McAllen, TX

Texas · Records since 1941–2026

☀️ 101°F Feels like 106°
Currently in McAllen
As of 1:15 PM CDT
🔥 2° from today's record of 103°F

Records for September 11

🔥 Record High

103°F

September 11, 2023

+8° from 95° normal

❄ Record Low

65°F

September 11, 2020

-11° from 76° normal
🌞 Normal high: 95°F 🌑 Normal low: 76°F 1991–2020 normals

All-Time Records — McAllen

🔥
111°F
Hottest Day Ever
May 9, 2024
❄
13°F
Coldest Day Ever
Jan 12, 1962
🌧
9.42"
Wettest Day Ever
Aug 10, 1980
☃
0.3"
Most Snow in One Day
Dec 8, 2017

First & Last Dates — McAllen

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)
347 days
Longest growing season
1997
234 days
Shortest growing season
1951

Top 10 Record Highs — September 11

# Temp Date
🏆 103°F September 11, 2023
2 102°F September 11, 1989
3 101°F September 11, 2016
4 101°F September 11, 2015
5 101°F September 11, 1987
6 101°F September 11, 1986
7 101°F September 11, 1982
8 100°F September 11, 2011
9 100°F September 11, 1964
10 99°F September 11, 2025

Top 5 Record Lows — September 11

# Temp Date
🥶 65°F September 11, 2020
2 66°F September 11, 1953
3 68°F September 11, 2017
4 69°F September 11, 2011
5 69°F September 11, 1967
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 1941–2026. Climate normals represent the 1991–2020 average.
20
days
🔥 Heat Wave in Progress
20 consecutive days at or above 102°F · since August 22
Heat wave in progress (3+ days ≥ 102°F)

Heat Wave Summary — McAllen

threshold: 102°F (90th percentile of historical Jun–Aug highs)
5.5
Avg heat wave length
days (historical)
104°
Avg peak temp
during heat waves
161
Dangerous nights 2026
Overnights ≥ 70°F
7
Heat waves 2026
so far

Days ≥ 90°F Per Year

1941–2026
174
2026 so far
167
Avg/year 1970–2025
204
Avg/year (last 10 complete)
226
Most in a year (2025)

Average Daily High by Decade

Full year · complete decades only

Longest Heat Waves — McAllen

# Dates Days Peak Avg High Avg Overnight Low
🏆 Jul 15, 2009 – Aug 8, 2009 25 107°F (Jul 20) 105°F 82°F
2 Aug 10, 2019 – Aug 31, 2019 22 106°F (Aug 12) 104°F 80°F
3 Jul 31, 2023 – Aug 20, 2023 21 105°F (Aug 4) 103°F 80°F
4 Aug 22, 2026 – Sep 10, 2026 20 107°F (Aug 22) 105°F 80°F
5 Jul 28, 2016 – Aug 13, 2016 17 107°F (Aug 11) 104°F 80°F
6 Aug 3, 2015 – Aug 19, 2015 17 106°F (Aug 13) 104°F 80°F
7 Jul 17, 2018 – Aug 1, 2018 16 109°F (Jul 24) 104°F 81°F
8 Aug 15, 2018 – Aug 30, 2018 16 106°F (Aug 23) 104°F 81°F
9 Sep 3, 2023 – Sep 15, 2023 13 105°F (Sep 4) 103°F 79°F
10 Jun 15, 2017 – Jun 24, 2017 10 111°F (Jun 22) 104°F 80°F

Heat Waves Per Year

Warm Summer Nights (Jun–Aug)

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

64
2026 total
above-normal nights
14.5
Avg / summer
1970–2020
63
Most in a summer
2009

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 (1941–2026)

Blue = above average · tan = below average · gold = 2026 (partial)
Since 1941, annual totals have trended +0.37" per decade, about +3.1" 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 McAllen is tracking against normal, year to date

Daily High Temperature vs Normal

Above normal Below normal

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

Precipitation, Year to Date

12.27"
2026 YTD
Normal: 14.82"
-2.55"
0.17"
September so far
September normal: 4.61"
-4.44"
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 · McAllen is 2.55" 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)
92.2°F
Average temperature
1st-warmest of 86
+5.0°
vs. average
Normal: 87.2°F (1991–2020)
0.33"
Precipitation
9th-driest of 83
-2.77"
vs. average
Normal: 3.10" · 11% of normal

Average Temperature by Year — Aug 11 – Sep 10

1941–2026 · 2026 highlighted · trend +0.61° per decade (warming since 1941)

Precipitation by Year — Aug 11 – Sep 10

1941–2026 · 2026 highlighted · trend +0.05" per decade (wetter since 1941)

Warmest Aug 11 – Sep 10 on Record

# Year Avg Temp
1 2026 92.2°F
2 2018 91.1°F
3 2019 90.2°F
4 2023 90.2°F
5 2016 89.9°F
6 2012 89.7°F
7 2009 89.5°F
8 2025 89.5°F
9 2015 89.0°F
10 2011 89.0°F

Coolest Aug 11 – Sep 10 on Record

# Year Avg Temp
1 1967 80.9°F
2 1975 82.3°F
3 1976 82.5°F
4 1953 82.6°F
5 1947 82.8°F
6 1973 83.0°F
7 1944 83.1°F
8 1955 83.1°F
9 1961 83.5°F
10 1960 83.6°F

Wettest Aug 11 – Sep 10 on Record

# Year Total
1 1977 9.09"
2 1944 8.66"
3 1990 7.68"
4 2001 7.50"
5 2008 7.41"
6 1960 7.12"
7 1975 6.82"
8 1967 6.54"
9 1979 6.27"
10 2003 5.85"

Driest Aug 11 – Sep 10 on Record

# Year Total
1 2021 0.00"
2 1950 0.03"
3 1946 0.05"
4 1974 0.08"
5 1964 0.09"
6 1963 0.18"
7 1952 0.21"
8 1951 0.26"
9 2026 0.33"
10 2023 0.39"
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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