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Boromo Weather Records (UV000005516)

Record envelope, standing records and threshold days for Boromo (UV000005516), Burkina Faso, with 36 years of record.

Key Facts for Boromo

  • Boromo (UV000005516) is a weather station in Burkina Faso at 11.73 latitude and -2.92 longitude, 264 m (866 ft) above sea level.
  • The station reports from 1945 to 1980, 36 years of record.
  • 1,464 records set at Boromo still stand.
  • Records are tracked for tmax, tmin, prcp: an element needs 30 years of data to be eligible.
  • Boromo set a daily record low minimum temperature of 11.5 C (52.7 F) on 21 December 1980.

About the Station

  • Location: Burkina Faso, 11.73 latitude, -2.92 longitude.
  • Elevation: 264 m (866 ft).
  • Period of record: 1945 to 1980, 36 years.
  • Eligible elements: tmax, tmin, prcp.

Daily Record Envelope and 2026

0 days at or beyond a record
Daily record high and record low at Boromo, with 2026 drawn through them The band shows the record high and record low for each calendar day at Boromo. The lines show the 2026 daily maximum and minimum. 0 days in 2026 matched or passed a record. Temperatures are in degrees Celsius. 01020304050 JanFebMarAprMayJunJulAugSepOctNovDec
The band shows the record high and record low for each calendar day at Boromo. 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 Boromo, with 2026 drawn through them
MonthHighest record highLowest record low2026 highest maximum2026 lowest minimum
Jan40.0 C (104.0 F)9.4 C (48.9 F)n/an/a
Feb42.2 C (108.0 F)11.2 C (52.2 F)n/an/a
Mar42.5 C (108.5 F)15.4 C (59.7 F)n/an/a
Apr43.4 C (110.1 F)17.8 C (64.0 F)n/an/a
May42.8 C (109.0 F)18.6 C (65.5 F)n/an/a
Jun40.4 C (104.7 F)17.8 C (64.0 F)n/an/a
Jul36.9 C (98.4 F)13.1 C (55.6 F)n/an/a
Aug34.8 C (94.6 F)18.8 C (65.8 F)n/an/a
Sep37.2 C (99.0 F)17.0 C (62.6 F)n/an/a
Oct39.1 C (102.4 F)16.1 C (61.0 F)n/an/a
Nov39.0 C (102.2 F)10.2 C (50.4 F)n/an/a
Dec39.6 C (103.3 F)10.0 C (50.0 F)n/an/a

Which Years Hold Standing Records

1,464 standing records
Standing records at Boromo by the year they were set 1,464 records at Boromo still stand. 1947 holds the most, with 87. 02550751001945: 711946: 621947: 871948: 531949: 631950: 391951: 401952: 371953: 231954: 301955: 341956: 541957: 341958: 621959: 431960: 251961: 351962: 381963: 471964: 331965: 301967: 341968: 381969: 551970: 251971: 301972: 291973: 411974: 371975: 241976: 441977: 471978: 311979: 471980: 42194519491953195719611965197019741978
1,464 records at Boromo still stand. 1947 holds the most, with 87.
Standing records at Boromo by the year they were set
Year setStanding records
194571
194662
194787
194853
194963
195039
195140
195237
195323
195430
195534
195654
195734
195862
195943
196025
196135
196238
196347
196433
196530
196734
196838
196955
197025
197130
197229
197341
197437
197524
197644
197747
197831
197947
198042

All-Time Record Progression

4 new records
When Boromo set new all-time records 4 all-time records were set at Boromo between 22 April 1977 and 23 April 1980. Each dot is a new record. Record high minimum temperatureRecord high maximum temperature22 April 1977: Record high minimum temperature 30.2 C (86.4 F)26 April 1977: Record high minimum temperature 30.3 C (86.5 F)20 March 1979: Record high minimum temperature 30.5 C (86.9 F)23 April 1980: Record high maximum temperature 43.4 C (110.1 F)1980
4 all-time records were set at Boromo between 22 April 1977 and 23 April 1980. Each dot is a new record.
When Boromo set new all-time records
DateKindDetail
1977-04-22Record high minimum temperatureRecord high minimum temperature 30.2 C (86.4 F)
1977-04-26Record high minimum temperatureRecord high minimum temperature 30.3 C (86.5 F)
1979-03-20Record high minimum temperatureRecord high minimum temperature 30.5 C (86.9 F)
1980-04-23Record high maximum temperatureRecord high maximum temperature 43.4 C (110.1 F)

Wettest Day of Each Month

Jul: 132.7 mm (5.2 in)
Record daily precipitation for each month at Boromo The wettest day on record for each calendar month at Boromo. The most was 132.7 mm (5.2 in) on 16 July 1950. 050100150 Jan: 24.2 mm (1.0 in), 3 January 1976 Jan Feb: 9.4 mm (0.37 in), 4 February 1968 Feb Mar: 50.1 mm (2.0 in), 5 March 1976 Mar Apr: 72.6 mm (2.9 in), 24 April 1955 Apr May: 115.9 mm (4.6 in), 28 May 1980 May Jun: 58.0 mm (2.3 in), 7 June 1954 Jun Jul: 132.7 mm (5.2 in), 16 July 1950 Jul Aug: 94.7 mm (3.7 in), 17 August 1967 Aug Sep: 68.9 mm (2.7 in), 30 September 1951 Sep Oct: 53.1 mm (2.1 in), 24 October 1976 Oct Nov: 43.7 mm (1.7 in), 3 November 1968 Nov Dec: 24.1 mm (0.9 in), 5 December 1955 Dec
The wettest day on record for each calendar month at Boromo. The most was 132.7 mm (5.2 in) on 16 July 1950.
Record daily precipitation for each month at Boromo
MonthRecord daily precipitation (mm)Date
Jan24.2 mm (1.0 in)3 January 1976
Feb9.4 mm (0.37 in)4 February 1968
Mar50.1 mm (2.0 in)5 March 1976
Apr72.6 mm (2.9 in)24 April 1955
May115.9 mm (4.6 in)28 May 1980
Jun58.0 mm (2.3 in)7 June 1954
Jul132.7 mm (5.2 in)16 July 1950
Aug94.7 mm (3.7 in)17 August 1967
Sep68.9 mm (2.7 in)30 September 1951
Oct53.1 mm (2.1 in)24 October 1976
Nov43.7 mm (1.7 in)3 November 1968
Dec24.1 mm (0.9 in)5 December 1955

Period of Record Coverage

1945 to 1980
Days with data per year at Boromo 35 years of record at Boromo, 1945 to 1980. Every year has data for at least 90 percent of its days. 1945: 365 of 365 days1946: 351 of 365 days1947: 365 of 365 days1948: 366 of 366 days1949: 359 of 365 days1950: 364 of 365 days1951: 365 of 365 days1952: 354 of 366 days1953: 359 of 365 days1954: 364 of 365 days1955: 364 of 365 days1956: 366 of 366 days1957: 365 of 365 days1958: 357 of 365 days1959: 365 of 365 days1960: 365 of 366 days1961: 365 of 365 days1962: 365 of 365 days1963: 364 of 365 days1964: 365 of 366 days1965: 365 of 365 days1967: 364 of 365 days1968: 366 of 366 days1969: 364 of 365 days1970: 365 of 365 days1971: 364 of 365 days1972: 366 of 366 days1973: 365 of 365 days1974: 365 of 365 days1975: 365 of 365 days1976: 364 of 366 days1977: 353 of 365 days1978: 365 of 365 days1979: 349 of 365 days1980: 345 of 366 days19451950195519601965197019751980
35 years of record at Boromo, 1945 to 1980. Every year has data for at least 90 percent of its days.
Days with data per year at Boromo
YearDays with dataShare of yearComplete
1945365100%Yes
194635196%Yes
1947365100%Yes
1948366100%Yes
194935998%Yes
1950364100%Yes
1951365100%Yes
195235497%Yes
195335998%Yes
1954364100%Yes
1955364100%Yes
1956366100%Yes
1957365100%Yes
195835798%Yes
1959365100%Yes
1960365100%Yes
1961365100%Yes
1962365100%Yes
1963364100%Yes
1964365100%Yes
1965365100%Yes
1967364100%Yes
1968366100%Yes
1969364100%Yes
1970365100%Yes
1971364100%Yes
1972366100%Yes
1973365100%Yes
1974365100%Yes
1975365100%Yes
197636499%Yes
197735397%Yes
1978365100%Yes
197934996%Yes
198034594%Yes

Latest Records

20
Latest records at Boromo
DateStationRecordValueBeat old record byOld record stoodSignificance
21 December 1980Boromo, BFdaily low min11.5 C (52.7 F)0.5 C (0.9 F)35 years15 of 100 (Routine)
20 December 1980Boromo, BFdaily low max27.3 C (81.1 F)3.7 C (6.7 F)15 years24 of 100 (Routine)
20 December 1980Boromo, BFdaily low min10.3 C (50.5 F)2.6 C (4.7 F)35 years24 of 100 (Routine)
19 December 1980Boromo, BFdaily low max25.6 C (78.1 F)4.6 C (8.3 F)18 years29 of 100 (Routine)
13 December 1980Boromo, BFdaily high min21.8 C (71.2 F)0.8 C (1.4 F)9 years8 of 100 (Routine)
11 December 1980Boromo, BFdaily high min21.8 C (71.2 F)2.6 C (4.7 F)12 years17 of 100 (Routine)
7 November 1980Boromo, BFdaily high max38.2 C (100.8 F)0.2 C (0.4 F)21 years10 of 100 (Routine)
2 November 1980Boromo, BFdaily high min24.1 C (75.4 F)0.3 C (0.5 F)22 years10 of 100 (Routine)
30 October 1980Boromo, BFdaily high min23.4 C (74.1 F)0.2 C (0.4 F)31 years13 of 100 (Routine)
23 October 1980Boromo, BFdaily rain6.9 mm (0.27 in)0.4 mm (0.02 in)26 years10 of 100 (Routine)
21 October 1980Boromo, BFdaily high min (Tie)23.6 C (74.5 F)tie12 years1 of 100 (Routine)
20 October 1980Boromo, BFdaily high min24.0 C (75.2 F)0.7 C (1.3 F)9 years10 of 100 (Routine)
16 October 1980Boromo, BFdaily rain8.1 mm (0.32 in)5.6 mm (0.22 in)13 years12 of 100 (Routine)
1 October 1980Boromo, BFdaily high max (Tie)36.6 C (97.9 F)tie19 years2 of 100 (Routine)
30 September 1980Boromo, BFdaily high max36.3 C (97.3 F)0.1 C (0.2 F)19 years8 of 100 (Routine)
25 September 1980Boromo, BFdaily high max35.2 C (95.4 F)0.1 C (0.2 F)33 years12 of 100 (Routine)
24 September 1980Boromo, BFdaily high max36.2 C (97.2 F)0.4 C (0.7 F)8 years6 of 100 (Routine)
23 September 1980Boromo, BFdaily high max (Tie)34.2 C (93.6 F)tie35 years3 of 100 (Routine)
21 September 1980Boromo, BFdaily high max36.4 C (97.5 F)2.0 C (3.6 F)31 years20 of 100 (Routine)
21 September 1980Boromo, BFdaily high min24.2 C (75.6 F)0.6 C (1.1 F)7 years10 of 100 (Routine)

Climate Trend

34 complete years, 1945 to 1980
Annual mean temperature at Boromo as warming stripes, 1945 to 1980 One stripe for each of 34 complete years at Boromo, 1945 to 1980. Blue stripes are years cooler than the station's own mean of 28.0 C (82.4 F); red stripes are warmer. The coolest year was 1965, at 27.4 C (81.3 F), and the warmest was 1958, at 28.8 C (83.8 F). The strongest colour marks a difference of 0.9 C (1.6 F). 1945: 28.0 C, 0.0 C from the station mean1947: 28.8 C, +0.8 C from the station mean1948: 28.2 C, +0.2 C from the station mean1949: 28.6 C, +0.6 C from the station mean1950: 27.9 C, -0.1 C from the station mean1951: 27.9 C, -0.1 C from the station mean1952: 27.8 C, -0.1 C from the station mean1953: 28.1 C, +0.1 C from the station mean1954: 27.9 C, -0.1 C from the station mean1955: 27.7 C, -0.3 C from the station mean1956: 27.9 C, -0.1 C from the station mean1957: 27.9 C, -0.1 C from the station mean1958: 28.8 C, +0.8 C from the station mean1959: 28.5 C, +0.5 C from the station mean1960: 27.9 C, -0.1 C from the station mean1961: 27.7 C, -0.3 C from the station mean1962: 27.6 C, -0.4 C from the station mean1963: 27.9 C, -0.1 C from the station mean1964: 27.7 C, -0.3 C from the station mean1965: 27.4 C, -0.6 C from the station mean1967: 27.7 C, -0.3 C from the station mean1968: 27.7 C, -0.3 C from the station mean1969: 28.4 C, +0.4 C from the station mean1970: 28.0 C, 0.0 C from the station mean1971: 27.7 C, -0.2 C from the station mean1972: 27.9 C, -0.1 C from the station mean1973: 28.3 C, +0.4 C from the station mean1974: 27.8 C, -0.2 C from the station mean1975: 27.6 C, -0.4 C from the station mean1976: 27.4 C, -0.6 C from the station mean1977: 28.0 C, 0.0 C from the station mean1978: 28.2 C, +0.2 C from the station mean1979: 28.2 C, +0.2 C from the station mean1980: 28.5 C, +0.5 C from the station mean19451950195519601965197019751980
One stripe for each of 34 complete years at Boromo, 1945 to 1980. Blue stripes are years cooler than the station's own mean of 28.0 C (82.4 F); red stripes are warmer. The coolest year was 1965, at 27.4 C (81.3 F), and the warmest was 1958, at 28.8 C (83.8 F). The strongest colour marks a difference of 0.9 C (1.6 F).
Annual mean temperature at Boromo as warming stripes, 1945 to 1980
YearAnnual mean temperatureDifference from the station mean
194528.0 C+0.02 C
194728.8 C+0.80 C
194828.2 C+0.21 C
194928.6 C+0.62 C
195027.9 C-0.13 C
195127.9 C-0.13 C
195227.8 C-0.14 C
195328.1 C+0.08 C
195427.9 C-0.12 C
195527.7 C-0.30 C
195627.9 C-0.11 C
195727.9 C-0.09 C
195828.8 C+0.82 C
195928.5 C+0.55 C
196027.9 C-0.10 C
196127.7 C-0.27 C
196227.6 C-0.35 C
196327.9 C-0.09 C
196427.7 C-0.26 C
196527.4 C-0.60 C
196727.7 C-0.26 C
196827.7 C-0.25 C
196928.4 C+0.39 C
197028.0 C+0.05 C
197127.7 C-0.24 C
197227.9 C-0.13 C
197328.3 C+0.36 C
197427.8 C-0.22 C
197527.6 C-0.38 C
197627.4 C-0.60 C
197728.0 C+0.03 C
197828.2 C+0.23 C
197928.2 C+0.23 C
198028.5 C+0.52 C

The fitted trend in annual mean temperature here over 1945 to 1980 is -0.1 C (-0.2 to 0.1) per decade. The interval includes zero, so the trend is not clearly different from zero. In Fahrenheit: -0.1 F (-0.3 to 0.1) per decade. The slope is a straight line fitted to 34 complete years; the brackets give its 95 percent interval.

Fitted temperature trends per decade at Boromo
MeasurePer decade (C)Per decade (F)PeriodComplete yearsReading
Annual mean temperature-0.1 C (-0.2 to 0.1) per decade-0.1 F (-0.3 to 0.1) per decade1945 to 198034Not clearly different from zero
Mean daily maximum-0.2 C (-0.4 to -0.1) per decade-0.4 F (-0.7 to -0.2) per decade1945 to 198034Fall
Mean daily minimum0.12 C (0.00 to 0.25) per decade0.22 F (-0.01 to 0.44) per decade1945 to 198034Not 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

1945 to 1980
Yearly extremes at Boromo: the record and the median year
MeasureRecordYear of the recordMedian yearYears with a value
Hottest day (TXx)43.4 C (110.1 F)198042.0 C (107.6 F)35
Coldest night (TNn)9.4 C (48.9 F)195711.9 C (53.4 F)35
Wettest day (Rx1day)132.7 mm (5.2 in)195064.3 mm (2.5 in)35
Wettest five days (Rx5day)171.0 mm (6.7 in)1953114.1 mm (4.5 in)35
Longest dry spell (CDD)125 days196582 days35

Hottest day (TXx)

Hottest day (TXx) at Boromo by year The hottest day of the year at Boromo, 1945 to 1980. The record is 43.4 C (110.1 F) in 1980, marked on the chart; the median year is 42.0 C (107.6 F). 414243441950196019701980Record: 43.4 C (110.1 F) in 1980
The hottest day of the year at Boromo, 1945 to 1980. The record is 43.4 C (110.1 F) in 1980, marked on the chart; the median year is 42.0 C (107.6 F).
Hottest day (TXx) at Boromo by year
YearHottest day (TXx)
194542.7 C (108.9 F)
194643.1 C (109.6 F)
194742.1 C (107.8 F)
194842.5 C (108.5 F)
194943.2 C (109.8 F)
195042.6 C (108.7 F)
195141.9 C (107.4 F)
195242.3 C (108.1 F)
195341.7 C (107.1 F)
195441.5 C (106.7 F)
195541.6 C (106.9 F)
195642.0 C (107.6 F)
195741.8 C (107.2 F)
195843.0 C (109.4 F)
195942.8 C (109.0 F)
196042.2 C (108.0 F)
196141.8 C (107.2 F)
196241.8 C (107.2 F)
196342.1 C (107.8 F)
196442.3 C (108.1 F)
196541.4 C (106.5 F)
196742.0 C (107.6 F)
196842.0 C (107.6 F)
196943.0 C (109.4 F)
197041.6 C (106.9 F)
197141.4 C (106.5 F)
197241.0 C (105.8 F)
197342.0 C (107.6 F)
197441.0 C (105.8 F)
197541.3 C (106.3 F)
197641.4 C (106.5 F)
197741.6 C (106.9 F)
197841.5 C (106.7 F)
197942.0 C (107.6 F)
198043.4 C (110.1 F)

Coldest night (TNn)

Coldest night (TNn) at Boromo by year The coldest night of the year at Boromo, 1945 to 1980. The record is 9.4 C (48.9 F) in 1957, marked on the chart; the median year is 11.9 C (53.4 F). 81012141950196019701980Record: 9.4 C (48.9 F) in 1957
The coldest night of the year at Boromo, 1945 to 1980. The record is 9.4 C (48.9 F) in 1957, marked on the chart; the median year is 11.9 C (53.4 F).
Coldest night (TNn) at Boromo by year
YearColdest night (TNn)
194510.0 C (50.0 F)
194612.0 C (53.6 F)
194711.1 C (52.0 F)
194811.4 C (52.5 F)
194911.9 C (53.4 F)
195012.5 C (54.5 F)
195111.6 C (52.9 F)
195211.2 C (52.2 F)
195311.6 C (52.9 F)
195412.0 C (53.6 F)
195511.6 C (52.9 F)
195611.5 C (52.7 F)
19579.4 C (48.9 F)
195813.0 C (55.4 F)
195912.4 C (54.3 F)
196010.0 C (50.0 F)
196110.6 C (51.1 F)
196212.6 C (54.7 F)
196311.7 C (53.1 F)
196413.5 C (56.3 F)
196512.6 C (54.7 F)
196713.0 C (55.4 F)
196813.0 C (55.4 F)
196910.2 C (50.4 F)
197013.1 C (55.6 F)
197111.6 C (52.9 F)
197213.4 C (56.1 F)
197312.9 C (55.2 F)
197412.3 C (54.1 F)
197511.8 C (53.2 F)
197612.9 C (55.2 F)
197710.8 C (51.4 F)
197813.9 C (57.0 F)
197912.2 C (54.0 F)
198010.3 C (50.5 F)

Wettest day (Rx1day)

Wettest day (Rx1day) at Boromo by year The wettest day of the year at Boromo, 1945 to 1980. The record is 132.7 mm (5.2 in) in 1950, marked on the chart; the median year is 64.3 mm (2.5 in). 2550751001251501950196019701980Record: 132.7 mm (5.2 in) in 1950
The wettest day of the year at Boromo, 1945 to 1980. The record is 132.7 mm (5.2 in) in 1950, marked on the chart; the median year is 64.3 mm (2.5 in).
Wettest day (Rx1day) at Boromo by year
YearWettest day (Rx1day)
194553.1 mm (2.1 in)
1946103.0 mm (4.1 in)
194775.6 mm (3.0 in)
194853.6 mm (2.1 in)
194967.8 mm (2.7 in)
1950132.7 mm (5.2 in)
195168.9 mm (2.7 in)
195261.0 mm (2.4 in)
195381.0 mm (3.2 in)
195464.3 mm (2.5 in)
195572.6 mm (2.9 in)
195647.4 mm (1.9 in)
195762.7 mm (2.5 in)
195868.3 mm (2.7 in)
195955.6 mm (2.2 in)
196070.3 mm (2.8 in)
196148.0 mm (1.9 in)
196246.5 mm (1.8 in)
196355.8 mm (2.2 in)
196479.7 mm (3.1 in)
196574.3 mm (2.9 in)
196794.7 mm (3.7 in)
196849.3 mm (1.9 in)
196958.2 mm (2.3 in)
197068.4 mm (2.7 in)
197183.6 mm (3.3 in)
197281.1 mm (3.2 in)
197340.4 mm (1.6 in)
197461.8 mm (2.4 in)
197571.5 mm (2.8 in)
197653.1 mm (2.1 in)
197759.8 mm (2.4 in)
197857.9 mm (2.3 in)
197951.8 mm (2.0 in)
1980115.9 mm (4.6 in)

Wettest five days (Rx5day)

Wettest five days (Rx5day) at Boromo by year The wettest five days of the year at Boromo, 1945 to 1980. The record is 171.0 mm (6.7 in) in 1953, marked on the chart; the median year is 114.1 mm (4.5 in). 50751001251501751950196019701980Record: 171.0 mm (6.7 in) in 1953
The wettest five days of the year at Boromo, 1945 to 1980. The record is 171.0 mm (6.7 in) in 1953, marked on the chart; the median year is 114.1 mm (4.5 in).
Wettest five days (Rx5day) at Boromo by year
YearWettest five days (Rx5day)
1945105.3 mm (4.1 in)
1946142.6 mm (5.6 in)
1947161.0 mm (6.3 in)
194898.7 mm (3.9 in)
1949146.2 mm (5.8 in)
1950153.8 mm (6.1 in)
1951122.9 mm (4.8 in)
1952114.6 mm (4.5 in)
1953171.0 mm (6.7 in)
1954104.0 mm (4.1 in)
1955137.5 mm (5.4 in)
195693.5 mm (3.7 in)
195790.6 mm (3.6 in)
1958108.7 mm (4.3 in)
1959100.3 mm (3.9 in)
1960115.5 mm (4.5 in)
196171.6 mm (2.8 in)
1962109.8 mm (4.3 in)
196386.4 mm (3.4 in)
1964165.2 mm (6.5 in)
1965156.8 mm (6.2 in)
1967128.4 mm (5.1 in)
196895.8 mm (3.8 in)
1969102.6 mm (4.0 in)
1970115.9 mm (4.6 in)
1971124.6 mm (4.9 in)
1972152.9 mm (6.0 in)
1973103.9 mm (4.1 in)
197486.8 mm (3.4 in)
1975165.8 mm (6.5 in)
1976114.1 mm (4.5 in)
197784.7 mm (3.3 in)
1978102.9 mm (4.1 in)
1979105.6 mm (4.2 in)
1980135.7 mm (5.3 in)

Longest dry spell (CDD)

Longest dry spell (CDD) at Boromo by year The longest dry spell of the year at Boromo, 1945 to 1980. The record is 125 days in 1965, marked on the chart; the median year is 82 days. 2550751001251950196019701980Record: 125 days in 1965
The longest dry spell of the year at Boromo, 1945 to 1980. The record is 125 days in 1965, marked on the chart; the median year is 82 days.
Longest dry spell (CDD) at Boromo by year
YearLongest dry spell (CDD)
1945114 days
194671 days
1947118 days
194897 days
194958 days
195082 days
195160 days
1952100 days
1953107 days
195483 days
195556 days
195687 days
195786 days
195881 days
1959116 days
196081 days
1961100 days
1962105 days
196381 days
196485 days
1965125 days
196777 days
196834 days
196961 days
197070 days
197171 days
197294 days
197364 days
1974103 days
197578 days
197662 days
1977107 days
197868 days
197974 days
198094 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

35 years, 1945 to 1980

A day with at least 63.7 mm (2.5 in) of rain is expected about once in 2 years. A day with at least 141.9 mm (5.6 in) of rain is expected about once in 100 years.

Rainfall return levels at Boromo: the daily rain expected about once in a given number of years
Expected about once inA day with at leastNote
2 years63.7 mm (2.5 in)
5 years80.5 mm (3.2 in)
10 years93.2 mm (3.7 in)
25 years111.0 mm (4.4 in)
50 years125.8 mm (5.0 in)Longer than the 35 years of record
100 years141.9 mm (5.6 in)Longer than the 35 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, 35 years of values from 1945 to 1980.

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: 132.7 mm (5.2 in) in 1950; 115.9 mm (4.6 in) in 1980; 103.0 mm (4.1 in) in 1946.

Download the Data

  • Data for Boromo standing records by year: CSV or JSON. Field meanings are on the data page.
  • Data for Boromo 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 2026-10-17 (17 October 2026). Records are computed by this site and are not official.

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