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

Aylmer Threshold Days by Year (CA006130409)

15 fixed thresholds counted per year at Aylmer (CA006130409): hot days, frost, tropical nights and heavy rain, with the most days in a year.

Key Facts for Aylmer Thresholds

  • Aylmer: days with 10 mm (0.39 in) or more of precipitation in 13 years, most in 1975 with 46.
  • Aylmer: days with 25 mm (0.98 in) or more of precipitation in 13 years, most in 1954 with 14.
  • Aylmer: days with 10 cm (3.9 in) or more of snowfall in 13 years, most in 1976 with 11.
  • Aylmer: days with a maximum temperature at or above 30 C (86 F) in 11 years, most in 1955 with 42.
  • 15 fixed thresholds have at least one qualifying day at Aylmer.
11 years with a qualifying day
Days at or above 30 C (86 F) per year at Aylmer Days per year at Aylmer with a maximum temperature at or above 30 C (86 F), with the decade average as a line. The most was 42 in 1955. 02040601952: 281953: 201954: 171955: 421972: 61973: 151974: 81975: 111976: 81977: 181978: 12195219541972197419761978
Days per year at Aylmer with a maximum temperature at or above 30 C (86 F), with the decade average as a line. The most was 42 in 1955.
Days at or above 30 C (86 F) per year at Aylmer
YearDaysDecade average
19522826.8
19532026.8
19541726.8
19554226.8
1972611.1
19731511.1
1974811.1
19751111.1
1976811.1
19771811.1
19781211.1
First to last qualifying date each year at Aylmer For each year, a bar from the first to the last day at Aylmer meeting 30 C (86 F). 1952: 15 June 1952 to 13 September 19521953: 20 June 1953 to 4 September 19531954: 12 June 1954 to 6 September 19541955: 6 June 1955 to 19 September 19551972: 12 July 1972 to 23 July 19721973: 11 June 1973 to 4 September 19731974: 3 July 1974 to 21 August 19741975: 22 June 1975 to 2 August 19751976: 8 June 1976 to 8 September 19761977: 17 May 1977 to 1 September 19771978: 27 May 1978 to 6 September 1978195219541972197419761978JanFebMarAprMayJunJulAugSepOctNovDec
For each year, a bar from the first to the last day at Aylmer meeting 30 C (86 F).
First to last qualifying date each year at Aylmer
YearFirst dateLast date
19521952-06-151952-09-13
19531953-06-201953-09-04
19541954-06-121954-09-06
19551955-06-061955-09-19
19721972-07-121972-07-23
19731973-06-111973-09-04
19741974-07-031974-08-21
19751975-06-221975-08-02
19761976-06-081976-09-08
19771977-05-171977-09-01
19781978-05-271978-09-06

Every Fixed Threshold

Fixed thresholds at Aylmer
ThresholdYears with a qualifying dayMost days in a yearYearLatest year days
30 C (86 F): Days1142195512
35 C (95 F): Days2519555
90 F (32.2 C): Days102819551
0 C (32 F): Ice days (max1176197876
0 C (32 F): Frost days (min111651976155
-10 C (14 F): Days with min1162197862
-20 C (-4 F): Days with min8919766
-30 C (-22 F): Days with min1119761
20 C (68 F): Tropical nights (min1120195511
25 C (77 F): Days with min1119521
10 mm (0.39 in): Days with 10 mm or more rain1346197532
25 mm (0.98 in): Days with 25 mm or more rain131419545
50 mm (1.97 in): Days with 50 mm or more rain6219542
10 cm (3.9 in): Days with 10 cm or more snowfall131119763
25 cm (9.8 in): Days with 25 cm or more snowfall2119541

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 Aylmer 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).