ERA5 almanac comparison — 8 years of real data
Key West vs Tucson: weather in April
Tucson is the clear winner for sun in April: 88% of days historically clear versus just 44% in Key West — a 44-point gap across 8 years of ERA5 data. Key West also sees measurably more rain than Tucson this month (21% vs 3% of days). This isn't close.
Key West
FL
- Clear days, April
- 44%
- Sample size
- n=240 days
- Avg high
- 78°F
- Early April (1st–15th)
- 51%
- Late April (16th–end)
- 38%
- Rain frequency
- 21% of days
Tucson
AZ
- Clear days, April
- 88%
- Sample size
- n=240 days
- Avg high
- 85°F
- Early April (1st–15th)
- 83%
- Late April (16th–end)
- 93%
- Rain frequency
- 3% of days
Frequently asked
Is Key West or Tucson warmer in April?
Tucson runs warmer by day in April. Key West averages highs of 78°F (highs n=240 days); Tucson averages highs of 85°F (highs n=240 days) (ERA5 2018–2025). Historical averages, not a forecast.
Does it rain more in Key West or Tucson in April?
Key West is measurably wetter than Tucson. Days with measurable rain: Key West 21%, Tucson 3% (n=240 and n=240 days). ERA5 2018–2025; historical, not a forecast.
Which is sunnier in April, Key West or Tucson?
Tucson is the clear winner for sun in April: 88% of days historically clear versus just 44% in Key West — a 44-point gap across 8 years of ERA5 data. Key West also sees measurably more rain than Tucson this month (21% vs 3% of days). This isn't close.
Compare Key West vs Tucson 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 forecast for any destination is on its own page and may differ from the long-run average. Data from Open-Meteo.