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SunnyDays

ERA5 almanac — 8 years of real data

Anguilla in January

Anguilla in January: 39% of days see measurable rain, 79°F average high, 17% of days historically clear (n=248, ERA5 2018–2025).

Anguilla in January is historically a poor month for sun: only 17% of days clear across 8 years (n=248, avg high 79°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 January

Clear-sky percentage for Anguilla in January, split by half-month. “n” is the number of days sampled across 8 years (2018–2025).
Period % Clear days Sample (n) Avg high
Early January
1st–15th		 14% n=120 79°F
Late January
16th–end		 20% n=128 79°F
Full month average 17% n=248 79°F

Sunshine & warmth in January

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 January. Primary: % of days ≥ 72°F with > 6 h of sunshine.
Period Warm & sunny (≥72°F, >6 h sun) Sample (n)
Early January
1st–15th		 100% n=120
Late January
16th–end		 100% n=128
Full month average 100% n=248
10.9 h median sunshine per day 100% of days exceed 8 h sunshine 39% of days see ≥ 1 mm rain — rain is not hidden
Comparison (old vs new): WMO-code “clear” bar: 17%. Sunshine-based “warm & sunny”: 100%. The 83-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 a poor choice for sun in January: just 17% of days clear historically (n=248). March is the historically strongest month for sun here. The 8-year record is consistent — this is not a fluke bad stretch.

→ 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 ← this page 17% n=248 All destinations →
February 13% n=226 All destinations →
March 26% n=248 All destinations →
April 22% n=240 All destinations →
May 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 January?

Sometimes. Anguilla sees measurable rain on 39% of days in January historically (n=248 days, ERA5 2018–2025) — not frequent enough to plan around, but not negligible either.

Is Anguilla good for sun in January?

Not usually. Anguilla is historically overcast in January: only 17% of days are clear (avg high 79°F, n=248 days, ERA5 2018–2025). March is historically far better for sun here.

How Anguilla compares in January

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.