ERA5 almanac comparison — 8 years of real data
Costa Rica — Guanacaste vs Savannah: weather in October
Savannah is the clear winner for sun in October: 47% of days historically clear versus just 2% in Costa Rica — Guanacaste — a 45-point gap across 8 years of ERA5 data. Costa Rica — Guanacaste also sees measurably more rain than Savannah this month (95% vs 24% of days). This isn't close.
Costa Rica — Guanacaste
Costa Rica
- Clear days, October
- 2%
- Sample size
- n=248 days
- Avg high
- 86°F
- Early October (1st–15th)
- 0%
- Late October (16th–end)
- 3%
- Rain frequency
- 95% of days
Savannah
GA
- Clear days, October
- 47%
- Sample size
- n=248 days
- Avg high
- 78°F
- Early October (1st–15th)
- 48%
- Late October (16th–end)
- 47%
- Rain frequency
- 24% of days
Frequently asked
Is Costa Rica — Guanacaste or Savannah warmer in October?
Costa Rica — Guanacaste runs warmer by day in October. Costa Rica — Guanacaste averages highs of 86°F (highs n=248 days); Savannah averages highs of 78°F (highs n=248 days) (ERA5 2018–2025). Historical averages, not a forecast.
Does it rain more in Costa Rica — Guanacaste or Savannah in October?
Costa Rica — Guanacaste is measurably wetter than Savannah. Days with measurable rain: Costa Rica — Guanacaste 95%, Savannah 24% (n=248 and n=248 days). ERA5 2018–2025; historical, not a forecast.
Which is sunnier in October, Costa Rica — Guanacaste or Savannah?
Savannah is the clear winner for sun in October: 47% of days historically clear versus just 2% in Costa Rica — Guanacaste — a 45-point gap across 8 years of ERA5 data. Costa Rica — Guanacaste also sees measurably more rain than Savannah this month (95% vs 24% of days). This isn't close.
Compare Costa Rica — Guanacaste vs Savannah 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.