Fort Smith, AR

Arkansas · Records since 1882–2026

🌤️ 85°F Feels like 96°
Currently in Fort Smith
As of 1:30 PM CDT

Records for September 11

🔥 Record High

104°F

September 11, 1909

+16° from 88° normal

❄ Record Low

42°F

September 11, 1976

-23° from 65° normal
🌞 Normal high: 88°F 🌑 Normal low: 65°F 1991–2020 normals

All-Time Records — Fort Smith

🔥
115°F
Hottest Day Ever
Aug 3, 2011
❄
-15°F
Coldest Day Ever
Feb 12, 1899
🌧
6.81"
Wettest Day Ever
Nov 24, 1973
☃
11.0"
Most Snow in One Day
Jan 27, 2000

First & Last Dates — Fort Smith

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)
273 days
Longest growing season
1905
182 days
Shortest growing season
2000
226 days
Normal growing season
1991–2020 average

Top 10 Record Highs — September 11

# Temp Date
🏆 104°F September 11, 1909
2 101°F September 11, 2000
3 99°F September 11, 1963
4 99°F September 11, 1936
5 98°F September 11, 2013
6 97°F September 11, 1980
7 97°F September 11, 1939
8 97°F September 11, 1912
9 96°F September 11, 2005
10 96°F September 11, 1956

Top 5 Record Lows — September 11

# Temp Date
🥶 42°F September 11, 1976
2 48°F September 11, 1968
3 49°F September 11, 1959
4 49°F September 11, 1948
5 50°F September 11, 1940
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 1882–2026. Climate normals represent the 1991–2020 average.

Heat Wave Summary — Fort Smith

threshold: 100°F (90th percentile of historical Jun–Aug highs)
5.5
Avg heat wave length
days (historical)
104°
Avg peak temp
during heat waves
106
Dangerous nights 2026
Overnights ≥ 70°F
3
Heat waves 2026
so far

Days ≥ 90°F Per Year

1882–2026
94
2026 so far
76
Avg/year 1970–2025
88
Avg/year (last 10 complete)
113
Most in a year (1954)

Average Daily High by Decade

Full year · complete decades only

Longest Heat Waves — Fort Smith

# Dates Days Peak Avg High Avg Overnight Low
🏆 Jul 5, 2011 – Aug 8, 2011 35 115°F (Aug 3) 106°F 79°F
2 Aug 4, 2026 – Aug 22, 2026 19 109°F (Aug 18) 103°F 76°F
3 Jul 10, 1934 – Jul 26, 1934 17 107°F (Jul 24) 104°F 78°F
4 Aug 8, 1936 – Aug 23, 1936 16 113°F (Aug 10) 104°F 78°F
5 Aug 3, 1956 – Aug 18, 1956 16 109°F (Aug 16) 104°F 73°F
6 Aug 20, 2000 – Sep 4, 2000 16 109°F (Sep 2) 105°F 73°F
7 Aug 25, 2026 – Sep 9, 2026 16 106°F (Aug 30) 104°F 75°F
8 Jul 29, 1934 – Aug 12, 1934 15 109°F (Aug 9) 105°F 78°F
9 Jul 27, 1947 – Aug 10, 1947 15 108°F (Aug 9) 104°F 73°F
10 Jul 8, 1980 – Jul 20, 1980 13 106°F (Jul 16) 103°F 72°F

Heat Waves Per Year

Warm Summer Nights (Jun–Aug)

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

79
2026 total
above-normal nights
41.4
Avg / summer
1970–2020
85
Most in a summer
2011

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 (1882–2026)

Blue = above average · tan = below average · gold = 2026 (partial)
Since 1882, annual totals have trended +0.79" per decade, about +11.3" 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 Fort Smith is tracking against normal, year to date

Daily High Temperature vs Normal

Above normal Below normal

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

Precipitation, Year to Date

26.74"
2026 YTD
Normal: 32.92"
-6.18"
0.23"
September so far
September normal: 4.04"
-3.81"
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 · Fort Smith is 6.18" behind the normal pace

Period Review — Sep 1 – Sep 10, 2026

Any window, evaluated against every other year on record — 10 days

Quick picks: Last 7 days Last 30 days Last 90 days This month
Seasons: Spring (Mar–May) Summer (Jun–Aug) Fall (Sep–Nov)
90.8°F
Average temperature
1st-warmest of 145
+12.1°
vs. average
Normal: 78.7°F (1991–2020)

Average Temperature by Year — Sep 1 – Sep 10

1882–2026 · 2026 highlighted · trend +0.11° per decade (warming since 1882)

Precipitation by Year — Sep 1 – Sep 10

1882–2025 · 2026 highlighted · trend +0.01" per decade (wetter since 1882)

Warmest Sep 1 – Sep 10 on Record

# Year Avg Temp
1 2026 90.8°F
2 1939 89.7°F
3 1936 87.8°F
4 1947 86.9°F
5 1922 86.1°F
6 1925 86.0°F
7 1912 85.7°F
8 2000 84.9°F
9 1998 84.5°F
10 1990 84.3°F

Coolest Sep 1 – Sep 10 on Record

# Year Avg Temp
1 1974 66.8°F
2 1967 69.1°F
3 1891 69.3°F
4 1918 70.5°F
5 1934 71.0°F
6 1882 71.4°F
7 1950 71.9°F
8 1892 71.9°F
9 1928 71.9°F
10 1889 72.0°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.
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