Allentown weather in April: Allentown, Pennsylvania: normal highs, lows, rain and records for April
Allentown in April has a normal high of 63°F and a normal low of 40°F, a daily mean of 52°F, rising from 57°F on the 1st to 69°F by the 30th. Measurable precipitation falls on 12 days in a normal April, 3.67 inches in all. (NOAA 1991-2020 normals)
In metric: a normal high of 17°C and low of 5°C, 93 mm of precipitation and 1 cm of snow in April.
- NOAA stationAllentown Lehigh Valley International Airport
- Station IDUSW00014737
- Location40.65°N 75.45°W
- Elevation390 ft (119 m)
- From the center4 miles
- Population127,138
- Jan 38° 22°
- Feb 42° 23°
- Mar 51° 31°
- Apr 63° 40°
- May 74° 51°
- Jun 82° 60°
- Jul 86° 65°
- Aug 84° 63°
- Sep 77° 55°
- Oct 66° 44°
- Nov 54° 34°
- Dec 43° 27°
Each month: normal high (large) and low, °F. Fill: the month's normal mean, colder blue to hotter red.
How warm is Allentown in April?
The normal high is 63°F and the normal low 40°F, for a daily mean of 51.8°F. April is 11.1°F warmer than March and 10.2°F cooler than May. April is the 7th warmest month of the year in Allentown and the 7th wettest. Across the month the normal high rises 12°F, from 57°F on April 1 to 69°F on April 30. From one year to the next April's mean temperature typically moves about 2.3°F either way (NOAA's standard deviation), so roughly two Aprils in three average between 50°F and 54°F.
Bars above: each day's normal high to low. Columns below: the chance of 0.01 inch or more of precipitation that day, on a scale of 0 to 100% (highest 40%).
| Day | High | Low | Chance of 0.01 in | Chance of 0.10 in |
|---|---|---|---|---|
| April 1 | 57°F | 35°F | 38% | 23% |
| April 8 | 60°F | 38°F | 39% | 23% |
| April 15 | 63°F | 40°F | 40% | 23% |
| April 22 | 66°F | 43°F | 40% | 23% |
| April 30 | 69°F | 45°F | 39% | 24% |
Every day of April: normal high, low and chance of precipitation (warmest afternoon April 30, coldest night April 1)
| Day | High | Low | Chance of 0.01 in | Chance of 0.10 in | Daylight |
|---|---|---|---|---|---|
| April 1 | 57°F | 35°F | 38% | 23% | 12 h 40 min |
| April 2 | 58°F | 36°F | 38% | 23% | 12 h 40 min |
| April 3 | 58°F | 36°F | 38% | 23% | 12 h 40 min |
| April 4 | 59°F | 36°F | 38% | 23% | 12 h 50 min |
| April 5 | 59°F | 37°F | 38% | 23% | 12 h 50 min |
| April 6 | 59°F | 37°F | 39% | 23% | 12 h 50 min |
| April 7 | 60°F | 37°F | 39% | 23% | 12 h 50 min |
| April 8 | 60°F | 38°F | 39% | 23% | 13 h |
| April 9 | 61°F | 38°F | 39% | 23% | 13 h |
| April 10 | 61°F | 38°F | 39% | 23% | 13 h |
| April 11 | 62°F | 39°F | 39% | 23% | 13 h |
| April 12 | 62°F | 39°F | 40% | 23% | 13 h 10 min |
| April 13 | 63°F | 39°F | 40% | 23% | 13 h 10 min |
| April 14 | 63°F | 40°F | 40% | 23% | 13 h 10 min |
| April 15 | 63°F | 40°F | 40% | 23% | 13 h 10 min |
| April 16 | 64°F | 41°F | 40% | 23% | 13 h 20 min |
| April 17 | 64°F | 41°F | 40% | 23% | 13 h 20 min |
| April 18 | 65°F | 41°F | 40% | 23% | 13 h 20 min |
| April 19 | 65°F | 42°F | 40% | 23% | 13 h 30 min |
| April 20 | 65°F | 42°F | 40% | 23% | 13 h 30 min |
| April 21 | 66°F | 42°F | 40% | 23% | 13 h 30 min |
| April 22 | 66°F | 43°F | 40% | 23% | 13 h 30 min |
| April 23 | 67°F | 43°F | 39% | 23% | 13 h 40 min |
| April 24 | 67°F | 43°F | 39% | 23% | 13 h 40 min |
| April 25 | 67°F | 44°F | 39% | 23% | 13 h 40 min |
| April 26 | 68°F | 44°F | 39% | 23% | 13 h 40 min |
| April 27 | 68°F | 44°F | 39% | 23% | 13 h 40 min |
| April 28 | 68°F | 45°F | 39% | 23% | 13 h 50 min |
| April 29 | 69°F | 45°F | 39% | 23% | 13 h 50 min |
| April 30 | 69°F | 45°F | 39% | 24% | 13 h 50 min |
- Normal high
- 63°FApril average
- Normal low
- 40°FApril average
- Precipitation
- 3.67 inmonth total
- Days with precipitation
- 120.01 inch or more
- Snowfall
- 0.5 inmonth total
- Nights at 32°F or colder
- 6
- Daylight
- 12 h 40 min to 13 h 50 minApril 1 to April 30
- Days at 70°F or more
- 8
- Days at 80°F or more
- 2
- Sunshine
- 70%of clear-sky sunlight (NASA)
Source: NOAA NCEI 1991-2020 daily normals, station USW00014737; monthly normals. Daylight is computed from the place's latitude with NOAA's solar equations.
Does it rain or snow in Allentown in April?
On a given April day the chance of 0.01 inch or more is 39% on average, highest around April 14 (40%). In all, 3.67 in falls on 12 days of a normal April, 1 of them with an inch or more.
In a normal April in Allentown, 6 nights fall to freezing and snowfall averages 0.5 inches.
Source: NOAA NCEI 1991-2020 daily and monthly normals, station USW00014737.
How humid and windy is Allentown in April?
At 3 p.m. the normal temperature is 65°F with 43% relative humidity and a dew point of 42°F; at 6 a.m. it is 48°F with 78% humidity. The wind averages 7.7 mph, most often from the west in the afternoon. A dew point under 50°F feels dry.
| Time | Temperature | Dew point | Humidity | Wind | Clear or few clouds |
|---|---|---|---|---|---|
| 6 a.m. | 48°F | 41°F | 78% | 5.4 mph | 54% |
| 9 a.m. | 57°F | 42°F | 58% | 8.4 mph | 56% |
| noon | 63°F | 42°F | 48% | 9.9 mph | 55% |
| 3 p.m. | 65°F | 42°F | 43% | 10.8 mph | 53% |
| 6 p.m. | 63°F | 42°F | 45% | 9.7 mph | 57% |
| 9 p.m. | 57°F | 42°F | 57% | 6.9 mph | 55% |
Source: NOAA NCEI 1991-2020 hourly normals, station USW00014737. Hourly normals exist only for NOAA's first-order stations; a dash where NOAA publishes no value for that hour (the sky at some hours).
What are the records for April in Allentown?
The warmest April temperature on Allentown's official record (since 1922) is 93°F, on April 18, 1976; the coldest is 12°F, on April 1, 1923. The wettest April brought 10.09 in (1952); the snowiest, 13.4 inches (1982).
The April mean against the 1991-2020 normal of 51.8°F: 2021 51.4°F (−0.4), 2022 49.3°F (−2.5), 2023 53.9°F (+2.1), 2024 52.5°F (+0.7), 2025 52.2°F (+0.4), 2026 53.6°F (+1.8). 4 of 6 ran warmer than normal.
| April | Mean | Against normal | Precip. |
|---|---|---|---|
| 2021 | 51.4°F | −0.4°F | 1.22 in |
| 2022 | 49.3°F | −2.5°F | 5.66 in |
| 2023 | 53.9°F | +2.1°F | 6.00 in |
| 2024 | 52.5°F | +0.7°F | 5.56 in |
| 2025 | 52.2°F | +0.4°F | 2.05 in |
| 2026 | 53.6°F | +1.8°F | 3.00 in |
Source: records: ACIS, NWS threaded record ABEthr; recent months: ACIS, station USW00014737. Records and recent months use complete months only.
How does April in Allentown compare across Pennsylvania?
Across the 108 places PlainClimate covers in Pennsylvania, April normal highs run from 54°F in Laporte to 67°F in Schenley; Allentown's is 63°F.
Source: NOAA NCEI 1991-2020 monthly normals for every station in the state.