ERA5 almanac — 8 years of real data

Nassau in April

Nassau in April: 44% of days see measurable rain, 80°F average high, 30% of days historically clear (n=240, ERA5 2018–2025).

Nassau in April is historically a poor month for sun: only 30% of days clear across 8 years (n=240, avg high 80°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 Nassau 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 Nassau 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	31%	n=120	80°F
Late April 16th–end	30%	n=120	80°F
Full month average	30%	n=240	80°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 Nassau 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	98%	n=120
Late April 16th–end	99%	n=120
Full month average	98%	n=240

12.1 h median sunshine per day 97% of days exceed 8 h sunshine 44% of days see ≥ 1 mm rain — rain is not hidden

Comparison (old vs new): WMO-code “clear” bar: 30%. Sunshine-based “warm & sunny”: 98%. The 68-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

Nassau is mostly overcast in April historically: only 30% of days are clear across 8 years (n=240), avg high 80°F. Most visitors this month will see more clouds than sun.

Every month in Nassau

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

Historical clear-sky % for Nassau, all months, ERA5 2018–2025.
Month	% Clear	Sample (n)
January	32%	n=248	All destinations →
February	34%	n=226	All destinations →
March	40%	n=248	All destinations →
April ← this page	30%	n=240	All destinations →
May	20%	n=248	All destinations →
June	6%	n=240	All destinations →
July	6%	n=248	All destinations →
August	8%	n=248	All destinations →
September	6%	n=240	All destinations →
October	14%	n=248	All destinations →
November	28%	n=240	All destinations →
December	33%	n=248	All destinations →

Frequently asked

Does it rain in Nassau in April?

Sometimes. Nassau sees measurable rain on 44% of days in April historically (n=240 days, ERA5 2018–2025) — not frequent enough to plan around, but not negligible either.

Is Nassau good for sun in April?

It's mixed. Nassau in April is clear on 30% of days historically (avg high 80°F, n=240 days, ERA5 2018–2025) — the outcome varies year to year.

How Nassau compares in April

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

→ Nassau vs Gulf Shores in April — Gulf Shores is 30% clear historically
→ Nassau vs Tulum in April — Tulum is 30% clear historically
→ Nassau vs Fort Lauderdale in April — Fort Lauderdale is 29% clear historically

→ Nassau 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.