San Francisco Airport, CA

California · Records since 1945–2026

☀️ 66°F
Currently in San Francisco Airport
As of 1:45 PM PST

Records for November 4

🔥 Record High

82°F

November 4, 1949

+14° from 68° normal

❄ Record Low

38°F

November 4, 1946

-12° from 50° normal
🌞 Normal high: 68°F 🌑 Normal low: 50°F 1991–2020 normals

All-Time Records — San Francisco Airport

🔥
105°F
Hottest Day Ever
Jun 14, 2000
❄
24°F
Coldest Day Ever
Dec 9, 1972
🌧
5.59"
Wettest Day Ever
Jan 4, 1982
☃
1.5"
Most Snow in One Day
Jan 21, 1962

First & Last Dates — San Francisco Airport

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)

Top 10 Record Highs — November 4

# Temp Date
🏆 82°F November 4, 1949
2 79°F November 4, 1986
3 79°F November 4, 1980
4 78°F November 4, 1997
5 78°F November 4, 1976
6 77°F November 4, 2010
7 76°F November 4, 2012
8 76°F November 4, 2007
9 76°F November 4, 1952
10 76°F November 4, 1951

Top 5 Record Lows — November 4

# Temp Date
🥶 38°F November 4, 1946
2 40°F November 4, 1973
3 42°F November 4, 1968
4 43°F November 4, 1957
5 43°F November 4, 1956
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 1945–2026. Climate normals represent the 1991–2020 average.

Heat Wave Summary — San Francisco Airport

threshold: 79°F (90th percentile of historical Jun–Aug highs)
3.8
Avg heat wave length
days (historical)
90°
Avg peak temp
during heat waves
0
Dangerous nights 2026
Overnights ≥ 70°F
3
Heat waves 2026
so far

Days ≥ 90°F Per Year

1946–2026
4
2026 so far
4
Avg/year 1970–2025
5
Avg/year (last 10 complete)
12
Most in a year (1984)

Average Daily High by Decade

Full year · complete decades only

Longest Heat Waves — San Francisco Airport

# Dates Days Peak Avg High Avg Overnight Low
🏆 Oct 12, 2020 – Oct 21, 2020 10 94°F (Oct 16) 85°F 58°F
2 Jul 17, 2006 – Jul 25, 2006 9 97°F (Jul 22) 85°F 60°F
3 Sep 30, 2024 – Oct 7, 2024 8 98°F (Oct 6) 90°F 62°F
4 Jun 15, 1981 – Jun 22, 1981 8 92°F (Jun 15) 87°F 55°F
5 Aug 13, 2020 – Aug 19, 2020 7 99°F (Aug 14) 87°F 62°F
6 Sep 27, 2020 – Oct 3, 2020 7 96°F (Sep 28) 89°F 59°F
7 Oct 10, 1959 – Oct 16, 1959 7 87°F (Oct 13) 84°F 55°F
8 Aug 31, 2017 – Sep 5, 2017 6 104°F (Sep 1) 92°F 65°F
9 Jun 23, 1976 – Jun 28, 1976 6 97°F (Jun 24) 95°F 59°F
10 Sep 24, 2010 – Sep 29, 2010 6 96°F (Sep 27) 90°F 60°F

Heat Waves Per Year

Warm Summer Nights (Jun–Aug)

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

74
2026 total
above-normal nights
34.2
Avg / summer
1970–2020
82
Most in a summer
2015

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 (1945–2026)

Blue = above average · tan = below average · gold = 2026 (partial)
Since 1945, annual totals have trended +0.17" per decade, about +1.3" across the record.

Heavy Rain Days Per Year (≥ 1.0")

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

This Year — 2026

How San Francisco Airport is tracking against normal, year to date

Daily High Temperature vs Normal

Above normal Below normal

129 of 307 days with data were above the 1991–2020 normal high for their date.

Precipitation, Year to Date

11.19"
2026 YTD
Normal: 13.60"
-2.41"
0.24"
November so far
November normal: 2.04"
-1.80"
4
2026 heavy rain days
Days with ≥ 1.0"

Accumulation vs. Normal

Running total since Jan 1 against the normal pace for the same date · San Francisco Airport is 2.41" behind the normal pace

Period Review — Oct 27 – Nov 3, 2026

Any window, evaluated against every other year on record — 8 days

Quick picks: Last 7 days Last 30 days Last 90 days This month
Seasons: Spring (Mar–May) Summer (Jun–Aug) Fall (Sep–Nov)
59.4°F
Average temperature
37th-warmest of 81
-0.4°
vs. average
Normal: 59.8°F (1991–2020)
0.28"
Precipitation
26th-wettest of 81
+0.02"
vs. average
Normal: 0.26" · 108% of normal

Average Temperature by Year — Oct 27 – Nov 3

1945–2026 · 2026 highlighted · trend +0.39° per decade (warming since 1945)

Precipitation by Year — Oct 27 – Nov 3

1945–2026 · 2026 highlighted · trend -0.02" per decade (drier since 1945)

Warmest Oct 27 – Nov 3 on Record

# Year Avg Temp
1 1993 65.3°F
2 1983 64.9°F
3 1997 63.6°F
4 1967 63.1°F
5 2018 63.0°F
6 2021 62.8°F
7 2014 62.7°F
8 2015 62.6°F
9 1992 62.4°F
10 2023 62.3°F

Coolest Oct 27 – Nov 3 on Record

# Year Avg Temp
1 1971 52.4°F
2 1956 53.8°F
3 1996 54.9°F
4 1974 55.2°F
5 1952 55.4°F
6 1975 55.4°F
7 1978 55.5°F
8 1951 55.6°F
9 1961 55.6°F
10 1954 55.6°F

Wettest Oct 27 – Nov 3 on Record

# Year Total
1 1945 2.00"
2 1981 1.93"
3 2008 1.71"
4 1964 1.64"
5 2016 1.43"
6 1992 0.98"
7 1956 0.91"
8 1972 0.88"
9 1974 0.88"
10 1968 0.79"

Driest Oct 27 – Nov 3 on Record

# Year Total
1 2025 0.00"
2 2023 0.00"
3 2020 0.00"
4 2019 0.00"
5 2018 0.00"
6 2013 0.00"
7 2009 0.00"
8 2007 0.00"
9 2002 0.00"
10 1998 0.00"
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.
← Back to all stations