South Bend, IN

Indiana · Records since 1893–2026

☀️ 79°F
Currently in South Bend
As of 2:00 PM EDT

Records for September 11

🔥 Record High

96°F

September 11, 2013

+20° from 76° normal

❄ Record Low

33°F

September 11, 1917

-22° from 55° normal
🌞 Normal high: 76°F 🌑 Normal low: 55°F 1991–2020 normals

All-Time Records — South Bend

🔥
109°F
Hottest Day Ever
Jul 24, 1934
❄
-22°F
Coldest Day Ever
Jan 20, 1943
🌧
7.69"
Wettest Day Ever
Aug 15, 2016
☃
26.0"
Most Snow in One Day
Jan 8, 2011

First & Last Dates — South Bend

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)
214 days
Longest growing season
1985
114 days
Shortest growing season
1897
170 days
Normal growing season
1991–2020 average

Top 10 Record Highs — September 11

# Temp Date
🏆 96°F September 11, 2013
2 96°F September 11, 1931
3 95°F September 11, 1908
4 94°F September 11, 1952
5 92°F September 11, 1897
6 91°F September 11, 1936
7 90°F September 11, 2019
8 90°F September 11, 1961
9 90°F September 11, 1947
10 90°F September 11, 1916

Top 5 Record Lows — September 11

# Temp Date
🥶 33°F September 11, 1917
2 38°F September 11, 1943
3 40°F September 11, 1929
4 41°F September 11, 1958
5 42°F September 11, 1993
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 1893–2026. Climate normals represent the 1991–2020 average.

Heat Wave Summary — South Bend

threshold: 91°F (90th percentile of historical Jun–Aug highs)
4.3
Avg heat wave length
days (historical)
96°
Avg peak temp
during heat waves
18
Dangerous nights 2026
Overnights ≥ 70°F
2
Heat waves 2026
so far

Days ≥ 90°F Per Year

1894–2026
12
2026 so far
17
Avg/year 1970–2025
16
Avg/year (last 10 complete)
53
Most in a year (1934)

Average Daily High by Decade

Full year · complete decades only

Longest Heat Waves — South Bend

# Dates Days Peak Avg High Avg Overnight Low
🏆 Jul 10, 1901 – Jul 24, 1901 15 103°F (Jul 21) 97°F 67°F
2 Jul 6, 1936 – Jul 18, 1936 13 108°F (Jul 14) 102°F 70°F
3 Sep 5, 1897 – Sep 15, 1897 11 98°F (Sep 14) 95°F 64°F
4 Jul 27, 1988 – Aug 5, 1988 10 103°F (Aug 1) 96°F 71°F
5 Jun 26, 1913 – Jul 5, 1913 10 97°F (Jun 29) 94°F 71°F
6 Aug 20, 1959 – Aug 29, 1959 10 96°F (Aug 25) 93°F 72°F
7 Jul 18, 1934 – Jul 26, 1934 9 109°F (Jul 24) 103°F 72°F
8 Aug 25, 1953 – Sep 2, 1953 9 99°F (Sep 1) 95°F 67°F
9 Jul 20, 1918 – Jul 28, 1918 9 96°F (Jul 26) 93°F 70°F
10 Jul 24, 1916 – Jul 31, 1916 8 102°F (Jul 29) 98°F 71°F

Heat Waves Per Year

Warm Summer Nights (Jun–Aug)

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

52
2026 total
above-normal nights
50.5
Avg / summer
1970–2020
78
Most in a summer
1983

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 (1893–2026)

Blue = above average · tan = below average · gold = 2026 (partial)
Since 1893, annual totals have trended +0.68" per decade, about +9.0" 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 South Bend is tracking against normal, year to date

Daily High Temperature vs Normal

Above normal Below normal

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

Precipitation, Year to Date

33.01"
2026 YTD
Normal: 28.00"
+5.01"
0.15"
September so far
September normal: 3.49"
-3.34"
10
2026 heavy rain days
Days with ≥ 1.0"

Accumulation vs. Normal

Running total since Jan 1 against the normal pace for the same date · South Bend is 5.01" ahead of 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)
72.7°F
Average temperature
20th-warmest of 131
+2.5°
vs. average
Normal: 70.2°F (1991–2020)

Average Temperature by Year — Aug 11 – Sep 10

1894–2026 · 2026 highlighted

Precipitation by Year — Aug 11 – Sep 10

1895–2025 · 2026 highlighted · trend +0.02" per decade (wetter since 1895)

Warmest Aug 11 – Sep 10 on Record

# Year Avg Temp
1 1959 78.1°F
2 1947 78.0°F
3 1983 77.7°F
4 1922 75.9°F
5 1936 74.8°F
6 1900 74.7°F
7 1899 74.5°F
8 2021 74.1°F
9 1995 74.0°F
10 1912 73.9°F

Coolest Aug 11 – Sep 10 on Record

# Year Avg Temp
1 1924 65.5°F
2 1967 65.5°F
3 1986 65.5°F
4 2017 65.6°F
5 1997 65.8°F
6 1915 65.9°F
7 1951 66.0°F
8 1963 66.1°F
9 1946 66.2°F
10 1992 66.3°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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