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Data as of 2025-12-31
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Built 2026-10-18 (18 October 2026)

Roland West Portal Threshold Days by Year

15 fixed thresholds counted per year at Roland West Portal (USC00107858): hot days, frost, tropical nights and heavy rain, with the most days in a year.

Key Facts for Roland West Portal Thresholds

  • Roland West Portal: days with a maximum temperature at or above 30 C (86 F) in 28 years, most in 1936 with 25.
  • Roland West Portal: days with a maximum temperature at or below 0 C (32 F) in 28 years, most in 1922 with 79.
  • Roland West Portal: nights with a minimum temperature at or below 0 C (32 F) in 28 years, most in 1929 with 202.
  • Roland West Portal: nights with a minimum temperature at or below -10 C (14 F) in 28 years, most in 1922 with 51.
  • 15 fixed thresholds have at least one qualifying day at Roland West Portal.
28 years with a qualifying day
Days at or above 30 C (86 F) per year at Roland West Portal Days per year at Roland West Portal with a maximum temperature at or above 30 C (86 F), with the decade average as a line. The most was 25 in 1936. 01020301922: 181923: 81924: 91925: 131926: 111927: 71928: 151929: 181930: 121931: 211932: 101933: 141934: 161935: 111936: 251937: 71938: 141939: 131940: 191941: 71942: 181943: 51944: 71945: 121946: 91949: 71951: 241952: 91922192519281931193419371940194319461952
Days per year at Roland West Portal with a maximum temperature at or above 30 C (86 F), with the decade average as a line. The most was 25 in 1936.
Days at or above 30 C (86 F) per year at Roland West Portal
YearDaysDecade average
19221812.4
1923812.4
1924912.4
19251312.4
19261112.4
1927712.4
19281512.4
19291812.4
19301214.3
19312114.3
19321014.3
19331414.3
19341614.3
19351114.3
19362514.3
1937714.3
19381414.3
19391314.3
19401910.5
1941710.5
19421810.5
1943510.5
1944710.5
19451210.5
1946910.5
1949710.5
19512416.5
1952916.5
First to last qualifying date each year at Roland West Portal For each year, a bar from the first to the last day at Roland West Portal meeting 30 C (86 F). 1922: 20 June 1922 to 28 August 19221923: 1 July 1923 to 18 August 19231924: 30 June 1924 to 4 September 19241925: 20 June 1925 to 20 August 19251926: 25 June 1926 to 25 August 19261927: 17 July 1927 to 19 August 19271928: 25 May 1928 to 2 September 19281929: 17 July 1929 to 30 August 19291930: 8 July 1930 to 22 August 19301931: 7 June 1931 to 23 August 19311932: 22 June 1932 to 19 August 19321933: 14 June 1933 to 17 August 19331934: 28 May 1934 to 5 September 19341935: 13 July 1935 to 22 August 19351936: 26 May 1936 to 29 August 19361937: 28 June 1937 to 3 September 19371938: 14 July 1938 to 21 September 19381939: 29 June 1939 to 23 August 19391940: 12 June 1940 to 11 September 19401941: 22 June 1941 to 10 August 19411942: 1 July 1942 to 20 August 19421943: 6 July 1943 to 27 July 19431944: 18 July 1944 to 8 September 19441945: 20 July 1945 to 2 September 19451946: 20 July 1946 to 23 August 19461949: 14 July 1949 to 5 August 19491951: 12 July 1951 to 22 August 19511952: 8 July 1952 to 12 August 19521922192619301934193819421946JanFebMarAprMayJunJulAugSepOctNovDec
For each year, a bar from the first to the last day at Roland West Portal meeting 30 C (86 F).
First to last qualifying date each year at Roland West Portal
YearFirst dateLast date
19221922-06-201922-08-28
19231923-07-011923-08-18
19241924-06-301924-09-04
19251925-06-201925-08-20
19261926-06-251926-08-25
19271927-07-171927-08-19
19281928-05-251928-09-02
19291929-07-171929-08-30
19301930-07-081930-08-22
19311931-06-071931-08-23
19321932-06-221932-08-19
19331933-06-141933-08-17
19341934-05-281934-09-05
19351935-07-131935-08-22
19361936-05-261936-08-29
19371937-06-281937-09-03
19381938-07-141938-09-21
19391939-06-291939-08-23
19401940-06-121940-09-11
19411941-06-221941-08-10
19421942-07-011942-08-20
19431943-07-061943-07-27
19441944-07-181944-09-08
19451945-07-201945-09-02
19461946-07-201946-08-23
19491949-07-141949-08-05
19511951-07-121951-08-22
19521952-07-081952-08-12

Every Fixed Threshold

Fixed thresholds at Roland West Portal
ThresholdYears with a qualifying dayMost days in a yearYearLatest year days
30 C (86 F): Days282519369
35 C (95 F): Days8219281
90 F (32.2 C): Days25919513
0 C (32 F): Ice days (max2879192263
0 C (32 F): Frost days (min282021929186
-10 C (14 F): Days with min2851192244
-20 C (-4 F): Days with min231619242
-30 C (-22 F): Days with min4319241
10 mm (0.39 in): Days with 10 mm or more rain2764193317
25 mm (0.98 in): Days with 25 mm or more rain272119332
50 mm (1.97 in): Days with 50 mm or more rain16619331
100 mm (3.94 in): Days with 100 mm or more rain1119331
10 cm (3.9 in): Days with 10 cm or more snowfall1140195116
25 cm (9.8 in): Days with 25 cm or more snowfall111119512
50 cm (19.7 in): Days with 50 cm or more snowfall4319371

Years with under 90 percent of days observed are left out of the most days column. Threshold history at this station starts in 1922.

Download the Data

  • Data for Roland West Portal 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).