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SunnyDays

ERA5 almanac — 8 years of real data

Exuma in May

Exuma in May: 41% of days see measurable rain, 81°F average high, 27% of days historically clear (n=248, ERA5 2018–2025).

Exuma in May is historically a poor month for sun: only 27% of days clear across 8 years (n=248, avg high 81°F). April is the clearest month for Exuma historically. Historical average, not a forecast.

What you are reading: 8-year historical averages from the ERA5 reanalysis, not a forecast. A month that is historically 90% clear can still be overcast on your specific trip. For this week’s actual forecast, see the live Exuma page. Both can be true at once: “historically strong in this month; this particular week is not.” We label which is which.

Early vs. Late May

Clear-sky percentage for Exuma in May, split by half-month. “n” is the number of days sampled across 8 years (2018–2025).
Period % Clear days Sample (n) Avg high
Early May
1st–15th		 22% n=120 81°F
Late May
16th–end		 31% n=128 81°F
Full month average 27% n=248 81°F

Sunshine & warmth in May

A second measure using actual sunshine hours (ERA5 sunshine_duration), not the daily weather code. A Lowcountry day with 12 hours of sun and a 25-minute afternoon storm is counted below as a warm, sunny day — because it was. How we define this.

Sunshine-based metrics for Exuma in May. Primary: % of days ≥ 72°F with > 6 h of sunshine.
Period Warm & sunny (≥72°F, >6 h sun) Sample (n)
Early May
1st–15th		 93% n=120
Late May
16th–end		 93% n=128
Full month average 93% n=248
12.2 h median sunshine per day 90% of days exceed 8 h sunshine 41% of days see ≥ 1 mm rain — rain is not hidden
Comparison (old vs new): WMO-code “clear” bar: 27%. Sunshine-based “warm & sunny”: 93%. The 66-point gap is from brief afternoon convective storms that stamp the whole day as “rain” in the WMO code but leave the bulk of the sunshine untouched.

Bottom line

Exuma is mostly overcast in May historically: only 27% of days are clear across 8 years (n=248), avg high 81°F. If you want sun in Exuma, April is historically much better. Most visitors this month will see more clouds than sun.

→ See all destinations in April — historically the best month for sun in Exuma.

Every month in Exuma

Compare across all months with data. Numbers are historical clear-sky %.

Historical clear-sky % for Exuma, all months, ERA5 2018–2025.
Month % Clear Sample (n)
January 38% n=248 All destinations →
February 39% n=226 All destinations →
March 45% n=248 All destinations →
April 46% n=240 All destinations →
May ← this page 27% n=248 All destinations →
June 20% n=240 All destinations →
July 25% n=248 All destinations →
August 18% n=248 All destinations →
September 20% n=240 All destinations →
October 12% n=248 All destinations →
November 25% n=240 All destinations →
December 37% n=248 All destinations →

Frequently asked

Does it rain in Exuma in May?

Sometimes. Exuma sees measurable rain on 41% of days in May historically (n=248 days, ERA5 2018–2025) — not frequent enough to plan around, but not negligible either.

Is Exuma good for sun in May?

Not usually. Exuma is historically overcast in May: only 27% of days are clear (avg high 81°F, n=248 days, ERA5 2018–2025). April is historically far better for sun here.

How Exuma compares in May

Head-to-head clear-sky comparisons against destinations travelers plausibly weigh against Exuma this month — same passport tier, similar flight distance, both sides from the same 8-year ERA5 record.

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.