Allentown, PA weather in April
April in Allentown: cool, with frequent rain. Highs 63°F, lows 40°F, about 12 wet days and about 0.5 in of snow. A good month for most outdoor plans.
- Normal high
- 63°F
- Normal low
- 40°F
- Wet days
- 12
- 3.7 in total
- Snowfall
- 0.5 in
- normal snowfall
How April changes from start to finish
| April 1 | April 30 | |
|---|---|---|
| Normal high | 57°F | 69°F |
| Normal low | 35°F | 45°F |
| Chance of a wet day | 38% | 39% |
| Sunrise / sunset | 6:45 am / 7:26 pm | 6:01 am / 7:56 pm |
| Daylight | 12.7 h | 13.9 h |
Chance of a wet day: average for the first and last 7 days of the month. Times are local clock time (Eastern Time).
A typical April day
- 6 am43°Fdew point 36°F
- 9 am51°Fdew point 37°F
- Noon58°Fdew point 37°F
- 3 pm60°Fdew point 37°F
- 6 pm58°Fdew point 36°F
- 9 pm52°Fdew point 36°F
NOAA hourly normals (local standard time) from Allentown Intl Airport (4 mi away); average wind 8 mph; clear or few clouds in 51% of daytime hours, mostly cloudy or overcast in 43%.
What kind of days to expect
- Comfortable dayshigh 65-80°F and dew point under 60°F11 of 30
- Hot dayshigh 90°F or more0 of 30
- Muggy daysdaily mean dew point 65°F or more0 of 30
- Wet daysat least 0.01 in of rain or melted snow12 of 30
- Notable rainat least 0.10 in7 of 30
- Freezing nightslow 32°F or below6 of 30
- Snow on the groundsnow depth 1 in or more0 of 30
Average days per April, counted from daily records for each year 1991-2020.
Rain and snow in April
Normal precipitation is 3.7 in; a dry April brings about 2.6 in and a wet one about 5.0 in (25th and 75th percentiles). About 2 days bring half an inch or more, and about 1 an inch or more. Normal snowfall is 0.5 in.
How April varies from year to year
- Warmest April, 1991-20202017: average high 68°F
- Coolest April2007: average high 57°F
- Wettest April1993: 6.8 in
- Driest April1992: 0.9 in
- Highest reading92°F (April 7, 2010)
- Lowest reading20°F (April 6, 2016)
From the station's daily records with NOAA quality flags removed; most recent date shown when a reading repeats.
April compared with March and May
| March | April | May | |
|---|---|---|---|
| Normal high | 51°F | 63°F | 74°F |
| Normal low | 31°F | 40°F | 51°F |
| Wet days | 11 | 12 | 12 |
| Comfortable days | 3 | 11 | 16 |
| Daylight | 12.0 h | 13.3 h | 14.4 h |
Highs change by +12°F from March and +11°F into May.
Nearby alternatives in April
- Warmer: Richmond, VA236 mi · high 70°F · 11 wet days
- Cooler: Bridgeport, CT125 mi · high 58°F · 11 wet days
How Allentown ranks in April
- Normal high231st warmest of 378 cities; 2nd of 4 in Pennsylvania
- Wet days310th driest of 378
- Comfortable days177th most of 340
What to pack for Allentown in April
- A warm jacket – lows near 40°F, highs near 63°F
- A rain jacket or umbrella – rain or snow on about 12 days
Frost in April
The last spring frost typically comes around Apr 20; in 1 year in 10 it comes after May 6. All frost dates for Allentown.
Heating and cooling
April has 403 heating degree days and 8 cooling degree days (base 65°F), 7% of the year's total heating and cooling demand.
Questions
How cold is Allentown in April?
The normal high is 63°F and the normal low is 40°F. From 1991 to 2020 the coldest April reading was 20°F (April 6, 2016).
Does it rain a lot in Allentown in April?
About 12 days in April have at least 0.01 in of precipitation, and the normal total is 3.7 in. The wettest April in 1991-2020 was in 1993 (6.8 in); the driest was in 1992 (0.9 in).
Does it snow in Allentown in April?
Yes. Normal snowfall in April is 0.5 in.
Is April a good time to visit Allentown?
April ranks 3rd of 12 months on our comfort score for Allentown (64 out of 100). It has about 11 comfortable days. The best month is May.
Where the numbers come from
- Temperature, rain, snowfall, snow depth, frost dates, humidity and wind by hour and cloud cover: Allentown Intl Airport (USW00014737), 3.6 mi NE of the city center, 390 ft . NOAA normals and daily records, 1991-2020.
- Daily humidity and wind: Lehigh Valley International Airport (725170-14737), 3.6 mi NE of the city center, 385 ft . Hourly observations, 1991-2020.