Sheridan, WY

Wyoming · Records since 1907–2026

☀️ 70°F Feels like 65°
Currently in Sheridan
As of 12:30 PM MDT

Records for September 11

🔥 Record High

96°F

September 11, 1971

+18° from 78° normal

❄ Record Low

21°F

September 11, 1921

-23° from 44° normal
🌞 Normal high: 78°F 🌑 Normal low: 44°F 1991–2020 normals

All-Time Records — Sheridan

🔥
109°F
Hottest Day Ever
Jul 12, 2026
❄
-41°F
Coldest Day Ever
Dec 9, 1919
🌧
3.32"
Wettest Day Ever
Jun 3, 1944
☃
22.7"
Most Snow in One Day
Apr 3, 1955

First & Last Dates — Sheridan

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)
165 days
Longest growing season
2023
81 days
Shortest growing season
1910
121 days
Normal growing season
1991–2020 average

Top 10 Record Highs — September 11

# Temp Date
🏆 96°F September 11, 1971
2 95°F September 11, 1954
3 94°F September 11, 1959
4 91°F September 11, 2017
5 91°F September 11, 1993
6 91°F September 11, 1990
7 91°F September 11, 1948
8 91°F September 11, 1939
9 91°F September 11, 1919
10 90°F September 11, 1981

Top 5 Record Lows — September 11

# Temp Date
🥶 21°F September 11, 1921
2 23°F September 11, 2014
3 24°F September 11, 1989
4 32°F September 11, 1964
5 32°F September 11, 1929
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 1907–2026. Climate normals represent the 1991–2020 average.

Heat Wave Summary — Sheridan

threshold: 95°F (90th percentile of historical Jun–Aug highs)
4.3
Avg heat wave length
days (historical)
101°
Avg peak temp
during heat waves
1
Dangerous nights 2026
Overnights ≥ 70°F
2
Heat waves 2026
so far

Days ≥ 90°F Per Year

1907–2026
40
2026 so far
29
Avg/year 1970–2025
42
Avg/year (last 10 complete)
63
Most in a year (1936)

Average Daily High by Decade

Full year · complete decades only

Longest Heat Waves — Sheridan

# Dates Days Peak Avg High Avg Overnight Low
🏆 Jul 14, 1936 – Jul 25, 1936 12 104°F (Jul 18) 99°F 62°F
2 Aug 2, 1983 – Aug 11, 1983 10 106°F (Aug 7) 100°F 64°F
3 Jun 17, 1988 – Jun 26, 1988 10 105°F (Jun 26) 99°F 63°F
4 Jul 2, 1936 – Jul 10, 1936 9 104°F (Jul 5) 100°F 61°F
5 Aug 25, 1983 – Sep 1, 1983 8 103°F (Sep 1) 98°F 58°F
6 Jul 21, 1931 – Jul 27, 1931 7 103°F (Jul 23) 101°F 60°F
7 Aug 10, 2003 – Aug 16, 2003 7 102°F (Aug 13) 100°F 60°F
8 Jul 11, 2002 – Jul 16, 2002 6 107°F (Jul 14) 101°F 59°F
9 Jul 13, 2022 – Jul 18, 2022 6 104°F (Jul 17) 100°F 57°F
10 Jul 18, 1960 – Jul 23, 1960 6 103°F (Jul 19) 100°F 64°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
45.6
Avg / summer
1970–2020
77
Most in a summer
1941

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 (1907–2026)

Blue = above average · tan = below average · gold = 2026 (partial)
Since 1907, annual totals have trended -0.09" per decade, about -1.1" 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 Sheridan is tracking against normal, year to date

Daily High Temperature vs Normal

Above normal Below normal

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

Precipitation, Year to Date

8.26"
2026 YTD
Normal: 10.98"
-2.72"
0.00"
September so far
September normal: 1.47"
-1.47"
0
2026 heavy rain days
Days with ≥ 1.0"

Accumulation vs. Normal

Running total since Jan 1 against the normal pace for the same date · Sheridan is 2.72" behind the normal pace

Period Review — Sep 1 – Sep 10, 2026

Any window, evaluated against every other year on record — 10 days

Quick picks: Last 7 days Last 30 days Last 90 days This month
Seasons: Spring (Mar–May) Summer (Jun–Aug) Fall (Sep–Nov)
67.2°F
Average temperature
21st-warmest of 120
+3.5°
vs. average
Normal: 63.7°F (1991–2020)
0.00"
Precipitation
1st-driest of 120
-0.44"
vs. average
Normal: 0.44" · 0% of normal

Average Temperature by Year — Sep 1 – Sep 10

1907–2026 · 2026 highlighted · trend +0.38° per decade (warming since 1907)

Precipitation by Year — Sep 1 – Sep 10

1907–2026 · 2026 highlighted

Warmest Sep 1 – Sep 10 on Record

# Year Avg Temp
1 1998 74.9°F
2 2013 71.7°F
3 1990 71.4°F
4 2024 71.0°F
5 1978 70.7°F
6 2022 70.2°F
7 1982 70.0°F
8 1940 69.3°F
9 1931 69.2°F
10 1942 69.1°F

Coolest Sep 1 – Sep 10 on Record

# Year Avg Temp
1 2008 51.4°F
2 1929 51.6°F
3 1962 52.8°F
4 1918 53.7°F
5 1910 54.6°F
6 1943 55.6°F
7 1964 55.8°F
8 1965 56.4°F
9 1921 56.8°F
10 1941 56.8°F

Wettest Sep 1 – Sep 10 on Record

# Year Total
1 1926 2.56"
2 1999 2.41"
3 1973 2.30"
4 1915 2.26"
5 2022 1.84"
6 1968 1.69"
7 2001 1.59"
8 2023 1.58"
9 1986 1.50"
10 2008 1.50"

Driest Sep 1 – Sep 10 on Record

# Year Total
1 2026 0.00"
2 2021 0.00"
3 2017 0.00"
4 2012 0.00"
5 2011 0.00"
6 2009 0.00"
7 2006 0.00"
8 2005 0.00"
9 1996 0.00"
10 1969 0.00"
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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