ERA5 almanac — 8 years of real data

30A / Seaside in November

30A / Seaside in November: 27% of days see measurable rain, 70°F average high, 24% of days historically clear (n=240, ERA5 2018–2025).

30A / Seaside in November is historically a poor month for sun: only 24% of days clear across 8 years (n=240, avg high 70°F). October is the clearest month for 30A / Seaside 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 30A / Seaside 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 November

Clear-sky percentage for 30A / Seaside in November, split by half-month. “n” is the number of days sampled across 8 years (2018–2025).
Period	% Clear days	Sample (n)	Avg high
Early November 1st–15th	29%	n=120	70°F
Late November 16th–end	19%	n=120	70°F
Full month average	24%	n=240	70°F

Sunshine & warmth in November

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 30A / Seaside in November. Primary: % of days ≥ 72°F with > 6 h of sunshine.
Period	Warm & sunny (≥72°F, >6 h sun)	Sample (n)
Early November 1st–15th	52%	n=120
Late November 16th–end	32%	n=120
Full month average	42%	n=240

10.2 h median sunshine per day 76% of days exceed 8 h sunshine 27% of days see ≥ 1 mm rain — rain is not hidden

Comparison (old vs new): WMO-code “clear” bar: 24%. Sunshine-based “warm & sunny”: 42%. The 18-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

30A / Seaside is mostly overcast in November historically: only 24% of days are clear across 8 years (n=240), avg high 70°F. If you want sun in 30A / Seaside, October is historically much better. Most visitors this month will see more clouds than sun.

→ See all destinations in October — historically the best month for sun in 30A / Seaside.

Every month in 30A / Seaside

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

Historical clear-sky % for 30A / Seaside, all months, ERA5 2018–2025.
Month	% Clear	Sample (n)
January	1%	n=248	All destinations →
February	5%	n=226	All destinations →
March	12%	n=248	All destinations →
April	41%	n=240	All destinations →
May	42%	n=248	All destinations →
June	16%	n=240	All destinations →
July	9%	n=248	All destinations →
August	12%	n=248	All destinations →
September	32%	n=240	All destinations →
October	51%	n=248	All destinations →
November ← this page	24%	n=240	All destinations →
December	4%	n=248	All destinations →

Frequently asked

Does it rain in 30A / Seaside in November?

Sometimes. 30A / Seaside sees measurable rain on 27% of days in November historically (n=240 days, ERA5 2018–2025) — not frequent enough to plan around, but not negligible either.

Is 30A / Seaside good for sun in November?

Not usually. 30A / Seaside is historically overcast in November: only 24% of days are clear (avg high 70°F, n=240 days, ERA5 2018–2025). October is historically far better for sun here.

How 30A / Seaside compares in November

Head-to-head clear-sky comparisons against destinations travelers plausibly weigh against 30A / Seaside this month — same passport tier, similar flight distance, both sides from the same 8-year ERA5 record.

→ 30A / Seaside vs Jacksonville in November — Jacksonville is 24% clear historically
→ 30A / Seaside vs Turks & Caicos in November — Turks & Caicos is 24% clear historically
→ 30A / Seaside vs Austin in November — Austin is 25% clear historically

→ 30A / Seaside live forecast — this week’s actual 7-day weather, not historical
→ Best destinations in November — all destinations ranked by November 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.