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Built 2026-10-15 (15 October 2026)

Trail Gulch Idaho Weather Records (USR0000ITRA)

Record envelope, standing records and threshold days for Trail Gulch Idaho (USR0000ITRA), Idaho, United States, with 39 years of record.

Key Facts for Trail Gulch Idaho

  • Trail Gulch Idaho (USR0000ITRA) is a weather station in Idaho, United States at 42.32 latitude and -114.30 longitude, 1,829 m (6,000 ft) above sea level.
  • The station reports from 1985 to 2023, 39 years of record.
  • 1,464 records set at Trail Gulch Idaho still stand.
  • Records are tracked for tmax, tmin: an element needs 30 years of data to be eligible.
  • Trail Gulch Idaho set a daily record high minimum temperature of 17.2 C (63.0 F) on 9 October 2026 (provisional).

Provisional Records

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

About the Station

  • Location: Idaho, United States, 42.32 latitude, -114.30 longitude.
  • Elevation: 1,829 m (6,000 ft).
  • Period of record: 1985 to 2023, 39 years.
  • Eligible elements: tmax, tmin.

Daily Record Envelope and 2026

30 days at or beyond a record
Daily record high and record low at Trail Gulch Idaho, with 2026 drawn through them The band shows the record high and record low for each calendar day at Trail Gulch Idaho. The lines show the 2026 daily maximum and minimum. 30 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 Trail Gulch Idaho. The lines show the 2026 daily maximum and minimum. 30 days in 2026 matched or passed a record. Temperatures are in degrees Celsius.
Daily record high and record low at Trail Gulch Idaho, with 2026 drawn through them
MonthHighest record highLowest record low2026 highest maximum2026 lowest minimum
Jan16.7 C (62.1 F)-19.8 C (-3.6 F)11.7 C (53.1 F)-10.0 C (14.0 F)
Feb18.2 C (64.8 F)-24.9 C (-12.8 F)15.6 C (60.1 F)-8.3 C (17.1 F)
Mar24.5 C (76.1 F)-17.8 C (0.0 F)23.9 C (75.0 F)-5.6 C (21.9 F)
Apr29.4 C (84.9 F)-9.6 C (14.7 F)23.9 C (75.0 F)-5.6 C (21.9 F)
May34.4 C (93.9 F)-8.4 C (16.9 F)29.4 C (84.9 F)-1.1 C (30.0 F)
Jun35.6 C (96.1 F)-4.1 C (24.6 F)31.1 C (88.0 F)5.0 C (41.0 F)
Jul38.9 C (102.0 F)2.2 C (36.0 F)36.7 C (98.1 F)11.7 C (53.1 F)
Aug36.7 C (98.1 F)1.7 C (35.1 F)36.1 C (97.0 F)9.4 C (48.9 F)
Sep37.2 C (99.0 F)-1.7 C (28.9 F)29.4 C (84.9 F)5.6 C (42.1 F)
Oct32.8 C (91.0 F)-13.3 C (8.1 F)30.6 C (87.1 F)3.3 C (37.9 F)
Nov23.3 C (73.9 F)-16.7 C (1.9 F)n/an/a
Dec15.6 C (60.1 F)-28.8 C (-19.8 F)n/an/a

Which Years Hold Standing Records

1,464 standing records
Standing records at Trail Gulch Idaho by the year they were set 1,464 records at Trail Gulch Idaho still stand. 1991 holds the most, with 58. 02040601985: 321986: 221987: 461988: 531989: 371990: 551991: 581992: 351993: 471994: 381995: 411996: 381997: 231998: 191999: 382000: 182001: 372002: 372003: 512004: 252005: 192006: 342007: 312008: 392009: 342010: 302011: 232012: 292013: 372014: 362015: 502016: 362017: 362018: 192019: 192020: 352021: 342022: 382023: 192024: 342025: 442026: 38198519901995200020052010201520202025
1,464 records at Trail Gulch Idaho still stand. 1991 holds the most, with 58.
Standing records at Trail Gulch Idaho by the year they were set
Year setStanding records
198532
198622
198746
198853
198937
199055
199158
199235
199347
199438
199541
199638
199723
199819
199938
200018
200137
200237
200351
200425
200519
200634
200731
200839
200934
201030
201123
201229
201337
201436
201550
201636
201736
201819
201919
202035
202134
202238
202319
202434
202544
202638

Period of Record Coverage

1985 to 2026
Days with data per year at Trail Gulch Idaho 42 years of record at Trail Gulch Idaho, 1985 to 2026. 8 years have data for under 90 percent of days and are left out of rankings: 1985, 1986, 1987, 1989, 1994, 2005, 2022, 2026. 1985: 170 of 365 days1986: 155 of 365 days1987: 307 of 365 days1988: 360 of 366 days1989: 308 of 365 days1990: 360 of 365 days1991: 335 of 365 days1992: 365 of 366 days1993: 349 of 365 days1994: 310 of 365 days1995: 361 of 365 days1996: 363 of 366 days1997: 344 of 365 days1998: 362 of 365 days1999: 362 of 365 days2000: 364 of 366 days2001: 365 of 365 days2002: 364 of 365 days2003: 354 of 365 days2004: 345 of 366 days2005: 284 of 365 days2006: 364 of 365 days2007: 357 of 365 days2008: 364 of 366 days2009: 365 of 365 days2010: 363 of 365 days2011: 364 of 365 days2012: 365 of 366 days2013: 363 of 365 days2014: 361 of 365 days2015: 363 of 365 days2016: 360 of 366 days2017: 364 of 365 days2018: 365 of 365 days2019: 364 of 365 days2020: 364 of 366 days2021: 364 of 365 days2022: 304 of 365 days2023: 362 of 365 days2024: 366 of 366 days2025: 363 of 365 days2026: 284 of 365 days1990200020102020
42 years of record at Trail Gulch Idaho, 1985 to 2026. 8 years have data for under 90 percent of days and are left out of rankings: 1985, 1986, 1987, 1989, 1994, 2005, 2022, 2026.
Days with data per year at Trail Gulch Idaho
YearDays with dataShare of yearComplete
198517047%No
198615542%No
198730784%No
198836098%Yes
198930884%No
199036099%Yes
199133592%Yes
1992365100%Yes
199334996%Yes
199431085%No
199536199%Yes
199636399%Yes
199734494%Yes
199836299%Yes
199936299%Yes
200036499%Yes
2001365100%Yes
2002364100%Yes
200335497%Yes
200434594%Yes
200528478%No
2006364100%Yes
200735798%Yes
200836499%Yes
2009365100%Yes
201036399%Yes
2011364100%Yes
2012365100%Yes
201336399%Yes
201436199%Yes
201536399%Yes
201636098%Yes
2017364100%Yes
2018365100%Yes
2019364100%Yes
202036499%Yes
2021364100%Yes
202230483%No
202336299%Yes
2024366100%Yes
202536399%Yes
202628478%No

Latest Records

20
Latest records at Trail Gulch Idaho
DateStationRecordValueBeat old record byOld record stoodSignificance
9 October 2026Trail Gulch Idaho, USdaily high min (Provisional)17.2 C (63.0 F)0.5 C (0.9 F)1 year4 of 100 (Routine)
8 October 2026Trail Gulch Idaho, USdaily high min (Provisional)17.8 C (64.0 F)1.1 C (2.0 F)1 year6 of 100 (Routine)
7 October 2026Trail Gulch Idaho, USdaily high max (Provisional)27.8 C (82.0 F)2.2 C (4.0 F)5 years8 of 100 (Routine)
7 October 2026Trail Gulch Idaho, USdaily high min (Provisional)16.7 C (62.1 F)1.7 C (3.1 F)5 years8 of 100 (Routine)
6 October 2026Trail Gulch Idaho, USdaily high min (Provisional)16.1 C (61.0 F)2.2 C (4.0 F)23 years14 of 100 (Routine)
5 October 2026Trail Gulch Idaho, USdaily high max (Provisional)29.4 C (84.9 F)3.8 C (6.8 F)23 years16 of 100 (Routine)
5 October 2026Trail Gulch Idaho, USdaily high min (Provisional)19.4 C (66.9 F)3.8 C (6.8 F)4 years12 of 100 (Routine)
4 October 2026Trail Gulch Idaho, USdaily high max (Provisional)30.6 C (87.1 F)2.3 C (4.1 F)1 year7 of 100 (Routine)
4 October 2026Trail Gulch Idaho, USdaily high min (Provisional)17.8 C (64.0 F)0.6 C (1.1 F)4 years6 of 100 (Routine)
4 September 2026Trail Gulch Idaho, USdaily low min (Tie, Provisional)5.6 C (42.1 F)tie9 years1 of 100 (Routine)
27 August 2026Trail Gulch Idaho, USdaily high min (Provisional)23.3 C (73.9 F)0.5 C (0.9 F)16 years10 of 100 (Routine)
21 August 2026Trail Gulch Idaho, USdaily high max (Provisional)36.1 C (97.0 F)0.5 C (0.9 F)16 years10 of 100 (Routine)
21 August 2026Trail Gulch Idaho, USdaily high min (Tie, Provisional)23.3 C (73.9 F)tie20 years2 of 100 (Routine)
20 August 2026Trail Gulch Idaho, USdaily high max (Provisional)36.1 C (97.0 F)2.8 C (5.0 F)16 years15 of 100 (Routine)
20 August 2026Trail Gulch Idaho, USdaily high min (Provisional)22.8 C (73.0 F)1.7 C (3.1 F)0 years8 of 100 (Routine)
12 August 2026Trail Gulch Idaho, USdaily high min (Tie)22.8 C (73.0 F)tie1 year1 of 100 (Routine)
8 August 2026Trail Gulch Idaho, USdaily high min24.4 C (75.9 F)0.5 C (0.9 F)13 years9 of 100 (Routine)
7 August 2026Trail Gulch Idaho, USdaily high max36.1 C (97.0 F)1.0 C (1.8 F)36 years16 of 100 (Routine)
6 August 2026Trail Gulch Idaho, USdaily high max (Tie)36.1 C (97.0 F)tie24 years2 of 100 (Routine)
1 August 2026Trail Gulch Idaho, USdaily high min24.4 C (75.9 F)1.1 C (2.0 F)5 years7 of 100 (Routine)

Climate Trend

31 complete years, 1988 to 2025
Annual mean temperature at Trail Gulch Idaho as warming stripes, 1988 to 2025 One stripe for each of 31 complete years at Trail Gulch Idaho, 1988 to 2025. Blue stripes are years cooler than the station's own mean of 9.8 C (49.7 F); red stripes are warmer. The coolest year was 1993, at 7.6 C (45.7 F), and the warmest was 2025, at 11.1 C (52.0 F). The strongest colour marks a difference of 2.3 C (4.1 F). 1988: 8.1 C, -1.7 C from the station mean1990: 9.2 C, -0.6 C from the station mean1992: 10.3 C, +0.5 C from the station mean1993: 7.6 C, -2.2 C from the station mean1995: 9.4 C, -0.5 C from the station mean1996: 9.4 C, -0.5 C from the station mean1998: 9.6 C, -0.3 C from the station mean1999: 10.0 C, +0.2 C from the station mean2000: 10.2 C, +0.4 C from the station mean2001: 10.4 C, +0.6 C from the station mean2002: 9.7 C, -0.1 C from the station mean2003: 10.8 C, +1.0 C from the station mean2006: 9.8 C, 0.0 C from the station mean2007: 10.5 C, +0.7 C from the station mean2008: 9.2 C, -0.6 C from the station mean2009: 9.2 C, -0.6 C from the station mean2010: 9.2 C, -0.6 C from the station mean2011: 9.1 C, -0.7 C from the station mean2012: 10.7 C, +0.9 C from the station mean2013: 9.6 C, -0.2 C from the station mean2014: 10.2 C, +0.4 C from the station mean2015: 10.9 C, +1.1 C from the station mean2016: 10.5 C, +0.6 C from the station mean2017: 9.9 C, +0.1 C from the station mean2018: 9.9 C, +0.1 C from the station mean2019: 8.9 C, -0.9 C from the station mean2020: 10.1 C, +0.3 C from the station mean2021: 10.5 C, +0.7 C from the station mean2023: 9.7 C, -0.2 C from the station mean2024: 10.6 C, +0.8 C from the station mean2025: 11.1 C, +1.3 C from the station mean19881995200020052010201520202025
One stripe for each of 31 complete years at Trail Gulch Idaho, 1988 to 2025. Blue stripes are years cooler than the station's own mean of 9.8 C (49.7 F); red stripes are warmer. The coolest year was 1993, at 7.6 C (45.7 F), and the warmest was 2025, at 11.1 C (52.0 F). The strongest colour marks a difference of 2.3 C (4.1 F).
Annual mean temperature at Trail Gulch Idaho as warming stripes, 1988 to 2025
YearAnnual mean temperatureDifference from the station mean
19888.1 C-1.70 C
19909.2 C-0.63 C
199210.3 C+0.48 C
19937.6 C-2.20 C
19959.4 C-0.45 C
19969.4 C-0.45 C
19989.6 C-0.25 C
199910.0 C+0.16 C
200010.2 C+0.43 C
200110.4 C+0.57 C
20029.7 C-0.11 C
200310.8 C+0.96 C
20069.8 C+0.03 C
200710.5 C+0.68 C
20089.2 C-0.57 C
20099.2 C-0.62 C
20109.2 C-0.59 C
20119.1 C-0.73 C
201210.7 C+0.88 C
20139.6 C-0.24 C
201410.2 C+0.37 C
201510.9 C+1.07 C
201610.5 C+0.65 C
20179.9 C+0.11 C
20189.9 C+0.11 C
20198.9 C-0.88 C
202010.1 C+0.31 C
202110.5 C+0.67 C
20239.7 C-0.16 C
202410.6 C+0.83 C
202511.1 C+1.31 C

The annual mean temperature here has risen by 0.4 C (0.1 to 0.6) per decade over 1988 to 2025. In Fahrenheit: 0.6 F (0.2 to 1.1) per decade. The slope is a straight line fitted to 31 complete years; the brackets give its 95 percent interval.

Fitted temperature trends per decade at Trail Gulch Idaho
MeasurePer decade (C)Per decade (F)PeriodComplete yearsReading
Annual mean temperature0.4 C (0.1 to 0.6) per decade0.6 F (0.2 to 1.1) per decade1988 to 202531Rise
Mean daily maximum0.32 C (0.05 to 0.60) per decade0.6 F (0.1 to 1.1) per decade1988 to 202531Rise
Mean daily minimum0.4 C (0.2 to 0.6) per decade0.7 F (0.3 to 1.1) per decade1988 to 202531Rise

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

1985 to 2026
Yearly extremes at Trail Gulch Idaho: the record and the median year
MeasureRecordYear of the recordMedian yearYears with a value
Hottest day (TXx)38.9 C (102.0 F)200235.6 C (96.1 F)42
Coldest night (TNn)-28.8 C (-19.8 F)1990-15.6 C (3.9 F)42

Hottest day (TXx)

Hottest day (TXx) at Trail Gulch Idaho by year The hottest day of the year at Trail Gulch Idaho, 1985 to 2026. The record is 38.9 C (102.0 F) in 2002, marked on the chart; the median year is 35.6 C (96.1 F). 3032.53537.5401990200020102020Record: 38.9 C (102.0 F) in 2002
The hottest day of the year at Trail Gulch Idaho, 1985 to 2026. The record is 38.9 C (102.0 F) in 2002, marked on the chart; the median year is 35.6 C (96.1 F).
Hottest day (TXx) at Trail Gulch Idaho by year
YearHottest day (TXx)
198533.6 C (92.5 F)
198631.6 C (88.9 F)
198730.8 C (87.4 F)
198832.3 C (90.1 F)
198935.1 C (95.2 F)
199035.5 C (95.9 F)
199131.9 C (89.4 F)
199235.1 C (95.2 F)
199330.0 C (86.0 F)
199433.6 C (92.5 F)
199533.2 C (91.8 F)
199634.3 C (93.7 F)
199734.4 C (93.9 F)
199838.3 C (100.9 F)
199935.0 C (95.0 F)
200036.7 C (98.1 F)
200137.2 C (99.0 F)
200238.9 C (102.0 F)
200338.3 C (100.9 F)
200433.9 C (93.0 F)
200535.6 C (96.1 F)
200637.2 C (99.0 F)
200737.8 C (100.0 F)
200835.6 C (96.1 F)
200935.6 C (96.1 F)
201035.6 C (96.1 F)
201135.6 C (96.1 F)
201236.1 C (97.0 F)
201336.7 C (98.1 F)
201435.0 C (95.0 F)
201535.6 C (96.1 F)
201634.4 C (93.9 F)
201735.0 C (95.0 F)
201836.1 C (97.0 F)
201935.0 C (95.0 F)
202036.7 C (98.1 F)
202136.7 C (98.1 F)
202237.2 C (99.0 F)
202336.7 C (98.1 F)
202436.7 C (98.1 F)
202535.6 C (96.1 F)
202636.7 C (98.1 F)

Coldest night (TNn)

Coldest night (TNn) at Trail Gulch Idaho by year The coldest night of the year at Trail Gulch Idaho, 1985 to 2026. The record is -28.8 C (-19.8 F) in 1990, marked on the chart; the median year is -15.6 C (3.9 F). -30-25-20-15-10-51990200020102020Record: -28.8 C (-19.8 F) in 1990
The coldest night of the year at Trail Gulch Idaho, 1985 to 2026. The record is -28.8 C (-19.8 F) in 1990, marked on the chart; the median year is -15.6 C (3.9 F).
Coldest night (TNn) at Trail Gulch Idaho by year
YearColdest night (TNn)
1985-19.8 C (-3.6 F)
1986-10.4 C (13.3 F)
1987-17.4 C (0.7 F)
1988-16.3 C (2.7 F)
1989-24.9 C (-12.8 F)
1990-28.8 C (-19.8 F)
1991-17.8 C (0.0 F)
1992-13.9 C (7.0 F)
1993-16.3 C (2.7 F)
1994-13.1 C (8.4 F)
1995-10.8 C (12.6 F)
1996-19.0 C (-2.2 F)
1997-18.6 C (-1.5 F)
1998-19.4 C (-2.9 F)
1999-11.1 C (12.0 F)
2000-8.9 C (16.0 F)
2001-15.0 C (5.0 F)
2002-12.2 C (10.0 F)
2003-14.4 C (6.1 F)
2004-15.0 C (5.0 F)
2005-15.0 C (5.0 F)
2006-15.6 C (3.9 F)
2007-17.2 C (1.0 F)
2008-15.6 C (3.9 F)
2009-16.1 C (3.0 F)
2010-16.7 C (1.9 F)
2011-13.9 C (7.0 F)
2012-11.1 C (12.0 F)
2013-17.8 C (0.0 F)
2014-17.2 C (1.0 F)
2015-18.3 C (-0.9 F)
2016-16.1 C (3.0 F)
2017-16.7 C (1.9 F)
2018-16.1 C (3.0 F)
2019-13.3 C (8.1 F)
2020-11.7 C (10.9 F)
2021-12.8 C (9.0 F)
2022-15.6 C (3.9 F)
2023-16.7 C (1.9 F)
2024-12.2 C (10.0 F)
2025-15.0 C (5.0 F)
2026-10.0 C (14.0 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

31 years with a frost

Across 31 years with a frost, the median last spring frost at Trail Gulch Idaho falls on 22 May and the median first autumn frost on 9 October, which leaves a median of 137 days between them.

Fitted over all years, the growing season changes by +11.2 days per decade at this station.

Frost dates and growing season at Trail Gulch Idaho
MeasureMedian, all yearsEarliest periodRecent period (1990 to 2025)Recent against earliestFitted trend
Last spring frost22 Mayn/a22 Mayn/a-6.3 days per decade
First autumn frost9 Octobern/a9 Octobern/a+4.9 days per decade
Growing days137 daysn/a139 daysn/a+11.2 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 Trail Gulch Idaho standing records by year: CSV or JSON. Field meanings are on the data page.
  • Data for Trail Gulch Idaho 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 2026-10-14 (14 October 2026). Records are computed by this site and are not official.

Data as of . Last revised (2026-10-14).