ERA5 almanac comparison — 8 years of real data
Park City vs Portland: weather in January
Essentially a tie in January: Park City is 0% clear historically, Portland is 0% clear (8-year ERA5 average) — within the noise. Avg high 32°F vs 34°F. Pick based on flight time or price, not weather — the weather won't decide this one for you.
Park City
UT
- Clear days, January
- 0%
- Sample size
- n=248 days
- Avg high
- 32°F
- Early January (1st–15th)
- 0%
- Late January (16th–end)
- 0%
- Rain frequency
- 35% of days
Portland
ME
- Clear days, January
- 0%
- Sample size
- n=248 days
- Avg high
- 34°F
- Early January (1st–15th)
- 0%
- Late January (16th–end)
- 0%
- Rain frequency
- 31% of days
Frequently asked
Is Park City or Portland warmer in January?
Portland runs warmer by day in January. Park City averages highs of 32°F (highs n=248 days); Portland averages highs of 34°F (highs n=248 days) (ERA5 2018–2025). Historical averages, not a forecast.
Does it rain more in Park City or Portland in January?
Days with measurable rain: Park City 35%, Portland 31% (n=248 and n=248 days). ERA5 2018–2025; historical, not a forecast.
Which is sunnier in January, Park City or Portland?
Essentially a tie in January: Park City is 0% clear historically, Portland is 0% clear (8-year ERA5 average) — within the noise. Avg high 32°F vs 34°F. Pick based on flight time or price, not weather — the weather won't decide this one for you.
Compare Park City vs Portland 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.