San Juan vs Charlotte Amalie: which is sunnier?
🇵🇷 Puerto Rico vs 🇻🇮 U.S. Virgin Islands · 109 km apart · long-term climate normals (NASA POWER, 2001–2020)
Charlotte Amalie is the sunnier overall: about 3,108 hours of sunshine a year to San Juan's 2,619. Charlotte Amalie has the higher Sunshine Score in 12 of 12 months — a clean sweep.
Scores are the 0–100 Sunshine Score — sunshine, daytime warmth and dryness in one number, per month.
At a glance
| San Juan | Charlotte Amalie | |
|---|---|---|
| Sunshine hours / year | 2,619 | 3,108 |
| Sunniest month | February (86/100) | February (92/100) |
| Nov–Feb average score | 81/100 | 86/100 |
| Jun–Aug average score | 75/100 | 81/100 |
| Rain / year | 1,207 mm | 1,003 mm |
| Warmest sea | 31°C / 88°F | 31°C / 88°F |
| Peak midday UV | 10 (very high) | 12 (extreme) |
San Juan vs Charlotte Amalie month by month
| Month | Sunshine Score | Day high °C | Rain mm | Sea °C | ||||
|---|---|---|---|---|---|---|---|---|
| San Juan | Charlotte Amalie | San Juan | Charlotte Amalie | San Juan | Charlotte Amalie | San Juan | Charlotte Amalie | |
| January | 85 | 90 | 28° | 26° | 51 | 40 | 27° | 27° |
| February | 86 | 92 | 28° | 26° | 45 | 29 | 27° | 27° |
| March | 83 | 91 | 28° | 26° | 61 | 38 | 27° | 27° |
| April | 80 | 88 | 29° | 27° | 77 | 54 | 27° | 28° |
| May | 71 | 79 | 30° | 28° | 129 | 99 | 29° | 29° |
| June | 78 | 84 | 30° | 28° | 90 | 73 | 30° | 30° |
| July | 76 | 81 | 30° | 29° | 100 | 88 | 30° | 30° |
| August | 71 | 77 | 30° | 29° | 130 | 113 | 30° | 30° |
| September | 67 | 71 | 30° | 29° | 162 | 146 | 30° | 30° |
| October | 67 | 71 | 30° | 29° | 161 | 142 | 31° | 31° |
| November | 69 | 75 | 29° | 28° | 137 | 122 | 30° | 29° |
| December | 83 | 87 | 28° | 27° | 64 | 59 | 29° | 28° |
The sunnier month by month: Jan Charlotte Amalie · Feb Charlotte Amalie · Mar Charlotte Amalie · Apr Charlotte Amalie · May Charlotte Amalie · Jun Charlotte Amalie · Jul Charlotte Amalie · Aug Charlotte Amalie · Sep Charlotte Amalie · Oct Charlotte Amalie · Nov Charlotte Amalie · Dec Charlotte Amalie.
When to pick which
- November–February: Charlotte Amalie (average score 86/100 vs 81). Daytime highs are similar (28°C vs 27°C). See the winter sun ranking.
- March–May: Charlotte Amalie (average score 86/100 vs 78). San Juan is the warmer, around 29°C daytime highs vs 27°C.
- June–August: Charlotte Amalie (average score 81/100 vs 75). Daytime highs are similar (30°C vs 29°C).
- September–October: Charlotte Amalie (average score 71/100 vs 67). Daytime highs are similar (30°C vs 29°C).
Sea temperature
Both seas peak at 31°C / 88°F. Swimmable water (21°C+): San Juan all year, Charlotte Amalie all year. Month-by-month sea temperatures are in the table above.
Full month-by-month guides: San Juan weather by month · Charlotte Amalie weather by month.
More comparisons: San Juan vs Punta Cana · San Juan vs Christiansted · Charlotte Amalie vs Sint Maarten · Charlotte Amalie vs Christiansted · all head-to-heads