Built 2026-10-15 (15 October 2026)

Wistaria Weather Records (CA001088970)

Record envelope, standing records and threshold days for Wistaria (CA001088970), British Columbia, Canada, with 79 years of record.

Key Facts for Wistaria

  • Wistaria (CA001088970) is a weather station in British Columbia, Canada at 53.83 latitude and -126.22 longitude, 863 m (2,831 ft) above sea level.
  • The station reports from 1926 to 2004, 79 years of record.
  • 1,464 records set at Wistaria still stand.
  • Records are tracked for tmax, tmin, prcp, snow: an element needs 30 years of data to be eligible.
  • Wistaria set a daily record low minimum temperature of -29.0 C (-20.2 F) on 22 December 1983.

About the Station

  • Location: British Columbia, Canada, 53.83 latitude, -126.22 longitude.
  • Elevation: 863 m (2,831 ft).
  • Period of record: 1926 to 2004, 79 years.
  • Eligible elements: tmax, tmin, prcp, snow.

Daily Record Envelope and 2026

0 days at or beyond a record
Daily record high and record low at Wistaria, with 2026 drawn through them The band shows the record high and record low for each calendar day at Wistaria. 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 Wistaria. 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 Wistaria, with 2026 drawn through them
MonthHighest record highLowest record low2026 highest maximum2026 lowest minimum
Jan11.1 C (52.0 F)-43.9 C (-47.0 F)n/an/a
Feb12.8 C (55.0 F)-40.6 C (-41.1 F)n/an/a
Mar18.3 C (64.9 F)-36.1 C (-33.0 F)n/an/a
Apr26.7 C (80.1 F)-25.6 C (-14.1 F)n/an/a
May35.6 C (96.1 F)-9.4 C (15.1 F)n/an/a
Jun32.8 C (91.0 F)-4.4 C (24.1 F)n/an/a
Jul36.1 C (97.0 F)-2.8 C (27.0 F)n/an/a
Aug35.6 C (96.1 F)-3.3 C (26.1 F)n/an/a
Sep33.9 C (93.0 F)-19.4 C (-2.9 F)n/an/a
Oct24.4 C (75.9 F)-18.9 C (-2.0 F)n/an/a
Nov18.0 C (64.4 F)-31.1 C (-24.0 F)n/an/a
Dec11.5 C (52.7 F)-41.7 C (-43.1 F)n/an/a

Which Years Hold Standing Records

1,464 standing records
Standing records at Wistaria by the year they were set 1,464 records at Wistaria still stand. 1929 holds the most, with 54. 02040601926: 451927: 361928: 411929: 541930: 521931: 301932: 361933: 401934: 271935: 381936: 461937: 161938: 151939: 201940: 221941: 211942: 211943: 211944: 181945: 141946: 181947: 221948: 121949: 221950: 301951: 411952: 241953: 81954: 371955: 381956: 221957: 201958: 341959: 291960: 141961: 91962: 181963: 281964: 241965: 321966: 181967: 161968: 241969: 301970: 151971: 291972: 231973: 191974: 111975: 201976: 131977: 261978: 181979: 331980: 211981: 221982: 171983: 141926193219381944195019561962196819741980
1,464 records at Wistaria still stand. 1929 holds the most, with 54.
Standing records at Wistaria by the year they were set
Year setStanding records
192645
192736
192841
192954
193052
193130
193236
193340
193427
193538
193646
193716
193815
193920
194022
194121
194221
194321
194418
194514
194618
194722
194812
194922
195030
195141
195224
19538
195437
195538
195622
195720
195834
195929
196014
19619
196218
196328
196424
196532
196618
196716
196824
196930
197015
197129
197223
197319
197411
197520
197613
197726
197818
197933
198021
198122
198217
198314

All-Time Record Progression

1 new records
When Wistaria set new all-time records 1 all-time records were set at Wistaria between 29 December 1968 and 29 December 1968. Each dot is a new record. Record low maximum temperature29 December 1968: Record low maximum temperature -34.4 C (-29.9 F)
1 all-time records were set at Wistaria between 29 December 1968 and 29 December 1968. Each dot is a new record.
When Wistaria set new all-time records
DateKindDetail
1968-12-29Record low maximum temperatureRecord low maximum temperature -34.4 C (-29.9 F)

Wettest Day of Each Month

Dec: 43.2 mm (1.7 in)
Record daily precipitation for each month at Wistaria The wettest day on record for each calendar month at Wistaria. The most was 43.2 mm (1.7 in) on 31 December 1934. 0204060 Jan: 25.4 mm (1.0 in), 12 January 1943 Jan Feb: 18.3 mm (0.7 in), 12 February 1954 Feb Mar: 31.8 mm (1.3 in), 6 March 1928 Mar Apr: 22.9 mm (0.9 in), 17 April 1952 Apr May: 23.4 mm (0.9 in), 24 May 1954 May Jun: 33.3 mm (1.3 in), 25 June 1962 Jun Jul: 39.6 mm (1.6 in), 20 July 1934 Jul Aug: 37.5 mm (1.5 in), 11 August 1978 Aug Sep: 32.3 mm (1.3 in), 17 September 1930 Sep Oct: 30.0 mm (1.2 in), 23 October 1966 Oct Nov: 37.6 mm (1.5 in), 16 November 1976 Nov Dec: 43.2 mm (1.7 in), 31 December 1934 Dec
The wettest day on record for each calendar month at Wistaria. The most was 43.2 mm (1.7 in) on 31 December 1934.
Record daily precipitation for each month at Wistaria
MonthRecord daily precipitation (mm)Date
Jan25.4 mm (1.0 in)12 January 1943
Feb18.3 mm (0.7 in)12 February 1954
Mar31.8 mm (1.3 in)6 March 1928
Apr22.9 mm (0.9 in)17 April 1952
May23.4 mm (0.9 in)24 May 1954
Jun33.3 mm (1.3 in)25 June 1962
Jul39.6 mm (1.6 in)20 July 1934
Aug37.5 mm (1.5 in)11 August 1978
Sep32.3 mm (1.3 in)17 September 1930
Oct30.0 mm (1.2 in)23 October 1966
Nov37.6 mm (1.5 in)16 November 1976
Dec43.2 mm (1.7 in)31 December 1934

Period of Record Coverage

1926 to 1983
Days with data per year at Wistaria 58 years of record at Wistaria, 1926 to 1983. Every year has data for at least 90 percent of its days. 1926: 359 of 365 days1927: 365 of 365 days1928: 366 of 366 days1929: 365 of 365 days1930: 365 of 365 days1931: 365 of 365 days1932: 366 of 366 days1933: 365 of 365 days1934: 365 of 365 days1935: 365 of 365 days1936: 366 of 366 days1937: 365 of 365 days1938: 365 of 365 days1939: 365 of 365 days1940: 366 of 366 days1941: 365 of 365 days1942: 365 of 365 days1943: 365 of 365 days1944: 366 of 366 days1945: 365 of 365 days1946: 365 of 365 days1947: 365 of 365 days1948: 366 of 366 days1949: 365 of 365 days1950: 365 of 365 days1951: 365 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: 365 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: 366 of 366 days1969: 365 of 365 days1970: 365 of 365 days1971: 365 of 365 days1972: 366 of 366 days1973: 365 of 365 days1974: 365 of 365 days1975: 365 of 365 days1976: 366 of 366 days1977: 365 of 365 days1978: 365 of 365 days1979: 365 of 365 days1980: 366 of 366 days1981: 365 of 365 days1982: 365 of 365 days1983: 365 of 365 days193019401950196019701980
58 years of record at Wistaria, 1926 to 1983. Every year has data for at least 90 percent of its days.
Days with data per year at Wistaria
YearDays with dataShare of yearComplete
192635998%Yes
1927365100%Yes
1928366100%Yes
1929365100%Yes
1930365100%Yes
1931365100%Yes
1932366100%Yes
1933365100%Yes
1934365100%Yes
1935365100%Yes
1936366100%Yes
1937365100%Yes
1938365100%Yes
1939365100%Yes
1940366100%Yes
1941365100%Yes
1942365100%Yes
1943365100%Yes
1944366100%Yes
1945365100%Yes
1946365100%Yes
1947365100%Yes
1948366100%Yes
1949365100%Yes
1950365100%Yes
1951365100%Yes
1952366100%Yes
1953365100%Yes
1954365100%Yes
1955365100%Yes
1956366100%Yes
1957365100%Yes
1958365100%Yes
1959365100%Yes
1960366100%Yes
1961365100%Yes
1962365100%Yes
1963365100%Yes
1964366100%Yes
1965365100%Yes
1966365100%Yes
1967365100%Yes
1968366100%Yes
1969365100%Yes
1970365100%Yes
1971365100%Yes
1972366100%Yes
1973365100%Yes
1974365100%Yes
1975365100%Yes
1976366100%Yes
1977365100%Yes
1978365100%Yes
1979365100%Yes
1980366100%Yes
1981365100%Yes
1982365100%Yes
1983365100%Yes

Latest Records

20
Latest records at Wistaria
DateStationRecordValueBeat old record byOld record stoodSignificance
22 December 1983Wistaria, CAdaily low min-29.0 C (-20.2 F)1.8 C (3.2 F)49 years21 of 100 (Routine)
20 December 1983Wistaria, CAdaily low min-27.0 C (-16.6 F)0.9 C (1.6 F)49 years20 of 100 (Routine)
24 November 1983Wistaria, CAdaily snowfall10.0 cm (3.9 in)1.1 cm (0.4 in)32 years16 of 100 (Routine)
28 September 1983Wistaria, CAdaily low min-5.0 C (23.0 F)0.6 C (1.1 F)53 years22 of 100 (Routine)
19 September 1983Wistaria, CAdaily low min-4.5 C (23.9 F)1.2 C (2.2 F)56 years25 of 100 (Routine)
17 September 1983Wistaria, CAdaily low max8.0 C (46.4 F)2.0 C (3.6 F)54 years24 of 100 (Routine)
10 August 1983Wistaria, CAdaily high min14.5 C (58.1 F)0.5 C (0.9 F)1 year6 of 100 (Routine)
13 July 1983Wistaria, CAdaily low max10.0 C (50.0 F)2.8 C (5.0 F)16 years14 of 100 (Routine)
1 June 1983Wistaria, CAdaily rain14.0 mm (0.6 in)0.5 mm (0.02 in)41 years18 of 100 (Routine)
30 May 1983Wistaria, CAmonthly high min14.5 C (58.1 F)2.8 C (5.0 F)51 years38 of 100 (Notable)
29 May 1983Wistaria, CAdaily high max34.0 C (93.2 F)2.3 C (4.1 F)50 years24 of 100 (Routine)
3 May 1983Wistaria, CAdaily high min5.0 C (41.0 F)0.6 C (1.1 F)37 years17 of 100 (Routine)
2 May 1983Wistaria, CAdaily high min4.5 C (40.1 F)1.0 C (1.8 F)4 years9 of 100 (Routine)
25 April 1983Wistaria, CAdaily high min5.5 C (41.9 F)1.1 C (2.0 F)21 years13 of 100 (Routine)
16 April 1983Wistaria, CAdaily high min4.0 C (39.2 F)0.1 C (0.2 F)30 years14 of 100 (Routine)
8 March 1983Wistaria, CAdaily rain8.8 mm (0.35 in)0.4 mm (0.02 in)8 years8 of 100 (Routine)
8 March 1983Wistaria, CAdaily snowfall8.8 cm (3.5 in)0.4 cm (0.2 in)8 years8 of 100 (Routine)
11 February 1983Wistaria, CAdaily high min-1.0 C (30.2 F)1.2 C (2.2 F)52 years21 of 100 (Routine)
10 January 1983Wistaria, CAdaily snowfall9.6 cm (3.8 in)4.3 cm (1.7 in)29 years24 of 100 (Routine)
10 January 1983Wistaria, CAdaily rain9.6 mm (0.38 in)4.3 mm (0.17 in)29 years20 of 100 (Routine)

Climate Trend

57 complete years, 1926 to 1983
Annual mean temperature at Wistaria as warming stripes, 1926 to 1983 One stripe for each of 57 complete years at Wistaria, 1926 to 1983. Blue stripes are years cooler than the station's own mean of 2.6 C (36.6 F); red stripes are warmer. The coolest year was 1955, at 0.3 C (32.5 F), and the warmest was 1926, at 4.6 C (40.2 F). The strongest colour marks a difference of 2.3 C (4.1 F). 1926: 4.6 C, +2.0 C from the station mean1927: 1.8 C, -0.7 C from the station mean1928: 3.9 C, +1.3 C from the station mean1929: 3.0 C, +0.5 C from the station mean1930: 3.2 C, +0.7 C from the station mean1931: 4.0 C, +1.4 C from the station mean1932: 3.1 C, +0.6 C from the station mean1933: 1.5 C, -1.1 C from the station mean1934: 3.7 C, +1.1 C from the station mean1935: 2.0 C, -0.6 C from the station mean1936: 1.8 C, -0.8 C from the station mean1937: 1.6 C, -1.0 C from the station mean1938: 3.1 C, +0.6 C from the station mean1939: 3.5 C, +0.9 C from the station mean1940: 3.3 C, +0.7 C from the station mean1941: 3.5 C, +0.9 C from the station mean1942: 3.7 C, +1.2 C from the station mean1943: 3.0 C, +0.4 C from the station mean1944: 3.7 C, +1.2 C from the station mean1945: 2.5 C, -0.1 C from the station mean1946: 2.9 C, +0.3 C from the station mean1947: 3.5 C, +1.0 C from the station mean1948: 2.5 C, -0.1 C from the station mean1949: 1.8 C, -0.7 C from the station mean1950: 0.5 C, -2.1 C from the station mean1951: 1.5 C, -1.1 C from the station mean1952: 2.8 C, +0.2 C from the station mean1953: 2.8 C, +0.3 C from the station mean1954: 1.5 C, -1.1 C from the station mean1955: 0.3 C, -2.3 C from the station mean1957: 1.7 C, -0.8 C from the station mean1958: 3.9 C, +1.3 C from the station mean1959: 1.9 C, -0.6 C from the station mean1960: 2.6 C, 0.0 C from the station mean1961: 3.2 C, +0.6 C from the station mean1962: 2.5 C, -0.1 C from the station mean1963: 3.6 C, +1.0 C from the station mean1964: 1.8 C, -0.7 C from the station mean1965: 2.6 C, 0.0 C from the station mean1966: 2.2 C, -0.4 C from the station mean1967: 3.1 C, +0.5 C from the station mean1968: 1.8 C, -0.8 C from the station mean1969: 2.4 C, -0.2 C from the station mean1970: 2.0 C, -0.6 C from the station mean1971: 1.8 C, -0.7 C from the station mean1972: 1.5 C, -1.1 C from the station mean1973: 1.3 C, -1.2 C from the station mean1974: 2.6 C, 0.0 C from the station mean1975: 1.4 C, -1.2 C from the station mean1976: 2.5 C, -0.1 C from the station mean1977: 2.6 C, 0.0 C from the station mean1978: 2.7 C, +0.1 C from the station mean1979: 2.5 C, -0.1 C from the station mean1980: 2.9 C, +0.3 C from the station mean1981: 3.8 C, +1.3 C from the station mean1982: 1.8 C, -0.8 C from the station mean1983: 2.8 C, +0.3 C from the station mean192619301935194019451950195519601965197019751980
One stripe for each of 57 complete years at Wistaria, 1926 to 1983. Blue stripes are years cooler than the station's own mean of 2.6 C (36.6 F); red stripes are warmer. The coolest year was 1955, at 0.3 C (32.5 F), and the warmest was 1926, at 4.6 C (40.2 F). The strongest colour marks a difference of 2.3 C (4.1 F).
Annual mean temperature at Wistaria as warming stripes, 1926 to 1983
YearAnnual mean temperatureDifference from the station mean
19264.6 C+2.00 C
19271.8 C-0.73 C
19283.9 C+1.35 C
19293.0 C+0.47 C
19303.2 C+0.66 C
19314.0 C+1.43 C
19323.1 C+0.58 C
19331.5 C-1.09 C
19343.7 C+1.15 C
19352.0 C-0.56 C
19361.8 C-0.80 C
19371.6 C-0.95 C
19383.1 C+0.57 C
19393.5 C+0.93 C
19403.3 C+0.74 C
19413.5 C+0.95 C
19423.7 C+1.16 C
19433.0 C+0.44 C
19443.7 C+1.18 C
19452.5 C-0.06 C
19462.9 C+0.32 C
19473.5 C+0.98 C
19482.5 C-0.07 C
19491.8 C-0.74 C
19500.5 C-2.08 C
19511.5 C-1.07 C
19522.8 C+0.22 C
19532.8 C+0.26 C
19541.5 C-1.08 C
19550.3 C-2.28 C
19571.7 C-0.81 C
19583.9 C+1.35 C
19591.9 C-0.61 C
19602.6 C+0.02 C
19613.2 C+0.60 C
19622.5 C-0.09 C
19633.6 C+1.02 C
19641.8 C-0.72 C
19652.6 C+0.02 C
19662.2 C-0.38 C
19673.1 C+0.50 C
19681.8 C-0.75 C
19692.4 C-0.15 C
19702.0 C-0.58 C
19711.8 C-0.72 C
19721.5 C-1.09 C
19731.3 C-1.21 C
19742.6 C+0.05 C
19751.4 C-1.17 C
19762.5 C-0.10 C
19772.6 C+0.03 C
19782.7 C+0.11 C
19792.5 C-0.08 C
19802.9 C+0.31 C
19813.8 C+1.29 C
19821.8 C-0.76 C
19832.8 C+0.27 C

The annual mean temperature here has fallen by 0.15 C (0.01 to 0.29) per decade over 1926 to 1983. In Fahrenheit: 0.27 F (0.02 to 0.51) per decade. The slope is a straight line fitted to 57 complete years; the brackets give its 95 percent interval.

Fitted temperature trends per decade at Wistaria
MeasurePer decade (C)Per decade (F)PeriodComplete yearsReading
Annual mean temperature-0.15 C (-0.29 to -0.01) per decade-0.27 F (-0.51 to -0.02) per decade1926 to 198357Fall
Mean daily maximum-0.5 C (-0.6 to -0.3) per decade-0.8 F (-1.1 to -0.5) per decade1926 to 198357Fall
Mean daily minimum0.16 C (0.02 to 0.31) per decade0.30 F (0.03 to 0.56) per decade1926 to 198357Rise

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

1926 to 1983
Yearly extremes at Wistaria: the record and the median year
MeasureRecordYear of the recordMedian yearYears with a value
Hottest day (TXx)36.1 C (97.0 F)194129.7 C (85.5 F)58
Coldest night (TNn)-43.9 C (-47.0 F)1950-34.7 C (-30.5 F)58
Wettest day (Rx1day)43.2 mm (1.7 in)193424.1 mm (0.9 in)58
Wettest five days (Rx5day)68.1 mm (2.7 in)197541.6 mm (1.6 in)58
Longest dry spell (CDD)54 days193824 days58

Hottest day (TXx)

Hottest day (TXx) at Wistaria by year The hottest day of the year at Wistaria, 1926 to 1983. The record is 36.1 C (97.0 F) in 1941, marked on the chart; the median year is 29.7 C (85.5 F). 2025303540193019401950196019701980Record: 36.1 C (97.0 F) in 1941
The hottest day of the year at Wistaria, 1926 to 1983. The record is 36.1 C (97.0 F) in 1941, marked on the chart; the median year is 29.7 C (85.5 F).
Hottest day (TXx) at Wistaria by year
YearHottest day (TXx)
192631.7 C (89.1 F)
192735.6 C (96.1 F)
192835.6 C (96.1 F)
192930.6 C (87.1 F)
193033.9 C (93.0 F)
193134.4 C (93.9 F)
193235.6 C (96.1 F)
193327.8 C (82.0 F)
193431.1 C (88.0 F)
193530.0 C (86.0 F)
193631.1 C (88.0 F)
193727.8 C (82.0 F)
193830.6 C (87.1 F)
193930.6 C (87.1 F)
194029.4 C (84.9 F)
194136.1 C (97.0 F)
194231.1 C (88.0 F)
194326.7 C (80.1 F)
194429.4 C (84.9 F)
194528.9 C (84.0 F)
194627.8 C (82.0 F)
194727.8 C (82.0 F)
194827.2 C (81.0 F)
194926.7 C (80.1 F)
195029.4 C (84.9 F)
195131.7 C (89.1 F)
195231.1 C (88.0 F)
195330.0 C (86.0 F)
195425.6 C (78.1 F)
195529.4 C (84.9 F)
195630.0 C (86.0 F)
195725.6 C (78.1 F)
195831.1 C (88.0 F)
195927.2 C (81.0 F)
196032.2 C (90.0 F)
196130.0 C (86.0 F)
196228.3 C (82.9 F)
196327.2 C (81.0 F)
196424.4 C (75.9 F)
196530.6 C (87.1 F)
196628.3 C (82.9 F)
196729.4 C (84.9 F)
196829.4 C (84.9 F)
196931.7 C (89.1 F)
197026.7 C (80.1 F)
197132.2 C (90.0 F)
197228.9 C (84.0 F)
197327.2 C (81.0 F)
197430.6 C (87.1 F)
197528.9 C (84.0 F)
197624.4 C (75.9 F)
197730.6 C (87.1 F)
197829.0 C (84.2 F)
197928.0 C (82.4 F)
198025.0 C (77.0 F)
198133.0 C (91.4 F)
198230.0 C (86.0 F)
198334.0 C (93.2 F)

Coldest night (TNn)

Coldest night (TNn) at Wistaria by year The coldest night of the year at Wistaria, 1926 to 1983. The record is -43.9 C (-47.0 F) in 1950, marked on the chart; the median year is -34.7 C (-30.5 F). -45-40-35-30-25-20193019401950196019701980Record: -43.9 C (-47.0 F) in 1950
The coldest night of the year at Wistaria, 1926 to 1983. The record is -43.9 C (-47.0 F) in 1950, marked on the chart; the median year is -34.7 C (-30.5 F).
Coldest night (TNn) at Wistaria by year
YearColdest night (TNn)
1926-26.7 C (-16.1 F)
1927-40.0 C (-40.0 F)
1928-40.6 C (-41.1 F)
1929-38.9 C (-38.0 F)
1930-38.9 C (-38.0 F)
1931-28.9 C (-20.0 F)
1932-36.1 C (-33.0 F)
1933-36.7 C (-34.1 F)
1934-34.4 C (-29.9 F)
1935-43.3 C (-45.9 F)
1936-40.6 C (-41.1 F)
1937-35.0 C (-31.0 F)
1938-30.0 C (-22.0 F)
1939-39.4 C (-38.9 F)
1940-24.4 C (-11.9 F)
1941-31.7 C (-25.1 F)
1942-25.6 C (-14.1 F)
1943-38.3 C (-36.9 F)
1944-28.3 C (-18.9 F)
1945-25.0 C (-13.0 F)
1946-27.2 C (-17.0 F)
1947-42.8 C (-45.0 F)
1948-30.6 C (-23.1 F)
1949-37.2 C (-35.0 F)
1950-43.9 C (-47.0 F)
1951-37.2 C (-35.0 F)
1952-32.2 C (-26.0 F)
1953-37.2 C (-35.0 F)
1954-33.3 C (-27.9 F)
1955-35.6 C (-32.1 F)
1956-35.6 C (-32.1 F)
1957-34.4 C (-29.9 F)
1958-30.0 C (-22.0 F)
1959-33.9 C (-29.0 F)
1960-28.3 C (-18.9 F)
1961-28.3 C (-18.9 F)
1962-33.9 C (-29.0 F)
1963-30.6 C (-23.1 F)
1964-35.6 C (-32.1 F)
1965-35.6 C (-32.1 F)
1966-32.2 C (-26.0 F)
1967-26.1 C (-15.0 F)
1968-41.7 C (-43.1 F)
1969-40.0 C (-40.0 F)
1970-34.4 C (-29.9 F)
1971-35.6 C (-32.1 F)
1972-37.2 C (-35.0 F)
1973-28.3 C (-18.9 F)
1974-33.9 C (-29.0 F)
1975-34.4 C (-29.9 F)
1976-36.1 C (-33.0 F)
1977-35.6 C (-32.1 F)
1978-35.5 C (-31.9 F)
1979-35.0 C (-31.0 F)
1980-34.0 C (-29.2 F)
1981-26.0 C (-14.8 F)
1982-37.0 C (-34.6 F)
1983-29.0 C (-20.2 F)

Wettest day (Rx1day)

Wettest day (Rx1day) at Wistaria by year The wettest day of the year at Wistaria, 1926 to 1983. The record is 43.2 mm (1.7 in) in 1934, marked on the chart; the median year is 24.1 mm (0.9 in). 1020304050193019401950196019701980Record: 43.2 mm (1.7 in) in 1934
The wettest day of the year at Wistaria, 1926 to 1983. The record is 43.2 mm (1.7 in) in 1934, marked on the chart; the median year is 24.1 mm (0.9 in).
Wettest day (Rx1day) at Wistaria by year
YearWettest day (Rx1day)
192626.9 mm (1.1 in)
192724.6 mm (1.0 in)
192831.8 mm (1.3 in)
192938.1 mm (1.5 in)
193032.3 mm (1.3 in)
193116.0 mm (0.6 in)
193221.6 mm (0.9 in)
193327.4 mm (1.1 in)
193443.2 mm (1.7 in)
193520.6 mm (0.8 in)
193626.7 mm (1.1 in)
193721.8 mm (0.9 in)
193826.4 mm (1.0 in)
193920.3 mm (0.8 in)
194022.4 mm (0.9 in)
194115.7 mm (0.6 in)
194214.2 mm (0.6 in)
194325.4 mm (1.0 in)
194422.1 mm (0.9 in)
194519.6 mm (0.8 in)
194630.0 mm (1.2 in)
194736.3 mm (1.4 in)
194817.8 mm (0.7 in)
194924.1 mm (0.9 in)
195032.8 mm (1.3 in)
195131.8 mm (1.3 in)
195222.9 mm (0.9 in)
195322.9 mm (0.9 in)
195423.4 mm (0.9 in)
195526.7 mm (1.1 in)
195617.8 mm (0.7 in)
195726.2 mm (1.0 in)
195822.1 mm (0.9 in)
195930.0 mm (1.2 in)
196023.4 mm (0.9 in)
196125.4 mm (1.0 in)
196233.3 mm (1.3 in)
196320.3 mm (0.8 in)
196424.1 mm (0.9 in)
196525.4 mm (1.0 in)
196630.0 mm (1.2 in)
196719.8 mm (0.8 in)
196819.1 mm (0.8 in)
196915.2 mm (0.6 in)
197020.3 mm (0.8 in)
197121.6 mm (0.9 in)
197235.1 mm (1.4 in)
197319.6 mm (0.8 in)
197419.1 mm (0.8 in)
197530.5 mm (1.2 in)
197637.6 mm (1.5 in)
197721.6 mm (0.9 in)
197837.5 mm (1.5 in)
197927.0 mm (1.1 in)
198022.8 mm (0.9 in)
198120.3 mm (0.8 in)
198233.0 mm (1.3 in)
198328.0 mm (1.1 in)

Wettest five days (Rx5day)

Wettest five days (Rx5day) at Wistaria by year The wettest five days of the year at Wistaria, 1926 to 1983. The record is 68.1 mm (2.7 in) in 1975, marked on the chart; the median year is 41.6 mm (1.6 in). 20406080193019401950196019701980Record: 68.1 mm (2.7 in) in 1975
The wettest five days of the year at Wistaria, 1926 to 1983. The record is 68.1 mm (2.7 in) in 1975, marked on the chart; the median year is 41.6 mm (1.6 in).
Wettest five days (Rx5day) at Wistaria by year
YearWettest five days (Rx5day)
192657.2 mm (2.3 in)
192734.6 mm (1.4 in)
192844.0 mm (1.7 in)
192960.7 mm (2.4 in)
193039.2 mm (1.5 in)
193140.3 mm (1.6 in)
193238.5 mm (1.5 in)
193352.8 mm (2.1 in)
193465.8 mm (2.6 in)
193553.6 mm (2.1 in)
193652.4 mm (2.1 in)
193748.0 mm (1.9 in)
193836.2 mm (1.4 in)
193935.8 mm (1.4 in)
194041.5 mm (1.6 in)
194142.1 mm (1.7 in)
194220.6 mm (0.8 in)
194326.4 mm (1.0 in)
194439.1 mm (1.5 in)
194541.2 mm (1.6 in)
194659.2 mm (2.3 in)
194761.9 mm (2.4 in)
194848.5 mm (1.9 in)
194945.7 mm (1.8 in)
195049.9 mm (2.0 in)
195154.2 mm (2.1 in)
195252.5 mm (2.1 in)
195343.7 mm (1.7 in)
195457.9 mm (2.3 in)
195539.5 mm (1.6 in)
195627.2 mm (1.1 in)
195764.8 mm (2.6 in)
195832.9 mm (1.3 in)
195946.3 mm (1.8 in)
196041.7 mm (1.6 in)
196136.1 mm (1.4 in)
196241.7 mm (1.6 in)
196335.6 mm (1.4 in)
196438.1 mm (1.5 in)
196536.0 mm (1.4 in)
196658.6 mm (2.3 in)
196740.0 mm (1.6 in)
196834.6 mm (1.4 in)
196934.6 mm (1.4 in)
197038.3 mm (1.5 in)
197140.9 mm (1.6 in)
197251.0 mm (2.0 in)
197331.8 mm (1.3 in)
197456.4 mm (2.2 in)
197568.1 mm (2.7 in)
197639.6 mm (1.6 in)
197734.3 mm (1.4 in)
197850.9 mm (2.0 in)
197936.4 mm (1.4 in)
198040.6 mm (1.6 in)
198128.8 mm (1.1 in)
198249.0 mm (1.9 in)
198342.0 mm (1.7 in)

Longest dry spell (CDD)

Longest dry spell (CDD) at Wistaria by year The longest dry spell of the year at Wistaria, 1926 to 1983. The record is 54 days in 1938, marked on the chart; the median year is 24 days. 0204060193019401950196019701980Record: 54 days in 1938
The longest dry spell of the year at Wistaria, 1926 to 1983. The record is 54 days in 1938, marked on the chart; the median year is 24 days.
Longest dry spell (CDD) at Wistaria by year
YearLongest dry spell (CDD)
192620 days
192739 days
192833 days
192932 days
193024 days
193133 days
193235 days
193316 days
193433 days
193525 days
193614 days
193720 days
193854 days
193918 days
194024 days
194117 days
194221 days
194324 days
194420 days
194518 days
194621 days
194717 days
194817 days
194922 days
195021 days
195139 days
195231 days
195322 days
195417 days
195521 days
195632 days
195720 days
195826 days
195927 days
196020 days
196139 days
196223 days
196321 days
196427 days
196527 days
196624 days
196724 days
196823 days
196938 days
197039 days
197135 days
197235 days
197322 days
197423 days
197516 days
197613 days
197721 days
197827 days
197931 days
198014 days
198127 days
198222 days
198342 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

57 years with a frost

Across 57 years with a frost, the median last spring frost at Wistaria falls on 15 June and the median first autumn frost on 18 August, which leaves a median of 65 days between them.

Fitted over all years, the growing season changes by +5.2 days per decade at this station.

Frost dates and growing season at Wistaria
MeasureMedian, all yearsEarliest periodRecent period (1953 to 1983)Recent against earliestFitted trend
Last spring frost15 Junen/a13 Junen/a-1.8 days per decade
First autumn frost18 Augustn/a21 Augustn/a+3.4 days per decade
Growing days65 daysn/a69 daysn/a+5.2 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

58 years, 1926 to 1983

A day with at least 24.4 mm (1.0 in) of rain is expected about once in 2 years. A day with at least 45.1 mm (1.8 in) of rain is expected about once in 100 years.

Rainfall return levels at Wistaria: the daily rain expected about once in a given number of years
Expected about once inA day with at leastNote
2 years24.4 mm (1.0 in)
5 years30.4 mm (1.2 in)
10 years34.1 mm (1.3 in)
25 years38.7 mm (1.5 in)
50 years41.9 mm (1.6 in)
100 years45.1 mm (1.8 in)Longer than the 58 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, 58 years of values from 1926 to 1983.

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: 43.2 mm (1.7 in) in 1934; 38.1 mm (1.5 in) in 1929; 37.6 mm (1.5 in) in 1976.

Station Changes

3 suspected

3 changes were suspected in the annual mean temperature of Wistaria, at 1933, 1942 and 1953. Each is measured against neighbouring stations.

  • Relative to 5 neighbouring stations, the station's annual mean temperature from 1933 ran 0.8 C (1.4 F) lower than in the years before (likely change).
  • Relative to 5 neighbouring stations, the station's annual mean temperature from 1942 ran 0.4 C (0.7 F) higher than in the years before (likely change).
  • Relative to 5 neighbouring stations, the station's annual mean temperature from 1953 ran 0.6 C (1.1 F) lower than in the years before (likely change).
Suspected changes in the annual mean temperature at Wistaria, against neighbouring stations
YearShift (C)Shift (F)StrengthNeighbours
1933-0.8-1.4likely5
1942+0.4+0.7likely5
1953-0.6-1.1likely5

Possible change at the station (a move, a new instrument or a new site); the record is kept as measured. A "likely" change has a larger test statistic than a "possible" one. Neither says why the station differs from its neighbours. How changes are found, and the largest ones.

Download the Data

  • Data for Wistaria standing records by year: CSV or JSON. Field meanings are on the data page.
  • Data for Wistaria 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 (2026-10-14).