Lander, WY

Wyoming · Records since 1891–2026

☀️ 80°F Feels like 73°
Currently in Lander
As of 12:30 PM MDT

Records for September 11

🔥 Record High

88°F

September 11, 1990

+11° from 77° normal

❄ Record Low

26°F

September 11, 1898

-20° from 46° normal
🌞 Normal high: 77°F 🌑 Normal low: 46°F 1991–2020 normals

All-Time Records — Lander

🔥
102°F
Hottest Day Ever
Jul 12, 2026
❄
-40°F
Coldest Day Ever
Feb 8, 1936
🌧
3.48"
Wettest Day Ever
Jun 11, 1947
☃
28.6"
Most Snow in One Day
Apr 22, 1999

First & Last Dates — Lander

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)
170 days
Longest growing season
1987
55 days
Shortest growing season
1921
134 days
Normal growing season
1991–2020 average

Top 10 Record Highs — September 11

# Temp Date
🏆 88°F September 11, 1990
2 88°F September 11, 1919
3 87°F September 11, 2018
4 87°F September 11, 2004
5 87°F September 11, 1993
6 87°F September 11, 1971
7 87°F September 11, 1959
8 87°F September 11, 1948
9 87°F September 11, 1943
10 85°F September 11, 2016

Top 5 Record Lows — September 11

# Temp Date
🥶 26°F September 11, 1898
2 28°F September 11, 1921
3 28°F September 11, 1892
4 32°F September 11, 1974
5 32°F September 11, 1964
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 1891–2026. Climate normals represent the 1991–2020 average.

Heat Wave Summary — Lander

threshold: 92°F (90th percentile of historical Jun–Aug highs)
4.4
Avg heat wave length
days (historical)
96°
Avg peak temp
during heat waves
1
Dangerous nights 2026
Overnights ≥ 70°F
4
Heat waves 2026
so far

Days ≥ 90°F Per Year

1891–2026
38
2026 so far
20
Avg/year 1970–2025
34
Avg/year (last 10 complete)
51
Most in a year (2020)

Average Daily High by Decade

Full year · complete decades only

Longest Heat Waves — Lander

# Dates Days Peak Avg High Avg Overnight Low
🏆 Jul 15, 2007 – Jul 24, 2007 10 100°F (Jul 22) 96°F 62°F
2 Jun 28, 2001 – Jul 6, 2001 9 98°F (Jul 5) 96°F 61°F
3 Jul 26, 2008 – Aug 3, 2008 9 98°F (Aug 1) 95°F 59°F
4 Jun 24, 2002 – Jul 2, 2002 9 97°F (Jun 28) 95°F 60°F
5 Jul 22, 1966 – Jul 30, 1966 9 95°F (Jul 24) 94°F 59°F
6 Aug 1, 2001 – Aug 8, 2001 8 100°F (Aug 6) 95°F 61°F
7 Jun 19, 1988 – Jun 26, 1988 8 99°F (Jun 24) 95°F 64°F
8 Jun 23, 1990 – Jun 30, 1990 8 99°F (Jun 26) 97°F 61°F
9 Jul 16, 1901 – Jul 23, 1901 8 97°F (Jul 19) 94°F 55°F
10 Jul 4, 1976 – Jul 11, 1976 8 97°F (Jul 9) 94°F 59°F

Heat Waves Per Year

Warm Summer Nights (Jun–Aug)

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

68
2026 total
above-normal nights
49.1
Avg / summer
1970–2020
72
Most in a summer
2007

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 (1891–2026)

Blue = above average · tan = below average · gold = 2026 (partial)
Since 1891, annual totals have trended -0.03" per decade, about -0.3" 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 Lander is tracking against normal, year to date

Daily High Temperature vs Normal

Above normal Below normal

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

Precipitation, Year to Date

6.36"
2026 YTD
Normal: 9.65"
-3.29"
0.00"
September so far
September normal: 0.98"
-0.98"
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 · Lander is 3.29" behind the normal pace

Period Review — Mar 1 – May 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)
49.4°F
Average temperature
3rd-warmest of 135
+4.9°
vs. average
Normal: 44.5°F (1991–2020)
4.28"
Precipitation
38th-driest of 134
-1.73"
vs. average
Normal: 6.01" · 71% of normal

Average Temperature by Year — Mar 1 – May 31

1892–2026 · 2026 highlighted · trend +0.26° per decade (warming since 1892)

Precipitation by Year — Mar 1 – May 31

1892–2026 · 2026 highlighted · trend -0.01" per decade (drier since 1892)

Warmest Mar 1 – May 31 on Record

# Year Avg Temp
1 1992 49.9°F
2 2012 49.4°F
3 2026 49.4°F
4 1934 49.1°F
5 1994 48.4°F
6 1910 47.9°F
7 1985 47.8°F
8 2007 47.3°F
9 1986 47.2°F
10 1987 46.8°F

Coolest Mar 1 – May 31 on Record

# Year Avg Temp
1 1912 35.4°F
2 1917 36.9°F
3 1973 37.7°F
4 1924 38.0°F
5 1906 38.1°F
6 1909 38.2°F
7 1893 38.3°F
8 1920 38.4°F
9 1896 38.9°F
10 1975 39.0°F

Wettest Mar 1 – May 31 on Record

# Year Total
1 2016 14.23"
2 1957 12.57"
3 1971 11.02"
4 2017 10.11"
5 1924 9.95"
6 1898 9.83"
7 2019 9.83"
8 1944 9.67"
9 1995 9.40"
10 1906 9.34"

Driest Mar 1 – May 31 on Record

# Year Total
1 1919 1.36"
2 1925 1.76"
3 2001 1.99"
4 2006 2.05"
5 1911 2.06"
6 1985 2.14"
7 1960 2.20"
8 1948 2.48"
9 1982 2.85"
10 2020 2.99"
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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