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Knowlton Montana Weather Records (USR0000MKNO)

Record envelope, standing records and threshold days for Knowlton Montana (USR0000MKNO), Montana, United States, with 39 years of record.

Key Facts for Knowlton Montana

  • Knowlton Montana (USR0000MKNO) is a weather station in Montana, United States at 46.31 latitude and -105.02 longitude, 1,012 m (3,320 ft) above sea level.
  • The station reports from 1985 to 2023, 39 years of record.
  • 1,464 records set at Knowlton Montana still stand.
  • Records are tracked for tmax, tmin: an element needs 30 years of data to be eligible.
  • Knowlton Montana tied a daily record high maximum temperature of 28.9 C (84.0 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: Montana, United States, 46.31 latitude, -105.02 longitude.
  • Elevation: 1,012 m (3,320 ft).
  • Period of record: 1985 to 2023, 39 years.
  • Eligible elements: tmax, tmin.

Daily Record Envelope and 2026

27 days at or beyond a record
Daily record high and record low at Knowlton Montana, with 2026 drawn through them The band shows the record high and record low for each calendar day at Knowlton Montana. The lines show the 2026 daily maximum and minimum. 27 days in 2026 matched or passed a record. Temperatures are in degrees Celsius. -40-200204060 JanFebMarAprMayJunJulAugSepOctNovDec
The band shows the record high and record low for each calendar day at Knowlton Montana. The lines show the 2026 daily maximum and minimum. 27 days in 2026 matched or passed a record. Temperatures are in degrees Celsius.
Daily record high and record low at Knowlton Montana, with 2026 drawn through them
MonthHighest record highLowest record low2026 highest maximum2026 lowest minimum
Jan16.7 C (62.1 F)-37.2 C (-35.0 F)12.8 C (55.0 F)-30.6 C (-23.1 F)
Feb20.0 C (68.0 F)-35.6 C (-32.1 F)17.8 C (64.0 F)-20.6 C (-5.1 F)
Mar26.1 C (79.0 F)-31.7 C (-25.1 F)25.0 C (77.0 F)-15.6 C (3.9 F)
Apr31.1 C (88.0 F)-16.1 C (3.0 F)29.4 C (84.9 F)-7.2 C (19.0 F)
May34.4 C (93.9 F)-4.4 C (24.1 F)32.8 C (91.0 F)-2.8 C (27.0 F)
Jun40.0 C (104.0 F)1.1 C (34.0 F)33.3 C (91.9 F)6.1 C (43.0 F)
Jul43.3 C (109.9 F)5.0 C (41.0 F)43.3 C (109.9 F)13.3 C (55.9 F)
Aug40.6 C (105.1 F)4.4 C (39.9 F)38.9 C (102.0 F)8.9 C (48.0 F)
Sep38.3 C (100.9 F)-7.2 C (19.0 F)37.2 C (99.0 F)7.2 C (45.0 F)
Oct35.0 C (95.0 F)-20.6 C (-5.1 F)28.9 C (84.0 F)5.0 C (41.0 F)
Nov22.8 C (73.0 F)-27.8 C (-18.0 F)n/an/a
Dec18.9 C (66.0 F)-35.0 C (-31.0 F)n/an/a

Which Years Hold Standing Records

1,464 standing records
Standing records at Knowlton Montana by the year they were set 1,464 records at Knowlton Montana still stand. 1985 holds the most, with 80. 0204060801985: 801986: 391987: 471988: 451989: 481990: 511991: 421992: 551993: 321994: 271995: 431996: 551997: 411998: 211999: 262000: 292001: 222002: 472003: 472004: 262005: 402006: 282007: 302008: 332009: 322010: 132011: 202012: 392013: 252014: 322015: 292016: 252017: 282018: 252019: 212020: 402021: 382022: 262023: 202024: 322025: 292026: 36198519901995200020052010201520202025
1,464 records at Knowlton Montana still stand. 1985 holds the most, with 80.
Standing records at Knowlton Montana by the year they were set
Year setStanding records
198580
198639
198747
198845
198948
199051
199142
199255
199332
199427
199543
199655
199741
199821
199926
200029
200122
200247
200347
200426
200540
200628
200730
200833
200932
201013
201120
201239
201325
201432
201529
201625
201728
201825
201921
202040
202138
202226
202320
202432
202529
202636

All-Time Record Progression

1 new records
When Knowlton Montana set new all-time records 1 all-time records were set at Knowlton Montana between 13 January 2024 and 13 January 2024. Each dot is a new record. Record low minimum temperature13 January 2024: Record low minimum temperature -37.2 C (-35.0 F)2025
1 all-time records were set at Knowlton Montana between 13 January 2024 and 13 January 2024. Each dot is a new record.
When Knowlton Montana set new all-time records
DateKindDetail
2024-01-13Record low minimum temperatureRecord low minimum temperature -37.2 C (-35.0 F)

Period of Record Coverage

1985 to 2026
Days with data per year at Knowlton Montana 42 years of record at Knowlton Montana, 1985 to 2026. 3 years have data for under 90 percent of days and are left out of rankings: 1985, 1989, 2026. 1985: 300 of 365 days1986: 340 of 365 days1987: 350 of 365 days1988: 360 of 366 days1989: 327 of 365 days1990: 357 of 365 days1991: 335 of 365 days1992: 345 of 366 days1993: 346 of 365 days1994: 354 of 365 days1995: 359 of 365 days1996: 364 of 366 days1997: 358 of 365 days1998: 365 of 365 days1999: 330 of 365 days2000: 363 of 366 days2001: 363 of 365 days2002: 363 of 365 days2003: 360 of 365 days2004: 360 of 366 days2005: 359 of 365 days2006: 359 of 365 days2007: 364 of 365 days2008: 364 of 366 days2009: 361 of 365 days2010: 365 of 365 days2011: 364 of 365 days2012: 362 of 366 days2013: 360 of 365 days2014: 360 of 365 days2015: 364 of 365 days2016: 363 of 366 days2017: 364 of 365 days2018: 360 of 365 days2019: 359 of 365 days2020: 365 of 366 days2021: 363 of 365 days2022: 360 of 365 days2023: 363 of 365 days2024: 364 of 366 days2025: 358 of 365 days2026: 283 of 365 days1990200020102020
42 years of record at Knowlton Montana, 1985 to 2026. 3 years have data for under 90 percent of days and are left out of rankings: 1985, 1989, 2026.
Days with data per year at Knowlton Montana
YearDays with dataShare of yearComplete
198530082%No
198634093%Yes
198735096%Yes
198836098%Yes
198932790%No
199035798%Yes
199133592%Yes
199234594%Yes
199334695%Yes
199435497%Yes
199535998%Yes
199636499%Yes
199735898%Yes
1998365100%Yes
199933090%Yes
200036399%Yes
200136399%Yes
200236399%Yes
200336099%Yes
200436098%Yes
200535998%Yes
200635998%Yes
2007364100%Yes
200836499%Yes
200936199%Yes
2010365100%Yes
2011364100%Yes
201236299%Yes
201336099%Yes
201436099%Yes
2015364100%Yes
201636399%Yes
2017364100%Yes
201836099%Yes
201935998%Yes
2020365100%Yes
202136399%Yes
202236099%Yes
202336399%Yes
202436499%Yes
202535898%Yes
202628378%No

Latest Records

20
Latest records at Knowlton Montana
DateStationRecordValueBeat old record byOld record stoodSignificance
9 October 2026Knowlton Montana, USdaily high max (Tie, Provisional)28.9 C (84.0 F)tie21 years2 of 100 (Routine)
28 August 2026Knowlton Montana, USdaily high min (Tie, Provisional)21.7 C (71.1 F)tie29 years3 of 100 (Routine)
4 August 2026Knowlton Montana, USdaily low min8.9 C (48.0 F)1.7 C (3.1 F)33 years18 of 100 (Routine)
1 August 2026Knowlton Montana, USdaily high max (Tie)38.9 C (102.0 F)tie17 years2 of 100 (Routine)
28 July 2026Knowlton Montana, USdaily high min22.8 C (73.0 F)0.6 C (1.1 F)37 years16 of 100 (Routine)
27 July 2026Knowlton Montana, USdaily high min (Tie)24.4 C (75.9 F)tie37 years3 of 100 (Routine)
26 July 2026Knowlton Montana, USdaily high min25.0 C (77.0 F)2.2 C (4.0 F)4 years11 of 100 (Routine)
26 July 2026Knowlton Montana, USdaily high max (Tie)37.8 C (100.0 F)tie4 years1 of 100 (Routine)
25 July 2026Knowlton Montana, USdaily high max40.6 C (105.1 F)1.2 C (2.2 F)1 year6 of 100 (Routine)
25 July 2026Knowlton Montana, USdaily high min26.1 C (79.0 F)0.5 C (0.9 F)1 year5 of 100 (Routine)
13 July 2026Knowlton Montana, USdaily high min24.4 C (75.9 F)2.2 C (4.0 F)24 years17 of 100 (Routine)
12 July 2026Knowlton Montana, USdaily high min24.4 C (75.9 F)2.2 C (4.0 F)1 year10 of 100 (Routine)
12 July 2026Knowlton Montana, USall-time high max (Tie)43.3 C (109.9 F)tie23 years7 of 100 (Routine)
11 July 2026Knowlton Montana, USdaily high min23.9 C (75.0 F)3.3 C (5.9 F)40 years25 of 100 (Routine)
11 July 2026Knowlton Montana, USdaily high max38.9 C (102.0 F)2.2 C (4.0 F)12 years11 of 100 (Routine)
10 July 2026Knowlton Montana, USdaily high max37.2 C (99.0 F)0.5 C (0.9 F)13 years8 of 100 (Routine)
28 May 2026Knowlton Montana, USmonthly high min (Tie)18.9 C (66.0 F)tie39 years6 of 100 (Routine)
27 May 2026Knowlton Montana, USmonthly high min (Tie)18.9 C (66.0 F)tie39 years6 of 100 (Routine)
26 May 2026Knowlton Montana, USdaily high min17.8 C (64.0 F)1.1 C (2.0 F)37 years17 of 100 (Routine)
26 May 2026Knowlton Montana, USdaily high max32.8 C (91.0 F)1.7 C (3.1 F)8 years8 of 100 (Routine)

Climate Trend

38 complete years, 1986 to 2025
Annual mean temperature at Knowlton Montana as warming stripes, 1986 to 2025 One stripe for each of 38 complete years at Knowlton Montana, 1986 to 2025. Blue stripes are years cooler than the station's own mean of 7.8 C (46.1 F); red stripes are warmer. The coolest year was 1996, at 5.3 C (41.5 F), and the warmest was 2012, at 9.8 C (49.6 F). The strongest colour marks a difference of 2.6 C (4.7 F). 1986: 7.3 C, -0.5 C from the station mean1987: 8.8 C, +1.0 C from the station mean1988: 8.6 C, +0.7 C from the station mean1989: 6.7 C, -1.2 C from the station mean1990: 8.5 C, +0.7 C from the station mean1992: 7.7 C, -0.2 C from the station mean1993: 5.7 C, -2.1 C from the station mean1994: 7.4 C, -0.4 C from the station mean1995: 7.3 C, -0.5 C from the station mean1996: 5.3 C, -2.6 C from the station mean1997: 7.6 C, -0.2 C from the station mean1998: 8.6 C, +0.8 C from the station mean2000: 7.7 C, -0.1 C from the station mean2001: 8.4 C, +0.6 C from the station mean2002: 7.4 C, -0.5 C from the station mean2003: 8.2 C, +0.3 C from the station mean2004: 8.0 C, +0.1 C from the station mean2005: 8.2 C, +0.4 C from the station mean2006: 9.1 C, +1.3 C from the station mean2007: 8.6 C, +0.8 C from the station mean2008: 7.0 C, -0.8 C from the station mean2009: 6.9 C, -0.9 C from the station mean2010: 7.3 C, -0.5 C from the station mean2011: 7.3 C, -0.5 C from the station mean2012: 9.8 C, +2.0 C from the station mean2013: 7.4 C, -0.5 C from the station mean2014: 7.0 C, -0.8 C from the station mean2015: 9.1 C, +1.3 C from the station mean2016: 9.1 C, +1.3 C from the station mean2017: 8.1 C, +0.3 C from the station mean2018: 6.7 C, -1.1 C from the station mean2019: 6.0 C, -1.8 C from the station mean2020: 8.4 C, +0.6 C from the station mean2021: 8.9 C, +1.1 C from the station mean2022: 7.2 C, -0.6 C from the station mean2023: 8.5 C, +0.7 C from the station mean2024: 9.1 C, +1.3 C from the station mean2025: 8.4 C, +0.6 C from the station mean198619901995200020052010201520202025
One stripe for each of 38 complete years at Knowlton Montana, 1986 to 2025. Blue stripes are years cooler than the station's own mean of 7.8 C (46.1 F); red stripes are warmer. The coolest year was 1996, at 5.3 C (41.5 F), and the warmest was 2012, at 9.8 C (49.6 F). The strongest colour marks a difference of 2.6 C (4.7 F).
Annual mean temperature at Knowlton Montana as warming stripes, 1986 to 2025
YearAnnual mean temperatureDifference from the station mean
19867.3 C-0.49 C
19878.8 C+1.01 C
19888.6 C+0.74 C
19896.7 C-1.16 C
19908.5 C+0.67 C
19927.7 C-0.16 C
19935.7 C-2.13 C
19947.4 C-0.41 C
19957.3 C-0.54 C
19965.3 C-2.55 C
19977.6 C-0.24 C
19988.6 C+0.82 C
20007.7 C-0.13 C
20018.4 C+0.62 C
20027.4 C-0.45 C
20038.2 C+0.34 C
20048.0 C+0.15 C
20058.2 C+0.40 C
20069.1 C+1.31 C
20078.6 C+0.82 C
20087.0 C-0.77 C
20096.9 C-0.94 C
20107.3 C-0.51 C
20117.3 C-0.51 C
20129.8 C+1.98 C
20137.4 C-0.45 C
20147.0 C-0.84 C
20159.1 C+1.27 C
20169.1 C+1.27 C
20178.1 C+0.28 C
20186.7 C-1.13 C
20196.0 C-1.80 C
20208.4 C+0.57 C
20218.9 C+1.11 C
20227.2 C-0.62 C
20238.5 C+0.72 C
20249.1 C+1.31 C
20258.4 C+0.58 C

The fitted trend in annual mean temperature here over 1986 to 2025 is 0.2 C (-0.1 to 0.5) per decade. The interval includes zero, so the trend is not clearly different from zero. In Fahrenheit: 0.3 F (-0.2 to 0.8) per decade. The slope is a straight line fitted to 38 complete years; the brackets give its 95 percent interval.

Fitted temperature trends per decade at Knowlton Montana
MeasurePer decade (C)Per decade (F)PeriodComplete yearsReading
Annual mean temperature0.2 C (-0.1 to 0.5) per decade0.3 F (-0.2 to 0.8) per decade1986 to 202538Not clearly different from zero
Mean daily maximum0.2 C (-0.1 to 0.6) per decade0.4 F (-0.2 to 1.0) per decade1986 to 202538Not clearly different from zero
Mean daily minimum0.1 C (-0.1 to 0.4) per decade0.2 F (-0.2 to 0.7) per decade1986 to 202538Not 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

1985 to 2026
Yearly extremes at Knowlton Montana: the record and the median year
MeasureRecordYear of the recordMedian yearYears with a value
Hottest day (TXx)43.3 C (109.9 F)200238.1 C (100.5 F)42
Coldest night (TNn)-37.2 C (-35.0 F)2024-28.3 C (-18.9 F)42

Hottest day (TXx)

Hottest day (TXx) at Knowlton Montana by year The hottest day of the year at Knowlton Montana, 1985 to 2026. The record is 43.3 C (109.9 F) in 2002, marked on the chart; the median year is 38.1 C (100.5 F). 303540451990200020102020Record: 43.3 C (109.9 F) in 2002
The hottest day of the year at Knowlton Montana, 1985 to 2026. The record is 43.3 C (109.9 F) in 2002, marked on the chart; the median year is 38.1 C (100.5 F).
Hottest day (TXx) at Knowlton Montana by year
YearHottest day (TXx)
198536.7 C (98.1 F)
198635.6 C (96.1 F)
198735.0 C (95.0 F)
198839.4 C (102.9 F)
198938.9 C (102.0 F)
199038.9 C (102.0 F)
199136.1 C (97.0 F)
199233.9 C (93.0 F)
199332.2 C (90.0 F)
199435.0 C (95.0 F)
199540.6 C (105.1 F)
199636.7 C (98.1 F)
199735.6 C (96.1 F)
199838.3 C (100.9 F)
199938.3 C (100.9 F)
200037.8 C (100.0 F)
200139.4 C (102.9 F)
200243.3 C (109.9 F)
200339.4 C (102.9 F)
200439.4 C (102.9 F)
200540.0 C (104.0 F)
200640.0 C (104.0 F)
200741.7 C (107.1 F)
200838.9 C (102.0 F)
200936.1 C (97.0 F)
201037.2 C (99.0 F)
201135.6 C (96.1 F)
201238.9 C (102.0 F)
201336.7 C (98.1 F)
201435.0 C (95.0 F)
201536.7 C (98.1 F)
201637.2 C (99.0 F)
201738.3 C (100.9 F)
201839.4 C (102.9 F)
201935.0 C (95.0 F)
202036.1 C (97.0 F)
202141.1 C (106.0 F)
202237.8 C (100.0 F)
202338.3 C (100.9 F)
202440.0 C (104.0 F)
202537.8 C (100.0 F)
202643.3 C (109.9 F)

Coldest night (TNn)

Coldest night (TNn) at Knowlton Montana by year The coldest night of the year at Knowlton Montana, 1985 to 2026. The record is -37.2 C (-35.0 F) in 2024, marked on the chart; the median year is -28.3 C (-18.9 F). -40-35-30-25-201990200020102020Record: -37.2 C (-35.0 F) in 2024
The coldest night of the year at Knowlton Montana, 1985 to 2026. The record is -37.2 C (-35.0 F) in 2024, marked on the chart; the median year is -28.3 C (-18.9 F).
Coldest night (TNn) at Knowlton Montana by year
YearColdest night (TNn)
1985-32.0 C (-25.6 F)
1986-24.4 C (-11.9 F)
1987-23.3 C (-9.9 F)
1988-29.4 C (-20.9 F)
1989-35.6 C (-32.1 F)
1990-34.4 C (-29.9 F)
1991-26.1 C (-15.0 F)
1992-32.2 C (-26.0 F)
1993-27.2 C (-17.0 F)
1994-28.9 C (-20.0 F)
1995-27.8 C (-18.0 F)
1996-34.4 C (-29.9 F)
1997-31.1 C (-24.0 F)
1998-28.3 C (-18.9 F)
1999-23.3 C (-9.9 F)
2000-25.6 C (-14.1 F)
2001-21.1 C (-6.0 F)
2002-24.4 C (-11.9 F)
2003-26.1 C (-15.0 F)
2004-29.4 C (-20.9 F)
2005-27.8 C (-18.0 F)
2006-30.0 C (-22.0 F)
2007-24.4 C (-11.9 F)
2008-32.8 C (-27.0 F)
2009-27.8 C (-18.0 F)
2010-27.2 C (-17.0 F)
2011-30.0 C (-22.0 F)
2012-24.4 C (-11.9 F)
2013-31.7 C (-25.1 F)
2014-28.3 C (-18.9 F)
2015-23.9 C (-11.0 F)
2016-27.8 C (-18.0 F)
2017-28.3 C (-18.9 F)
2018-27.8 C (-18.0 F)
2019-31.7 C (-25.1 F)
2020-25.6 C (-14.1 F)
2021-32.8 C (-27.0 F)
2022-31.7 C (-25.1 F)
2023-26.7 C (-16.1 F)
2024-37.2 C (-35.0 F)
2025-30.0 C (-22.0 F)
2026-30.6 C (-23.1 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

38 years with a frost

Across 38 years with a frost, the median last spring frost at Knowlton Montana falls on 11 May and the median first autumn frost on 4 October, which leaves a median of 143 days between them.

Fitted over all years, the growing season changes by +2.0 days per decade at this station.

Frost dates and growing season at Knowlton Montana
MeasureMedian, all yearsEarliest periodRecent period (1995 to 2025)Recent against earliestFitted trend
Last spring frost11 Mayn/a11 Mayn/a-0.1 days per decade
First autumn frost4 Octobern/a4 Octobern/a+1.9 days per decade
Growing days143 daysn/a143 daysn/a+2.0 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 Knowlton Montana standing records by year: CSV or JSON. Field meanings are on the data page.
  • Data for Knowlton Montana 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).