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SunnyDays

ERA5 almanac — 8 years of real data

Destin in March

Destin in March is historically a poor month for sun: only 15% of days clear across 8 years (n=248, avg high 70°F). October is the clearest month for Destin 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 Destin 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 Destin 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		 12% n=120 70°F
Late March
16th–end		 17% n=128 70°F
Full month average 15% n=248 70°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 Destin 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		 31% n=120
Late March
16th–end		 42% n=128
Full month average 37% n=248
11.1 h median sunshine per day 80% of days exceed 8 h sunshine 36% of days see ≥ 1 mm rain — rain is not hidden
Comparison (old vs new): WMO-code “clear” bar: 15%. Sunshine-based “warm & sunny”: 37%. The 22-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

Destin is a poor choice for sun in March: just 15% of days clear historically (n=248). October is the historically strongest month for sun here. The 8-year record is consistent — this is not a fluke bad stretch.

→ See all destinations in October — historically the best month for sun in Destin.

Every month in Destin

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

Historical clear-sky % for Destin, all months, ERA5 2018–2025.
Month % Clear Sample (n)
January 0% n=248 All destinations →
February 7% n=226 All destinations →
March ← this page 15% n=248 All destinations →
April 38% n=240 All destinations →
May 38% n=248 All destinations →
June 14% n=240 All destinations →
July 4% n=248 All destinations →
August 10% n=248 All destinations →
September 33% n=240 All destinations →
October 49% n=248 All destinations →
November 20% n=240 All destinations →
December 4% n=248 All destinations →

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.