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Electron Headworks Weather Records (USC00452493)

Record envelope, standing records and threshold days for Electron Headworks (USC00452493), Washington, United States, with 38 years of record.

Key Facts for Electron Headworks

  • Electron Headworks (USC00452493) is a weather station in Washington, United States at 46.90 latitude and -122.03 longitude, 528 m (1,732 ft) above sea level.
  • The station reports from 1943 to 1980, 38 years of record.
  • 1,464 records set at Electron Headworks still stand.
  • Records are tracked for tmax, tmin, prcp, snow, snwd: an element needs 30 years of data to be eligible.
  • Electron Headworks set a daily record low maximum temperature of 10.6 C (51.1 F) on 27 May 1980.

About the Station

  • Location: Washington, United States, 46.90 latitude, -122.03 longitude.
  • Elevation: 528 m (1,732 ft).
  • Period of record: 1943 to 1980, 38 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 Electron Headworks, with 2026 drawn through them The band shows the record high and record low for each calendar day at Electron Headworks. The lines show the 2026 daily maximum and minimum. 0 days in 2026 matched or passed a record. Temperatures are in degrees Celsius. -40-2002040 JanFebMarAprMayJunJulAugSepOctNovDec
The band shows the record high and record low for each calendar day at Electron Headworks. 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 Electron Headworks, with 2026 drawn through them
MonthHighest record highLowest record low2026 highest maximum2026 lowest minimum
Jan16.7 C (62.1 F)-21.1 C (-6.0 F)n/an/a
Feb19.4 C (66.9 F)-20.0 C (-4.0 F)n/an/a
Mar24.4 C (75.9 F)-17.2 C (1.0 F)n/an/a
Apr27.8 C (82.0 F)-5.6 C (21.9 F)n/an/a
May32.8 C (91.0 F)-3.3 C (26.1 F)n/an/a
Jun35.0 C (95.0 F)-2.2 C (28.0 F)n/an/a
Jul35.6 C (96.1 F)0.0 C (32.0 F)n/an/a
Aug37.8 C (100.0 F)-0.6 C (30.9 F)n/an/a
Sep36.1 C (97.0 F)-3.3 C (26.1 F)n/an/a
Oct31.1 C (88.0 F)-7.2 C (19.0 F)n/an/a
Nov22.2 C (72.0 F)-18.9 C (-2.0 F)n/an/a
Dec16.7 C (62.1 F)-19.4 C (-2.9 F)n/an/a

Which Years Hold Standing Records

1,464 standing records
Standing records at Electron Headworks by the year they were set 1,464 records at Electron Headworks still stand. 1950 holds the most, with 67. 0204060801943: 111944: 471945: 421946: 251947: 441948: 401949: 621950: 671951: 511952: 531953: 371954: 541955: 641956: 381957: 331958: 511959: 191960: 441961: 411962: 371963: 471964: 311965: 441966: 261967: 311968: 381969: 281970: 311971: 381972: 581973: 411974: 291975: 301976: 301977: 301978: 411979: 201980: 111943194719511955195919631967197119751979
1,464 records at Electron Headworks still stand. 1950 holds the most, with 67.
Standing records at Electron Headworks by the year they were set
Year setStanding records
194311
194447
194542
194625
194744
194840
194962
195067
195151
195253
195337
195454
195564
195638
195733
195851
195919
196044
196141
196237
196347
196431
196544
196626
196731
196838
196928
197031
197138
197258
197341
197429
197530
197630
197730
197841
197920
198011

All-Time Record Progression

2 new records
When Electron Headworks set new all-time records 2 all-time records were set at Electron Headworks between 17 August 1977 and 2 December 1977. Each dot is a new record. Record high maximum temperatureRecord daily precipitation17 August 1977: Record high maximum temperature 37.8 C (100.0 F)2 December 1977: Record daily precipitation 124.2 mm (4.9 in)
2 all-time records were set at Electron Headworks between 17 August 1977 and 2 December 1977. Each dot is a new record.
When Electron Headworks set new all-time records
DateKindDetail
1977-08-17Record high maximum temperatureRecord high maximum temperature 37.8 C (100.0 F)
1977-12-02Record daily precipitationRecord daily precipitation 124.2 mm (4.9 in)

Wettest Day of Each Month

Dec: 124.2 mm (4.9 in)
Record daily precipitation for each month at Electron Headworks The wettest day on record for each calendar month at Electron Headworks. The most was 124.2 mm (4.9 in) on 2 December 1977. 050100150 Jan: 87.9 mm (3.5 in), 25 January 1964 Jan Feb: 104.6 mm (4.1 in), 24 February 1950 Feb Mar: 77.0 mm (3.0 in), 7 March 1957 Mar Apr: 51.3 mm (2.0 in), 10 April 1970 Apr May: 52.6 mm (2.1 in), 20 May 1960 May Jun: 43.2 mm (1.7 in), 14 June 1946 Jun Jul: 35.3 mm (1.4 in), 28 July 1947 Jul Aug: 43.9 mm (1.7 in), 18 August 1975 Aug Sep: 49.0 mm (1.9 in), 26 September 1950 Sep Oct: 81.3 mm (3.2 in), 8 October 1958 Oct Nov: 113.3 mm (4.5 in), 20 November 1962 Nov Dec: 124.2 mm (4.9 in), 2 December 1977 Dec
The wettest day on record for each calendar month at Electron Headworks. The most was 124.2 mm (4.9 in) on 2 December 1977.
Record daily precipitation for each month at Electron Headworks
MonthRecord daily precipitation (mm)Date
Jan87.9 mm (3.5 in)25 January 1964
Feb104.6 mm (4.1 in)24 February 1950
Mar77.0 mm (3.0 in)7 March 1957
Apr51.3 mm (2.0 in)10 April 1970
May52.6 mm (2.1 in)20 May 1960
Jun43.2 mm (1.7 in)14 June 1946
Jul35.3 mm (1.4 in)28 July 1947
Aug43.9 mm (1.7 in)18 August 1975
Sep49.0 mm (1.9 in)26 September 1950
Oct81.3 mm (3.2 in)8 October 1958
Nov113.3 mm (4.5 in)20 November 1962
Dec124.2 mm (4.9 in)2 December 1977

Period of Record Coverage

1943 to 1980
Days with data per year at Electron Headworks 38 years of record at Electron Headworks, 1943 to 1980. 2 years have data for under 90 percent of days and are left out of rankings: 1943, 1980. 1943: 90 of 365 days1944: 363 of 366 days1945: 356 of 365 days1946: 361 of 365 days1947: 358 of 365 days1948: 357 of 366 days1949: 363 of 365 days1950: 365 of 365 days1951: 365 of 365 days1952: 366 of 366 days1953: 364 of 365 days1954: 364 of 365 days1955: 363 of 365 days1956: 366 of 366 days1957: 363 of 365 days1958: 365 of 365 days1959: 365 of 365 days1960: 365 of 366 days1961: 364 of 365 days1962: 359 of 365 days1963: 365 of 365 days1964: 364 of 366 days1965: 365 of 365 days1966: 365 of 365 days1967: 365 of 365 days1968: 366 of 366 days1969: 364 of 365 days1970: 361 of 365 days1971: 361 of 365 days1972: 366 of 366 days1973: 364 of 365 days1974: 365 of 365 days1975: 365 of 365 days1976: 366 of 366 days1977: 365 of 365 days1978: 365 of 365 days1979: 364 of 365 days1980: 150 of 366 days19451950195519601965197019751980
38 years of record at Electron Headworks, 1943 to 1980. 2 years have data for under 90 percent of days and are left out of rankings: 1943, 1980.
Days with data per year at Electron Headworks
YearDays with dataShare of yearComplete
19439025%No
194436399%Yes
194535698%Yes
194636199%Yes
194735898%Yes
194835798%Yes
194936399%Yes
1950365100%Yes
1951365100%Yes
1952366100%Yes
1953364100%Yes
1954364100%Yes
195536399%Yes
1956366100%Yes
195736399%Yes
1958365100%Yes
1959365100%Yes
1960365100%Yes
1961364100%Yes
196235998%Yes
1963365100%Yes
196436499%Yes
1965365100%Yes
1966365100%Yes
1967365100%Yes
1968366100%Yes
1969364100%Yes
197036199%Yes
197136199%Yes
1972366100%Yes
1973364100%Yes
1974365100%Yes
1975365100%Yes
1976366100%Yes
1977365100%Yes
1978365100%Yes
1979364100%Yes
198015041%No

Latest Records

20
Latest records at Electron Headworks
DateStationRecordValueBeat old record byOld record stoodSignificance
27 May 1980Electron Headworks, USdaily low max10.6 C (51.1 F)0.5 C (0.9 F)34 years13 of 100 (Routine)
25 May 1980Electron Headworks, USdaily low max (Tie)8.3 C (46.9 F)tie7 years1 of 100 (Routine)
24 May 1980Electron Headworks, USdaily low max (Tie)6.7 C (44.1 F)tie27 years2 of 100 (Routine)
27 April 1980Electron Headworks, USdaily high min (Tie)5.6 C (42.1 F)tie28 years2 of 100 (Routine)
27 April 1980Electron Headworks, USdaily high max (Tie)25.0 C (77.0 F)tie15 years1 of 100 (Routine)
23 April 1980Electron Headworks, USdaily high min (Tie)5.6 C (42.1 F)tie27 years2 of 100 (Routine)
19 April 1980Electron Headworks, USmonthly high min9.4 C (48.9 F)0.5 C (0.9 F)0 years14 of 100 (Routine)
13 April 1980Electron Headworks, USdaily high max23.9 C (75.0 F)1.7 C (3.1 F)33 years15 of 100 (Routine)
6 April 1980Electron Headworks, USdaily snowfall3.8 cm (1.5 in)2.5 cm (1.0 in)27 years18 of 100 (Routine)
4 April 1980Electron Headworks, USdaily high min7.8 C (46.0 F)0.6 C (1.1 F)8 years7 of 100 (Routine)
3 April 1980Electron Headworks, USmonthly high min (Tie)8.9 C (48.0 F)tie0 years3 of 100 (Routine)
21 March 1980Electron Headworks, USdaily high min4.4 C (39.9 F)1.1 C (2.0 F)33 years15 of 100 (Routine)
15 March 1980Electron Headworks, USdaily snowfall (Tie)6.4 cm (2.5 in)tie9 years1 of 100 (Routine)
3 March 1980Electron Headworks, USdaily high min5.6 C (42.1 F)1.2 C (2.2 F)30 years16 of 100 (Routine)
27 February 1980Electron Headworks, USmonthly high min10.0 C (50.0 F)1.1 C (2.0 F)22 years22 of 100 (Routine)
26 February 1980Electron Headworks, USdaily high min7.8 C (46.0 F)2.2 C (4.0 F)22 years15 of 100 (Routine)
24 February 1980Electron Headworks, USdaily high max14.4 C (57.9 F)0.5 C (0.9 F)30 years13 of 100 (Routine)
2 February 1980Electron Headworks, USdaily high min4.4 C (39.9 F)0.5 C (0.9 F)1 year4 of 100 (Routine)
28 January 1980Electron Headworks, USdaily low min (Tie)-16.1 C (3.0 F)tie8 years1 of 100 (Routine)
27 January 1980Electron Headworks, USdaily low max (Tie)-5.6 C (21.9 F)tie8 years1 of 100 (Routine)

Climate Trend

36 complete years, 1944 to 1979
Annual mean temperature at Electron Headworks as warming stripes, 1944 to 1979 One stripe for each of 36 complete years at Electron Headworks, 1944 to 1979. Blue stripes are years cooler than the station's own mean of 8.0 C (46.3 F); red stripes are warmer. The coolest year was 1955, at 6.5 C (43.6 F), and the warmest was 1958, at 9.9 C (49.7 F). The strongest colour marks a difference of 1.9 C (3.4 F). 1944: 8.7 C, +0.7 C from the station mean1945: 8.2 C, +0.2 C from the station mean1946: 7.9 C, 0.0 C from the station mean1947: 8.8 C, +0.8 C from the station mean1948: 7.3 C, -0.7 C from the station mean1949: 7.7 C, -0.3 C from the station mean1950: 7.3 C, -0.7 C from the station mean1951: 7.6 C, -0.4 C from the station mean1952: 8.1 C, +0.1 C from the station mean1953: 8.1 C, +0.2 C from the station mean1954: 7.3 C, -0.7 C from the station mean1955: 6.5 C, -1.5 C from the station mean1956: 7.8 C, -0.2 C from the station mean1957: 8.0 C, +0.1 C from the station mean1958: 9.9 C, +1.9 C from the station mean1959: 8.1 C, +0.2 C from the station mean1960: 8.1 C, +0.1 C from the station mean1961: 8.6 C, +0.6 C from the station mean1962: 8.0 C, 0.0 C from the station mean1963: 8.3 C, +0.3 C from the station mean1964: 7.1 C, -0.9 C from the station mean1965: 8.1 C, +0.2 C from the station mean1966: 8.1 C, +0.1 C from the station mean1967: 8.4 C, +0.4 C from the station mean1968: 8.3 C, +0.3 C from the station mean1969: 8.2 C, +0.3 C from the station mean1970: 8.3 C, +0.3 C from the station mean1971: 7.5 C, -0.5 C from the station mean1972: 7.3 C, -0.6 C from the station mean1973: 8.0 C, 0.0 C from the station mean1974: 8.0 C, 0.0 C from the station mean1975: 7.6 C, -0.4 C from the station mean1976: 7.7 C, -0.3 C from the station mean1977: 7.9 C, -0.1 C from the station mean1978: 8.1 C, +0.1 C from the station mean1979: 8.4 C, +0.4 C from the station mean1944195019551960196519701975
One stripe for each of 36 complete years at Electron Headworks, 1944 to 1979. Blue stripes are years cooler than the station's own mean of 8.0 C (46.3 F); red stripes are warmer. The coolest year was 1955, at 6.5 C (43.6 F), and the warmest was 1958, at 9.9 C (49.7 F). The strongest colour marks a difference of 1.9 C (3.4 F).
Annual mean temperature at Electron Headworks as warming stripes, 1944 to 1979
YearAnnual mean temperatureDifference from the station mean
19448.7 C+0.69 C
19458.2 C+0.21 C
19467.9 C-0.03 C
19478.8 C+0.84 C
19487.3 C-0.68 C
19497.7 C-0.31 C
19507.3 C-0.71 C
19517.6 C-0.36 C
19528.1 C+0.14 C
19538.1 C+0.15 C
19547.3 C-0.72 C
19556.5 C-1.52 C
19567.8 C-0.19 C
19578.0 C+0.05 C
19589.9 C+1.89 C
19598.1 C+0.15 C
19608.1 C+0.10 C
19618.6 C+0.60 C
19628.0 C-0.01 C
19638.3 C+0.29 C
19647.1 C-0.87 C
19658.1 C+0.15 C
19668.1 C+0.14 C
19678.4 C+0.44 C
19688.3 C+0.29 C
19698.2 C+0.27 C
19708.3 C+0.28 C
19717.5 C-0.51 C
19727.3 C-0.64 C
19738.0 C+0.01 C
19748.0 C+0.00 C
19757.6 C-0.38 C
19767.7 C-0.28 C
19777.9 C-0.10 C
19788.1 C+0.08 C
19798.4 C+0.38 C

The fitted trend in annual mean temperature here over 1944 to 1979 is -0.01 C (-0.20 to 0.19) per decade. The interval includes zero, so the trend is not clearly different from zero. In Fahrenheit: -0.01 F (-0.35 to 0.33) per decade. The slope is a straight line fitted to 36 complete years; the brackets give its 95 percent interval.

Fitted temperature trends per decade at Electron Headworks
MeasurePer decade (C)Per decade (F)PeriodComplete yearsReading
Annual mean temperature-0.01 C (-0.20 to 0.19) per decade-0.01 F (-0.35 to 0.33) per decade1944 to 197936Not clearly different from zero
Mean daily maximum-0.2 C (-0.4 to 0.1) per decade-0.3 F (-0.8 to 0.2) per decade1944 to 197936Not clearly different from zero
Mean daily minimum0.14 C (-0.02 to 0.31) per decade0.26 F (-0.03 to 0.55) per decade1944 to 197936Not 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

1943 to 1980
Yearly extremes at Electron Headworks: the record and the median year
MeasureRecordYear of the recordMedian yearYears with a value
Hottest day (TXx)37.8 C (100.0 F)197732.8 C (91.0 F)38
Coldest night (TNn)-21.1 C (-6.0 F)1950-14.4 C (6.1 F)38
Wettest day (Rx1day)124.2 mm (4.9 in)197767.4 mm (2.7 in)38
Wettest five days (Rx5day)253.1 mm (10.0 in)1946153.5 mm (6.0 in)38
Longest dry spell (CDD)52 days195124 days38

Hottest day (TXx)

Hottest day (TXx) at Electron Headworks by year The hottest day of the year at Electron Headworks, 1943 to 1980. The record is 37.8 C (100.0 F) in 1977, marked on the chart; the median year is 32.8 C (91.0 F). 253035401950196019701980Record: 37.8 C (100.0 F) in 1977
The hottest day of the year at Electron Headworks, 1943 to 1980. The record is 37.8 C (100.0 F) in 1977, marked on the chart; the median year is 32.8 C (91.0 F).
Hottest day (TXx) at Electron Headworks by year
YearHottest day (TXx)
194327.8 C (82.0 F)
194436.1 C (97.0 F)
194533.3 C (91.9 F)
194635.6 C (96.1 F)
194731.7 C (89.1 F)
194832.2 C (90.0 F)
194931.1 C (88.0 F)
195031.7 C (89.1 F)
195135.0 C (95.0 F)
195233.9 C (93.0 F)
195330.6 C (87.1 F)
195427.2 C (81.0 F)
195535.0 C (95.0 F)
195635.6 C (96.1 F)
195730.6 C (87.1 F)
195835.0 C (95.0 F)
195932.8 C (91.0 F)
196035.0 C (95.0 F)
196134.4 C (93.9 F)
196230.0 C (86.0 F)
196331.7 C (89.1 F)
196428.3 C (82.9 F)
196533.9 C (93.0 F)
196631.1 C (88.0 F)
196734.4 C (93.9 F)
196831.7 C (89.1 F)
196931.1 C (88.0 F)
197033.9 C (93.0 F)
197134.4 C (93.9 F)
197233.9 C (93.0 F)
197332.8 C (91.0 F)
197431.1 C (88.0 F)
197531.1 C (88.0 F)
197631.1 C (88.0 F)
197737.8 C (100.0 F)
197835.0 C (95.0 F)
197933.9 C (93.0 F)
198027.2 C (81.0 F)

Coldest night (TNn)

Coldest night (TNn) at Electron Headworks by year The coldest night of the year at Electron Headworks, 1943 to 1980. The record is -21.1 C (-6.0 F) in 1950, marked on the chart; the median year is -14.4 C (6.1 F). -25-20-15-10-501950196019701980Record: -21.1 C (-6.0 F) in 1950
The coldest night of the year at Electron Headworks, 1943 to 1980. The record is -21.1 C (-6.0 F) in 1950, marked on the chart; the median year is -14.4 C (6.1 F).
Coldest night (TNn) at Electron Headworks by year
YearColdest night (TNn)
1943-4.4 C (24.1 F)
1944-10.0 C (14.0 F)
1945-8.3 C (17.1 F)
1946-8.9 C (16.0 F)
1947-16.1 C (3.0 F)
1948-12.2 C (10.0 F)
1949-16.7 C (1.9 F)
1950-21.1 C (-6.0 F)
1951-14.4 C (6.1 F)
1952-14.4 C (6.1 F)
1953-7.2 C (19.0 F)
1954-15.0 C (5.0 F)
1955-18.9 C (-2.0 F)
1956-17.2 C (1.0 F)
1957-18.3 C (-0.9 F)
1958-7.8 C (18.0 F)
1959-15.6 C (3.9 F)
1960-10.6 C (12.9 F)
1961-9.4 C (15.1 F)
1962-14.4 C (6.1 F)
1963-14.4 C (6.1 F)
1964-17.2 C (1.0 F)
1965-8.9 C (16.0 F)
1966-8.3 C (17.1 F)
1967-9.4 C (15.1 F)
1968-15.6 C (3.9 F)
1969-14.4 C (6.1 F)
1970-10.0 C (14.0 F)
1971-13.3 C (8.1 F)
1972-19.4 C (-2.9 F)
1973-16.1 C (3.0 F)
1974-15.6 C (3.9 F)
1975-9.4 C (15.1 F)
1976-10.0 C (14.0 F)
1977-13.3 C (8.1 F)
1978-18.3 C (-0.9 F)
1979-18.3 C (-0.9 F)
1980-16.7 C (1.9 F)

Wettest day (Rx1day)

Wettest day (Rx1day) at Electron Headworks by year The wettest day of the year at Electron Headworks, 1943 to 1980. The record is 124.2 mm (4.9 in) in 1977, marked on the chart; the median year is 67.4 mm (2.7 in). 2550751001251950196019701980Record: 124.2 mm (4.9 in) in 1977
The wettest day of the year at Electron Headworks, 1943 to 1980. The record is 124.2 mm (4.9 in) in 1977, marked on the chart; the median year is 67.4 mm (2.7 in).
Wettest day (Rx1day) at Electron Headworks by year
YearWettest day (Rx1day)
194353.6 mm (2.1 in)
194435.8 mm (1.4 in)
194561.5 mm (2.4 in)
194694.5 mm (3.7 in)
194771.1 mm (2.8 in)
194866.8 mm (2.6 in)
194974.9 mm (2.9 in)
1950104.6 mm (4.1 in)
195164.5 mm (2.5 in)
195261.2 mm (2.4 in)
195380.0 mm (3.1 in)
195447.5 mm (1.9 in)
195571.9 mm (2.8 in)
195659.4 mm (2.3 in)
195777.0 mm (3.0 in)
195881.3 mm (3.2 in)
195987.6 mm (3.4 in)
196059.2 mm (2.3 in)
196173.2 mm (2.9 in)
1962113.3 mm (4.5 in)
196350.8 mm (2.0 in)
196487.9 mm (3.5 in)
196585.9 mm (3.4 in)
196658.4 mm (2.3 in)
196764.8 mm (2.6 in)
196869.6 mm (2.7 in)
196954.9 mm (2.2 in)
197068.1 mm (2.7 in)
197174.4 mm (2.9 in)
197287.1 mm (3.4 in)
197330.7 mm (1.2 in)
197466.0 mm (2.6 in)
197556.9 mm (2.2 in)
197652.1 mm (2.1 in)
1977124.2 mm (4.9 in)
197839.4 mm (1.6 in)
197996.8 mm (3.8 in)
198031.0 mm (1.2 in)

Wettest five days (Rx5day)

Wettest five days (Rx5day) at Electron Headworks by year The wettest five days of the year at Electron Headworks, 1943 to 1980. The record is 253.1 mm (10.0 in) in 1946, marked on the chart; the median year is 153.5 mm (6.0 in). 501001502002503001950196019701980Record: 253.1 mm (10.0 in) in 1946
The wettest five days of the year at Electron Headworks, 1943 to 1980. The record is 253.1 mm (10.0 in) in 1946, marked on the chart; the median year is 153.5 mm (6.0 in).
Wettest five days (Rx5day) at Electron Headworks by year
YearWettest five days (Rx5day)
1943132.3 mm (5.2 in)
194490.7 mm (3.6 in)
1945152.2 mm (6.0 in)
1946253.1 mm (10.0 in)
1947182.3 mm (7.2 in)
1948175.3 mm (6.9 in)
1949168.6 mm (6.6 in)
1950157.7 mm (6.2 in)
1951167.4 mm (6.6 in)
195294.3 mm (3.7 in)
1953188.3 mm (7.4 in)
1954120.1 mm (4.7 in)
1955154.7 mm (6.1 in)
1956135.3 mm (5.3 in)
1957128.0 mm (5.0 in)
1958196.3 mm (7.7 in)
1959190.3 mm (7.5 in)
1960135.2 mm (5.3 in)
1961171.9 mm (6.8 in)
1962149.5 mm (5.9 in)
1963113.5 mm (4.5 in)
1964160.5 mm (6.3 in)
1965235.2 mm (9.3 in)
1966122.6 mm (4.8 in)
1967134.9 mm (5.3 in)
1968124.7 mm (4.9 in)
1969129.8 mm (5.1 in)
1970143.3 mm (5.6 in)
1971230.6 mm (9.1 in)
1972175.2 mm (6.9 in)
197380.4 mm (3.2 in)
1974154.7 mm (6.1 in)
1975170.9 mm (6.7 in)
1976105.7 mm (4.2 in)
1977182.9 mm (7.2 in)
1978110.8 mm (4.4 in)
1979172.3 mm (6.8 in)
198081.3 mm (3.2 in)

Longest dry spell (CDD)

Longest dry spell (CDD) at Electron Headworks by year The longest dry spell of the year at Electron Headworks, 1943 to 1980. The record is 52 days in 1951, marked on the chart; the median year is 24 days. 02040601950196019701980Record: 52 days in 1951
The longest dry spell of the year at Electron Headworks, 1943 to 1980. The record is 52 days in 1951, marked on the chart; the median year is 24 days.
Longest dry spell (CDD) at Electron Headworks by year
YearLongest dry spell (CDD)
194314 days
194421 days
194523 days
194623 days
194717 days
194813 days
194920 days
195029 days
195152 days
195238 days
195321 days
195413 days
195543 days
195627 days
195727 days
195833 days
195923 days
196035 days
196127 days
196226 days
196320 days
19647 days
196524 days
196623 days
196742 days
196824 days
196923 days
197025 days
197140 days
197232 days
197341 days
197430 days
197517 days
197624 days
197735 days
197814 days
197932 days
198010 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

36 years with a frost

Across 36 years with a frost, the median last spring frost at Electron Headworks falls on 25 May and the median first autumn frost on 22 September, which leaves a median of 121 days between them.

Fitted over all years, the growing season changes by +4.9 days per decade at this station.

Frost dates and growing season at Electron Headworks
MeasureMedian, all yearsEarliest periodRecent period (1950 to 1979)Recent against earliestFitted trend
Last spring frost25 Mayn/a26 Mayn/a+2.7 days per decade
First autumn frost22 Septembern/a22 Septembern/a+7.6 days per decade
Growing days121 daysn/a122 daysn/a+4.9 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

36 years, 1944 to 1979

A day with at least 69.0 mm (2.7 in) of rain is expected about once in 2 years. A day with at least 126.1 mm (5.0 in) of rain is expected about once in 100 years.

Rainfall return levels at Electron Headworks: the daily rain expected about once in a given number of years
Expected about once inA day with at leastNote
2 years69.0 mm (2.7 in)
5 years87.6 mm (3.4 in)
10 years98.4 mm (3.9 in)
25 years110.6 mm (4.4 in)
50 years118.7 mm (4.7 in)Longer than the 36 years of record
100 years126.1 mm (5.0 in)Longer than the 36 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, 36 years of values from 1944 to 1979.

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: 124.2 mm (4.9 in) in 1977; 113.3 mm (4.5 in) in 1962; 104.6 mm (4.1 in) in 1950.

Download the Data

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