Grand Rapids, MI

Michigan · Records since 1892–2026

☀️ 76°F
Currently in Grand Rapids
As of 2:30 PM

Records for September 11

🔥 Record High

94°F

September 11, 1931

+18° from 76° normal

❄ Record Low

32°F

September 11, 1943

-23° from 55° normal
🌞 Normal high: 76°F 🌑 Normal low: 55°F 1991–2020 normals

All-Time Records — Grand Rapids

🔥
108°F
Hottest Day Ever
Jul 13, 1936
❄
-24°F
Coldest Day Ever
Feb 14, 1899
🌧
4.22"
Wettest Day Ever
Aug 19, 1939
☃
16.1"
Most Snow in One Day
Jan 26, 1978

First & Last Dates — Grand Rapids

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)
212 days
Longest growing season
1938
112 days
Shortest growing season
1946
166 days
Normal growing season
1991–2020 average

Top 10 Record Highs — September 11

# Temp Date
🏆 94°F September 11, 1931
2 91°F September 11, 1952
3 90°F September 11, 2005
4 90°F September 11, 1906
5 90°F September 11, 1900
6 89°F September 11, 1908
7 88°F September 11, 2019
8 88°F September 11, 2013
9 88°F September 11, 1978
10 88°F September 11, 1930

Top 5 Record Lows — September 11

# Temp Date
🥶 32°F September 11, 1943
2 36°F September 11, 1898
3 37°F September 11, 1993
4 38°F September 11, 1995
5 38°F September 11, 1917
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 1892–2026. Climate normals represent the 1991–2020 average.

Heat Wave Summary — Grand Rapids

threshold: 90°F (90th percentile of historical Jun–Aug highs)
4.3
Avg heat wave length
days (historical)
95°
Avg peak temp
during heat waves
9
Dangerous nights 2026
Overnights ≥ 70°F
2
Heat waves 2026
so far

Days ≥ 90°F Per Year

1892–2026
9
2026 so far
13
Avg/year 1970–2025
12
Avg/year (last 10 complete)
37
Most in a year (1988)

Average Daily High by Decade

Full year · complete decades only

Longest Heat Waves — Grand Rapids

# Dates Days Peak Avg High Avg Overnight Low
🏆 Jul 14, 1901 – Jul 24, 1901 11 97°F (Jul 17) 94°F 69°F
2 Aug 25, 1953 – Sep 3, 1953 10 97°F (Aug 31) 94°F 65°F
3 Jul 22, 1916 – Jul 30, 1916 9 103°F (Jul 29) 98°F 73°F
4 Jul 3, 1897 – Jul 11, 1897 9 100°F (Jul 4) 97°F 69°F
5 Jul 7, 1936 – Jul 14, 1936 8 108°F (Jul 13) 102°F 76°F
6 Jul 18, 1934 – Jul 25, 1934 8 104°F (Jul 21) 98°F 72°F
7 Jun 30, 1921 – Jul 7, 1921 8 100°F (Jul 5) 96°F 72°F
8 Aug 17, 1947 – Aug 24, 1947 8 98°F (Aug 24) 96°F 70°F
9 Aug 22, 1948 – Aug 29, 1948 8 98°F (Aug 24) 94°F 69°F
10 Aug 4, 1900 – Aug 11, 1900 8 96°F (Aug 5) 94°F 73°F

Heat Waves Per Year

Warm Summer Nights (Jun–Aug)

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

48
2026 total
above-normal nights
37.1
Avg / summer
1970–2020
64
Most in a summer
1921

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 (1892–2026)

Blue = above average · tan = below average · gold = 2026 (partial)
Since 1892, annual totals have trended +0.82" per decade, about +10.9" 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 Grand Rapids is tracking against normal, year to date

Daily High Temperature vs Normal

Above normal Below normal

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

Precipitation, Year to Date

30.08"
2026 YTD
Normal: 27.46"
+2.62"
1.06"
September so far
September normal: 3.43"
-2.37"
6
2026 heavy rain days
Days with ≥ 1.0"

Accumulation vs. Normal

Running total since Jan 1 against the normal pace for the same date · Grand Rapids is 2.62" ahead of the normal pace

Period Review — Jun 1 – Aug 31, 2026

Any window, evaluated against every other year on record — 92 days

Quick picks: Last 7 days Last 30 days Last 90 days This month
Seasons: Spring (Mar–May) Summer (Jun–Aug) Fall (Sep–Nov)
71.4°F
Average temperature
38th-warmest of 133
+0.9°
vs. average
Normal: 70.5°F (1991–2020)
9.65"
Precipitation
66th-wettest of 132
-1.70"
vs. average
Normal: 11.35" · 85% of normal

Average Temperature by Year — Jun 1 – Aug 31

1892–2026 · 2026 highlighted

Precipitation by Year — Jun 1 – Aug 31

1892–2026 · 2026 highlighted · trend +0.24" per decade (wetter since 1892)

Warmest Jun 1 – Aug 31 on Record

# Year Avg Temp
1 1921 74.6°F
2 2012 73.6°F
3 1901 73.4°F
4 1933 73.3°F
5 2010 73.3°F
6 1934 73.2°F
7 1919 73.2°F
8 1931 73.2°F
9 1955 72.8°F
10 1936 72.8°F

Coolest Jun 1 – Aug 31 on Record

# Year Avg Temp
1 1992 65.5°F
2 1915 66.0°F
3 1945 66.7°F
4 1950 66.9°F
5 1903 67.0°F
6 1927 67.1°F
7 1958 67.2°F
8 1974 67.2°F
9 1951 67.2°F
10 1985 67.3°F

Wettest Jun 1 – Aug 31 on Record

# Year Total
1 1994 22.63"
2 1892 18.39"
3 1905 17.91"
4 1986 17.71"
5 1970 15.74"
6 1975 15.66"
7 1993 15.61"
8 2021 15.26"
9 1987 14.95"
10 2016 14.74"

Driest Jun 1 – Aug 31 on Record

# Year Total
1 1918 3.18"
2 1927 3.54"
3 1930 3.62"
4 1919 4.17"
5 1984 4.23"
6 1962 4.33"
7 1913 4.43"
8 1898 4.45"
9 1976 4.63"
10 1923 4.69"
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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