Boulder County, CO Weather Forecast
County weather hub
Partly Sunny then Showers And Thunderstorms
Compare major city weather across Boulder County, scan the latest forecast snapshots, and jump into local 7-day outlook pages from one hub.
Showers and thunderstorms after noon. Partly sunny, with a high near 68.
County Weather Overview
This county weather page brings together forecast coverage for Boulder County so visitors can compare temperatures, wind, and conditions across the region without hopping between unrelated pages.
Current forecast coverage spans 4 of 4 mapped cities in Boulder County.
Page Snapshot
- Page focus
- county weather
- Forecast window
- May 26 to May 29, 2026
- Latest sync
- May 23, 2026 2:05 PM MDT
- Forecast office
- BOU
- Source
- NOAA / NWS
Daily Outlook
This Week in Boulder County
Tuesday looks like the warmest upcoming period in Boulder County at 68 degrees F.
Tuesday Night is the coolest period ahead with temperatures near 49 degrees F.
The strongest winds are forecast for Tuesday at about 0 to 8 mph SE.
Precipitation is mentioned in 8 upcoming forecast periods.
Forecast Details
- Last updated
- May 23, 2026 2:05 PM MDT
- Coverage
- 5 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 sourceExtended Forecast
Showers and thunderstorms likely. Mostly cloudy, with a low around 49.
A chance of rain showers before noon, then showers and thunderstorms. Mostly cloudy, with a high near 63.
A chance of showers and thunderstorms before midnight. Mostly cloudy, with a low around 50.
Showers and thunderstorms likely after noon. Partly sunny, with a high near 65.
A chance of showers and thunderstorms before midnight. Mostly cloudy, with a low around 51.
Showers and thunderstorms likely after noon. Partly sunny, with a high near 68.
A chance of showers and thunderstorms. Mostly cloudy, with a low around 49.
Detailed Forecast
| Period | Conditions | Temp | Wind |
|---|---|---|---|
|
Tuesday
May 26
|
Partly Sunny then Showers And Thunderstorms
|
68°F |
0 to 8 mph
SE
|
|
Tuesday Night
May 26
|
Showers And Thunderstorms Likely
|
49°F |
0 to 6 mph
SW
|
|
Wednesday
May 27
|
Showers And Thunderstorms
|
63°F |
0 to 3 mph
ENE
|
|
Wednesday Night
May 27
|
Chance Showers And Thunderstorms then Mostly Cloudy
|
50°F |
2 mph
NE
|
|
Thursday
May 28
|
Partly Sunny then Showers And Thunderstorms Likely
|
65°F |
0 to 6 mph
E
|
|
Thursday Night
May 28
|
Chance Showers And Thunderstorms then Mostly Cloudy
|
51°F |
0 to 5 mph
SSW
|
|
Friday
May 29
|
Partly Sunny then Showers And Thunderstorms Likely
|
68°F |
0 to 7 mph
ENE
|
|
Friday Night
May 29
|
Chance Showers And Thunderstorms
|
49°F |
0 to 6 mph
WNW
|
Major City Forecasts
Live forecast snapshots for major cities across Boulder County.
Coverage
Forecast coverage currently spans 4 of 4 mapped cities in Boulder County.
Largest mapped city population in this region: 107,645.
