ERA5 almanac comparison — 8 years of real data
Palm Desert vs San Juan Islands: weather in March
Palm Desert is the clear winner for sun in March: 55% of days historically clear versus just 0% in San Juan Islands — a 55-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 March. For this
week’s actual forecast, each destination links to its live page below.
Palm Desert
CA
- Clear days, March
- 55%
- Sample size
- n=248 days
- Avg high
- 76°F
- Early March (1st–15th)
- 48%
- Late March (16th–end)
- 62%
- Rain frequency
- 14% of days
San Juan Islands
WA
- Clear days, March
- 0%
- Sample size
- n=248 days
- Avg high
- 49°F
- Early March (1st–15th)
- 0%
- Late March (16th–end)
- 0%
Compare Palm Desert vs San Juan Islands 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.