43.642°N, 70.304°W · station PWMthr · 1874–2026 · 153 years of record
The Almanac Ribbon
Every day of the year at Portland: the record high and record low ever set (outer lines), the everyday normal range (shaded band), and the full record envelope behind it.
Record highRecord lowNormal high–low band (1991–2020)hottest ever 103°F · coldest ever -39°F
Records by Month
Month
Record high
Record low
Jan
67°Jan 6, 2007
-26°Jan 19, 1971
Feb
68°Feb 21, 2018
-39°Feb 16, 1943
Mar
88°Mar 31, 1998
-21°Mar 4, 1950
Apr
92°Apr 28, 2009
8°Apr 4, 1954
May
96°May 31, 1937
23°May 9, 1956
Jun
99°Jun 24, 2025
33°Jun 4, 1944
Jul
103°Jul 4, 1911
40°Jul 3, 1962
Aug
103°Aug 2, 1975
33°Aug 31, 1965
Sep
96°Sep 3, 1929
23°Sep 30, 1941
Oct
88°Oct 7, 1963
15°Oct 28, 1976
Nov
79°Nov 6, 2024
-6°Nov 30, 1875
Dec
71°Dec 7, 1998
-21°Dec 30, 1917
All-time
103°Jul 4, 1911
-39°Feb 16, 1943
Longest-Standing Records
The daily records that have held the longest — set in the earliest years and never beaten since. Highs power Portland on hottestsince.com; lows on coldestsince.com.
Oldest-standing record highs
Date
Record
Set
Standing
Jan 1
58°
1876
150yrs
Jul 18
97°
1876
150yrs
Aug 7
95°
1876
150yrs
Mar 7
60°
1878
148yrs
Aug 2
93°
1879
147yrs
Oct 7
83°
1879
147yrs
May 27
94°
1880
146yrs
Jul 10
94°
1880
146yrs
Apr 23
78°
1881
145yrs
Jul 24
93°
1882
144yrs
Oct 20
77°
1884
142yrs
Dec 7
59°
1884
142yrs
Oldest-standing record lows
Date
Record
Set
Standing
Apr 20
20°
1875
151yrs
Nov 28
5°
1875
151yrs
Nov 29
-6°
1875
151yrs
Nov 30
-3°
1875
151yrs
Dec 17
-10°
1876
150yrs
Mar 4
1°
1887
139yrs
Mar 29
11°
1887
139yrs
Jan 29
-12°
1888
138yrs
Apr 8
16°
1888
138yrs
Dec 1
-1°
1890
136yrs
Dec 2
-3°
1890
136yrs
May 22
34°
1892
134yrs
All-Time Extremes
Hottest ever
103°F
1911-07-04
Coldest ever
-39°F
1943-02-16
Longest heat streak
5 days
≥ 90°F · ended 1944-08-15
The Warming Trend
Portland's annual mean temperature, each year a stripe — blue below the 1991–2020 average, red above.
Days Above / Below the Mark
7 days ≥90°F in 2026 · normal 4 · record 16 in 1955
91 days ≤32°F in 2026 · normal 143 · record 180 in 1944
The Full Record
Every day of the year, record and normal high & low with the year each record was set. Type to filter, click a column to sort.