Johnstown 7-day weather forecast

Written by:
March 23, 2026
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Johnstown 7-day weather forecast

created the forecast for Johnstown, Pennsylvania using data from . This week's high is 90 掳F on Monday, while the low is 49 掳F on Thursday. There is expected to be 1 sunny day and rain on 7 days this week.

There are currently no weather alerts.

Monday, May 18

- High of 90 掳F, low of 62 掳F (46% humidity)
- Sunny with a 100% 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 5:57 AM, sunset at 8:27 PM
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1 / 6
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Tuesday, May 19

- High of 87 掳F, low of 62 掳F (46% humidity)
- Partly cloudy with a 100% chance of rain (0 mm of rain)
- Very high risk of harm from sun exposure (9 UV index)
- Moderate breeze (15 mph wind)
- Sunrise at 5:56 AM, sunset at 8:28 PM
2 / 6
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Wednesday, May 20

- High of 78 掳F, low of 57 掳F (62% humidity)
- Mostly cloudy with a 100% chance of rain (2 mm of rain)
- Moderate risk of harm from sun exposure (2 UV index)
- Moderate breeze (13 mph wind)
- Sunrise at 5:55 AM, sunset at 8:29 PM
3 / 6
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Thursday, May 21

- High of 59 掳F, low of 49 掳F (45% humidity)
- Overcast with a 24% chance of rain (0 mm of rain)
- Very high risk of harm from sun exposure (7 UV index)
- Light breeze (7 mph wind)
- Sunrise at 5:54 AM, sunset at 8:30 PM
4 / 6
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Friday, May 22

- High of 54 掳F, low of 49 掳F (94% humidity)
- Overcast with a 100% chance of rain (20 mm of rain)
- Moderate breeze (13 mph wind)
- Sunrise at 5:53 AM, sunset at 8:31 PM
5 / 6
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Saturday, May 23

- High of 52 掳F, low of 49 掳F (99% humidity)
- Overcast with a 100% chance of rain (26 mm of rain)
- Gentle breeze (12 mph wind)
- Sunrise at 5:53 AM, sunset at 8:31 PM
- First quarter moon
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6 / 6
Deborah Kolb // Shutterstock

Sunday, May 24

- High of 53 掳F, low of 50 掳F (97% humidity)
- Overcast with a 100% chance of rain (8 mm of rain)
- Gentle breeze (10 mph wind)
- Sunrise at 5:52 AM, sunset at 8:32 PM

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