Johnstown, CO Weather Forecast
Local 7-day forecast
Partly Sunny then Chance Showers And Thunderstorms
Track current conditions, temperature changes, wind, and the full daily outlook for Johnstown, CO in one place.
A chance of showers and thunderstorms after noon. Partly sunny, with a high near 83. Chance of precipitation is 30%.
Local Weather Overview
This forecast page for Johnstown, 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: May 24, 2026 1:40 AM MDT.
The active forecast window currently covers May 26 to May 30, 2026 for Johnstown, CO.
Page Snapshot
- Page focus
- city weather
- Forecast window
- May 26 to May 30, 2026
- Latest sync
- May 24, 2026 1:40 AM MDT
- Forecast office
- BOU
- Source
- NOAA / NWS
Daily Outlook
This Week in Johnstown
Tuesday looks like the warmest upcoming period in Johnstown at 83 degrees F.
Friday Night is the coolest period ahead with temperatures near 50 degrees F.
The strongest winds are forecast for Tuesday at about 2 to 28 mph ENE.
Precipitation is mentioned in 9 upcoming forecast periods.
Forecast Details
- Last updated
- May 24, 2026 1:40 AM 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 52.
Showers and thunderstorms likely after noon. Mostly cloudy, with a high near 75.
A chance of showers and thunderstorms before midnight. Mostly cloudy, with a low around 51.
A chance of showers and thunderstorms after noon. Partly sunny, with a high near 78.
A chance of showers and thunderstorms. Partly cloudy, with a low around 52.
A slight chance of rain showers before noon, then a chance of showers and thunderstorms. Partly sunny, with a high near 79.
Showers and thunderstorms likely. Mostly cloudy, with a low around 50.
A slight chance of rain showers before noon, then a chance of showers and thunderstorms. Partly sunny, with a high near 77.
Detailed Forecast
| Period | Conditions | Temp | Wind |
|---|---|---|---|
|
Tuesday
May 26
|
Partly Sunny then Chance Showers And Thunderstorms
|
83°F |
2 to 28 mph
ENE
|
|
Tuesday Night
May 26
|
Showers And Thunderstorms Likely
|
52°F |
3 to 25 mph
ESE
|
|
Wednesday
May 27
|
Mostly Cloudy then Showers And Thunderstorms Likely
|
75°F |
5 to 8 mph
ENE
|
|
Wednesday Night
May 27
|
Chance Showers And Thunderstorms then Mostly Cloudy
|
51°F |
2 to 8 mph
NE
|
|
Thursday
May 28
|
Partly Sunny then Chance Showers And Thunderstorms
|
78°F |
3 to 9 mph
ENE
|
|
Thursday Night
May 28
|
Chance Showers And Thunderstorms
|
52°F |
5 to 9 mph
ENE
|
|
Friday
May 29
|
Slight Chance Rain Showers then Chance Showers And Thunderstorms
|
79°F |
5 to 15 mph
ENE
|
|
Friday Night
May 29
|
Showers And Thunderstorms Likely
|
50°F |
5 to 15 mph
ENE
|
|
Saturday
May 30
|
Slight Chance Rain Showers then Chance Showers And Thunderstorms
|
77°F |
5 to 9 mph
SE
|
Nearby Forecasts
Explore weather pages for nearby cities and major places around Johnstown.
