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SunnyDays

ERA5 almanac comparison — 8 years of real data

Costa Rica — Manuel Antonio vs Jamaica: weather in March

Costa Rica — Manuel Antonio edges out Jamaica for sun in March: 34% clear historically versus 21% (8-year ERA5 average, a 13-point gap). Jamaica also sees measurably more rain than Costa Rica — Manuel Antonio this month (50% vs 21% of days). Both are viable — Costa Rica — Manuel Antonio is the safer bet.

What you are reading: 8-year historical averages, not a forecast. Either destination can still surprise you this specific March. For this week’s actual forecast, each destination links to its live page below.

Costa Rica — Manuel Antonio

CR

Clear days, March
34%
Sample size
n=248 days
Avg high
88°F
Early March (1st–15th)
40%
Late March (16th–end)
28%
Rain frequency
21% of days

Jamaica

JM

Clear days, March
21%
Sample size
n=248 days
Avg high
83°F
Early March (1st–15th)
18%
Late March (16th–end)
23%
Rain frequency
50% of days

Compare Costa Rica — Manuel Antonio vs Jamaica 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.