Chats Falls Weather Records (CA006101440)

Record envelope, standing records and threshold days for Chats Falls (CA006101440), Ontario, Canada, with 43 years of record.

Key Facts for Chats Falls

Chats Falls (CA006101440) is a weather station in Ontario, Canada at 45.47 latitude and -76.23 longitude, 94 m (308 ft) above sea level.
The station reports from 1950 to 1992, 43 years of record.
1,464 records set at Chats Falls still stand.
Records are tracked for tmax, tmin, prcp, snow: an element needs 30 years of data to be eligible.
Chats Falls set a daily record low minimum temperature of -27.0 C (-16.6 F) on 30 December 1983.

About the Station

Location: Ontario, Canada, 45.47 latitude, -76.23 longitude.
Elevation: 94 m (308 ft).
Period of record: 1950 to 1992, 43 years.
Eligible elements: tmax, 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 Chats Falls. 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 Chats Falls, with 2026 drawn through them
Month	Highest record high	Lowest record low	2026 highest maximum	2026 lowest minimum
Jan	10.0 C (50.0 F)	-41.1 C (-42.0 F)	n/a	n/a
Feb	12.8 C (55.0 F)	-40.0 C (-40.0 F)	n/a	n/a
Mar	21.7 C (71.1 F)	-29.0 C (-20.2 F)	n/a	n/a
Apr	29.4 C (84.9 F)	-17.8 C (0.0 F)	n/a	n/a
May	35.0 C (95.0 F)	-6.7 C (19.9 F)	n/a	n/a
Jun	34.4 C (93.9 F)	-1.1 C (30.0 F)	n/a	n/a
Jul	37.2 C (99.0 F)	3.3 C (37.9 F)	n/a	n/a
Aug	37.8 C (100.0 F)	2.2 C (36.0 F)	n/a	n/a
Sep	35.6 C (96.1 F)	-5.0 C (23.0 F)	n/a	n/a
Oct	28.9 C (84.0 F)	-7.8 C (18.0 F)	n/a	n/a
Nov	21.1 C (70.0 F)	-22.8 C (-9.0 F)	n/a	n/a
Dec	14.4 C (57.9 F)	-38.9 C (-38.0 F)	n/a	n/a

Which Years Hold Standing Records

1,464 standing records

1,464 records at Chats Falls still stand. 1956 holds the most, with 86.

Standing records at Chats Falls by the year they were set
Year set	Standing records
1950	46
1951	81
1952	19
1953	31
1954	47
1955	70
1956	86
1957	62
1958	54
1959	72
1960	24
1961	32
1962	29
1963	47
1964	50
1965	41
1966	39
1967	29
1968	49
1969	16
1970	39
1971	33
1972	25
1973	42
1974	24
1975	48
1976	48
1977	39
1978	34
1979	53
1980	32
1981	44
1982	42
1983	37

Wettest Day of Each Month

Oct: 79.0 mm (3.1 in)

The wettest day on record for each calendar month at Chats Falls. The most was 79.0 mm (3.1 in) on 15 October 1955.

Record daily precipitation for each month at Chats Falls
Month	Record daily precipitation (mm)	Date
Jan	50.8 mm (2.0 in)	28 January 1970
Feb	38.1 mm (1.5 in)	3 February 1972
Mar	47.5 mm (1.9 in)	21 March 1980
Apr	38.6 mm (1.5 in)	20 April 1982
May	38.6 mm (1.5 in)	12 May 1974
Jun	53.8 mm (2.1 in)	28 June 1957
Jul	53.6 mm (2.1 in)	2 July 1964
Aug	52.8 mm (2.1 in)	1 August 1973
Sep	72.4 mm (2.9 in)	20 September 1957
Oct	79.0 mm (3.1 in)	15 October 1955
Nov	37.3 mm (1.5 in)	20 November 1974
Dec	36.8 mm (1.4 in)	20 December 1973

Period of Record Coverage

1950 to 1983

34 years of record at Chats Falls, 1950 to 1983. 5 years have data for under 90 percent of days and are left out of rankings: 1950, 1952, 1953, 1972, 1979.

Days with data per year at Chats Falls
Year	Days with data	Share of year	Complete
1950	189	52%	No
1951	365	100%	Yes
1952	153	42%	No
1953	160	44%	No
1954	360	99%	Yes
1955	365	100%	Yes
1956	366	100%	Yes
1957	365	100%	Yes
1958	365	100%	Yes
1959	365	100%	Yes
1960	366	100%	Yes
1961	365	100%	Yes
1962	334	92%	Yes
1963	365	100%	Yes
1964	365	100%	Yes
1965	335	92%	Yes
1966	356	98%	Yes
1967	358	98%	Yes
1968	366	100%	Yes
1969	333	91%	Yes
1970	356	98%	Yes
1971	365	100%	Yes
1972	244	67%	No
1973	335	92%	Yes
1974	334	92%	Yes
1975	365	100%	Yes
1976	366	100%	Yes
1977	365	100%	Yes
1978	365	100%	Yes
1979	301	82%	No
1980	362	99%	Yes
1981	364	100%	Yes
1982	362	99%	Yes
1983	364	100%	Yes

Latest Records

Latest records at Chats Falls
Date	Station	Record	Value	Beat old record by	Old record stood	Significance
30 December 1983	Chats Falls, CA	daily low min	-27.0 C (-16.6 F)	0.3 C (0.5 F)	26 years	11 of 100 (Routine)
28 December 1983	Chats Falls, CA	daily rain	18.0 mm (0.7 in)	2.8 mm (0.11 in)	14 years	12 of 100 (Routine)
28 December 1983	Chats Falls, CA	daily snowfall	18.0 cm (7.1 in)	2.8 cm (1.1 in)	14 years	12 of 100 (Routine)
15 December 1983	Chats Falls, CA	daily high min	0.0 C (32.0 F)	1.0 C (1.8 F)	0 years	4 of 100 (Routine)
4 December 1983	Chats Falls, CA	daily snowfall	8.0 cm (3.1 in)	0.4 cm (0.2 in)	28 years	11 of 100 (Routine)
30 November 1983	Chats Falls, CA	daily high min (Tie)	0.0 C (32.0 F)	tie	16 years	2 of 100 (Routine)
16 November 1983	Chats Falls, CA	daily rain	18.5 mm (0.7 in)	1.0 mm (0.04 in)	17 years	9 of 100 (Routine)
14 November 1983	Chats Falls, CA	daily low min (Tie)	-10.0 C (14.0 F)	tie	12 years	1 of 100 (Routine)
11 November 1983	Chats Falls, CA	daily snowfall	3.0 cm (1.2 in)	1.7 cm (0.7 in)	12 years	9 of 100 (Routine)
13 October 1983	Chats Falls, CA	daily high min	14.0 C (57.2 F)	1.2 C (2.2 F)	9 years	7 of 100 (Routine)
12 October 1983	Chats Falls, CA	daily rain	10.0 mm (0.4 in)	2.7 mm (0.11 in)	4 years	7 of 100 (Routine)
4 October 1983	Chats Falls, CA	daily rain	13.5 mm (0.5 in)	4.3 mm (0.17 in)	2 years	8 of 100 (Routine)
3 October 1983	Chats Falls, CA	monthly high min	16.0 C (60.8 F)	0.4 C (0.7 F)	28 years	21 of 100 (Routine)
2 October 1983	Chats Falls, CA	daily high min (Tie)	15.0 C (59.0 F)	tie	12 years	1 of 100 (Routine)
20 September 1983	Chats Falls, CA	daily high max	29.0 C (84.2 F)	1.2 C (2.2 F)	17 years	10 of 100 (Routine)
19 September 1983	Chats Falls, CA	daily high min (Tie)	15.0 C (59.0 F)	tie	28 years	2 of 100 (Routine)
10 September 1983	Chats Falls, CA	daily high min	20.0 C (68.0 F)	1.7 C (3.1 F)	21 years	12 of 100 (Routine)
7 September 1983	Chats Falls, CA	daily high min	18.0 C (64.4 F)	1.3 C (2.3 F)	22 years	11 of 100 (Routine)
6 September 1983	Chats Falls, CA	daily high min	21.0 C (69.8 F)	2.0 C (3.6 F)	4 years	8 of 100 (Routine)
30 July 1983	Chats Falls, CA	daily high min	21.0 C (69.8 F)	0.4 C (0.7 F)	12 years	7 of 100 (Routine)

Climate Trend

20 complete years, 1951 to 1983

One stripe for each of 20 complete years at Chats Falls, 1951 to 1983. Blue stripes are years cooler than the station's own mean of 5.8 C (42.4 F); red stripes are warmer. The coolest year was 1951, at 4.7 C (40.5 F), and the warmest was 1983, at 6.6 C (43.9 F). The strongest colour marks a difference of 1.1 C (2.0 F).

Annual mean temperature at Chats Falls as warming stripes, 1951 to 1983
Year	Annual mean temperature	Difference from the station mean
1951	4.7 C	-1.03 C
1954	5.6 C	-0.17 C
1955	6.0 C	+0.18 C
1956	4.8 C	-1.01 C
1957	6.3 C	+0.49 C
1958	5.1 C	-0.67 C
1961	6.4 C	+0.61 C
1964	6.2 C	+0.44 C
1966	6.2 C	+0.44 C
1968	5.7 C	-0.04 C
1970	5.3 C	-0.48 C
1971	5.6 C	-0.21 C
1975	6.5 C	+0.74 C
1976	4.9 C	-0.88 C
1977	6.3 C	+0.50 C
1978	5.3 C	-0.50 C
1980	5.7 C	-0.04 C
1981	6.6 C	+0.84 C
1982	5.7 C	-0.06 C
1983	6.6 C	+0.84 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

1950 to 1983

Yearly extremes at Chats Falls: the record and the median year
Measure	Record	Year of the record	Median year	Years with a value
Hottest day (TXx)	37.8 C (100.0 F)	1975	32.8 C (91.0 F)	34
Coldest night (TNn)	-41.1 C (-42.0 F)	1957	-33.3 C (-27.9 F)	34
Wettest day (Rx1day)	79.0 mm (3.1 in)	1955	38.1 mm (1.5 in)	34
Wettest five days (Rx5day)	131.1 mm (5.2 in)	1957	58.1 mm (2.3 in)	34
Longest dry spell (CDD)	23 days	1978	15 days	34

Hottest day (TXx)

The hottest day of the year at Chats Falls, 1950 to 1983. The record is 37.8 C (100.0 F) in 1975, marked on the chart; the median year is 32.8 C (91.0 F).

Hottest day (TXx) at Chats Falls by year
Year	Hottest day (TXx)
1950	32.2 C (90.0 F)
1951	31.7 C (89.1 F)
1952	27.8 C (82.0 F)
1953	36.7 C (98.1 F)
1954	32.2 C (90.0 F)
1955	37.2 C (99.0 F)
1956	34.4 C (93.9 F)
1957	34.4 C (93.9 F)
1958	32.8 C (91.0 F)
1959	34.4 C (93.9 F)
1960	31.7 C (89.1 F)
1961	31.7 C (89.1 F)
1962	33.9 C (93.0 F)
1963	35.0 C (95.0 F)
1964	33.9 C (93.0 F)
1965	32.2 C (90.0 F)
1966	35.0 C (95.0 F)
1967	31.1 C (88.0 F)
1968	34.4 C (93.9 F)
1969	32.2 C (90.0 F)
1970	32.2 C (90.0 F)
1971	33.3 C (91.9 F)
1972	28.9 C (84.0 F)
1973	33.3 C (91.9 F)
1974	32.8 C (91.0 F)
1975	37.8 C (100.0 F)
1976	32.2 C (90.0 F)
1977	37.2 C (99.0 F)
1978	35.0 C (95.0 F)
1979	31.0 C (87.8 F)
1980	32.0 C (89.6 F)
1981	32.0 C (89.6 F)
1982	33.0 C (91.4 F)
1983	32.0 C (89.6 F)

Coldest night (TNn)

The coldest night of the year at Chats Falls, 1950 to 1983. The record is -41.1 C (-42.0 F) in 1957, marked on the chart; the median year is -33.3 C (-27.9 F).

Coldest night (TNn) at Chats Falls by year
Year	Coldest night (TNn)
1950	-35.0 C (-31.0 F)
1951	-40.0 C (-40.0 F)
1952	-30.0 C (-22.0 F)
1953	-30.6 C (-23.1 F)
1954	-36.1 C (-33.0 F)
1955	-35.6 C (-32.1 F)
1956	-30.0 C (-22.0 F)
1957	-41.1 C (-42.0 F)
1958	-32.2 C (-26.0 F)
1959	-37.8 C (-36.0 F)
1960	-31.7 C (-25.1 F)
1961	-31.1 C (-24.0 F)
1962	-37.2 C (-35.0 F)
1963	-36.7 C (-34.1 F)
1964	-31.1 C (-24.0 F)
1965	-33.3 C (-27.9 F)
1966	-33.3 C (-27.9 F)
1967	-31.1 C (-24.0 F)
1968	-33.9 C (-29.0 F)
1969	-26.1 C (-15.0 F)
1970	-36.7 C (-34.1 F)
1971	-37.2 C (-35.0 F)
1972	-37.2 C (-35.0 F)
1973	-33.9 C (-29.0 F)
1974	-32.8 C (-27.0 F)
1975	-31.7 C (-25.1 F)
1976	-38.3 C (-36.9 F)
1977	-35.6 C (-32.1 F)
1978	-30.0 C (-22.0 F)
1979	-32.0 C (-25.6 F)
1980	-31.5 C (-24.7 F)
1981	-36.0 C (-32.8 F)
1982	-33.0 C (-27.4 F)
1983	-28.0 C (-18.4 F)

Wettest day (Rx1day)

The wettest day of the year at Chats Falls, 1950 to 1983. The record is 79.0 mm (3.1 in) in 1955, marked on the chart; the median year is 38.1 mm (1.5 in).

Wettest day (Rx1day) at Chats Falls by year
Year	Wettest day (Rx1day)
1950	48.5 mm (1.9 in)
1951	33.0 mm (1.3 in)
1952	37.8 mm (1.5 in)
1953	39.1 mm (1.5 in)
1954	36.1 mm (1.4 in)
1955	79.0 mm (3.1 in)
1956	35.8 mm (1.4 in)
1957	72.4 mm (2.9 in)
1958	43.9 mm (1.7 in)
1959	55.6 mm (2.2 in)
1960	28.2 mm (1.1 in)
1961	22.4 mm (0.9 in)
1962	30.5 mm (1.2 in)
1963	35.8 mm (1.4 in)
1964	53.6 mm (2.1 in)
1965	32.8 mm (1.3 in)
1966	32.0 mm (1.3 in)
1967	48.3 mm (1.9 in)
1968	32.5 mm (1.3 in)
1969	37.6 mm (1.5 in)
1970	50.8 mm (2.0 in)
1971	44.5 mm (1.8 in)
1972	38.1 mm (1.5 in)
1973	52.8 mm (2.1 in)
1974	38.6 mm (1.5 in)
1975	32.0 mm (1.3 in)
1976	39.4 mm (1.6 in)
1977	46.0 mm (1.8 in)
1978	31.0 mm (1.2 in)
1979	38.0 mm (1.5 in)
1980	47.5 mm (1.9 in)
1981	33.0 mm (1.3 in)
1982	38.6 mm (1.5 in)
1983	22.0 mm (0.9 in)

Wettest five days (Rx5day)

The wettest five days of the year at Chats Falls, 1950 to 1983. The record is 131.1 mm (5.2 in) in 1957, marked on the chart; the median year is 58.1 mm (2.3 in).

Wettest five days (Rx5day) at Chats Falls by year
Year	Wettest five days (Rx5day)
1950	72.1 mm (2.8 in)
1951	43.2 mm (1.7 in)
1952	63.7 mm (2.5 in)
1953	47.2 mm (1.9 in)
1954	50.1 mm (2.0 in)
1955	99.8 mm (3.9 in)
1956	57.8 mm (2.3 in)
1957	131.1 mm (5.2 in)
1958	66.0 mm (2.6 in)
1959	57.6 mm (2.3 in)
1960	42.2 mm (1.7 in)
1961	39.2 mm (1.5 in)
1962	47.4 mm (1.9 in)
1963	65.6 mm (2.6 in)
1964	62.5 mm (2.5 in)
1965	60.8 mm (2.4 in)
1966	57.2 mm (2.3 in)
1967	74.2 mm (2.9 in)
1968	51.1 mm (2.0 in)
1969	55.9 mm (2.2 in)
1970	61.0 mm (2.4 in)
1971	60.7 mm (2.4 in)
1972	54.6 mm (2.1 in)
1973	71.6 mm (2.8 in)
1974	61.3 mm (2.4 in)
1975	54.9 mm (2.2 in)
1976	64.8 mm (2.6 in)
1977	58.4 mm (2.3 in)
1978	44.7 mm (1.8 in)
1979	56.5 mm (2.2 in)
1980	62.5 mm (2.5 in)
1981	67.8 mm (2.7 in)
1982	39.0 mm (1.5 in)
1983	45.4 mm (1.8 in)

Longest dry spell (CDD)

The longest dry spell of the year at Chats Falls, 1950 to 1983. The record is 23 days in 1978, marked on the chart; the median year is 15 days.

Longest dry spell (CDD) at Chats Falls by year
Year	Longest dry spell (CDD)
1950	20 days
1951	15 days
1952	19 days
1953	12 days
1954	16 days
1955	15 days
1956	20 days
1957	15 days
1958	20 days
1959	16 days
1960	18 days
1961	21 days
1962	12 days
1963	16 days
1964	15 days
1965	18 days
1966	11 days
1967	18 days
1968	13 days
1969	14 days
1970	18 days
1971	12 days
1972	13 days
1973	16 days
1974	13 days
1975	16 days
1976	11 days
1977	14 days
1978	23 days
1979	12 days
1980	15 days
1981	14 days
1982	14 days
1983	16 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.

Frost Dates and Growing Season

20 years with a frost

Across 20 years with a frost, the median last spring frost at Chats Falls falls on 9 May and the median first autumn frost on 1 October, which leaves a median of 152 days between them.

Frost dates and growing season at Chats Falls
Measure	Median, all years	Earliest period	Recent period (1951 to 1983)	Recent against earliest	Fitted trend
Last spring frost	9 May	n/a	9 May	n/a	n/a
First autumn frost	1 October	n/a	1 October	n/a	n/a
Growing days	152 days	n/a	152 days	n/a	n/a

A frost day is a day with a daily minimum at or below 0 C (32 F). The last spring frost and the first autumn frost are the last and first such days of the cold season, and growing days are the days between them. A negative trend for the last spring frost means it comes earlier.

Download the Data

Data for Chats Falls standing records by year: CSV or JSON. Field meanings are on the data page.
Data for Chats Falls 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). Records are computed by this site and are not official.

Data as of 2026-10-17. Last revised 17 October 2026 (2026-10-17).