ERA5 almanac comparison — 8 years of real data
Albuquerque vs Charleston: weather in September
Albuquerque is the clear winner for sun in September: 76% of days historically clear versus just 32% in Charleston — a 44-point gap across 8 years of ERA5 data. Charleston also sees measurably more rain than Albuquerque this month (46% vs 10% of days). This isn't close.
Albuquerque
NM
- Clear days, September
- 76%
- Sample size
- n=240 days
- Avg high
- 85°F
- Early September (1st–15th)
- 77%
- Late September (16th–end)
- 76%
- Rain frequency
- 10% of days
Charleston
SC
- Clear days, September
- 32%
- Sample size
- n=240 days
- Avg high
- 83°F
- Early September (1st–15th)
- 28%
- Late September (16th–end)
- 37%
- Rain frequency
- 46% of days
Frequently asked
Is Albuquerque or Charleston warmer in September?
Albuquerque runs warmer by day in September. Albuquerque averages highs of 85°F (highs n=240 days); Charleston averages highs of 83°F (highs n=240 days) (ERA5 2018–2025). Historical averages, not a forecast.
Does it rain more in Albuquerque or Charleston in September?
Charleston is measurably wetter than Albuquerque. Days with measurable rain: Albuquerque 10%, Charleston 46% (n=240 and n=240 days). ERA5 2018–2025; historical, not a forecast.
Which is sunnier in September, Albuquerque or Charleston?
Albuquerque is the clear winner for sun in September: 76% of days historically clear versus just 32% in Charleston — a 44-point gap across 8 years of ERA5 data. Charleston also sees measurably more rain than Albuquerque this month (46% vs 10% of days). This isn't close.
Compare Albuquerque vs Charleston 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.