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SunnyDays

ERA5 almanac — 8 years of real data

Anguilla in May

Anguilla in May: 35% of days see measurable rain, 81°F average high, 21% of days historically clear (n=248, ERA5 2018–2025).

Anguilla in May is historically a poor month for sun: only 21% of days clear across 8 years (n=248, avg high 81°F). March is the clearest month for Anguilla 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 Anguilla 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 Anguilla 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		 18% n=120 81°F
Late May
16th–end		 24% n=128 81°F
Full month average 21% 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 Anguilla 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		 98% n=120
Late May
16th–end		 97% n=128
Full month average 97% n=248
12.2 h median sunshine per day 97% of days exceed 8 h sunshine 35% of days see ≥ 1 mm rain — rain is not hidden
Comparison (old vs new): WMO-code “clear” bar: 21%. Sunshine-based “warm & sunny”: 97%. The 76-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

Anguilla is mostly overcast in May historically: only 21% of days are clear across 8 years (n=248), avg high 81°F. If you want sun in Anguilla, March is historically much better. Most visitors this month will see more clouds than sun.

→ See all destinations in March — historically the best month for sun in Anguilla.

Every month in Anguilla

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

Historical clear-sky % for Anguilla, all months, ERA5 2018–2025.
Month % Clear Sample (n)
January 17% n=248 All destinations →
February 13% n=226 All destinations →
March 26% n=248 All destinations →
April 22% n=240 All destinations →
May ← this page 21% n=248 All destinations →
June 22% n=240 All destinations →
July 8% n=248 All destinations →
August 13% n=248 All destinations →
September 14% n=240 All destinations →
October 19% n=248 All destinations →
November 18% n=240 All destinations →
December 21% n=248 All destinations →

Frequently asked

Does it rain in Anguilla in May?

Sometimes. Anguilla sees measurable rain on 35% of days in May historically (n=248 days, ERA5 2018–2025) — not frequent enough to plan around, but not negligible either.

Is Anguilla good for sun in May?

Not usually. Anguilla is historically overcast in May: only 21% of days are clear (avg high 81°F, n=248 days, ERA5 2018–2025). March is historically far better for sun here.

How Anguilla compares in May

Head-to-head clear-sky comparisons against destinations travelers plausibly weigh against Anguilla 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.