ERA5 almanac comparison — 8 years of real data
Savannah vs St. John, USVI: weather in March
Essentially a tie in March: Savannah is 25% clear historically, St. John, USVI is 28% clear (8-year ERA5 average) — within the noise. Avg high 72°F vs 75°F. Pick based on flight time or price, not weather — the weather won't decide this one for you.
Savannah
GA
- Clear days, March
- 25%
- Sample size
- n=248 days
- Avg high
- 72°F
- Early March (1st–15th)
- 19%
- Late March (16th–end)
- 30%
- Rain frequency
- 30% of days
St. John, USVI
VI
- Clear days, March
- 28%
- Sample size
- n=248 days
- Avg high
- 75°F
- Early March (1st–15th)
- 30%
- Late March (16th–end)
- 27%
- Rain frequency
- 26% of days
Frequently asked
Is Savannah or St. John, USVI warmer in March?
St. John, USVI runs warmer by day in March. Savannah averages highs of 72°F (highs n=248 days); St. John, USVI averages highs of 75°F (highs n=248 days) (ERA5 2018–2025). Historical averages, not a forecast.
Does it rain more in Savannah or St. John, USVI in March?
Days with measurable rain: Savannah 30%, St. John, USVI 26% (n=248 and n=248 days). ERA5 2018–2025; historical, not a forecast.
Which is sunnier in March, Savannah or St. John, USVI?
Essentially a tie in March: Savannah is 25% clear historically, St. John, USVI is 28% clear (8-year ERA5 average) — within the noise. Avg high 72°F vs 75°F. Pick based on flight time or price, not weather — the weather won't decide this one for you.
Compare Savannah 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 forecast for any destination is on its own page and may differ from the long-run average. Data from Open-Meteo.