Baton Rouge, LA

Louisiana · Records since 1892–2026

☁️ 88°F Feels like 95°
Currently in Baton Rouge
As of 1:30 PM CDT

Records for September 11

🔥 Record High

102°F

September 11, 1921

+12° from 90° normal

❄ Record Low

55°F

September 11, 1907

-15° from 70° normal
🌞 Normal high: 90°F 🌑 Normal low: 70°F 1991–2020 normals

All-Time Records — Baton Rouge

🔥
110°F
Hottest Day Ever
Aug 19, 1909
❄
2°F
Coldest Day Ever
Feb 13, 1899
🌧
11.99"
Wettest Day Ever
Apr 14, 1967
☃
7.6"
Most Snow in One Day
Jan 21, 2025

First & Last Dates — Baton Rouge

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)
334 days
Longest growing season
2017
214 days
Shortest growing season
1940
278 days
Normal growing season
1991–2020 average

Top 10 Record Highs — September 11

# Temp Date
🏆 102°F September 11, 1921
2 98°F September 11, 1919
3 97°F September 11, 1915
4 97°F September 11, 1914
5 97°F September 11, 1906
6 97°F September 11, 1905
7 96°F September 11, 2023
8 96°F September 11, 1939
9 96°F September 11, 1912
10 95°F September 11, 2019

Top 5 Record Lows — September 11

# Temp Date
🥶 55°F September 11, 1907
2 57°F September 11, 1943
3 58°F September 11, 1999
4 58°F September 11, 1976
5 58°F September 11, 1969
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 1892–2026. Climate normals represent the 1991–2020 average.

Heat Wave Summary — Baton Rouge

threshold: 96°F (90th percentile of historical Jun–Aug highs)
5.2
Avg heat wave length
days (historical)
99°
Avg peak temp
during heat waves
115
Dangerous nights 2026
Overnights ≥ 70°F
3
Heat waves 2026
so far

Days ≥ 90°F Per Year

1892–2026
93
2026 so far
91
Avg/year 1970–2025
111
Avg/year (last 10 complete)
140
Most in a year (2023)

Average Daily High by Decade

Full year · complete decades only

Longest Heat Waves — Baton Rouge

# Dates Days Peak Avg High Avg Overnight Low
🏆 Jul 11, 2023 – Aug 28, 2023 49 106°F (Aug 24) 101°F 78°F
2 Jul 30, 2024 – Aug 18, 2024 20 100°F (Aug 5) 98°F 78°F
3 Jun 18, 2009 – Jul 5, 2009 18 102°F (Jul 2) 98°F 77°F
4 Jul 20, 1924 – Aug 6, 1924 18 101°F (Jul 24) 98°F 74°F
5 Jul 27, 1921 – Aug 11, 1921 16 102°F (Aug 6) 100°F 76°F
6 Jun 20, 1969 – Jul 4, 1969 15 100°F (Jun 28) 98°F 77°F
7 Jul 2, 1960 – Jul 14, 1960 13 101°F (Jul 12) 98°F 76°F
8 Aug 11, 2026 – Aug 23, 2026 13 99°F (Aug 21) 97°F 77°F
9 Jun 15, 2022 – Jun 26, 2022 12 99°F (Jun 23) 98°F 74°F
10 Aug 17, 1921 – Aug 27, 1921 11 103°F (Aug 20) 100°F 74°F

Heat Waves Per Year

Warm Summer Nights (Jun–Aug)

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

69
2026 total
above-normal nights
36.0
Avg / summer
1970–2020
80
Most in a summer
2024

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 (1892–2026)

Blue = above average · tan = below average · gold = 2026 (partial)
Since 1892, annual totals have trended +0.76" per decade, about +10.1" 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 Baton Rouge is tracking against normal, year to date

Daily High Temperature vs Normal

Above normal Below normal

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

Precipitation, Year to Date

44.16"
2026 YTD
Normal: 45.14"
-0.98"
0.00"
September so far
September normal: 4.42"
-4.42"
14
2026 heavy rain days
Days with ≥ 1.0"

Accumulation vs. Normal

Running total since Jan 1 against the normal pace for the same date · Baton Rouge is 0.98" behind the normal pace

Period Review — Sep 3 – Sep 10, 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)
83.9°F
Average temperature
9th-warmest of 133
+3.3°
vs. average
Normal: 80.6°F (1991–2020)
0.00"
Precipitation
1st-driest of 132
-1.23"
vs. average
Normal: 1.23" · 0% of normal

Average Temperature by Year — Sep 3 – Sep 10

1893–2026 · 2026 highlighted

Precipitation by Year — Sep 3 – Sep 10

1893–2026 · 2026 highlighted · trend +0.03" per decade (wetter since 1893)

Warmest Sep 3 – Sep 10 on Record

# Year Avg Temp
1 2019 85.2°F
2 2023 85.1°F
3 1925 85.0°F
4 1912 84.7°F
5 1963 84.7°F
6 1947 84.4°F
7 1989 84.3°F
8 1909 83.9°F
9 2026 83.9°F
10 2007 83.8°F

Coolest Sep 3 – Sep 10 on Record

# Year Avg Temp
1 2011 71.9°F
2 1934 73.3°F
3 1974 73.5°F
4 1988 73.7°F
5 2017 75.0°F
6 1893 75.3°F
7 1952 76.3°F
8 1950 76.3°F
9 1953 76.4°F
10 1967 76.4°F

Wettest Sep 3 – Sep 10 on Record

# Year Total
1 1977 8.81"
2 2011 8.46"
3 1929 6.87"
4 1893 6.53"
5 2024 5.13"
6 1988 4.78"
7 1973 4.51"
8 1904 4.19"
9 1962 3.73"
10 1961 3.42"

Driest Sep 3 – Sep 10 on Record

# Year Total
1 2026 0.00"
2 2020 0.00"
3 2012 0.00"
4 2005 0.00"
5 1995 0.00"
6 1987 0.00"
7 1986 0.00"
8 1981 0.00"
9 1950 0.00"
10 1925 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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