Philadelphia vs Allentown/Bethlehem: which is sunnier?
🇺🇸 United States vs 🇺🇸 United States · 88 km apart · long-term climate normals (NASA POWER, 2001–2020)
Philadelphia is the sunnier overall: about 2,267 hours of sunshine a year to Allentown/Bethlehem's 2,074. Philadelphia has the higher Sunshine Score in 5 of 12 months; the other 7 are within 2 points.
Scores are the 0–100 Sunshine Score — sunshine, daytime warmth and dryness in one number, per month.
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At a glance
| Philadelphia | Allentown/Bethlehem | |
|---|---|---|
| Sunshine hours / year | 2,267 | 2,074 |
| Sunniest month | May (74/100) | May (72/100) |
| Nov–Feb average score | 8/100 | 5/100 |
| Jun–Aug average score | 70/100 | 68/100 |
| Rain / year | 1,228 mm | 1,234 mm |
| Peak midday UV | 7 (high) | 7 (high) |
Philadelphia vs Allentown/Bethlehem month by month
| Month | Sunshine Score | Day high °C | Rain mm | |||
|---|---|---|---|---|---|---|
| Philadelphia | Allentown/Bethlehem | Philadelphia | Allentown/Bethlehem | Philadelphia | Allentown/Bethlehem | |
| January | 0 | 0 | 4° | 2° | 78 | 75 |
| February | 0 | 0 | 5° | 3° | 78 | 74 |
| March | 12 | 6 | 10° | 9° | 100 | 91 |
| April | 56 | 49 | 17° | 16° | 97 | 97 |
| May | 74 | 72 | 22° | 22° | 96 | 104 |
| June | 70 | 68 | 27° | 27° | 121 | 124 |
| July | 69 | 68 | 30° | 30° | 124 | 126 |
| August | 70 | 69 | 30° | 29° | 121 | 118 |
| September | 73 | 69 | 26° | 26° | 102 | 119 |
| October | 66 | 58 | 19° | 18° | 110 | 116 |
| November | 31 | 19 | 13° | 11° | 90 | 86 |
| December | 0 | 0 | 7° | 5° | 111 | 104 |
The sunnier month by month: Jan even · Feb even · Mar Philadelphia · Apr Philadelphia · May even · Jun even · Jul even · Aug even · Sep Philadelphia · Oct Philadelphia · Nov Philadelphia · Dec even.
When to pick which
- November–February: Philadelphia (average score 8/100 vs 5). Philadelphia is the warmer, around 7°C daytime highs vs 5°C. See the winter sun ranking.
- March–May: Philadelphia (average score 47/100 vs 42). Daytime highs are similar (16°C vs 16°C).
- June–August: too close to call — Philadelphia averages 70/100, Allentown/Bethlehem 68/100. Daytime highs are similar (29°C vs 29°C).
- September–October: Philadelphia (average score 70/100 vs 64). Daytime highs are similar (23°C vs 22°C).
Full month-by-month guides: Philadelphia weather by month · Allentown/Bethlehem weather by month · Best time to visit United States.
More comparisons: Philadelphia vs Baltimore · Philadelphia vs Trenton · Philadelphia vs Harrisburg · Allentown/Bethlehem vs Trenton · Allentown/Bethlehem vs Harrisburg · Allentown/Bethlehem vs Wilkes-Barre/Scranton · all head-to-heads