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Clearwater Weather Records (USC00081632)

Record envelope, standing records and threshold days for Clearwater (USC00081632), Florida, United States, with 47 years of record.

Key Facts for Clearwater

  • Clearwater (USC00081632) is a weather station in Florida, United States at 27.97 latitude and -82.77 longitude, 21 m (69 ft) above sea level.
  • The station reports from 1931 to 1977, 47 years of record.
  • 1,464 records set at Clearwater still stand.
  • Records are tracked for tmax, tmin, prcp: an element needs 30 years of data to be eligible.
  • Clearwater tied a daily record high minimum temperature of 20.6 C (69.1 F) on 21 March 1977.

About the Station

  • Location: Florida, United States, 27.97 latitude, -82.77 longitude.
  • Elevation: 21 m (69 ft).
  • Period of record: 1931 to 1977, 47 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 Clearwater, with 2026 drawn through them The band shows the record high and record low for each calendar day at Clearwater. The lines show the 2026 daily maximum and minimum. 0 days in 2026 matched or passed a record. Temperatures are in degrees Celsius. -10010203040 JanFebMarAprMayJunJulAugSepOctNovDec
The band shows the record high and record low for each calendar day at Clearwater. 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 Clearwater, with 2026 drawn through them
MonthHighest record highLowest record low2026 highest maximum2026 lowest minimum
Jan30.0 C (86.0 F)-4.4 C (24.1 F)n/an/a
Feb30.6 C (87.1 F)-2.8 C (27.0 F)n/an/a
Mar31.7 C (89.1 F)-1.7 C (28.9 F)n/an/a
Apr33.3 C (91.9 F)5.0 C (41.0 F)n/an/a
May36.1 C (97.0 F)11.7 C (53.1 F)n/an/a
Jun36.1 C (97.0 F)15.6 C (60.1 F)n/an/a
Jul35.6 C (96.1 F)16.7 C (62.1 F)n/an/a
Aug35.6 C (96.1 F)18.3 C (64.9 F)n/an/a
Sep35.0 C (95.0 F)16.1 C (61.0 F)n/an/a
Oct34.4 C (93.9 F)7.2 C (45.0 F)n/an/a
Nov31.7 C (89.1 F)-2.8 C (27.0 F)n/an/a
Dec30.6 C (87.1 F)-7.2 C (19.0 F)n/an/a

Which Years Hold Standing Records

1,464 standing records
Standing records at Clearwater by the year they were set 1,464 records at Clearwater still stand. 1937 holds the most, with 60. 02040601931: 281932: 501933: 521934: 441935: 541936: 301937: 601938: 451939: 371940: 431941: 471942: 341943: 391944: 591945: 391946: 221947: 521948: 351949: 251950: 411951: 381952: 251953: 261959: 91960: 461961: 371962: 331963: 221964: 401965: 251966: 181967: 331968: 331969: 281970: 341971: 321972: 271973: 311974: 301975: 241976: 241977: 13193119361941194619511961196619711976
1,464 records at Clearwater still stand. 1937 holds the most, with 60.
Standing records at Clearwater by the year they were set
Year setStanding records
193128
193250
193352
193444
193554
193630
193760
193845
193937
194043
194147
194234
194339
194459
194539
194622
194752
194835
194925
195041
195138
195225
195326
19599
196046
196137
196233
196322
196440
196525
196618
196733
196833
196928
197034
197132
197227
197331
197430
197524
197624
197713

Wettest Day of Each Month

Jul: 272.3 mm (10.7 in)
Record daily precipitation for each month at Clearwater The wettest day on record for each calendar month at Clearwater. The most was 272.3 mm (10.7 in) on 29 July 1960. 0100200300 Jan: 90.7 mm (3.6 in), 12 January 1964 Jan Feb: 94.2 mm (3.7 in), 18 February 1940 Feb Mar: 126.0 mm (5.0 in), 17 March 1960 Mar Apr: 94.0 mm (3.7 in), 7 April 1951 Apr May: 114.3 mm (4.5 in), 15 May 1971 May Jun: 250.7 mm (9.9 in), 23 June 1945 Jun Jul: 272.3 mm (10.7 in), 29 July 1960 Jul Aug: 208.3 mm (8.2 in), 20 August 1932 Aug Sep: 203.7 mm (8.0 in), 5 September 1933 Sep Oct: 138.2 mm (5.4 in), 19 October 1944 Oct Nov: 115.1 mm (4.5 in), 16 November 1951 Nov Dec: 81.5 mm (3.2 in), 27 December 1973 Dec
The wettest day on record for each calendar month at Clearwater. The most was 272.3 mm (10.7 in) on 29 July 1960.
Record daily precipitation for each month at Clearwater
MonthRecord daily precipitation (mm)Date
Jan90.7 mm (3.6 in)12 January 1964
Feb94.2 mm (3.7 in)18 February 1940
Mar126.0 mm (5.0 in)17 March 1960
Apr94.0 mm (3.7 in)7 April 1951
May114.3 mm (4.5 in)15 May 1971
Jun250.7 mm (9.9 in)23 June 1945
Jul272.3 mm (10.7 in)29 July 1960
Aug208.3 mm (8.2 in)20 August 1932
Sep203.7 mm (8.0 in)5 September 1933
Oct138.2 mm (5.4 in)19 October 1944
Nov115.1 mm (4.5 in)16 November 1951
Dec81.5 mm (3.2 in)27 December 1973

Period of Record Coverage

1931 to 1977
Days with data per year at Clearwater 42 years of record at Clearwater, 1931 to 1977. 4 years have data for under 90 percent of days and are left out of rankings: 1931, 1948, 1959, 1977. 1931: 122 of 365 days1932: 365 of 366 days1933: 365 of 365 days1934: 365 of 365 days1935: 365 of 365 days1936: 366 of 366 days1937: 364 of 365 days1938: 364 of 365 days1939: 365 of 365 days1940: 366 of 366 days1941: 364 of 365 days1942: 364 of 365 days1943: 365 of 365 days1944: 366 of 366 days1945: 365 of 365 days1946: 365 of 365 days1947: 361 of 365 days1948: 274 of 366 days1949: 365 of 365 days1950: 363 of 365 days1951: 365 of 365 days1952: 366 of 366 days1953: 365 of 365 days1959: 92 of 365 days1960: 365 of 366 days1961: 364 of 365 days1962: 365 of 365 days1963: 364 of 365 days1964: 364 of 366 days1965: 365 of 365 days1966: 364 of 365 days1967: 365 of 365 days1968: 366 of 366 days1969: 365 of 365 days1970: 364 of 365 days1971: 365 of 365 days1972: 366 of 366 days1973: 361 of 365 days1974: 364 of 365 days1975: 364 of 365 days1976: 351 of 366 days1977: 79 of 365 days1940195019601970
42 years of record at Clearwater, 1931 to 1977. 4 years have data for under 90 percent of days and are left out of rankings: 1931, 1948, 1959, 1977.
Days with data per year at Clearwater
YearDays with dataShare of yearComplete
193112233%No
1932365100%Yes
1933365100%Yes
1934365100%Yes
1935365100%Yes
1936366100%Yes
1937364100%Yes
1938364100%Yes
1939365100%Yes
1940366100%Yes
1941364100%Yes
1942364100%Yes
1943365100%Yes
1944366100%Yes
1945365100%Yes
1946365100%Yes
194736199%Yes
194827475%No
1949365100%Yes
195036399%Yes
1951365100%Yes
1952366100%Yes
1953365100%Yes
19599225%No
1960365100%Yes
1961364100%Yes
1962365100%Yes
1963364100%Yes
196436499%Yes
1965365100%Yes
1966364100%Yes
1967365100%Yes
1968366100%Yes
1969365100%Yes
1970364100%Yes
1971365100%Yes
1972366100%Yes
197336199%Yes
1974364100%Yes
1975364100%Yes
197635196%Yes
19777922%No

Latest Records

20
Latest records at Clearwater
DateStationRecordValueBeat old record byOld record stoodSignificance
21 March 1977Clearwater, USdaily high min (Tie)20.6 C (69.1 F)tie27 years3 of 100 (Routine)
20 March 1977Clearwater, USdaily high max (Tie)29.4 C (84.9 F)tie39 years3 of 100 (Routine)
12 March 1977Clearwater, USdaily high max29.4 C (84.9 F)0.5 C (0.9 F)2 years5 of 100 (Routine)
5 March 1977Clearwater, USdaily high min20.0 C (68.0 F)0.6 C (1.1 F)32 years14 of 100 (Routine)
22 February 1977Clearwater, USdaily low min1.1 C (34.0 F)4.5 C (8.1 F)35 years23 of 100 (Routine)
18 February 1977Clearwater, USdaily low min3.3 C (37.9 F)2.3 C (4.1 F)4 years9 of 100 (Routine)
17 February 1977Clearwater, USdaily low max10.6 C (51.1 F)1.1 C (2.0 F)4 years7 of 100 (Routine)
7 February 1977Clearwater, USdaily low max13.3 C (55.9 F)1.7 C (3.1 F)17 years13 of 100 (Routine)
7 February 1977Clearwater, USdaily low min3.3 C (37.9 F)1.1 C (2.0 F)15 years10 of 100 (Routine)
1 February 1977Clearwater, USdaily low max10.0 C (50.0 F)2.8 C (5.0 F)32 years19 of 100 (Routine)
30 January 1977Clearwater, USdaily low max11.7 C (53.1 F)2.2 C (4.0 F)11 years11 of 100 (Routine)
27 January 1977Clearwater, USdaily rain10.9 mm (0.4 in)7.3 mm (0.29 in)4 years10 of 100 (Routine)
20 January 1977Clearwater, USdaily low min-2.2 C (28.0 F)0.5 C (0.9 F)6 years5 of 100 (Routine)
19 January 1977Clearwater, USdaily low min-2.2 C (28.0 F)1.1 C (2.0 F)1 year6 of 100 (Routine)
18 January 1977Clearwater, USdaily low min-1.1 C (30.0 F)2.2 C (4.0 F)1 year8 of 100 (Routine)
17 January 1977Clearwater, USdaily low min0.6 C (33.1 F)1.6 C (2.9 F)5 years8 of 100 (Routine)
12 January 1977Clearwater, USdaily low min (Tie)1.7 C (35.1 F)tie35 years3 of 100 (Routine)
3 January 1977Clearwater, USdaily rain35.1 mm (1.4 in)8.4 mm (0.33 in)7 years12 of 100 (Routine)
2 January 1977Clearwater, USdaily low max (Tie)12.2 C (54.0 F)tie7 years1 of 100 (Routine)
1 December 1976Clearwater, USdaily low max11.7 C (53.1 F)2.7 C (4.9 F)11 years13 of 100 (Routine)

Climate Trend

38 complete years, 1932 to 1976
Annual mean temperature at Clearwater as warming stripes, 1932 to 1976 One stripe for each of 38 complete years at Clearwater, 1932 to 1976. Blue stripes are years cooler than the station's own mean of 22.5 C (72.6 F); red stripes are warmer. The coolest year was 1976, at 21.6 C (70.9 F), and the warmest was 1946, at 23.6 C (74.4 F). The strongest colour marks a difference of 1.1 C (2.0 F). 1932: 23.3 C, +0.8 C from the station mean1933: 23.2 C, +0.7 C from the station mean1934: 22.9 C, +0.3 C from the station mean1935: 22.9 C, +0.3 C from the station mean1936: 22.8 C, +0.3 C from the station mean1937: 22.7 C, +0.2 C from the station mean1938: 23.0 C, +0.4 C from the station mean1939: 23.2 C, +0.6 C from the station mean1940: 21.9 C, -0.6 C from the station mean1941: 22.7 C, +0.2 C from the station mean1942: 22.0 C, -0.6 C from the station mean1943: 21.8 C, -0.7 C from the station mean1944: 23.0 C, +0.4 C from the station mean1945: 23.2 C, +0.7 C from the station mean1946: 23.6 C, +1.0 C from the station mean1947: 23.0 C, +0.4 C from the station mean1949: 23.4 C, +0.8 C from the station mean1950: 22.7 C, +0.2 C from the station mean1951: 22.8 C, +0.3 C from the station mean1952: 22.5 C, -0.1 C from the station mean1953: 22.8 C, +0.2 C from the station mean1960: 21.7 C, -0.9 C from the station mean1961: 22.3 C, -0.2 C from the station mean1962: 21.9 C, -0.6 C from the station mean1963: 21.7 C, -0.8 C from the station mean1964: 22.2 C, -0.4 C from the station mean1965: 22.4 C, -0.1 C from the station mean1966: 21.8 C, -0.8 C from the station mean1967: 22.5 C, -0.1 C from the station mean1968: 21.7 C, -0.9 C from the station mean1969: 21.8 C, -0.8 C from the station mean1970: 21.9 C, -0.6 C from the station mean1971: 22.6 C, +0.1 C from the station mean1972: 22.9 C, +0.3 C from the station mean1973: 22.4 C, -0.1 C from the station mean1974: 23.0 C, +0.4 C from the station mean1975: 23.1 C, +0.6 C from the station mean1976: 21.6 C, -0.9 C from the station mean1932193519401945195019551960196519701975
One stripe for each of 38 complete years at Clearwater, 1932 to 1976. Blue stripes are years cooler than the station's own mean of 22.5 C (72.6 F); red stripes are warmer. The coolest year was 1976, at 21.6 C (70.9 F), and the warmest was 1946, at 23.6 C (74.4 F). The strongest colour marks a difference of 1.1 C (2.0 F).
Annual mean temperature at Clearwater as warming stripes, 1932 to 1976
YearAnnual mean temperatureDifference from the station mean
193223.3 C+0.76 C
193323.2 C+0.69 C
193422.9 C+0.34 C
193522.9 C+0.33 C
193622.8 C+0.28 C
193722.7 C+0.17 C
193823.0 C+0.44 C
193923.2 C+0.63 C
194021.9 C-0.62 C
194122.7 C+0.20 C
194222.0 C-0.55 C
194321.8 C-0.71 C
194423.0 C+0.42 C
194523.2 C+0.68 C
194623.6 C+1.02 C
194723.0 C+0.44 C
194923.4 C+0.83 C
195022.7 C+0.17 C
195122.8 C+0.26 C
195222.5 C-0.05 C
195322.8 C+0.22 C
196021.7 C-0.86 C
196122.3 C-0.24 C
196221.9 C-0.63 C
196321.7 C-0.84 C
196422.2 C-0.37 C
196522.4 C-0.12 C
196621.8 C-0.76 C
196722.5 C-0.09 C
196821.7 C-0.86 C
196921.8 C-0.79 C
197021.9 C-0.62 C
197122.6 C+0.07 C
197222.9 C+0.31 C
197322.4 C-0.11 C
197423.0 C+0.41 C
197523.1 C+0.57 C
197621.6 C-0.93 C

The annual mean temperature here has fallen by 0.2 C (0.1 to 0.3) per decade over 1932 to 1976. In Fahrenheit: 0.3 F (0.1 to 0.5) 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 Clearwater
MeasurePer decade (C)Per decade (F)PeriodComplete yearsReading
Annual mean temperature-0.2 C (-0.3 to -0.1) per decade-0.3 F (-0.5 to -0.1) per decade1932 to 197638Fall
Mean daily maximum-0.10 C (-0.23 to 0.03) per decade-0.2 F (-0.4 to 0.1) per decade1932 to 197638Not clearly different from zero
Mean daily minimum-0.3 C (-0.4 to -0.1) per decade-0.5 F (-0.7 to -0.3) per decade1932 to 197638Fall

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

1931 to 1977
Yearly extremes at Clearwater: the record and the median year
MeasureRecordYear of the recordMedian yearYears with a value
Hottest day (TXx)36.1 C (97.0 F)193735.0 C (95.0 F)42
Coldest night (TNn)-7.2 C (19.0 F)1962-0.6 C (30.9 F)42
Wettest day (Rx1day)272.3 mm (10.7 in)1960104.1 mm (4.1 in)42
Wettest five days (Rx5day)376.9 mm (14.8 in)1960178.8 mm (7.0 in)42
Longest dry spell (CDD)61 days194030 days42

Hottest day (TXx)

Hottest day (TXx) at Clearwater by year The hottest day of the year at Clearwater, 1931 to 1977. The record is 36.1 C (97.0 F) in 1937, marked on the chart; the median year is 35.0 C (95.0 F). 2830323436381940195019601970Record: 36.1 C (97.0 F) in 1937
The hottest day of the year at Clearwater, 1931 to 1977. The record is 36.1 C (97.0 F) in 1937, marked on the chart; the median year is 35.0 C (95.0 F).
Hottest day (TXx) at Clearwater by year
YearHottest day (TXx)
193134.4 C (93.9 F)
193235.0 C (95.0 F)
193335.0 C (95.0 F)
193435.6 C (96.1 F)
193535.6 C (96.1 F)
193635.0 C (95.0 F)
193736.1 C (97.0 F)
193835.6 C (96.1 F)
193935.0 C (95.0 F)
194034.4 C (93.9 F)
194135.0 C (95.0 F)
194235.6 C (96.1 F)
194333.9 C (93.0 F)
194436.1 C (97.0 F)
194535.6 C (96.1 F)
194634.4 C (93.9 F)
194734.4 C (93.9 F)
194835.0 C (95.0 F)
194934.4 C (93.9 F)
195035.0 C (95.0 F)
195135.0 C (95.0 F)
195235.6 C (96.1 F)
195336.1 C (97.0 F)
195933.9 C (93.0 F)
196035.0 C (95.0 F)
196135.0 C (95.0 F)
196233.9 C (93.0 F)
196334.4 C (93.9 F)
196434.4 C (93.9 F)
196533.3 C (91.9 F)
196634.4 C (93.9 F)
196733.9 C (93.0 F)
196834.4 C (93.9 F)
196935.0 C (95.0 F)
197034.4 C (93.9 F)
197134.4 C (93.9 F)
197234.4 C (93.9 F)
197334.4 C (93.9 F)
197435.0 C (95.0 F)
197534.4 C (93.9 F)
197635.0 C (95.0 F)
197729.4 C (84.9 F)

Coldest night (TNn)

Coldest night (TNn) at Clearwater by year The coldest night of the year at Clearwater, 1931 to 1977. The record is -7.2 C (19.0 F) in 1962, marked on the chart; the median year is -0.6 C (30.9 F). -10-505101940195019601970Record: -7.2 C (19.0 F) in 1962
The coldest night of the year at Clearwater, 1931 to 1977. The record is -7.2 C (19.0 F) in 1962, marked on the chart; the median year is -0.6 C (30.9 F).
Coldest night (TNn) at Clearwater by year
YearColdest night (TNn)
19318.9 C (48.0 F)
19322.8 C (37.0 F)
19333.9 C (39.0 F)
1934-2.8 C (27.0 F)
1935-1.1 C (30.0 F)
1936-0.6 C (30.9 F)
1937-1.1 C (30.0 F)
19381.1 C (34.0 F)
19391.1 C (34.0 F)
1940-3.3 C (26.1 F)
19413.3 C (37.9 F)
1942-1.7 C (28.9 F)
1943-2.8 C (27.0 F)
19440.6 C (33.1 F)
19452.2 C (36.0 F)
19465.0 C (41.0 F)
19470.0 C (32.0 F)
1948-1.1 C (30.0 F)
19495.0 C (41.0 F)
19501.7 C (35.1 F)
19511.7 C (35.1 F)
19522.2 C (36.0 F)
19532.2 C (36.0 F)
1959-1.1 C (30.0 F)
1960-1.1 C (30.0 F)
1961-1.1 C (30.0 F)
1962-7.2 C (19.0 F)
19630.6 C (33.1 F)
1964-2.2 C (28.0 F)
19651.7 C (35.1 F)
1966-4.4 C (24.1 F)
1967-2.8 C (27.0 F)
1968-1.7 C (28.9 F)
19692.2 C (36.0 F)
1970-3.3 C (26.1 F)
1971-2.2 C (28.0 F)
19721.1 C (34.0 F)
1973-0.6 C (30.9 F)
19740.0 C (32.0 F)
1975-1.1 C (30.0 F)
1976-1.1 C (30.0 F)
1977-2.2 C (28.0 F)

Wettest day (Rx1day)

Wettest day (Rx1day) at Clearwater by year The wettest day of the year at Clearwater, 1931 to 1977. The record is 272.3 mm (10.7 in) in 1960, marked on the chart; the median year is 104.1 mm (4.1 in). 01002003001940195019601970Record: 272.3 mm (10.7 in) in 1960
The wettest day of the year at Clearwater, 1931 to 1977. The record is 272.3 mm (10.7 in) in 1960, marked on the chart; the median year is 104.1 mm (4.1 in).
Wettest day (Rx1day) at Clearwater by year
YearWettest day (Rx1day)
193169.6 mm (2.7 in)
1932208.3 mm (8.2 in)
1933203.7 mm (8.0 in)
1934100.3 mm (3.9 in)
1935151.6 mm (6.0 in)
1936191.8 mm (7.6 in)
1937225.6 mm (8.9 in)
193882.0 mm (3.2 in)
1939107.2 mm (4.2 in)
194094.2 mm (3.7 in)
1941105.2 mm (4.1 in)
194265.0 mm (2.6 in)
194380.5 mm (3.2 in)
1944138.2 mm (5.4 in)
1945250.7 mm (9.9 in)
1946105.4 mm (4.1 in)
1947108.0 mm (4.3 in)
194890.9 mm (3.6 in)
1949110.7 mm (4.4 in)
1950190.0 mm (7.5 in)
1951115.1 mm (4.5 in)
195275.7 mm (3.0 in)
195397.0 mm (3.8 in)
195955.9 mm (2.2 in)
1960272.3 mm (10.7 in)
196183.8 mm (3.3 in)
1962120.9 mm (4.8 in)
1963106.9 mm (4.2 in)
1964102.9 mm (4.1 in)
196570.6 mm (2.8 in)
196688.4 mm (3.5 in)
196796.5 mm (3.8 in)
196868.6 mm (2.7 in)
1969124.7 mm (4.9 in)
197057.9 mm (2.3 in)
1971114.3 mm (4.5 in)
197275.2 mm (3.0 in)
197381.5 mm (3.2 in)
1974125.5 mm (4.9 in)
197593.5 mm (3.7 in)
1976111.8 mm (4.4 in)
197735.1 mm (1.4 in)

Wettest five days (Rx5day)

Wettest five days (Rx5day) at Clearwater by year The wettest five days of the year at Clearwater, 1931 to 1977. The record is 376.9 mm (14.8 in) in 1960, marked on the chart; the median year is 178.8 mm (7.0 in). 01002003004001940195019601970Record: 376.9 mm (14.8 in) in 1960
The wettest five days of the year at Clearwater, 1931 to 1977. The record is 376.9 mm (14.8 in) in 1960, marked on the chart; the median year is 178.8 mm (7.0 in).
Wettest five days (Rx5day) at Clearwater by year
YearWettest five days (Rx5day)
1931103.6 mm (4.1 in)
1932254.8 mm (10.0 in)
1933286.8 mm (11.3 in)
1934190.5 mm (7.5 in)
1935232.1 mm (9.1 in)
1936218.2 mm (8.6 in)
1937360.2 mm (14.2 in)
1938184.4 mm (7.3 in)
1939195.7 mm (7.7 in)
1940130.5 mm (5.1 in)
1941199.0 mm (7.8 in)
1942101.1 mm (4.0 in)
1943149.6 mm (5.9 in)
1944154.7 mm (6.1 in)
1945372.3 mm (14.7 in)
1946176.6 mm (7.0 in)
1947199.1 mm (7.8 in)
1948140.8 mm (5.5 in)
1949136.6 mm (5.4 in)
1950357.9 mm (14.1 in)
1951134.6 mm (5.3 in)
1952133.3 mm (5.2 in)
1953168.9 mm (6.6 in)
195971.4 mm (2.8 in)
1960376.9 mm (14.8 in)
1961122.2 mm (4.8 in)
1962208.6 mm (8.2 in)
1963128.2 mm (5.0 in)
1964180.9 mm (7.1 in)
1965192.3 mm (7.6 in)
1966132.3 mm (5.2 in)
1967220.2 mm (8.7 in)
1968159.2 mm (6.3 in)
1969187.7 mm (7.4 in)
1970104.2 mm (4.1 in)
1971210.6 mm (8.3 in)
1972129.4 mm (5.1 in)
1973128.5 mm (5.1 in)
1974376.9 mm (14.8 in)
1975208.9 mm (8.2 in)
1976122.5 mm (4.8 in)
197749.9 mm (2.0 in)

Longest dry spell (CDD)

Longest dry spell (CDD) at Clearwater by year The longest dry spell of the year at Clearwater, 1931 to 1977. The record is 61 days in 1940, marked on the chart; the median year is 30 days. 0204060801940195019601970Record: 61 days in 1940
The longest dry spell of the year at Clearwater, 1931 to 1977. The record is 61 days in 1940, marked on the chart; the median year is 30 days.
Longest dry spell (CDD) at Clearwater by year
YearLongest dry spell (CDD)
193135 days
193220 days
193334 days
193426 days
193539 days
193632 days
193726 days
193843 days
193943 days
194061 days
194138 days
194259 days
194331 days
194421 days
194551 days
194630 days
194735 days
194838 days
194939 days
195053 days
195131 days
195224 days
195321 days
195922 days
196027 days
196122 days
196228 days
196333 days
196430 days
196530 days
196624 days
196748 days
196828 days
196925 days
197041 days
197128 days
197224 days
197319 days
197426 days
197524 days
197625 days
197719 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

38 years, 1932 to 1976

A day with at least 105.8 mm (4.2 in) of rain is expected about once in 2 years. A day with at least 349.7 mm (13.8 in) of rain is expected about once in 100 years.

Rainfall return levels at Clearwater: the daily rain expected about once in a given number of years
Expected about once inA day with at leastNote
2 years105.8 mm (4.2 in)
5 years148.6 mm (5.9 in)
10 years184.3 mm (7.3 in)
25 years239.8 mm (9.4 in)
50 years290.2 mm (11.4 in)Longer than the 38 years of record
100 years349.7 mm (13.8 in)Longer than the 38 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, 38 years of values from 1932 to 1976.

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: 272.3 mm (10.7 in) in 1960; 250.7 mm (9.9 in) in 1945; 225.6 mm (8.9 in) in 1937.

Download the Data

  • Data for Clearwater standing records by year: CSV or JSON. Field meanings are on the data page.
  • Data for Clearwater 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).