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SunnyDays

ERA5 almanac comparison — 8 years of real data

Costa Rica — Manuel Antonio vs Tulum: weather in June

Essentially a tie in June: Costa Rica — Manuel Antonio is 2% clear historically, Tulum is 6% clear (8-year ERA5 average) — within the noise. Avg high 83°F vs 86°F. Costa Rica — Manuel Antonio also sees measurably more rain than Tulum this month (90% vs 69% of days). Pick based on flight time or price, not weather — the weather won't decide this one for you.

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

Tulum

MX

Clear days, June
6%
Sample size
n=240 days
Avg high
86°F
Early June (1st–15th)
5%
Late June (16th–end)
6%
Rain frequency
69% of days

Compare Costa Rica — Manuel Antonio vs Tulum 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.