Tucson, AZ

Arizona · Records since 1894–2026

🌙 81°F
Currently in Tucson
As of 7:15 PM MST

Records for September 26

🔥 Record High

105°F

September 26, 2024

+13° from 92° normal

❄ Record Low

43°F

September 26, 1913

-24° from 67° normal
🌞 Normal high: 92°F 🌑 Normal low: 67°F 1991–2020 normals

All-Time Records — Tucson

🔥
117°F
Hottest Day Ever
Jun 26, 1990
❄
6°F
Coldest Day Ever
Jan 7, 1913
🌧
3.93"
Wettest Day Ever
Jul 29, 1958
☃
6.8"
Most Snow in One Day
Dec 8, 1971

First & Last Dates — Tucson

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)
351 days
Longest growing season
2014
165 days
Shortest growing season
1899
296 days
Normal growing season
1991–2020 average

Top 10 Record Highs — September 26

# Temp Date
🏆 105°F September 26, 2024
2 104°F September 26, 2023
3 104°F September 26, 1899
4 103°F September 26, 2005
5 102°F September 26, 1956
6 102°F September 26, 1898
7 101°F September 26, 1938
8 100°F September 26, 2020
9 100°F September 26, 2009
10 100°F September 26, 1991

Top 5 Record Lows — September 26

# Temp Date
🥶 43°F September 26, 1913
2 49°F September 26, 1920
3 50°F September 26, 1917
4 50°F September 26, 1900
5 52°F September 26, 1934
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 1894–2026. Climate normals represent the 1991–2020 average.

Heat Wave Summary — Tucson

threshold: 106°F (90th percentile of historical Jun–Aug highs)
4.9
Avg heat wave length
days (historical)
109°
Avg peak temp
during heat waves
110
Dangerous nights 2026
Overnights ≥ 70°F
4
Heat waves 2026
so far

Days ≥ 90°F Per Year

1894–2026
154
2026 so far
146
Avg/year 1970–2025
168
Avg/year (last 10 complete)
190
Most in a year (2017)

Average Daily High by Decade

Full year · complete decades only

Longest Heat Waves — Tucson

# Dates Days Peak Avg High Avg Overnight Low
🏆 Jul 13, 2023 – Jul 30, 2023 18 112°F (Jul 18) 110°F 81°F
2 Jul 24, 1995 – Aug 9, 1995 17 114°F (Jul 28) 108°F 78°F
3 Aug 8, 2020 – Aug 20, 2020 13 111°F (Aug 13) 108°F 80°F
4 Jun 23, 1994 – Jul 4, 1994 12 116°F (Jun 29) 111°F 80°F
5 Jul 2, 2024 – Jul 13, 2024 12 112°F (Jul 8) 109°F 80°F
6 Jun 27, 2005 – Jul 8, 2005 12 110°F (Jul 5) 107°F 76°F
7 Jun 18, 1990 – Jun 28, 1990 11 117°F (Jun 26) 111°F 77°F
8 Jun 18, 2017 – Jun 28, 2017 11 116°F (Jun 20) 111°F 82°F
9 Jun 14, 2008 – Jun 24, 2008 11 111°F (Jun 21) 108°F 75°F
10 Jun 26, 2007 – Jul 6, 2007 11 110°F (Jul 4) 108°F 78°F

Heat Waves Per Year

Warm Summer Nights (Jun–Aug)

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

56
2026 total
above-normal nights
28.6
Avg / summer
1970–2020
68
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 (1894–2026)

Blue = above average · tan = below average · gold = 2026 (partial)
Since 1894, annual totals have trended -0.02" per decade, about -0.2" 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 Tucson is tracking against normal, year to date

Daily High Temperature vs Normal

Above normal Below normal

169 of 267 days with data were above the 1991–2020 normal high for their date.

Precipitation, Year to Date

7.89"
2026 YTD
Normal: 8.25"
-0.36"
0.42"
September so far
September normal: 1.32"
-0.90"
0
2026 heavy rain days
Days with ≥ 1.0"

Accumulation vs. Normal

Running total since Jan 1 against the normal pace for the same date · Tucson is 0.36" behind the normal pace

Period Review — Sep 18 – Sep 25, 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)
82.6°F
Average temperature
25th-warmest of 133
+1.0°
vs. average
Normal: 81.6°F (1991–2020)

Average Temperature by Year — Sep 18 – Sep 25

1894–2026 · 2026 highlighted · trend +0.26° per decade (warming since 1894)

Precipitation by Year — Sep 18 – Sep 25

1894–2025 · 2026 highlighted · trend +0.01" per decade (wetter since 1894)

Warmest Sep 18 – Sep 25 on Record

# Year Avg Temp
1 2020 86.8°F
2 2010 85.1°F
3 2001 84.6°F
4 2005 84.4°F
5 2012 84.3°F
6 2022 84.2°F
7 2025 83.8°F
8 1997 83.8°F
9 2014 83.5°F
10 1915 83.4°F

Coolest Sep 18 – Sep 25 on Record

# Year Avg Temp
1 1965 72.0°F
2 1964 72.2°F
3 1971 73.1°F
4 1985 73.5°F
5 1974 73.8°F
6 1961 73.9°F
7 1900 74.1°F
8 1923 74.6°F
9 2004 75.0°F
10 1970 75.2°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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