Los Angeles Airport, CA

California · Records since 1944–2026

☀️ 83°F Feels like 91°
Currently in Los Angeles Airport
As of 11:15 AM PDT

Records for September 11

🔥 Record High

103°F

September 11, 1959

+26° from 77° normal

❄ Record Low

55°F

September 11, 1952

-9° from 64° normal
🌞 Normal high: 77°F 🌑 Normal low: 64°F 1991–2020 normals

All-Time Records — Los Angeles Airport

🔥
110°F
Hottest Day Ever
Sep 26, 1963
❄
27°F
Coldest Day Ever
Jan 4, 1949
🌧
5.60"
Wettest Day Ever
Nov 21, 1967
☃
0.0"
Most Snow in One Day
Dec 9, 2020

First & Last Dates — Los Angeles 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 — September 11

# Temp Date
🏆 103°F September 11, 1959
2 89°F September 11, 1983
3 89°F September 11, 1963
4 88°F September 11, 1948
5 86°F September 11, 2015
6 85°F September 11, 2023
7 85°F September 11, 2022
8 85°F September 11, 2017
9 85°F September 11, 1979
10 85°F September 11, 1971

Top 5 Record Lows — September 11

# Temp Date
🥶 55°F September 11, 1952
2 55°F September 11, 1946
3 57°F September 11, 2010
4 59°F September 11, 2002
5 59°F September 11, 2000
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 1944–2026. Climate normals represent the 1991–2020 average.
4
days
🔥 Heat Wave in Progress
4 consecutive days at or above 80°F · since September 7
Heat wave in progress (3+ days ≥ 80°F)

Heat Wave Summary — Los Angeles Airport

threshold: 80°F (90th percentile of historical Jun–Aug highs)
4.4
Avg heat wave length
days (historical)
89°
Avg peak temp
during heat waves
16
Dangerous nights 2026
Overnights ≥ 70°F
5
Heat waves 2026
so far

Days ≥ 90°F Per Year

1944–2026
5
2026 so far
5
Avg/year 1970–2025
5
Avg/year (last 10 complete)
12
Most in a year (2017)

Average Daily High by Decade

Full year · complete decades only

Longest Heat Waves — Los Angeles Airport

# Dates Days Peak Avg High Avg Overnight Low
🏆 Aug 27, 1959 – Sep 14, 1959 19 103°F (Sep 11) 83°F 67°F
2 Jun 30, 1959 – Jul 15, 1959 16 97°F (Jul 10) 84°F 67°F
3 Aug 31, 2022 – Sep 14, 2022 15 102°F (Sep 9) 88°F 72°F
4 Aug 10, 1994 – Aug 24, 1994 15 95°F (Aug 13) 86°F 69°F
5 Aug 5, 1958 – Aug 18, 1958 14 87°F (Aug 14) 82°F 68°F
6 Sep 19, 1978 – Sep 30, 1978 12 105°F (Sep 24) 93°F 67°F
7 Aug 1, 1971 – Aug 12, 1971 12 90°F (Aug 10) 85°F 70°F
8 Jul 24, 1959 – Aug 4, 1959 12 89°F (Aug 1) 84°F 68°F
9 Aug 21, 2019 – Aug 31, 2019 11 85°F (Aug 26) 81°F 68°F
10 Oct 20, 1965 – Oct 29, 1965 10 101°F (Oct 22) 91°F 62°F

Heat Waves Per Year

Warm Summer Nights (Jun–Aug)

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

73
2026 total
above-normal nights
32.8
Avg / summer
1970–2020
77
Most in a summer
2018

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 (1944–2026)

Blue = above average · tan = below average · gold = 2026 (partial)
Since 1944, annual totals have trended +0.27" per decade, about +2.2" 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 Los Angeles Airport is tracking against normal, year to date

Daily High Temperature vs Normal

Above normal Below normal

167 of 253 days with data were above the 1991–2020 normal high for their date.

Precipitation, Year to Date

6.14"
2026 YTD
Normal: 8.60"
-2.46"
0.65"
September so far
September normal: 0.11"
+0.54"
1
2026 heavy rain days
Days with ≥ 1.0"

Accumulation vs. Normal

Running total since Jan 1 against the normal pace for the same date · Los Angeles Airport is 2.46" behind the normal pace

Period Review — Aug 11 – Sep 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)
75.9°F
Average temperature
2nd-warmest of 83
+4.8°
vs. average
Normal: 71.0°F (1991–2020)
0.65"
Precipitation
5th-wettest of 83
+0.65"
vs. average
Normal: 0.00"

Average Temperature by Year — Aug 11 – Sep 10

1944–2026 · 2026 highlighted · trend +0.40° per decade (warming since 1944)

Precipitation by Year — Aug 11 – Sep 10

1944–2026 · 2026 highlighted · trend +0.01" per decade (wetter since 1944)

Warmest Aug 11 – Sep 10 on Record

# Year Avg Temp
1 1984 75.9°F
2 2026 75.9°F
3 2022 75.1°F
4 1994 74.3°F
5 2015 74.0°F
6 1958 73.8°F
7 1997 73.7°F
8 1959 73.6°F
9 1998 73.5°F
10 1967 73.5°F

Coolest Aug 11 – Sep 10 on Record

# Year Avg Temp
1 1948 65.5°F
2 2010 66.1°F
3 1950 66.1°F
4 1953 66.4°F
5 1989 66.6°F
6 1951 67.1°F
7 1975 67.1°F
8 1947 67.2°F
9 1946 67.3°F
10 1987 67.7°F

Wettest Aug 11 – Sep 10 on Record

# Year Total
1 2023 2.59"
2 1977 2.47"
3 1976 1.67"
4 1983 1.09"
5 2026 0.65"
6 1963 0.39"
7 1978 0.39"
8 1984 0.31"
9 1961 0.30"
10 1985 0.26"

Driest Aug 11 – Sep 10 on Record

# Year Total
1 2025 0.00"
2 2024 0.00"
3 2020 0.00"
4 2019 0.00"
5 2018 0.00"
6 2016 0.00"
7 2013 0.00"
8 2012 0.00"
9 2011 0.00"
10 2010 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.
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