13 mph SW	A chance of rain showers before noon, then a chance of showers and thunderstorms between noon and 3pm, then a chance of...
Tonight Sep 15	Chance Showers And Thunderstorms	40°F	3 to 8 mph S	A chance of showers and thunderstorms. Mostly cloudy. Low around 40, with temperatures rising to around 43 overnight. So...
Wednesday Sep 16	Slight Chance Rain Showers then Slight Chance Showers And Thunderstorms	68°F	2 to 8 mph SW	A slight chance of rain showers before noon, then a slight chance of showers and thunderstorms between noon and 3pm, the...
Wednesday Night Sep 16	Chance Showers And Thunderstorms	39°F	2 to 7 mph E	A chance of showers and thunderstorms. Mostly cloudy, with a low around 39. East wind 2 to 7 mph. Chance of precipitatio...
Thursday Sep 17	Showers And Thunderstorms Likely	66°F	1 to 6 mph WNW	A chance of rain showers before noon, then showers and thunderstorms likely. Mostly cloudy, with a high near 66. West no...
Thursday Night Sep 17	Chance Showers And Thunderstorms then Mostly Cloudy	37°F	5 mph WSW	A chance of showers and thunderstorms before midnight. Mostly cloudy, with a low around 37. Chance of precipitation is 5...
Friday Sep 18	Partly Sunny then Chance Showers And Thunderstorms	65°F	2 to 13 mph WSW	A chance of showers and thunderstorms after noon. Partly sunny, with a high near 65.
Friday Night Sep 18	Slight Chance Showers And Thunderstorms then Partly Cloudy	34°F	1 to 9 mph W	A slight chance of showers and thunderstorms before midnight. Partly cloudy, with a low around 34.
Saturday Sep 19	Mostly Sunny then Chance Showers And Thunderstorms	63°F	1 to 10 mph WSW	A chance of showers and thunderstorms after noon. Mostly sunny, with a high near 63.
Saturday Night Sep 19	Slight Chance Showers And Thunderstorms then Partly Cloudy	32°F	1 to 8 mph NE	A slight chance of showers and thunderstorms before midnight. Partly cloudy, with a low around 32.
Sunday Sep 20	Mostly Sunny then Chance Showers And Thunderstorms	64°F	1 to 8 mph WSW	A chance of showers and thunderstorms after noon. Mostly sunny, with a high near 64.
Sunday Night Sep 20	Partly Cloudy	31°F	1 to 7 mph NE	Partly cloudy, with a low around 31.
Monday Sep 21	Mostly Sunny then Chance Showers And Thunderstorms	65°F	1 to 8 mph S	A chance of showers and thunderstorms after noon. Mostly sunny, with a high near 65.
Monday Night Sep 21	Slight Chance Rain Showers then Partly Cloudy	32°F	2 to 7 mph ENE	A slight chance of rain showers before midnight. Partly cloudy, with a low around 32.

Nearby Forecasts

Explore weather pages for nearby cities and major places around Grand Lake.

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Weather data provided by the National Weather Service (NOAA). Forecast pages update automatically as new periods are synced for each supported U.S. location.