Johnstown Cambria County Airport (JST) Weather 08/02/2026
Today
77
Patchy Fog then Mostly Sunny
Tonight
61
Slight Chance T-storms then Partly Cloudy
Monday
79
Mostly Sunny
Monday Night
64
Chance T-storms then Showers
Tuesday
74
Showers
Tuesday Night
61
Showers Likely
Wednesday
72
Showers Likely
Wednesday Night
58
Showers Likely then Chance Showers
Thursday
72
Mostly Sunny then Chance Showers
Thursday Night
58
Chance Showers then Mostly Clear
Friday
75
Mostly Sunny
Friday Night
61
Partly Cloudy
Saturday
76
Partly Sunny then Chance Showers
Weekly Forecast
Today
Patchy fog between 8am and 9am. Otherwise, sunny, with a high near 77. Calm wind becoming northwest 5 to 8 mph in the morning.
Tonight
A slight chance of showers and thunderstorms before 9pm. Partly cloudy, with a low around 61. Northwest wind around 5 mph becoming calm in the evening. Chance of precipitation is 20%.
Monday
Mostly sunny, with a high near 79. West wind 5 to 8 mph.
Monday Night
A chance of showers and thunderstorms, then showers and possibly a thunderstorm after 2am. Low around 64. South wind 5 to 8 mph. Chance of precipitation is 90%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.
Tuesday
Showers and possibly a thunderstorm. High near 74. Southwest wind around 10 mph. Chance of precipitation is 100%. New rainfall amounts between a half and three quarters of an inch possible.
Tuesday Night
Showers likely and possibly a thunderstorm. Mostly cloudy, with a low around 61. Chance of precipitation is 70%. New precipitation amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.
Wednesday
A chance of showers, then showers likely and possibly a thunderstorm after 2pm. Mostly cloudy, with a high near 72. Chance of precipitation is 60%.
Wednesday Night
Showers likely and possibly a thunderstorm before 8pm, then a chance of showers between 8pm and 2am. Partly cloudy, with a low around 58. Chance of precipitation is 60%.
Thursday
A chance of showers after 2pm. Mostly sunny, with a high near 72. Chance of precipitation is 30%.
Thursday Night
A chance of showers before 8pm. Partly cloudy, with a low around 58. Chance of precipitation is 30%.
Friday
Mostly sunny, with a high near 75.
Friday Night
Partly cloudy, with a low around 61.
Saturday
A chance of showers. Partly sunny, with a high near 76. Chance of precipitation is 40%.