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Data as of 2025-12-31
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Built 2026-10-15 (15 October 2026)

Thornhill Grandview Weather Records (CA006158255)

Record envelope, standing records and threshold days for Thornhill Grandview (CA006158255), Ontario, Canada, with 42 years of record.

Key Facts for Thornhill Grandview

  • Thornhill Grandview (CA006158255) is a weather station in Ontario, Canada at 43.80 latitude and -79.42 longitude, 199 m (653 ft) above sea level.
  • The station reports from 1965 to 2006, 42 years of record.
  • 0 records set at Thornhill Grandview still stand.
  • Records are tracked for no element yet: an element needs 30 years of data to be eligible.

About the Station

  • Location: Ontario, Canada, 43.80 latitude, -79.42 longitude.
  • Elevation: 199 m (653 ft).
  • Period of record: 1965 to 2006, 42 years.
  • Eligible elements: none yet.

Daily Record Envelope and 2026

0 days at or beyond a record
Daily record high and record low at Thornhill Grandview, with 2026 drawn through them The band shows the record high and record low for each calendar day at Thornhill Grandview. The lines show the 2026 daily maximum and minimum. 0 days in 2026 matched or passed a record. Temperatures are in degrees Celsius. 000111 JanFebMarAprMayJunJulAugSepOctNovDec
The band shows the record high and record low for each calendar day at Thornhill Grandview. The lines show the 2026 daily maximum and minimum. 0 days in 2026 matched or passed a record. Temperatures are in degrees Celsius.
Daily record high and record low at Thornhill Grandview, with 2026 drawn through them
MonthHighest record highLowest record low2026 highest maximum2026 lowest minimum
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Which Years Hold Standing Records

0 standing records
Standing records at Thornhill Grandview by the year they were set 0 records at Thornhill Grandview still stand. 00000000000
0 records at Thornhill Grandview still stand.
Standing records at Thornhill Grandview by the year they were set
Year setStanding records

Wettest Day of Each Month

Sep: 83.4 mm (3.3 in)
Record daily precipitation for each month at Thornhill Grandview The wettest day on record for each calendar month at Thornhill Grandview. The most was 83.4 mm (3.3 in) on 2 September 1981. 0255075100 Jan: 50.0 mm (2.0 in), 14 January 1968 Jan Feb: 48.4 mm (1.9 in), 10 February 1981 Feb Mar: 32.8 mm (1.3 in), 12 March 1977 Mar Apr: 35.8 mm (1.4 in), 18 April 1975 Apr May: 35.1 mm (1.4 in), 18 May 1969 May Jun: 44.2 mm (1.7 in), 25 June 1971 Jun Jul: 72.8 mm (2.9 in), 28 July 1980 Jul Aug: 47.0 mm (1.9 in), 22 August 1968 Aug Sep: 83.4 mm (3.3 in), 2 September 1981 Sep Oct: 35.3 mm (1.4 in), 7 October 1965 Oct Nov: 42.4 mm (1.7 in), 7 November 1977 Nov Dec: 36.3 mm (1.4 in), 12 December 1972 Dec
The wettest day on record for each calendar month at Thornhill Grandview. The most was 83.4 mm (3.3 in) on 2 September 1981.
Record daily precipitation for each month at Thornhill Grandview
MonthRecord daily precipitation (mm)Date
Jan50.0 mm (2.0 in)14 January 1968
Feb48.4 mm (1.9 in)10 February 1981
Mar32.8 mm (1.3 in)12 March 1977
Apr35.8 mm (1.4 in)18 April 1975
May35.1 mm (1.4 in)18 May 1969
Jun44.2 mm (1.7 in)25 June 1971
Jul72.8 mm (2.9 in)28 July 1980
Aug47.0 mm (1.9 in)22 August 1968
Sep83.4 mm (3.3 in)2 September 1981
Oct35.3 mm (1.4 in)7 October 1965
Nov42.4 mm (1.7 in)7 November 1977
Dec36.3 mm (1.4 in)12 December 1972

Latest Records

0

No records were set at this station in the latest data.

Extremes by Year

1965 to 1983
Yearly extremes at Thornhill Grandview: the record and the median year
MeasureRecordYear of the recordMedian yearYears with a value
Wettest day (Rx1day)83.4 mm (3.3 in)198138.0 mm (1.5 in)19
Wettest five days (Rx5day)147.6 mm (5.8 in)198158.6 mm (2.3 in)19
Longest dry spell (CDD)27 days197316 days19

Wettest day (Rx1day)

Wettest day (Rx1day) at Thornhill Grandview by year The wettest day of the year at Thornhill Grandview, 1965 to 1983. The record is 83.4 mm (3.3 in) in 1981, marked on the chart; the median year is 38.0 mm (1.5 in). 204060801001965197019751980Record: 83.4 mm (3.3 in) in 1981
The wettest day of the year at Thornhill Grandview, 1965 to 1983. The record is 83.4 mm (3.3 in) in 1981, marked on the chart; the median year is 38.0 mm (1.5 in).
Wettest day (Rx1day) at Thornhill Grandview by year
YearWettest day (Rx1day)
196535.3 mm (1.4 in)
196638.6 mm (1.5 in)
196737.8 mm (1.5 in)
196850.0 mm (2.0 in)
196935.1 mm (1.4 in)
197038.1 mm (1.5 in)
197169.6 mm (2.7 in)
197236.3 mm (1.4 in)
197322.6 mm (0.9 in)
197434.5 mm (1.4 in)
197535.8 mm (1.4 in)
197634.0 mm (1.3 in)
197742.4 mm (1.7 in)
197846.0 mm (1.8 in)
197939.6 mm (1.6 in)
198072.8 mm (2.9 in)
198183.4 mm (3.3 in)
198238.0 mm (1.5 in)
198334.4 mm (1.4 in)

Wettest five days (Rx5day)

Wettest five days (Rx5day) at Thornhill Grandview by year The wettest five days of the year at Thornhill Grandview, 1965 to 1983. The record is 147.6 mm (5.8 in) in 1981, marked on the chart; the median year is 58.6 mm (2.3 in). 0501001501965197019751980Record: 147.6 mm (5.8 in) in 1981
The wettest five days of the year at Thornhill Grandview, 1965 to 1983. The record is 147.6 mm (5.8 in) in 1981, marked on the chart; the median year is 58.6 mm (2.3 in).
Wettest five days (Rx5day) at Thornhill Grandview by year
YearWettest five days (Rx5day)
196558.2 mm (2.3 in)
196671.3 mm (2.8 in)
196759.9 mm (2.4 in)
196857.9 mm (2.3 in)
196949.3 mm (1.9 in)
197042.2 mm (1.7 in)
197169.6 mm (2.7 in)
197250.0 mm (2.0 in)
197372.1 mm (2.8 in)
197456.6 mm (2.2 in)
197543.7 mm (1.7 in)
197658.6 mm (2.3 in)
197760.2 mm (2.4 in)
197882.2 mm (3.2 in)
197977.2 mm (3.0 in)
198086.5 mm (3.4 in)
1981147.6 mm (5.8 in)
198257.0 mm (2.2 in)
198349.3 mm (1.9 in)

Longest dry spell (CDD)

Longest dry spell (CDD) at Thornhill Grandview by year The longest dry spell of the year at Thornhill Grandview, 1965 to 1983. The record is 27 days in 1973, marked on the chart; the median year is 16 days. 510152025301965197019751980Record: 27 days in 1973
The longest dry spell of the year at Thornhill Grandview, 1965 to 1983. The record is 27 days in 1973, marked on the chart; the median year is 16 days.
Longest dry spell (CDD) at Thornhill Grandview by year
YearLongest dry spell (CDD)
19659 days
196618 days
196721 days
196813 days
196924 days
197016 days
197115 days
197216 days
197327 days
197420 days
197513 days
197613 days
197722 days
197818 days
197916 days
198018 days
198111 days
198218 days
198315 days

Each chart shows one value per year; the dot marks the record year. TXx is the hottest daily maximum, TNn the coldest daily minimum, Rx1day and Rx5day the largest one-day and five-day rain totals, and CDD the longest run of days with less than 1 mm of rain. A year with missing days can understate an extreme.

Download the Data

  • Data for Thornhill Grandview standing records by year: CSV or JSON. Field meanings are on the data page.
  • Data for Thornhill Grandview 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 2026-10-13 (13 October 2026). Records are computed by this site and are not official.

Data as of . Last revised (2025-12-31).