Cambria County Airport (JST) 15 Day Weather Forecast, Johnstown United States
Current weather conditions and 15 day weather forecast for Cambria County Airport in Johnstown, United States including weather daily high/low temperature, warnings, chance of precipitation, pressure, humidity/wind chill, rain, wind speed, cloud, pressure, and UV index.
Current weather conditions at JST
| 15 December 2025 Mon -13.3 ° C ( 8.1°F )  Patchy light snow |
Feels Like : -21 ° C / -5.9°F Humidity : % 87 Pressure : 1026 mb Wind Speed : 15.8 kmph / 9.8 miles from WSW 
Visibility : 4.8 km Precipitation (rainfall) : 0 mm Cloud (%) : 100 |
15-day weather forecast for Cambria County Airport, Johnstown, United States
| Date | Weather forecast | Low temperature | High temperature | Average Temperature | Humidity | Wind | Chance of rain |
|---|---|---|---|---|---|---|---|
| 15 December 2025 Mon |  Light freezing rain |
-17.4 ° C | -5.2 ° C | -11.1 ° C | % 69 | 21.2 km/h | 75% |
| 16 December 2025 Tue |  Partly Cloudy |
-7.9 ° C | -0.9 ° C | -4.6 ° C | % 61 | 19.4 km/h | 0% |
| 17 December 2025 Wed |  Cloudy |
-2.5 ° C | 3 ° C | 0.8 ° C | % 81 | 32 km/h | 0% |
| 18 December 2025 Thu |  Moderate or heavy snow showers |
-8.1 ° C | 2.2 ° C | -1.2 ° C | % 84 | 32.4 km/h | 68% |
| 19 December 2025 Fri |  Blizzard |
-8.1 ° C | 2.3 ° C | -0.6 ° C | % 89 | 34.2 km/h | 88% |
| 20 December 2025 Sat | Light freezing rain |
-9.5 ° C | 0.5 ° C | -3.2 ° C | % 77 | 14 km/h | 74% |
| 21 December 2025 Sun |  Patchy rain nearby |
-3.7 ° C | 5.7 ° C | 2 ° C | % 91 | 24.8 km/h | 83% |
| 22 December 2025 Mon |  Light snow |
-8 ° C | -2.7 ° C | -5.3 ° C | % 80 | 27 km/h | 75% |
| 23 December 2025 Tue | Partly Cloudy |
-6.3 ° C | 6.1 ° C | 0 ° C | % 71 | 20.5 km/h | 0% |
| 24 December 2025 Wed | Patchy rain nearby |
-1.9 ° C | 7.1 ° C | 4.4 ° C | % 93 | 25.9 km/h | 87% |
| 25 December 2025 Thu | Light freezing rain |
-8.2 ° C | -4.6 ° C | -5.9 ° C | % 70 | 28.1 km/h | 0% |
| 26 December 2025 Fri |  Heavy snow |
-6.4 ° C | -0.9 ° C | -4.4 ° C | % 86 | 18.4 km/h | 88% |
| 27 December 2025 Sat | Light freezing rain |
-15.8 ° C | -9.2 ° C | -12.3 ° C | % 88 | 22 km/h | 89% |
| 28 December 2025 Sun |  Mist |
-15.8 ° C | -4.6 ° C | -10.4 ° C | % 87 | 8.3 km/h | 0% |
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