ERA5 almanac comparison — 8 years of real data
Florence vs London: weather in October
Florence edges out London for sun in October: 29% clear historically versus 2% (8-year ERA5 average, a 27-point gap). Both are viable — Florence is the safer bet.
What you are reading: 8-year historical averages, not a forecast.
Either destination can still surprise you this specific October. For this
week’s actual forecast, each destination links to its live page below.
Florence
IT
- Clear days, October
- 29%
- Sample size
- n=248 days
- Avg high
- 71°F
- Early October (1st–15th)
- 34%
- Late October (16th–end)
- 24%
London
GB
- Clear days, October
- 2%
- Sample size
- n=248 days
- Avg high
- 60°F
- Early October (1st–15th)
- 5%
- Late October (16th–end)
- 0%
Compare Florence vs London in another month
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.