PlainHazard

Wyoming heat

Every recorded heat record since 1996 · 15 counties with a record

NOAA's Storm Events Database records 78 heat records in Wyoming from 1996 through June 30, 2026, about 12 a year since 2000. Wyoming ranks 43rd of 51 states and territories by count and 46th of 50 per square mile.

Heat in Wyoming, 1996 to 2026

Heat records per year (NOAA Storm Events); 2026 to June 30, 2026.

  • recorded, no damage figure
  • under $1 million
  • $1 million or more
  • $10 million or more
  • $100 million or more, or 10 deaths
  • $1 billion or more, or 100 deaths
  • a year's colour: its recorded damage or deaths
  • a year with a death
Records
781996 to June 30, 2026
A year since 2000
12average
Deaths
00 injuries
Damage, 2025 dollars
–as filed
Busiest year
202133 records

Source: NOAA NCEI Storm Events Database, records through June 30, 2026; deaths and damage as filed, damage in 2025 dollars. Search the record at NCEI.

Are heat records common in Wyoming?

Wyoming averages about 12 heat records a year since 2000, 43rd of 51 states and territories by count. The busiest year on record was 2021 (33). Per 10,000 square miles of land, Wyoming records 8.0 heat records since 1996, 46th of 50 states and territories by that measure.

  1. 1. New Jersey 2320
  2. 2. Delaware 1555
  3. 3. Maryland 1330
  4. 4. Oklahoma 685
  5. 5. Illinois 590
  6. 6. Mississippi 584
  7. 7. Louisiana 576
  8. 8. Missouri 547
  9. 9. Tennessee 540
  10. 10. Puerto Rico 537
  11. 46. Wyoming 8.0

Source: NOAA NCEI Storm Events Database, records since 1996, per 10,000 square miles of land area (Census Bureau 2024 Gazetteer; places under 1,000 square miles not ranked). Damage colours: Storm Events damage, 2025 dollars.

Which counties in Wyoming have the most heat records?

Per square mile, Washakie County leads Wyoming: 8 days with a heat record since 1996, 3.6 per 1,000 square miles of land. By raw count, Fremont County has the most heat records (22 since 1996); large counties collect more records simply by covering more ground, so the ranking counts days with a record per unit of area (a storm filed for several forecast zones adds several records but one day).

  1. Washakie County 3.6 (8)
  2. Big Horn County 1.9 (6)
  3. Natrona County 1.5 (9)
  4. Lincoln County 1.5 (9)
  5. Johnson County 1.4 (7)
  6. Sublette County 1.2 (7)
  7. Fremont County 1.2 (22)
  8. Teton County 1.0 (5)
  9. Goshen County 0.9 (2)
  10. Park County 0.9 (11)
  11. Sweetwater County 0.8 (16)
  12. Laramie County 0.7 (2)

Source: NOAA NCEI Storm Events Database, days with a record in the county since 1996 per 1,000 square miles of land (Census Bureau 2024 Gazetteer); in brackets, the count of records.

When is the heat season in Wyoming?

45% of its heat records since 1996 fell in June and July. The busiest month is September (24 records).

The values, month by month

Jan 0 · Feb 0 · Mar 9 · Apr 0 · May 0 · Jun 19 · Jul 16 · Aug 1 · Sep 24 · Oct 0 · Nov 0 · Dec 9 (records).

Source: NOAA NCEI Storm Events Database, records by the month they began, since 1996.

Are heat records becoming more frequent in Wyoming?

Wyoming's count per decade against the whole country's, and its share. NOAA recorded every event type only from 1996, so earlier decades are not comparable; the share of the national total is the fairer comparison across decades.

Heat: Wyoming and the United States by decade (2020s to June 30, 2026)
DecadeWyomingUnited StatesWyoming's share
1996-9904,3550
2000s09,1630
2010s316,4450.02%
2020-267526,7960.28%

Source: NOAA NCEI Storm Events Database.

The most recent heat records in Wyoming

The 12 most recent records, to June 30, 2026
DateRecordCharacterKilledInjuredDamage
2026-03-17 HeatWashakie County · forecast zone Southeast Big Horn Basin 0 0 –
2026-03-17 HeatSweetwater County · forecast zone East Sweetwater County 0 0 –
2026-03-17 HeatFremont County · forecast zone Wind River Basin 0 0 –
2026-03-17 HeatFremont County · forecast zone Lander Foothills 0 0 –
2026-03-17 HeatFremont County and 3 more · forecast zone Yellowstone National Park 0 0 –
2026-03-17 HeatBig Horn County and Park County · forecast zone North Big Horn Basin 0 0 –
2026-03-17 HeatNatrona County · forecast zone Natrona County Lower Elevations 0 0 –
2026-03-17 HeatJohnson County · forecast zone Northeast Johnson County 0 0 –
2026-03-17 HeatFremont County and 3 more · forecast zone Upper Green River Basin 0 0 –
2025-12-01 HeatWashakie County · forecast zone Southeast Big Horn Basin 0 0 –
2025-12-01 HeatSweetwater County · forecast zone East Sweetwater County 0 0 –
2025-12-01 HeatFremont County · forecast zone Wind River Basin 0 0 –

Source: NOAA NCEI Storm Events Database, records through June 30, 2026; the newest months are revised by NCEI as reports arrive. Search the record at NCEI.

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