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SunnyDays

ERA5 almanac — 8 years of real data

Amelia Island in June

Amelia Island in June is historically a poor month for sun: only 18% of days clear across 8 years (n=240, avg high 86°F). April is the clearest month for Amelia Island 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 Amelia Island 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 June

Clear-sky percentage for Amelia Island in June, split by half-month. “n” is the number of days sampled across 8 years (2018–2025).
Period % Clear days Sample (n) Avg high
Early June
1st–15th		 16% n=120 86°F
Late June
16th–end		 19% n=120 86°F
Full month average 18% n=240 86°F

Sunshine & warmth in June

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 Amelia Island in June. Primary: % of days ≥ 72°F with > 6 h of sunshine.
Period Warm & sunny (≥72°F, >6 h sun) Sample (n)
Early June
1st–15th		 93% n=120
Late June
16th–end		 97% n=120
Full month average 95% n=240
12.1 h median sunshine per day 88% of days exceed 8 h sunshine 64% of days see ≥ 1 mm rain — rain is not hidden
Comparison (old vs new): WMO-code “clear” bar: 18%. Sunshine-based “warm & sunny”: 95%. The 77-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

Amelia Island is a poor choice for sun in June: just 18% of days clear historically (n=240). April 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 April — historically the best month for sun in Amelia Island.

Every month in Amelia Island

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

Historical clear-sky % for Amelia Island, all months, ERA5 2018–2025.
Month % Clear Sample (n)
January 7% n=248 All destinations →
February 22% n=226 All destinations →
March 25% n=248 All destinations →
April 46% n=240 All destinations →
May 38% n=248 All destinations →
June ← this page 18% n=240 All destinations →
July 10% n=248 All destinations →
August 9% n=248 All destinations →
September 22% n=240 All destinations →
October 34% n=248 All destinations →
November 20% n=240 All destinations →
December 12% 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.