ERA5 almanac comparison — 8 years of real data
Houston vs Whistler: weather in April
Houston edges out Whistler for sun in April: 28% clear historically versus 1% (8-year ERA5 average, a 27-point gap). Both are viable — Houston is the safer bet.
What you are reading: 8-year historical averages, not a forecast.
Either destination can still surprise you this specific April. For this
week’s actual forecast, each destination links to its live page below.
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
Whistler
BC
- Clear days, April
- 1%
- Sample size
- n=240 days
- Avg high
- 49°F
- Early April (1st–15th)
- 0%
- Late April (16th–end)
- 2%
Compare Houston vs Whistler 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.