Allentown/Bethlehem vs Trenton: which is sunnier?
🇺🇸 United States vs 🇺🇸 United States · 68 km apart · long-term climate normals (NASA POWER, 2001–2020)
Trenton is the sunnier overall: about 2,166 hours of sunshine a year to Allentown/Bethlehem's 2,074. Trenton has the higher Sunshine Score in 1 of 12 months; the other 11 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
| Allentown/Bethlehem | Trenton | |
|---|---|---|
| Sunshine hours / year | 2,074 | 2,166 |
| Sunniest month | May (72/100) | May (73/100) |
| Nov–Feb average score | 5/100 | 6/100 |
| Jun–Aug average score | 68/100 | 69/100 |
| Rain / year | 1,234 mm | 1,244 mm |
| Peak midday UV | 7 (high) | 7 (high) |
Allentown/Bethlehem vs Trenton month by month
| Month | Sunshine Score | Day high °C | Rain mm | |||
|---|---|---|---|---|---|---|
| Allentown/Bethlehem | Trenton | Allentown/Bethlehem | Trenton | Allentown/Bethlehem | Trenton | |
| January | 0 | 0 | 2° | 2° | 75 | 78 |
| February | 0 | 0 | 3° | 4° | 74 | 76 |
| March | 6 | 6 | 9° | 9° | 91 | 97 |
| April | 49 | 49 | 16° | 16° | 97 | 100 |
| May | 72 | 73 | 22° | 22° | 104 | 102 |
| June | 68 | 69 | 27° | 27° | 124 | 123 |
| July | 68 | 68 | 30° | 30° | 126 | 126 |
| August | 69 | 69 | 29° | 29° | 118 | 121 |
| September | 69 | 71 | 26° | 26° | 119 | 110 |
| October | 58 | 59 | 18° | 18° | 116 | 115 |
| November | 19 | 25 | 11° | 12° | 86 | 87 |
| December | 0 | 0 | 5° | 5° | 104 | 109 |
The sunnier month by month: Jan even · Feb even · Mar even · Apr even · May even · Jun even · Jul even · Aug even · Sep even · Oct even · Nov Trenton · Dec even.
When to pick which
- November–February: too close to call — Allentown/Bethlehem averages 5/100, Trenton 6/100. Daytime highs are similar (5°C vs 6°C). See the winter sun ranking.
- March–May: too close to call — Allentown/Bethlehem averages 42/100, Trenton 43/100. Daytime highs are similar (16°C vs 16°C).
- June–August: too close to call — Allentown/Bethlehem averages 68/100, Trenton 69/100. Daytime highs are similar (29°C vs 29°C).
- September–October: too close to call — Allentown/Bethlehem averages 64/100, Trenton 65/100. Daytime highs are similar (22°C vs 22°C).
Full month-by-month guides: Allentown/Bethlehem weather by month · Trenton weather by month · Best time to visit United States.
More comparisons: Allentown/Bethlehem vs Philadelphia · Allentown/Bethlehem vs Harrisburg · Allentown/Bethlehem vs Wilkes-Barre/Scranton · Trenton vs New York · Trenton vs Philadelphia · Trenton vs Wilkes-Barre/Scranton · all head-to-heads