Daily average temperatures for winter at Portland International Airport since 1939, Dec. 1–Feb. 28. The charts show how winter 2026 compares with the previous 87 winters, including day-by-day temperatures, warmth percentiles and winter average temperatures.
2026 winter highlights
Days above normal
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Warmest winter rank
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Hottest day
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Coldest day
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How far above or below normal was winter 2026?
The dashed line shows where each day’s temperature in winter 2026 ranks compared with the same calendar day in every winter since 1939. A value near 50 means about average for that date. Higher values mean warmer than most years; lower values mean colder. A value near 95 means that day was among the warmest 5% for that date on record.
Daily temperatures by winter
This chart stacks daily average temperatures from 88 winters (Dec. 1–Feb. 28) on the same timeline. Use the legend to compare 2026 with the warmest and coldest winters on record.
Where winter 2026 ranks in the record
Each bar is one winter’s average temperature. Bars are sorted from coldest to warmest. Click a bar to compare that winter in the spaghetti chart above.
Winter averages by year, 1939–2026