40.810°N, 124.160°W · station EKAthr · 1886–2026 · 141 years of record
The Almanac Ribbon
Every day of the year at Eureka: 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 87°F · coldest ever 20°F
Records by Month
Month
Record high
Record low
Jan
78°Jan 12, 1986
20°Jan 14, 1888
Feb
85°Feb 17, 1930
24°Feb 4, 1899
Mar
78°Mar 19, 1914
29°Mar 3, 1896
Apr
80°Apr 9, 1989
31°Apr 5, 1895
May
84°May 13, 1939
35°May 1, 1887
Jun
85°Jun 6, 1903
40°Jun 26, 1887
Jul
77°Jul 28, 2015
43°Jul 15, 1887
Aug
82°Aug 30, 1968
44°Aug 16, 1935
Sep
87°Sep 2, 2017
36°Sep 22, 1895
Oct
87°Oct 26, 1993
32°Oct 29, 1971
Nov
81°Nov 11, 1904
27°Nov 27, 1896
Dec
77°Dec 30, 1963
21°Dec 9, 1972
All-time
87°Oct 26, 1993
20°Jan 14, 1888
Longest-Standing Records
The daily records that have held the longest — set in the earliest years and never beaten since. Highs power Eureka on hottestsince.com; lows on coldestsince.com.
Oldest-standing record highs
Date
Record
Set
Standing
Dec 30
70°
1886
140yrs
May 27
75°
1887
139yrs
Oct 9
82°
1887
139yrs
Jan 26
77°
1888
138yrs
Jul 16
73°
1888
138yrs
Nov 17
70°
1888
138yrs
Jan 25
71°
1889
137yrs
Nov 3
72°
1889
137yrs
May 23
78°
1890
136yrs
Apr 25
73°
1891
135yrs
Aug 17
71°
1891
135yrs
Dec 14
70°
1891
135yrs
Oldest-standing record lows
Date
Record
Set
Standing
Jan 16
27°
1887
139yrs
Jan 25
27°
1887
139yrs
Feb 8
27°
1887
139yrs
Feb 9
28°
1887
139yrs
Feb 20
28°
1887
139yrs
Feb 22
28°
1887
139yrs
Apr 30
35°
1887
139yrs
May 10
36°
1887
139yrs
May 11
39°
1887
139yrs
Jun 9
42°
1887
139yrs
Jun 24
43°
1887
139yrs
Jun 25
40°
1887
139yrs
All-Time Extremes
Hottest ever
87°F
1993-10-26
Coldest ever
20°F
1888-01-14
Longest heat streak
0 days
≥ 90°F · ended —
The Warming Trend
Eureka's annual mean temperature, each year a stripe — blue below the 1991–2020 average, red above.
Days Above / Below the Mark
0 days ≥90°F in 2026 · normal 0 · record 0 in 1886
1 days ≤32°F in 2026 · normal 6 · record 25 in 2013
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.