Williston, ND

North Dakota · Records since 1894–2026

⛅ 67°F Feels like 57°
Currently in Williston
As of 1:30 PM CDT

Records for September 11

🔥 Record High

94°F

September 11, 1939

+19° from 75° normal

❄ Record Low

24°F

September 11, 1964

-21° from 45° normal
🌞 Normal high: 75°F 🌑 Normal low: 45°F 1991–2020 normals

All-Time Records — Williston

🔥
110°F
Hottest Day Ever
Jul 5, 1936
❄
-50°F
Coldest Day Ever
Dec 23, 1983
🌧
4.93"
Wettest Day Ever
Jul 10, 1963
☃
15.0"
Most Snow in One Day
Apr 13, 1986

First & Last Dates — Williston

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)
167 days
Longest growing season
1922
73 days
Shortest growing season
1908
121 days
Normal growing season
1991–2020 average

Top 10 Record Highs — September 11

# Temp Date
🏆 94°F September 11, 1939
2 93°F September 11, 1908
3 91°F September 11, 1990
4 91°F September 11, 1966
5 91°F September 11, 1948
6 90°F September 11, 1976
7 89°F September 11, 2011
8 89°F September 11, 1971
9 88°F September 11, 2017
10 88°F September 11, 1981

Top 5 Record Lows — September 11

# Temp Date
🥶 24°F September 11, 1964
2 29°F September 11, 1955
3 30°F September 11, 1910
4 32°F September 11, 2014
5 32°F September 11, 1996
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 1894–2026. Climate normals represent the 1991–2020 average.

Heat Wave Summary — Williston

threshold: 93°F (90th percentile of historical Jun–Aug highs)
3.8
Avg heat wave length
days (historical)
100°
Avg peak temp
during heat waves
0
Dangerous nights 2026
Overnights ≥ 70°F
1
Heat waves 2026
so far

Days ≥ 90°F Per Year

1894–2026
19
2026 so far
20
Avg/year 1970–2025
23
Avg/year (last 10 complete)
47
Most in a year (1983)

Average Daily High by Decade

Full year · complete decades only

Longest Heat Waves — Williston

# Dates Days Peak Avg High Avg Overnight Low
🏆 Aug 11, 2003 – Aug 19, 2003 9 103°F (Aug 14) 99°F 69°F
2 Aug 1, 1983 – Aug 7, 1983 7 107°F (Aug 6) 102°F 66°F
3 Jul 21, 1931 – Jul 27, 1931 7 105°F (Jul 25) 100°F 67°F
4 Aug 8, 1940 – Aug 14, 1940 7 99°F (Aug 9) 95°F 65°F
5 Aug 7, 2018 – Aug 12, 2018 6 108°F (Aug 12) 100°F 58°F
6 Jun 3, 1988 – Jun 8, 1988 6 105°F (Jun 7) 100°F 67°F
7 Jun 23, 1936 – Jun 28, 1936 6 104°F (Jun 24) 96°F 63°F
8 Aug 27, 1983 – Sep 1, 1983 6 104°F (Sep 1) 99°F 62°F
9 Jul 24, 1933 – Jul 29, 1933 6 103°F (Jul 26) 98°F 64°F
10 Aug 20, 1969 – Aug 25, 1969 6 103°F (Aug 22) 98°F 64°F

Heat Waves Per Year

Warm Summer Nights (Jun–Aug)

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

56
2026 total
above-normal nights
46.2
Avg / summer
1970–2020
76
Most in a summer
2021

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 (1894–2026)

Blue = above average · tan = below average · gold = 2026 (partial)
Since 1894, annual totals have trended -0.02" per decade, about -0.2" 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 Williston is tracking against normal, year to date

Daily High Temperature vs Normal

Above normal Below normal

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

Precipitation, Year to Date

11.31"
2026 YTD
Normal: 12.02"
-0.71"
1.26"
September so far
September normal: 1.36"
-0.10"
1
2026 heavy rain days
Days with ≥ 1.0"

Accumulation vs. Normal

Running total since Jan 1 against the normal pace for the same date · Williston is 0.71" behind 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)
68.1°F
Average temperature
32nd-warmest of 131
+1.6°
vs. average
Normal: 66.6°F (1991–2020)
3.81"
Precipitation
6th-wettest of 130
+2.22"
vs. average
Normal: 1.59" · 240% of normal

Average Temperature by Year — Aug 11 – Sep 10

1894–2026 · 2026 highlighted · trend +0.28° per decade (warming since 1894)

Precipitation by Year — Aug 11 – Sep 10

1894–2026 · 2026 highlighted · trend +0.01" per decade (wetter since 1894)

Warmest Aug 11 – Sep 10 on Record

# Year Avg Temp
1 1983 73.4°F
2 2003 73.0°F
3 2022 72.6°F
4 1981 72.5°F
5 1991 72.0°F
6 2013 72.0°F
7 1998 71.5°F
8 1937 70.9°F
9 1931 70.8°F
10 2024 70.7°F

Coolest Aug 11 – Sep 10 on Record

# Year Avg Temp
1 1910 57.6°F
2 1974 59.0°F
3 1992 59.8°F
4 1914 60.0°F
5 1896 60.3°F
6 1964 60.6°F
7 1968 60.6°F
8 1928 60.7°F
9 1965 60.7°F
10 1903 60.9°F

Wettest Aug 11 – Sep 10 on Record

# Year Total
1 2019 4.58"
2 1993 4.56"
3 1903 4.44"
4 1951 4.20"
5 1927 3.82"
6 2026 3.81"
7 1900 3.71"
8 1918 3.69"
9 1913 3.66"
10 1968 3.65"

Driest Aug 11 – Sep 10 on Record

# Year Total
1 2001 0.06"
2 1899 0.06"
3 1948 0.11"
4 1937 0.11"
5 2012 0.13"
6 1976 0.15"
7 1940 0.15"
8 1931 0.19"
9 1923 0.20"
10 2025 0.22"
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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