Eureka, CA

California · Records since 1886–2026

☁️ 64°F
Currently in Eureka
As of 3:45 PM PST

Records for November 12

🔥 Record High

73°F

November 12, 1999

+15° from 58° normal

❄ Record Low

31°F

November 12, 1985

-13° from 44° normal
🌞 Normal high: 58°F 🌑 Normal low: 44°F 1991–2020 normals

All-Time Records — Eureka

🔥
87°F
Hottest Day Ever
Sep 28, 2020
❄
20°F
Coldest Day Ever
Jan 14, 1888
🌧
6.79"
Wettest Day Ever
Dec 27, 2002
☃
3.4"
Most Snow in One Day
Jan 13, 1907

First & Last Dates — Eureka

How early and how late each seasonal turning point has ever arrived, across the full period of record

Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
Range ever recorded Normal date (1991–2020)
352 days
Longest growing season
1991
226 days
Shortest growing season
1929
293 days
Normal growing season
1991–2020 average

Top 10 Record Highs — November 12

# Temp Date
🏆 73°F November 12, 1999
2 73°F November 12, 1967
3 73°F November 12, 1904
4 71°F November 12, 1974
5 70°F November 12, 1969
6 70°F November 12, 1942
7 69°F November 12, 1991
8 69°F November 12, 1923
9 68°F November 12, 2025
10 68°F November 12, 1986

Top 5 Record Lows — November 12

# Temp Date
🥶 31°F November 12, 1985
2 32°F November 12, 2000
3 33°F November 12, 1916
4 34°F November 12, 1978
5 34°F November 12, 1938
About this data — Records are sourced from the NOAA Threadex dataset via RCC ACIS, a quality-controlled record for long-term climate stations. Threadex adjusts for station relocations and observation-time changes, making records comparable across all years since 1886–2026. Climate normals represent the 1991–2020 average.
2
days
Hot Streak
2 consecutive days at or above 66°F · since November 9
1 more day to heat wave status

Heat Wave Summary — Eureka

threshold: 66°F (90th percentile of historical Jun–Aug highs)
4.6
Avg heat wave length
days (historical)
72°
Avg peak temp
during heat waves
0
Dangerous nights 2026
Overnights ≥ 70°F
4
Heat waves 2026
so far

Average Daily High by Decade

Full year · complete decades only

Longest Heat Waves — Eureka

# Dates Days Peak Avg High Avg Overnight Low
🏆 Aug 20, 1997 – Sep 22, 1997 34 75°F (Sep 13) 71°F 56°F
2 Aug 22, 1979 – Sep 15, 1979 25 85°F (Sep 12) 70°F 57°F
3 Aug 3, 1994 – Aug 25, 1994 23 69°F (Aug 10) 67°F 56°F
4 Sep 5, 2019 – Sep 25, 2019 21 76°F (Sep 15) 69°F 55°F
5 Sep 14, 2020 – Sep 29, 2020 16 87°F (Sep 28) 71°F 55°F
6 Aug 1, 1983 – Aug 15, 1983 15 76°F (Aug 12) 69°F 56°F
7 Jul 21, 2026 – Aug 4, 2026 15 73°F (Jul 22) 68°F 54°F
8 Jul 12, 2007 – Jul 24, 2007 13 74°F (Jul 21) 70°F 57°F
9 Aug 4, 2003 – Aug 16, 2003 13 71°F (Aug 8) 70°F 55°F
10 Aug 23, 2019 – Sep 3, 2019 12 73°F (Aug 29) 69°F 55°F

Heat Waves Per Year

Warm Summer Nights (Jun–Aug)

Nights where the overnight low exceeded the 1991–2020 normal low

54
2026 total
above-normal nights
45.6
Avg / summer
1970–2020
76
Most in a summer
2004

Above-Normal Summer Nights Per Year

Average June–August Low by Decade

Overnight lows · complete decades only

Precipitation

Annual totals and trend across the full period of record · see this year's standing →

Monthly Precipitation — Last 24 Months

Blue = actual · dashed line = monthly normal

Annual Precipitation Per Year (1886–2026)

Blue = above average · tan = below average · gold = 2026 (partial)

Heavy Rain Days Per Year (≥ 1.0")

Compare year-to-year changes in days with heavy rainfall (≥ 1.0")

This Year — 2026

How Eureka is tracking against normal, year to date

Daily High Temperature vs Normal

Above normal Below normal

141 of 313 days with data were above the 1991–2020 normal high for their date.

Precipitation, Year to Date

18.69"
2026 YTD
Normal: 28.66"
-9.97"
0.35"
November so far
November normal: 4.89"
-4.54"
5
2026 heavy rain days
Days with ≥ 1.0"

Accumulation vs. Normal

Running total since Jan 1 against the normal pace for the same date · Eureka is 9.97" behind the normal pace

Period Review — Oct 11 – Nov 10, 2026

Any window, evaluated against every other year on record — 31 days

Quick picks: Last 7 days Last 30 days Last 90 days This month
Seasons: Spring (Mar–May) Summer (Jun–Aug) Fall (Sep–Nov)
52.4°F
Average temperature
41st-coolest of 140
-1.2°
vs. average
Normal: 53.6°F (1991–2020)
1.65"
Precipitation
35th-driest of 140
-1.47"
vs. average
Normal: 3.12" · 53% of normal

Average Temperature by Year — Oct 11 – Nov 10

1887–2026 · 2026 highlighted · trend +0.09° per decade (warming since 1887)

Precipitation by Year — Oct 11 – Nov 10

1887–2026 · 2026 highlighted · trend +0.04" per decade (wetter since 1887)

Warmest Oct 11 – Nov 10 on Record

# Year Avg Temp
1 2014 57.9°F
2 2016 57.7°F
3 1983 57.3°F
4 1950 57.2°F
5 1987 57.0°F
6 1992 56.4°F
7 1979 56.3°F
8 1993 56.2°F
9 1967 56.2°F
10 1937 56.1°F

Coolest Oct 11 – Nov 10 on Record

# Year Avg Temp
1 1935 48.8°F
2 1919 48.9°F
3 1971 48.9°F
4 2013 49.2°F
5 1916 49.6°F
6 1890 50.0°F
7 1946 50.4°F
8 1895 50.4°F
9 1920 50.5°F
10 1893 50.8°F

Wettest Oct 11 – Nov 10 on Record

# Year Total
1 2016 11.35"
2 1950 10.96"
3 1973 9.70"
4 1979 9.35"
5 1924 8.92"
6 1944 8.90"
7 1902 8.02"
8 1964 7.65"
9 1963 7.28"
10 1899 7.10"

Driest Oct 11 – Nov 10 on Record

# Year Total
1 1905 0.00"
2 1978 0.07"
3 1929 0.11"
4 2013 0.24"
5 1993 0.35"
6 2020 0.42"
7 1959 0.46"
8 1890 0.49"
9 1936 0.50"
10 1926 0.50"
About this data. Pick any start and end date and this becomes the same kind of review as the Month and Fall tabs, just for exactly the window you asked for — the generalized version of the same engine, evaluated across every year on record. Average temperature is the mean of each day's (high + low) / 2; precipitation is the sum of daily totals. A year missing more than about a fifth of the window's days is excluded from the temperature ranking; any missing day excludes a year from the precipitation ranking, since an unreported day is unreported rain. Ranges that cross from December into January aren't supported yet. Normals are the 1991–2020 mean for the same window.
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