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SunnyDays

ERA5 almanac — 8 years of real data

Phoenix in November

Phoenix in November is a mixed month for sun: 63% of days historically clear (n=240, avg high 77°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 Phoenix 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 Phoenix 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		 78% n=120 77°F
Late November
16th–end		 48% n=120 77°F
Full month average 63% n=240 77°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 Phoenix 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		 81% n=120
Late November
16th–end		 50% n=120
Full month average 66% n=240
9.8 h median sunshine per day 88% of days exceed 8 h sunshine 7% of days see ≥ 1 mm rain — rain is not hidden
Comparison (old vs new): WMO-code “clear” bar: 63%. Sunshine-based “warm & sunny”: 66%.

Bottom line

Phoenix clears solidly in November: 63% of days historically (n=240), avg high 77°F. The two halves differ materially (78% early, 48% late) — favour the early half of the month. Most trips here in November will find more sun than cloud.

Every month in Phoenix

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

Historical clear-sky % for Phoenix, all months, ERA5 2018–2025.
Month % Clear Sample (n)
January 17% n=248 All destinations →
February 41% n=226 All destinations →
March 61% n=248 All destinations →
April 94% n=240 All destinations →
May 95% n=248 All destinations →
June 94% n=240 All destinations →
July 76% n=248 All destinations →
August 76% n=248 All destinations →
September 82% n=240 All destinations →
October 85% n=248 All destinations →
November ← this page 63% n=240 All destinations →
December 22% 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.