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SunnyDays

ERA5 almanac comparison — 8 years of real data

Costa Rica — Manuel Antonio vs San Antonio: weather in April

San Antonio edges out Costa Rica — Manuel Antonio for sun in April: 36% clear historically versus 8% (8-year ERA5 average, a 28-point gap). Costa Rica — Manuel Antonio also sees measurably more rain than San Antonio this month (63% vs 40% of days). Both are viable — San Antonio 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.

Costa Rica — Manuel Antonio

CR

Clear days, April
8%
Sample size
n=240 days
Avg high
86°F
Early April (1st–15th)
14%
Late April (16th–end)
3%
Rain frequency
63% of days

San Antonio

TX

Clear days, April
36%
Sample size
n=240 days
Avg high
82°F
Early April (1st–15th)
40%
Late April (16th–end)
33%
Rain frequency
40% of days
See this week’s live forecast →

Compare Costa Rica — Manuel Antonio vs San Antonio 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.