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Dartmouth Reservoir Weather Records (ASN00082076)

Record envelope, standing records and threshold days for Dartmouth Reservoir (ASN00082076), Australia, with 109 years of record.

Key Facts for Dartmouth Reservoir

  • Dartmouth Reservoir (ASN00082076) is a weather station in Australia at -36.54 latitude and 147.50 longitude, 365 m (1,198 ft) above sea level.
  • The station reports from 1918 to 2026, 109 years of record.
  • 1,464 records set at Dartmouth Reservoir still stand.
  • Records are tracked for tmax, tmin, prcp: an element needs 30 years of data to be eligible.
  • Dartmouth Reservoir set a daily record high minimum temperature of 13.0 C (55.4 F) on 26 September 2026 (provisional).

Provisional Records

Records set in the last 60 days are provisional until they clear the revision window.

About the Station

  • Location: Australia, -36.54 latitude, 147.50 longitude.
  • Elevation: 365 m (1,198 ft).
  • Period of record: 1918 to 2026, 109 years.
  • Eligible elements: tmax, tmin, prcp.

Daily Record Envelope and 2026

12 days at or beyond a record
Daily record high and record low at Dartmouth Reservoir, with 2026 drawn through them The band shows the record high and record low for each calendar day at Dartmouth Reservoir. The lines show the 2026 daily maximum and minimum. 12 days in 2026 matched or passed a record. Temperatures are in degrees Celsius. -1001020304050 JanFebMarAprMayJunJulAugSepOctNovDec
The band shows the record high and record low for each calendar day at Dartmouth Reservoir. The lines show the 2026 daily maximum and minimum. 12 days in 2026 matched or passed a record. Temperatures are in degrees Celsius.
Daily record high and record low at Dartmouth Reservoir, with 2026 drawn through them
MonthHighest record highLowest record low2026 highest maximum2026 lowest minimum
Jan42.2 C (108.0 F)2.8 C (37.0 F)41.0 C (105.8 F)9.0 C (48.2 F)
Feb43.0 C (109.4 F)2.3 C (36.1 F)35.4 C (95.7 F)5.0 C (41.0 F)
Mar39.0 C (102.2 F)1.9 C (35.4 F)30.3 C (86.5 F)5.0 C (41.0 F)
Apr33.4 C (92.1 F)-1.6 C (29.1 F)26.5 C (79.7 F)2.0 C (35.6 F)
May26.4 C (79.5 F)-3.5 C (25.7 F)21.5 C (70.7 F)2.0 C (35.6 F)
Jun20.0 C (68.0 F)-5.1 C (22.8 F)18.9 C (66.0 F)0.3 C (32.5 F)
Jul19.6 C (67.3 F)-5.4 C (22.3 F)16.5 C (61.7 F)-2.0 C (28.4 F)
Aug27.2 C (81.0 F)-5.0 C (23.0 F)21.5 C (70.7 F)-1.5 C (29.3 F)
Sep28.5 C (83.3 F)-3.7 C (25.3 F)25.5 C (77.9 F)3.5 C (38.3 F)
Oct33.2 C (91.8 F)-1.5 C (29.3 F)n/a11.5 C (52.7 F)
Nov37.9 C (100.2 F)-0.2 C (31.6 F)n/an/a
Dec39.2 C (102.6 F)1.4 C (34.5 F)n/an/a

Which Years Hold Standing Records

1,464 standing records
Standing records at Dartmouth Reservoir by the year they were set 1,464 records at Dartmouth Reservoir still stand. 1983 holds the most, with 48. 02040601975: 351976: 201977: 271978: 271979: 231980: 351981: 251982: 391983: 481984: 291985: 251986: 331987: 251988: 441989: 281990: 301991: 261992: 261993: 251994: 401995: 421996: 241997: 271998: 351999: 242000: 212001: 272002: 242003: 232004: 192005: 282006: 362007: 152008: 282009: 392010: 252011: 232012: 212013: 392014: 282015: 212016: 302017: 292018: 352019: 412020: 162021: 192022: 232023: 142024: 282025: 272026: 23197519811987199319992005201120172023
1,464 records at Dartmouth Reservoir still stand. 1983 holds the most, with 48.
Standing records at Dartmouth Reservoir by the year they were set
Year setStanding records
197535
197620
197727
197827
197923
198035
198125
198239
198348
198429
198525
198633
198725
198844
198928
199030
199126
199226
199325
199440
199542
199624
199727
199835
199924
200021
200127
200224
200323
200419
200528
200636
200715
200828
200939
201025
201123
201221
201339
201428
201521
201630
201729
201835
201941
202016
202119
202223
202314
202428
202527
202623

All-Time Record Progression

2 new records
When Dartmouth Reservoir set new all-time records 2 all-time records were set at Dartmouth Reservoir between 2 July 2017 and 26 January 2019. Each dot is a new record. Record low minimum temperatureRecord high minimum temperature2 July 2017: Record low minimum temperature -5.4 C (22.3 F)26 January 2019: Record high minimum temperature 25.1 C (77.2 F)2020
2 all-time records were set at Dartmouth Reservoir between 2 July 2017 and 26 January 2019. Each dot is a new record.
When Dartmouth Reservoir set new all-time records
DateKindDetail
2017-07-02Record low minimum temperatureRecord low minimum temperature -5.4 C (22.3 F)
2019-01-26Record high minimum temperatureRecord high minimum temperature 25.1 C (77.2 F)

Wettest Day of Each Month

Oct: 104.1 mm (4.1 in)
Record daily precipitation for each month at Dartmouth Reservoir The wettest day on record for each calendar month at Dartmouth Reservoir. The most was 104.1 mm (4.1 in) on 2 October 1927. 050100150 Jan: 85.0 mm (3.3 in), 15 January 2022 Jan Feb: 99.1 mm (3.9 in), 27 February 1939 Feb Mar: 70.8 mm (2.8 in), 4 March 2012 Mar Apr: 57.0 mm (2.2 in), 14 April 1990 Apr May: 91.2 mm (3.6 in), 13 May 1918 May Jun: 54.4 mm (2.1 in), 11 June 1920 Jun Jul: 66.6 mm (2.6 in), 23 July 1978 Jul Aug: 91.6 mm (3.6 in), 26 August 1983 Aug Sep: 76.7 mm (3.0 in), 10 September 1921 Sep Oct: 104.1 mm (4.1 in), 2 October 1927 Oct Nov: 70.8 mm (2.8 in), 28 November 2024 Nov Dec: 97.3 mm (3.8 in), 25 December 1919 Dec
The wettest day on record for each calendar month at Dartmouth Reservoir. The most was 104.1 mm (4.1 in) on 2 October 1927.
Record daily precipitation for each month at Dartmouth Reservoir
MonthRecord daily precipitation (mm)Date
Jan85.0 mm (3.3 in)15 January 2022
Feb99.1 mm (3.9 in)27 February 1939
Mar70.8 mm (2.8 in)4 March 2012
Apr57.0 mm (2.2 in)14 April 1990
May91.2 mm (3.6 in)13 May 1918
Jun54.4 mm (2.1 in)11 June 1920
Jul66.6 mm (2.6 in)23 July 1978
Aug91.6 mm (3.6 in)26 August 1983
Sep76.7 mm (3.0 in)10 September 1921
Oct104.1 mm (4.1 in)2 October 1927
Nov70.8 mm (2.8 in)28 November 2024
Dec97.3 mm (3.8 in)25 December 1919

Period of Record Coverage

1975 to 2026
Days with data per year at Dartmouth Reservoir 52 years of record at Dartmouth Reservoir, 1975 to 2026. 18 years have data for under 90 percent of days and are left out of rankings: 1975, 1977, 1979, 1998, 2003, 2004, 2005, 2006 and others. 1975: 325 of 365 days1976: 338 of 366 days1977: 325 of 365 days1978: 353 of 365 days1979: 307 of 365 days1980: 334 of 366 days1981: 365 of 365 days1982: 365 of 365 days1983: 365 of 365 days1984: 366 of 366 days1985: 363 of 365 days1986: 356 of 365 days1987: 357 of 365 days1988: 351 of 366 days1989: 354 of 365 days1990: 365 of 365 days1991: 365 of 365 days1992: 366 of 366 days1993: 365 of 365 days1994: 363 of 365 days1995: 364 of 365 days1996: 366 of 366 days1997: 350 of 365 days1998: 315 of 365 days1999: 340 of 365 days2000: 337 of 366 days2001: 341 of 365 days2002: 336 of 365 days2003: 322 of 365 days2004: 306 of 366 days2005: 326 of 365 days2006: 322 of 365 days2007: 297 of 365 days2008: 347 of 366 days2009: 339 of 365 days2010: 345 of 365 days2011: 356 of 365 days2012: 337 of 366 days2013: 302 of 365 days2014: 336 of 365 days2015: 347 of 365 days2016: 346 of 366 days2017: 326 of 365 days2018: 337 of 365 days2019: 332 of 365 days2020: 198 of 366 days2021: 317 of 365 days2022: 315 of 365 days2023: 280 of 365 days2024: 276 of 366 days2025: 294 of 365 days2026: 246 of 365 days19801990200020102020
52 years of record at Dartmouth Reservoir, 1975 to 2026. 18 years have data for under 90 percent of days and are left out of rankings: 1975, 1977, 1979, 1998, 2003, 2004, 2005, 2006 and others.
Days with data per year at Dartmouth Reservoir
YearDays with dataShare of yearComplete
197532589%No
197633892%Yes
197732589%No
197835397%Yes
197930784%No
198033491%Yes
1981365100%Yes
1982365100%Yes
1983365100%Yes
1984366100%Yes
198536399%Yes
198635698%Yes
198735798%Yes
198835196%Yes
198935497%Yes
1990365100%Yes
1991365100%Yes
1992366100%Yes
1993365100%Yes
199436399%Yes
1995364100%Yes
1996366100%Yes
199735096%Yes
199831586%No
199934093%Yes
200033792%Yes
200134193%Yes
200233692%Yes
200332288%No
200430684%No
200532689%No
200632288%No
200729781%No
200834795%Yes
200933993%Yes
201034595%Yes
201135698%Yes
201233792%Yes
201330283%No
201433692%Yes
201534795%Yes
201634695%Yes
201732689%No
201833792%Yes
201933291%Yes
202019854%No
202131787%No
202231586%No
202328077%No
202427675%No
202529481%No
202624667%No

Latest Records

20
Latest records at Dartmouth Reservoir
DateStationRecordValueBeat old record byOld record stoodSignificance
26 September 2026Dartmouth Reservoir, AUdaily high min (Provisional)13.0 C (55.4 F)0.4 C (0.7 F)36 years16 of 100 (Routine)
25 September 2026Dartmouth Reservoir, AUdaily high min (Provisional)12.5 C (54.5 F)0.5 C (0.9 F)20 years12 of 100 (Routine)
20 September 2026Dartmouth Reservoir, AUdaily high max (Provisional)24.0 C (75.2 F)0.8 C (1.4 F)7 years9 of 100 (Routine)
15 September 2026Dartmouth Reservoir, AUdaily high min (Provisional)10.0 C (50.0 F)0.8 C (1.4 F)21 years13 of 100 (Routine)
6 September 2026Dartmouth Reservoir, AUdaily rain (Provisional)39.0 mm (1.5 in)15.8 mm (0.6 in)43 years37 of 100 (Notable)
3 September 2026Dartmouth Reservoir, AUdaily high min (Provisional)11.5 C (52.7 F)1.8 C (3.2 F)28 years18 of 100 (Routine)
31 August 2026Dartmouth Reservoir, AUdaily high max (Provisional)21.5 C (70.7 F)0.1 C (0.2 F)27 years13 of 100 (Routine)
26 August 2026Dartmouth Reservoir, AUdaily high min (Provisional)11.1 C (52.0 F)1.1 C (2.0 F)1 year8 of 100 (Routine)
21 August 2026Dartmouth Reservoir, AUdaily high min (Provisional)9.6 C (49.3 F)1.6 C (2.9 F)45 years23 of 100 (Routine)
10 August 2026Dartmouth Reservoir, AUdaily rain74.0 mm (2.9 in)33.0 mm (1.3 in)41 years55 of 100 (Notable)
1 August 2026Dartmouth Reservoir, AUdaily low min-1.0 C (30.2 F)0.3 C (0.5 F)28 years14 of 100 (Routine)
19 July 2026Dartmouth Reservoir, AUdaily high max16.5 C (61.7 F)0.5 C (0.9 F)12 years10 of 100 (Routine)
16 July 2026Dartmouth Reservoir, AUdaily high max16.0 C (60.8 F)0.6 C (1.1 F)40 years19 of 100 (Routine)
14 July 2026Dartmouth Reservoir, AUdaily high min9.5 C (49.1 F)0.6 C (1.1 F)27 years15 of 100 (Routine)
2 July 2026Dartmouth Reservoir, AUdaily rain34.8 mm (1.4 in)8.9 mm (0.35 in)103 years49 of 100 (Notable)
2 July 2026Dartmouth Reservoir, AUdaily high min9.2 C (48.6 F)1.4 C (2.5 F)16 years14 of 100 (Routine)
1 July 2026Dartmouth Reservoir, AUdaily high min10.8 C (51.4 F)2.3 C (4.1 F)20 years18 of 100 (Routine)
19 June 2026Dartmouth Reservoir, AUdaily high min9.5 C (49.1 F)1.5 C (2.7 F)27 years17 of 100 (Routine)
18 June 2026Dartmouth Reservoir, AUdaily high min10.5 C (50.9 F)1.5 C (2.7 F)11 years12 of 100 (Routine)
18 June 2026Dartmouth Reservoir, AUdaily high max (Tie)16.0 C (60.8 F)tie9 years1 of 100 (Routine)

Climate Trend

40 complete years, 1976 to 2025
Annual mean temperature at Dartmouth Reservoir as warming stripes, 1976 to 2025 One stripe for each of 40 complete years at Dartmouth Reservoir, 1976 to 2025. Blue stripes are years cooler than the station's own mean of 14.1 C (57.4 F); red stripes are warmer. The coolest year was 1996, at 13.1 C (55.5 F), and the warmest was 2007, at 15.0 C (59.1 F). The strongest colour marks a difference of 1.1 C (2.0 F). 1976: 13.2 C, -0.9 C from the station mean1977: 13.4 C, -0.6 C from the station mean1978: 13.9 C, -0.2 C from the station mean1979: 14.0 C, -0.1 C from the station mean1980: 14.3 C, +0.2 C from the station mean1981: 14.3 C, +0.2 C from the station mean1982: 14.2 C, +0.2 C from the station mean1983: 14.5 C, +0.4 C from the station mean1984: 13.3 C, -0.7 C from the station mean1985: 14.1 C, 0.0 C from the station mean1986: 13.7 C, -0.4 C from the station mean1987: 13.8 C, -0.3 C from the station mean1988: 14.7 C, +0.6 C from the station mean1989: 14.1 C, 0.0 C from the station mean1990: 14.3 C, +0.2 C from the station mean1991: 14.0 C, -0.1 C from the station mean1992: 13.3 C, -0.8 C from the station mean1993: 13.6 C, -0.5 C from the station mean1994: 13.3 C, -0.8 C from the station mean1995: 13.3 C, -0.8 C from the station mean1996: 13.1 C, -1.0 C from the station mean1997: 14.3 C, +0.2 C from the station mean1999: 14.3 C, +0.2 C from the station mean2000: 13.6 C, -0.5 C from the station mean2001: 14.1 C, 0.0 C from the station mean2002: 14.2 C, +0.1 C from the station mean2005: 13.9 C, -0.2 C from the station mean2006: 14.7 C, +0.6 C from the station mean2007: 15.0 C, +0.9 C from the station mean2008: 13.9 C, -0.2 C from the station mean2009: 14.8 C, +0.7 C from the station mean2010: 14.2 C, +0.1 C from the station mean2011: 14.3 C, +0.2 C from the station mean2012: 13.9 C, -0.2 C from the station mean2014: 15.0 C, +0.9 C from the station mean2015: 14.7 C, +0.6 C from the station mean2016: 14.8 C, +0.7 C from the station mean2017: 14.3 C, +0.2 C from the station mean2019: 14.8 C, +0.8 C from the station mean2025: 14.8 C, +0.7 C from the station mean19761980198519901995200020052010201520202025
One stripe for each of 40 complete years at Dartmouth Reservoir, 1976 to 2025. Blue stripes are years cooler than the station's own mean of 14.1 C (57.4 F); red stripes are warmer. The coolest year was 1996, at 13.1 C (55.5 F), and the warmest was 2007, at 15.0 C (59.1 F). The strongest colour marks a difference of 1.1 C (2.0 F).
Annual mean temperature at Dartmouth Reservoir as warming stripes, 1976 to 2025
YearAnnual mean temperatureDifference from the station mean
197613.2 C-0.89 C
197713.4 C-0.65 C
197813.9 C-0.24 C
197914.0 C-0.13 C
198014.3 C+0.19 C
198114.3 C+0.21 C
198214.2 C+0.15 C
198314.5 C+0.36 C
198413.3 C-0.75 C
198514.1 C+0.03 C
198613.7 C-0.38 C
198713.8 C-0.29 C
198814.7 C+0.57 C
198914.1 C-0.04 C
199014.3 C+0.16 C
199114.0 C-0.08 C
199213.3 C-0.77 C
199313.6 C-0.47 C
199413.3 C-0.81 C
199513.3 C-0.78 C
199613.1 C-1.02 C
199714.3 C+0.17 C
199914.3 C+0.20 C
200013.6 C-0.48 C
200114.1 C-0.01 C
200214.2 C+0.13 C
200513.9 C-0.23 C
200614.7 C+0.56 C
200715.0 C+0.94 C
200813.9 C-0.19 C
200914.8 C+0.67 C
201014.2 C+0.10 C
201114.3 C+0.22 C
201213.9 C-0.21 C
201415.0 C+0.86 C
201514.7 C+0.60 C
201614.8 C+0.66 C
201714.3 C+0.20 C
201914.8 C+0.75 C
202514.8 C+0.67 C

The annual mean temperature here has risen by 0.2 C (0.1 to 0.3) per decade over 1976 to 2025. In Fahrenheit: 0.4 F (0.2 to 0.6) per decade. The slope is a straight line fitted to 40 complete years; the brackets give its 95 percent interval.

Fitted temperature trends per decade at Dartmouth Reservoir
MeasurePer decade (C)Per decade (F)PeriodComplete yearsReading
Annual mean temperature0.2 C (0.1 to 0.3) per decade0.4 F (0.2 to 0.6) per decade1976 to 202540Rise
Mean daily maximum0.18 C (0.01 to 0.36) per decade0.33 F (0.02 to 0.64) per decade1976 to 202540Rise
Mean daily minimum0.2 C (0.1 to 0.3) per decade0.4 F (0.2 to 0.6) per decade1976 to 202540Rise

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

1918 to 2026
Yearly extremes at Dartmouth Reservoir: the record and the median year
MeasureRecordYear of the recordMedian yearYears with a value
Hottest day (TXx)43.0 C (109.4 F)200438.2 C (100.7 F)52
Coldest night (TNn)-5.4 C (22.3 F)2017-3.0 C (26.6 F)52
Wettest day (Rx1day)104.1 mm (4.1 in)192758.4 mm (2.3 in)76
Wettest five days (Rx5day)202.0 mm (8.0 in)193995.2 mm (3.7 in)76
Longest dry spell (CDD)60 days192625 days76

Hottest day (TXx)

Hottest day (TXx) at Dartmouth Reservoir by year The hottest day of the year at Dartmouth Reservoir, 1918 to 2026. The record is 43.0 C (109.4 F) in 2004, marked on the chart; the median year is 38.2 C (100.7 F). 32.53537.54042.545192019401960198020002020Record: 43.0 C (109.4 F) in 2004
The hottest day of the year at Dartmouth Reservoir, 1918 to 2026. The record is 43.0 C (109.4 F) in 2004, marked on the chart; the median year is 38.2 C (100.7 F).
Hottest day (TXx) at Dartmouth Reservoir by year
YearHottest day (TXx)
1918n/a
1919n/a
1920n/a
1921n/a
1922n/a
1923n/a
1924n/a
1925n/a
1926n/a
1927n/a
1928n/a
1929n/a
1930n/a
1931n/a
1932n/a
1933n/a
1934n/a
1935n/a
1936n/a
1937n/a
1938n/a
1939n/a
1941n/a
1974n/a
197535.7 C (96.3 F)
197634.8 C (94.6 F)
197737.3 C (99.1 F)
197838.2 C (100.8 F)
197939.1 C (102.4 F)
198038.8 C (101.8 F)
198138.6 C (101.5 F)
198239.0 C (102.2 F)
198341.3 C (106.3 F)
198433.1 C (91.6 F)
198539.2 C (102.6 F)
198635.8 C (96.4 F)
198738.7 C (101.7 F)
198839.4 C (102.9 F)
198933.9 C (93.0 F)
199038.7 C (101.7 F)
199137.3 C (99.1 F)
199237.2 C (99.0 F)
199335.3 C (95.5 F)
199436.1 C (97.0 F)
199534.9 C (94.8 F)
199636.7 C (98.1 F)
199737.0 C (98.6 F)
199838.0 C (100.4 F)
199938.1 C (100.6 F)
200037.6 C (99.7 F)
200136.4 C (97.5 F)
200237.4 C (99.3 F)
200339.0 C (102.2 F)
200443.0 C (109.4 F)
200538.5 C (101.3 F)
200639.3 C (102.7 F)
200740.2 C (104.4 F)
200837.7 C (99.9 F)
200941.8 C (107.2 F)
201038.4 C (101.1 F)
201137.1 C (98.8 F)
201235.7 C (96.3 F)
201340.5 C (104.9 F)
201441.0 C (105.8 F)
201538.2 C (100.8 F)
201639.1 C (102.4 F)
201736.8 C (98.2 F)
201839.0 C (102.2 F)
201940.9 C (105.6 F)
202042.2 C (108.0 F)
202137.4 C (99.3 F)
202235.0 C (95.0 F)
202334.9 C (94.8 F)
202436.0 C (96.8 F)
202538.5 C (101.3 F)
202641.0 C (105.8 F)

Coldest night (TNn)

Coldest night (TNn) at Dartmouth Reservoir by year The coldest night of the year at Dartmouth Reservoir, 1918 to 2026. The record is -5.4 C (22.3 F) in 2017, marked on the chart; the median year is -3.0 C (26.6 F). -6-5-4-3-2-1192019401960198020002020Record: -5.4 C (22.3 F) in 2017
The coldest night of the year at Dartmouth Reservoir, 1918 to 2026. The record is -5.4 C (22.3 F) in 2017, marked on the chart; the median year is -3.0 C (26.6 F).
Coldest night (TNn) at Dartmouth Reservoir by year
YearColdest night (TNn)
1918n/a
1919n/a
1920n/a
1921n/a
1922n/a
1923n/a
1924n/a
1925n/a
1926n/a
1927n/a
1928n/a
1929n/a
1930n/a
1931n/a
1932n/a
1933n/a
1934n/a
1935n/a
1936n/a
1937n/a
1938n/a
1939n/a
1941n/a
1974n/a
1975-2.8 C (27.0 F)
1976-5.0 C (23.0 F)
1977-4.6 C (23.7 F)
1978-2.4 C (27.7 F)
1979-2.4 C (27.7 F)
1980-2.5 C (27.5 F)
1981-3.0 C (26.6 F)
1982-4.5 C (23.9 F)
1983-3.5 C (25.7 F)
1984-3.0 C (26.6 F)
1985-3.7 C (25.3 F)
1986-5.2 C (22.6 F)
1987-3.0 C (26.6 F)
1988-1.7 C (28.9 F)
1989-3.5 C (25.7 F)
1990-1.8 C (28.8 F)
1991-3.2 C (26.2 F)
1992-3.6 C (25.5 F)
1993-1.9 C (28.6 F)
1994-4.3 C (24.3 F)
1995-4.5 C (23.9 F)
1996-3.3 C (26.1 F)
1997-3.3 C (26.1 F)
1998-3.1 C (26.4 F)
1999-3.5 C (25.7 F)
2000-2.0 C (28.4 F)
2001-2.4 C (27.7 F)
2002-2.8 C (27.0 F)
2003-1.5 C (29.3 F)
2004-3.0 C (26.6 F)
2005-2.8 C (27.0 F)
2006-5.0 C (23.0 F)
2007-4.1 C (24.6 F)
2008-2.5 C (27.5 F)
2009-4.1 C (24.6 F)
2010-2.2 C (28.0 F)
2011-2.4 C (27.7 F)
2012-2.4 C (27.7 F)
2013-1.5 C (29.3 F)
2014-3.9 C (25.0 F)
2015-3.2 C (26.2 F)
2016-2.6 C (27.3 F)
2017-5.4 C (22.3 F)
2018-3.4 C (25.9 F)
2019-2.0 C (28.4 F)
2020-2.5 C (27.5 F)
2021-2.0 C (28.4 F)
2022-3.0 C (26.6 F)
2023-2.5 C (27.5 F)
2024-3.2 C (26.2 F)
2025-5.1 C (22.8 F)
2026-2.0 C (28.4 F)

Wettest day (Rx1day)

Wettest day (Rx1day) at Dartmouth Reservoir by year The wettest day of the year at Dartmouth Reservoir, 1918 to 2026. The record is 104.1 mm (4.1 in) in 1927, marked on the chart; the median year is 58.4 mm (2.3 in). 0255075100125192019401960198020002020Record: 104.1 mm (4.1 in) in 1927
The wettest day of the year at Dartmouth Reservoir, 1918 to 2026. The record is 104.1 mm (4.1 in) in 1927, marked on the chart; the median year is 58.4 mm (2.3 in).
Wettest day (Rx1day) at Dartmouth Reservoir by year
YearWettest day (Rx1day)
191891.2 mm (3.6 in)
191997.3 mm (3.8 in)
192057.9 mm (2.3 in)
192176.7 mm (3.0 in)
192245.2 mm (1.8 in)
192350.0 mm (2.0 in)
192477.5 mm (3.1 in)
192555.1 mm (2.2 in)
192661.7 mm (2.4 in)
1927104.1 mm (4.1 in)
192864.3 mm (2.5 in)
192948.3 mm (1.9 in)
193053.8 mm (2.1 in)
193163.5 mm (2.5 in)
193258.4 mm (2.3 in)
193363.8 mm (2.5 in)
193453.3 mm (2.1 in)
193567.1 mm (2.6 in)
193640.6 mm (1.6 in)
193749.8 mm (2.0 in)
193843.9 mm (1.7 in)
193999.1 mm (3.9 in)
194122.1 mm (0.9 in)
197472.2 mm (2.8 in)
197561.3 mm (2.4 in)
197634.4 mm (1.4 in)
197745.6 mm (1.8 in)
197866.6 mm (2.6 in)
197942.5 mm (1.7 in)
198061.4 mm (2.4 in)
198148.4 mm (1.9 in)
198246.0 mm (1.8 in)
198391.6 mm (3.6 in)
198460.4 mm (2.4 in)
198542.8 mm (1.7 in)
198662.0 mm (2.4 in)
198743.0 mm (1.7 in)
198865.2 mm (2.6 in)
198959.2 mm (2.3 in)
199057.0 mm (2.2 in)
199165.6 mm (2.6 in)
199253.2 mm (2.1 in)
199368.6 mm (2.7 in)
199452.4 mm (2.1 in)
199560.4 mm (2.4 in)
199655.6 mm (2.2 in)
199745.6 mm (1.8 in)
199858.4 mm (2.3 in)
199963.8 mm (2.5 in)
200061.2 mm (2.4 in)
200166.0 mm (2.6 in)
200248.4 mm (1.9 in)
200366.6 mm (2.6 in)
200443.4 mm (1.7 in)
200552.8 mm (2.1 in)
200640.0 mm (1.6 in)
200746.8 mm (1.8 in)
200839.2 mm (1.5 in)
200948.4 mm (1.9 in)
201081.6 mm (3.2 in)
201183.2 mm (3.3 in)
201270.8 mm (2.8 in)
201349.6 mm (2.0 in)
201448.0 mm (1.9 in)
201549.8 mm (2.0 in)
201657.2 mm (2.3 in)
201769.6 mm (2.7 in)
201828.2 mm (1.1 in)
201982.0 mm (3.2 in)
202043.8 mm (1.7 in)
202194.8 mm (3.7 in)
202285.0 mm (3.3 in)
202355.0 mm (2.2 in)
202470.8 mm (2.8 in)
202586.8 mm (3.4 in)
202674.0 mm (2.9 in)

Wettest five days (Rx5day)

Wettest five days (Rx5day) at Dartmouth Reservoir by year The wettest five days of the year at Dartmouth Reservoir, 1918 to 2026. The record is 202.0 mm (8.0 in) in 1939, marked on the chart; the median year is 95.2 mm (3.7 in). 050100150200250192019401960198020002020Record: 202.0 mm (8.0 in) in 1939
The wettest five days of the year at Dartmouth Reservoir, 1918 to 2026. The record is 202.0 mm (8.0 in) in 1939, marked on the chart; the median year is 95.2 mm (3.7 in).
Wettest five days (Rx5day) at Dartmouth Reservoir by year
YearWettest five days (Rx5day)
1918191.2 mm (7.5 in)
1919173.8 mm (6.8 in)
1920106.5 mm (4.2 in)
1921101.1 mm (4.0 in)
192296.5 mm (3.8 in)
192390.9 mm (3.6 in)
1924128.8 mm (5.1 in)
1925114.0 mm (4.5 in)
1926105.2 mm (4.1 in)
1927147.3 mm (5.8 in)
1928108.9 mm (4.3 in)
192977.7 mm (3.1 in)
193096.3 mm (3.8 in)
1931107.3 mm (4.2 in)
1932100.8 mm (4.0 in)
1933114.3 mm (4.5 in)
1934125.2 mm (4.9 in)
193578.1 mm (3.1 in)
193678.4 mm (3.1 in)
193787.1 mm (3.4 in)
193873.3 mm (2.9 in)
1939202.0 mm (8.0 in)
194141.1 mm (1.6 in)
197493.8 mm (3.7 in)
1975113.7 mm (4.5 in)
197684.8 mm (3.3 in)
197762.0 mm (2.4 in)
197893.2 mm (3.7 in)
197980.9 mm (3.2 in)
198077.2 mm (3.0 in)
1981130.4 mm (5.1 in)
198281.0 mm (3.2 in)
1983127.2 mm (5.0 in)
198485.4 mm (3.4 in)
198594.0 mm (3.7 in)
1986125.8 mm (5.0 in)
1987104.0 mm (4.1 in)
1988106.4 mm (4.2 in)
198977.4 mm (3.0 in)
199089.8 mm (3.5 in)
199186.8 mm (3.4 in)
199287.2 mm (3.4 in)
1993120.8 mm (4.8 in)
199463.0 mm (2.5 in)
1995106.2 mm (4.2 in)
1996117.2 mm (4.6 in)
199762.8 mm (2.5 in)
1998131.0 mm (5.2 in)
199986.4 mm (3.4 in)
200099.0 mm (3.9 in)
200177.8 mm (3.1 in)
200286.4 mm (3.4 in)
2003105.0 mm (4.1 in)
200451.4 mm (2.0 in)
200582.0 mm (3.2 in)
200646.0 mm (1.8 in)
200782.8 mm (3.3 in)
200858.4 mm (2.3 in)
200966.6 mm (2.6 in)
2010128.6 mm (5.1 in)
2011176.6 mm (7.0 in)
2012190.2 mm (7.5 in)
201385.2 mm (3.4 in)
201490.0 mm (3.5 in)
201577.8 mm (3.1 in)
2016121.0 mm (4.8 in)
2017108.0 mm (4.3 in)
201850.4 mm (2.0 in)
2019104.4 mm (4.1 in)
202049.4 mm (1.9 in)
2021115.8 mm (4.6 in)
2022108.4 mm (4.3 in)
202380.8 mm (3.2 in)
2024104.8 mm (4.1 in)
202592.4 mm (3.6 in)
202696.5 mm (3.8 in)

Longest dry spell (CDD)

Longest dry spell (CDD) at Dartmouth Reservoir by year The longest dry spell of the year at Dartmouth Reservoir, 1918 to 2026. The record is 60 days in 1926, marked on the chart; the median year is 25 days. 0204060192019401960198020002020Record: 60 days in 1926
The longest dry spell of the year at Dartmouth Reservoir, 1918 to 2026. The record is 60 days in 1926, marked on the chart; the median year is 25 days.
Longest dry spell (CDD) at Dartmouth Reservoir by year
YearLongest dry spell (CDD)
191825 days
191935 days
192037 days
192124 days
192226 days
192347 days
192419 days
192540 days
192660 days
192723 days
192839 days
192934 days
193042 days
193120 days
193223 days
193323 days
193439 days
193526 days
193620 days
193728 days
193828 days
193918 days
19412 days
197426 days
197517 days
197620 days
197726 days
197828 days
197930 days
198038 days
198118 days
198235 days
198323 days
198421 days
198540 days
198631 days
198733 days
198820 days
198921 days
199029 days
199121 days
199222 days
199318 days
199422 days
199526 days
199618 days
199720 days
199821 days
199916 days
200022 days
200124 days
200227 days
200346 days
200444 days
200520 days
200628 days
200723 days
200830 days
200928 days
201018 days
201115 days
201217 days
201329 days
201423 days
201518 days
201635 days
201723 days
201826 days
201928 days
202016 days
202133 days
202218 days
202314 days
202419 days
202530 days
202625 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

40 years with a frost

Across 40 years with a frost, the median last spring frost at Dartmouth Reservoir falls on 20 September and the median first autumn frost on 16 May, which leaves a median of 241 days between them.

Fitted over all years, the growing season changes by +7.7 days per decade at this station.

Frost dates and growing season at Dartmouth Reservoir
MeasureMedian, all yearsEarliest periodRecent period (1986 to 2025)Recent against earliestFitted trend
Last spring frost20 Septembern/a20 Septembern/a-2.8 days per decade
First autumn frost16 Mayn/a15 Mayn/a+4.9 days per decade
Growing days241 daysn/a246 daysn/a+7.7 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

69 years, 1919 to 2025

A day with at least 57.9 mm (2.3 in) of rain is expected about once in 2 years. A day with at least 107.0 mm (4.2 in) of rain is expected about once in 100 years.

Rainfall return levels at Dartmouth Reservoir: the daily rain expected about once in a given number of years
Expected about once inA day with at leastNote
2 years57.9 mm (2.3 in)
5 years71.8 mm (2.8 in)
10 years80.7 mm (3.2 in)
25 years91.6 mm (3.6 in)
50 years99.5 mm (3.9 in)
100 years107.0 mm (4.2 in)Longer than the 69 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, 69 years of values from 1919 to 2025.

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: 104.1 mm (4.1 in) in 1927; 97.3 mm (3.8 in) in 1919; 94.8 mm (3.7 in) in 2021.

Station Changes

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

Climate Twins

2002 to 2025 against 1961 to 1990

Over 2002 to 2025, Dartmouth Reservoir had a mean temperature of 14.5 C (58.0 F) and 908.9 mm (35.8 in) of rain a year. The 3 stations whose 1961 to 1990 climate was closest to that are Adelong Post Office (Australia, 146 km away), Burrinjuck Dam (Australia, 197 km away) and Tenterfield (Federation Park) (Australia, 933 km away).

Climate twins of Dartmouth Reservoir: stations whose 1961 to 1990 climate is closest to its 2002 to 2025 climate
Twin stationCountryDistance awayMean temperature, 1961-1990Rain a year, 1961-1990Climate difference
Adelong Post OfficeAustralia146 km (91 mi)14.3 C (57.8 F)831.5 mm (32.7 in)0.64
Burrinjuck DamAustralia197 km (122 mi)14.9 C (58.8 F)956.0 mm (37.6 in)0.69
Tenterfield (Federation Park)Australia933 km (580 mi)14.7 C (58.4 F)957.9 mm (37.7 in)1.06

Twins are stations, not cities. A twin is one of the three stations at least 100 km away whose earlier climate is closest to this station's recent one, so a close match does not mean the two places look alike in other ways. A station move or a gap in a record can change that station's averages. The list describes past climate; it is not a forecast and does not say what caused any change. How twins are found, and a search for any station.

Download the Data

  • Data for Dartmouth Reservoir standing records by year: CSV or JSON. Field meanings are on the data page.
  • Data for Dartmouth Reservoir 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 2026-10-12 (12 October 2026). Records are computed by this site and are not official.

Data as of . Last revised (2026-10-12).