ERA5 almanac comparison — 8 years of real data
Jacksonville vs St. John, USVI: weather in April
Jacksonville edges out St. John, USVI for sun in April: 48% clear historically versus 20% (8-year ERA5 average, a 28-point gap). Both are viable — Jacksonville is the safer bet.
What you are reading: 8-year historical averages, not a forecast.
Either destination can still surprise you this specific April. For this
week’s actual forecast, each destination links to its live page below.
Jacksonville
FL
- Clear days, April
- 48%
- Sample size
- n=240 days
- Avg high
- 79°F
- Early April (1st–15th)
- 38%
- Late April (16th–end)
- 59%
- Rain frequency
- 28% of days
St. John, USVI
VI
- Clear days, April
- 20%
- Sample size
- n=240 days
- Avg high
- 76°F
- Early April (1st–15th)
- 22%
- Late April (16th–end)
- 18%
- Rain frequency
- 37% of days
Compare Jacksonville vs St. John, USVI in another month
All percentages are historical averages from the ERA5 reanalysis via Open-Meteo, 8 full years (2018–2025). “Clear” means avg high ≥ 72 °F, precipitation < 1 mm, and a non-precipitation weather code. This is history, not a forecast. The live 7-day outlook for any destination is on its own page and may differ from the long-run average. Data from Open-Meteo.