ERA5 almanac comparison — 8 years of real data
New York City vs Scottsdale: weather in May
Scottsdale is the clear winner for sun in May: 93% of days historically clear versus just 24% in New York City — a 69-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 May. For this
week’s actual forecast, each destination links to its live page below.
New York City
NY
- Clear days, May
- 24%
- Sample size
- n=248 days
- Avg high
- 71°F
- Early May (1st–15th)
- 18%
- Late May (16th–end)
- 30%
Scottsdale
AZ
- Clear days, May
- 93%
- Sample size
- n=248 days
- Avg high
- 95°F
- Early May (1st–15th)
- 91%
- Late May (16th–end)
- 95%
- Rain frequency
- 2% of days
Compare New York City 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.