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Data as of 2025-12-31
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Built 2026-10-19 (19 October 2026)

Perth Threshold Days by Year (USC00146340)

5 fixed thresholds counted per year at Perth (USC00146340): hot days, frost, tropical nights and heavy rain, with the most days in a year.

Key Facts for Perth Thresholds

  • Perth: days with 10 mm (0.39 in) or more of precipitation in 15 years, most in 2007 with 38.
  • Perth: days with 25 mm (0.98 in) or more of precipitation in 15 years, most in 2004 with 14.
  • Perth: days with 50 mm (1.97 in) or more of precipitation in 14 years, most in 2007 with 6.
  • Perth: days with 10 cm (3.9 in) or more of snowfall in 7 years, most in 2007 with 3.
  • 5 fixed thresholds have at least one qualifying day at Perth.
15 years with a qualifying day
Days with 10 mm (0.39 in) or more of precipitation per year at Perth Days per year at Perth with 10 mm (0.39 in) or more of precipitation, with the decade average as a line. The most was 38 in 2007. 0102030401993: 301994: 252000: 332001: 212002: 252003: 282004: 352005: 232006: 202007: 382008: 342009: 272010: 172011: 192012: 1419932000200220042006200820102012
Days per year at Perth with 10 mm (0.39 in) or more of precipitation, with the decade average as a line. The most was 38 in 2007.
Days with 10 mm (0.39 in) or more of precipitation per year at Perth
YearDaysDecade average
19933027.5
19942527.5
20003328.4
20012128.4
20022528.4
20032828.4
20043528.4
20052328.4
20062028.4
20073828.4
20083428.4
20092728.4
20101716.7
20111916.7
20121416.7
First to last qualifying date each year at Perth For each year, a bar from the first to the last day at Perth meeting 10 mm (0.39 in). 1993: 9 January 1993 to 14 November 19931994: 23 February 1994 to 16 December 19942000: 18 February 2000 to 6 November 20002001: 28 January 2001 to 18 November 20012002: 31 January 2002 to 4 December 20022003: 14 February 2003 to 13 December 20032004: 18 January 2004 to 6 December 20042005: 3 January 2005 to 31 October 20052006: 20 March 2006 to 30 December 20062007: 21 January 2007 to 12 December 20072008: 3 March 2008 to 27 December 20082009: 10 March 2009 to 29 October 20092010: 9 March 2010 to 13 November 20102011: 25 February 2011 to 20 December 20112012: 10 February 2012 to 11 November 201219932000200220042006200820102012JanFebMarAprMayJunJulAugSepOctNovDec
For each year, a bar from the first to the last day at Perth meeting 10 mm (0.39 in).
First to last qualifying date each year at Perth
YearFirst dateLast date
19931993-01-091993-11-14
19941994-02-231994-12-16
20002000-02-182000-11-06
20012001-01-282001-11-18
20022002-01-312002-12-04
20032003-02-142003-12-13
20042004-01-182004-12-06
20052005-01-032005-10-31
20062006-03-202006-12-30
20072007-01-212007-12-12
20082008-03-032008-12-27
20092009-03-102009-10-29
20102010-03-092010-11-13
20112011-02-252011-12-20
20122012-02-102012-11-11

Every Fixed Threshold

Fixed thresholds at Perth
ThresholdYears with a qualifying dayMost days in a yearYearLatest year days
10 mm (0.39 in): Days with 10 mm or more rain1538200714
25 mm (0.98 in): Days with 25 mm or more rain151420046
50 mm (1.97 in): Days with 50 mm or more rain14620071
100 mm (3.94 in): Days with 100 mm or more rain2120021
10 cm (3.9 in): Days with 10 cm or more snowfall7320071

Years with under 90 percent of days observed are left out of the most days column. Threshold history at this station starts in 1993.

Download the Data

  • Data for Perth 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). Threshold counts are computed by this site.

Data as of . Last revised (2025-12-31).