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Nullo Mountain AWS Weather Records (ASN00062100)

Record envelope, standing records and threshold days for Nullo Mountain AWS (ASN00062100), Australia, with 37 years of record.

Key Facts for Nullo Mountain AWS

  • Nullo Mountain AWS (ASN00062100) is a weather station in Australia at -32.72 latitude and 150.23 longitude, 1,130 m (3,707 ft) above sea level.
  • The station reports from 1990 to 2026, 37 years of record.
  • 1,464 records set at Nullo Mountain AWS still stand.
  • Records are tracked for tmax, tmin, prcp: an element needs 30 years of data to be eligible.
  • Nullo Mountain AWS set a daily record precipitation of 13.0 mm (0.5 in) on 4 October 2026 (provisional).

Provisional Records

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

About the Station

  • Location: Australia, -32.72 latitude, 150.23 longitude.
  • Elevation: 1,130 m (3,707 ft).
  • Period of record: 1990 to 2026, 37 years.
  • Eligible elements: tmax, tmin, prcp.

Daily Record Envelope and 2026

15 days at or beyond a record
Daily record high and record low at Nullo Mountain AWS, with 2026 drawn through them The band shows the record high and record low for each calendar day at Nullo Mountain AWS. The lines show the 2026 daily maximum and minimum. 15 days in 2026 matched or passed a record. Temperatures are in degrees Celsius. -10010203040 JanFebMarAprMayJunJulAugSepOctNovDec
The band shows the record high and record low for each calendar day at Nullo Mountain AWS. The lines show the 2026 daily maximum and minimum. 15 days in 2026 matched or passed a record. Temperatures are in degrees Celsius.
Daily record high and record low at Nullo Mountain AWS, with 2026 drawn through them
MonthHighest record highLowest record low2026 highest maximum2026 lowest minimum
Jan37.3 C (99.1 F)0.0 C (32.0 F)34.4 C (93.9 F)8.7 C (47.7 F)
Feb37.4 C (99.3 F)3.8 C (38.8 F)31.2 C (88.2 F)8.4 C (47.1 F)
Mar33.0 C (91.4 F)2.5 C (36.5 F)27.1 C (80.8 F)2.8 C (37.0 F)
Apr27.7 C (81.9 F)-4.5 C (23.9 F)26.2 C (79.2 F)3.1 C (37.6 F)
May21.0 C (69.8 F)-2.4 C (27.7 F)20.6 C (69.1 F)0.4 C (32.7 F)
Jun16.8 C (62.2 F)-8.2 C (17.2 F)15.3 C (59.5 F)0.1 C (32.2 F)
Jul17.3 C (63.1 F)-3.6 C (25.5 F)15.6 C (60.1 F)-2.0 C (28.4 F)
Aug20.6 C (69.1 F)-4.1 C (24.6 F)17.2 C (63.0 F)-1.3 C (29.7 F)
Sep26.4 C (79.5 F)-7.4 C (18.7 F)24.3 C (75.7 F)0.8 C (33.4 F)
Oct28.1 C (82.6 F)-1.1 C (30.0 F)23.1 C (73.6 F)6.3 C (43.3 F)
Nov34.9 C (94.8 F)0.0 C (32.0 F)n/an/a
Dec36.5 C (97.7 F)-0.6 C (30.9 F)n/an/a

Which Years Hold Standing Records

1,464 standing records
Standing records at Nullo Mountain AWS by the year they were set 1,464 records at Nullo Mountain AWS still stand. 1995 holds the most, with 63. 0204060801990: 271991: 271992: 391993: 401994: 511995: 631996: 491997: 491998: 461999: 182000: 382001: 322002: 412003: 442004: 542005: 402006: 262007: 372008: 372009: 552010: 332011: 332012: 362013: 412014: 312015: 382016: 522017: 512018: 392019: 592020: 272021: 412022: 212023: 582024: 252025: 372026: 291990199419982002200620102014201820222026
1,464 records at Nullo Mountain AWS still stand. 1995 holds the most, with 63.
Standing records at Nullo Mountain AWS by the year they were set
Year setStanding records
199027
199127
199239
199340
199451
199563
199649
199749
199846
199918
200038
200132
200241
200344
200454
200540
200626
200737
200837
200955
201033
201133
201236
201341
201431
201538
201652
201751
201839
201959
202027
202141
202221
202358
202425
202537
202629

Wettest Day of Each Month

Jan: 147.6 mm (5.8 in)
Record daily precipitation for each month at Nullo Mountain AWS The wettest day on record for each calendar month at Nullo Mountain AWS. The most was 147.6 mm (5.8 in) on 29 January 2013. 050100150 Jan: 147.6 mm (5.8 in), 29 January 2013 Jan Feb: 89.2 mm (3.5 in), 26 February 2018 Feb Mar: 77.4 mm (3.0 in), 6 March 2022 Mar Apr: 84.8 mm (3.3 in), 6 April 2024 Apr May: 57.0 mm (2.2 in), 17 May 1995 May Jun: 109.6 mm (4.3 in), 30 June 2005 Jun Jul: 71.0 mm (2.8 in), 4 July 2022 Jul Aug: 74.0 mm (2.9 in), 24 August 2003 Aug Sep: 53.0 mm (2.1 in), 3 September 2016 Sep Oct: 63.2 mm (2.5 in), 16 October 2010 Oct Nov: 78.0 mm (3.1 in), 5 November 1996 Nov Dec: 67.2 mm (2.6 in), 25 December 2006 Dec
The wettest day on record for each calendar month at Nullo Mountain AWS. The most was 147.6 mm (5.8 in) on 29 January 2013.
Record daily precipitation for each month at Nullo Mountain AWS
MonthRecord daily precipitation (mm)Date
Jan147.6 mm (5.8 in)29 January 2013
Feb89.2 mm (3.5 in)26 February 2018
Mar77.4 mm (3.0 in)6 March 2022
Apr84.8 mm (3.3 in)6 April 2024
May57.0 mm (2.2 in)17 May 1995
Jun109.6 mm (4.3 in)30 June 2005
Jul71.0 mm (2.8 in)4 July 2022
Aug74.0 mm (2.9 in)24 August 2003
Sep53.0 mm (2.1 in)3 September 2016
Oct63.2 mm (2.5 in)16 October 2010
Nov78.0 mm (3.1 in)5 November 1996
Dec67.2 mm (2.6 in)25 December 2006

Period of Record Coverage

1990 to 2026
Days with data per year at Nullo Mountain AWS 37 years of record at Nullo Mountain AWS, 1990 to 2026. 3 years have data for under 90 percent of days and are left out of rankings: 1990, 1991, 2026. 1990: 91 of 365 days1991: 291 of 365 days1992: 334 of 366 days1993: 349 of 365 days1994: 349 of 365 days1995: 335 of 365 days1996: 335 of 366 days1997: 356 of 365 days1998: 356 of 365 days1999: 355 of 365 days2000: 352 of 366 days2001: 354 of 365 days2002: 355 of 365 days2003: 357 of 365 days2004: 361 of 366 days2005: 353 of 365 days2006: 361 of 365 days2007: 365 of 365 days2008: 366 of 366 days2009: 364 of 365 days2010: 365 of 365 days2011: 364 of 365 days2012: 352 of 366 days2013: 360 of 365 days2014: 354 of 365 days2015: 362 of 365 days2016: 363 of 366 days2017: 361 of 365 days2018: 349 of 365 days2019: 354 of 365 days2020: 357 of 366 days2021: 364 of 365 days2022: 334 of 365 days2023: 362 of 365 days2024: 366 of 366 days2025: 362 of 365 days2026: 279 of 365 days19901995200020052010201520202025
37 years of record at Nullo Mountain AWS, 1990 to 2026. 3 years have data for under 90 percent of days and are left out of rankings: 1990, 1991, 2026.
Days with data per year at Nullo Mountain AWS
YearDays with dataShare of yearComplete
19909125%No
199129180%No
199233491%Yes
199334996%Yes
199434996%Yes
199533592%Yes
199633592%Yes
199735698%Yes
199835698%Yes
199935597%Yes
200035296%Yes
200135497%Yes
200235597%Yes
200335798%Yes
200436199%Yes
200535397%Yes
200636199%Yes
2007365100%Yes
2008366100%Yes
2009364100%Yes
2010365100%Yes
2011364100%Yes
201235296%Yes
201336099%Yes
201435497%Yes
201536299%Yes
201636399%Yes
201736199%Yes
201834996%Yes
201935497%Yes
202035798%Yes
2021364100%Yes
202233492%Yes
202336299%Yes
2024366100%Yes
202536299%Yes
202627976%No

Latest Records

20
Latest records at Nullo Mountain AWS
DateStationRecordValueBeat old record byOld record stoodSignificance
4 October 2026Nullo Mountain AWS, AUdaily rain (Provisional)13.0 mm (0.5 in)2.0 mm (0.08 in)27 years13 of 100 (Routine)
28 September 2026Nullo Mountain AWS, AUdaily low max (Provisional)9.4 C (48.9 F)0.8 C (1.4 F)16 years10 of 100 (Routine)
26 September 2026Nullo Mountain AWS, AUdaily high max (Provisional)24.1 C (75.4 F)3.7 C (6.7 F)12 years15 of 100 (Routine)
25 September 2026Nullo Mountain AWS, AUdaily high max (Tie, Provisional)22.8 C (73.0 F)tie12 years1 of 100 (Routine)
21 September 2026Nullo Mountain AWS, AUdaily high max (Provisional)24.3 C (75.7 F)2.9 C (5.2 F)25 years17 of 100 (Routine)
21 September 2026Nullo Mountain AWS, AUdaily high min (Provisional)15.0 C (59.0 F)4.1 C (7.4 F)7 years16 of 100 (Routine)
5 September 2026Nullo Mountain AWS, AUdaily high max (Provisional)22.3 C (72.1 F)3.6 C (6.5 F)12 years15 of 100 (Routine)
3 September 2026Nullo Mountain AWS, AUdaily high min (Provisional)11.9 C (53.4 F)0.5 C (0.9 F)19 years9 of 100 (Routine)
26 August 2026Nullo Mountain AWS, AUdaily rain (Provisional)33.2 mm (1.3 in)8.2 mm (0.32 in)1 year11 of 100 (Routine)
22 August 2026Nullo Mountain AWS, AUdaily rain (Provisional)5.2 mm (0.20 in)1.2 mm (0.05 in)28 years12 of 100 (Routine)
10 August 2026Nullo Mountain AWS, AUdaily rain24.8 mm (1.0 in)9.6 mm (0.38 in)16 years17 of 100 (Routine)
21 July 2026Nullo Mountain AWS, AUdaily high max15.6 C (60.1 F)0.5 C (0.9 F)9 years7 of 100 (Routine)
20 July 2026Nullo Mountain AWS, AUdaily high max14.7 C (58.5 F)1.2 C (2.2 F)7 years9 of 100 (Routine)
2 July 2026Nullo Mountain AWS, AUdaily high min7.9 C (46.2 F)0.9 C (1.6 F)5 years7 of 100 (Routine)
1 July 2026Nullo Mountain AWS, AUdaily high min8.2 C (46.8 F)0.7 C (1.3 F)16 years10 of 100 (Routine)
19 June 2026Nullo Mountain AWS, AUdaily high min8.2 C (46.8 F)0.7 C (1.3 F)17 years10 of 100 (Routine)
18 June 2026Nullo Mountain AWS, AUdaily high min9.0 C (48.2 F)0.4 C (0.7 F)9 years6 of 100 (Routine)
17 June 2026Nullo Mountain AWS, AUdaily high min9.8 C (49.6 F)1.5 C (2.7 F)11 years11 of 100 (Routine)
17 June 2026Nullo Mountain AWS, AUdaily high max14.0 C (57.2 F)1.9 C (3.4 F)3 years10 of 100 (Routine)
16 June 2026Nullo Mountain AWS, AUdaily high max15.3 C (59.5 F)0.8 C (1.4 F)4 years7 of 100 (Routine)

Climate Trend

30 complete years, 1992 to 2025
Annual mean temperature at Nullo Mountain AWS as warming stripes, 1992 to 2025 One stripe for each of 30 complete years at Nullo Mountain AWS, 1992 to 2025. Blue stripes are years cooler than the station's own mean of 12.5 C (54.5 F); red stripes are warmer. The coolest year was 1992, at 10.9 C (51.6 F), and the warmest was 2019, at 13.9 C (57.0 F). The strongest colour marks a difference of 1.7 C (3.1 F). 1992: 10.9 C, -1.6 C from the station mean1993: 11.9 C, -0.6 C from the station mean1994: 12.3 C, -0.2 C from the station mean1996: 11.7 C, -0.8 C from the station mean1997: 12.7 C, +0.2 C from the station mean1998: 12.7 C, +0.2 C from the station mean1999: 12.1 C, -0.4 C from the station mean2000: 12.1 C, -0.4 C from the station mean2001: 12.6 C, +0.1 C from the station mean2002: 13.2 C, +0.7 C from the station mean2003: 12.2 C, -0.3 C from the station mean2004: 12.7 C, +0.2 C from the station mean2005: 12.8 C, +0.3 C from the station mean2006: 12.8 C, +0.3 C from the station mean2007: 12.5 C, 0.0 C from the station mean2008: 11.5 C, -1.0 C from the station mean2009: 12.9 C, +0.4 C from the station mean2010: 11.9 C, -0.6 C from the station mean2011: 11.9 C, -0.6 C from the station mean2013: 13.0 C, +0.4 C from the station mean2015: 12.5 C, 0.0 C from the station mean2016: 12.8 C, +0.3 C from the station mean2017: 13.3 C, +0.8 C from the station mean2018: 13.3 C, +0.7 C from the station mean2019: 13.9 C, +1.4 C from the station mean2020: 12.6 C, +0.1 C from the station mean2021: 11.6 C, -0.9 C from the station mean2023: 13.1 C, +0.6 C from the station mean2024: 13.0 C, +0.5 C from the station mean2025: 13.0 C, +0.4 C from the station mean19921995200020052010201520202025
One stripe for each of 30 complete years at Nullo Mountain AWS, 1992 to 2025. Blue stripes are years cooler than the station's own mean of 12.5 C (54.5 F); red stripes are warmer. The coolest year was 1992, at 10.9 C (51.6 F), and the warmest was 2019, at 13.9 C (57.0 F). The strongest colour marks a difference of 1.7 C (3.1 F).
Annual mean temperature at Nullo Mountain AWS as warming stripes, 1992 to 2025
YearAnnual mean temperatureDifference from the station mean
199210.9 C-1.61 C
199311.9 C-0.62 C
199412.3 C-0.23 C
199611.7 C-0.79 C
199712.7 C+0.22 C
199812.7 C+0.20 C
199912.1 C-0.38 C
200012.1 C-0.40 C
200112.6 C+0.07 C
200213.2 C+0.69 C
200312.2 C-0.33 C
200412.7 C+0.15 C
200512.8 C+0.27 C
200612.8 C+0.31 C
200712.5 C+0.00 C
200811.5 C-1.05 C
200912.9 C+0.38 C
201011.9 C-0.65 C
201111.9 C-0.57 C
201313.0 C+0.44 C
201512.5 C-0.05 C
201612.8 C+0.26 C
201713.3 C+0.82 C
201813.3 C+0.74 C
201913.9 C+1.37 C
202012.6 C+0.06 C
202111.6 C-0.87 C
202313.1 C+0.63 C
202413.0 C+0.50 C
202513.0 C+0.44 C

The annual mean temperature here has risen by 0.3 C (0.1 to 0.5) per decade over 1992 to 2025. In Fahrenheit: 0.6 F (0.2 to 1.0) per decade. The slope is a straight line fitted to 30 complete years; the brackets give its 95 percent interval.

Fitted temperature trends per decade at Nullo Mountain AWS
MeasurePer decade (C)Per decade (F)PeriodComplete yearsReading
Annual mean temperature0.3 C (0.1 to 0.5) per decade0.6 F (0.2 to 1.0) per decade1992 to 202530Rise
Mean daily maximum0.4 C (0.1 to 0.7) per decade0.7 F (0.1 to 1.2) per decade1992 to 202530Rise
Mean daily minimum0.3 C (0.1 to 0.4) per decade0.5 F (0.2 to 0.8) per decade1992 to 202530Rise

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

1990 to 2026
Yearly extremes at Nullo Mountain AWS: the record and the median year
MeasureRecordYear of the recordMedian yearYears with a value
Hottest day (TXx)37.4 C (99.3 F)201732.8 C (91.0 F)37
Coldest night (TNn)-8.2 C (17.2 F)1997-2.5 C (27.5 F)37
Wettest day (Rx1day)147.6 mm (5.8 in)201364.0 mm (2.5 in)33
Wettest five days (Rx5day)180.2 mm (7.1 in)2005103.0 mm (4.1 in)32
Longest dry spell (CDD)37 days201722 days33

Hottest day (TXx)

Hottest day (TXx) at Nullo Mountain AWS by year The hottest day of the year at Nullo Mountain AWS, 1990 to 2026. The record is 37.4 C (99.3 F) in 2017, marked on the chart; the median year is 32.8 C (91.0 F). 2527.53032.53537.51990200020102020Record: 37.4 C (99.3 F) in 2017
The hottest day of the year at Nullo Mountain AWS, 1990 to 2026. The record is 37.4 C (99.3 F) in 2017, marked on the chart; the median year is 32.8 C (91.0 F).
Hottest day (TXx) at Nullo Mountain AWS by year
YearHottest day (TXx)
199032.6 C (90.7 F)
199132.1 C (89.8 F)
199230.4 C (86.7 F)
199332.3 C (90.1 F)
199432.5 C (90.5 F)
199529.7 C (85.5 F)
199629.2 C (84.6 F)
199734.2 C (93.6 F)
199831.7 C (89.1 F)
199932.1 C (89.8 F)
200032.8 C (91.0 F)
200135.5 C (95.9 F)
200231.3 C (88.3 F)
200334.6 C (94.3 F)
200435.5 C (95.9 F)
200532.9 C (91.2 F)
200635.9 C (96.6 F)
200733.4 C (92.1 F)
200828.8 C (83.8 F)
200934.7 C (94.5 F)
201030.8 C (87.4 F)
201133.1 C (91.6 F)
201231.9 C (89.4 F)
201336.4 C (97.5 F)
201434.9 C (94.8 F)
201532.0 C (89.6 F)
201631.5 C (88.7 F)
201737.4 C (99.3 F)
201834.5 C (94.1 F)
201936.5 C (97.7 F)
202037.3 C (99.1 F)
202130.7 C (87.3 F)
202227.4 C (81.3 F)
202333.0 C (91.4 F)
202431.0 C (87.8 F)
202532.8 C (91.0 F)
202634.4 C (93.9 F)

Coldest night (TNn)

Coldest night (TNn) at Nullo Mountain AWS by year The coldest night of the year at Nullo Mountain AWS, 1990 to 2026. The record is -8.2 C (17.2 F) in 1997, marked on the chart; the median year is -2.5 C (27.5 F). -10-8-6-4-201990200020102020Record: -8.2 C (17.2 F) in 1997
The coldest night of the year at Nullo Mountain AWS, 1990 to 2026. The record is -8.2 C (17.2 F) in 1997, marked on the chart; the median year is -2.5 C (27.5 F).
Coldest night (TNn) at Nullo Mountain AWS by year
YearColdest night (TNn)
1990-1.0 C (30.2 F)
1991-2.1 C (28.2 F)
1992-2.5 C (27.5 F)
1993-4.5 C (23.9 F)
1994-3.5 C (25.7 F)
1995-3.7 C (25.3 F)
1996-7.4 C (18.7 F)
1997-8.2 C (17.2 F)
1998-2.5 C (27.5 F)
1999-1.7 C (28.9 F)
2000-2.2 C (28.0 F)
2001-2.3 C (27.9 F)
2002-1.6 C (29.1 F)
2003-3.1 C (26.4 F)
2004-1.6 C (29.1 F)
2005-4.1 C (24.6 F)
2006-1.8 C (28.8 F)
2007-3.6 C (25.5 F)
2008-2.7 C (27.1 F)
2009-2.7 C (27.1 F)
2010-3.4 C (25.9 F)
2011-3.0 C (26.6 F)
2012-2.5 C (27.5 F)
2013-1.6 C (29.1 F)
2014-3.2 C (26.2 F)
2015-2.9 C (26.8 F)
2016-3.1 C (26.4 F)
2017-2.3 C (27.9 F)
2018-2.3 C (27.9 F)
2019-2.0 C (28.4 F)
2020-2.5 C (27.5 F)
2021-2.5 C (27.5 F)
2022-2.6 C (27.3 F)
2023-3.1 C (26.4 F)
2024-3.1 C (26.4 F)
2025-1.8 C (28.8 F)
2026-2.0 C (28.4 F)

Wettest day (Rx1day)

Wettest day (Rx1day) at Nullo Mountain AWS by year The wettest day of the year at Nullo Mountain AWS, 1990 to 2026. The record is 147.6 mm (5.8 in) in 2013, marked on the chart; the median year is 64.0 mm (2.5 in). 0501001501990200020102020Record: 147.6 mm (5.8 in) in 2013
The wettest day of the year at Nullo Mountain AWS, 1990 to 2026. The record is 147.6 mm (5.8 in) in 2013, marked on the chart; the median year is 64.0 mm (2.5 in).
Wettest day (Rx1day) at Nullo Mountain AWS by year
YearWettest day (Rx1day)
1990n/a
1991n/a
1992n/a
1993n/a
199440.0 mm (1.6 in)
199557.0 mm (2.2 in)
199678.0 mm (3.1 in)
199760.0 mm (2.4 in)
199860.0 mm (2.4 in)
199948.0 mm (1.9 in)
200063.0 mm (2.5 in)
200164.0 mm (2.5 in)
200258.0 mm (2.3 in)
200374.0 mm (2.9 in)
200457.2 mm (2.3 in)
2005109.6 mm (4.3 in)
200667.2 mm (2.6 in)
200797.6 mm (3.8 in)
200865.4 mm (2.6 in)
200974.4 mm (2.9 in)
201065.0 mm (2.6 in)
201162.0 mm (2.4 in)
201276.6 mm (3.0 in)
2013147.6 mm (5.8 in)
201452.4 mm (2.1 in)
201550.8 mm (2.0 in)
201656.0 mm (2.2 in)
201750.4 mm (2.0 in)
201889.2 mm (3.5 in)
201947.2 mm (1.9 in)
202070.4 mm (2.8 in)
202173.2 mm (2.9 in)
202277.4 mm (3.0 in)
202341.8 mm (1.6 in)
202484.8 mm (3.3 in)
202565.4 mm (2.6 in)
202650.4 mm (2.0 in)

Wettest five days (Rx5day)

Wettest five days (Rx5day) at Nullo Mountain AWS by year The wettest five days of the year at Nullo Mountain AWS, 1990 to 2026. The record is 180.2 mm (7.1 in) in 2005, marked on the chart; the median year is 103.0 mm (4.1 in). 501001502001990200020102020Record: 180.2 mm (7.1 in) in 2005
The wettest five days of the year at Nullo Mountain AWS, 1990 to 2026. The record is 180.2 mm (7.1 in) in 2005, marked on the chart; the median year is 103.0 mm (4.1 in).
Wettest five days (Rx5day) at Nullo Mountain AWS by year
YearWettest five days (Rx5day)
1990n/a
1991n/a
1992n/a
1993n/a
1994n/a
1995107.0 mm (4.2 in)
199692.0 mm (3.6 in)
199794.0 mm (3.7 in)
1998114.0 mm (4.5 in)
199972.0 mm (2.8 in)
2000164.0 mm (6.5 in)
200197.0 mm (3.8 in)
200298.0 mm (3.9 in)
2003126.0 mm (5.0 in)
200486.6 mm (3.4 in)
2005180.2 mm (7.1 in)
200699.0 mm (3.9 in)
2007173.8 mm (6.8 in)
200892.0 mm (3.6 in)
2009129.8 mm (5.1 in)
2010145.6 mm (5.7 in)
2011142.0 mm (5.6 in)
2012144.4 mm (5.7 in)
2013176.2 mm (6.9 in)
201477.6 mm (3.1 in)
201578.4 mm (3.1 in)
2016110.0 mm (4.3 in)
201765.0 mm (2.6 in)
201892.2 mm (3.6 in)
201993.0 mm (3.7 in)
2020136.8 mm (5.4 in)
2021160.0 mm (6.3 in)
2022158.8 mm (6.3 in)
202366.0 mm (2.6 in)
2024151.6 mm (6.0 in)
202576.2 mm (3.0 in)
202674.8 mm (2.9 in)

Longest dry spell (CDD)

Longest dry spell (CDD) at Nullo Mountain AWS by year The longest dry spell of the year at Nullo Mountain AWS, 1990 to 2026. The record is 37 days in 2017, marked on the chart; the median year is 22 days. 0102030401990200020102020Record: 37 days in 2017
The longest dry spell of the year at Nullo Mountain AWS, 1990 to 2026. The record is 37 days in 2017, marked on the chart; the median year is 22 days.
Longest dry spell (CDD) at Nullo Mountain AWS by year
YearLongest dry spell (CDD)
1990n/a
1991n/a
1992n/a
1993n/a
19943 days
199528 days
199616 days
199734 days
199820 days
199917 days
200018 days
200121 days
200232 days
200317 days
200424 days
200531 days
200627 days
200732 days
200817 days
200920 days
201019 days
201115 days
201222 days
201322 days
201420 days
201523 days
201627 days
201737 days
201821 days
201931 days
202018 days
202122 days
202222 days
202326 days
202419 days
202519 days
202628 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

30 years with a frost

Across 30 years with a frost, the median last spring frost at Nullo Mountain AWS falls on 15 September and the median first autumn frost on 1 June, which leaves a median of 255 days between them.

Fitted over all years, the growing season changes by +18.4 days per decade at this station.

Frost dates and growing season at Nullo Mountain AWS
MeasureMedian, all yearsEarliest periodRecent period (1992 to 2025)Recent against earliestFitted trend
Last spring frost15 Septembern/a15 Septembern/a-7.8 days per decade
First autumn frost1 Junen/a1 Junen/a+10.5 days per decade
Growing days255 daysn/a255 daysn/a+18.4 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

30 years, 1996 to 2025

A day with at least 64.4 mm (2.5 in) of rain is expected about once in 2 years. A day with at least 149.1 mm (5.9 in) of rain is expected about once in 100 years.

Rainfall return levels at Nullo Mountain AWS: the daily rain expected about once in a given number of years
Expected about once inA day with at leastNote
2 years64.4 mm (2.5 in)
5 years81.5 mm (3.2 in)
10 years94.8 mm (3.7 in)
25 years114.1 mm (4.5 in)
50 years130.6 mm (5.1 in)Longer than the 30 years of record
100 years149.1 mm (5.9 in)Longer than the 30 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, 30 years of values from 1996 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: 147.6 mm (5.8 in) in 2013; 109.6 mm (4.3 in) in 2005; 97.6 mm (3.8 in) in 2007.

Download the Data

  • Data for Nullo Mountain AWS standing records by year: CSV or JSON. Field meanings are on the data page.
  • Data for Nullo Mountain AWS 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 2026-10-16 (16 October 2026). Records are computed by this site and are not official.

Data as of . Last revised (2026-10-16).