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Built 2026-10-16 (16 October 2026)

Grant 12 W Weather Records (USC00243712)

Record envelope, standing records and threshold days for Grant 12 W (USC00243712), Montana, United States, with 40 years of record.

Key Facts for Grant 12 W

  • Grant 12 W (USC00243712) is a weather station in Montana, United States at 45.00 latitude and -113.32 longitude, n/a above sea level.
  • The station reports from 1913 to 1952, 40 years of record.
  • 1,464 records set at Grant 12 W still stand.
  • Records are tracked for no element yet: an element needs 30 years of data to be eligible.

About the Station

  • Location: Montana, United States, 45.00 latitude, -113.32 longitude.
  • Elevation: n/a.
  • Period of record: 1913 to 1952, 40 years.
  • Eligible elements: none yet.

Daily Record Envelope and 2026

0 days at or beyond a record
Daily record high and record low at Grant 12 W, with 2026 drawn through them The band shows the record high and record low for each calendar day at Grant 12 W. The lines show the 2026 daily maximum and minimum. 0 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 Grant 12 W. The lines show the 2026 daily maximum and minimum. 0 days in 2026 matched or passed a record. Temperatures are in degrees Celsius.
Daily record high and record low at Grant 12 W, with 2026 drawn through them
MonthHighest record highLowest record low2026 highest maximum2026 lowest minimum
Jan7.2 C (45.0 F)-38.3 C (-36.9 F)n/an/a
Feb14.4 C (57.9 F)-35.6 C (-32.1 F)n/an/a
Mar14.4 C (57.9 F)-31.7 C (-25.1 F)n/an/a
Apr22.2 C (72.0 F)-21.1 C (-6.0 F)n/an/a
May27.2 C (81.0 F)-17.8 C (0.0 F)n/an/a
Jun33.3 C (91.9 F)-11.7 C (10.9 F)n/an/a
Jul34.4 C (93.9 F)-6.7 C (19.9 F)n/an/a
Aug31.1 C (88.0 F)-3.9 C (25.0 F)n/an/a
Sep28.9 C (84.0 F)-20.6 C (-5.1 F)n/an/a
Oct25.6 C (78.1 F)-20.6 C (-5.1 F)n/an/a
Nov16.7 C (62.1 F)-32.8 C (-27.0 F)n/an/a
Dec10.6 C (51.1 F)-39.4 C (-38.9 F)n/an/a

Which Years Hold Standing Records

1,464 standing records
Standing records at Grant 12 W by the year they were set 1,464 records at Grant 12 W still stand. 1919 holds the most, with 143. 0501001501913: 41914: 781915: 1111916: 1421917: 1401918: 1031919: 1431920: 1021921: 971922: 1221923: 701924: 981925: 691926: 911927: 9419131915191719191921192319251927
1,464 records at Grant 12 W still stand. 1919 holds the most, with 143.
Standing records at Grant 12 W by the year they were set
Year setStanding records
19134
191478
1915111
1916142
1917140
1918103
1919143
1920102
192197
1922122
192370
192498
192569
192691
192794

Wettest Day of Each Month

Jul: 26.7 mm (1.1 in)
Record daily precipitation for each month at Grant 12 W The wettest day on record for each calendar month at Grant 12 W. The most was 26.7 mm (1.1 in) on 5 July 1925. 0102030 Jan: 12.7 mm (0.5 in), 3 January 1921 Jan Feb: 11.2 mm (0.4 in), 2 February 1916 Feb Mar: 17.0 mm (0.7 in), 18 March 1921 Mar Apr: 24.1 mm (0.9 in), 26 April 1919 Apr May: 19.1 mm (0.8 in), 1 May 1915 May Jun: 23.1 mm (0.9 in), 3 June 1925 Jun Jul: 26.7 mm (1.1 in), 5 July 1925 Jul Aug: 25.4 mm (1.0 in), 8 August 1951 Aug Sep: 23.4 mm (0.9 in), 14 September 1918 Sep Oct: 17.3 mm (0.7 in), 18 October 1916 Oct Nov: 13.5 mm (0.5 in), 21 November 1921 Nov Dec: 11.4 mm (0.4 in), 7 December 1950 Dec
The wettest day on record for each calendar month at Grant 12 W. The most was 26.7 mm (1.1 in) on 5 July 1925.
Record daily precipitation for each month at Grant 12 W
MonthRecord daily precipitation (mm)Date
Jan12.7 mm (0.5 in)3 January 1921
Feb11.2 mm (0.4 in)2 February 1916
Mar17.0 mm (0.7 in)18 March 1921
Apr24.1 mm (0.9 in)26 April 1919
May19.1 mm (0.8 in)1 May 1915
Jun23.1 mm (0.9 in)3 June 1925
Jul26.7 mm (1.1 in)5 July 1925
Aug25.4 mm (1.0 in)8 August 1951
Sep23.4 mm (0.9 in)14 September 1918
Oct17.3 mm (0.7 in)18 October 1916
Nov13.5 mm (0.5 in)21 November 1921
Dec11.4 mm (0.4 in)7 December 1950

Period of Record Coverage

1913 to 1927
Days with data per year at Grant 12 W 15 years of record at Grant 12 W, 1913 to 1927. 2 years have data for under 90 percent of days and are left out of rankings: 1913, 1927. 1913: 60 of 365 days1914: 335 of 365 days1915: 363 of 365 days1916: 334 of 366 days1917: 332 of 365 days1918: 330 of 365 days1919: 365 of 365 days1920: 365 of 366 days1921: 363 of 365 days1922: 362 of 365 days1923: 362 of 365 days1924: 364 of 366 days1925: 365 of 365 days1926: 364 of 365 days1927: 300 of 365 days191519201925
15 years of record at Grant 12 W, 1913 to 1927. 2 years have data for under 90 percent of days and are left out of rankings: 1913, 1927.
Days with data per year at Grant 12 W
YearDays with dataShare of yearComplete
19136016%No
191433592%Yes
191536399%Yes
191633491%Yes
191733291%Yes
191833090%Yes
1919365100%Yes
1920365100%Yes
192136399%Yes
192236299%Yes
192336299%Yes
192436499%Yes
1925365100%Yes
1926364100%Yes
192730082%No

Latest Records

0

No records were set at this station in the latest data.

Extremes by Year

1913 to 1952
Yearly extremes at Grant 12 W: the record and the median year
MeasureRecordYear of the recordMedian yearYears with a value
Hottest day (TXx)34.4 C (93.9 F)191930.6 C (87.1 F)15
Coldest night (TNn)-39.4 C (-38.9 F)1924-32.8 C (-27.0 F)15
Wettest day (Rx1day)26.7 mm (1.1 in)192519.7 mm (0.8 in)18
Wettest five days (Rx5day)62.0 mm (2.4 in)191528.1 mm (1.1 in)18
Longest dry spell (CDD)64 days195235 days18

Hottest day (TXx)

Hottest day (TXx) at Grant 12 W by year The hottest day of the year at Grant 12 W, 1913 to 1952. The record is 34.4 C (93.9 F) in 1919, marked on the chart; the median year is 30.6 C (87.1 F). 15202530351920193019401950Record: 34.4 C (93.9 F) in 1919
The hottest day of the year at Grant 12 W, 1913 to 1952. The record is 34.4 C (93.9 F) in 1919, marked on the chart; the median year is 30.6 C (87.1 F).
Hottest day (TXx) at Grant 12 W by year
YearHottest day (TXx)
191315.6 C (60.1 F)
191430.0 C (86.0 F)
191531.1 C (88.0 F)
191629.4 C (84.9 F)
191732.2 C (90.0 F)
191831.1 C (88.0 F)
191934.4 C (93.9 F)
192030.0 C (86.0 F)
192134.4 C (93.9 F)
192229.4 C (84.9 F)
192329.4 C (84.9 F)
192431.1 C (88.0 F)
192530.6 C (87.1 F)
192631.1 C (88.0 F)
192727.8 C (82.0 F)
1950n/a
1951n/a
1952n/a

Coldest night (TNn)

Coldest night (TNn) at Grant 12 W by year The coldest night of the year at Grant 12 W, 1913 to 1952. The record is -39.4 C (-38.9 F) in 1924, marked on the chart; the median year is -32.8 C (-27.0 F). -40-30-20-101920193019401950Record: -39.4 C (-38.9 F) in 1924
The coldest night of the year at Grant 12 W, 1913 to 1952. The record is -39.4 C (-38.9 F) in 1924, marked on the chart; the median year is -32.8 C (-27.0 F).
Coldest night (TNn) at Grant 12 W by year
YearColdest night (TNn)
1913-18.3 C (-0.9 F)
1914-35.0 C (-31.0 F)
1915-32.8 C (-27.0 F)
1916-38.3 C (-36.9 F)
1917-26.7 C (-16.1 F)
1918-31.7 C (-25.1 F)
1919-38.3 C (-36.9 F)
1920-31.7 C (-25.1 F)
1921-28.3 C (-18.9 F)
1922-35.6 C (-32.1 F)
1923-35.6 C (-32.1 F)
1924-39.4 C (-38.9 F)
1925-21.1 C (-6.0 F)
1926-32.8 C (-27.0 F)
1927-36.1 C (-33.0 F)
1950n/a
1951n/a
1952n/a

Wettest day (Rx1day)

Wettest day (Rx1day) at Grant 12 W by year The wettest day of the year at Grant 12 W, 1913 to 1952. The record is 26.7 mm (1.1 in) in 1925, marked on the chart; the median year is 19.7 mm (0.8 in). 510152025301920193019401950Record: 26.7 mm (1.1 in) in 1925
The wettest day of the year at Grant 12 W, 1913 to 1952. The record is 26.7 mm (1.1 in) in 1925, marked on the chart; the median year is 19.7 mm (0.8 in).
Wettest day (Rx1day) at Grant 12 W by year
YearWettest day (Rx1day)
19139.9 mm (0.39 in)
191422.4 mm (0.9 in)
191520.6 mm (0.8 in)
191617.3 mm (0.7 in)
191712.7 mm (0.5 in)
191823.4 mm (0.9 in)
191924.1 mm (0.9 in)
192019.1 mm (0.8 in)
192117.0 mm (0.7 in)
192212.7 mm (0.5 in)
192315.2 mm (0.6 in)
19249.7 mm (0.38 in)
192526.7 mm (1.1 in)
192621.1 mm (0.8 in)
192722.4 mm (0.9 in)
195020.3 mm (0.8 in)
195125.4 mm (1.0 in)
195212.7 mm (0.5 in)

Wettest five days (Rx5day)

Wettest five days (Rx5day) at Grant 12 W by year The wettest five days of the year at Grant 12 W, 1913 to 1952. The record is 62.0 mm (2.4 in) in 1915, marked on the chart; the median year is 28.1 mm (1.1 in). 0204060801920193019401950Record: 62.0 mm (2.4 in) in 1915
The wettest five days of the year at Grant 12 W, 1913 to 1952. The record is 62.0 mm (2.4 in) in 1915, marked on the chart; the median year is 28.1 mm (1.1 in).
Wettest five days (Rx5day) at Grant 12 W by year
YearWettest five days (Rx5day)
191316.5 mm (0.6 in)
191444.0 mm (1.7 in)
191562.0 mm (2.4 in)
191626.2 mm (1.0 in)
191720.6 mm (0.8 in)
191828.0 mm (1.1 in)
191924.1 mm (0.9 in)
192033.1 mm (1.3 in)
192134.0 mm (1.3 in)
192228.2 mm (1.1 in)
192333.0 mm (1.3 in)
192417.3 mm (0.7 in)
192560.5 mm (2.4 in)
192639.9 mm (1.6 in)
192727.7 mm (1.1 in)
195037.6 mm (1.5 in)
195125.4 mm (1.0 in)
195223.6 mm (0.9 in)

Longest dry spell (CDD)

Longest dry spell (CDD) at Grant 12 W by year The longest dry spell of the year at Grant 12 W, 1913 to 1952. The record is 64 days in 1952, marked on the chart; the median year is 35 days. 0204060801920193019401950Record: 64 days in 1952
The longest dry spell of the year at Grant 12 W, 1913 to 1952. The record is 64 days in 1952, marked on the chart; the median year is 35 days.
Longest dry spell (CDD) at Grant 12 W by year
YearLongest dry spell (CDD)
191340 days
191432 days
191517 days
191618 days
191752 days
191822 days
191946 days
192024 days
192140 days
192257 days
192329 days
192441 days
192529 days
192637 days
192722 days
195027 days
195138 days
195264 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.

Download the Data

  • Data for Grant 12 W standing records by year: CSV or JSON. Field meanings are on the data page.
  • Data for Grant 12 W 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 (2025-12-31).