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SunnyDays

ERA5 almanac — 8 years of real data

Gulf Shores in August

Gulf Shores in August is historically a poor month for sun: only 14% of days clear across 8 years (n=248, avg high 87°F). October is the clearest month for Gulf Shores 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 Gulf Shores 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 August

Clear-sky percentage for Gulf Shores in August, split by half-month. “n” is the number of days sampled across 8 years (2018–2025).
Period % Clear days Sample (n) Avg high
Early August
1st–15th		 12% n=120 87°F
Late August
16th–end		 16% n=128 87°F
Full month average 14% n=248 87°F

Sunshine & warmth in August

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 Gulf Shores in August. Primary: % of days ≥ 72°F with > 6 h of sunshine.
Period Warm & sunny (≥72°F, >6 h sun) Sample (n)
Early August
1st–15th		 93% n=120
Late August
16th–end		 89% n=128
Full month average 91% n=248
11.8 h median sunshine per day 85% of days exceed 8 h sunshine 62% of days see ≥ 1 mm rain — rain is not hidden
Comparison (old vs new): WMO-code “clear” bar: 14%. Sunshine-based “warm & sunny”: 91%. 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

Gulf Shores is a poor choice for sun in August: just 14% 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 Gulf Shores.

Every month in Gulf Shores

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

Historical clear-sky % for Gulf Shores, all months, ERA5 2018–2025.
Month % Clear Sample (n)
January 0% n=248 All destinations →
February 3% n=226 All destinations →
March 10% n=248 All destinations →
April 30% n=240 All destinations →
May 35% n=248 All destinations →
June 16% n=240 All destinations →
July 9% n=248 All destinations →
August ← this page 14% n=248 All destinations →
September 32% n=240 All destinations →
October 47% n=248 All destinations →
November 22% n=240 All destinations →
December 2% 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.