Burbank Glendale Pasadena, CA

California · Records since 1939–2026

☀️ 87°F Feels like 92°
Currently in Burbank Glendale Pasadena
As of 11:15 AM PDT

Records for September 11

🔥 Record High

109°F

September 11, 1983

+21° from 88° normal

❄ Record Low

47°F

September 11, 1978

-17° from 64° normal
🌞 Normal high: 88°F 🌑 Normal low: 64°F 1991–2020 normals

All-Time Records — Burbank Glendale Pasadena

🔥
114°F
Hottest Day Ever
Sep 6, 2024
❄
22°F
Coldest Day Ever
Jan 29, 1979
🌧
7.76"
Wettest Day Ever
Jan 22, 1943
☃
2.5"
Most Snow in One Day
Jan 10, 1949

First & Last Dates — Burbank Glendale Pasadena

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)
360 days
Longest growing season
2015
224 days
Shortest growing season
1978

Top 10 Record Highs — September 11

# Temp Date
🏆 109°F September 11, 1983
2 105°F September 11, 1971
3 105°F September 11, 1963
4 104°F September 11, 1979
5 102°F September 11, 1955
6 102°F September 11, 1943
7 101°F September 11, 1990
8 101°F September 11, 1948
9 100°F September 11, 1953
10 99°F September 11, 1960

Top 5 Record Lows — September 11

# Temp Date
🥶 47°F September 11, 1978
2 49°F September 11, 1946
3 49°F September 11, 1941
4 51°F September 11, 1952
5 52°F September 11, 1994
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 1939–2026. Climate normals represent the 1991–2020 average.
2
days
Hot Streak
2 consecutive days at or above 96°F · since September 9
1 more day to heat wave status

Heat Wave Summary — Burbank Glendale Pasadena

threshold: 96°F (90th percentile of historical Jun–Aug highs)
4.5
Avg heat wave length
days (historical)
103°
Avg peak temp
during heat waves
24
Dangerous nights 2026
Overnights ≥ 70°F
2
Heat waves 2026
so far

Days ≥ 90°F Per Year

1940–2026
58
2026 so far
55
Avg/year 1970–2025
60
Avg/year (last 10 complete)
101
Most in a year (1984)

Average Daily High by Decade

Full year · complete decades only

Longest Heat Waves — Burbank Glendale Pasadena

# Dates Days Peak Avg High Avg Overnight Low
🏆 Sep 7, 1979 – Sep 22, 1979 16 112°F (Sep 9) 103°F 63°F
2 Jul 22, 1980 – Aug 2, 1980 12 107°F (Jul 29) 102°F 65°F
3 Jul 31, 1971 – Aug 11, 1971 12 101°F (Aug 6) 99°F 67°F
4 Aug 30, 2022 – Sep 9, 2022 11 112°F (Aug 31) 104°F 78°F
5 Aug 29, 1955 – Sep 8, 1955 11 111°F (Sep 5) 105°F 70°F
6 Jul 31, 1969 – Aug 10, 1969 11 100°F (Aug 4) 98°F 65°F
7 Jul 23, 1972 – Aug 1, 1972 10 108°F (Jul 28) 102°F 65°F
8 Aug 26, 2009 – Sep 4, 2009 10 105°F (Aug 27) 100°F 70°F
9 Sep 22, 1978 – Sep 30, 1978 9 109°F (Sep 25) 104°F 61°F
10 Aug 26, 1983 – Sep 3, 1983 9 103°F (Aug 27) 99°F 60°F

Heat Waves Per Year

Warm Summer Nights (Jun–Aug)

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

66
2026 total
above-normal nights
29.5
Avg / summer
1970–2020
80
Most in a summer
2022

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 (1939–2026)

Blue = above average · tan = below average · gold = 2026 (partial)
Since 1939, annual totals have trended -0.14" per decade, about -1.2" 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 Burbank Glendale Pasadena is tracking against normal, year to date

Daily High Temperature vs Normal

Above normal Below normal

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

Precipitation, Year to Date

7.87"
2026 YTD
Normal: 10.51"
-2.64"
1.46"
September so far
September normal: 0.11"
+1.35"
3
2026 heavy rain days
Days with ≥ 1.0"

Accumulation vs. Normal

Running total since Jan 1 against the normal pace for the same date · Burbank Glendale Pasadena is 2.64" behind the normal pace

Period Review — Sep 1 – Sep 10, 2026

Any window, evaluated against every other year on record — 10 days

Quick picks: Last 7 days Last 30 days Last 90 days This month
Seasons: Spring (Mar–May) Summer (Jun–Aug) Fall (Sep–Nov)
76.3°F
Average temperature
37th-coolest of 79
-1.0°
vs. average
Normal: 77.3°F (1991–2020)

Average Temperature by Year — Sep 1 – Sep 10

1940–2026 · 2026 highlighted · trend +0.70° per decade (warming since 1940)

Precipitation by Year — Sep 1 – Sep 10

1940–2025 · 2026 highlighted

Warmest Sep 1 – Sep 10 on Record

# Year Avg Temp
1 2022 89.9°F
2 2024 87.8°F
3 1955 87.2°F
4 1984 85.2°F
5 2013 84.7°F
6 2017 81.5°F
7 1945 81.5°F
8 1997 81.2°F
9 1982 81.0°F
10 2009 80.4°F

Coolest Sep 1 – Sep 10 on Record

# Year Avg Temp
1 1942 65.6°F
2 1965 68.1°F
3 1973 68.9°F
4 1940 69.4°F
5 1951 70.0°F
6 1943 70.3°F
7 1964 70.4°F
8 1980 70.4°F
9 1999 70.7°F
10 1941 70.7°F
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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