ERA5 almanac comparison — 8 years of real data
Door County vs Kiawah Island: weather in May
Kiawah Island is the clear winner for sun in May: 38% of days historically clear versus just 4% in Door County — a 34-point gap across 8 years of ERA5 data. This isn't close.
Door County
WI
- Clear days, May
- 4%
- Sample size
- n=248 days
- Avg high
- 61°F
- Early May (1st–15th)
- 1%
- Late May (16th–end)
- 7%
- Rain frequency
- 32% of days
Kiawah Island
SC
- Clear days, May
- 38%
- Sample size
- n=248 days
- Avg high
- 80°F
- Early May (1st–15th)
- 45%
- Late May (16th–end)
- 32%
- Rain frequency
- 37% of days
Frequently asked
Is Door County or Kiawah Island warmer in May?
Kiawah Island runs warmer by day in May. Door County averages highs of 61°F (highs n=248 days); Kiawah Island averages highs of 80°F (highs n=248 days) (ERA5 2018–2025). Historical averages, not a forecast.
Does it rain more in Door County or Kiawah Island in May?
Days with measurable rain: Door County 32%, Kiawah Island 37% (n=248 and n=248 days). ERA5 2018–2025; historical, not a forecast.
Which is sunnier in May, Door County or Kiawah Island?
Kiawah Island is the clear winner for sun in May: 38% of days historically clear versus just 4% in Door County — a 34-point gap across 8 years of ERA5 data. This isn't close.
Compare Door County vs Kiawah Island 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.