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

Glenroy Threshold Days by Year

4 fixed thresholds counted per year at Glenroy (ASN00086046): hot days, frost, tropical nights and heavy rain, with the most days in a year.

Key Facts for Glenroy Thresholds

  • Glenroy: days with 10 mm (0.39 in) or more of precipitation in 21 years, most in 1939 with 24.
  • Glenroy: days with 25 mm (0.98 in) or more of precipitation in 21 years, most in 1949 with 8.
  • Glenroy: days with 50 mm (1.97 in) or more of precipitation in 9 years, most in 1951 with 2.
  • Glenroy: days with 100 mm (3.94 in) or more of precipitation in 1 years, most in 1963 with 1.
  • 4 fixed thresholds have at least one qualifying day at Glenroy.
21 years with a qualifying day
Days with 10 mm (0.39 in) or more of precipitation per year at Glenroy Days per year at Glenroy with 10 mm (0.39 in) or more of precipitation, with the decade average as a line. The most was 24 in 1939. 01020301939: 241940: 171941: 221948: 171949: 211950: 171951: 181952: 231953: 161954: 191956: 201957: 151958: 181959: 141962: 121963: 211964: 241965: 181966: 221967: 131968: 131939194819511954195819631966
Days per year at Glenroy with 10 mm (0.39 in) or more of precipitation, with the decade average as a line. The most was 24 in 1939.
Days with 10 mm (0.39 in) or more of precipitation per year at Glenroy
YearDaysDecade average
19392424
19401719.3
19412219.3
19481719.3
19492119.3
19501717.8
19511817.8
19522317.8
19531617.8
19541917.8
19562017.8
19571517.8
19581817.8
19591417.8
19621217.6
19632117.6
19642417.6
19651817.6
19662217.6
19671317.6
19681317.6
First to last qualifying date each year at Glenroy For each year, a bar from the first to the last day at Glenroy meeting 10 mm (0.39 in). 1939: 17 February 1939 to 27 November 19391940: 6 January 1940 to 20 December 19401941: 2 January 1941 to 8 December 19411948: 2 January 1948 to 29 December 19481949: 22 February 1949 to 21 December 19491950: 1 February 1950 to 30 December 19501951: 5 January 1951 to 27 November 19511952: 4 January 1952 to 26 December 19521953: 6 January 1953 to 7 December 19531954: 17 January 1954 to 21 November 19541956: 2 January 1956 to 16 November 19561957: 14 March 1957 to 26 December 19571958: 31 January 1958 to 29 November 19581959: 26 January 1959 to 29 November 19591962: 20 January 1962 to 29 October 19621963: 7 January 1963 to 5 December 19631964: 7 February 1964 to 28 December 19641965: 5 April 1965 to 8 December 19651966: 13 January 1966 to 16 December 19661967: 7 March 1967 to 30 December 19671968: 21 January 1968 to 26 December 19681939194819511954195819631966JanFebMarAprMayJunJulAugSepOctNovDec
For each year, a bar from the first to the last day at Glenroy meeting 10 mm (0.39 in).
First to last qualifying date each year at Glenroy
YearFirst dateLast date
19391939-02-171939-11-27
19401940-01-061940-12-20
19411941-01-021941-12-08
19481948-01-021948-12-29
19491949-02-221949-12-21
19501950-02-011950-12-30
19511951-01-051951-11-27
19521952-01-041952-12-26
19531953-01-061953-12-07
19541954-01-171954-11-21
19561956-01-021956-11-16
19571957-03-141957-12-26
19581958-01-311958-11-29
19591959-01-261959-11-29
19621962-01-201962-10-29
19631963-01-071963-12-05
19641964-02-071964-12-28
19651965-04-051965-12-08
19661966-01-131966-12-16
19671967-03-071967-12-30
19681968-01-211968-12-26

Every Fixed Threshold

Fixed thresholds at Glenroy
ThresholdYears with a qualifying dayMost days in a yearYearLatest year days
10 mm (0.39 in): Days with 10 mm or more rain2124193913
25 mm (0.98 in): Days with 25 mm or more rain21819491
50 mm (1.97 in): Days with 50 mm or more rain9219511
100 mm (3.94 in): Days with 100 mm or more rain1119631

Years with under 90 percent of days observed are left out of the most days column. Threshold history at this station starts in 1939.

Download the Data

  • Data for Glenroy 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).