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Built 2026-10-19 (19 October 2026)

Mount McGregor Threshold Days by Year (USC00305580)

16 fixed thresholds counted per year at Mount McGregor (USC00305580): hot days, frost, tropical nights and heavy rain, with the most days in a year.

Key Facts for Mount McGregor Thresholds

  • Mount McGregor: nights with a minimum temperature at or below 0 C (32 F) in 25 years, most in 1939 with 174.
  • Mount McGregor: nights with a minimum temperature at or below -10 C (14 F) in 25 years, most in 1934 with 73.
  • Mount McGregor: nights with a minimum temperature at or above 20 C (68 F) in 25 years, most in 1919 with 10.
  • Mount McGregor: days with a maximum temperature at or above 30 C (86 F) in 24 years, most in 1944 with 40.
  • 16 fixed thresholds have at least one qualifying day at Mount McGregor.
24 years with a qualifying day
Days at or above 30 C (86 F) per year at Mount McGregor Days per year at Mount McGregor with a maximum temperature at or above 30 C (86 F), with the decade average as a line. The most was 40 in 1944. 0102030401917: 51918: 131919: 111920: 61924: 81925: 161926: 41927: 51929: 141930: 241931: 221932: 91933: 301934: 371935: 221936: 331937: 301938: 201939: 241940: 91941: 241942: 141943: 251944: 4019171920192619301933193619391942
Days per year at Mount McGregor with a maximum temperature at or above 30 C (86 F), with the decade average as a line. The most was 40 in 1944.
Days at or above 30 C (86 F) per year at Mount McGregor
YearDaysDecade average
191759.7
1918139.7
1919119.7
192068.8
192488.8
1925168.8
192648.8
192758.8
1929148.8
19302425.1
19312225.1
1932925.1
19333025.1
19343725.1
19352225.1
19363325.1
19373025.1
19382025.1
19392425.1
1940922.4
19412422.4
19421422.4
19432522.4
19444022.4
First to last qualifying date each year at Mount McGregor For each year, a bar from the first to the last day at Mount McGregor meeting 30 C (86 F). 1917: 23 July 1917 to 2 August 19171918: 1 June 1918 to 24 August 19181919: 29 May 1919 to 5 July 19191920: 1 June 1920 to 26 September 19201924: 29 July 1924 to 1 September 19241925: 3 June 1925 to 1 September 19251926: 10 July 1926 to 22 July 19261927: 10 June 1927 to 15 July 19271929: 30 May 1929 to 5 September 19291930: 2 May 1930 to 16 August 19301931: 28 May 1931 to 14 September 19311932: 16 May 1932 to 5 September 19321933: 8 June 1933 to 28 August 19331934: 5 May 1934 to 10 August 19341935: 29 June 1935 to 19 August 19351936: 8 May 1936 to 24 August 19361937: 31 May 1937 to 4 September 19371938: 7 June 1938 to 17 August 19381939: 7 May 1939 to 17 September 19391940: 5 June 1940 to 10 August 19401941: 20 April 1941 to 16 September 19411942: 30 May 1942 to 16 September 19421943: 3 June 1943 to 23 August 19431944: 4 May 1944 to 2 September 194419171920192619301933193619391942JanFebMarAprMayJunJulAugSepOctNovDec
For each year, a bar from the first to the last day at Mount McGregor meeting 30 C (86 F).
First to last qualifying date each year at Mount McGregor
YearFirst dateLast date
19171917-07-231917-08-02
19181918-06-011918-08-24
19191919-05-291919-07-05
19201920-06-011920-09-26
19241924-07-291924-09-01
19251925-06-031925-09-01
19261926-07-101926-07-22
19271927-06-101927-07-15
19291929-05-301929-09-05
19301930-05-021930-08-16
19311931-05-281931-09-14
19321932-05-161932-09-05
19331933-06-081933-08-28
19341934-05-051934-08-10
19351935-06-291935-08-19
19361936-05-081936-08-24
19371937-05-311937-09-04
19381938-06-071938-08-17
19391939-05-071939-09-17
19401940-06-051940-08-10
19411941-04-201941-09-16
19421942-05-301942-09-16
19431943-06-031943-08-23
19441944-05-041944-09-02

Every Fixed Threshold

Fixed thresholds at Mount McGregor
ThresholdYears with a qualifying dayMost days in a yearYearLatest year days
30 C (86 F): Days2440194440
35 C (95 F): Days7419361
90 F (32.2 C): Days2119194419
0 C (32 F): Ice days (max2471191756
0 C (32 F): Frost days (min251741939169
-10 C (14 F): Days with min2573193456
-20 C (-4 F): Days with min242219346
-30 C (-22 F): Days with min6219332
20 C (68 F): Tropical nights (min2510191910
25 C (77 F): Days with min2119191
10 mm (0.39 in): Days with 10 mm or more rain2345191741
25 mm (0.98 in): Days with 25 mm or more rain2316192011
50 mm (1.97 in): Days with 50 mm or more rain19419351
100 mm (3.94 in): Days with 100 mm or more rain3219192
10 cm (3.9 in): Days with 10 cm or more snowfall21119265
25 cm (9.8 in): Days with 25 cm or more snowfall1319263

Years with under 90 percent of days observed are left out of the most days column. Threshold history at this station starts in 1917.

Download the Data

  • Data for Mount McGregor 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).