ERA5 almanac — 8 years of real data

Aruba in April

Aruba in April: 24% of days see measurable rain, 86°F average high, 33% of days historically clear (n=240, ERA5 2018–2025).

Aruba in April is historically a poor month for sun: only 33% of days clear across 8 years (n=240, avg high 86°F). 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 Aruba 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 April

Clear-sky percentage for Aruba in April, split by half-month. “n” is the number of days sampled across 8 years (2018–2025).
Period	% Clear days	Sample (n)	Avg high
Early April 1st–15th	40%	n=120	86°F
Late April 16th–end	26%	n=120	86°F
Full month average	33%	n=240	86°F

Sunshine & warmth in April

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 Aruba in April. Primary: % of days ≥ 72°F with > 6 h of sunshine.
Period	Warm & sunny (≥72°F, >6 h sun)	Sample (n)
Early April 1st–15th	100%	n=120
Late April 16th–end	99%	n=120
Full month average	100%	n=240

11.8 h median sunshine per day 98% of days exceed 8 h sunshine 24% of days see ≥ 1 mm rain — rain is not hidden

Comparison (old vs new): WMO-code “clear” bar: 33%. Sunshine-based “warm & sunny”: 100%. The 67-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

Aruba is mostly overcast in April historically: only 33% of days are clear across 8 years (n=240), avg high 86°F. Most visitors this month will see more clouds than sun.

Every month in Aruba

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

Historical clear-sky % for Aruba, all months, ERA5 2018–2025.
Month	% Clear	Sample (n)
January	24%	n=248	All destinations →
February	22%	n=226	All destinations →
March	33%	n=248	All destinations →
April ← this page	33%	n=240	All destinations →
May	39%	n=248	All destinations →
June	30%	n=240	All destinations →
July	22%	n=248	All destinations →
August	24%	n=248	All destinations →
September	32%	n=240	All destinations →
October	14%	n=248	All destinations →
November	6%	n=240	All destinations →
December	12%	n=248	All destinations →

Frequently asked

Does it rain in Aruba in April?

Sometimes. Aruba sees measurable rain on 24% of days in April historically (n=240 days, ERA5 2018–2025) — not frequent enough to plan around, but not negligible either.

Is Aruba good for sun in April?

It's mixed. Aruba in April is clear on 33% of days historically (avg high 86°F, n=240 days, ERA5 2018–2025) — the outcome varies year to year.

How Aruba compares in April

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

→ Aruba vs Costa Rica — Guanacaste in April — Costa Rica — Guanacaste is 33% clear historically
→ Aruba vs New Orleans in April — New Orleans is 34% clear historically
→ Aruba vs Palm Beach in April — Palm Beach is 32% clear historically

→ Aruba live forecast — this week’s actual 7-day weather, not historical
→ Best destinations in April — all destinations ranked by April clear-sky %
→ All destinations
→ Raw data (JSON) — buckets, n, source

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.