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Rainbow Rsvr Tomahawk Weather Records (USC00476939)

Record envelope, standing records and threshold days for Rainbow Rsvr Tomahawk (USC00476939), Wisconsin, United States, with 51 years of record.

Key Facts for Rainbow Rsvr Tomahawk

  • Rainbow Rsvr Tomahawk (USC00476939) is a weather station in Wisconsin, United States at 45.83 latitude and -89.55 longitude, 488 m (1,600 ft) above sea level.
  • The station reports from 1946 to 1996, 51 years of record.
  • 1,464 records set at Rainbow Rsvr Tomahawk still stand.
  • Records are tracked for tmax, tmin, prcp, snow, snwd: an element needs 30 years of data to be eligible.
  • Rainbow Rsvr Tomahawk set a daily record precipitation of 15.7 mm (0.6 in) on 20 August 1996.

About the Station

  • Location: Wisconsin, United States, 45.83 latitude, -89.55 longitude.
  • Elevation: 488 m (1,600 ft).
  • Period of record: 1946 to 1996, 51 years.
  • Eligible elements: tmax, tmin, prcp, snow, snwd.

Daily Record Envelope and 2026

0 days at or beyond a record
Daily record high and record low at Rainbow Rsvr Tomahawk, with 2026 drawn through them The band shows the record high and record low for each calendar day at Rainbow Rsvr Tomahawk. The lines show the 2026 daily maximum and minimum. 0 days in 2026 matched or passed a record. Temperatures are in degrees Celsius. -60-40-2002040 JanFebMarAprMayJunJulAugSepOctNovDec
The band shows the record high and record low for each calendar day at Rainbow Rsvr Tomahawk. 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 Rainbow Rsvr Tomahawk, with 2026 drawn through them
MonthHighest record highLowest record low2026 highest maximum2026 lowest minimum
Jan12.2 C (54.0 F)-41.1 C (-42.0 F)n/an/a
Feb14.4 C (57.9 F)-41.1 C (-42.0 F)n/an/a
Mar21.1 C (70.0 F)-40.0 C (-40.0 F)n/an/a
Apr32.2 C (90.0 F)-22.8 C (-9.0 F)n/an/a
May32.2 C (90.0 F)-8.3 C (17.1 F)n/an/a
Jun36.1 C (97.0 F)-3.3 C (26.1 F)n/an/a
Jul35.6 C (96.1 F)0.6 C (33.1 F)n/an/a
Aug37.2 C (99.0 F)0.0 C (32.0 F)n/an/a
Sep34.4 C (93.9 F)-7.2 C (19.0 F)n/an/a
Oct30.6 C (87.1 F)-12.8 C (9.0 F)n/an/a
Nov25.6 C (78.1 F)-26.7 C (-16.1 F)n/an/a
Dec15.0 C (59.0 F)-34.4 C (-29.9 F)n/an/a

Which Years Hold Standing Records

1,464 standing records
Standing records at Rainbow Rsvr Tomahawk by the year they were set 1,464 records at Rainbow Rsvr Tomahawk still stand. 1964 holds the most, with 56. 02040601946: 111947: 521948: 251949: 311950: 401951: 321952: 301953: 331954: 281955: 321956: 361957: 121958: 231959: 301960: 261961: 181962: 271963: 421964: 561965: 391966: 261967: 291968: 291969: 211970: 221971: 211972: 291973: 201974: 271975: 191976: 491977: 411978: 221979: 301980: 191981: 181982: 301983: 371984: 271985: 211986: 251987: 361988: 371989: 321990: 241991: 301992: 251993: 211994: 341995: 251996: 15194619521958196419701976198219881994
1,464 records at Rainbow Rsvr Tomahawk still stand. 1964 holds the most, with 56.
Standing records at Rainbow Rsvr Tomahawk by the year they were set
Year setStanding records
194611
194752
194825
194931
195040
195132
195230
195333
195428
195532
195636
195712
195823
195930
196026
196118
196227
196342
196456
196539
196626
196729
196829
196921
197022
197121
197229
197320
197427
197519
197649
197741
197822
197930
198019
198118
198230
198337
198427
198521
198625
198736
198837
198932
199024
199130
199225
199321
199434
199525
199615

All-Time Record Progression

3 new records
When Rainbow Rsvr Tomahawk set new all-time records 3 all-time records were set at Rainbow Rsvr Tomahawk between 5 March 1979 and 17 January 1982. Each dot is a new record. Record snow depthRecord daily precipitationRecord low maximum temperature5 March 1979: Record snow depth 86.4 cm (34.0 in)14 June 1981: Record daily precipitation 192.0 mm (7.6 in)17 January 1982: Record low maximum temperature -29.4 C (-20.9 F)1980
3 all-time records were set at Rainbow Rsvr Tomahawk between 5 March 1979 and 17 January 1982. Each dot is a new record.
When Rainbow Rsvr Tomahawk set new all-time records
DateKindDetail
1979-03-05Record snow depthRecord snow depth 86.4 cm (34.0 in)
1981-06-14Record daily precipitationRecord daily precipitation 192.0 mm (7.6 in)
1982-01-17Record low maximum temperatureRecord low maximum temperature -29.4 C (-20.9 F)

Wettest Day of Each Month

Jun: 192.0 mm (7.6 in)
Record daily precipitation for each month at Rainbow Rsvr Tomahawk The wettest day on record for each calendar month at Rainbow Rsvr Tomahawk. The most was 192.0 mm (7.6 in) on 14 June 1981. 050100150200 Jan: 25.9 mm (1.0 in), 25 January 1967 Jan Feb: 24.6 mm (1.0 in), 5 February 1971 Feb Mar: 38.1 mm (1.5 in), 7 March 1973 Mar Apr: 43.7 mm (1.7 in), 6 April 1947 Apr May: 62.2 mm (2.4 in), 16 May 1965 May Jun: 192.0 mm (7.6 in), 14 June 1981 Jun Jul: 99.1 mm (3.9 in), 1 July 1958 Jul Aug: 86.4 mm (3.4 in), 16 August 1972 Aug Sep: 74.7 mm (2.9 in), 20 September 1983 Sep Oct: 78.0 mm (3.1 in), 15 October 1966 Oct Nov: 58.9 mm (2.3 in), 16 November 1950 Nov Dec: 24.1 mm (0.9 in), 28 December 1946 Dec
The wettest day on record for each calendar month at Rainbow Rsvr Tomahawk. The most was 192.0 mm (7.6 in) on 14 June 1981.
Record daily precipitation for each month at Rainbow Rsvr Tomahawk
MonthRecord daily precipitation (mm)Date
Jan25.9 mm (1.0 in)25 January 1967
Feb24.6 mm (1.0 in)5 February 1971
Mar38.1 mm (1.5 in)7 March 1973
Apr43.7 mm (1.7 in)6 April 1947
May62.2 mm (2.4 in)16 May 1965
Jun192.0 mm (7.6 in)14 June 1981
Jul99.1 mm (3.9 in)1 July 1958
Aug86.4 mm (3.4 in)16 August 1972
Sep74.7 mm (2.9 in)20 September 1983
Oct78.0 mm (3.1 in)15 October 1966
Nov58.9 mm (2.3 in)16 November 1950
Dec24.1 mm (0.9 in)28 December 1946

Period of Record Coverage

1946 to 1996
Days with data per year at Rainbow Rsvr Tomahawk 51 years of record at Rainbow Rsvr Tomahawk, 1946 to 1996. 3 years have data for under 90 percent of days and are left out of rankings: 1946, 1948, 1996. 1946: 117 of 365 days1947: 344 of 365 days1948: 214 of 366 days1949: 365 of 365 days1950: 365 of 365 days1951: 363 of 365 days1952: 366 of 366 days1953: 365 of 365 days1954: 365 of 365 days1955: 365 of 365 days1956: 366 of 366 days1957: 365 of 365 days1958: 365 of 365 days1959: 360 of 365 days1960: 366 of 366 days1961: 365 of 365 days1962: 365 of 365 days1963: 365 of 365 days1964: 366 of 366 days1965: 365 of 365 days1966: 365 of 365 days1967: 365 of 365 days1968: 365 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: 366 of 366 days1977: 364 of 365 days1978: 365 of 365 days1979: 365 of 365 days1980: 366 of 366 days1981: 365 of 365 days1982: 333 of 365 days1983: 365 of 365 days1984: 366 of 366 days1985: 365 of 365 days1986: 365 of 365 days1987: 365 of 365 days1988: 365 of 366 days1989: 363 of 365 days1990: 365 of 365 days1991: 365 of 365 days1992: 366 of 366 days1993: 365 of 365 days1994: 365 of 365 days1995: 365 of 365 days1996: 274 of 366 days19501960197019801990
51 years of record at Rainbow Rsvr Tomahawk, 1946 to 1996. 3 years have data for under 90 percent of days and are left out of rankings: 1946, 1948, 1996.
Days with data per year at Rainbow Rsvr Tomahawk
YearDays with dataShare of yearComplete
194611732%No
194734494%Yes
194821458%No
1949365100%Yes
1950365100%Yes
195136399%Yes
1952366100%Yes
1953365100%Yes
1954365100%Yes
1955365100%Yes
1956366100%Yes
1957365100%Yes
1958365100%Yes
195936099%Yes
1960366100%Yes
1961365100%Yes
1962365100%Yes
1963365100%Yes
1964366100%Yes
1965365100%Yes
1966365100%Yes
1967365100%Yes
1968365100%Yes
1969364100%Yes
1970365100%Yes
1971364100%Yes
1972366100%Yes
1973365100%Yes
1974365100%Yes
1975365100%Yes
1976366100%Yes
1977364100%Yes
1978365100%Yes
1979365100%Yes
1980366100%Yes
1981365100%Yes
198233391%Yes
1983365100%Yes
1984366100%Yes
1985365100%Yes
1986365100%Yes
1987365100%Yes
1988365100%Yes
198936399%Yes
1990365100%Yes
1991365100%Yes
1992366100%Yes
1993365100%Yes
1994365100%Yes
1995365100%Yes
199627475%No

Latest Records

20
Latest records at Rainbow Rsvr Tomahawk
DateStationRecordValueBeat old record byOld record stoodSignificance
20 August 1996Rainbow Rsvr Tomahawk, USdaily rain15.7 mm (0.6 in)5.8 mm (0.23 in)7 years11 of 100 (Routine)
16 August 1996Rainbow Rsvr Tomahawk, USdaily low max18.9 C (66.0 F)0.5 C (0.9 F)15 years10 of 100 (Routine)
7 August 1996Rainbow Rsvr Tomahawk, USdaily high min18.3 C (64.9 F)0.5 C (0.9 F)12 years9 of 100 (Routine)
6 August 1996Rainbow Rsvr Tomahawk, USdaily rain41.4 mm (1.6 in)18.5 mm (0.7 in)30 years28 of 100 (Routine)
31 July 1996Rainbow Rsvr Tomahawk, USdaily low max15.0 C (59.0 F)2.2 C (4.0 F)22 years17 of 100 (Routine)
30 July 1996Rainbow Rsvr Tomahawk, USdaily low max (Tie)15.6 C (60.1 F)tie7 years1 of 100 (Routine)
18 July 1996Rainbow Rsvr Tomahawk, USdaily rain39.6 mm (1.6 in)1.5 mm (0.06 in)28 years14 of 100 (Routine)
9 July 1996Rainbow Rsvr Tomahawk, USdaily low max19.4 C (66.9 F)0.6 C (1.1 F)43 years18 of 100 (Routine)
7 July 1996Rainbow Rsvr Tomahawk, USdaily rain15.5 mm (0.6 in)2.0 mm (0.08 in)25 years13 of 100 (Routine)
5 June 1996Rainbow Rsvr Tomahawk, USdaily low max13.3 C (55.9 F)2.3 C (4.1 F)27 years18 of 100 (Routine)
12 May 1996Rainbow Rsvr Tomahawk, USdaily low max10.0 C (50.0 F)1.1 C (2.0 F)17 years11 of 100 (Routine)
8 May 1996Rainbow Rsvr Tomahawk, USdaily snow depth2.5 cm (1.0 in)2.5 cm (1.0 in)47 years20 of 100 (Routine)
7 May 1996Rainbow Rsvr Tomahawk, USdaily snow depth2.5 cm (1.0 in)2.5 cm (1.0 in)47 years20 of 100 (Routine)
5 May 1996Rainbow Rsvr Tomahawk, USdaily snow depth5.1 cm (2.0 in)5.1 cm (2.0 in)47 years20 of 100 (Routine)
4 May 1996Rainbow Rsvr Tomahawk, USdaily snow depth5.1 cm (2.0 in)5.1 cm (2.0 in)47 years20 of 100 (Routine)
3 May 1996Rainbow Rsvr Tomahawk, USdaily snow depth5.1 cm (2.0 in)5.1 cm (2.0 in)47 years20 of 100 (Routine)
2 May 1996Rainbow Rsvr Tomahawk, USdaily low min-7.2 C (19.0 F)0.5 C (0.9 F)6 years6 of 100 (Routine)
2 May 1996Rainbow Rsvr Tomahawk, USmonthly snow depth (Tie)10.2 cm (4.0 in)tie16 years4 of 100 (Routine)
1 May 1996Rainbow Rsvr Tomahawk, USmonthly snow depth (Tie)10.2 cm (4.0 in)tie16 years4 of 100 (Routine)
30 April 1996Rainbow Rsvr Tomahawk, USdaily snowfall16.5 cm (6.5 in)16.2 cm (6.4 in)7 years46 of 100 (Notable)

Climate Trend

47 complete years, 1947 to 1995
Annual mean temperature at Rainbow Rsvr Tomahawk as warming stripes, 1947 to 1995 One stripe for each of 47 complete years at Rainbow Rsvr Tomahawk, 1947 to 1995. Blue stripes are years cooler than the station's own mean of 4.3 C (39.7 F); red stripes are warmer. The coolest year was 1979, at 2.5 C (36.5 F), and the warmest was 1987, at 5.9 C (42.5 F). The strongest colour marks a difference of 1.8 C (3.2 F). 1947: 4.7 C, +0.5 C from the station mean1949: 5.6 C, +1.4 C from the station mean1950: 3.1 C, -1.2 C from the station mean1951: 3.5 C, -0.7 C from the station mean1952: 5.2 C, +0.9 C from the station mean1953: 5.7 C, +1.4 C from the station mean1954: 5.1 C, +0.8 C from the station mean1955: 5.1 C, +0.8 C from the station mean1956: 4.7 C, +0.4 C from the station mean1957: 4.7 C, +0.4 C from the station mean1958: 4.6 C, +0.3 C from the station mean1959: 4.6 C, +0.3 C from the station mean1960: 4.8 C, +0.5 C from the station mean1961: 5.4 C, +1.1 C from the station mean1962: 4.7 C, +0.4 C from the station mean1963: 4.7 C, +0.4 C from the station mean1964: 5.4 C, +1.1 C from the station mean1965: 4.1 C, -0.2 C from the station mean1966: 4.5 C, +0.2 C from the station mean1967: 4.0 C, -0.3 C from the station mean1968: 5.2 C, +0.9 C from the station mean1969: 4.5 C, +0.2 C from the station mean1970: 4.8 C, +0.6 C from the station mean1971: 4.4 C, +0.2 C from the station mean1972: 3.0 C, -1.3 C from the station mean1973: 4.7 C, +0.4 C from the station mean1974: 3.2 C, -1.1 C from the station mean1975: 4.0 C, -0.2 C from the station mean1976: 3.0 C, -1.2 C from the station mean1977: 4.1 C, -0.1 C from the station mean1978: 3.1 C, -1.2 C from the station mean1979: 2.5 C, -1.8 C from the station mean1980: 3.4 C, -0.9 C from the station mean1981: 4.4 C, +0.1 C from the station mean1983: 4.4 C, +0.1 C from the station mean1984: 4.2 C, -0.1 C from the station mean1985: 3.1 C, -1.2 C from the station mean1986: 4.2 C, 0.0 C from the station mean1987: 5.9 C, +1.6 C from the station mean1988: 4.1 C, -0.2 C from the station mean1989: 2.9 C, -1.4 C from the station mean1990: 4.9 C, +0.6 C from the station mean1991: 4.3 C, 0.0 C from the station mean1992: 3.4 C, -0.8 C from the station mean1993: 3.4 C, -0.9 C from the station mean1994: 3.9 C, -0.4 C from the station mean1995: 4.1 C, -0.2 C from the station mean19471950195519601965197019751980198519901995
One stripe for each of 47 complete years at Rainbow Rsvr Tomahawk, 1947 to 1995. Blue stripes are years cooler than the station's own mean of 4.3 C (39.7 F); red stripes are warmer. The coolest year was 1979, at 2.5 C (36.5 F), and the warmest was 1987, at 5.9 C (42.5 F). The strongest colour marks a difference of 1.8 C (3.2 F).
Annual mean temperature at Rainbow Rsvr Tomahawk as warming stripes, 1947 to 1995
YearAnnual mean temperatureDifference from the station mean
19474.7 C+0.45 C
19495.6 C+1.36 C
19503.1 C-1.18 C
19513.5 C-0.75 C
19525.2 C+0.94 C
19535.7 C+1.40 C
19545.1 C+0.80 C
19555.1 C+0.84 C
19564.7 C+0.39 C
19574.7 C+0.44 C
19584.6 C+0.32 C
19594.6 C+0.34 C
19604.8 C+0.50 C
19615.4 C+1.13 C
19624.7 C+0.42 C
19634.7 C+0.42 C
19645.4 C+1.12 C
19654.1 C-0.23 C
19664.5 C+0.18 C
19674.0 C-0.32 C
19685.2 C+0.87 C
19694.5 C+0.20 C
19704.8 C+0.56 C
19714.4 C+0.15 C
19723.0 C-1.32 C
19734.7 C+0.37 C
19743.2 C-1.11 C
19754.0 C-0.24 C
19763.0 C-1.24 C
19774.1 C-0.14 C
19783.1 C-1.19 C
19792.5 C-1.78 C
19803.4 C-0.86 C
19814.4 C+0.08 C
19834.4 C+0.07 C
19844.2 C-0.06 C
19853.1 C-1.19 C
19864.2 C-0.05 C
19875.9 C+1.57 C
19884.1 C-0.20 C
19892.9 C-1.42 C
19904.9 C+0.57 C
19914.3 C-0.01 C
19923.4 C-0.85 C
19933.4 C-0.89 C
19943.9 C-0.43 C
19954.1 C-0.21 C

The annual mean temperature here has fallen by 0.3 C (0.1 to 0.4) per decade over 1947 to 1995. In Fahrenheit: 0.5 F (0.2 to 0.7) per decade. The slope is a straight line fitted to 47 complete years; the brackets give its 95 percent interval.

Fitted temperature trends per decade at Rainbow Rsvr Tomahawk
MeasurePer decade (C)Per decade (F)PeriodComplete yearsReading
Annual mean temperature-0.3 C (-0.4 to -0.1) per decade-0.5 F (-0.7 to -0.2) per decade1947 to 199547Fall
Mean daily maximum-0.2 C (-0.4 to -0.1) per decade-0.4 F (-0.8 to -0.1) per decade1947 to 199547Fall
Mean daily minimum-0.3 C (-0.4 to -0.1) per decade-0.5 F (-0.8 to -0.2) per decade1947 to 199547Fall

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

1946 to 1996
Yearly extremes at Rainbow Rsvr Tomahawk: the record and the median year
MeasureRecordYear of the recordMedian yearYears with a value
Hottest day (TXx)37.2 C (99.0 F)194732.2 C (90.0 F)51
Coldest night (TNn)-41.1 C (-42.0 F)1950-33.3 C (-27.9 F)51
Wettest day (Rx1day)192.0 mm (7.6 in)198149.8 mm (2.0 in)51
Wettest five days (Rx5day)239.0 mm (9.4 in)198184.6 mm (3.3 in)51
Longest dry spell (CDD)44 days195319 days51

Hottest day (TXx)

Hottest day (TXx) at Rainbow Rsvr Tomahawk by year The hottest day of the year at Rainbow Rsvr Tomahawk, 1946 to 1996. The record is 37.2 C (99.0 F) in 1947, marked on the chart; the median year is 32.2 C (90.0 F). 2530354019501960197019801990Record: 37.2 C (99.0 F) in 1947
The hottest day of the year at Rainbow Rsvr Tomahawk, 1946 to 1996. The record is 37.2 C (99.0 F) in 1947, marked on the chart; the median year is 32.2 C (90.0 F).
Hottest day (TXx) at Rainbow Rsvr Tomahawk by year
YearHottest day (TXx)
194626.1 C (79.0 F)
194737.2 C (99.0 F)
194834.4 C (93.9 F)
194932.2 C (90.0 F)
195031.1 C (88.0 F)
195129.4 C (84.9 F)
195230.6 C (87.1 F)
195332.2 C (90.0 F)
195430.6 C (87.1 F)
195535.6 C (96.1 F)
195633.3 C (91.9 F)
195732.8 C (91.0 F)
195831.1 C (88.0 F)
195931.1 C (88.0 F)
196032.2 C (90.0 F)
196131.7 C (89.1 F)
196230.0 C (86.0 F)
196336.1 C (97.0 F)
196435.0 C (95.0 F)
196532.2 C (90.0 F)
196632.8 C (91.0 F)
196729.4 C (84.9 F)
196832.2 C (90.0 F)
196931.1 C (88.0 F)
197033.3 C (91.9 F)
197133.9 C (93.0 F)
197230.6 C (87.1 F)
197333.3 C (91.9 F)
197435.0 C (95.0 F)
197533.3 C (91.9 F)
197634.4 C (93.9 F)
197734.4 C (93.9 F)
197830.6 C (87.1 F)
197930.6 C (87.1 F)
198032.2 C (90.0 F)
198131.1 C (88.0 F)
198230.6 C (87.1 F)
198332.2 C (90.0 F)
198431.7 C (89.1 F)
198530.0 C (86.0 F)
198633.3 C (91.9 F)
198732.8 C (91.0 F)
198835.0 C (95.0 F)
198933.3 C (91.9 F)
199032.2 C (90.0 F)
199132.2 C (90.0 F)
199231.7 C (89.1 F)
199330.6 C (87.1 F)
199430.6 C (87.1 F)
199535.6 C (96.1 F)
199633.3 C (91.9 F)

Coldest night (TNn)

Coldest night (TNn) at Rainbow Rsvr Tomahawk by year The coldest night of the year at Rainbow Rsvr Tomahawk, 1946 to 1996. The record is -41.1 C (-42.0 F) in 1950, marked on the chart; the median year is -33.3 C (-27.9 F). -45-40-35-30-2519501960197019801990Record: -41.1 C (-42.0 F) in 1950
The coldest night of the year at Rainbow Rsvr Tomahawk, 1946 to 1996. The record is -41.1 C (-42.0 F) in 1950, marked on the chart; the median year is -33.3 C (-27.9 F).
Coldest night (TNn) at Rainbow Rsvr Tomahawk by year
YearColdest night (TNn)
1946-30.6 C (-23.1 F)
1947-37.8 C (-36.0 F)
1948-29.4 C (-20.9 F)
1949-30.6 C (-23.1 F)
1950-41.1 C (-42.0 F)
1951-40.6 C (-41.1 F)
1952-31.7 C (-25.1 F)
1953-30.6 C (-23.1 F)
1954-35.0 C (-31.0 F)
1955-32.2 C (-26.0 F)
1956-32.2 C (-26.0 F)
1957-30.6 C (-23.1 F)
1958-31.7 C (-25.1 F)
1959-33.9 C (-29.0 F)
1960-31.1 C (-24.0 F)
1961-29.4 C (-20.9 F)
1962-40.0 C (-40.0 F)
1963-37.2 C (-35.0 F)
1964-31.7 C (-25.1 F)
1965-34.4 C (-29.9 F)
1966-35.6 C (-32.1 F)
1967-39.4 C (-38.9 F)
1968-35.0 C (-31.0 F)
1969-30.0 C (-22.0 F)
1970-36.7 C (-34.1 F)
1971-40.0 C (-40.0 F)
1972-40.0 C (-40.0 F)
1973-35.6 C (-32.1 F)
1974-38.9 C (-38.0 F)
1975-33.3 C (-27.9 F)
1976-32.2 C (-26.0 F)
1977-40.6 C (-41.1 F)
1978-33.3 C (-27.9 F)
1979-41.1 C (-42.0 F)
1980-31.7 C (-25.1 F)
1981-31.1 C (-24.0 F)
1982-38.9 C (-38.0 F)
1983-34.4 C (-29.9 F)
1984-34.4 C (-29.9 F)
1985-35.6 C (-32.1 F)
1986-29.4 C (-20.9 F)
1987-31.1 C (-24.0 F)
1988-32.2 C (-26.0 F)
1989-33.3 C (-27.9 F)
1990-31.7 C (-25.1 F)
1991-34.4 C (-29.9 F)
1992-32.8 C (-27.0 F)
1993-30.6 C (-23.1 F)
1994-36.1 C (-33.0 F)
1995-28.9 C (-20.0 F)
1996-40.0 C (-40.0 F)

Wettest day (Rx1day)

Wettest day (Rx1day) at Rainbow Rsvr Tomahawk by year The wettest day of the year at Rainbow Rsvr Tomahawk, 1946 to 1996. The record is 192.0 mm (7.6 in) in 1981, marked on the chart; the median year is 49.8 mm (2.0 in). 05010015020019501960197019801990Record: 192.0 mm (7.6 in) in 1981
The wettest day of the year at Rainbow Rsvr Tomahawk, 1946 to 1996. The record is 192.0 mm (7.6 in) in 1981, marked on the chart; the median year is 49.8 mm (2.0 in).
Wettest day (Rx1day) at Rainbow Rsvr Tomahawk by year
YearWettest day (Rx1day)
194644.5 mm (1.8 in)
194743.7 mm (1.7 in)
194839.4 mm (1.6 in)
194967.1 mm (2.6 in)
195058.9 mm (2.3 in)
195155.1 mm (2.2 in)
195247.5 mm (1.9 in)
1953104.9 mm (4.1 in)
195439.1 mm (1.5 in)
195552.8 mm (2.1 in)
195649.5 mm (1.9 in)
195753.1 mm (2.1 in)
195899.1 mm (3.9 in)
195966.0 mm (2.6 in)
196057.9 mm (2.3 in)
196136.3 mm (1.4 in)
196235.6 mm (1.4 in)
196342.9 mm (1.7 in)
196442.4 mm (1.7 in)
196562.2 mm (2.4 in)
196678.0 mm (3.1 in)
196743.4 mm (1.7 in)
196851.3 mm (2.0 in)
196963.5 mm (2.5 in)
197062.5 mm (2.5 in)
197150.3 mm (2.0 in)
197286.4 mm (3.4 in)
197339.4 mm (1.6 in)
197463.5 mm (2.5 in)
197555.1 mm (2.2 in)
197682.0 mm (3.2 in)
197765.3 mm (2.6 in)
197849.0 mm (1.9 in)
197949.8 mm (2.0 in)
198061.7 mm (2.4 in)
1981192.0 mm (7.6 in)
198238.1 mm (1.5 in)
198374.7 mm (2.9 in)
198440.9 mm (1.6 in)
198560.2 mm (2.4 in)
198647.8 mm (1.9 in)
198733.0 mm (1.3 in)
198837.8 mm (1.5 in)
198945.0 mm (1.8 in)
199041.7 mm (1.6 in)
199146.2 mm (1.8 in)
199232.0 mm (1.3 in)
199343.2 mm (1.7 in)
199449.8 mm (2.0 in)
199556.4 mm (2.2 in)
199641.4 mm (1.6 in)

Wettest five days (Rx5day)

Wettest five days (Rx5day) at Rainbow Rsvr Tomahawk by year The wettest five days of the year at Rainbow Rsvr Tomahawk, 1946 to 1996. The record is 239.0 mm (9.4 in) in 1981, marked on the chart; the median year is 84.6 mm (3.3 in). 5010015020025019501960197019801990Record: 239.0 mm (9.4 in) in 1981
The wettest five days of the year at Rainbow Rsvr Tomahawk, 1946 to 1996. The record is 239.0 mm (9.4 in) in 1981, marked on the chart; the median year is 84.6 mm (3.3 in).
Wettest five days (Rx5day) at Rainbow Rsvr Tomahawk by year
YearWettest five days (Rx5day)
194664.4 mm (2.5 in)
194754.6 mm (2.1 in)
194860.5 mm (2.4 in)
1949112.5 mm (4.4 in)
195059.2 mm (2.3 in)
195196.7 mm (3.8 in)
195289.2 mm (3.5 in)
1953140.2 mm (5.5 in)
195495.0 mm (3.7 in)
1955118.8 mm (4.7 in)
195661.0 mm (2.4 in)
195767.5 mm (2.7 in)
1958111.0 mm (4.4 in)
1959100.2 mm (3.9 in)
196089.2 mm (3.5 in)
196161.5 mm (2.4 in)
196270.1 mm (2.8 in)
196372.2 mm (2.8 in)
196465.0 mm (2.6 in)
196573.4 mm (2.9 in)
196692.0 mm (3.6 in)
196754.6 mm (2.1 in)
196898.8 mm (3.9 in)
196971.7 mm (2.8 in)
197086.8 mm (3.4 in)
1971121.4 mm (4.8 in)
1972170.0 mm (6.7 in)
197385.2 mm (3.4 in)
1974111.7 mm (4.4 in)
197576.0 mm (3.0 in)
197682.0 mm (3.2 in)
1977135.2 mm (5.3 in)
1978116.1 mm (4.6 in)
1979103.9 mm (4.1 in)
1980103.3 mm (4.1 in)
1981239.0 mm (9.4 in)
198253.6 mm (2.1 in)
1983108.5 mm (4.3 in)
198471.9 mm (2.8 in)
198580.0 mm (3.1 in)
198660.3 mm (2.4 in)
198772.6 mm (2.9 in)
198868.8 mm (2.7 in)
198981.8 mm (3.2 in)
199073.9 mm (2.9 in)
199184.6 mm (3.3 in)
199260.1 mm (2.4 in)
199388.7 mm (3.5 in)
199495.4 mm (3.8 in)
199589.2 mm (3.5 in)
199664.8 mm (2.6 in)

Longest dry spell (CDD)

Longest dry spell (CDD) at Rainbow Rsvr Tomahawk by year The longest dry spell of the year at Rainbow Rsvr Tomahawk, 1946 to 1996. The record is 44 days in 1953, marked on the chart; the median year is 19 days. 102030405019501960197019801990Record: 44 days in 1953
The longest dry spell of the year at Rainbow Rsvr Tomahawk, 1946 to 1996. The record is 44 days in 1953, marked on the chart; the median year is 19 days.
Longest dry spell (CDD) at Rainbow Rsvr Tomahawk by year
YearLongest dry spell (CDD)
194615 days
194717 days
194822 days
194924 days
195020 days
195121 days
195228 days
195344 days
195421 days
195519 days
195618 days
195717 days
195816 days
195926 days
196026 days
196117 days
196224 days
196317 days
196423 days
196517 days
196617 days
196725 days
196820 days
196925 days
197015 days
197113 days
197217 days
197317 days
197415 days
197523 days
197637 days
197713 days
197827 days
197918 days
198031 days
198118 days
198212 days
198325 days
198421 days
198514 days
198620 days
198722 days
198816 days
198923 days
199014 days
199116 days
199218 days
199340 days
199422 days
199519 days
199611 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.

Frost Dates and Growing Season

47 years with a frost

Across 47 years with a frost, the median last spring frost at Rainbow Rsvr Tomahawk falls on 30 May and the median first autumn frost on 22 September, which leaves a median of 114 days between them.

Fitted over all years, the growing season changes by +3.9 days per decade at this station.

Frost dates and growing season at Rainbow Rsvr Tomahawk
MeasureMedian, all yearsEarliest periodRecent period (1965 to 1995)Recent against earliestFitted trend
Last spring frost30 Mayn/a27 Mayn/a-2.4 days per decade
First autumn frost22 Septembern/a22 Septembern/a+1.5 days per decade
Growing days114 daysn/a120 daysn/a+3.9 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.

Rainfall Return Levels

49 years, 1947 to 1995

A day with at least 50.2 mm (2.0 in) of rain is expected about once in 2 years. A day with at least 156.6 mm (6.2 in) of rain is expected about once in 100 years.

Rainfall return levels at Rainbow Rsvr Tomahawk: the daily rain expected about once in a given number of years
Expected about once inA day with at leastNote
2 years50.2 mm (2.0 in)
5 years67.1 mm (2.6 in)
10 years81.9 mm (3.2 in)
25 years106.0 mm (4.2 in)
50 years128.8 mm (5.1 in)Longer than the 49 years of record
100 years156.6 mm (6.2 in)Longer than the 49 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, 49 years of values from 1947 to 1995.

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: 192.0 mm (7.6 in) in 1981; 104.9 mm (4.1 in) in 1953; 99.1 mm (3.9 in) in 1958.

Station Changes

No change in the annual mean temperature of this station was found against its neighbours.

Download the Data

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