ERA5 almanac — 8 years of real data

Nassau in March

Nassau in March: rain frequency data not yet backfilled for this month, 79°F average high, 40% of days historically clear (n=248, ERA5 2018–2025).

Nassau in March is a mixed month for sun: 40% of days historically clear (n=248, avg high 79°F). The outcome varies year to year — check the early/late split below. 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 March

Clear-sky percentage for Nassau in March, split by half-month. “n” is the number of days sampled across 8 years (2018–2025).
Period	% Clear days	Sample (n)	Avg high
Early March 1st–15th	36%	n=120	79°F
Late March 16th–end	44%	n=128	79°F
Full month average	40%	n=248	79°F

Bottom line

Nassau in March is genuinely mixed: 40% of days historically clear (n=248), avg high 79°F — more cloudy than clear. The outcome varies year to year; don't book if you need guaranteed 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 ← this page	40%	n=248	All destinations →
April	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

Is Nassau good for sun in March?

It's mixed. Nassau in March is clear on 40% of days historically (avg high 79°F, n=248 days, ERA5 2018–2025) — the outcome varies year to year.

→ Nassau live forecast — this week’s actual 7-day weather, not historical
→ Best destinations in March — all destinations ranked by March 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.