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Assay - Hatch 10SW Weather Records (USR0000ASSA)

Record envelope, standing records and threshold days for Assay - Hatch 10SW (USR0000ASSA), Utah, United States, with 41 years of record.

Key Facts for Assay - Hatch 10SW

  • Assay - Hatch 10SW (USR0000ASSA) is a weather station in Utah, United States at 37.52 latitude and -112.56 longitude, 2,469 m (8,100 ft) above sea level.
  • The station reports from 1983 to 2023, 41 years of record.
  • 1,464 records set at Assay - Hatch 10SW still stand.
  • Records are tracked for tmax, tmin: an element needs 30 years of data to be eligible.
  • Assay - Hatch 10SW set a daily record high minimum temperature of 12.2 C (54.0 F) on 13 September 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, 37.52 latitude, -112.56 longitude.
  • Elevation: 2,469 m (8,100 ft).
  • Period of record: 1983 to 2023, 41 years.
  • Eligible elements: tmax, tmin.

Daily Record Envelope and 2026

33 days at or beyond a record
Daily record high and record low at Assay - Hatch 10SW, with 2026 drawn through them The band shows the record high and record low for each calendar day at Assay - Hatch 10SW. The lines show the 2026 daily maximum and minimum. 33 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 Assay - Hatch 10SW. The lines show the 2026 daily maximum and minimum. 33 days in 2026 matched or passed a record. Temperatures are in degrees Celsius.
Daily record high and record low at Assay - Hatch 10SW, with 2026 drawn through them
MonthHighest record highLowest record low2026 highest maximum2026 lowest minimum
Jan20.6 C (69.1 F)-26.1 C (-15.0 F)13.3 C (55.9 F)-15.6 C (3.9 F)
Feb17.2 C (63.0 F)-21.7 C (-7.1 F)17.2 C (63.0 F)-16.7 C (1.9 F)
Mar26.1 C (79.0 F)-17.8 C (0.0 F)26.1 C (79.0 F)-7.2 C (19.0 F)
Apr33.9 C (93.0 F)-15.3 C (4.5 F)20.0 C (68.0 F)-8.3 C (17.1 F)
May32.7 C (90.9 F)-9.4 C (15.1 F)26.1 C (79.0 F)-3.9 C (25.0 F)
Jun35.0 C (95.0 F)-3.7 C (25.3 F)29.4 C (84.9 F)-1.1 C (30.0 F)
Jul35.0 C (95.0 F)1.3 C (34.3 F)32.8 C (91.0 F)3.9 C (39.0 F)
Aug33.9 C (93.0 F)1.7 C (35.1 F)32.2 C (90.0 F)7.2 C (45.0 F)
Sep32.8 C (91.0 F)-8.8 C (16.2 F)28.3 C (82.9 F)3.3 C (37.9 F)
Oct27.8 C (82.0 F)-17.8 C (0.0 F)25.0 C (77.0 F)5.6 C (42.1 F)
Nov22.2 C (72.0 F)-22.8 C (-9.0 F)n/an/a
Dec21.8 C (71.2 F)-23.9 C (-11.0 F)n/an/a

Which Years Hold Standing Records

1,464 standing records
Standing records at Assay - Hatch 10SW by the year they were set 1,464 records at Assay - Hatch 10SW still stand. 1999 holds the most, with 134. 0501001501983: 201984: 411985: 371986: 211987: 401988: 341989: 511990: 381991: 321992: 1181993: 141994: 271995: 311996: 371997: 161998: 311999: 1342000: 292001: 242002: 492003: 312004: 292005: 242006: 232007: 232008: 312009: 272010: 302011: 302012: 172013: 392014: 162015: 302016: 242017: 272018: 132019: 322020: 422021: 342022: 292023: 262024: 172025: 192026: 27198319881993199820032008201320182023
1,464 records at Assay - Hatch 10SW still stand. 1999 holds the most, with 134.
Standing records at Assay - Hatch 10SW by the year they were set
Year setStanding records
198320
198441
198537
198621
198740
198834
198951
199038
199132
1992118
199314
199427
199531
199637
199716
199831
1999134
200029
200124
200249
200331
200429
200524
200623
200723
200831
200927
201030
201130
201217
201339
201416
201530
201624
201727
201813
201932
202042
202134
202229
202326
202417
202519
202627

Period of Record Coverage

1983 to 2026
Days with data per year at Assay - Hatch 10SW 44 years of record at Assay - Hatch 10SW, 1983 to 2026. 7 years have data for under 90 percent of days and are left out of rankings: 1983, 1986, 1992, 1993, 1998, 1999, 2026. 1983: 177 of 365 days1984: 346 of 366 days1985: 356 of 365 days1986: 260 of 365 days1987: 360 of 365 days1988: 363 of 366 days1989: 332 of 365 days1990: 357 of 365 days1991: 361 of 365 days1992: 310 of 366 days1993: 175 of 365 days1994: 358 of 365 days1995: 357 of 365 days1996: 352 of 366 days1997: 364 of 365 days1998: 280 of 365 days1999: 269 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: 365 of 365 days2007: 361 of 365 days2008: 366 of 366 days2009: 365 of 365 days2010: 365 of 365 days2011: 365 of 365 days2012: 365 of 366 days2013: 365 of 365 days2014: 364 of 365 days2015: 365 of 365 days2016: 363 of 366 days2017: 365 of 365 days2018: 365 of 365 days2019: 365 of 365 days2020: 366 of 366 days2021: 364 of 365 days2022: 365 of 365 days2023: 365 of 365 days2024: 364 of 366 days2025: 365 of 365 days2026: 284 of 365 days1990200020102020
44 years of record at Assay - Hatch 10SW, 1983 to 2026. 7 years have data for under 90 percent of days and are left out of rankings: 1983, 1986, 1992, 1993, 1998, 1999, 2026.
Days with data per year at Assay - Hatch 10SW
YearDays with dataShare of yearComplete
198317748%No
198434695%Yes
198535698%Yes
198626071%No
198736099%Yes
198836399%Yes
198933291%Yes
199035798%Yes
199136199%Yes
199231085%No
199317548%No
199435898%Yes
199535798%Yes
199635296%Yes
1997364100%Yes
199828077%No
199926974%No
2000365100%Yes
2001365100%Yes
2002365100%Yes
2003364100%Yes
2004365100%Yes
2005365100%Yes
2006365100%Yes
200736199%Yes
2008366100%Yes
2009365100%Yes
2010365100%Yes
2011365100%Yes
2012365100%Yes
2013365100%Yes
2014364100%Yes
2015365100%Yes
201636399%Yes
2017365100%Yes
2018365100%Yes
2019365100%Yes
2020366100%Yes
2021364100%Yes
2022365100%Yes
2023365100%Yes
202436499%Yes
2025365100%Yes
202628478%No

Latest Records

20
Latest records at Assay - Hatch 10SW
DateStationRecordValueBeat old record byOld record stoodSignificance
13 September 2026Assay - Hatch 10SW, USdaily high min (Provisional)12.2 C (54.0 F)0.6 C (1.1 F)36 years15 of 100 (Routine)
12 September 2026Assay - Hatch 10SW, USdaily high min (Provisional)13.9 C (57.0 F)0.8 C (1.4 F)36 years16 of 100 (Routine)
10 September 2026Assay - Hatch 10SW, USdaily high max (Provisional)28.3 C (82.9 F)0.5 C (0.9 F)11 years8 of 100 (Routine)
26 August 2026Assay - Hatch 10SW, USdaily high max (Tie, Provisional)29.4 C (84.9 F)tie24 years2 of 100 (Routine)
23 August 2026Assay - Hatch 10SW, USdaily high min (Tie, Provisional)13.9 C (57.0 F)tie0 years1 of 100 (Routine)
21 August 2026Assay - Hatch 10SW, USdaily high min (Tie, Provisional)15.6 C (60.1 F)tie0 years1 of 100 (Routine)
20 August 2026Assay - Hatch 10SW, USdaily high max (Tie, Provisional)31.7 C (89.1 F)tie16 years2 of 100 (Routine)
14 August 2026Assay - Hatch 10SW, USdaily low min (Tie)7.2 C (45.0 F)tie16 years2 of 100 (Routine)
8 August 2026Assay - Hatch 10SW, USdaily high min16.1 C (61.0 F)1.0 C (1.8 F)28 years16 of 100 (Routine)
7 August 2026Assay - Hatch 10SW, USdaily high max (Tie)30.6 C (87.1 F)tie8 years1 of 100 (Routine)
6 August 2026Assay - Hatch 10SW, USdaily high max (Tie)30.0 C (86.0 F)tie8 years1 of 100 (Routine)
5 August 2026Assay - Hatch 10SW, USdaily high max32.2 C (90.0 F)2.4 C (4.3 F)4 years12 of 100 (Routine)
4 August 2026Assay - Hatch 10SW, USdaily high max31.1 C (88.0 F)1.1 C (2.0 F)1 year7 of 100 (Routine)
3 August 2026Assay - Hatch 10SW, USdaily high min17.2 C (63.0 F)3.3 C (5.9 F)33 years29 of 100 (Routine)
3 August 2026Assay - Hatch 10SW, USdaily high max31.1 C (88.0 F)1.5 C (2.7 F)32 years17 of 100 (Routine)
1 August 2026Assay - Hatch 10SW, USdaily high max32.2 C (90.0 F)0.5 C (0.9 F)25 years12 of 100 (Routine)
25 July 2026Assay - Hatch 10SW, USdaily high max (Tie)30.6 C (87.1 F)tie9 years1 of 100 (Routine)
13 July 2026Assay - Hatch 10SW, USdaily high min (Tie)15.6 C (60.1 F)tie12 years1 of 100 (Routine)
1 July 2026Assay - Hatch 10SW, USdaily low min3.9 C (39.0 F)0.2 C (0.4 F)28 years12 of 100 (Routine)
29 June 2026Assay - Hatch 10SW, USdaily low min-1.1 C (30.0 F)3.9 C (7.0 F)5 years15 of 100 (Routine)

Climate Trend

34 complete years, 1985 to 2025
Annual mean temperature at Assay - Hatch 10SW as warming stripes, 1985 to 2025 One stripe for each of 34 complete years at Assay - Hatch 10SW, 1985 to 2025. Blue stripes are years cooler than the station's own mean of 7.3 C (45.2 F); red stripes are warmer. The coolest year was 1985, at 5.9 C (42.6 F), and the warmest was 2025, at 8.6 C (47.4 F). The strongest colour marks a difference of 1.5 C (2.7 F). 1985: 5.9 C, -1.4 C from the station mean1987: 6.0 C, -1.4 C from the station mean1988: 6.5 C, -0.9 C from the station mean1990: 6.9 C, -0.4 C from the station mean1991: 6.2 C, -1.1 C from the station mean1994: 6.7 C, -0.6 C from the station mean1995: 6.9 C, -0.4 C from the station mean1997: 6.8 C, -0.5 C from the station mean2000: 7.7 C, +0.3 C from the station mean2001: 7.4 C, +0.1 C from the station mean2002: 7.4 C, 0.0 C from the station mean2003: 8.0 C, +0.6 C from the station mean2004: 6.9 C, -0.5 C from the station mean2005: 7.5 C, +0.1 C from the station mean2006: 7.3 C, 0.0 C from the station mean2007: 8.0 C, +0.7 C from the station mean2008: 7.2 C, -0.2 C from the station mean2009: 7.3 C, -0.1 C from the station mean2010: 7.1 C, -0.2 C from the station mean2011: 6.9 C, -0.5 C from the station mean2012: 8.4 C, +1.1 C from the station mean2013: 7.0 C, -0.3 C from the station mean2014: 8.0 C, +0.6 C from the station mean2015: 7.8 C, +0.5 C from the station mean2016: 7.9 C, +0.6 C from the station mean2017: 8.5 C, +1.2 C from the station mean2018: 8.1 C, +0.7 C from the station mean2019: 6.4 C, -1.0 C from the station mean2020: 8.1 C, +0.8 C from the station mean2021: 8.1 C, +0.8 C from the station mean2022: 7.4 C, 0.0 C from the station mean2023: 6.5 C, -0.8 C from the station mean2024: 8.2 C, +0.9 C from the station mean2025: 8.6 C, +1.2 C from the station mean198519901995200020052010201520202025
One stripe for each of 34 complete years at Assay - Hatch 10SW, 1985 to 2025. Blue stripes are years cooler than the station's own mean of 7.3 C (45.2 F); red stripes are warmer. The coolest year was 1985, at 5.9 C (42.6 F), and the warmest was 2025, at 8.6 C (47.4 F). The strongest colour marks a difference of 1.5 C (2.7 F).
Annual mean temperature at Assay - Hatch 10SW as warming stripes, 1985 to 2025
YearAnnual mean temperatureDifference from the station mean
19855.9 C-1.42 C
19876.0 C-1.36 C
19886.5 C-0.85 C
19906.9 C-0.42 C
19916.2 C-1.09 C
19946.7 C-0.60 C
19956.9 C-0.44 C
19976.8 C-0.50 C
20007.7 C+0.35 C
20017.4 C+0.06 C
20027.4 C+0.02 C
20038.0 C+0.65 C
20046.9 C-0.47 C
20057.5 C+0.14 C
20067.3 C+0.01 C
20078.0 C+0.67 C
20087.2 C-0.15 C
20097.3 C-0.07 C
20107.1 C-0.24 C
20116.9 C-0.48 C
20128.4 C+1.10 C
20137.0 C-0.31 C
20148.0 C+0.63 C
20157.8 C+0.47 C
20167.9 C+0.61 C
20178.5 C+1.16 C
20188.1 C+0.73 C
20196.4 C-0.95 C
20208.1 C+0.78 C
20218.1 C+0.79 C
20227.4 C+0.03 C
20236.5 C-0.84 C
20248.2 C+0.88 C
20258.6 C+1.24 C

The annual mean temperature here has risen by 0.4 C (0.2 to 0.6) per decade over 1985 to 2025. In Fahrenheit: 0.7 F (0.4 to 1.0) per decade. The slope is a straight line fitted to 34 complete years; the brackets give its 95 percent interval.

Fitted temperature trends per decade at Assay - Hatch 10SW
MeasurePer decade (C)Per decade (F)PeriodComplete yearsReading
Annual mean temperature0.4 C (0.2 to 0.6) per decade0.7 F (0.4 to 1.0) per decade1985 to 202534Rise
Mean daily maximum0.8 C (0.5 to 1.0) per decade1.4 F (0.9 to 1.8) per decade1985 to 202534Rise
Mean daily minimum0.1 C (-0.1 to 0.2) per decade0.1 F (-0.2 to 0.4) per decade1985 to 202534Not clearly different from zero

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 Assay - Hatch 10SW: the record and the median year
MeasureRecordYear of the recordMedian yearYears with a value
Hottest day (TXx)35.0 C (95.0 F)200231.7 C (89.0 F)44
Coldest night (TNn)-26.1 C (-15.0 F)2013-18.9 C (-2.1 F)44

Hottest day (TXx)

Hottest day (TXx) at Assay - Hatch 10SW by year The hottest day of the year at Assay - Hatch 10SW, 1983 to 2026. The record is 35.0 C (95.0 F) in 2002, marked on the chart; the median year is 31.7 C (89.0 F). 2527.53032.5351990200020102020Record: 35.0 C (95.0 F) in 2002
The hottest day of the year at Assay - Hatch 10SW, 1983 to 2026. The record is 35.0 C (95.0 F) in 2002, marked on the chart; the median year is 31.7 C (89.0 F).
Hottest day (TXx) at Assay - Hatch 10SW by year
YearHottest day (TXx)
198328.4 C (83.1 F)
198429.2 C (84.6 F)
198531.2 C (88.2 F)
198626.5 C (79.7 F)
198727.7 C (81.9 F)
198828.1 C (82.6 F)
198932.3 C (90.1 F)
199029.2 C (84.6 F)
199129.2 C (84.6 F)
199233.9 C (93.0 F)
199328.5 C (83.3 F)
199431.9 C (89.4 F)
199529.6 C (85.3 F)
199631.6 C (88.9 F)
199730.4 C (86.7 F)
199832.8 C (91.0 F)
199930.6 C (87.1 F)
200032.8 C (91.0 F)
200131.1 C (88.0 F)
200235.0 C (95.0 F)
200333.9 C (93.0 F)
200431.1 C (88.0 F)
200533.3 C (91.9 F)
200632.2 C (90.0 F)
200733.3 C (91.9 F)
200830.6 C (87.1 F)
200932.8 C (91.0 F)
201031.1 C (88.0 F)
201131.1 C (88.0 F)
201231.1 C (88.0 F)
201335.0 C (95.0 F)
201431.1 C (88.0 F)
201531.7 C (89.1 F)
201632.2 C (90.0 F)
201732.2 C (90.0 F)
201831.7 C (89.1 F)
201930.6 C (87.1 F)
202033.9 C (93.0 F)
202134.9 C (94.8 F)
202231.6 C (88.9 F)
202333.9 C (93.0 F)
202433.3 C (91.9 F)
202532.8 C (91.0 F)
202632.8 C (91.0 F)

Coldest night (TNn)

Coldest night (TNn) at Assay - Hatch 10SW by year The coldest night of the year at Assay - Hatch 10SW, 1983 to 2026. The record is -26.1 C (-15.0 F) in 2013, marked on the chart; the median year is -18.9 C (-2.1 F). -30-25-20-15-101990200020102020Record: -26.1 C (-15.0 F) in 2013
The coldest night of the year at Assay - Hatch 10SW, 1983 to 2026. The record is -26.1 C (-15.0 F) in 2013, marked on the chart; the median year is -18.9 C (-2.1 F).
Coldest night (TNn) at Assay - Hatch 10SW by year
YearColdest night (TNn)
1983-15.1 C (4.8 F)
1984-17.9 C (-0.2 F)
1985-18.6 C (-1.5 F)
1986-17.8 C (0.0 F)
1987-18.2 C (-0.8 F)
1988-21.8 C (-7.2 F)
1989-21.4 C (-6.5 F)
1990-18.2 C (-0.8 F)
1991-17.4 C (0.7 F)
1992-18.6 C (-1.5 F)
1993-19.0 C (-2.2 F)
1994-19.8 C (-3.6 F)
1995-17.4 C (0.7 F)
1996-20.2 C (-4.4 F)
1997-17.2 C (1.0 F)
1998-17.2 C (1.0 F)
1999-12.8 C (9.0 F)
2000-19.4 C (-2.9 F)
2001-18.9 C (-2.0 F)
2002-20.0 C (-4.0 F)
2003-18.3 C (-0.9 F)
2004-20.0 C (-4.0 F)
2005-17.8 C (0.0 F)
2006-21.1 C (-6.0 F)
2007-25.0 C (-13.0 F)
2008-21.7 C (-7.1 F)
2009-22.2 C (-8.0 F)
2010-22.8 C (-9.0 F)
2011-22.8 C (-9.0 F)
2012-17.8 C (0.0 F)
2013-26.1 C (-15.0 F)
2014-16.1 C (3.0 F)
2015-20.0 C (-4.0 F)
2016-19.4 C (-2.9 F)
2017-21.7 C (-7.1 F)
2018-19.4 C (-2.9 F)
2019-21.7 C (-7.1 F)
2020-18.6 C (-1.5 F)
2021-17.7 C (0.1 F)
2022-20.7 C (-5.3 F)
2023-20.6 C (-5.1 F)
2024-17.2 C (1.0 F)
2025-18.9 C (-2.0 F)
2026-16.7 C (1.9 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

34 years with a frost

Across 34 years with a frost, the median last spring frost at Assay - Hatch 10SW falls on 3 June and the median first autumn frost on 30 September, which leaves a median of 119 days between them.

Fitted over all years, the growing season changes by +3.3 days per decade at this station.

Frost dates and growing season at Assay - Hatch 10SW
MeasureMedian, all yearsEarliest periodRecent period (1991 to 2025)Recent against earliestFitted trend
Last spring frost3 Junen/a5 Junen/a-1.8 days per decade
First autumn frost30 Septembern/a30 Septembern/a+1.5 days per decade
Growing days119 daysn/a119 daysn/a+3.3 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 Assay - Hatch 10SW standing records by year: CSV or JSON. Field meanings are on the data page.
  • Data for Assay - Hatch 10SW 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 2026-10-13 (13 October 2026). Records are computed by this site and are not official.

Data as of . Last revised (2026-10-13).