ERA5 almanac comparison — 8 years of real data
Charleston vs Houston: weather in April
Charleston edges out Houston for sun in April: 38% clear historically versus 28% (8-year ERA5 average, a 10-point gap). Houston also sees measurably more rain than Charleston this month (42% vs 26% of days). Both are viable — Charleston is the safer bet.
Charleston
SC
- Clear days, April
- 38%
- Sample size
- n=240 days
- Avg high
- 74°F
- Early April (1st–15th)
- 30%
- Late April (16th–end)
- 45%
- Rain frequency
- 26% of days
Houston
TX
- Clear days, April
- 28%
- Sample size
- n=240 days
- Avg high
- 78°F
- Early April (1st–15th)
- 27%
- Late April (16th–end)
- 28%
- Rain frequency
- 42% of days
Frequently asked
Is Charleston or Houston warmer in April?
Houston runs warmer by day in April. Charleston averages highs of 74°F (highs n=240 days); Houston averages highs of 78°F (highs n=240 days) (ERA5 2018–2025). Historical averages, not a forecast.
Does it rain more in Charleston or Houston in April?
Houston is measurably wetter than Charleston. Days with measurable rain: Charleston 26%, Houston 42% (n=240 and n=240 days). ERA5 2018–2025; historical, not a forecast.
Which is sunnier in April, Charleston or Houston?
Charleston edges out Houston for sun in April: 38% clear historically versus 28% (8-year ERA5 average, a 10-point gap). Houston also sees measurably more rain than Charleston this month (42% vs 26% of days). Both are viable — Charleston is the safer bet.
Compare Charleston vs Houston 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.