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SunnyDays

ERA5 almanac — 8 years of real data

Aruba in July

Aruba in July: 40% of days see measurable rain, 87°F average high, 22% of days historically clear (n=248, ERA5 2018–2025).

Aruba in July is historically a poor month for sun: only 22% of days clear across 8 years (n=248, avg high 87°F). May is the clearest month for Aruba 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 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 July

Clear-sky percentage for Aruba in July, split by half-month. “n” is the number of days sampled across 8 years (2018–2025).
Period % Clear days Sample (n) Avg high
Early July
1st–15th		 18% n=120 87°F
Late July
16th–end		 25% n=128 87°F
Full month average 22% n=248 87°F

Sunshine & warmth in July

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 July. Primary: % of days ≥ 72°F with > 6 h of sunshine.
Period Warm & sunny (≥72°F, >6 h sun) Sample (n)
Early July
1st–15th		 100% n=120
Late July
16th–end		 100% n=128
Full month average 100% n=248
12.0 h median sunshine per day 99% of days exceed 8 h sunshine 40% of days see ≥ 1 mm rain — rain is not hidden
Comparison (old vs new): WMO-code “clear” bar: 22%. Sunshine-based “warm & sunny”: 100%. The 78-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 July historically: only 22% of days are clear across 8 years (n=248), avg high 87°F. If you want sun in Aruba, May is historically much better. Most visitors this month will see more clouds than sun.

→ See all destinations in May — historically the best month for sun in Aruba.

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 33% n=240 All destinations →
May 39% n=248 All destinations →
June 30% n=240 All destinations →
July ← this page 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 July?

Sometimes. Aruba sees measurable rain on 40% of days in July historically (n=248 days, ERA5 2018–2025) — not frequent enough to plan around, but not negligible either.

Is Aruba good for sun in July?

Not usually. Aruba is historically overcast in July: only 22% of days are clear (avg high 87°F, n=248 days, ERA5 2018–2025). May is historically far better for sun here.

How Aruba compares in July

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.

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.