Del Rio, TX

Texas · Records since 1905–2026

🌙 88°F
Currently in Del Rio
As of 9:15 PM CDT

Records for September 26

🔥 Record High

106°F

September 26, 2005

+15° from 91° normal

❄ Record Low

48°F

September 26, 1909

-22° from 70° normal
🌞 Normal high: 91°F 🌑 Normal low: 70°F 1991–2020 normals

All-Time Records — Del Rio

🔥
115°F
Hottest Day Ever
Jun 21, 2023
❄
10°F
Coldest Day Ever
Dec 23, 1989
🌧
17.03"
Wettest Day Ever
Aug 23, 1998
☃
11.2"
Most Snow in One Day
Feb 18, 2021

First & Last Dates — Del Rio

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)
349 days
Longest growing season
1928
213 days
Shortest growing season
1913
284 days
Normal growing season
1991–2020 average

Top 10 Record Highs — September 26

# Temp Date
🏆 106°F September 26, 2005
2 104°F September 26, 2011
3 103°F September 26, 1977
4 101°F September 26, 1959
5 99°F September 26, 2023
6 99°F September 26, 1953
7 98°F September 26, 1951
8 97°F September 26, 1911
9 96°F September 26, 1931
10 96°F September 26, 1920

Top 5 Record Lows — September 26

# Temp Date
🥶 48°F September 26, 1909
2 49°F September 26, 2000
3 50°F September 26, 1926
4 50°F September 26, 1912
5 51°F September 26, 1975
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 1905–2026. Climate normals represent the 1991–2020 average.

Heat Wave Summary — Del Rio

threshold: 102°F (90th percentile of historical Jun–Aug highs)
5.7
Avg heat wave length
days (historical)
106°
Avg peak temp
during heat waves
141
Dangerous nights 2026
Overnights ≥ 70°F
1
Heat waves 2026
so far

Days ≥ 90°F Per Year

1906–2026
144
2026 so far
130
Avg/year 1970–2025
162
Avg/year (last 10 complete)
199
Most in a year (2024)

Average Daily High by Decade

Full year · complete decades only

Longest Heat Waves — Del Rio

# Dates Days Peak Avg High Avg Overnight Low
🏆 Jul 30, 2024 – Aug 24, 2024 26 113°F (Aug 22) 106°F 82°F
2 Jul 30, 2023 – Aug 21, 2023 23 111°F (Aug 10) 108°F 82°F
3 Jul 9, 2023 – Jul 28, 2023 20 108°F (Jul 13) 106°F 81°F
4 Jul 11, 1980 – Jul 30, 1980 20 107°F (Jul 28) 103°F 77°F
5 Jul 31, 2020 – Aug 17, 2020 18 108°F (Aug 15) 104°F 79°F
6 Aug 5, 2019 – Aug 21, 2019 17 108°F (Aug 13) 105°F 80°F
7 Jul 10, 1998 – Jul 26, 1998 17 107°F (Jul 12) 104°F 81°F
8 Jun 18, 1980 – Jul 3, 1980 16 108°F (Jun 27) 104°F 79°F
9 Jul 3, 2020 – Jul 17, 2020 15 112°F (Jul 13) 107°F 81°F
10 Jun 18, 2023 – Jun 30, 2023 13 115°F (Jun 21) 109°F 82°F

Heat Waves Per Year

Warm Summer Nights (Jun–Aug)

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

13
2026 total
above-normal nights
8.9
Avg / summer
1970–2020
69
Most in a summer
2023

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 (1905–2026)

Blue = above average · tan = below average · gold = 2026 (partial)
Since 1905, annual totals have trended +0.07" per decade, about +0.9" 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 Del Rio is tracking against normal, year to date

Daily High Temperature vs Normal

Above normal Below normal

113 of 265 days with data were above the 1991–2020 normal high for their date.

Precipitation, Year to Date

14.47"
2026 YTD
Normal: 15.66"
-1.19"
0.00"
September so far
September normal: 2.63"
-2.63"
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 · Del Rio is 1.19" behind the normal pace

Period Review — Jun 27 – Sep 25, 2026

Any window, evaluated against every other year on record — 91 days

Quick picks: Last 7 days Last 30 days Last 90 days This month
Seasons: Spring (Mar–May) Summer (Jun–Aug) Fall (Sep–Nov)
87.6°F
Average temperature
7th-warmest of 121
+2.0°
vs. average
Normal: 85.5°F (1991–2020)

Average Temperature by Year — Jun 27 – Sep 25

1906–2026 · 2026 highlighted · trend +0.26° per decade (warming since 1906)

Precipitation by Year — Jun 27 – Sep 25

1906–2025 · 2026 highlighted · trend +0.08" per decade (wetter since 1906)

Warmest Jun 27 – Sep 25 on Record

# Year Avg Temp
1 2023 91.6°F
2 2024 89.1°F
3 2019 88.9°F
4 2020 88.3°F
5 2000 88.1°F
6 2021 87.9°F
7 2026 87.6°F
8 2011 87.5°F
9 1911 87.4°F
10 2012 87.3°F

Coolest Jun 27 – Sep 25 on Record

# Year Avg Temp
1 1971 79.5°F
2 1976 80.0°F
3 1906 80.4°F
4 1919 80.6°F
5 1975 80.7°F
6 1916 81.2°F
7 1974 81.8°F
8 2007 81.8°F
9 1908 81.9°F
10 1972 82.0°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.
← Back to all stations