Johnstown Weather Forecast
- 59
- 87
Chance Thunderstorms
- 57
- 86
Thunderstorms Likely
- 58
- 91
Slight Chance Thunderstorms
- 59
- 96
Mostly Sunny
- 61
- 98
Hot
- 63
- 100
Hot
Today 23 Jul Central and South Weld County
Mostly cloudy. Slight chance of Showers late in the Morning, then a chance of Thunderstorms in the afternoon. Some Thunderstorms may produce heavy rainfall in the afternoon. Highs in the mid 80s. North Winds 10 to 15 Mph. Chance of rain 50 percent.
Tonight 23 Jul Central and South Weld County
Mostly cloudy with a chance of Thunderstorms early in the Evening, then mostly cloudy with a slight chance of Showers in the late evening and early morning. Partly cloudy towards Sunrise. Lows in the upper 50s. Chance of rain 50 percent.
Johnstown Temperature Statistics
July Temperature
Fort Collins/Loveland - Northern Colorado Regional Airport (9.3 miles)
Lowest 7 July, 2025
54 °FAverage July
75.5 °FHighest 9 July, 2025
100.9 °F
Climate (2020–Present)
Fort Collins/Loveland - Northern Colorado Regional Airport (9.3 miles)
Average Low 2020–2025
37.6 °FAverage 2020–2025
50.8 °FAverage High 2020–2025
64.9 °F