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SunnyDays

ERA5 almanac comparison — 8 years of real data

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

San Antonio edges out Costa Rica — Manuel Antonio for sun in June: 31% clear historically versus 2% (8-year ERA5 average, a 29-point gap). Costa Rica — Manuel Antonio also sees measurably more rain than San Antonio this month (90% vs 36% 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 June. For this week’s actual forecast, each destination links to its live page below.

Costa Rica — Manuel Antonio

CR

Clear days, June
2%
Sample size
n=240 days
Avg high
83°F
Early June (1st–15th)
1%
Late June (16th–end)
3%
Rain frequency
90% of days

San Antonio

TX

Clear days, June
31%
Sample size
n=240 days
Avg high
94°F
Early June (1st–15th)
32%
Late June (16th–end)
30%
Rain frequency
36% 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.