ERA5 almanac comparison — 8 years of real data
Phoenix vs Tulum: weather in March
Phoenix is the clear winner for sun in March: 61% of days historically clear versus just 28% in Tulum — a 33-point gap across 8 years of ERA5 data. Tulum also sees measurably more rain than Phoenix this month (35% vs 13% of days). This isn't close.
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
Tulum
Mexico
- Clear days, March
- 28%
- Sample size
- n=248 days
- Avg high
- 84°F
- Early March (1st–15th)
- 25%
- Late March (16th–end)
- 30%
- Rain frequency
- 35% of days
Frequently asked
Is Phoenix or Tulum warmer in March?
Tulum runs warmer by day in March. Phoenix averages highs of 76°F (highs n=248 days); Tulum averages highs of 84°F (highs n=248 days) (ERA5 2018–2025). Historical averages, not a forecast.
Does it rain more in Phoenix or Tulum in March?
Tulum is measurably wetter than Phoenix. Days with measurable rain: Phoenix 13%, Tulum 35% (n=248 and n=248 days). ERA5 2018–2025; historical, not a forecast.
Which is sunnier in March, Phoenix or Tulum?
Phoenix is the clear winner for sun in March: 61% of days historically clear versus just 28% in Tulum — a 33-point gap across 8 years of ERA5 data. Tulum also sees measurably more rain than Phoenix this month (35% vs 13% of days). This isn't close.
Compare Phoenix vs Tulum 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.