Grand Forks, ND

North Dakota · Records since 1941–2026

☁️ 75°F
Currently in Grand Forks
As of 1:30 PM CDT

Records for September 11

🔥 Record High

95°F

September 11, 1952

+22° from 73° normal

❄ Record Low

25°F

September 11, 1955

-22° from 47° normal
🌞 Normal high: 73°F 🌑 Normal low: 47°F 1991–2020 normals

All-Time Records — Grand Forks

🔥
104°F
Hottest Day Ever
Jul 5, 1988
❄
-43°F
Coldest Day Ever
Jan 30, 2004
🌧
4.44"
Wettest Day Ever
Jul 16, 1995
☃
17.0"
Most Snow in One Day
Mar 4, 1966

First & Last Dates — Grand Forks

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)
172 days
Longest growing season
2024
55 days
Shortest growing season
1972
134 days
Normal growing season
1991–2020 average

Top 10 Record Highs — September 11

# Temp Date
🏆 95°F September 11, 1952
2 94°F September 11, 1990
3 92°F September 11, 1976
4 89°F September 11, 2011
5 87°F September 11, 2018
6 87°F September 11, 1948
7 84°F September 11, 1958
8 83°F September 11, 2016
9 83°F September 11, 1971
10 82°F September 11, 2017

Top 5 Record Lows — September 11

# Temp Date
🥶 25°F September 11, 1955
2 32°F September 11, 1984
3 32°F September 11, 1964
4 33°F September 11, 2007
5 33°F September 11, 1985
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 1941–2026. Climate normals represent the 1991–2020 average.

Heat Wave Summary — Grand Forks

threshold: 90°F (90th percentile of historical Jun–Aug highs)
3.8
Avg heat wave length
days (historical)
96°
Avg peak temp
during heat waves
2
Dangerous nights 2026
Overnights ≥ 70°F
1
Heat waves 2026
so far

Days ≥ 90°F Per Year

1941–2026
20
2026 so far
12
Avg/year 1970–2025
12
Avg/year (last 10 complete)
32
Most in a year (1976)

Average Daily High by Decade

Full year · complete decades only

Longest Heat Waves — Grand Forks

# Dates Days Peak Avg High Avg Overnight Low
🏆 Aug 21, 1969 – Aug 29, 1969 9 94°F (Aug 26) 91°F 60°F
2 Aug 18, 1976 – Aug 24, 1976 7 100°F (Aug 20) 96°F 63°F
3 Jun 14, 1995 – Jun 20, 1995 7 100°F (Jun 17) 95°F 70°F
4 Jul 16, 1955 – Jul 21, 1955 6 98°F (Jul 21) 93°F 64°F
5 Jun 4, 1970 – Jun 9, 1970 6 98°F (Jun 6) 93°F 60°F
6 Jul 11, 2006 – Jul 16, 2006 6 98°F (Jul 16) 94°F 60°F
7 Jul 20, 1963 – Jul 25, 1963 6 97°F (Jul 25) 92°F 64°F
8 Jun 2, 1988 – Jun 7, 1988 6 96°F (Jun 7) 94°F 60°F
9 Aug 14, 2003 – Aug 19, 2003 6 95°F (Aug 17) 93°F 62°F
10 Jun 30, 2021 – Jul 5, 2021 6 94°F (Jul 3) 92°F 62°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
45.4
Avg / summer
1970–2020
67
Most in a summer
1997

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 (1941–2026)

Blue = above average · tan = below average · gold = 2026 (partial)
Since 1941, annual totals have trended +0.32" per decade, about +2.7" 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 Forks is tracking against normal, year to date

Daily High Temperature vs Normal

Above normal Below normal

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

Precipitation, Year to Date

15.49"
2026 YTD
Normal: 16.86"
-1.37"
2.60"
September so far
September normal: 2.26"
+0.34"
5
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 Forks is 1.37" behind the normal pace

Period Review — Jun 12 – Sep 10, 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)
69.5°F
Average temperature
10th-warmest of 86
+2.0°
vs. average
Normal: 67.4°F (1991–2020)
8.34"
Precipitation
42nd-wettest of 83
-1.43"
vs. average
Normal: 9.77" · 85% of normal

Average Temperature by Year — Jun 12 – Sep 10

1941–2026 · 2026 highlighted · trend +0.25° per decade (warming since 1941)

Precipitation by Year — Jun 12 – Sep 10

1941–2026 · 2026 highlighted · trend +0.09" per decade (wetter since 1941)

Warmest Jun 12 – Sep 10 on Record

# Year Avg Temp
1 1983 70.7°F
2 2021 70.0°F
3 1955 69.9°F
4 1995 69.8°F
5 1961 69.7°F
6 2022 69.6°F
7 1991 69.6°F
8 2011 69.5°F
9 2012 69.5°F
10 2026 69.5°F

Coolest Jun 12 – Sep 10 on Record

# Year Avg Temp
1 1968 61.8°F
2 2004 61.8°F
3 1992 62.1°F
4 1965 62.6°F
5 1972 63.3°F
6 1985 63.3°F
7 1958 64.3°F
8 1942 64.4°F
9 1969 64.5°F
10 1993 64.5°F

Wettest Jun 12 – Sep 10 on Record

# Year Total
1 1944 17.48"
2 1995 16.22"
3 1993 15.67"
4 2016 14.50"
5 2020 14.07"
6 1994 12.91"
7 2024 12.55"
8 2002 12.43"
9 2001 12.21"
10 1952 12.15"

Driest Jun 12 – Sep 10 on Record

# Year Total
1 1967 1.76"
2 1972 4.15"
3 2013 4.26"
4 1973 4.29"
5 2006 4.34"
6 1963 5.07"
7 1996 5.39"
8 2007 5.70"
9 1989 5.73"
10 2023 6.27"
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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