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Built 2026-10-17 (17 October 2026)

Harb Weather Records (USC00243910)

Record envelope, standing records and threshold days for Harb (USC00243910), Montana, United States, with 68 years of record.

Key Facts for Harb

  • Harb (USC00243910) is a weather station in Montana, United States at 48.23 latitude and -107.41 longitude, 775 m (2,542 ft) above sea level.
  • The station reports from 1951 to 2018, 68 years of record.
  • 0 records set at Harb still stand.
  • Records are tracked for prcp, snow, snwd: an element needs 30 years of data to be eligible.
  • Harb set a daily record precipitation of 22.9 mm (0.9 in) on 28 August 2018.

About the Station

  • Location: Montana, United States, 48.23 latitude, -107.41 longitude.
  • Elevation: 775 m (2,542 ft).
  • Period of record: 1951 to 2018, 68 years.
  • Eligible elements: prcp, snow, snwd.

Daily Record Envelope and 2026

0 days at or beyond a record
Daily record high and record low at Harb, with 2026 drawn through them The band shows the record high and record low for each calendar day at Harb. The lines show the 2026 daily maximum and minimum. 0 days in 2026 matched or passed a record. Temperatures are in degrees Celsius. 000111 JanFebMarAprMayJunJulAugSepOctNovDec
The band shows the record high and record low for each calendar day at Harb. 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 Harb, with 2026 drawn through them
MonthHighest record highLowest record low2026 highest maximum2026 lowest minimum
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Decn/an/an/an/a

Which Years Hold Standing Records

0 standing records
Standing records at Harb by the year they were set 0 records at Harb still stand. 00000000000
0 records at Harb still stand.
Standing records at Harb by the year they were set
Year setStanding records

All-Time Record Progression

2 new records
When Harb set new all-time records 2 all-time records were set at Harb between 12 May 1983 and 11 June 2016. Each dot is a new record. Record daily snowfallRecord daily precipitation12 May 1983: Record daily snowfall 27.9 cm (11.0 in)11 June 2016: Record daily precipitation 128.3 mm (5.1 in)1985199019952000200520102015
2 all-time records were set at Harb between 12 May 1983 and 11 June 2016. Each dot is a new record.
When Harb set new all-time records
DateKindDetail
1983-05-12Record daily snowfallRecord daily snowfall 27.9 cm (11.0 in)
2016-06-11Record daily precipitationRecord daily precipitation 128.3 mm (5.1 in)

Wettest Day of Each Month

Jun: 128.3 mm (5.1 in)
Record daily precipitation for each month at Harb The wettest day on record for each calendar month at Harb. The most was 128.3 mm (5.1 in) on 11 June 2016. 050100150 Jan: 8.9 mm (0.35 in), 8 January 1971 Jan Feb: 7.1 mm (0.28 in), 8 February 2002 Feb Mar: 14.0 mm (0.6 in), 11 March 1954 Mar Apr: 39.6 mm (1.6 in), 15 April 2016 Apr May: 52.6 mm (2.1 in), 1 May 2008 May Jun: 128.3 mm (5.1 in), 11 June 2016 Jun Jul: 89.4 mm (3.5 in), 14 July 1962 Jul Aug: 60.2 mm (2.4 in), 20 August 1964 Aug Sep: 66.0 mm (2.6 in), 12 September 1978 Sep Oct: 71.1 mm (2.8 in), 4 October 2016 Oct Nov: 25.4 mm (1.0 in), 3 November 1951 Nov Dec: 19.1 mm (0.8 in), 27 December 2003 Dec
The wettest day on record for each calendar month at Harb. The most was 128.3 mm (5.1 in) on 11 June 2016.
Record daily precipitation for each month at Harb
MonthRecord daily precipitation (mm)Date
Jan8.9 mm (0.35 in)8 January 1971
Feb7.1 mm (0.28 in)8 February 2002
Mar14.0 mm (0.6 in)11 March 1954
Apr39.6 mm (1.6 in)15 April 2016
May52.6 mm (2.1 in)1 May 2008
Jun128.3 mm (5.1 in)11 June 2016
Jul89.4 mm (3.5 in)14 July 1962
Aug60.2 mm (2.4 in)20 August 1964
Sep66.0 mm (2.6 in)12 September 1978
Oct71.1 mm (2.8 in)4 October 2016
Nov25.4 mm (1.0 in)3 November 1951
Dec19.1 mm (0.8 in)27 December 2003

Latest Records

20
Latest records at Harb
DateStationRecordValueBeat old record byOld record stoodSignificance
28 August 2018Harb, USdaily rain22.9 mm (0.9 in)14.8 mm (0.6 in)61 years20 of 100 (Routine)
27 August 2018Harb, USdaily rain18.3 mm (0.7 in)8.9 mm (0.35 in)55 years20 of 100 (Routine)
27 July 2018Harb, USdaily rain34.5 mm (1.4 in)14.2 mm (0.6 in)1 year21 of 100 (Routine)
11 July 2017Harb, USdaily rain13.2 mm (0.5 in)3.5 mm (0.14 in)55 years20 of 100 (Routine)
1 November 2016Harb, USdaily rain10.7 mm (0.4 in)1.6 mm (0.06 in)42 years20 of 100 (Routine)
4 October 2016Harb, USmonthly rain71.1 mm (2.8 in)38.1 mm (1.5 in)0 years56 of 100 (Notable)
3 October 2016Harb, USmonthly rain33.0 mm (1.3 in)3.0 mm (0.12 in)53 years37 of 100 (Notable)
25 September 2016Harb, USdaily rain1.3 mm (0.05 in)0.5 mm (0.02 in)65 years20 of 100 (Routine)
24 September 2016Harb, USdaily rain29.5 mm (1.2 in)20.4 mm (0.8 in)8 years33 of 100 (Routine)
13 August 2016Harb, USdaily rain16.8 mm (0.7 in)10.7 mm (0.4 in)56 years20 of 100 (Routine)
27 July 2016Harb, USdaily rain20.3 mm (0.8 in)12.2 mm (0.5 in)39 years20 of 100 (Routine)
19 July 2016Harb, USdaily rain38.1 mm (1.5 in)7.6 mm (0.30 in)44 years27 of 100 (Routine)
11 June 2016Harb, USall-time rain128.3 mm (5.1 in)38.9 mm (1.5 in)53 years80 of 100 (Exceptional)
25 April 2016Harb, USdaily rain12.7 mm (0.5 in)4.8 mm (0.19 in)1 year14 of 100 (Routine)
15 April 2016Harb, USmonthly rain39.6 mm (1.6 in)1.2 mm (0.05 in)6 years20 of 100 (Routine)
5 April 2016Harb, USdaily rain12.7 mm (0.5 in)8.9 mm (0.35 in)58 years20 of 100 (Routine)
14 December 2015Harb, USdaily rain5.6 mm (0.22 in)3.1 mm (0.12 in)37 years20 of 100 (Routine)
4 November 2015Harb, USdaily rain24.1 mm (0.9 in)3.8 mm (0.15 in)64 years20 of 100 (Routine)
16 September 2015Harb, USdaily rain16.8 mm (0.7 in)0.8 mm (0.03 in)60 years20 of 100 (Routine)
11 August 2015Harb, USdaily rain4.8 mm (0.19 in)1.0 mm (0.04 in)40 years19 of 100 (Routine)

Extremes by Year

1951 to 2018
Yearly extremes at Harb: the record and the median year
MeasureRecordYear of the recordMedian yearYears with a value
Wettest day (Rx1day)128.3 mm (5.1 in)201633.7 mm (1.3 in)54
Wettest five days (Rx5day)147.9 mm (5.8 in)201650.1 mm (2.0 in)53
Longest dry spell (CDD)80 days198541 days54

Wettest day (Rx1day)

Wettest day (Rx1day) at Harb by year The wettest day of the year at Harb, 1951 to 2018. The record is 128.3 mm (5.1 in) in 2016, marked on the chart; the median year is 33.7 mm (1.3 in). 050100150196019802000Record: 128.3 mm (5.1 in) in 2016
The wettest day of the year at Harb, 1951 to 2018. The record is 128.3 mm (5.1 in) in 2016, marked on the chart; the median year is 33.7 mm (1.3 in).
Wettest day (Rx1day) at Harb by year
YearWettest day (Rx1day)
195134.3 mm (1.4 in)
195230.7 mm (1.2 in)
195342.2 mm (1.7 in)
195439.1 mm (1.5 in)
195544.5 mm (1.8 in)
195617.5 mm (0.7 in)
195724.6 mm (1.0 in)
195814.5 mm (0.6 in)
195919.1 mm (0.8 in)
196021.6 mm (0.9 in)
196123.1 mm (0.9 in)
196289.4 mm (3.5 in)
196356.6 mm (2.2 in)
196460.2 mm (2.4 in)
196540.1 mm (1.6 in)
196618.3 mm (0.7 in)
196735.6 mm (1.4 in)
196830.5 mm (1.2 in)
196936.8 mm (1.4 in)
197037.3 mm (1.5 in)
197118.3 mm (0.7 in)
197230.5 mm (1.2 in)
197329.7 mm (1.2 in)
197453.8 mm (2.1 in)
197532.3 mm (1.3 in)
197653.3 mm (2.1 in)
197720.8 mm (0.8 in)
197866.0 mm (2.6 in)
197927.9 mm (1.1 in)
198029.2 mm (1.1 in)
198132.0 mm (1.3 in)
198249.8 mm (2.0 in)
198359.2 mm (2.3 in)
198414.2 mm (0.6 in)
198512.7 mm (0.5 in)
200033.0 mm (1.3 in)
200145.7 mm (1.8 in)
200238.1 mm (1.5 in)
200319.1 mm (0.8 in)
200416.5 mm (0.6 in)
200538.1 mm (1.5 in)
200629.2 mm (1.1 in)
200745.7 mm (1.8 in)
200852.6 mm (2.1 in)
200938.4 mm (1.5 in)
201045.7 mm (1.8 in)
201131.8 mm (1.3 in)
201225.4 mm (1.0 in)
201330.7 mm (1.2 in)
201460.7 mm (2.4 in)
201587.6 mm (3.4 in)
2016128.3 mm (5.1 in)
201713.2 mm (0.5 in)
201834.5 mm (1.4 in)

Wettest five days (Rx5day)

Wettest five days (Rx5day) at Harb by year The wettest five days of the year at Harb, 1951 to 2018. The record is 147.9 mm (5.8 in) in 2016, marked on the chart; the median year is 50.1 mm (2.0 in). 050100150196019802000Record: 147.9 mm (5.8 in) in 2016
The wettest five days of the year at Harb, 1951 to 2018. The record is 147.9 mm (5.8 in) in 2016, marked on the chart; the median year is 50.1 mm (2.0 in).
Wettest five days (Rx5day) at Harb by year
YearWettest five days (Rx5day)
195150.1 mm (2.0 in)
195246.5 mm (1.8 in)
195368.1 mm (2.7 in)
195448.8 mm (1.9 in)
195549.7 mm (2.0 in)
195626.9 mm (1.1 in)
195728.4 mm (1.1 in)
195825.7 mm (1.0 in)
195927.4 mm (1.1 in)
196021.6 mm (0.9 in)
196123.4 mm (0.9 in)
1962115.3 mm (4.5 in)
196379.7 mm (3.1 in)
196476.2 mm (3.0 in)
196566.0 mm (2.6 in)
196631.4 mm (1.2 in)
196773.2 mm (2.9 in)
196852.3 mm (2.1 in)
196961.4 mm (2.4 in)
197092.4 mm (3.6 in)
197129.9 mm (1.2 in)
197242.2 mm (1.7 in)
197339.6 mm (1.6 in)
197454.6 mm (2.1 in)
197551.9 mm (2.0 in)
197657.1 mm (2.2 in)
197730.8 mm (1.2 in)
197882.5 mm (3.2 in)
197930.5 mm (1.2 in)
198030.7 mm (1.2 in)
198141.1 mm (1.6 in)
198267.0 mm (2.6 in)
198368.3 mm (2.7 in)
198427.9 mm (1.1 in)
198521.6 mm (0.9 in)
200048.2 mm (1.9 in)
200153.3 mm (2.1 in)
200252.9 mm (2.1 in)
200331.0 mm (1.2 in)
200449.0 mm (1.9 in)
200569.6 mm (2.7 in)
200645.9 mm (1.8 in)
200783.8 mm (3.3 in)
200856.2 mm (2.2 in)
200955.7 mm (2.2 in)
201064.0 mm (2.5 in)
201157.7 mm (2.3 in)
2012n/a
201348.5 mm (1.9 in)
201471.9 mm (2.8 in)
201587.6 mm (3.4 in)
2016147.9 mm (5.8 in)
201713.2 mm (0.5 in)
201841.2 mm (1.6 in)

Longest dry spell (CDD)

Longest dry spell (CDD) at Harb by year The longest dry spell of the year at Harb, 1951 to 2018. The record is 80 days in 1985, marked on the chart; the median year is 41 days. 020406080196019802000Record: 80 days in 1985
The longest dry spell of the year at Harb, 1951 to 2018. The record is 80 days in 1985, marked on the chart; the median year is 41 days.
Longest dry spell (CDD) at Harb by year
YearLongest dry spell (CDD)
195130 days
195258 days
195330 days
195436 days
195553 days
195674 days
195745 days
195839 days
195939 days
196045 days
196151 days
196239 days
196334 days
196431 days
196553 days
196632 days
196765 days
196869 days
196971 days
197079 days
197134 days
197229 days
197335 days
197438 days
197529 days
197661 days
197736 days
197830 days
197936 days
198028 days
198164 days
198250 days
198341 days
198459 days
198580 days
200033 days
200153 days
200270 days
200355 days
200434 days
200540 days
200645 days
200753 days
200842 days
200975 days
201054 days
201115 days
20121 day
201311 days
201417 days
201530 days
201664 days
201769 days
201830 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.

Rainfall Return Levels

41 years, 1952 to 2010

A day with at least 34.1 mm (1.3 in) of rain is expected about once in 2 years. A day with at least 87.0 mm (3.4 in) of rain is expected about once in 100 years.

Rainfall return levels at Harb: the daily rain expected about once in a given number of years
Expected about once inA day with at leastNote
2 years34.1 mm (1.3 in)
5 years49.0 mm (1.9 in)
10 years58.6 mm (2.3 in)
25 years70.3 mm (2.8 in)
50 years78.8 mm (3.1 in)Longer than the 41 years of record
100 years87.0 mm (3.4 in)Longer than the 41 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, 41 years of values from 1952 to 2010.

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: 89.4 mm (3.5 in) in 1962; 66.0 mm (2.6 in) in 1978; 60.2 mm (2.4 in) in 1964.

Download the Data

  • Data for Harb standing records by year: CSV or JSON. Field meanings are on the data page.
  • Data for Harb 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 2026-10-15 (15 October 2026). Records are computed by this site and are not official.

Data as of . Last revised (2025-12-31).