Allentown, Pennsylvania · now
Clear
- High / Low
- 72° / 52°
- Wind
- 21 mph S
- Humidity
- 63%
Tomorrow· Thursday65°/49°· Slight Chance Rain Showers then Partly Sunny
7° warmer than yesterday at this time
Current weather and 7-day forecast for Allentown, Pennsylvania, sourced directly from the National Weather Service. Expect mostly cloudy then slight chance showers and thunderstorms today. Today's high is 72° with a low near 52°.
What to wear today
Long sleeves or short — your call
Sweet spot at 72°F. Most people will be comfortable in either.
Temperature · next 24 hours
Next 24 hours
-
8 AM
55°
2%
-
10 AM
62°
3%
-
12 PM
67°
3%
-
2 PM
71°
4%
-
4 PM
72°
15%
-
6 PM
70°
18%
-
8 PM
65°
51%
-
10 PM
61°
94%
-
12 AM
58°
85%
-
2 AM
56°
49%
-
4 AM
54°
52%
-
6 AM
53°
24%
Live radar
View full radar →7 days
- Today 5/13 Mostly Cloudy then Slight Chance Showers And Thunderstorms 94% 72° · 52°
- Thu 5/14 Slight Chance Rain Showers then Partly Sunny 24% 65° · 49°
- Fri 5/15
Partly Sunny 13% 70° · 51° - Sat 5/16 Mostly Sunny 6% 80° · 57°
- Sun 5/17 Sunny 15% 88° · 61°
- Mon 5/18 Mostly Sunny 13% 90° · 64°
- Tue 5/19 Mostly Sunny then Slight Chance Showers And Thunderstorms 23% 92° · 66°
Extended outlook days 8–16
- Wed 5/20
Drizzle 36% 69° · 59° - Thu 5/21 Drizzle 28% 59° · 53°
- Fri 5/22
Cloudy 27% 75° · 51° - Sat 5/23
Partly Cloudy 24% 78° · 54° - Sun 5/24 Cloudy 23% 79° · 56°
- Mon 5/25 Cloudy 29% 79° · 54°
- Tue 5/26 Cloudy 20% 86° · 60°
- Wed 5/27 Drizzle 23% 87° · 64°
- Thu 5/28 Cloudy 37% 76° · 57°
Days 8+ from the Open-Meteo multi-model ensemble — treat as a guide; accuracy drops past day 7.
Best time to head outside
Picks the upcoming daytime hour with the most favorable conditions for each activity. Factors in temperature, wind, precipitation timing, and pollen.
- Run9 AM
comfortable at 59°F · light wind (10 mph) · no rain expected · pollen high today — allergy sufferers, take note
Excellent100 / 100 - Bike10 AM
comfortable at 62°F · light wind (10 mph) · no rain expected · pollen high today — allergy sufferers, take note
Excellent100 / 100 - Golf10 AM
comfortable at 62°F · light wind (10 mph) · no rain expected · pollen high today — allergy sufferers, take note
Excellent100 / 100 - Picnic1 PM
comfortable at 70°F · breezy (15 mph) · no rain expected · pollen high today — allergy sufferers, take note
Excellent100 / 100
Climate normals
What weather to expect in Allentown
Allentown in May typically averages 71° highs and 53° lows, with about 18 days of rain. The hottest stretch is July (average high 87°); the coldest is January (average low 20°).
| Month | Avg high | Avg low | Rainy days |
|---|---|---|---|
| Jan | 32° | 20° | 11 |
| Feb | 37° | 22° | 12 |
| Mar | 55° | 35° | 14 |
| Apr | 64° | 44° | 13 |
| May | 71° | 53° | 18 |
| Jun | 83° | 63° | 14 |
| Jul | 87° | 68° | 17 |
| Aug | 81° | 62° | 14 |
| Sep | 77° | 58° | 9 |
| Oct | 66° | 46° | 8 |
| Nov | 54° | 38° | 11 |
| Dec | 39° | 25° | 14 |
Normals derived from the past two years of observations via Open-Meteo's historical archive.
More for Allentown
Other cities in Pennsylvania