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Built 2026-10-17 (17 October 2026)

McCook Ridge Weather Records (USR0000MCCO)

Record envelope, standing records and threshold days for McCook Ridge (USR0000MCCO), Utah, United States, with 41 years of record.

Key Facts for McCook Ridge

  • McCook Ridge (USR0000MCCO) is a weather station in Utah, United States at 39.63 latitude and -109.27 longitude, 2,134 m (7,000 ft) above sea level.
  • The station reports from 1983 to 2023, 41 years of record.
  • 1,464 records set at McCook Ridge still stand.
  • Records are tracked for tmax, tmin: an element needs 30 years of data to be eligible.
  • McCook Ridge set a daily record high minimum temperature of 10.6 C (51.1 F) on 8 October 2026 (provisional).

Provisional Records

Records set in the last 60 days are provisional until they clear the revision window.

About the Station

  • Location: Utah, United States, 39.63 latitude, -109.27 longitude.
  • Elevation: 2,134 m (7,000 ft).
  • Period of record: 1983 to 2023, 41 years.
  • Eligible elements: tmax, tmin.

Daily Record Envelope and 2026

35 days at or beyond a record
Daily record high and record low at McCook Ridge, with 2026 drawn through them The band shows the record high and record low for each calendar day at McCook Ridge. The lines show the 2026 daily maximum and minimum. 35 days in 2026 matched or passed a record. Temperatures are in degrees Celsius. -40-2002040 JanFebMarAprMayJunJulAugSepOctNovDec
The band shows the record high and record low for each calendar day at McCook Ridge. The lines show the 2026 daily maximum and minimum. 35 days in 2026 matched or passed a record. Temperatures are in degrees Celsius.
Daily record high and record low at McCook Ridge, with 2026 drawn through them
MonthHighest record highLowest record low2026 highest maximum2026 lowest minimum
Jan16.1 C (61.0 F)-26.0 C (-14.8 F)0.0 C (32.0 F)-24.4 C (-11.9 F)
Feb17.8 C (64.0 F)-29.4 C (-20.9 F)16.1 C (61.0 F)-22.8 C (-9.0 F)
Mar27.2 C (81.0 F)-21.1 C (-6.0 F)27.2 C (81.0 F)-6.1 C (21.0 F)
Apr27.8 C (82.0 F)-15.6 C (3.9 F)22.8 C (73.0 F)-7.2 C (19.0 F)
May35.0 C (95.0 F)-6.1 C (21.0 F)29.4 C (84.9 F)-2.8 C (27.0 F)
Jun37.2 C (99.0 F)-1.1 C (30.0 F)32.8 C (91.0 F)5.6 C (42.1 F)
Jul37.8 C (100.0 F)4.4 C (39.9 F)36.7 C (98.1 F)10.0 C (50.0 F)
Aug36.1 C (97.0 F)2.2 C (36.0 F)35.6 C (96.1 F)9.4 C (48.9 F)
Sep35.0 C (95.0 F)-5.6 C (21.9 F)30.0 C (86.0 F)6.7 C (44.1 F)
Oct28.3 C (82.9 F)-18.3 C (-0.9 F)26.7 C (80.1 F)7.8 C (46.0 F)
Nov21.7 C (71.1 F)-20.0 C (-4.0 F)n/an/a
Dec16.7 C (62.1 F)-31.7 C (-25.1 F)n/an/a

Which Years Hold Standing Records

1,464 standing records
Standing records at McCook Ridge by the year they were set 1,464 records at McCook Ridge still stand. 1989 holds the most, with 64. 0204060801983: 91984: 281985: 461986: 371987: 301988: 351989: 641990: 461991: 341992: 381993: 151994: 191995: 411996: 481997: 291998: 291999: 392000: 442001: 322002: 352003: 442004: 222005: 322006: 222007: 342008: 322009: 352010: 272011: 202012: 232013: 272014: 382015: 342016: 152017: 452018: 282019: 202020: 452021: 392022: 412023: 232024: 172025: 502026: 53198319881993199820032008201320182023
1,464 records at McCook Ridge still stand. 1989 holds the most, with 64.
Standing records at McCook Ridge by the year they were set
Year setStanding records
19839
198428
198546
198637
198730
198835
198964
199046
199134
199238
199315
199419
199541
199648
199729
199829
199939
200044
200132
200235
200344
200422
200532
200622
200734
200832
200935
201027
201120
201223
201327
201438
201534
201615
201745
201828
201920
202045
202139
202241
202323
202417
202550
202653

Period of Record Coverage

1983 to 2026
Days with data per year at McCook Ridge 44 years of record at McCook Ridge, 1983 to 2026. 7 years have data for under 90 percent of days and are left out of rankings: 1983, 1984, 1987, 1993, 2012, 2013, 2026. 1983: 134 of 365 days1984: 317 of 366 days1985: 350 of 365 days1986: 355 of 365 days1987: 249 of 365 days1988: 362 of 366 days1989: 365 of 365 days1990: 361 of 365 days1991: 355 of 365 days1992: 345 of 366 days1993: 257 of 365 days1994: 364 of 365 days1995: 362 of 365 days1996: 365 of 366 days1997: 362 of 365 days1998: 365 of 365 days1999: 364 of 365 days2000: 365 of 366 days2001: 365 of 365 days2002: 365 of 365 days2003: 364 of 365 days2004: 365 of 366 days2005: 365 of 365 days2006: 363 of 365 days2007: 365 of 365 days2008: 366 of 366 days2009: 365 of 365 days2010: 364 of 365 days2011: 363 of 365 days2012: 323 of 366 days2013: 272 of 365 days2014: 364 of 365 days2015: 365 of 365 days2016: 365 of 366 days2017: 364 of 365 days2018: 365 of 365 days2019: 364 of 365 days2020: 365 of 366 days2021: 365 of 365 days2022: 363 of 365 days2023: 364 of 365 days2024: 366 of 366 days2025: 347 of 365 days2026: 270 of 365 days1990200020102020
44 years of record at McCook Ridge, 1983 to 2026. 7 years have data for under 90 percent of days and are left out of rankings: 1983, 1984, 1987, 1993, 2012, 2013, 2026.
Days with data per year at McCook Ridge
YearDays with dataShare of yearComplete
198313437%No
198431787%No
198535096%Yes
198635597%Yes
198724968%No
198836299%Yes
1989365100%Yes
199036199%Yes
199135597%Yes
199234594%Yes
199325770%No
1994364100%Yes
199536299%Yes
1996365100%Yes
199736299%Yes
1998365100%Yes
1999364100%Yes
2000365100%Yes
2001365100%Yes
2002365100%Yes
2003364100%Yes
2004365100%Yes
2005365100%Yes
200636399%Yes
2007365100%Yes
2008366100%Yes
2009365100%Yes
2010364100%Yes
201136399%Yes
201232388%No
201327275%No
2014364100%Yes
2015365100%Yes
2016365100%Yes
2017364100%Yes
2018365100%Yes
2019364100%Yes
2020365100%Yes
2021365100%Yes
202236399%Yes
2023364100%Yes
2024366100%Yes
202534795%Yes
202627074%No

Latest Records

20
Latest records at McCook Ridge
DateStationRecordValueBeat old record byOld record stoodSignificance
8 October 2026McCook Ridge, USdaily high min (Provisional)10.6 C (51.1 F)0.6 C (1.1 F)23 years11 of 100 (Routine)
7 October 2026McCook Ridge, USdaily high min (Provisional)11.1 C (52.0 F)0.5 C (0.9 F)24 years11 of 100 (Routine)
7 October 2026McCook Ridge, USdaily high max (Tie, Provisional)25.6 C (78.1 F)tie39 years3 of 100 (Routine)
6 October 2026McCook Ridge, USdaily high min (Provisional)13.3 C (55.9 F)3.3 C (5.9 F)27 years18 of 100 (Routine)
6 October 2026McCook Ridge, USdaily high max (Provisional)26.1 C (79.0 F)0.5 C (0.9 F)5 years5 of 100 (Routine)
5 October 2026McCook Ridge, USdaily high min (Provisional)12.8 C (55.0 F)1.1 C (2.0 F)19 years11 of 100 (Routine)
5 October 2026McCook Ridge, USdaily high max (Provisional)26.7 C (80.1 F)1.1 C (2.0 F)5 years6 of 100 (Routine)
27 September 2026McCook Ridge, USdaily high min (Tie, Provisional)14.4 C (57.9 F)tie11 years1 of 100 (Routine)
13 September 2026McCook Ridge, USdaily high min (Provisional)18.3 C (64.9 F)2.7 C (4.9 F)4 years11 of 100 (Routine)
12 September 2026McCook Ridge, USdaily high min (Provisional)17.8 C (64.0 F)1.1 C (2.0 F)21 years12 of 100 (Routine)
31 August 2026McCook Ridge, USdaily low max (Tie, Provisional)18.9 C (66.0 F)tie33 years3 of 100 (Routine)
9 August 2026McCook Ridge, USdaily high min19.4 C (66.9 F)1.1 C (2.0 F)13 years12 of 100 (Routine)
8 August 2026McCook Ridge, USdaily high max (Tie)33.9 C (93.0 F)tie13 years2 of 100 (Routine)
7 August 2026McCook Ridge, USdaily high max35.6 C (96.1 F)1.2 C (2.2 F)28 years15 of 100 (Routine)
26 July 2026McCook Ridge, USdaily high min20.6 C (69.1 F)1.7 C (3.1 F)17 years14 of 100 (Routine)
25 July 2026McCook Ridge, USdaily high max35.6 C (96.1 F)1.2 C (2.2 F)23 years13 of 100 (Routine)
13 July 2026McCook Ridge, USdaily high min21.7 C (71.1 F)1.1 C (2.0 F)5 years8 of 100 (Routine)
6 July 2026McCook Ridge, USdaily high min20.6 C (69.1 F)0.6 C (1.1 F)8 years8 of 100 (Routine)
29 June 2026McCook Ridge, USdaily low min (Tie)7.2 C (45.0 F)tie29 years3 of 100 (Routine)
24 May 2026McCook Ridge, USdaily high min (Tie)12.2 C (54.0 F)tie20 years2 of 100 (Routine)

Climate Trend

35 complete years, 1985 to 2025
Annual mean temperature at McCook Ridge as warming stripes, 1985 to 2025 One stripe for each of 35 complete years at McCook Ridge, 1985 to 2025. Blue stripes are years cooler than the station's own mean of 9.0 C (48.2 F); red stripes are warmer. The coolest year was 1991, at 7.4 C (45.2 F), and the warmest was 2024, at 10.2 C (50.3 F). The strongest colour marks a difference of 1.7 C (3.1 F). 1985: 7.4 C, -1.6 C from the station mean1986: 8.4 C, -0.6 C from the station mean1988: 8.2 C, -0.8 C from the station mean1989: 8.6 C, -0.4 C from the station mean1990: 8.6 C, -0.4 C from the station mean1991: 7.4 C, -1.6 C from the station mean1994: 9.1 C, +0.1 C from the station mean1995: 9.1 C, +0.1 C from the station mean1996: 9.1 C, +0.1 C from the station mean1997: 7.9 C, -1.2 C from the station mean1998: 8.9 C, -0.1 C from the station mean1999: 9.5 C, +0.5 C from the station mean2001: 9.9 C, +0.9 C from the station mean2002: 9.1 C, +0.1 C from the station mean2003: 9.9 C, +0.9 C from the station mean2004: 9.0 C, 0.0 C from the station mean2005: 9.4 C, +0.3 C from the station mean2006: 9.2 C, +0.2 C from the station mean2007: 9.7 C, +0.7 C from the station mean2008: 8.5 C, -0.5 C from the station mean2009: 8.7 C, -0.3 C from the station mean2010: 8.7 C, -0.3 C from the station mean2011: 8.1 C, -0.9 C from the station mean2014: 9.7 C, +0.7 C from the station mean2015: 9.7 C, +0.7 C from the station mean2016: 9.7 C, +0.6 C from the station mean2017: 10.1 C, +1.1 C from the station mean2018: 9.8 C, +0.8 C from the station mean2019: 8.4 C, -0.6 C from the station mean2020: 9.8 C, +0.7 C from the station mean2021: 10.1 C, +1.1 C from the station mean2022: 8.9 C, -0.1 C from the station mean2023: 8.4 C, -0.6 C from the station mean2024: 10.2 C, +1.2 C from the station mean2025: 8.2 C, -0.8 C from the station mean198519901995200020052010201520202025
One stripe for each of 35 complete years at McCook Ridge, 1985 to 2025. Blue stripes are years cooler than the station's own mean of 9.0 C (48.2 F); red stripes are warmer. The coolest year was 1991, at 7.4 C (45.2 F), and the warmest was 2024, at 10.2 C (50.3 F). The strongest colour marks a difference of 1.7 C (3.1 F).
Annual mean temperature at McCook Ridge as warming stripes, 1985 to 2025
YearAnnual mean temperatureDifference from the station mean
19857.4 C-1.58 C
19868.4 C-0.64 C
19888.2 C-0.83 C
19898.6 C-0.44 C
19908.6 C-0.44 C
19917.4 C-1.64 C
19949.1 C+0.13 C
19959.1 C+0.06 C
19969.1 C+0.14 C
19977.9 C-1.15 C
19988.9 C-0.12 C
19999.5 C+0.52 C
20019.9 C+0.91 C
20029.1 C+0.11 C
20039.9 C+0.91 C
20049.0 C+0.01 C
20059.4 C+0.35 C
20069.2 C+0.24 C
20079.7 C+0.68 C
20088.5 C-0.47 C
20098.7 C-0.33 C
20108.7 C-0.33 C
20118.1 C-0.90 C
20149.7 C+0.74 C
20159.7 C+0.69 C
20169.7 C+0.65 C
201710.1 C+1.13 C
20189.8 C+0.82 C
20198.4 C-0.63 C
20209.8 C+0.75 C
202110.1 C+1.07 C
20228.9 C-0.08 C
20238.4 C-0.62 C
202410.2 C+1.18 C
20258.2 C-0.81 C

The annual mean temperature here has risen by 0.3 C (0.1 to 0.5) per decade over 1985 to 2025. In Fahrenheit: 0.5 F (0.2 to 0.9) per decade. The slope is a straight line fitted to 35 complete years; the brackets give its 95 percent interval.

Fitted temperature trends per decade at McCook Ridge
MeasurePer decade (C)Per decade (F)PeriodComplete yearsReading
Annual mean temperature0.3 C (0.1 to 0.5) per decade0.5 F (0.2 to 0.9) per decade1985 to 202535Rise
Mean daily maximum0.3 C (0.1 to 0.6) per decade0.6 F (0.2 to 1.0) per decade1985 to 202535Rise
Mean daily minimum0.23 C (0.03 to 0.42) per decade0.4 F (0.1 to 0.8) per decade1985 to 202535Rise

A year is complete when all 12 months have at least 20 days of both daily maximum and daily minimum readings. The annual mean is the mean of the monthly means. The trend describes this one station over this period; it does not say what caused the change.

Extremes by Year

1983 to 2026
Yearly extremes at McCook Ridge: the record and the median year
MeasureRecordYear of the recordMedian yearYears with a value
Hottest day (TXx)37.8 C (100.0 F)200235.0 C (95.0 F)44
Coldest night (TNn)-31.7 C (-25.1 F)1990-20.8 C (-5.5 F)44

Hottest day (TXx)

Hottest day (TXx) at McCook Ridge by year The hottest day of the year at McCook Ridge, 1983 to 2026. The record is 37.8 C (100.0 F) in 2002, marked on the chart; the median year is 35.0 C (95.0 F). 323436381990200020102020Record: 37.8 C (100.0 F) in 2002
The hottest day of the year at McCook Ridge, 1983 to 2026. The record is 37.8 C (100.0 F) in 2002, marked on the chart; the median year is 35.0 C (95.0 F).
Hottest day (TXx) at McCook Ridge by year
YearHottest day (TXx)
198332.0 C (89.6 F)
198432.0 C (89.6 F)
198534.4 C (93.9 F)
198632.8 C (91.0 F)
198733.3 C (91.9 F)
198833.3 C (91.9 F)
198936.1 C (97.0 F)
199034.4 C (93.9 F)
199132.2 C (90.0 F)
199232.2 C (90.0 F)
199332.2 C (90.0 F)
199434.4 C (93.9 F)
199535.0 C (95.0 F)
199634.4 C (93.9 F)
199733.3 C (91.9 F)
199836.7 C (98.1 F)
199933.9 C (93.0 F)
200036.1 C (97.0 F)
200135.6 C (96.1 F)
200237.8 C (100.0 F)
200337.8 C (100.0 F)
200436.1 C (97.0 F)
200537.2 C (99.0 F)
200636.1 C (97.0 F)
200735.6 C (96.1 F)
200836.1 C (97.0 F)
200935.0 C (95.0 F)
201035.6 C (96.1 F)
201133.9 C (93.0 F)
201235.0 C (95.0 F)
201337.2 C (99.0 F)
201435.6 C (96.1 F)
201535.0 C (95.0 F)
201636.1 C (97.0 F)
201734.4 C (93.9 F)
201835.0 C (95.0 F)
201935.0 C (95.0 F)
202036.1 C (97.0 F)
202137.2 C (99.0 F)
202235.0 C (95.0 F)
202337.2 C (99.0 F)
202436.1 C (97.0 F)
202535.6 C (96.1 F)
202636.7 C (98.1 F)

Coldest night (TNn)

Coldest night (TNn) at McCook Ridge by year The coldest night of the year at McCook Ridge, 1983 to 2026. The record is -31.7 C (-25.1 F) in 1990, marked on the chart; the median year is -20.8 C (-5.5 F). -40-30-20-1001990200020102020Record: -31.7 C (-25.1 F) in 1990
The coldest night of the year at McCook Ridge, 1983 to 2026. The record is -31.7 C (-25.1 F) in 1990, marked on the chart; the median year is -20.8 C (-5.5 F).
Coldest night (TNn) at McCook Ridge by year
YearColdest night (TNn)
1983-3.0 C (26.6 F)
1984-17.0 C (1.4 F)
1985-27.0 C (-16.6 F)
1986-20.0 C (-4.0 F)
1987-23.3 C (-9.9 F)
1988-20.0 C (-4.0 F)
1989-27.8 C (-18.0 F)
1990-31.7 C (-25.1 F)
1991-19.4 C (-2.9 F)
1992-18.9 C (-2.0 F)
1993-17.2 C (1.0 F)
1994-21.1 C (-6.0 F)
1995-17.2 C (1.0 F)
1996-21.1 C (-6.0 F)
1997-21.1 C (-6.0 F)
1998-24.4 C (-11.9 F)
1999-17.8 C (0.0 F)
2000-15.6 C (3.9 F)
2001-17.8 C (0.0 F)
2002-21.1 C (-6.0 F)
2003-19.4 C (-2.9 F)
2004-21.1 C (-6.0 F)
2005-22.2 C (-8.0 F)
2006-18.3 C (-0.9 F)
2007-23.3 C (-9.9 F)
2008-20.0 C (-4.0 F)
2009-21.1 C (-6.0 F)
2010-22.2 C (-8.0 F)
2011-29.4 C (-20.9 F)
2012-15.6 C (3.9 F)
2013-23.3 C (-9.9 F)
2014-25.0 C (-13.0 F)
2015-23.9 C (-11.0 F)
2016-20.6 C (-5.1 F)
2017-24.4 C (-11.9 F)
2018-19.4 C (-2.9 F)
2019-21.1 C (-6.0 F)
2020-18.9 C (-2.0 F)
2021-18.9 C (-2.0 F)
2022-20.6 C (-5.1 F)
2023-21.7 C (-7.1 F)
2024-15.6 C (3.9 F)
2025-20.6 C (-5.1 F)
2026-24.4 C (-11.9 F)

Each chart shows one value per year; the dot marks the record year. TXx is the hottest daily maximum, TNn the coldest daily minimum, Rx1day and Rx5day the largest one-day and five-day rain totals, and CDD the longest run of days with less than 1 mm of rain. A year with missing days can understate an extreme.

Frost Dates and Growing Season

35 years with a frost

Across 35 years with a frost, the median last spring frost at McCook Ridge falls on 20 May and the median first autumn frost on 28 September, which leaves a median of 131 days between them.

Fitted over all years, the growing season changes by +6.5 days per decade at this station.

Frost dates and growing season at McCook Ridge
MeasureMedian, all yearsEarliest periodRecent period (1991 to 2025)Recent against earliestFitted trend
Last spring frost20 Mayn/a16 Mayn/a-2.5 days per decade
First autumn frost28 Septembern/a1 Octobern/a+4.1 days per decade
Growing days131 daysn/a135 daysn/a+6.5 days per decade

A frost day is a day with a daily minimum at or below 0 C (32 F). The last spring frost and the first autumn frost are the last and first such days of the cold season, and growing days are the days between them. A negative trend for the last spring frost means it comes earlier.

Download the Data

  • Data for McCook Ridge standing records by year: CSV or JSON. Field meanings are on the data page.
  • Data for McCook Ridge threshold days by year: CSV or JSON. Field meanings are on the data page.

Source: NOAA National Centers for Environmental Information, Global Historical Climatology Network Daily (GHCN-Daily). Records are computed by World Extreme Weather Monitor and are not official NOAA products. (US Government open data (NOAA NCEI)) Data as of 2026-10-15 (15 October 2026). Records are computed by this site and are not official.

Data as of . Last revised (2026-10-15).