Sarnia Weather Records (CA006127513)

Record envelope, standing records and threshold days for Sarnia (CA006127513), Ontario, Canada, with 80 years of record.

Key Facts for Sarnia

Sarnia (CA006127513) is a weather station in Ontario, Canada at 42.97 latitude and -82.37 longitude, 191 m (627 ft) above sea level.
The station reports from 1882 to 1961, 80 years of record.
1,464 records set at Sarnia still stand.
Records are tracked for prcp, snow: an element needs 30 years of data to be eligible.
Sarnia tied a daily record snowfall of 1.3 cm (0.5 in) on 28 December 1960.

About the Station

Location: Ontario, Canada, 42.97 latitude, -82.37 longitude.
Elevation: 191 m (627 ft).
Period of record: 1882 to 1961, 80 years.
Eligible elements: prcp, snow.

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 Sarnia. 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 Sarnia, with 2026 drawn through them
Month	Highest record high	Lowest record low	2026 highest maximum	2026 lowest minimum
Jan	18.9 C (66.0 F)	-23.9 C (-11.0 F)	n/a	n/a
Feb	15.0 C (59.0 F)	-26.1 C (-15.0 F)	n/a	n/a
Mar	23.9 C (75.0 F)	-19.4 C (-2.9 F)	n/a	n/a
Apr	30.0 C (86.0 F)	-11.7 C (10.9 F)	n/a	n/a
May	32.2 C (90.0 F)	-3.3 C (26.1 F)	n/a	n/a
Jun	36.7 C (98.1 F)	0.0 C (32.0 F)	n/a	n/a
Jul	35.6 C (96.1 F)	4.4 C (39.9 F)	n/a	n/a
Aug	36.7 C (98.1 F)	3.3 C (37.9 F)	n/a	n/a
Sep	37.2 C (99.0 F)	-0.6 C (30.9 F)	n/a	n/a
Oct	30.0 C (86.0 F)	-5.0 C (23.0 F)	n/a	n/a
Nov	26.7 C (80.1 F)	-15.0 C (5.0 F)	n/a	n/a
Dec	16.1 C (61.0 F)	-25.0 C (-13.0 F)	n/a	n/a

Which Years Hold Standing Records

1,464 standing records

1,464 records at Sarnia still stand. 1949 holds the most, with 145.

All-Time Record Progression

1 new records

1 all-time records were set at Sarnia between 12 December 1960 and 12 December 1960. Each dot is a new record.

Wettest Day of Each Month

May: 97.8 mm (3.9 in)

The wettest day on record for each calendar month at Sarnia. The most was 97.8 mm (3.9 in) on 31 May 1889.

Record daily precipitation for each month at Sarnia
Month	Record daily precipitation (mm)	Date
Jan	38.1 mm (1.5 in)	16 January 1906
Feb	36.6 mm (1.4 in)	10 February 1887
Mar	36.6 mm (1.4 in)	7 March 1904
Apr	44.7 mm (1.8 in)	24 April 1960
May	97.8 mm (3.9 in)	31 May 1889
Jun	54.6 mm (2.1 in)	20 June 1956
Jul	70.9 mm (2.8 in)	23 July 1959
Aug	63.5 mm (2.5 in)	20 August 1904
Sep	85.1 mm (3.4 in)	10 September 1950
Oct	53.3 mm (2.1 in)	11 October 1949
Nov	48.0 mm (1.9 in)	13 November 1959
Dec	48.3 mm (1.9 in)	12 December 1960

Period of Record Coverage

1926 to 1961

16 years of record at Sarnia, 1926 to 1961. 4 years have data for under 90 percent of days and are left out of rankings: 1926, 1927, 1948, 1961.

Days with data per year at Sarnia
Year	Days with data	Share of year	Complete
1926	60	16%	No
1927	182	50%	No
1948	61	17%	No
1949	343	94%	Yes
1950	340	93%	Yes
1951	337	92%	Yes
1952	356	97%	Yes
1953	365	100%	Yes
1954	365	100%	Yes
1955	365	100%	Yes
1956	365	100%	Yes
1957	363	99%	Yes
1958	363	99%	Yes
1959	356	98%	Yes
1960	338	92%	Yes
1961	29	8%	No

Latest Records

Latest records at Sarnia
Date	Station	Record	Value	Beat old record by	Old record stood	Significance
28 December 1960	Sarnia, CA	daily snowfall (Tie)	1.3 cm (0.5 in)	tie	3 years	1 of 100 (Routine)
20 December 1960	Sarnia, CA	daily snowfall	25.4 cm (10.0 in)	17.0 cm (6.7 in)	9 years	45 of 100 (Notable)
20 December 1960	Sarnia, CA	daily rain	25.4 mm (1.0 in)	0.8 mm (0.03 in)	11 years	11 of 100 (Routine)
12 December 1960	Sarnia, CA	all-time snowfall	48.3 cm (19.0 in)	20.4 cm (8.0 in)	56 years	83 of 100 (Exceptional)
12 December 1960	Sarnia, CA	monthly rain	48.3 mm (1.9 in)	20.9 mm (0.8 in)	75 years	73 of 100 (Major)
6 November 1960	Sarnia, CA	daily snowfall	22.9 cm (9.0 in)	2.6 cm (1.0 in)	57 years	28 of 100 (Routine)
6 November 1960	Sarnia, CA	daily rain	24.4 mm (1.0 in)	1.5 mm (0.06 in)	9 years	10 of 100 (Routine)
14 August 1960	Sarnia, CA	daily rain	11.9 mm (0.5 in)	3.5 mm (0.14 in)	6 years	11 of 100 (Routine)
16 June 1960	Sarnia, CA	daily rain	27.4 mm (1.1 in)	11.4 mm (0.4 in)	4 years	18 of 100 (Routine)
24 April 1960	Sarnia, CA	monthly rain	44.7 mm (1.8 in)	6.3 mm (0.25 in)	3 years	26 of 100 (Routine)
8 April 1960	Sarnia, CA	daily snowfall (Tie)	1.3 cm (0.5 in)	tie	2 years	1 of 100 (Routine)
24 March 1960	Sarnia, CA	daily snowfall	6.9 cm (2.7 in)	0.5 cm (0.2 in)	76 years	31 of 100 (Routine)
16 March 1960	Sarnia, CA	daily snowfall	7.9 cm (3.1 in)	2.8 cm (1.1 in)	1 year	13 of 100 (Routine)
16 March 1960	Sarnia, CA	daily rain	7.9 mm (0.31 in)	2.8 mm (0.11 in)	1 year	11 of 100 (Routine)
3 March 1960	Sarnia, CA	daily snowfall	14.0 cm (5.5 in)	8.9 cm (3.5 in)	6 years	27 of 100 (Routine)
25 February 1960	Sarnia, CA	daily snowfall	15.2 cm (6.0 in)	7.6 cm (3.0 in)	74 years	44 of 100 (Notable)
18 January 1960	Sarnia, CA	daily snowfall	10.2 cm (4.0 in)	2.6 cm (1.0 in)	32 years	22 of 100 (Routine)
15 January 1960	Sarnia, CA	daily rain	9.9 mm (0.39 in)	3.0 mm (0.12 in)	10 years	16 of 100 (Routine)
12 January 1960	Sarnia, CA	daily rain	24.1 mm (0.9 in)	9.4 mm (0.37 in)	74 years	20 of 100 (Routine)
28 December 1959	Sarnia, CA	daily snowfall (Tie)	1.3 cm (0.5 in)	tie	1 year	1 of 100 (Routine)

Extremes by Year

1882 to 1961

Yearly extremes at Sarnia: the record and the median year
Measure	Record	Year of the record	Median year	Years with a value
Hottest day (TXx)	37.2 C (99.0 F)	1953	33.6 C (92.5 F)	16
Coldest night (TNn)	-26.1 C (-15.0 F)	1959	-19.7 C (-3.5 F)	16
Wettest day (Rx1day)	97.8 mm (3.9 in)	1889	44.5 mm (1.8 in)	44
Wettest five days (Rx5day)	155.7 mm (6.1 in)	1950	63.8 mm (2.5 in)	44
Longest dry spell (CDD)	53 days	1899	21 days	44

Hottest day (TXx)

The hottest day of the year at Sarnia, 1882 to 1961. The record is 37.2 C (99.0 F) in 1953, marked on the chart; the median year is 33.6 C (92.5 F).

Hottest day (TXx) at Sarnia by year
Year	Hottest day (TXx)
1882	n/a
1883	n/a
1884	n/a
1885	n/a
1886	n/a
1887	n/a
1888	n/a
1889	n/a
1890	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
1903	n/a
1904	n/a
1905	n/a
1906	n/a
1907	n/a
1908	n/a
1909	n/a
1926	15.6 C (60.1 F)
1927	34.4 C (93.9 F)
1948	20.0 C (68.0 F)
1949	35.0 C (95.0 F)
1950	33.9 C (93.0 F)
1951	33.3 C (91.9 F)
1952	36.7 C (98.1 F)
1953	37.2 C (99.0 F)
1954	34.4 C (93.9 F)
1955	36.7 C (98.1 F)
1956	33.3 C (91.9 F)
1957	33.9 C (93.0 F)
1958	31.1 C (88.0 F)
1959	33.3 C (91.9 F)
1960	32.8 C (91.0 F)
1961	7.2 C (45.0 F)

Coldest night (TNn)

The coldest night of the year at Sarnia, 1882 to 1961. The record is -26.1 C (-15.0 F) in 1959, marked on the chart; the median year is -19.7 C (-3.5 F).

Coldest night (TNn) at Sarnia by year
Year	Coldest night (TNn)
1882	n/a
1883	n/a
1884	n/a
1885	n/a
1886	n/a
1887	n/a
1888	n/a
1889	n/a
1890	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
1903	n/a
1904	n/a
1905	n/a
1906	n/a
1907	n/a
1908	n/a
1909	n/a
1926	-16.1 C (3.0 F)
1927	-23.3 C (-9.9 F)
1948	-17.8 C (0.0 F)
1949	-18.3 C (-0.9 F)
1950	-18.9 C (-2.0 F)
1951	-23.9 C (-11.0 F)
1952	-15.6 C (3.9 F)
1953	-15.6 C (3.9 F)
1954	-22.2 C (-8.0 F)
1955	-19.4 C (-2.9 F)
1956	-20.0 C (-4.0 F)
1957	-23.9 C (-11.0 F)
1958	-21.7 C (-7.1 F)
1959	-26.1 C (-15.0 F)
1960	-25.0 C (-13.0 F)
1961	-19.4 C (-2.9 F)

Wettest day (Rx1day)

The wettest day of the year at Sarnia, 1882 to 1961. The record is 97.8 mm (3.9 in) in 1889, marked on the chart; the median year is 44.5 mm (1.8 in).

Wettest day (Rx1day) at Sarnia by year
Year	Wettest day (Rx1day)
1882	49.5 mm (1.9 in)
1883	28.7 mm (1.1 in)
1884	35.1 mm (1.4 in)
1885	56.9 mm (2.2 in)
1886	35.6 mm (1.4 in)
1887	36.6 mm (1.4 in)
1888	38.1 mm (1.5 in)
1889	97.8 mm (3.9 in)
1890	42.4 mm (1.7 in)
1891	52.1 mm (2.1 in)
1892	45.7 mm (1.8 in)
1893	48.5 mm (1.9 in)
1894	82.6 mm (3.3 in)
1895	36.8 mm (1.4 in)
1896	38.1 mm (1.5 in)
1897	53.1 mm (2.1 in)
1898	37.8 mm (1.5 in)
1899	33.0 mm (1.3 in)
1900	25.4 mm (1.0 in)
1901	29.7 mm (1.2 in)
1902	47.2 mm (1.9 in)
1903	30.5 mm (1.2 in)
1904	63.5 mm (2.5 in)
1905	52.8 mm (2.1 in)
1906	49.3 mm (1.9 in)
1907	47.0 mm (1.9 in)
1908	10.2 mm (0.4 in)
1909	38.4 mm (1.5 in)
1926	26.7 mm (1.1 in)
1927	50.5 mm (2.0 in)
1948	37.8 mm (1.5 in)
1949	53.3 mm (2.1 in)
1950	85.1 mm (3.4 in)
1951	53.3 mm (2.1 in)
1952	41.9 mm (1.6 in)
1953	41.1 mm (1.6 in)
1954	43.2 mm (1.7 in)
1955	53.3 mm (2.1 in)
1956	54.6 mm (2.1 in)
1957	38.6 mm (1.5 in)
1958	54.4 mm (2.1 in)
1959	70.9 mm (2.8 in)
1960	48.3 mm (1.9 in)
1961	5.1 mm (0.20 in)

Wettest five days (Rx5day)

The wettest five days of the year at Sarnia, 1882 to 1961. The record is 155.7 mm (6.1 in) in 1950, marked on the chart; the median year is 63.8 mm (2.5 in).

Wettest five days (Rx5day) at Sarnia by year
Year	Wettest five days (Rx5day)
1882	74.7 mm (2.9 in)
1883	51.8 mm (2.0 in)
1884	63.8 mm (2.5 in)
1885	59.9 mm (2.4 in)
1886	45.0 mm (1.8 in)
1887	81.3 mm (3.2 in)
1888	50.1 mm (2.0 in)
1889	123.9 mm (4.9 in)
1890	64.8 mm (2.6 in)
1891	59.1 mm (2.3 in)
1892	96.5 mm (3.8 in)
1893	67.1 mm (2.6 in)
1894	108.0 mm (4.3 in)
1895	42.8 mm (1.7 in)
1896	86.1 mm (3.4 in)
1897	79.5 mm (3.1 in)
1898	45.4 mm (1.8 in)
1899	39.4 mm (1.6 in)
1900	51.6 mm (2.0 in)
1901	47.5 mm (1.9 in)
1902	87.4 mm (3.4 in)
1903	58.1 mm (2.3 in)
1904	79.2 mm (3.1 in)
1905	64.8 mm (2.6 in)
1906	49.3 mm (1.9 in)
1907	56.4 mm (2.2 in)
1908	15.2 mm (0.6 in)
1909	40.9 mm (1.6 in)
1926	38.1 mm (1.5 in)
1927	101.3 mm (4.0 in)
1948	47.5 mm (1.9 in)
1949	66.1 mm (2.6 in)
1950	155.7 mm (6.1 in)
1951	63.7 mm (2.5 in)
1952	70.2 mm (2.8 in)
1953	89.9 mm (3.5 in)
1954	89.4 mm (3.5 in)
1955	54.6 mm (2.1 in)
1956	77.2 mm (3.0 in)
1957	82.9 mm (3.3 in)
1958	63.1 mm (2.5 in)
1959	81.2 mm (3.2 in)
1960	61.0 mm (2.4 in)
1961	11.9 mm (0.5 in)

Longest dry spell (CDD)

The longest dry spell of the year at Sarnia, 1882 to 1961. The record is 53 days in 1899, marked on the chart; the median year is 21 days.

Longest dry spell (CDD) at Sarnia by year
Year	Longest dry spell (CDD)
1882	21 days
1883	13 days
1884	21 days
1885	17 days
1886	18 days
1887	24 days
1888	22 days
1889	27 days
1890	26 days
1891	30 days
1892	18 days
1893	19 days
1894	32 days
1895	25 days
1896	21 days
1897	27 days
1898	22 days
1899	53 days
1900	23 days
1901	34 days
1902	26 days
1903	41 days
1904	22 days
1905	28 days
1906	27 days
1907	30 days
1908	8 days
1909	23 days
1926	12 days
1927	17 days
1948	14 days
1949	19 days
1950	16 days
1951	11 days
1952	21 days
1953	14 days
1954	13 days
1955	16 days
1956	19 days
1957	23 days
1958	30 days
1959	16 days
1960	12 days
1961	10 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.

Rainfall Return Levels

37 years, 1883 to 1960

A day with at least 44.9 mm (1.8 in) of rain is expected about once in 2 years. A day with at least 103.3 mm (4.1 in) of rain is expected about once in 100 years.

Rainfall return levels at Sarnia: the daily rain expected about once in a given number of years
Expected about once in	A day with at least	Note
2 years	44.9 mm (1.8 in)
5 years	58.5 mm (2.3 in)
10 years	68.3 mm (2.7 in)
25 years	81.6 mm (3.2 in)
50 years	92.2 mm (3.6 in)	Longer than the 37 years of record
100 years	103.3 mm (4.1 in)	Longer than the 37 years of record

The levels come from a generalised extreme value (GEV) distribution fitted by L-moments to the wettest-day total of each year, 37 years of values from 1883 to 1960.

A return level is an estimate. It is least reliable for the long periods, 50 and 100 years, and for any period longer than the record behind the fit, where the fit has to reach past the largest day actually observed. It is not a forecast.

The largest wettest-day totals in the fit: 97.8 mm (3.9 in) in 1889; 85.1 mm (3.4 in) in 1950; 82.6 mm (3.3 in) in 1894.

Download the Data

Data for Sarnia standing records by year: CSV or JSON. Field meanings are on the data page.
Data for Sarnia 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 2026-10-13. Last revised 13 October 2026 (2026-10-13).