ERA5 almanac comparison — 8 years of real data
Cayman Islands vs Phoenix: weather in March
Phoenix is the clear winner for sun in March: 61% of days historically clear versus just 17% in Cayman Islands — a 44-point gap across 8 years of ERA5 data. Cayman Islands also sees measurably more rain than Phoenix this month (60% vs 13% of days). This isn't close.
Cayman Islands
Cayman Islands
- Clear days, March
- 17%
- Sample size
- n=248 days
- Avg high
- 83°F
- Early March (1st–15th)
- 11%
- Late March (16th–end)
- 22%
- Rain frequency
- 60% of days
Phoenix
AZ
- Clear days, March
- 61%
- Sample size
- n=248 days
- Avg high
- 76°F
- Early March (1st–15th)
- 54%
- Late March (16th–end)
- 67%
- Rain frequency
- 13% of days
Frequently asked
Is Cayman Islands or Phoenix warmer in March?
Cayman Islands runs warmer by day in March. Cayman Islands averages highs of 83°F (highs n=248 days); Phoenix averages highs of 76°F (highs n=248 days) (ERA5 2018–2025). Historical averages, not a forecast.
Does it rain more in Cayman Islands or Phoenix in March?
Cayman Islands is measurably wetter than Phoenix. Days with measurable rain: Cayman Islands 60%, Phoenix 13% (n=248 and n=248 days). ERA5 2018–2025; historical, not a forecast.
Which is sunnier in March, Cayman Islands or Phoenix?
Phoenix is the clear winner for sun in March: 61% of days historically clear versus just 17% in Cayman Islands — a 44-point gap across 8 years of ERA5 data. Cayman Islands also sees measurably more rain than Phoenix this month (60% vs 13% of days). This isn't close.
Compare Cayman Islands vs Phoenix 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.