Johnstown 7-day weather forecast

Written by:
March 23, 2026
ESOlex // Shutterstock

Johnstown 7-day weather forecast

Stacker created the forecast for Johnstown, Pennsylvania using data from OpenWeather. This week's high is 75 °F on Monday, while the low is 36 °F on Sunday. There are expected to be 3 sunny days and rain on 3 days this week.

There are currently no weather alerts.

Monday, May 25

- High of 75 °F, low of 59 °F (73% humidity)
- Overcast with a 100% chance of rain (6 mm of rain)
- High risk of harm from sun exposure (7 UV index)
- Light breeze (5 mph wind)
- Sunrise at 5:51 AM, sunset at 8:33 PM
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Tuesday, May 26

- High of 72 °F, low of 60 °F (89% humidity)
- Overcast with a 0% chance of rain
- Very high risk of harm from sun exposure (9 UV index)
- Light breeze (4 mph wind)
- Sunrise at 5:51 AM, sunset at 8:34 PM
2 / 6
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Wednesday, May 27

- High of 70 °F, low of 58 °F (97% humidity)
- Overcast with a 72% chance of rain (1 mm of rain)
- Very high risk of harm from sun exposure (9 UV index)
- Gentle breeze (10 mph wind)
- Sunrise at 5:50 AM, sunset at 8:35 PM
3 / 6
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Thursday, May 28

- High of 71 °F, low of 49 °F (44% humidity)
- Mostly sunny with a 0% chance of rain
- Very high risk of harm from sun exposure (8 UV index)
- Moderate breeze (13 mph wind)
- Sunrise at 5:50 AM, sunset at 8:36 PM
4 / 6
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Friday, May 29

- High of 73 °F, low of 45 °F (32% humidity)
- Sunny with a 0% chance of rain
- Gentle breeze (9 mph wind)
- Sunrise at 5:49 AM, sunset at 8:36 PM
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Saturday, May 30

- High of 65 °F, low of 43 °F (36% humidity)
- Overcast with a 20% chance of rain (0 mm of rain)
- Gentle breeze (11 mph wind)
- Sunrise at 5:49 AM, sunset at 8:37 PM
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Sunday, May 31

- High of 63 °F, low of 36 °F (44% humidity)
- Mostly sunny with a 0% chance of rain
- Gentle breeze (10 mph wind)
- Sunrise at 5:48 AM, sunset at 8:38 PM
- Full moon

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