Jefferson County, CO Weather Forecast
County weather hub
Showers And Thunderstorms Likely
Compare major city weather across Jefferson County, scan the latest forecast snapshots, and jump into local 7-day outlook pages from one hub.
A chance of rain showers between 10am and noon, then showers and thunderstorms likely. Partly sunny. High near 63, with temperatures falling to around 60 in the afternoon. East wind 2 to 7 mph. Chance of precipitation is 60%.
County Weather Overview
This county weather page brings together forecast coverage for Jefferson County so visitors can compare temperatures, wind, and conditions across the region without hopping between unrelated pages.
Current forecast coverage spans 8 of 8 mapped cities in Jefferson County.
Page Snapshot
- Page focus
- county weather
- Forecast window
- May 28 to Jun 2, 2026
- Latest sync
- May 27, 2026 6:04 PM MDT
- Forecast office
- BOU
- Source
- NOAA / NWS
Daily Outlook
This Week in Jefferson County
Friday looks like the warmest upcoming period in Jefferson County at 67 degrees F.
Saturday Night is the coolest period ahead with temperatures near 42 degrees F.
The strongest winds are forecast for Thursday Night at about 3 to 9 mph SW.
Precipitation is mentioned in 11 upcoming forecast periods.
Forecast Details
- Last updated
- May 27, 2026 6:04 PM 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 sourceExtended Forecast
A chance of showers and thunderstorms before midnight. Mostly cloudy, with a low around 46. Southwest wind 3 to 9 mph. Chance of precipitation is 30%.
A chance of showers and thunderstorms after noon. Partly sunny, with a high near 67. South wind 3 to 8 mph. Chance of precipitation is 50%.
A slight chance of showers and thunderstorms before midnight. Partly cloudy, with a low around 43. Chance of precipitation is 20%.
A slight chance of showers and thunderstorms after noon. Sunny, with a high near 65.
Partly cloudy, with a low around 42.
A chance of showers and thunderstorms after noon. Mostly sunny, with a high near 66.
A chance of showers and thunderstorms before midnight. Partly cloudy, with a low around 43.
Showers and thunderstorms likely after noon. Mostly sunny, with a high near 66.
A chance of showers and thunderstorms before midnight. Partly cloudy, with a low around 44.
Showers and thunderstorms likely after noon. Partly sunny, with a high near 66.
A chance of showers and thunderstorms before midnight. Mostly cloudy, with a low around 44.
Detailed Forecast
| Period | Conditions | Temp | Wind |
|---|---|---|---|
|
Thursday
May 28
|
Showers And Thunderstorms Likely
|
63°F |
2 to 7 mph
E
|
|
Thursday Night
May 28
|
Chance Showers And Thunderstorms then Mostly Cloudy
|
46°F |
3 to 9 mph
SW
|
|
Friday
May 29
|
Partly Sunny then Chance Showers And Thunderstorms
|
67°F |
3 to 8 mph
S
|
|
Friday Night
May 29
|
Slight Chance Showers And Thunderstorms then Partly Cloudy
|
43°F |
8 mph
SW
|
|
Saturday
May 30
|
Sunny then Slight Chance Showers And Thunderstorms
|
65°F |
5 to 8 mph
N
|
|
Saturday Night
May 30
|
Partly Cloudy
|
42°F |
3 to 7 mph
WNW
|
|
Sunday
May 31
|
Mostly Sunny then Chance Showers And Thunderstorms
|
66°F |
3 to 9 mph
SSE
|
|
Sunday Night
May 31
|
Chance Showers And Thunderstorms then Partly Cloudy
|
43°F |
2 to 7 mph
WNW
|
|
Monday
Jun 1
|
Mostly Sunny then Showers And Thunderstorms Likely
|
66°F |
2 to 9 mph
ESE
|
|
Monday Night
Jun 1
|
Chance Showers And Thunderstorms then Partly Cloudy
|
44°F |
1 to 7 mph
WNW
|
|
Tuesday
Jun 2
|
Partly Sunny then Showers And Thunderstorms Likely
|
66°F |
3 to 9 mph
SSE
|
|
Tuesday Night
Jun 2
|
Chance Showers And Thunderstorms then Mostly Cloudy
|
44°F |
3 to 7 mph
SSW
|
Major City Forecasts
Live forecast snapshots for major cities across Jefferson County.
Coverage
Forecast coverage currently spans 8 of 8 mapped cities in Jefferson County.
Largest mapped city population in this region: 157,429.
