Heron Bay Weather Records (CA006043458)

Record envelope, standing records and threshold days for Heron Bay (CA006043458), Ontario, Canada, with 35 years of record.

Key Facts for Heron Bay

Heron Bay (CA006043458) is a weather station in Ontario, Canada at 48.67 latitude and -86.28 longitude, 215 m (705 ft) above sea level.
The station reports from 1886 to 1920, 35 years of record.
1,464 records set at Heron Bay 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, 48.67 latitude, -86.28 longitude.
Elevation: 215 m (705 ft).
Period of record: 1886 to 1920, 35 years.
Eligible elements: none yet.

Daily Record Envelope and 2026

0 days at or beyond a record

The band shows the record high and record low for each calendar day at Heron Bay. 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 Heron Bay, with 2026 drawn through them
Month	Highest record high	Lowest record low	2026 highest maximum	2026 lowest minimum
Jan	3.9 C (39.0 F)	-43.9 C (-47.0 F)	n/a	n/a
Feb	4.4 C (39.9 F)	-44.4 C (-47.9 F)	n/a	n/a
Mar	12.2 C (54.0 F)	-36.7 C (-34.1 F)	n/a	n/a
Apr	24.4 C (75.9 F)	-20.6 C (-5.1 F)	n/a	n/a
May	24.4 C (75.9 F)	-11.7 C (10.9 F)	n/a	n/a
Jun	26.7 C (80.1 F)	-6.7 C (19.9 F)	n/a	n/a
Jul	28.9 C (84.0 F)	-11.1 C (12.0 F)	n/a	n/a
Aug	28.3 C (82.9 F)	-5.6 C (21.9 F)	n/a	n/a
Sep	25.6 C (78.1 F)	-9.4 C (15.1 F)	n/a	n/a
Oct	22.2 C (72.0 F)	-12.8 C (9.0 F)	n/a	n/a
Nov	18.3 C (64.9 F)	-27.2 C (-17.0 F)	n/a	n/a
Dec	8.3 C (46.9 F)	-45.6 C (-50.1 F)	n/a	n/a

Which Years Hold Standing Records

1,464 standing records

1,464 records at Heron Bay still stand. 1917 holds the most, with 292.

Wettest Day of Each Month

Jan: 50.8 mm (2.0 in)

The wettest day on record for each calendar month at Heron Bay. The most was 50.8 mm (2.0 in) on 2 January 1895.

Record daily precipitation for each month at Heron Bay
Month	Record daily precipitation (mm)	Date
Jan	50.8 mm (2.0 in)	2 January 1895
Feb	50.8 mm (2.0 in)	26 February 1899
Mar	25.4 mm (1.0 in)	20 March 1901
Apr	25.4 mm (1.0 in)	29 April 1901
May	35.6 mm (1.4 in)	30 May 1895
Jun	33.0 mm (1.3 in)	2 June 1916
Jul	40.6 mm (1.6 in)	12 July 1891
Aug	44.5 mm (1.8 in)	5 August 1917
Sep	31.8 mm (1.3 in)	27 September 1901
Oct	39.4 mm (1.6 in)	7 October 1901
Nov	46.2 mm (1.8 in)	8 November 1915
Dec	25.4 mm (1.0 in)	28 December 1898

Period of Record Coverage

1914 to 1920

7 years of record at Heron Bay, 1914 to 1920. 3 years have data for under 90 percent of days and are left out of rankings: 1918, 1919, 1920.

Latest Records

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

Extremes by Year

1886 to 1920

Yearly extremes at Heron Bay: the record and the median year
Measure	Record	Year of the record	Median year	Years with a value
Hottest day (TXx)	28.9 C (84.0 F)	1914	27.8 C (82.0 F)	7
Coldest night (TNn)	-45.6 C (-50.1 F)	1917	-41.1 C (-42.0 F)	7
Wettest day (Rx1day)	50.8 mm (2.0 in)	1895	33.3 mm (1.3 in)	23
Wettest five days (Rx5day)	94.1 mm (3.7 in)	1891	56.8 mm (2.2 in)	23
Longest dry spell (CDD)	49 days	1919	23 days	23

Hottest day (TXx)

The hottest day of the year at Heron Bay, 1886 to 1920. The record is 28.9 C (84.0 F) in 1914, marked on the chart; the median year is 27.8 C (82.0 F).

Hottest day (TXx) at Heron Bay by year
Year	Hottest day (TXx)
1886	n/a
1887	n/a
1888	n/a
1891	n/a
1892	n/a
1893	n/a
1894	n/a
1895	n/a
1896	n/a
1897	n/a
1898	n/a
1899	n/a
1900	n/a
1901	n/a
1902	n/a
1913	n/a
1914	28.9 C (84.0 F)
1915	27.8 C (82.0 F)
1916	28.3 C (82.9 F)
1917	23.9 C (75.0 F)
1918	21.1 C (70.0 F)
1919	26.7 C (80.1 F)
1920	27.8 C (82.0 F)

Coldest night (TNn)

The coldest night of the year at Heron Bay, 1886 to 1920. The record is -45.6 C (-50.1 F) in 1917, marked on the chart; the median year is -41.1 C (-42.0 F).

Coldest night (TNn) at Heron Bay by year
Year	Coldest night (TNn)
1886	n/a
1887	n/a
1888	n/a
1891	n/a
1892	n/a
1893	n/a
1894	n/a
1895	n/a
1896	n/a
1897	n/a
1898	n/a
1899	n/a
1900	n/a
1901	n/a
1902	n/a
1913	n/a
1914	-44.4 C (-47.9 F)
1915	-41.1 C (-42.0 F)
1916	-39.4 C (-38.9 F)
1917	-45.6 C (-50.1 F)
1918	-43.9 C (-47.0 F)
1919	-32.2 C (-26.0 F)
1920	-35.6 C (-32.1 F)

Wettest day (Rx1day)

The wettest day of the year at Heron Bay, 1886 to 1920. The record is 50.8 mm (2.0 in) in 1895, marked on the chart; the median year is 33.3 mm (1.3 in).

Wettest day (Rx1day) at Heron Bay by year
Year	Wettest day (Rx1day)
1886	21.1 mm (0.8 in)
1887	25.4 mm (1.0 in)
1888	27.9 mm (1.1 in)
1891	40.6 mm (1.6 in)
1892	16.5 mm (0.6 in)
1893	27.9 mm (1.1 in)
1894	30.5 mm (1.2 in)
1895	50.8 mm (2.0 in)
1896	25.4 mm (1.0 in)
1897	20.3 mm (0.8 in)
1898	25.4 mm (1.0 in)
1899	50.8 mm (2.0 in)
1900	34.3 mm (1.4 in)
1901	39.4 mm (1.6 in)
1902	35.6 mm (1.4 in)
1913	23.1 mm (0.9 in)
1914	33.3 mm (1.3 in)
1915	46.2 mm (1.8 in)
1916	40.6 mm (1.6 in)
1917	45.7 mm (1.8 in)
1918	38.1 mm (1.5 in)
1919	38.4 mm (1.5 in)
1920	17.8 mm (0.7 in)

Wettest five days (Rx5day)

The wettest five days of the year at Heron Bay, 1886 to 1920. The record is 94.1 mm (3.7 in) in 1891, marked on the chart; the median year is 56.8 mm (2.2 in).

Wettest five days (Rx5day) at Heron Bay by year
Year	Wettest five days (Rx5day)
1886	36.3 mm (1.4 in)
1887	53.3 mm (2.1 in)
1888	50.8 mm (2.0 in)
1891	94.1 mm (3.7 in)
1892	20.3 mm (0.8 in)
1893	40.9 mm (1.6 in)
1894	58.4 mm (2.3 in)
1895	60.9 mm (2.4 in)
1896	53.4 mm (2.1 in)
1897	33.0 mm (1.3 in)
1898	46.5 mm (1.8 in)
1899	60.9 mm (2.4 in)
1900	58.5 mm (2.3 in)
1901	62.3 mm (2.5 in)
1902	58.4 mm (2.3 in)
1913	41.6 mm (1.6 in)
1914	56.8 mm (2.2 in)
1915	71.1 mm (2.8 in)
1916	58.3 mm (2.3 in)
1917	71.1 mm (2.8 in)
1918	54.6 mm (2.1 in)
1919	79.0 mm (3.1 in)
1920	28.0 mm (1.1 in)

Longest dry spell (CDD)

The longest dry spell of the year at Heron Bay, 1886 to 1920. The record is 49 days in 1919, marked on the chart; the median year is 23 days.

Longest dry spell (CDD) at Heron Bay by year
Year	Longest dry spell (CDD)
1886	10 days
1887	25 days
1888	18 days
1891	17 days
1892	26 days
1893	13 days
1894	27 days
1895	23 days
1896	26 days
1897	25 days
1898	30 days
1899	18 days
1900	23 days
1901	22 days
1902	8 days
1913	16 days
1914	24 days
1915	31 days
1916	13 days
1917	25 days
1918	25 days
1919	49 days
1920	11 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 Heron Bay standing records by year: CSV or JSON. Field meanings are on the data page.
Data for Heron Bay 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 2026-10-15 (15 October 2026). Records are computed by this site and are not official.

Data as of 2026-10-15. Last revised 15 October 2026 (2026-10-15).

Year	Days with data	Share of year	Complete
1914	340	93%	Yes
1915	365	100%	Yes
1916	364	99%	Yes
1917	361	99%	Yes
1918	264	72%	No
1919	212	58%	No
1920	239	65%	No