Allentown 7-day weather forecast

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

Stacker created the forecast for Allentown, Pennsylvania using data from OpenWeather. This week's high is 93 °F on Monday, while the low is 47 °F on Friday. There is expected to be 1 sunny day and rain on 6 days this week.

There are currently no weather alerts.

Monday, May 18

- High of 93 °F, low of 66 °F (61% humidity)
- Fair with a 29% chance of rain (0 mm of rain)
- Very high risk of harm from sun exposure (9 UV index)
- Gentle breeze (9 mph wind)
- Sunrise at 5:42 AM, sunset at 8:14 PM
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1 / 6
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Tuesday, May 19

- High of 88 °F, low of 65 °F (59% humidity)
- Mostly cloudy with a 46% chance of rain (0 mm of rain)
- Very high risk of harm from sun exposure (9 UV index)
- Moderate breeze (13 mph wind)
- Sunrise at 5:41 AM, sunset at 8:15 PM
2 / 6
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Wednesday, May 20

- High of 84 °F, low of 60 °F (58% humidity)
- Partly cloudy with a 100% chance of rain (1 mm of rain)
- Very high risk of harm from sun exposure (9 UV index)
- Moderate breeze (14 mph wind)
- Sunrise at 5:40 AM, sunset at 8:16 PM
3 / 6
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Thursday, May 21

- High of 63 °F, low of 53 °F (56% humidity)
- Overcast with a 0% chance of rain
- Very high risk of harm from sun exposure (8 UV index)
- Gentle breeze (10 mph wind)
- Sunrise at 5:40 AM, sunset at 8:17 PM
4 / 6
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Friday, May 22

- High of 59 °F, low of 47 °F (66% humidity)
- Overcast with a 96% chance of rain (1 mm of rain)
- Light breeze (7 mph wind)
- Sunrise at 5:39 AM, sunset at 8:18 PM
5 / 6
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Saturday, May 23

- High of 51 °F, low of 48 °F (98% humidity)
- Overcast with a 100% chance of rain (22 mm of rain)
- Gentle breeze (9 mph wind)
- Sunrise at 5:38 AM, sunset at 8:18 PM
- First quarter moon
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6 / 6
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Sunday, May 24

- High of 54 °F, low of 49 °F (95% humidity)
- Overcast with a 100% chance of rain (17 mm of rain)
- Gentle breeze (11 mph wind)
- Sunrise at 5:37 AM, sunset at 8:19 PM

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