Live Weather & Forecast

Weather in Johnstown

Colorado, United States · Real-time conditions & 3-day outlook

Flag of United States
Sunny
16°C
Feels like 16°C
60°F / Feels 60°F
Sunny
Johnstown, Colorado
🌞 Daytime
Updated: 2026-04-13 08:30
💧
Humidity
18%
💨
Wind
29.5 km/h W
🌬️
Wind Gust
38.9 km/h
🌡️
Pressure
1012 mb
👁️
Visibility
16 km
☀️
UV Index
0.6 (Low)
🌧️
Precipitation
0 mm
☁️
Cloud Cover
0%
💦
Dew Point
-3.7°C
🌐
Wind Degree
269°

Air Quality Index

US EPA: Good UK DEFRA: Low (1)
CO
124.9 μg/m³
NO₂
1.6 μg/m³
O₃
124 μg/m³
SO₂
1.3 μg/m³
PM 2.5
3.4 μg/m³
PM 10
9.4 μg/m³

Weather Alerts 5

Met · Severe · Expected
Red Flag Warning issued April 12 at 11:50AM MDT until April 12 at 8:00PM MDT by NWS Denver CO

...TODAY'S RED FLAG WARNING REMAINS IN EFFECT AND UNCHANGED UNTIL 8 PM MDT THIS EVENING... .ALL ZONES IN MONDAY'S FIRE WEATHER WATCH HAVE BEEN UPGRADED TO A RED FLAG WARNING EXCEPT FOR WASHINGTON COUNTY WHERE WINDS WILL BE MORE MARGINAL. The National Weather Service in Denver has issued a Red Flag Warning for wind and low relative humidity, which is in effect from 11 AM to 8 PM MDT Monday. The F...

A Red Flag Warning means that critical fire weather conditions are either occurring now....or will shortly. A combination of strong winds...low relative humidity...and warm temperatures can contribute to extreme fire behavior.

Effective: 2026-04-12T11:50:00-06:00  ·  Expires: 2026-04-13T06:15:00-06:00
Met · Severe · Expected
Red Flag Warning issued April 12 at 11:50AM MDT until April 13 at 8:00PM MDT by NWS Denver CO

...TODAY'S RED FLAG WARNING REMAINS IN EFFECT AND UNCHANGED UNTIL 8 PM MDT THIS EVENING... .ALL ZONES IN MONDAY'S FIRE WEATHER WATCH HAVE BEEN UPGRADED TO A RED FLAG WARNING EXCEPT FOR WASHINGTON COUNTY WHERE WINDS WILL BE MORE MARGINAL. The National Weather Service in Denver has issued a Red Flag Warning for wind and low relative humidity, which is in effect from 11 AM to 8 PM MDT Monday. The F...

A Red Flag Warning means that critical fire weather conditions are either occurring now....or will shortly. A combination of strong winds...low relative humidity...and warm temperatures can contribute to extreme fire behavior.

Effective: 2026-04-12T11:50:00-06:00  ·  Expires: 2026-04-13T06:15:00-06:00
Met · Severe · Expected
Red Flag Warning issued April 12 at 11:50AM MDT until April 13 at 8:00PM MDT by NWS Denver CO

...TODAY'S RED FLAG WARNING REMAINS IN EFFECT AND UNCHANGED UNTIL 8 PM MDT THIS EVENING... .ALL ZONES IN MONDAY'S FIRE WEATHER WATCH HAVE BEEN UPGRADED TO A RED FLAG WARNING EXCEPT FOR WASHINGTON COUNTY WHERE WINDS WILL BE MORE MARGINAL. The National Weather Service in Denver has issued a Red Flag Warning for wind and low relative humidity, which is in effect from 11 AM to 8 PM MDT Monday. The F...

A Red Flag Warning means that critical fire weather conditions are either occurring now....or will shortly. A combination of strong winds...low relative humidity...and warm temperatures can contribute to extreme fire behavior.

Effective: 2026-04-12T11:50:00-06:00  ·  Expires: 2026-04-13T06:15:00-06:00
Met · Severe · Expected
Red Flag Warning issued April 12 at 8:00PM MDT until April 13 at 8:00PM MDT by NWS Denver CO

* AFFECTED AREA...Fire Weather Zones 214, 216, 238, 241, 246 and 247. * TIMING...From 11 AM to 8 PM MDT Monday. * WINDS...Southwest 10 to 20 mph with gusts up to 35 mph. * RELATIVE HUMIDITY...As low as 9 percent. * IMPACTS...Conditions will be favorable for rapid fire spread. Avoid outdoor burning and any activity that may produce a spark and start a wildfire.

A Red Flag Warning means that critical fire weather conditions are either occurring now....or will shortly. A combination of strong winds...low relative humidity...and warm temperatures can contribute to extreme fire behavior.

Effective: 2026-04-12T20:00:00-06:00  ·  Expires: 2026-04-13T04:00:00-06:00
Met · Severe · Expected
Red Flag Warning issued April 12 at 8:00PM MDT until April 13 at 8:00PM MDT by NWS Denver CO

* AFFECTED AREA...Fire Weather Zone 242. * TIMING...From 11 AM to 8 PM MDT Monday. * WINDS...West 10 to 15 mph with gusts up to 30 mph. * RELATIVE HUMIDITY...As low as 11 percent. * IMPACTS...Conditions will be favorable for rapid fire spread. Avoid outdoor burning and any activity that may produce a spark and start a wildfire.

A Red Flag Warning means that critical fire weather conditions are either occurring now....or will shortly. A combination of strong winds...low relative humidity...and warm temperatures can contribute to extreme fire behavior.

Effective: 2026-04-12T20:00:00-06:00  ·  Expires: 2026-04-13T04:00:00-06:00

Today's Hourly Forecast

24-hour breakdown for Johnstown, Colorado

12 AM
Clear
9°
Clear
💧 31% 💨 5 km/h
1 AM
Clear
8°
Clear
💧 36% 💨 9 km/h
2 AM
Clear
7°
Clear
💧 42% 💨 14.4 km/h
3 AM
Clear
6°
Clear
💧 46% 💨 13 km/h
4 AM
Clear
6°
Clear
💧 49% 💨 12.2 km/h
5 AM
Clear
5°
Clear
💧 52% 💨 15.1 km/h
6 AM
Clear
4°
Clear
💧 57% 💨 16.2 km/h
7 AM
Sunny
6°
Sunny
💧 55% 💨 26.3 km/h
8 AM
Sunny
16°
Sunny
💧 18% 💨 29.5 km/h
9 AM
Sunny
13°
Sunny
💧 33% 💨 32 km/h
10 AM
Sunny
16°
Sunny
💧 20% 💨 28.1 km/h
11 AM
Partly Cloudy
17°
Partly Cloudy
💧 18% 💨 26.3 km/h
12 PM
Sunny
19°
Sunny
💧 16% 💨 30.2 km/h
1 PM
Sunny
21°
Sunny
💧 15% 💨 28.8 km/h
2 PM
Sunny
21°
Sunny
💧 14% 💨 17.6 km/h
3 PM
Sunny
22°
Sunny
💧 13% 💨 14.8 km/h
4 PM
Sunny
23°
Sunny
💧 14% 💨 21.6 km/h
5 PM
Sunny
22°
Sunny
💧 14% 💨 18.7 km/h
6 PM
Sunny
21°
Sunny
💧 14% 💨 15.5 km/h
7 PM
Sunny
17°
Sunny
💧 17% 💨 20.5 km/h
8 PM
Clear
15°
Clear
💧 22% 💨 17.6 km/h
9 PM
Clear
13°
Clear
💧 23% 💨 10.8 km/h
10 PM
Overcast
12°
Overcast
💧 27% 💨 16.6 km/h
11 PM
Partly Cloudy
9°
Partly Cloudy
💧 31% 💨 16.6 km/h

3-Day Forecast

Daily overview for Johnstown, Colorado

Today
Sunny
Sunny
24° / 4°
🌧️ 0% chance of rain
💧 Avg. humidity: 29%
💨 Max wind: 32 km/h
🌧️ Total precip: 0 mm
☀️ UV Index: 1.8
🌅 Sunrise: 06:24 AM
🌇 Sunset: 07:37 PM
🌙 Waning Crescent
🌑 Moon: 23% lit
Tue, Apr 14
Patchy rain nearby
Patchy rain nearby
10° / 2°
🌧️ 84% chance of rain
💧 Avg. humidity: 57%
💨 Max wind: 39.2 km/h
🌧️ Total precip: 3.65 mm
☀️ UV Index: 1.4
🌅 Sunrise: 06:22 AM
🌇 Sunset: 07:38 PM
🌙 Waning Crescent
🌑 Moon: 15% lit
Wed, Apr 15
Sunny
Sunny
23° / -3°
🌧️ 0% chance of rain
💧 Avg. humidity: 41%
💨 Max wind: 25.6 km/h
🌧️ Total precip: 0 mm
☀️ UV Index: 1.8
🌅 Sunrise: 06:21 AM
🌇 Sunset: 07:39 PM
🌙 Waning Crescent
🌑 Moon: 8% lit

Best Time to Visit Johnstown

Plan your trip to Johnstown, United States around the most favorable weather conditions.

Peak Season
June – September
Warm, dry summers — ideal for outdoor activities.
Shoulder Season
April – May, October
Fewer crowds, moderate prices, mild weather.
Off Season
November – March
Cooler temperatures; some regions may experience rain or snow.
← Back to Johnstown 🗓 View Holidays 2026

Frequently Asked Questions

What is the current weather in Johnstown?
Current conditions in Johnstown: Sunny, temperature 16°C, humidity 18%.
What is the best time to visit Johnstown?
The best time to visit Johnstown is typically June – September. Warm, dry summers — ideal for outdoor activities.
What is the climate like in Johnstown?
Johnstown is located at approximately 40.3° latitude. It has a temperate climate with warm summers and cold winters.
Does it rain a lot in Johnstown?
The wettest period in Johnstown is typically during November – March. Cooler temperatures; some regions may experience rain or snow.
What should I pack for a trip to Johnstown?
For visits to Johnstown during June – September: light clothing and sun protection. For November – March: layers and a waterproof jacket are recommended.
What country is Johnstown in?
Johnstown is located in United States, in the state of Colorado.
What are the public holidays in Johnstown in 2026?
View the 2026 public holidays for Johnstown on our Holidays page.
What are the GPS coordinates used for the weather forecast in Johnstown?
The weather forecast for Johnstown uses coordinates 40.335, -104.9093.