Allentown
United States · North America
Year-round range: 24°F to 85°F
May
Excellent conditions this month
Your monthly fit score
Comfort fit by month.
Climate details▼
Temperature
Average highs and lows.
May has comfortable temperatures — not too hot, not too cold.
Shaded band = typical daily swing (P10 of night lows to P90 of afternoon peaks) — spans wider than avg high/low lines because it captures day-to-day variation.
| = MayPrecipitation
Monthly precipitation, wet-day risk, and snow signal where relevant.
May is one of the wetter months — pack rain gear.
Sunshine
Average hours of bright sun per day.
May has decent sunshine — a mix of sun and cloud.
Air comfort by month
Humidity and heat feel by month.
May is mostly comfortable — low heat and humidity pressure.
Time-of-day patterns
Typical hourly rhythm for May.
Temperature by hour
Temperature by hour and month
Typical temperature through the day across the year (1996-2025 normals, local time). Shaded cells are nighttime.
In May, afternoons reach about 71° and nights settle near 54°.
▶Full month-by-month data
| Month | High °F | Low °F | Rain days | Rain (in) | Sun h/day | Humidity |
|---|---|---|---|---|---|---|
| Jan | 38°F | 24°F | 9 | 3.4in | 4.6h | 66.14285714285714% |
| Feb | 41°F | 25°F | 9 | 3.0in | 5.4h | 64.28571428571428% |
| Mar | 50°F | 32°F | 10 | 4.0in | 6h | 63.42857142857142% |
| Apr | 62°F | 42°F | 10 | 3.9in | 6.6h | 63.57142857142856% |
| May | 71°F | 51°F | 11 | 3.8in | 7.1h | 67% |
| Jun | 80°F | 61°F | 11 | 4.0in | 7.8h | 67.14285714285714% |
| Jul | 85°F | 66°F | 11 | 3.9in | 8.4h | 66.85714285714285% |
| Aug | 83°F | 65°F | 10 | 3.8in | 7.9h | 66.85714285714285% |
| Sep | 76°F | 58°F | 9 | 4.3in | 7.2h | 68.85714285714285% |
| Oct | 64°F | 47°F | 8 | 3.8in | 6.5h | 71.28571428571428% |
| Nov | 52°F | 37°F | 8 | 3.1in | 5.4h | 68.71428571428571% |
| Dec | 42°F | 29°F | 9 | 4.0in | 4.4h | 69.42857142857143% |
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Planning notes
Expect some rain.