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Rosette Weather Records (USC00427408)

Record envelope, standing records and threshold days for Rosette (USC00427408), Utah, United States, with 37 years of record.

Key Facts for Rosette

  • Rosette (USC00427408) is a weather station in Utah, United States at 41.82 latitude and -113.41 longitude, 1,736 m (5,695 ft) above sea level.
  • The station reports from 1990 to 2026, 37 years of record.
  • 1,464 records set at Rosette still stand.
  • Records are tracked for tmax, tmin, prcp, snow, snwd: an element needs 30 years of data to be eligible.
  • Rosette set a daily record high minimum temperature of 16.7 C (62.1 F) on 10 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, 41.82 latitude, -113.41 longitude.
  • Elevation: 1,736 m (5,695 ft).
  • Period of record: 1990 to 2026, 37 years.
  • Eligible elements: tmax, tmin, prcp, snow, snwd.

Daily Record Envelope and 2026

26 days at or beyond a record
Daily record high and record low at Rosette, with 2026 drawn through them The band shows the record high and record low for each calendar day at Rosette. The lines show the 2026 daily maximum and minimum. 26 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 Rosette. The lines show the 2026 daily maximum and minimum. 26 days in 2026 matched or passed a record. Temperatures are in degrees Celsius.
Daily record high and record low at Rosette, with 2026 drawn through them
MonthHighest record highLowest record low2026 highest maximum2026 lowest minimum
Jan12.8 C (55.0 F)-25.0 C (-13.0 F)9.4 C (48.9 F)-10.6 C (12.9 F)
Feb16.7 C (62.1 F)-22.8 C (-9.0 F)12.8 C (55.0 F)-10.0 C (14.0 F)
Mar25.0 C (77.0 F)-15.6 C (3.9 F)25.0 C (77.0 F)-6.7 C (19.9 F)
Apr28.3 C (82.9 F)-15.0 C (5.0 F)22.2 C (72.0 F)-6.1 C (21.0 F)
May32.2 C (90.0 F)-10.0 C (14.0 F)30.6 C (87.1 F)2.2 C (36.0 F)
Jun37.8 C (100.0 F)-2.8 C (27.0 F)32.8 C (91.0 F)3.9 C (39.0 F)
Jul38.9 C (102.0 F)3.9 C (39.0 F)37.2 C (99.0 F)13.9 C (57.0 F)
Aug37.8 C (100.0 F)-0.6 C (30.9 F)37.2 C (99.0 F)12.8 C (55.0 F)
Sep36.1 C (97.0 F)-6.7 C (19.9 F)28.3 C (82.9 F)6.1 C (43.0 F)
Oct33.3 C (91.9 F)-16.7 C (1.9 F)28.3 C (82.9 F)5.0 C (41.0 F)
Nov20.6 C (69.1 F)-22.8 C (-9.0 F)n/an/a
Dec17.2 C (63.0 F)-31.1 C (-24.0 F)n/an/a

Which Years Hold Standing Records

1,464 standing records
Standing records at Rosette by the year they were set 1,464 records at Rosette still stand. 2013 holds the most, with 65. 0204060801990: 281991: 221992: 431993: 521994: 541995: 501996: 561997: 271998: 181999: 352000: 362001: 522002: 332003: 512004: 322005: 162006: 422007: 272008: 512009: 532010: 402011: 242012: 342013: 652014: 352015: 492016: 272017: 372018: 212019: 332020: 362021: 392022: 542023: 332024: 412025: 632026: 551990199419982002200620102014201820222026
1,464 records at Rosette still stand. 2013 holds the most, with 65.
Standing records at Rosette by the year they were set
Year setStanding records
199028
199122
199243
199352
199454
199550
199656
199727
199818
199935
200036
200152
200233
200351
200432
200516
200642
200727
200851
200953
201040
201124
201234
201365
201435
201549
201627
201737
201821
201933
202036
202139
202254
202333
202441
202563
202655

All-Time Record Progression

1 new records
When Rosette set new all-time records 1 all-time records were set at Rosette between 3 August 2023 and 3 August 2023. Each dot is a new record. Record daily precipitation3 August 2023: Record daily precipitation 73.7 mm (2.9 in)
1 all-time records were set at Rosette between 3 August 2023 and 3 August 2023. Each dot is a new record.
When Rosette set new all-time records
DateKindDetail
2023-08-03Record daily precipitationRecord daily precipitation 73.7 mm (2.9 in)

Wettest Day of Each Month

Aug: 73.7 mm (2.9 in)
Record daily precipitation for each month at Rosette The wettest day on record for each calendar month at Rosette. The most was 73.7 mm (2.9 in) on 3 August 2023. 020406080 Jan: 19.6 mm (0.8 in), 3 January 1997 Jan Feb: 18.3 mm (0.7 in), 13 February 1992 Feb Mar: 19.6 mm (0.8 in), 21 March 2020 Mar Apr: 35.6 mm (1.4 in), 30 April 1999 Apr May: 28.2 mm (1.1 in), 11 May 1998 May Jun: 31.8 mm (1.3 in), 4 June 1995 Jun Jul: 25.9 mm (1.0 in), 30 July 1998 Jul Aug: 73.7 mm (2.9 in), 3 August 2023 Aug Sep: 34.3 mm (1.4 in), 16 September 2015 Sep Oct: 38.1 mm (1.5 in), 17 October 2016 Oct Nov: 23.6 mm (0.9 in), 9 November 2022 Nov Dec: 32.5 mm (1.3 in), 9 December 2004 Dec
The wettest day on record for each calendar month at Rosette. The most was 73.7 mm (2.9 in) on 3 August 2023.
Record daily precipitation for each month at Rosette
MonthRecord daily precipitation (mm)Date
Jan19.6 mm (0.8 in)3 January 1997
Feb18.3 mm (0.7 in)13 February 1992
Mar19.6 mm (0.8 in)21 March 2020
Apr35.6 mm (1.4 in)30 April 1999
May28.2 mm (1.1 in)11 May 1998
Jun31.8 mm (1.3 in)4 June 1995
Jul25.9 mm (1.0 in)30 July 1998
Aug73.7 mm (2.9 in)3 August 2023
Sep34.3 mm (1.4 in)16 September 2015
Oct38.1 mm (1.5 in)17 October 2016
Nov23.6 mm (0.9 in)9 November 2022
Dec32.5 mm (1.3 in)9 December 2004

Period of Record Coverage

1990 to 2026
Days with data per year at Rosette 37 years of record at Rosette, 1990 to 2026. 5 years have data for under 90 percent of days and are left out of rankings: 1990, 1991, 2006, 2011, 2026. 1990: 184 of 365 days1991: 261 of 365 days1992: 339 of 366 days1993: 356 of 365 days1994: 349 of 365 days1995: 356 of 365 days1996: 350 of 366 days1997: 349 of 365 days1998: 353 of 365 days1999: 353 of 365 days2000: 347 of 366 days2001: 356 of 365 days2002: 330 of 365 days2003: 361 of 365 days2004: 355 of 366 days2005: 361 of 365 days2006: 324 of 365 days2007: 363 of 365 days2008: 347 of 366 days2009: 346 of 365 days2010: 336 of 365 days2011: 274 of 365 days2012: 330 of 366 days2013: 343 of 365 days2014: 329 of 365 days2015: 365 of 365 days2016: 366 of 366 days2017: 364 of 365 days2018: 365 of 365 days2019: 359 of 365 days2020: 363 of 366 days2021: 363 of 365 days2022: 365 of 365 days2023: 365 of 365 days2024: 364 of 366 days2025: 365 of 365 days2026: 285 of 365 days19901995200020052010201520202025
37 years of record at Rosette, 1990 to 2026. 5 years have data for under 90 percent of days and are left out of rankings: 1990, 1991, 2006, 2011, 2026.
Days with data per year at Rosette
YearDays with dataShare of yearComplete
199018450%No
199126172%No
199233993%Yes
199335698%Yes
199434996%Yes
199535698%Yes
199635096%Yes
199734996%Yes
199835397%Yes
199935397%Yes
200034795%Yes
200135698%Yes
200233090%Yes
200336199%Yes
200435597%Yes
200536199%Yes
200632489%No
200736399%Yes
200834795%Yes
200934695%Yes
201033692%Yes
201127475%No
201233090%Yes
201334394%Yes
201432990%Yes
2015365100%Yes
2016366100%Yes
2017364100%Yes
2018365100%Yes
201935998%Yes
202036399%Yes
202136399%Yes
2022365100%Yes
2023365100%Yes
202436499%Yes
2025365100%Yes
202628578%No

Latest Records

20
Latest records at Rosette
DateStationRecordValueBeat old record byOld record stoodSignificance
10 October 2026Rosette, USdaily high min (Provisional)16.7 C (62.1 F)4.5 C (8.1 F)1 year12 of 100 (Routine)
9 October 2026Rosette, USdaily high max (Provisional)27.2 C (81.0 F)0.5 C (0.9 F)23 years9 of 100 (Routine)
9 October 2026Rosette, USdaily high min (Provisional)14.4 C (57.9 F)1.6 C (2.9 F)1 year6 of 100 (Routine)
8 October 2026Rosette, USdaily high max (Provisional)27.8 C (82.0 F)1.7 C (3.1 F)29 years13 of 100 (Routine)
8 October 2026Rosette, USdaily high min (Provisional)15.6 C (60.1 F)1.2 C (2.2 F)1 year5 of 100 (Routine)
7 October 2026Rosette, USmonthly high min (Provisional)17.2 C (63.0 F)1.6 C (2.9 F)0 years16 of 100 (Routine)
6 October 2026Rosette, USdaily high min (Provisional)14.4 C (57.9 F)0.5 C (0.9 F)4 years5 of 100 (Routine)
5 October 2026Rosette, USdaily high min (Provisional)15.0 C (59.0 F)3.3 C (5.9 F)4 years10 of 100 (Routine)
4 October 2026Rosette, USmonthly high min (Provisional)15.6 C (60.1 F)0.6 C (1.1 F)18 years19 of 100 (Routine)
3 October 2026Rosette, USdaily high min (Provisional)12.2 C (54.0 F)0.5 C (0.9 F)0 years4 of 100 (Routine)
13 September 2026Rosette, USdaily high min (Tie, Provisional)14.4 C (57.9 F)tie11 years1 of 100 (Routine)
11 September 2026Rosette, USdaily high min (Provisional)17.2 C (63.0 F)0.5 C (0.9 F)1 year4 of 100 (Routine)
28 August 2026Rosette, USdaily high min (Provisional)20.0 C (68.0 F)0.6 C (1.1 F)24 years11 of 100 (Routine)
27 August 2026Rosette, USdaily high min (Tie, Provisional)20.0 C (68.0 F)tie24 years2 of 100 (Routine)
26 August 2026Rosette, USdaily high min (Provisional)18.9 C (66.0 F)1.1 C (2.0 F)3 years6 of 100 (Routine)
22 August 2026Rosette, USdaily high max (Provisional)34.4 C (93.9 F)0.5 C (0.9 F)16 years9 of 100 (Routine)
21 August 2026Rosette, USdaily high max (Provisional)35.6 C (96.1 F)2.3 C (4.1 F)33 years19 of 100 (Routine)
20 August 2026Rosette, USdaily high min (Provisional)22.2 C (72.0 F)2.2 C (4.0 F)33 years19 of 100 (Routine)
19 August 2026Rosette, USdaily high min (Provisional)20.6 C (69.1 F)0.6 C (1.1 F)5 years5 of 100 (Routine)
15 August 2026Rosette, USdaily rain13.2 mm (0.5 in)7.1 mm (0.28 in)33 years20 of 100 (Routine)

Climate Trend

29 complete years, 1992 to 2025
Annual mean temperature at Rosette as warming stripes, 1992 to 2025 One stripe for each of 29 complete years at Rosette, 1992 to 2025. Blue stripes are years cooler than the station's own mean of 8.6 C (47.5 F); red stripes are warmer. The coolest year was 1993, at 6.5 C (43.6 F), and the warmest was 2025, at 10.6 C (51.0 F). The strongest colour marks a difference of 2.2 C (4.0 F). 1992: 9.1 C, +0.4 C from the station mean1993: 6.5 C, -2.2 C from the station mean1994: 9.1 C, +0.5 C from the station mean1995: 8.3 C, -0.4 C from the station mean1996: 8.2 C, -0.4 C from the station mean1997: 7.8 C, -0.8 C from the station mean1998: 7.9 C, -0.8 C from the station mean1999: 8.3 C, -0.3 C from the station mean2000: 9.0 C, +0.4 C from the station mean2001: 9.1 C, +0.5 C from the station mean2003: 9.6 C, +1.0 C from the station mean2005: 8.1 C, -0.6 C from the station mean2007: 9.1 C, +0.5 C from the station mean2008: 7.8 C, -0.9 C from the station mean2009: 7.4 C, -1.2 C from the station mean2010: 7.4 C, -1.2 C from the station mean2012: 9.2 C, +0.6 C from the station mean2013: 8.0 C, -0.6 C from the station mean2015: 9.8 C, +1.2 C from the station mean2016: 8.9 C, +0.3 C from the station mean2017: 8.6 C, 0.0 C from the station mean2018: 9.1 C, +0.5 C from the station mean2019: 7.3 C, -1.3 C from the station mean2020: 8.7 C, +0.1 C from the station mean2021: 9.5 C, +0.9 C from the station mean2022: 8.9 C, +0.3 C from the station mean2023: 8.6 C, -0.1 C from the station mean2024: 10.3 C, +1.7 C from the station mean2025: 10.6 C, +1.9 C from the station mean19921995200020052010201520202025
One stripe for each of 29 complete years at Rosette, 1992 to 2025. Blue stripes are years cooler than the station's own mean of 8.6 C (47.5 F); red stripes are warmer. The coolest year was 1993, at 6.5 C (43.6 F), and the warmest was 2025, at 10.6 C (51.0 F). The strongest colour marks a difference of 2.2 C (4.0 F).
Annual mean temperature at Rosette as warming stripes, 1992 to 2025
YearAnnual mean temperatureDifference from the station mean
19929.1 C+0.43 C
19936.5 C-2.17 C
19949.1 C+0.46 C
19958.3 C-0.37 C
19968.2 C-0.45 C
19977.8 C-0.83 C
19987.9 C-0.76 C
19998.3 C-0.32 C
20009.0 C+0.35 C
20019.1 C+0.50 C
20039.6 C+0.98 C
20058.1 C-0.56 C
20079.1 C+0.45 C
20087.8 C-0.87 C
20097.4 C-1.18 C
20107.4 C-1.18 C
20129.2 C+0.60 C
20138.0 C-0.63 C
20159.8 C+1.15 C
20168.9 C+0.30 C
20178.6 C-0.01 C
20189.1 C+0.50 C
20197.3 C-1.31 C
20208.7 C+0.09 C
20219.5 C+0.92 C
20228.9 C+0.27 C
20238.6 C-0.06 C
202410.3 C+1.71 C
202510.6 C+1.93 C

This station does not have enough complete years (30 are needed) to fit a temperature trend.

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

1990 to 2026
Yearly extremes at Rosette: the record and the median year
MeasureRecordYear of the recordMedian yearYears with a value
Hottest day (TXx)38.9 C (102.0 F)200136.1 C (97.0 F)37
Coldest night (TNn)-31.1 C (-24.0 F)1990-20.0 C (-4.0 F)37
Wettest day (Rx1day)73.7 mm (2.9 in)202320.3 mm (0.8 in)37
Wettest five days (Rx5day)86.6 mm (3.4 in)202335.3 mm (1.4 in)37
Longest dry spell (CDD)65 days201636 days37

Hottest day (TXx)

Hottest day (TXx) at Rosette by year The hottest day of the year at Rosette, 1990 to 2026. The record is 38.9 C (102.0 F) in 2001, marked on the chart; the median year is 36.1 C (97.0 F). 3032343638401990200020102020Record: 38.9 C (102.0 F) in 2001
The hottest day of the year at Rosette, 1990 to 2026. The record is 38.9 C (102.0 F) in 2001, marked on the chart; the median year is 36.1 C (97.0 F).
Hottest day (TXx) at Rosette by year
YearHottest day (TXx)
199035.6 C (96.1 F)
199133.9 C (93.0 F)
199236.7 C (98.1 F)
199331.7 C (89.1 F)
199436.1 C (97.0 F)
199533.9 C (93.0 F)
199635.0 C (95.0 F)
199732.8 C (91.0 F)
199836.7 C (98.1 F)
199933.9 C (93.0 F)
200037.8 C (100.0 F)
200138.9 C (102.0 F)
200238.9 C (102.0 F)
200336.7 C (98.1 F)
200433.3 C (91.9 F)
200536.1 C (97.0 F)
200636.1 C (97.0 F)
200736.7 C (98.1 F)
200835.6 C (96.1 F)
200933.9 C (93.0 F)
201034.4 C (93.9 F)
201133.3 C (91.9 F)
201236.1 C (97.0 F)
201336.7 C (98.1 F)
201436.1 C (97.0 F)
201537.2 C (99.0 F)
201635.0 C (95.0 F)
201734.4 C (93.9 F)
201836.1 C (97.0 F)
201933.9 C (93.0 F)
202036.7 C (98.1 F)
202137.8 C (100.0 F)
202236.1 C (97.0 F)
202336.7 C (98.1 F)
202436.7 C (98.1 F)
202534.4 C (93.9 F)
202637.2 C (99.0 F)

Coldest night (TNn)

Coldest night (TNn) at Rosette by year The coldest night of the year at Rosette, 1990 to 2026. The record is -31.1 C (-24.0 F) in 1990, marked on the chart; the median year is -20.0 C (-4.0 F). -40-30-20-101990200020102020Record: -31.1 C (-24.0 F) in 1990
The coldest night of the year at Rosette, 1990 to 2026. The record is -31.1 C (-24.0 F) in 1990, marked on the chart; the median year is -20.0 C (-4.0 F).
Coldest night (TNn) at Rosette by year
YearColdest night (TNn)
1990-31.1 C (-24.0 F)
1991-20.6 C (-5.1 F)
1992-20.0 C (-4.0 F)
1993-23.3 C (-9.9 F)
1994-16.7 C (1.9 F)
1995-18.9 C (-2.0 F)
1996-22.8 C (-9.0 F)
1997-17.8 C (0.0 F)
1998-23.3 C (-9.9 F)
1999-16.7 C (1.9 F)
2000-18.9 C (-2.0 F)
2001-20.6 C (-5.1 F)
2002-21.1 C (-6.0 F)
2003-17.2 C (1.0 F)
2004-18.9 C (-2.0 F)
2005-19.4 C (-2.9 F)
2006-22.2 C (-8.0 F)
2007-20.0 C (-4.0 F)
2008-20.6 C (-5.1 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)
2013-23.3 C (-9.9 F)
2014-21.1 C (-6.0 F)
2015-18.9 C (-2.0 F)
2016-20.6 C (-5.1 F)
2017-25.0 C (-13.0 F)
2018-17.8 C (0.0 F)
2019-17.2 C (1.0 F)
2020-15.0 C (5.0 F)
2021-16.1 C (3.0 F)
2022-22.2 C (-8.0 F)
2023-22.8 C (-9.0 F)
2024-16.1 C (3.0 F)
2025-17.2 C (1.0 F)
2026-10.6 C (12.9 F)

Wettest day (Rx1day)

Wettest day (Rx1day) at Rosette by year The wettest day of the year at Rosette, 1990 to 2026. The record is 73.7 mm (2.9 in) in 2023, marked on the chart; the median year is 20.3 mm (0.8 in). 0204060801990200020102020Record: 73.7 mm (2.9 in) in 2023
The wettest day of the year at Rosette, 1990 to 2026. The record is 73.7 mm (2.9 in) in 2023, marked on the chart; the median year is 20.3 mm (0.8 in).
Wettest day (Rx1day) at Rosette by year
YearWettest day (Rx1day)
199017.8 mm (0.7 in)
199119.1 mm (0.8 in)
199219.1 mm (0.8 in)
199320.6 mm (0.8 in)
199411.4 mm (0.4 in)
199531.8 mm (1.3 in)
199618.0 mm (0.7 in)
199719.6 mm (0.8 in)
199829.7 mm (1.2 in)
199935.6 mm (1.4 in)
200021.6 mm (0.9 in)
200114.5 mm (0.6 in)
200231.8 mm (1.3 in)
200317.5 mm (0.7 in)
200432.5 mm (1.3 in)
200517.5 mm (0.7 in)
200616.5 mm (0.6 in)
200717.8 mm (0.7 in)
200822.9 mm (0.9 in)
200920.3 mm (0.8 in)
201030.0 mm (1.2 in)
201115.7 mm (0.6 in)
201213.5 mm (0.5 in)
201323.4 mm (0.9 in)
201421.6 mm (0.9 in)
201534.3 mm (1.4 in)
201638.1 mm (1.5 in)
201719.3 mm (0.8 in)
201817.3 mm (0.7 in)
201931.8 mm (1.3 in)
202019.6 mm (0.8 in)
202124.4 mm (1.0 in)
202223.6 mm (0.9 in)
202373.7 mm (2.9 in)
202418.0 mm (0.7 in)
202535.8 mm (1.4 in)
202613.2 mm (0.5 in)

Wettest five days (Rx5day)

Wettest five days (Rx5day) at Rosette by year The wettest five days of the year at Rosette, 1990 to 2026. The record is 86.6 mm (3.4 in) in 2023, marked on the chart; the median year is 35.3 mm (1.4 in). 0204060801001990200020102020Record: 86.6 mm (3.4 in) in 2023
The wettest five days of the year at Rosette, 1990 to 2026. The record is 86.6 mm (3.4 in) in 2023, marked on the chart; the median year is 35.3 mm (1.4 in).
Wettest five days (Rx5day) at Rosette by year
YearWettest five days (Rx5day)
199020.9 mm (0.8 in)
199129.8 mm (1.2 in)
199235.3 mm (1.4 in)
199336.8 mm (1.4 in)
199423.2 mm (0.9 in)
199549.9 mm (2.0 in)
199631.3 mm (1.2 in)
199751.8 mm (2.0 in)
199855.4 mm (2.2 in)
199980.0 mm (3.1 in)
200031.8 mm (1.3 in)
200127.7 mm (1.1 in)
200236.6 mm (1.4 in)
200326.9 mm (1.1 in)
200443.4 mm (1.7 in)
200538.6 mm (1.5 in)
200643.0 mm (1.7 in)
200720.1 mm (0.8 in)
200825.4 mm (1.0 in)
200952.5 mm (2.1 in)
201050.0 mm (2.0 in)
201133.8 mm (1.3 in)
201233.9 mm (1.3 in)
201331.8 mm (1.3 in)
201439.9 mm (1.6 in)
201551.1 mm (2.0 in)
201657.6 mm (2.3 in)
201734.1 mm (1.3 in)
201819.8 mm (0.8 in)
201962.8 mm (2.5 in)
202020.7 mm (0.8 in)
202137.6 mm (1.5 in)
202233.0 mm (1.3 in)
202386.6 mm (3.4 in)
202433.1 mm (1.3 in)
202556.7 mm (2.2 in)
202622.1 mm (0.9 in)

Longest dry spell (CDD)

Longest dry spell (CDD) at Rosette by year The longest dry spell of the year at Rosette, 1990 to 2026. The record is 65 days in 2016, marked on the chart; the median year is 36 days. 0204060801990200020102020Record: 65 days in 2016
The longest dry spell of the year at Rosette, 1990 to 2026. The record is 65 days in 2016, marked on the chart; the median year is 36 days.
Longest dry spell (CDD) at Rosette by year
YearLongest dry spell (CDD)
199055 days
199129 days
199232 days
199336 days
199451 days
199536 days
199642 days
199733 days
199820 days
199944 days
200030 days
200152 days
200241 days
200339 days
200437 days
200526 days
200626 days
200746 days
200828 days
200934 days
201020 days
201117 days
201227 days
201337 days
201433 days
201530 days
201665 days
201734 days
201842 days
201955 days
202048 days
202135 days
202236 days
202332 days
202429 days
202542 days
202652 days

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

29 years with a frost

Across 29 years with a frost, the median last spring frost at Rosette falls on 23 May and the median first autumn frost on 30 September, which leaves a median of 126 days between them.

Fitted over all years, the growing season changes by +7.2 days per decade at this station.

Frost dates and growing season at Rosette
MeasureMedian, all yearsEarliest periodRecent period (1992 to 2025)Recent against earliestFitted trend
Last spring frost23 Mayn/a23 Mayn/a-1.0 days per decade
First autumn frost30 Septembern/a30 Septembern/a+6.3 days per decade
Growing days126 daysn/a126 daysn/a+7.2 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.

Rainfall Return Levels

32 years, 1992 to 2025

A day with at least 22.1 mm (0.9 in) of rain is expected about once in 2 years. A day with at least 69.6 mm (2.7 in) of rain is expected about once in 100 years.

Rainfall return levels at Rosette: the daily rain expected about once in a given number of years
Expected about once inA day with at leastNote
2 years22.1 mm (0.9 in)
5 years30.7 mm (1.2 in)
10 years37.8 mm (1.5 in)
25 years48.6 mm (1.9 in)
50 years58.3 mm (2.3 in)Longer than the 32 years of record
100 years69.6 mm (2.7 in)Longer than the 32 years of record

The levels come from a generalised extreme value (GEV) distribution fitted by L-moments to the wettest-day total of each year, 32 years of values from 1992 to 2025.

A return level is an estimate. It is least reliable for the long periods, 50 and 100 years, and for any period longer than the record behind the fit, where the fit has to reach past the largest day actually observed. It is not a forecast.

The largest wettest-day totals in the fit: 73.7 mm (2.9 in) in 2023; 38.1 mm (1.5 in) in 2016; 35.8 mm (1.4 in) in 2025.

Download the Data

  • Data for Rosette standing records by year: CSV or JSON. Field meanings are on the data page.
  • Data for Rosette 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).