Skip to main content
SunnyDays

ERA5 almanac — 8 years of real data

Nassau in March

Nassau in March: 29% of days see measurable rain, 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

Sunshine & warmth in March

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 March. Primary: % of days ≥ 72°F with > 6 h of sunshine.
Period Warm & sunny (≥72°F, >6 h sun) Sample (n)
Early March
1st–15th		 97% n=120
Late March
16th–end		 97% n=128
Full month average 97% n=248
11.4 h median sunshine per day 94% of days exceed 8 h sunshine 29% of days see ≥ 1 mm rain — rain is not hidden
Comparison (old vs new): WMO-code “clear” bar: 40%. Sunshine-based “warm & sunny”: 97%. The 57-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 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

Does it rain in Nassau in March?

Sometimes. Nassau sees measurable rain on 29% of days in March historically (n=248 days, ERA5 2018–2025) — not frequent enough to plan around, but not negligible either.

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.

How Nassau compares in March

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.

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.