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SunnyDays

ERA5 almanac comparison — 8 years of real data

Costa Rica — Manuel Antonio vs Turks & Caicos: weather in September

Turks & Caicos edges out Costa Rica — Manuel Antonio for sun in September: 16% clear historically versus 0% (8-year ERA5 average, a 16-point gap). Costa Rica — Manuel Antonio also sees measurably more rain than Turks & Caicos this month (92% vs 50% of days). Both are viable — Turks & Caicos is the safer bet.

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

Costa Rica — Manuel Antonio

CR

Clear days, September
0%
Sample size
n=240 days
Avg high
83°F
Early September (1st–15th)
0%
Late September (16th–end)
0%
Rain frequency
92% of days

Turks & Caicos

TC

Clear days, September
16%
Sample size
n=240 days
Avg high
85°F
Early September (1st–15th)
19%
Late September (16th–end)
13%
Rain frequency
50% of days

Compare Costa Rica — Manuel Antonio vs Turks & Caicos 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.