Johnstown, CO Weather Forecast
Local 7-day forecast
Mostly Sunny
Track current conditions, temperature changes, wind, and the full daily outlook for Johnstown, CO in one place.
Mostly sunny, with a high near 68. East northeast wind around 7 mph.
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: Oct 11, 2026 10:40 PM MDT.
The active forecast window currently covers Oct 13 to Oct 18, 2026 for Johnstown, CO.
Page Snapshot
- Page focus
- city weather
- Forecast window
- Oct 13 to Oct 18, 2026
- Latest sync
- Oct 11, 2026 10:40 PM MDT
- Forecast office
- BOU
- Source
- NOAA / NWS
Daily Outlook
This Week in Johnstown
Sunday looks like the warmest upcoming period in Johnstown at 76 degrees F.
Friday Night is the coolest period ahead with temperatures near 34 degrees F.
The strongest winds are forecast for Wednesday at about 6 to 14 mph NE.
Precipitation is mentioned in 5 upcoming forecast periods.
Forecast Details
- Last updated
- Oct 11, 2026 10:40 PM MDT
- Coverage
- 6 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
Rain showers likely. Mostly cloudy, with a low around 43. Northeast wind 7 to 12 mph, with gusts as high as 21 mph. Chance of precipitation is 70%.
Rain showers. Cloudy, with a high near 55. Chance of precipitation is 80%.
Rain showers likely. Mostly cloudy, with a low around 39.
A slight chance of rain showers. Mostly sunny, with a high near 62.
A chance of rain showers. Partly cloudy, with a low around 37.
Sunny, with a high near 61.
Mostly clear, with a low around 34.
Sunny, with a high near 72.
Mostly clear, with a low around 41.
Sunny, with a high near 76.
Detailed Forecast
| Period | Conditions | Temp | Wind |
|---|---|---|---|
|
Tuesday
Oct 13
|
Mostly Sunny
|
68°F |
7 mph
ENE
|
|
Tuesday Night
Oct 13
|
Rain Showers Likely
|
43°F |
7 to 12 mph
NE
|
|
Wednesday
Oct 14
|
Rain Showers
|
55°F |
6 to 14 mph
NE
|
|
Wednesday Night
Oct 14
|
Rain Showers Likely
|
39°F |
2 to 6 mph
N
|
|
Thursday
Oct 15
|
Slight Chance Rain Showers
|
62°F |
2 to 10 mph
NW
|
|
Thursday Night
Oct 15
|
Chance Rain Showers
|
37°F |
3 to 9 mph
N
|
|
Friday
Oct 16
|
Sunny
|
61°F |
5 mph
ENE
|
|
Friday Night
Oct 16
|
Mostly Clear
|
34°F |
3 mph
E
|
|
Saturday
Oct 17
|
Sunny
|
72°F |
2 mph
SSE
|
|
Saturday Night
Oct 17
|
Mostly Clear
|
41°F |
3 mph
NW
|
|
Sunday
Oct 18
|
Sunny
|
76°F |
3 mph
SSW
|
Nearby Forecasts
Explore weather pages for nearby cities and major places around Johnstown.
