Niagara Falls Ont Hydro Weather Records (CA006135660)

Record envelope, standing records and threshold days for Niagara Falls Ont Hydro (CA006135660), Ontario, Canada, with 52 years of record.

Key Facts for Niagara Falls Ont Hydro

Niagara Falls Ont Hydro (CA006135660) is a weather station in Ontario, Canada at 43.08 latitude and -79.08 longitude, 198 m (650 ft) above sea level.
The station reports from 1921 to 1972, 52 years of record.
1,464 records set at Niagara Falls Ont Hydro still stand.
Records are tracked for tmin, prcp, snow: an element needs 30 years of data to be eligible.
Niagara Falls Ont Hydro set a daily record high minimum temperature of -1.1 C (30.0 F) on 29 February 1972.

About the Station

Location: Ontario, Canada, 43.08 latitude, -79.08 longitude.
Elevation: 198 m (650 ft).
Period of record: 1921 to 1972, 52 years.
Eligible elements: tmin, 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 Niagara Falls Ont Hydro. 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 Niagara Falls Ont Hydro, with 2026 drawn through them
Month	Highest record high	Lowest record low	2026 highest maximum	2026 lowest minimum
Jan	19.4 C (66.9 F)	-26.1 C (-15.0 F)	n/a	n/a
Feb	16.7 C (62.1 F)	-26.7 C (-16.1 F)	n/a	n/a
Mar	26.1 C (79.0 F)	-20.6 C (-5.1 F)	n/a	n/a
Apr	28.9 C (84.0 F)	-12.8 C (9.0 F)	n/a	n/a
May	33.3 C (91.9 F)	-3.3 C (26.1 F)	n/a	n/a
Jun	34.4 C (93.9 F)	1.7 C (35.1 F)	n/a	n/a
Jul	36.1 C (97.0 F)	3.9 C (39.0 F)	n/a	n/a
Aug	35.6 C (96.1 F)	2.8 C (37.0 F)	n/a	n/a
Sep	34.4 C (93.9 F)	-1.1 C (30.0 F)	n/a	n/a
Oct	29.4 C (84.9 F)	-7.8 C (18.0 F)	n/a	n/a
Nov	26.1 C (79.0 F)	-15.6 C (3.9 F)	n/a	n/a
Dec	18.3 C (64.9 F)	-21.1 C (-6.0 F)	n/a	n/a

Which Years Hold Standing Records

1,464 standing records

1,464 records at Niagara Falls Ont Hydro still stand. 1945 holds the most, with 92.

Standing records at Niagara Falls Ont Hydro by the year they were set
Year set	Standing records
1929	2
1942	26
1943	54
1944	69
1945	92
1946	65
1947	59
1948	47
1949	66
1950	52
1951	51
1952	43
1953	52
1954	44
1955	62
1956	24
1957	27
1958	58
1959	58
1960	49
1961	36
1962	46
1963	49
1964	53
1965	67
1966	43
1967	51
1968	26
1969	27
1970	34
1971	27
1972	5

All-Time Record Progression

2 new records

2 all-time records were set at Niagara Falls Ont Hydro between 24 August 1954 and 18 February 1958. Each dot is a new record.

When Niagara Falls Ont Hydro set new all-time records
Date	Kind	Detail
1954-08-24	Record daily precipitation	Record daily precipitation 95.3 mm (3.8 in)
1958-02-18	Record daily snowfall	Record daily snowfall 45.7 cm (18.0 in)

Wettest Day of Each Month

Aug: 95.3 mm (3.8 in)

The wettest day on record for each calendar month at Niagara Falls Ont Hydro. The most was 95.3 mm (3.8 in) on 24 August 1954.

Record daily precipitation for each month at Niagara Falls Ont Hydro
Month	Record daily precipitation (mm)	Date
Jan	43.2 mm (1.7 in)	22 January 1966
Feb	60.5 mm (2.4 in)	16 February 1954
Mar	43.2 mm (1.7 in)	17 March 1936
Apr	43.2 mm (1.7 in)	5 April 1929
May	49.0 mm (1.9 in)	15 May 1942
Jun	81.3 mm (3.2 in)	25 June 1968
Jul	85.9 mm (3.4 in)	12 July 1964
Aug	95.3 mm (3.8 in)	24 August 1954
Sep	76.5 mm (3.0 in)	18 September 1945
Oct	79.0 mm (3.1 in)	1 October 1945
Nov	42.7 mm (1.7 in)	28 November 1968
Dec	39.1 mm (1.5 in)	20 December 1949

Period of Record Coverage

1929 to 1972

31 years of record at Niagara Falls Ont Hydro, 1929 to 1972. 10 years have data for under 90 percent of days and are left out of rankings: 1929, 1942, 1955, 1956, 1958, 1967, 1968, 1970 and others.

Days with data per year at Niagara Falls Ont Hydro
Year	Days with data	Share of year	Complete
1929	1	0%	No
1942	184	50%	No
1943	365	100%	Yes
1944	366	100%	Yes
1945	365	100%	Yes
1946	364	100%	Yes
1947	365	100%	Yes
1948	365	100%	Yes
1949	364	100%	Yes
1950	365	100%	Yes
1951	365	100%	Yes
1952	366	100%	Yes
1953	365	100%	Yes
1954	337	92%	Yes
1955	314	86%	No
1956	152	42%	No
1958	326	89%	No
1959	361	99%	Yes
1960	363	99%	Yes
1961	359	98%	Yes
1962	339	93%	Yes
1963	345	95%	Yes
1964	347	95%	Yes
1965	349	96%	Yes
1966	355	97%	Yes
1967	269	74%	No
1968	275	75%	No
1969	335	92%	Yes
1970	323	88%	No
1971	302	83%	No
1972	60	16%	No

Latest Records

Latest records at Niagara Falls Ont Hydro
Date	Station	Record	Value	Beat old record by	Old record stood	Significance
29 February 1972	Niagara Falls Ont Hydro, CA	daily high min	-1.1 C (30.0 F)	5.6 C (10.1 F)	28 years	21 of 100 (Routine)
13 February 1972	Niagara Falls Ont Hydro, CA	daily rain	30.2 mm (1.2 in)	4.8 mm (0.19 in)	21 years	18 of 100 (Routine)
3 February 1972	Niagara Falls Ont Hydro, CA	daily high min	-0.6 C (30.9 F)	0.5 C (0.9 F)	20 years	10 of 100 (Routine)
23 January 1972	Niagara Falls Ont Hydro, CA	daily snowfall	12.7 cm (5.0 in)	2.5 cm (1.0 in)	6 years	12 of 100 (Routine)
16 January 1972	Niagara Falls Ont Hydro, CA	daily low min (Tie)	-21.1 C (-6.0 F)	tie	8 years	1 of 100 (Routine)
11 January 1972	Niagara Falls Ont Hydro, CA	daily high min (Tie)	-0.6 C (30.9 F)	tie	16 years	2 of 100 (Routine)
24 November 1971	Niagara Falls Ont Hydro, CA	daily snowfall	5.3 cm (2.1 in)	0.2 cm (0.1 in)	20 years	11 of 100 (Routine)
21 November 1971	Niagara Falls Ont Hydro, CA	daily snowfall	4.1 cm (1.6 in)	1.1 cm (0.4 in)	20 years	13 of 100 (Routine)
26 August 1971	Niagara Falls Ont Hydro, CA	daily rain	26.7 mm (1.1 in)	0.5 mm (0.02 in)	5 years	6 of 100 (Routine)
12 June 1971	Niagara Falls Ont Hydro, CA	daily rain	19.6 mm (0.8 in)	6.1 mm (0.24 in)	28 years	19 of 100 (Routine)
24 May 1971	Niagara Falls Ont Hydro, CA	daily rain	20.8 mm (0.8 in)	9.1 mm (0.36 in)	6 years	18 of 100 (Routine)
16 May 1971	Niagara Falls Ont Hydro, CA	daily rain	22.9 mm (0.9 in)	2.8 mm (0.11 in)	25 years	15 of 100 (Routine)
19 March 1971	Niagara Falls Ont Hydro, CA	daily snowfall	12.7 cm (5.0 in)	8.9 cm (3.5 in)	26 years	28 of 100 (Routine)
19 March 1971	Niagara Falls Ont Hydro, CA	daily rain	13.2 mm (0.5 in)	0.5 mm (0.02 in)	1 year	5 of 100 (Routine)
15 March 1971	Niagara Falls Ont Hydro, CA	daily rain	13.0 mm (0.5 in)	0.8 mm (0.03 in)	26 years	14 of 100 (Routine)
22 February 1971	Niagara Falls Ont Hydro, CA	daily rain	20.6 mm (0.8 in)	2.8 mm (0.11 in)	9 years	11 of 100 (Routine)
8 February 1971	Niagara Falls Ont Hydro, CA	daily snowfall	25.4 cm (10.0 in)	7.6 cm (3.0 in)	28 years	27 of 100 (Routine)
8 February 1971	Niagara Falls Ont Hydro, CA	daily rain	25.4 mm (1.0 in)	7.6 mm (0.30 in)	28 years	24 of 100 (Routine)
26 December 1970	Niagara Falls Ont Hydro, CA	daily snowfall	20.3 cm (8.0 in)	5.1 cm (2.0 in)	36 years	27 of 100 (Routine)
26 December 1970	Niagara Falls Ont Hydro, CA	daily rain	20.3 mm (0.8 in)	5.1 mm (0.20 in)	36 years	20 of 100 (Routine)

Climate Trend

18 complete years, 1943 to 1966

One stripe for each of 18 complete years at Niagara Falls Ont Hydro, 1943 to 1966. Blue stripes are years cooler than the station's own mean of 8.6 C (47.4 F); red stripes are warmer. The coolest year was 1943, at 7.7 C (45.8 F), and the warmest was 1953, at 9.8 C (49.6 F). The strongest colour marks a difference of 1.2 C (2.2 F).

Annual mean temperature at Niagara Falls Ont Hydro as warming stripes, 1943 to 1966
Year	Annual mean temperature	Difference from the station mean
1943	7.7 C	-0.89 C
1944	9.0 C	+0.44 C
1945	7.9 C	-0.67 C
1946	9.2 C	+0.65 C
1947	8.4 C	-0.13 C
1948	8.9 C	+0.30 C
1949	9.7 C	+1.18 C
1950	7.9 C	-0.69 C
1951	8.7 C	+0.14 C
1952	9.4 C	+0.86 C
1953	9.8 C	+1.19 C
1959	8.8 C	+0.19 C
1960	8.1 C	-0.46 C
1961	8.4 C	-0.17 C
1963	7.8 C	-0.80 C
1964	8.5 C	-0.04 C
1965	7.9 C	-0.62 C
1966	8.2 C	-0.40 C

This station does not have enough complete years (30 are needed) to fit a temperature trend.

A year is complete when all 12 months have at least 20 days of both daily maximum and daily minimum readings. The annual mean is the mean of the monthly means. The trend describes this one station over this period; it does not say what caused the change.

Extremes by Year

1921 to 1972

Yearly extremes at Niagara Falls Ont Hydro: the record and the median year
Measure	Record	Year of the record	Median year	Years with a value
Hottest day (TXx)	36.1 C (97.0 F)	1955	32.8 C (91.0 F)	31
Coldest night (TNn)	-26.7 C (-16.1 F)	1943	-20.8 C (-5.5 F)	32
Wettest day (Rx1day)	95.3 mm (3.8 in)	1954	43.2 mm (1.7 in)	51
Wettest five days (Rx5day)	124.5 mm (4.9 in)	1954	69.9 mm (2.8 in)	51
Longest dry spell (CDD)	42 days	1924	17 days	51

Hottest day (TXx)

The hottest day of the year at Niagara Falls Ont Hydro, 1921 to 1972. The record is 36.1 C (97.0 F) in 1955, marked on the chart; the median year is 32.8 C (91.0 F).

Hottest day (TXx) at Niagara Falls Ont Hydro by year
Year	Hottest day (TXx)
1921	n/a
1922	n/a
1923	n/a
1924	n/a
1926	n/a
1927	n/a
1928	n/a
1929	17.8 C (64.0 F)
1930	n/a
1931	n/a
1932	n/a
1933	n/a
1934	n/a
1935	n/a
1936	n/a
1937	n/a
1938	n/a
1939	n/a
1940	n/a
1941	n/a
1942	33.3 C (91.9 F)
1943	33.3 C (91.9 F)
1944	34.4 C (93.9 F)
1945	32.8 C (91.0 F)
1946	33.9 C (93.0 F)
1947	33.3 C (91.9 F)
1948	35.6 C (96.1 F)
1949	35.6 C (96.1 F)
1950	31.1 C (88.0 F)
1951	32.2 C (90.0 F)
1952	34.4 C (93.9 F)
1953	34.4 C (93.9 F)
1954	32.8 C (91.0 F)
1955	36.1 C (97.0 F)
1956	25.6 C (78.1 F)
1957	n/a
1958	29.4 C (84.9 F)
1959	33.9 C (93.0 F)
1960	31.1 C (88.0 F)
1961	31.1 C (88.0 F)
1962	32.8 C (91.0 F)
1963	33.3 C (91.9 F)
1964	32.8 C (91.0 F)
1965	31.1 C (88.0 F)
1966	34.4 C (93.9 F)
1967	31.1 C (88.0 F)
1968	32.8 C (91.0 F)
1969	32.8 C (91.0 F)
1970	30.6 C (87.1 F)
1971	32.2 C (90.0 F)
1972	12.2 C (54.0 F)

Coldest night (TNn)

The coldest night of the year at Niagara Falls Ont Hydro, 1921 to 1972. The record is -26.7 C (-16.1 F) in 1943, marked on the chart; the median year is -20.8 C (-5.5 F).

Coldest night (TNn) at Niagara Falls Ont Hydro by year
Year	Coldest night (TNn)
1921	n/a
1922	n/a
1923	n/a
1924	n/a
1926	n/a
1927	n/a
1928	n/a
1929	4.4 C (39.9 F)
1930	n/a
1931	n/a
1932	n/a
1933	n/a
1934	n/a
1935	n/a
1936	n/a
1937	n/a
1938	n/a
1939	n/a
1940	n/a
1941	n/a
1942	-21.1 C (-6.0 F)
1943	-26.7 C (-16.1 F)
1944	-23.9 C (-11.0 F)
1945	-26.1 C (-15.0 F)
1946	-17.8 C (0.0 F)
1947	-17.2 C (1.0 F)
1948	-21.1 C (-6.0 F)
1949	-16.1 C (3.0 F)
1950	-20.6 C (-5.1 F)
1951	-20.0 C (-4.0 F)
1952	-18.9 C (-2.0 F)
1953	-19.4 C (-2.9 F)
1954	-18.3 C (-0.9 F)
1955	-21.7 C (-7.1 F)
1956	-17.2 C (1.0 F)
1957	-22.2 C (-8.0 F)
1958	-20.6 C (-5.1 F)
1959	-22.8 C (-9.0 F)
1960	-18.9 C (-2.0 F)
1961	-21.7 C (-7.1 F)
1962	-20.6 C (-5.1 F)
1963	-22.8 C (-9.0 F)
1964	-17.8 C (0.0 F)
1965	-22.8 C (-9.0 F)
1966	-21.7 C (-7.1 F)
1967	-22.2 C (-8.0 F)
1968	-18.9 C (-2.0 F)
1969	-18.3 C (-0.9 F)
1970	-22.8 C (-9.0 F)
1971	-23.3 C (-9.9 F)
1972	-21.1 C (-6.0 F)

Wettest day (Rx1day)

The wettest day of the year at Niagara Falls Ont Hydro, 1921 to 1972. The record is 95.3 mm (3.8 in) in 1954, marked on the chart; the median year is 43.2 mm (1.7 in).

Wettest day (Rx1day) at Niagara Falls Ont Hydro by year
Year	Wettest day (Rx1day)
1921	24.4 mm (1.0 in)
1922	27.7 mm (1.1 in)
1923	29.2 mm (1.1 in)
1924	69.9 mm (2.8 in)
1926	72.6 mm (2.9 in)
1927	41.1 mm (1.6 in)
1928	70.6 mm (2.8 in)
1929	43.2 mm (1.7 in)
1930	26.4 mm (1.0 in)
1931	39.4 mm (1.6 in)
1932	55.4 mm (2.2 in)
1933	59.2 mm (2.3 in)
1934	35.6 mm (1.4 in)
1935	35.6 mm (1.4 in)
1936	43.2 mm (1.7 in)
1937	48.5 mm (1.9 in)
1938	80.0 mm (3.1 in)
1939	51.8 mm (2.0 in)
1940	39.9 mm (1.6 in)
1941	36.6 mm (1.4 in)
1942	69.9 mm (2.8 in)
1943	39.4 mm (1.6 in)
1944	33.0 mm (1.3 in)
1945	79.0 mm (3.1 in)
1946	36.8 mm (1.4 in)
1947	38.6 mm (1.5 in)
1948	38.1 mm (1.5 in)
1949	39.1 mm (1.5 in)
1950	38.9 mm (1.5 in)
1951	32.3 mm (1.3 in)
1952	64.8 mm (2.6 in)
1953	69.9 mm (2.8 in)
1954	95.3 mm (3.8 in)
1955	45.0 mm (1.8 in)
1956	41.4 mm (1.6 in)
1957	46.2 mm (1.8 in)
1958	45.7 mm (1.8 in)
1959	66.3 mm (2.6 in)
1960	45.7 mm (1.8 in)
1961	57.2 mm (2.3 in)
1962	39.4 mm (1.6 in)
1963	65.3 mm (2.6 in)
1964	85.9 mm (3.4 in)
1965	28.7 mm (1.1 in)
1966	43.2 mm (1.7 in)
1967	45.5 mm (1.8 in)
1968	81.3 mm (3.2 in)
1969	47.2 mm (1.9 in)
1970	34.3 mm (1.4 in)
1971	40.6 mm (1.6 in)
1972	30.2 mm (1.2 in)

Wettest five days (Rx5day)

The wettest five days of the year at Niagara Falls Ont Hydro, 1921 to 1972. The record is 124.5 mm (4.9 in) in 1954, marked on the chart; the median year is 69.9 mm (2.8 in).

Wettest five days (Rx5day) at Niagara Falls Ont Hydro by year
Year	Wettest five days (Rx5day)
1921	71.7 mm (2.8 in)
1922	45.3 mm (1.8 in)
1923	50.7 mm (2.0 in)
1924	101.1 mm (4.0 in)
1926	92.6 mm (3.6 in)
1927	86.6 mm (3.4 in)
1928	119.3 mm (4.7 in)
1929	66.8 mm (2.6 in)
1930	53.8 mm (2.1 in)
1931	55.4 mm (2.2 in)
1932	94.8 mm (3.7 in)
1933	64.3 mm (2.5 in)
1934	38.1 mm (1.5 in)
1935	49.5 mm (1.9 in)
1936	77.5 mm (3.1 in)
1937	80.8 mm (3.2 in)
1938	90.4 mm (3.6 in)
1939	57.6 mm (2.3 in)
1940	72.2 mm (2.8 in)
1941	40.9 mm (1.6 in)
1942	119.4 mm (4.7 in)
1943	63.3 mm (2.5 in)
1944	66.6 mm (2.6 in)
1945	103.2 mm (4.1 in)
1946	48.2 mm (1.9 in)
1947	66.0 mm (2.6 in)
1948	57.1 mm (2.2 in)
1949	50.6 mm (2.0 in)
1950	83.1 mm (3.3 in)
1951	57.9 mm (2.3 in)
1952	69.9 mm (2.8 in)
1953	75.2 mm (3.0 in)
1954	124.5 mm (4.9 in)
1955	75.5 mm (3.0 in)
1956	90.2 mm (3.6 in)
1957	68.3 mm (2.7 in)
1958	99.0 mm (3.9 in)
1959	100.9 mm (4.0 in)
1960	56.1 mm (2.2 in)
1961	98.3 mm (3.9 in)
1962	58.1 mm (2.3 in)
1963	79.5 mm (3.1 in)
1964	101.2 mm (4.0 in)
1965	53.9 mm (2.1 in)
1966	54.6 mm (2.1 in)
1967	82.8 mm (3.3 in)
1968	87.7 mm (3.5 in)
1969	83.3 mm (3.3 in)
1970	56.7 mm (2.2 in)
1971	59.7 mm (2.4 in)
1972	35.7 mm (1.4 in)

Longest dry spell (CDD)

The longest dry spell of the year at Niagara Falls Ont Hydro, 1921 to 1972. The record is 42 days in 1924, marked on the chart; the median year is 17 days.

Longest dry spell (CDD) at Niagara Falls Ont Hydro by year
Year	Longest dry spell (CDD)
1921	11 days
1922	17 days
1923	9 days
1924	42 days
1926	15 days
1927	16 days
1928	18 days
1929	16 days
1930	32 days
1931	15 days
1932	13 days
1933	33 days
1934	27 days
1935	18 days
1936	34 days
1937	16 days
1938	12 days
1939	20 days
1940	13 days
1941	21 days
1942	22 days
1943	20 days
1944	17 days
1945	18 days
1946	14 days
1947	24 days
1948	18 days
1949	18 days
1950	17 days
1951	15 days
1952	26 days
1953	16 days
1954	13 days
1955	34 days
1956	19 days
1957	23 days
1958	16 days
1959	15 days
1960	17 days
1961	12 days
1962	20 days
1963	27 days
1964	16 days
1965	11 days
1966	16 days
1967	14 days
1968	18 days
1969	22 days
1970	14 days
1971	20 days
1972	6 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

46 years, 1922 to 1971

A day with at least 45.2 mm (1.8 in) of rain is expected about once in 2 years. A day with at least 104.4 mm (4.1 in) of rain is expected about once in 100 years.

Rainfall return levels at Niagara Falls Ont Hydro: the daily rain expected about once in a given number of years
Expected about once in	A day with at least	Note
2 years	45.2 mm (1.8 in)
5 years	59.0 mm (2.3 in)
10 years	68.8 mm (2.7 in)
25 years	82.3 mm (3.2 in)
50 years	93.0 mm (3.7 in)	Longer than the 46 years of record
100 years	104.4 mm (4.1 in)	Longer than the 46 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, 46 years of values from 1922 to 1971.

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: 85.9 mm (3.4 in) in 1964; 80.0 mm (3.1 in) in 1938; 79.0 mm (3.1 in) in 1945.

Download the Data

Data for Niagara Falls Ont Hydro standing records by year: CSV or JSON. Field meanings are on the data page.
Data for Niagara Falls Ont Hydro 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).