Jackson, MS

Mississippi · Records since 1896–2026

☁️ 88°F Feels like 95°
Currently in Jackson
As of 1:30 PM CDT

Records for September 11

🔥 Record High

99°F

September 11, 1951

+10° from 89° normal

❄ Record Low

51°F

September 11, 1976

-17° from 68° normal
🌞 Normal high: 89°F 🌑 Normal low: 68°F 1991–2020 normals

All-Time Records — Jackson

🔥
107°F
Hottest Day Ever
Aug 30, 2000
❄
-5°F
Coldest Day Ever
Jan 27, 1940
🌧
7.38"
Wettest Day Ever
Apr 6, 2003
☃
11.7"
Most Snow in One Day
Jan 28, 1904

First & Last Dates — Jackson

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)
304 days
Longest growing season
1921
186 days
Shortest growing season
1910
244 days
Normal growing season
1991–2020 average

Top 10 Record Highs — September 11

# Temp Date
🏆 99°F September 11, 1951
2 99°F September 11, 1921
3 99°F September 11, 1915
4 98°F September 11, 2010
5 98°F September 11, 1947
6 98°F September 11, 1939
7 98°F September 11, 1909
8 97°F September 11, 1980
9 97°F September 11, 1927
10 97°F September 11, 1919

Top 5 Record Lows — September 11

# Temp Date
🥶 51°F September 11, 1976
2 51°F September 11, 1956
3 52°F September 11, 1969
4 52°F September 11, 1968
5 52°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 1896–2026. Climate normals represent the 1991–2020 average.

Heat Wave Summary — Jackson

threshold: 98°F (90th percentile of historical Jun–Aug highs)
5.4
Avg heat wave length
days (historical)
102°
Avg peak temp
during heat waves
102
Dangerous nights 2026
Overnights ≥ 70°F
2
Heat waves 2026
so far

Days ≥ 90°F Per Year

1896–2026
84
2026 so far
92
Avg/year 1970–2025
97
Avg/year (last 10 complete)
129
Most in a year (1902)

Average Daily High by Decade

Full year · complete decades only

Longest Heat Waves — Jackson

# Dates Days Peak Avg High Avg Overnight Low
🏆 Jun 24, 1902 – Jul 14, 1902 21 105°F (Jul 4) 101°F 71°F
2 Aug 10, 1902 – Aug 27, 1902 18 105°F (Aug 15) 102°F 72°F
3 Jul 4, 1980 – Jul 19, 1980 16 106°F (Jul 16) 101°F 74°F
4 Jul 23, 1896 – Aug 6, 1896 15 104°F (Aug 1) 100°F 74°F
5 Jun 21, 1969 – Jul 5, 1969 15 103°F (Jun 29) 101°F 74°F
6 Jul 26, 2023 – Aug 7, 2023 13 104°F (Aug 5) 100°F 76°F
7 Aug 24, 2000 – Sep 4, 2000 12 107°F (Aug 30) 103°F 72°F
8 Aug 8, 2007 – Aug 18, 2007 11 106°F (Aug 14) 101°F 73°F
9 Jun 10, 1902 – Jun 20, 1902 11 104°F (Jun 11) 102°F 70°F
10 Aug 19, 1924 – Aug 29, 1924 11 104°F (Aug 28) 101°F 72°F

Heat Waves Per Year

Warm Summer Nights (Jun–Aug)

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

74
2026 total
above-normal nights
41.5
Avg / summer
1970–2020
78
Most in a summer
2010

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 (1896–2026)

Blue = above average · tan = below average · gold = 2026 (partial)
Since 1896, annual totals have trended +0.78" per decade, about +10.0" 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 Jackson is tracking against normal, year to date

Daily High Temperature vs Normal

Above normal Below normal

166 of 251 days with data were above the 1991–2020 normal high for their date.

Precipitation, Year to Date

34.89"
2026 YTD
Normal: 41.74"
-6.85"
1.64"
September so far
September normal: 3.48"
-1.84"
11
2026 heavy rain days
Days with ≥ 1.0"

Accumulation vs. Normal

Running total since Jan 1 against the normal pace for the same date · Jackson is 6.85" behind the normal pace

Period Review — Sep 1 – Nov 30, 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)
2026 is still under way for this window — totals and rankings appear once November 30 passes.

Average Temperature by Year — Sep 1 – Nov 30

1896–2025 · 2026 highlighted

Precipitation by Year — Sep 1 – Nov 30

1896–2025 · 2026 highlighted · trend +0.33" per decade (wetter since 1896)

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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