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Built 2026-10-19 (19 October 2026)

North Bay A Threshold Days by Year (CA006085700)

14 fixed thresholds counted per year at North Bay A (CA006085700): hot days, frost, tropical nights and heavy rain, with the most days in a year.

Key Facts for North Bay A Thresholds

  • North Bay A: days with a maximum temperature at or below 0 C (32 F) in 45 years, most in 1940 with 127.
  • North Bay A: nights with a minimum temperature at or below 0 C (32 F) in 45 years, most in 1972 with 206.
  • North Bay A: nights with a minimum temperature at or below -10 C (14 F) in 45 years, most in 1972 with 113.
  • North Bay A: nights with a minimum temperature at or below -20 C (-4 F) in 45 years, most in 1976 with 57.
  • 14 fixed thresholds have at least one qualifying day at North Bay A.
28 years with a qualifying day
Days at or above 30 C (86 F) per year at North Bay A Days per year at North Bay A with a maximum temperature at or above 30 C (86 F), with the decade average as a line. The most was 11 in 1949. 0510151939: 41940: 21941: 51942: 11943: 21944: 101945: 31946: 51947: 91948: 51949: 111952: 41953: 81955: 101956: 11959: 11962: 61963: 101964: 51966: 81968: 31970: 31975: 41976: 11977: 21978: 31979: 21983: 31939194219451948195319591964197019771983
Days per year at North Bay A with a maximum temperature at or above 30 C (86 F), with the decade average as a line. The most was 11 in 1949.
Days at or above 30 C (86 F) per year at North Bay A
YearDaysDecade average
193944
194025.3
194155.3
194215.3
194325.3
1944105.3
194535.3
194655.3
194795.3
194855.3
1949115.3
195244.8
195384.8
1955104.8
195614.8
195914.8
196266.4
1963106.4
196456.4
196686.4
196836.4
197032.5
197542.5
197612.5
197722.5
197832.5
197922.5
198333
First to last qualifying date each year at North Bay A For each year, a bar from the first to the last day at North Bay A meeting 30 C (86 F). 1939: 6 July 1939 to 15 September 19391940: 22 July 1940 to 23 July 19401941: 21 June 1941 to 25 July 19411942: 18 July 1942 to 18 July 19421943: 10 July 1943 to 11 July 19431944: 27 June 1944 to 15 August 19441945: 24 June 1945 to 6 September 19451946: 28 June 1946 to 8 August 19461947: 29 June 1947 to 24 August 19471948: 10 July 1948 to 27 August 19481949: 12 June 1949 to 27 August 19491952: 6 July 1952 to 13 July 19521953: 16 July 1953 to 4 September 19531955: 7 June 1955 to 20 August 19551956: 13 June 1956 to 13 June 19561959: 4 September 1959 to 4 September 19591962: 17 May 1962 to 31 August 19621963: 26 June 1963 to 28 July 19631964: 30 June 1964 to 24 July 19641966: 24 June 1966 to 12 July 19661968: 16 July 1968 to 18 July 19681970: 10 August 1970 to 12 August 19701975: 5 July 1975 to 1 August 19751976: 6 June 1976 to 6 June 19761977: 21 May 1977 to 20 July 19771978: 7 July 1978 to 15 August 19781979: 23 July 1979 to 24 July 19791983: 15 June 1983 to 15 July 19831939194319471953196219681977JanFebMarAprMayJunJulAugSepOctNovDec
For each year, a bar from the first to the last day at North Bay A meeting 30 C (86 F).
First to last qualifying date each year at North Bay A
YearFirst dateLast date
19391939-07-061939-09-15
19401940-07-221940-07-23
19411941-06-211941-07-25
19421942-07-181942-07-18
19431943-07-101943-07-11
19441944-06-271944-08-15
19451945-06-241945-09-06
19461946-06-281946-08-08
19471947-06-291947-08-24
19481948-07-101948-08-27
19491949-06-121949-08-27
19521952-07-061952-07-13
19531953-07-161953-09-04
19551955-06-071955-08-20
19561956-06-131956-06-13
19591959-09-041959-09-04
19621962-05-171962-08-31
19631963-06-261963-07-28
19641964-06-301964-07-24
19661966-06-241966-07-12
19681968-07-161968-07-18
19701970-08-101970-08-12
19751975-07-051975-08-01
19761976-06-061976-06-06
19771977-05-211977-07-20
19781978-07-071978-08-15
19791979-07-231979-07-24
19831983-06-151983-07-15

Every Fixed Threshold

Fixed thresholds at North Bay A
ThresholdYears with a qualifying dayMost days in a yearYearLatest year days
30 C (86 F): Days281119493
90 F (32.2 C): Days10219441
0 C (32 F): Ice days (max45127194098
0 C (32 F): Frost days (min452061972181
-10 C (14 F): Days with min45113197285
-20 C (-4 F): Days with min4557197631
-30 C (-22 F): Days with min401119482
-40 C (-40 F): Days with min1119421
20 C (68 F): Tropical nights (min23519551
10 mm (0.39 in): Days with 10 mm or more rain4540194127
25 mm (0.98 in): Days with 25 mm or more rain451019417
50 mm (1.97 in): Days with 50 mm or more rain19319472
10 cm (3.9 in): Days with 10 cm or more snowfall451419722
25 cm (9.8 in): Days with 25 cm or more snowfall8319431

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 North Bay A 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).