Johnstown 7-day weather forecast

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December 15, 2025
ESOlex // Shutterstock

Johnstown 7-day weather forecast

Stacker created the forecast for Johnstown, Pennsylvania using data from OpenWeather. This week's high is 47 °F on Sunday, while the low is 9 °F on Monday. There are expected to be 0 sunny days, snow on 1 day, and 3 days of rain this week.

NWS State College PA has issued a cold weather advisory until Monday at 09:00 AM and a winter weather advisory until Monday at 07:00 AM.

Monday, December 15

- High of 20 °F, low of 9 °F (84% humidity)
- Overcast with a 25% chance of snow (0 mm of snow)
- Moderate breeze (12 mph wind)
- Sunrise at 7:31 AM, sunset at 4:50 PM
1 / 6
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Tuesday, December 16

- High of 35 °F, low of 10 °F (70% humidity)
- Partly sunny with a 0% chance of rain
- Gentle breeze (10 mph wind)
- Sunrise at 7:32 AM, sunset at 4:50 PM
2 / 6
Onishchenko Natalya // Shutterstock

Wednesday, December 17

- High of 40 °F, low of 35 °F (91% humidity)
- Mostly cloudy with a 0% chance of rain
- Moderate breeze (15 mph wind)
- Sunrise at 7:32 AM, sunset at 4:50 PM
3 / 6
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Thursday, December 18

- High of 46 °F, low of 29 °F (93% humidity)
- Overcast with a 100% chance of rain (6 mm of rain)
- Moderate breeze (13 mph wind)
- Sunrise at 7:33 AM, sunset at 4:51 PM
4 / 6
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Friday, December 19

- High of 39 °F, low of 23 °F (88% humidity)
- Overcast with a 100% chance of rain (5 mm of rain)
- Moderate breeze (18 mph wind)
- Sunrise at 7:34 AM, sunset at 4:51 PM
- New moon
5 / 6
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Saturday, December 20

- High of 39 °F, low of 22 °F (69% humidity)
- Mostly cloudy with a 0% chance of rain
- Gentle breeze (9 mph wind)
- Sunrise at 7:34 AM, sunset at 4:52 PM
6 / 6
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Sunday, December 21

- High of 47 °F, low of 30 °F (97% humidity)
- Overcast with a 100% chance of rain (9 mm of rain)
- Moderate breeze (14 mph wind)
- Sunrise at 7:35 AM, sunset at 4:52 PM

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