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SunnyDays

ERA5 almanac — 8 years of real data

Naples in November

Naples in November is a mixed month for sun: 44% of days historically clear (n=240, avg high 81°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 Naples 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 Naples 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		 34% n=120 81°F
Late November
16th–end		 54% n=120 81°F
Full month average 44% n=240 81°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 Naples 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		 88% n=120
Late November
16th–end		 87% n=120
Full month average 88% n=240
10.2 h median sunshine per day 86% of days exceed 8 h sunshine 30% of days see ≥ 1 mm rain — rain is not hidden
Comparison (old vs new): WMO-code “clear” bar: 44%. Sunshine-based “warm & sunny”: 88%. The 44-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

Naples in November is genuinely mixed: 44% of days historically clear (n=240), avg high 81°F — more cloudy than clear. The two halves differ materially (34% early, 54% late) — favour the late half of the month. The outcome varies year to year; don't book if you need guaranteed sun.

Every month in Naples

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

Historical clear-sky % for Naples, all months, ERA5 2018–2025.
Month % Clear Sample (n)
January 35% n=248 All destinations →
February 41% n=226 All destinations →
March 48% n=248 All destinations →
April 41% n=240 All destinations →
May 28% n=248 All destinations →
June 7% n=240 All destinations →
July 4% n=248 All destinations →
August 2% n=248 All destinations →
September 9% n=240 All destinations →
October 23% n=248 All destinations →
November ← this page 44% n=240 All destinations →
December 45% 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.