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Built 2026-10-19 (19 October 2026)

Waterloo Wellington A Threshold Days by Year (CA006149387)

12 fixed thresholds counted per year at Waterloo Wellington A (CA006149387): hot days, frost, tropical nights and heavy rain, with the most days in a year.

Key Facts for Waterloo Wellington A Thresholds

  • Waterloo Wellington A: days with a maximum temperature at or below 0 C (32 F) in 13 years, most in 1978 with 93.
  • Waterloo Wellington A: nights with a minimum temperature at or below 0 C (32 F) in 13 years, most in 1978 with 184.
  • Waterloo Wellington A: nights with a minimum temperature at or below -10 C (14 F) in 13 years, most in 1978 with 74.
  • Waterloo Wellington A: nights with a minimum temperature at or below -20 C (-4 F) in 13 years, most in 1973 with 17.
  • 12 fixed thresholds have at least one qualifying day at Waterloo Wellington A.
12 years with a qualifying day
Days at or above 30 C (86 F) per year at Waterloo Wellington A Days per year at Waterloo Wellington A with a maximum temperature at or above 30 C (86 F), with the decade average as a line. The most was 16 in 1973. 051015201971: 111972: 41973: 161974: 81975: 111976: 51977: 71978: 71979: 31980: 31981: 71983: 13197119731975197719791981
Days per year at Waterloo Wellington A with a maximum temperature at or above 30 C (86 F), with the decade average as a line. The most was 16 in 1973.
Days at or above 30 C (86 F) per year at Waterloo Wellington A
YearDaysDecade average
1971118
197248
1973168
197488
1975118
197658
197778
197878
197938
198037.7
198177.7
1983137.7
First to last qualifying date each year at Waterloo Wellington A For each year, a bar from the first to the last day at Waterloo Wellington A meeting 30 C (86 F). 1971: 19 June 1971 to 8 September 19711972: 12 July 1972 to 23 July 19721973: 11 June 1973 to 4 September 19731974: 3 July 1974 to 21 August 19741975: 24 May 1975 to 2 August 19751976: 8 June 1976 to 8 September 19761977: 17 May 1977 to 28 August 19771978: 27 June 1978 to 19 August 19781979: 12 July 1979 to 24 July 19791980: 26 June 1980 to 20 July 19801981: 15 June 1981 to 19 July 19811983: 23 June 1983 to 10 September 1983197119731975197719791981JanFebMarAprMayJunJulAugSepOctNovDec
For each year, a bar from the first to the last day at Waterloo Wellington A meeting 30 C (86 F).
First to last qualifying date each year at Waterloo Wellington A
YearFirst dateLast date
19711971-06-191971-09-08
19721972-07-121972-07-23
19731973-06-111973-09-04
19741974-07-031974-08-21
19751975-05-241975-08-02
19761976-06-081976-09-08
19771977-05-171977-08-28
19781978-06-271978-08-19
19791979-07-121979-07-24
19801980-06-261980-07-20
19811981-06-151981-07-19
19831983-06-231983-09-10

Every Fixed Threshold

Fixed thresholds at Waterloo Wellington A
ThresholdYears with a qualifying dayMost days in a yearYearLatest year days
30 C (86 F): Days1216197313
90 F (32.2 C): Days7719733
0 C (32 F): Ice days (max1393197862
0 C (32 F): Frost days (min131841978164
-10 C (14 F): Days with min1374197839
-20 C (-4 F): Days with min131719735
-30 C (-22 F): Days with min2219761
20 C (68 F): Tropical nights (min11719837
10 mm (0.39 in): Days with 10 mm or more rain1338198236
25 mm (0.98 in): Days with 25 mm or more rain13819777
50 mm (1.97 in): Days with 50 mm or more rain3219761
10 cm (3.9 in): Days with 10 cm or more snowfall12419733

Years with under 90 percent of days observed are left out of the most days column. Threshold history at this station starts in 1971.

Download the Data

  • Data for Waterloo Wellington 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).