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Armells Creek Montana Weather Records (USR0000MARM)

Record envelope, standing records and threshold days for Armells Creek Montana (USR0000MARM), Montana, United States, with 33 years of record.

Key Facts for Armells Creek Montana

  • Armells Creek Montana (USR0000MARM) is a weather station in Montana, United States at 47.59 latitude and -108.87 longitude, 867 m (2,845 ft) above sea level.
  • The station reports from 1991 to 2023, 33 years of record.
  • 1,464 records set at Armells Creek Montana still stand.
  • Records are tracked for tmax, tmin: an element needs 30 years of data to be eligible.
  • Armells Creek Montana set a daily record high maximum temperature of 31.7 C (89.1 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, 47.59 latitude, -108.87 longitude.
  • Elevation: 867 m (2,845 ft).
  • Period of record: 1991 to 2023, 33 years.
  • Eligible elements: tmax, tmin.

Daily Record Envelope and 2026

28 days at or beyond a record
Daily record high and record low at Armells Creek Montana, with 2026 drawn through them The band shows the record high and record low for each calendar day at Armells Creek Montana. The lines show the 2026 daily maximum and minimum. 28 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 Armells Creek Montana. The lines show the 2026 daily maximum and minimum. 28 days in 2026 matched or passed a record. Temperatures are in degrees Celsius.
Daily record high and record low at Armells Creek Montana, with 2026 drawn through them
MonthHighest record highLowest record low2026 highest maximum2026 lowest minimum
Jan21.1 C (70.0 F)-36.7 C (-34.1 F)17.2 C (63.0 F)-25.6 C (-14.1 F)
Feb23.3 C (73.9 F)-36.1 C (-33.0 F)20.6 C (69.1 F)-22.2 C (-8.0 F)
Mar27.8 C (82.0 F)-29.4 C (-20.9 F)25.6 C (78.1 F)-16.7 C (1.9 F)
Apr31.7 C (89.1 F)-18.9 C (-2.0 F)28.9 C (84.0 F)-6.7 C (19.9 F)
May34.4 C (93.9 F)-7.8 C (18.0 F)33.3 C (91.9 F)-5.0 C (23.0 F)
Jun41.1 C (106.0 F)0.6 C (33.1 F)29.4 C (84.9 F)3.9 C (39.0 F)
Jul45.0 C (113.0 F)5.6 C (42.1 F)45.0 C (113.0 F)10.0 C (50.0 F)
Aug42.8 C (109.0 F)1.1 C (34.0 F)42.8 C (109.0 F)8.3 C (46.9 F)
Sep41.1 C (106.0 F)-6.7 C (19.9 F)32.2 C (90.0 F)2.2 C (36.0 F)
Oct34.4 C (93.9 F)-22.8 C (-9.0 F)31.7 C (89.1 F)0.6 C (33.1 F)
Nov27.2 C (81.0 F)-26.7 C (-16.1 F)n/an/a
Dec23.3 C (73.9 F)-35.6 C (-32.1 F)n/an/a

Which Years Hold Standing Records

1,464 standing records
Standing records at Armells Creek Montana by the year they were set 1,464 records at Armells Creek Montana still stand. 1996 holds the most, with 81. 02550751001991: 121992: 751993: 491994: 411995: 391996: 811997: 581998: 321999: 432000: 372001: 282002: 612003: 542004: 352005: 602006: 362007: 382008: 332009: 372010: 302011: 352012: 382013: 322014: 332015: 342016: 262017: 362018: 302019: 372020: 492021: 582022: 502023: 242024: 222025: 412026: 40199119951999200320072011201520192023
1,464 records at Armells Creek Montana still stand. 1996 holds the most, with 81.
Standing records at Armells Creek Montana by the year they were set
Year setStanding records
199112
199275
199349
199441
199539
199681
199758
199832
199943
200037
200128
200261
200354
200435
200560
200636
200738
200833
200937
201030
201135
201238
201332
201433
201534
201626
201736
201830
201937
202049
202158
202250
202324
202422
202541
202640

All-Time Record Progression

2 new records
When Armells Creek Montana set new all-time records 2 all-time records were set at Armells Creek Montana between 21 December 2022 and 12 July 2026. Each dot is a new record. Record low maximum temperatureRecord high maximum temperature21 December 2022: Record low maximum temperature -26.1 C (-15.0 F)12 July 2026: Record high maximum temperature 45.0 C (113.0 F)2025
2 all-time records were set at Armells Creek Montana between 21 December 2022 and 12 July 2026. Each dot is a new record.
When Armells Creek Montana set new all-time records
DateKindDetail
2022-12-21Record low maximum temperatureRecord low maximum temperature -26.1 C (-15.0 F)
2026-07-12Record high maximum temperatureRecord high maximum temperature 45.0 C (113.0 F)

Period of Record Coverage

1991 to 2026
Days with data per year at Armells Creek Montana 36 years of record at Armells Creek Montana, 1991 to 2026. 3 years have data for under 90 percent of days and are left out of rankings: 1991, 2024, 2026. 1991: 68 of 365 days1992: 364 of 366 days1993: 353 of 365 days1994: 362 of 365 days1995: 363 of 365 days1996: 362 of 366 days1997: 359 of 365 days1998: 363 of 365 days1999: 365 of 365 days2000: 366 of 366 days2001: 365 of 365 days2002: 360 of 365 days2003: 354 of 365 days2004: 363 of 366 days2005: 360 of 365 days2006: 365 of 365 days2007: 364 of 365 days2008: 363 of 366 days2009: 363 of 365 days2010: 365 of 365 days2011: 364 of 365 days2012: 363 of 366 days2013: 361 of 365 days2014: 360 of 365 days2015: 362 of 365 days2016: 363 of 366 days2017: 363 of 365 days2018: 363 of 365 days2019: 362 of 365 days2020: 362 of 366 days2021: 364 of 365 days2022: 363 of 365 days2023: 363 of 365 days2024: 316 of 366 days2025: 363 of 365 days2026: 282 of 365 days1995200020052010201520202025
36 years of record at Armells Creek Montana, 1991 to 2026. 3 years have data for under 90 percent of days and are left out of rankings: 1991, 2024, 2026.
Days with data per year at Armells Creek Montana
YearDays with dataShare of yearComplete
19916819%No
199236499%Yes
199335397%Yes
199436299%Yes
199536399%Yes
199636299%Yes
199735998%Yes
199836399%Yes
1999365100%Yes
2000366100%Yes
2001365100%Yes
200236099%Yes
200335497%Yes
200436399%Yes
200536099%Yes
2006365100%Yes
2007364100%Yes
200836399%Yes
200936399%Yes
2010365100%Yes
2011364100%Yes
201236399%Yes
201336199%Yes
201436099%Yes
201536299%Yes
201636399%Yes
201736399%Yes
201836399%Yes
201936299%Yes
202036299%Yes
2021364100%Yes
202236399%Yes
202336399%Yes
202431686%No
202536399%Yes
202628277%No

Latest Records

20
Latest records at Armells Creek Montana
DateStationRecordValueBeat old record byOld record stoodSignificance
9 October 2026Armells Creek Montana, USdaily high max (Provisional)31.7 C (89.1 F)2.3 C (4.1 F)11 years9 of 100 (Routine)
7 October 2026Armells Creek Montana, USdaily high min (Provisional)11.1 C (52.0 F)0.5 C (0.9 F)23 years9 of 100 (Routine)
25 September 2026Armells Creek Montana, USdaily high min (Provisional)13.9 C (57.0 F)1.1 C (2.0 F)24 years12 of 100 (Routine)
27 August 2026Armells Creek Montana, USdaily high min (Provisional)18.3 C (64.9 F)0.5 C (0.9 F)28 years12 of 100 (Routine)
13 August 2026Armells Creek Montana, USdaily low max16.7 C (62.1 F)1.1 C (2.0 F)31 years14 of 100 (Routine)
1 August 2026Armells Creek Montana, USmonthly high max42.8 C (109.0 F)0.6 C (1.1 F)7 years16 of 100 (Routine)
26 July 2026Armells Creek Montana, USdaily high min21.1 C (70.0 F)1.1 C (2.0 F)21 years12 of 100 (Routine)
26 July 2026Armells Creek Montana, USdaily high max (Tie)36.7 C (98.1 F)tie4 years1 of 100 (Routine)
25 July 2026Armells Creek Montana, USdaily high max42.2 C (108.0 F)5.0 C (9.0 F)1 year12 of 100 (Routine)
18 July 2026Armells Creek Montana, USdaily high min21.7 C (71.1 F)0.6 C (1.1 F)19 years9 of 100 (Routine)
12 July 2026Armells Creek Montana, USall-time high max45.0 C (113.0 F)2.8 C (5.0 F)7 years30 of 100 (Routine)
11 July 2026Armells Creek Montana, USdaily high max41.1 C (106.0 F)2.8 C (5.0 F)1 year8 of 100 (Routine)
28 June 2026Armells Creek Montana, USdaily low max17.2 C (63.0 F)0.6 C (1.1 F)31 years13 of 100 (Routine)
1 June 2026Armells Creek Montana, USdaily low max10.0 C (50.0 F)2.2 C (4.0 F)32 years16 of 100 (Routine)
29 May 2026Armells Creek Montana, USdaily high max32.8 C (91.0 F)2.2 C (4.0 F)23 years12 of 100 (Routine)
29 May 2026Armells Creek Montana, USdaily high min17.8 C (64.0 F)0.6 C (1.1 F)23 years10 of 100 (Routine)
28 May 2026Armells Creek Montana, USdaily high min16.1 C (61.0 F)2.8 C (5.0 F)27 years17 of 100 (Routine)
27 May 2026Armells Creek Montana, USmonthly high min18.9 C (66.0 F)1.1 C (2.0 F)30 years24 of 100 (Routine)
27 May 2026Armells Creek Montana, USdaily high max31.7 C (89.1 F)1.1 C (2.0 F)27 years12 of 100 (Routine)
26 May 2026Armells Creek Montana, USdaily high max33.3 C (91.9 F)2.7 C (4.9 F)28 years15 of 100 (Routine)

Climate Trend

33 complete years, 1992 to 2025
Annual mean temperature at Armells Creek Montana as warming stripes, 1992 to 2025 One stripe for each of 33 complete years at Armells Creek Montana, 1992 to 2025. Blue stripes are years cooler than the station's own mean of 8.4 C (47.1 F); red stripes are warmer. The coolest year was 1996, at 5.9 C (42.6 F), and the warmest was 2006, at 9.7 C (49.5 F). The strongest colour marks a difference of 2.5 C (4.5 F). 1992: 8.8 C, +0.4 C from the station mean1993: 6.6 C, -1.7 C from the station mean1994: 8.3 C, -0.1 C from the station mean1995: 7.8 C, -0.6 C from the station mean1996: 5.9 C, -2.5 C from the station mean1997: 8.1 C, -0.2 C from the station mean1998: 9.2 C, +0.9 C from the station mean1999: 9.4 C, +1.0 C from the station mean2000: 8.2 C, -0.2 C from the station mean2001: 9.5 C, +1.1 C from the station mean2002: 7.8 C, -0.6 C from the station mean2003: 8.9 C, +0.5 C from the station mean2004: 8.3 C, 0.0 C from the station mean2005: 8.8 C, +0.4 C from the station mean2006: 9.7 C, +1.3 C from the station mean2007: 9.5 C, +1.1 C from the station mean2008: 7.8 C, -0.6 C from the station mean2009: 7.4 C, -1.0 C from the station mean2010: 7.7 C, -0.6 C from the station mean2011: 8.2 C, -0.2 C from the station mean2012: 9.6 C, +1.2 C from the station mean2013: 8.3 C, 0.0 C from the station mean2014: 7.8 C, -0.5 C from the station mean2015: 9.3 C, +0.9 C from the station mean2016: 9.4 C, +1.1 C from the station mean2017: 8.9 C, +0.5 C from the station mean2018: 7.1 C, -1.3 C from the station mean2019: 6.3 C, -2.0 C from the station mean2020: 8.7 C, +0.4 C from the station mean2021: 8.9 C, +0.5 C from the station mean2022: 7.9 C, -0.5 C from the station mean2023: 9.3 C, +0.9 C from the station mean2025: 8.7 C, +0.4 C from the station mean19921995200020052010201520202025
One stripe for each of 33 complete years at Armells Creek Montana, 1992 to 2025. Blue stripes are years cooler than the station's own mean of 8.4 C (47.1 F); red stripes are warmer. The coolest year was 1996, at 5.9 C (42.6 F), and the warmest was 2006, at 9.7 C (49.5 F). The strongest colour marks a difference of 2.5 C (4.5 F).
Annual mean temperature at Armells Creek Montana as warming stripes, 1992 to 2025
YearAnnual mean temperatureDifference from the station mean
19928.8 C+0.41 C
19936.6 C-1.73 C
19948.3 C-0.09 C
19957.8 C-0.57 C
19965.9 C-2.46 C
19978.1 C-0.24 C
19989.2 C+0.87 C
19999.4 C+1.05 C
20008.2 C-0.16 C
20019.5 C+1.11 C
20027.8 C-0.60 C
20038.9 C+0.51 C
20048.3 C-0.03 C
20058.8 C+0.40 C
20069.7 C+1.35 C
20079.5 C+1.10 C
20087.8 C-0.61 C
20097.4 C-1.01 C
20107.7 C-0.63 C
20118.2 C-0.21 C
20129.6 C+1.24 C
20138.3 C-0.03 C
20147.8 C-0.54 C
20159.3 C+0.91 C
20169.4 C+1.06 C
20178.9 C+0.54 C
20187.1 C-1.25 C
20196.3 C-2.04 C
20208.7 C+0.36 C
20218.9 C+0.51 C
20227.9 C-0.45 C
20239.3 C+0.95 C
20258.7 C+0.37 C

The fitted trend in annual mean temperature here over 1992 to 2025 is 0.1 C (-0.2 to 0.5) per decade. The interval includes zero, so the trend is not clearly different from zero. In Fahrenheit: 0.2 F (-0.4 to 0.9) per decade. The slope is a straight line fitted to 33 complete years; the brackets give its 95 percent interval.

Fitted temperature trends per decade at Armells Creek Montana
MeasurePer decade (C)Per decade (F)PeriodComplete yearsReading
Annual mean temperature0.1 C (-0.2 to 0.5) per decade0.2 F (-0.4 to 0.9) per decade1992 to 202533Not clearly different from zero
Mean daily maximum0.1 C (-0.3 to 0.5) per decade0.3 F (-0.5 to 1.0) per decade1992 to 202533Not clearly different from zero
Mean daily minimum0.1 C (-0.2 to 0.5) per decade0.2 F (-0.4 to 0.8) per decade1992 to 202533Not 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

1991 to 2026
Yearly extremes at Armells Creek Montana: the record and the median year
MeasureRecordYear of the recordMedian yearYears with a value
Hottest day (TXx)45.0 C (113.0 F)202639.7 C (103.5 F)36
Coldest night (TNn)-36.7 C (-34.1 F)1997-30.0 C (-22.0 F)36

Hottest day (TXx)

Hottest day (TXx) at Armells Creek Montana by year The hottest day of the year at Armells Creek Montana, 1991 to 2026. The record is 45.0 C (113.0 F) in 2026, marked on the chart; the median year is 39.7 C (103.5 F). 1020304050200020102020Record: 45.0 C (113.0 F) in 2026
The hottest day of the year at Armells Creek Montana, 1991 to 2026. The record is 45.0 C (113.0 F) in 2026, marked on the chart; the median year is 39.7 C (103.5 F).
Hottest day (TXx) at Armells Creek Montana by year
YearHottest day (TXx)
199116.1 C (61.0 F)
199237.2 C (99.0 F)
199333.9 C (93.0 F)
199437.8 C (100.0 F)
199538.9 C (102.0 F)
199638.9 C (102.0 F)
199738.3 C (100.9 F)
199838.9 C (102.0 F)
199940.6 C (105.1 F)
200040.0 C (104.0 F)
200141.1 C (106.0 F)
200240.6 C (105.1 F)
200341.7 C (107.1 F)
200440.6 C (105.1 F)
200539.4 C (102.9 F)
200640.0 C (104.0 F)
200741.7 C (107.1 F)
200841.7 C (107.1 F)
200937.2 C (99.0 F)
201040.6 C (105.1 F)
201141.1 C (106.0 F)
201240.0 C (104.0 F)
201338.3 C (100.9 F)
201436.7 C (98.1 F)
201537.8 C (100.0 F)
201638.3 C (100.9 F)
201739.4 C (102.9 F)
201842.2 C (108.0 F)
201936.7 C (98.1 F)
202038.3 C (100.9 F)
202141.1 C (106.0 F)
202241.7 C (107.1 F)
202340.6 C (105.1 F)
202442.2 C (108.0 F)
202538.3 C (100.9 F)
202645.0 C (113.0 F)

Coldest night (TNn)

Coldest night (TNn) at Armells Creek Montana by year The coldest night of the year at Armells Creek Montana, 1991 to 2026. The record is -36.7 C (-34.1 F) in 1997, marked on the chart; the median year is -30.0 C (-22.0 F). -40-35-30-25-20-15200020102020Record: -36.7 C (-34.1 F) in 1997
The coldest night of the year at Armells Creek Montana, 1991 to 2026. The record is -36.7 C (-34.1 F) in 1997, marked on the chart; the median year is -30.0 C (-22.0 F).
Coldest night (TNn) at Armells Creek Montana by year
YearColdest night (TNn)
1991-22.2 C (-8.0 F)
1992-31.7 C (-25.1 F)
1993-27.2 C (-17.0 F)
1994-35.6 C (-32.1 F)
1995-26.1 C (-15.0 F)
1996-36.1 C (-33.0 F)
1997-36.7 C (-34.1 F)
1998-33.9 C (-29.0 F)
1999-21.7 C (-7.1 F)
2000-28.9 C (-20.0 F)
2001-27.2 C (-17.0 F)
2002-28.9 C (-20.0 F)
2003-29.4 C (-20.9 F)
2004-30.0 C (-22.0 F)
2005-34.4 C (-29.9 F)
2006-29.4 C (-20.9 F)
2007-26.1 C (-15.0 F)
2008-32.2 C (-26.0 F)
2009-30.0 C (-22.0 F)
2010-31.1 C (-24.0 F)
2011-32.8 C (-27.0 F)
2012-26.7 C (-16.1 F)
2013-35.6 C (-32.1 F)
2014-32.2 C (-26.0 F)
2015-23.9 C (-11.0 F)
2016-30.6 C (-23.1 F)
2017-27.2 C (-17.0 F)
2018-32.2 C (-26.0 F)
2019-31.7 C (-25.1 F)
2020-27.2 C (-17.0 F)
2021-34.4 C (-29.9 F)
2022-32.2 C (-26.0 F)
2023-27.2 C (-17.0 F)
2024-17.2 C (1.0 F)
2025-35.0 C (-31.0 F)
2026-25.6 C (-14.1 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

33 years with a frost

Across 33 years with a frost, the median last spring frost at Armells Creek Montana falls on 10 May and the median first autumn frost on 28 September, which leaves a median of 142 days between them.

Fitted over all years, the growing season changes by +1.9 days per decade at this station.

Frost dates and growing season at Armells Creek Montana
MeasureMedian, all yearsEarliest periodRecent period (1995 to 2025)Recent against earliestFitted trend
Last spring frost10 Mayn/a10 Mayn/a-0.3 days per decade
First autumn frost28 Septembern/a28 Septembern/a+1.6 days per decade
Growing days142 daysn/a142 daysn/a+1.9 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 Armells Creek Montana standing records by year: CSV or JSON. Field meanings are on the data page.
  • Data for Armells Creek 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 2026-10-13 (13 October 2026). Records are computed by this site and are not official.

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