Allentown/Bethlehem weather by month & the best time to visit
🇺🇸 United States · city break · humid subtropical climate
The best time to visit Allentown/Bethlehem is May — its sunniest month (Sunshine Score 72/100), with August and September close behind. Allentown/Bethlehem averages about 2,074 hours of sunshine a year. Daytime highs around 22°C / 72°F and roughly 104 mm of rain in May.
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- Sun hours / year
- 2,074
- Sunniest month
- May
- Peak score
- 72/100
- Rain / year
- 1,234 mm
- Snow / year
- ≈1.5 m
- Midday UV at peak
- 7 (high)
- Population
- 496k
- Elevation
- 117 m
When is the best time to visit Allentown/Bethlehem?
For sunshine, the best time to visit Allentown/Bethlehem is May, then August and September. The dullest month is January (0/100, 75 mm of rain). The full month-by-month picture is in the table below.
How sunny is Allentown/Bethlehem?
Allentown/Bethlehem gets a moderate 2,074 hours of sunshine a year. 72 Sunshine Score points separate May (72) from January (0), so the month you pick matters. It ranks #375 of 580 destinations in United States for annual sunshine, below the national median of 2,279 hours. The year's 1,234 mm of rain spreads fairly evenly across the months, with no pronounced dry season.
Sunshine Score by month
| Month | Score | Day high | Night low | Rain | UV |
|---|---|---|---|---|---|
| January | 0 | 2° / 36°F | -6° / 21°F | 75 mm | 1 |
| February | 0 | 3° / 37°F | -6° / 21°F | 74 mm | 2 |
| March | 6 | 9° / 48°F | -2° / 28°F | 91 mm | 3 |
| April | 49 | 16° / 61°F | 4° / 39°F | 97 mm | 5 |
| May | 72 | 22° / 72°F | 10° / 50°F | 104 mm | 6 |
| June | 68 | 27° / 81°F | 16° / 61°F | 124 mm | 7 |
| July | 68 | 30° / 86°F | 19° / 66°F | 126 mm | 7 |
| August | 69 | 29° / 84°F | 18° / 64°F | 118 mm | 6 |
| September | 69 | 26° / 79°F | 14° / 57°F | 119 mm | 5 |
| October | 58 | 18° / 64°F | 7° / 45°F | 116 mm | 3 |
| November | 19 | 11° / 52°F | 1° / 34°F | 86 mm | 2 |
| December | 0 | 5° / 41°F | -3° / 27°F | 104 mm | 1 |
See Allentown/Bethlehem on the interactive sunshine globe →
Nearby places for sunshine
- Trenton United States · 68 km · best in May · 2,166 h sun/yr
- Wilkes-Barre/Scranton United States · 80 km · best in May · 1,919 h sun/yr
- Philadelphia United States · 88 km · best in May · 2,267 h sun/yr
- Harrisburg United States · 123 km · best in May · 2,080 h sun/yr
- New York United States · 140 km · best in Sep · 2,252 h sun/yr
- Atlantic City United States · 152 km · best in Sep · 2,260 h sun/yr
Nearest destinations
- Lancaster United States · 93 km · 2,080 h sun/yr · best in May
- Teterboro United States · 118 km · 2,167 h sun/yr · best in May
Head-to-head
How Allentown/Bethlehem compares month by month: Allentown/Bethlehem vs Philadelphia · Allentown/Bethlehem vs Trenton · Allentown/Bethlehem vs Harrisburg · Allentown/Bethlehem vs Wilkes-Barre/Scranton · all comparisons
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