Grand County, CO Weather Forecast

County weather hub

35°
F

Clear

Compare major city weather across Grand County, scan the latest forecast snapshots, and jump into local 7-day outlook pages from one hub.

Tuesday, May 12, 2026
Wind: 5 mph SSW
Overnight

Clear. Low around 35, with temperatures rising to around 37 overnight. South southwest wind around 5 mph.

County weather hub

County Weather Overview

This county weather page brings together forecast coverage for Grand County so visitors can compare temperatures, wind, and conditions across the region without hopping between unrelated pages.

Current forecast coverage spans 0 of 0 mapped cities in Grand County.

Page Snapshot

Page focus
county weather
Forecast window
May 12 to May 18, 2026
Latest sync
May 12, 2026 5:09 AM MDT
Forecast office
BOU
Source
NOAA / NWS
Next High
72°F
Tuesday
Next Low
35°F
Overnight
Rain Outlook
3
Periods mentioning precipitation
Windiest
7 to 29 mph
Thursday

Daily Outlook

Today
May 12
Sunny
72 °F
/ 35°F
Wind 2 to 17 mph
Wed
May 13
Sunny
77 °F
/ 41°F
Wind 1 to 18 mph
Thu
May 14
Sunny
68 °F
/ 32°F
Wind 7 to 29 mph
Fri
May 15
Sunny
73 °F
/ 35°F
Wind 2 to 20 mph
Sat
May 16
Sunny
74 °F
/ 36°F
Wind 1 to 26 mph
Sun
May 17
Mostly Sunny then Slight Chance Showers And Thunderstorms
67 °F
/ 31°F
Wind 2 to 25 mph
Mon
May 18
Slight Chance Snow Showers then Chance Showers And Thunderstorms
63 °F
Wind 5 to 18 mph

This Week in Grand County

Wednesday looks like the warmest upcoming period in Grand County at 77 degrees F.

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

The strongest winds are forecast for Thursday at about 7 to 29 mph W.

Precipitation is mentioned in 3 upcoming forecast periods.

Forecast Details

Last updated
May 12, 2026 5:09 AM MDT
Coverage
7 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

Tuesday
May 12
72°F
Sunny
2 to 17 mph SW

Sunny, with a high near 72. Southwest wind 2 to 17 mph, with gusts as high as 28 mph.

Tuesday Night
May 12
36°F
Mostly Clear
5 to 13 mph SE

Mostly clear. Low around 36, with temperatures rising to around 38 overnight. Southeast wind 5 to 13 mph, with gusts as high as 21 mph.

Wednesday
May 13
77°F
Sunny
1 to 18 mph S

Sunny, with a high near 77. South wind 1 to 18 mph, with gusts as high as 28 mph.

Wednesday Night
May 13
41°F
Partly Cloudy
6 to 20 mph SW

Partly cloudy, with a low around 41. Southwest wind 6 to 20 mph, with gusts as high as 28 mph.

Thursday
May 14
68°F
Sunny
7 to 29 mph W

Sunny, with a high near 68.

Thursday Night
May 14
32°F
Mostly Clear
2 to 28 mph WSW

Mostly clear, with a low around 32.

Friday
May 15
73°F
Sunny
2 to 20 mph WSW

Sunny, with a high near 73.

Friday Night
May 15
35°F
Mostly Clear
3 to 18 mph N

Mostly clear, with a low around 35.

Saturday
May 16
74°F
Sunny
1 to 26 mph SSW

Sunny, with a high near 74.

Saturday Night
May 16
36°F
Partly Cloudy
1 to 25 mph SW

Partly cloudy, with a low around 36.

Sunday
May 17
67°F
Mostly Sunny then Slight Chance Showers And Thunderstorms
2 to 25 mph SW

A slight chance of showers and thunderstorms after noon. Mostly sunny, with a high near 67.

Sunday Night
May 17
31°F
Slight Chance Showers And Thunderstorms then Slight Chance Rain And Snow Showers
5 to 22 mph N

A slight chance of showers and thunderstorms before midnight, then a slight chance of rain and snow showers. Partly cloudy, with a low around 31.

Monday
May 18
63°F
Slight Chance Snow Showers then Chance Showers And Thunderstorms
5 to 18 mph WNW

A slight chance of snow showers before 9am, then a slight chance of rain and snow showers between 9am and noon, then a chance of showers and thunderstorms. Mostly sunny, with a high near 63.

Detailed Forecast

Period Conditions Temp Wind
Overnight
May 12
Clear
35°F
5 mph
SSW
Tuesday
May 12
Sunny
72°F
2 to 17 mph
SW
Tuesday Night
May 12
Mostly Clear
36°F
5 to 13 mph
SE
Wednesday
May 13
Sunny
77°F
1 to 18 mph
S
Wednesday Night
May 13
Partly Cloudy
41°F
6 to 20 mph
SW
Thursday
May 14
Sunny
68°F
7 to 29 mph
W
Thursday Night
May 14
Mostly Clear
32°F
2 to 28 mph
WSW
Friday
May 15
Sunny
73°F
2 to 20 mph
WSW
Friday Night
May 15
Mostly Clear
35°F
3 to 18 mph
N
Saturday
May 16
Sunny
74°F
1 to 26 mph
SSW
Saturday Night
May 16
Partly Cloudy
36°F
1 to 25 mph
SW
Sunday
May 17
Mostly Sunny then Slight Chance Showers And Thunderstorms
67°F
2 to 25 mph
SW
Sunday Night
May 17
Slight Chance Showers And Thunderstorms then Slight Chance Rain And Snow Showers
31°F
5 to 22 mph
N
Monday
May 18
Slight Chance Snow Showers then Chance Showers And Thunderstorms
63°F
5 to 18 mph
WNW

Nearby Forecasts

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

Nearby forecast pages are not available for this location yet.

Coverage

Tracked cities
0
Coverage
0%

Forecast coverage currently spans 0 of 0 mapped cities in Grand County.

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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.