Houston, TX

Texas · Records since 1888–2026

🌧️ 77°F Feels like 82°
Currently in Houston
As of 1:15 PM CDT

Records for September 11

🔥 Record High

99°F

September 11, 2011

+8° from 91° normal

❄ Record Low

56°F

September 11, 1907

-16° from 72° normal
🌞 Normal high: 91°F 🌑 Normal low: 72°F 1991–2020 normals

All-Time Records — Houston

🔥
109°F
Hottest Day Ever
Aug 27, 2023
❄
5°F
Coldest Day Ever
Jan 18, 1930
🌧
16.07"
Wettest Day Ever
Aug 27, 2017
☃
3.0"
Most Snow in One Day
Feb 12, 1960

First & Last Dates — Houston

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)
339 days
Longest growing season
1953
222 days
Shortest growing season
1987
290 days
Normal growing season
1991–2020 average

Top 10 Record Highs — September 11

# Temp Date
🏆 99°F September 11, 2011
2 99°F September 11, 1893
3 98°F September 11, 1909
4 97°F September 11, 2014
5 97°F September 11, 1930
6 96°F September 11, 2023
7 96°F September 11, 1965
8 96°F September 11, 1912
9 96°F September 11, 1911
10 95°F September 11, 2022

Top 5 Record Lows — September 11

# Temp Date
🥶 56°F September 11, 1907
2 58°F September 11, 1976
3 62°F September 11, 2021
4 64°F September 11, 2017
5 64°F September 11, 2012
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 1888–2026. Climate normals represent the 1991–2020 average.

Heat Wave Summary — Houston

threshold: 98°F (90th percentile of historical Jun–Aug highs)
5.5
Avg heat wave length
days (historical)
101°
Avg peak temp
during heat waves
131
Dangerous nights 2026
Overnights ≥ 70°F
3
Heat waves 2026
so far

Days ≥ 90°F Per Year

1889–2026
97
2026 so far
96
Avg/year 1970–2025
124
Avg/year (last 10 complete)
145
Most in a year (2025)

Average Daily High by Decade

Full year · complete decades only

Longest Heat Waves — Houston

# Dates Days Peak Avg High Avg Overnight Low
🏆 Jun 22, 1980 – Jul 19, 1980 28 104°F (Jul 8) 101°F 77°F
2 Jul 31, 2011 – Aug 24, 2011 25 104°F (Aug 18) 101°F 79°F
3 Jul 29, 2023 – Aug 21, 2023 24 108°F (Aug 20) 103°F 80°F
4 Jul 10, 2023 – Jul 26, 2023 17 101°F (Jul 22) 99°F 79°F
5 Aug 2, 2015 – Aug 15, 2015 14 106°F (Aug 11) 100°F 76°F
6 Jul 23, 1998 – Aug 5, 1998 14 104°F (Aug 2) 101°F 75°F
7 Aug 15, 2026 – Aug 28, 2026 14 103°F (Aug 22) 100°F 79°F
8 Jul 11, 2000 – Jul 23, 2000 13 103°F (Jul 15) 101°F 74°F
9 Jun 10, 1902 – Jun 22, 1902 13 101°F (Jun 11) 100°F 71°F
10 Aug 9, 1993 – Aug 21, 1993 13 101°F (Aug 16) 100°F 75°F

Heat Waves Per Year

Warm Summer Nights (Jun–Aug)

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

62
2026 total
above-normal nights
25.1
Avg / summer
1970–2020
72
Most in a summer
1951

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 (1888–2026)

Blue = above average · tan = below average · gold = 2026 (partial)
Since 1888, annual totals have trended +0.64" per decade, about +8.8" 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 Houston is tracking against normal, year to date

Daily High Temperature vs Normal

Above normal Below normal

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

Precipitation, Year to Date

35.14"
2026 YTD
Normal: 35.55"
-0.41"
0.80"
September so far
September normal: 4.71"
-3.91"
13
2026 heavy rain days
Days with ≥ 1.0"

Accumulation vs. Normal

Running total since Jan 1 against the normal pace for the same date · Houston is 0.41" 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)
87.1°F
Average temperature
4th-warmest of 137
+3.3°
vs. average
Normal: 83.8°F (1991–2020)
1.71"
Precipitation
31st-driest of 138
-3.50"
vs. average
Normal: 5.21" · 33% of normal

Average Temperature by Year — Aug 11 – Sep 10

1889–2026 · 2026 highlighted · trend +0.17° per decade (warming since 1889)

Precipitation by Year — Aug 11 – Sep 10

1889–2026 · 2026 highlighted · trend +0.07" per decade (wetter since 1889)

Warmest Aug 11 – Sep 10 on Record

# Year Avg Temp
1 2023 90.1°F
2 2011 87.6°F
3 2019 87.2°F
4 2026 87.1°F
5 2020 86.8°F
6 1902 86.3°F
7 1951 86.3°F
8 1963 86.1°F
9 2010 86.0°F
10 1980 85.9°F

Coolest Aug 11 – Sep 10 on Record

# Year Avg Temp
1 1967 78.5°F
2 1891 78.9°F
3 1893 79.4°F
4 1974 79.4°F
5 1973 79.4°F
6 1894 79.5°F
7 1992 79.8°F
8 1897 80.0°F
9 1996 80.3°F
10 1979 80.4°F

Wettest Aug 11 – Sep 10 on Record

# Year Total
1 2017 31.47"
2 1915 14.40"
3 1900 11.80"
4 1945 11.69"
5 2016 10.76"
6 1897 10.21"
7 1920 10.19"
8 2001 9.90"
9 1983 9.89"
10 1944 9.68"

Driest Aug 11 – Sep 10 on Record

# Year Total
1 2011 0.14"
2 1905 0.14"
3 1909 0.43"
4 2023 0.46"
5 1924 0.59"
6 1927 0.67"
7 1930 0.72"
8 1891 0.74"
9 1999 0.76"
10 1946 0.84"
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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