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Data as of 2026-10-17
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Built 2026-10-19 (19 October 2026)

Roland Threshold Days by Year (CA005022480)

17 fixed thresholds counted per year at Roland (CA005022480): hot days, frost, tropical nights and heavy rain, with the most days in a year.

Key Facts for Roland Thresholds

  • Roland: days with 10 mm (0.39 in) or more of precipitation in 26 years, most in 1968 with 22.
  • Roland: days with a maximum temperature at or above 30 C (86 F) in 25 years, most in 1961 with 43.
  • Roland: days with a maximum temperature at or above 90 F (32.2 C) in 25 years, most in 1961 with 29.
  • Roland: days with a maximum temperature at or below 0 C (32 F) in 25 years, most in 1955 with 137.
  • 17 fixed thresholds have at least one qualifying day at Roland.
25 years with a qualifying day
Days at or above 30 C (86 F) per year at Roland Days per year at Roland with a maximum temperature at or above 30 C (86 F), with the decade average as a line. The most was 43 in 1961. 02040601952: 281953: 201954: 41955: 321956: 81957: 141958: 171959: 201960: 201961: 431962: 81963: 201964: 121965: 71966: 191967: 221968: 51969: 181970: 181971: 101972: 211973: 131974: 181975: 91976: 28195219551958196119641967197019731976
Days per year at Roland with a maximum temperature at or above 30 C (86 F), with the decade average as a line. The most was 43 in 1961.
Days at or above 30 C (86 F) per year at Roland
YearDaysDecade average
19522817.9
19532017.9
1954417.9
19553217.9
1956817.9
19571417.9
19581717.9
19592017.9
19602017.4
19614317.4
1962817.4
19632017.4
19641217.4
1965717.4
19661917.4
19672217.4
1968517.4
19691817.4
19701816.7
19711016.7
19722116.7
19731316.7
19741816.7
1975916.7
19762816.7
First to last qualifying date each year at Roland For each year, a bar from the first to the last day at Roland meeting 30 C (86 F). 1952: 26 April 1952 to 27 September 19521953: 6 May 1953 to 31 August 19531954: 23 June 1954 to 31 August 19541955: 13 May 1955 to 5 September 19551956: 21 May 1956 to 26 September 19561957: 30 April 1957 to 10 August 19571958: 12 May 1958 to 8 September 19581959: 17 May 1959 to 28 August 19591960: 12 May 1960 to 2 September 19601961: 20 May 1961 to 6 October 19611962: 26 June 1962 to 2 September 19621963: 30 May 1963 to 4 October 19631964: 17 May 1964 to 5 August 19641965: 13 May 1965 to 23 August 19651966: 21 May 1966 to 12 September 19661967: 3 June 1967 to 25 September 19671968: 1 May 1968 to 14 September 19681969: 14 May 1969 to 14 September 19691970: 17 May 1970 to 19 September 19701971: 3 June 1971 to 2 September 19711972: 16 May 1972 to 30 August 19721973: 17 May 1973 to 31 August 19731974: 19 June 1974 to 24 August 19741975: 20 June 1975 to 24 August 19751976: 9 May 1976 to 30 September 19761952195619601964196819721976JanFebMarAprMayJunJulAugSepOctNovDec
For each year, a bar from the first to the last day at Roland meeting 30 C (86 F).
First to last qualifying date each year at Roland
YearFirst dateLast date
19521952-04-261952-09-27
19531953-05-061953-08-31
19541954-06-231954-08-31
19551955-05-131955-09-05
19561956-05-211956-09-26
19571957-04-301957-08-10
19581958-05-121958-09-08
19591959-05-171959-08-28
19601960-05-121960-09-02
19611961-05-201961-10-06
19621962-06-261962-09-02
19631963-05-301963-10-04
19641964-05-171964-08-05
19651965-05-131965-08-23
19661966-05-211966-09-12
19671967-06-031967-09-25
19681968-05-011968-09-14
19691969-05-141969-09-14
19701970-05-171970-09-19
19711971-06-031971-09-02
19721972-05-161972-08-30
19731973-05-171973-08-31
19741974-06-191974-08-24
19751975-06-201975-08-24
19761976-05-091976-09-30

Every Fixed Threshold

Fixed thresholds at Roland
ThresholdYears with a qualifying dayMost days in a yearYearLatest year days
30 C (86 F): Days2543196128
35 C (95 F): Days16819613
90 F (32.2 C): Days252919618
100 F (37.8 C): Days4219521
0 C (32 F): Ice days (max25137195595
0 C (32 F): Frost days (min252101959187
-10 C (14 F): Days with min251371955108
-20 C (-4 F): Days with min2585195568
-30 C (-22 F): Days with min2527196615
-40 C (-40 F): Days with min1219662
20 C (68 F): Tropical nights (min14419603
10 mm (0.39 in): Days with 10 mm or more rain2622196816
25 mm (0.98 in): Days with 25 mm or more rain22719545
50 mm (1.97 in): Days with 50 mm or more rain4219661
100 mm (3.94 in): Days with 100 mm or more rain1119661
10 cm (3.9 in): Days with 10 cm or more snowfall20619551
25 cm (9.8 in): Days with 25 cm or more snowfall1119661

Years with under 90 percent of days observed are left out of the most days column. Threshold history at this station starts in 1952.

Download the Data

  • Data for Roland 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 (2026-10-17).