ERA5 almanac comparison — 8 years of real data
Houston vs Scottsdale: weather in July
Scottsdale is the clear winner for sun in July: 76% of days historically clear versus just 21% in Houston — a 55-point gap across 8 years of ERA5 data. Houston also sees measurably more rain than Scottsdale this month (57% vs 11% of days). This isn't close.
What you are reading: 8-year historical averages, not a forecast.
Either destination can still surprise you this specific July. For this
week’s actual forecast, each destination links to its live page below.
Houston
TX
- Clear days, July
- 21%
- Sample size
- n=248 days
- Avg high
- 91°F
- Early July (1st–15th)
- 13%
- Late July (16th–end)
- 29%
- Rain frequency
- 57% of days
Scottsdale
AZ
- Clear days, July
- 76%
- Sample size
- n=248 days
- Avg high
- 107°F
- Early July (1st–15th)
- 87%
- Late July (16th–end)
- 66%
- Rain frequency
- 11% of days
Compare Houston vs Scottsdale 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.