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SunnyDays

ERA5 almanac — 8 years of real data

Tampa in January

Tampa in January is historically a poor month for sun: only 23% of days clear across 8 years (n=248, avg high 68°F). April is the clearest month for Tampa 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 Tampa 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 January

Clear-sky percentage for Tampa in January, split by half-month. “n” is the number of days sampled across 8 years (2018–2025).
Period % Clear days Sample (n) Avg high
Early January
1st–15th		 25% n=120 68°F
Late January
16th–end		 22% n=128 68°F
Full month average 23% n=248 68°F

Bottom line

Tampa is mostly overcast in January historically: only 23% of days are clear across 8 years (n=248), avg high 68°F. If you want sun in Tampa, April is historically much better. Most visitors this month will see more clouds than sun.

→ See all destinations in April — historically the best month for sun in Tampa.

Every month in Tampa

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

Historical clear-sky % for Tampa, all months, ERA5 2018–2025.
Month % Clear Sample (n)
January ← this page 23% n=248 All destinations →
February 40% n=226 All destinations →
March 52% n=248 All destinations →
April 54% n=240 All destinations →
May 38% n=248 All destinations →
June 6% n=240 All destinations →
July 2% n=248 All destinations →
August 2% n=248 All destinations →
September 12% n=240 All destinations →
October 41% n=248 All destinations →
November 41% n=240 All destinations →
December 34% 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.