ERA5 almanac comparison — 8 years of real data
Dallas vs Hartford: weather in October
Dallas is the clear winner for sun in October: 49% of days historically clear versus just 11% in Hartford — a 38-point gap across 8 years of ERA5 data. This isn't close.
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.
Dallas
TX
- Clear days, October
- 49%
- Sample size
- n=248 days
- Avg high
- 80°F
- Early October (1st–15th)
- 66%
- Late October (16th–end)
- 34%
- Rain frequency
- 26% of days
Hartford
CT
- Clear days, October
- 11%
- Sample size
- n=248 days
- Avg high
- 64°F
- Early October (1st–15th)
- 15%
- Late October (16th–end)
- 7%
Compare Dallas vs Hartford 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.