ERA5 almanac comparison — 8 years of real data
Birmingham vs Jackson Hole: weather in December
Essentially a tie in December: Birmingham is 1% clear historically, Jackson Hole is 0% clear (8-year ERA5 average) — within the noise. Avg high 58°F vs 31°F. Pick based on flight time or price, not weather — the weather won't decide this one for you.
Birmingham
AL
- Clear days, December
- 1%
- Sample size
- n=248 days
- Avg high
- 58°F
- Early December (1st–15th)
- 1%
- Late December (16th–end)
- 1%
- Rain frequency
- 33% of days
Jackson Hole
WY
- Clear days, December
- 0%
- Sample size
- n=248 days
- Avg high
- 31°F
- Early December (1st–15th)
- 0%
- Late December (16th–end)
- 0%
- Rain frequency
- 44% of days
Frequently asked
Is Birmingham or Jackson Hole warmer in December?
Birmingham runs warmer by day in December. Birmingham averages highs of 58°F (highs n=248 days); Jackson Hole averages highs of 31°F (highs n=248 days) (ERA5 2018–2025). Historical averages, not a forecast.
Does it rain more in Birmingham or Jackson Hole in December?
Days with measurable rain: Birmingham 33%, Jackson Hole 44% (n=248 and n=248 days). ERA5 2018–2025; historical, not a forecast.
Which is sunnier in December, Birmingham or Jackson Hole?
Essentially a tie in December: Birmingham is 1% clear historically, Jackson Hole is 0% clear (8-year ERA5 average) — within the noise. Avg high 58°F vs 31°F. Pick based on flight time or price, not weather — the weather won't decide this one for you.
Compare Birmingham vs Jackson Hole 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.