Chatsworth Weather Records (CA006111467)

Record envelope, standing records and threshold days for Chatsworth (CA006111467), Ontario, Canada, with 62 years of record.

Key Facts for Chatsworth

Chatsworth (CA006111467) is a weather station in Ontario, Canada at 44.40 latitude and -80.90 longitude, 305 m (1,001 ft) above sea level.
The station reports from 1952 to 2013, 62 years of record.
1,464 records set at Chatsworth 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, 44.40 latitude, -80.90 longitude.
Elevation: 305 m (1,001 ft).
Period of record: 1952 to 2013, 62 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 Chatsworth. 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 Chatsworth, with 2026 drawn through them
Month	Highest record high	Lowest record low	2026 highest maximum	2026 lowest minimum
Jan	11.1 C (52.0 F)	-35.6 C (-32.1 F)	n/a	n/a
Feb	11.7 C (53.1 F)	-35.0 C (-31.0 F)	n/a	n/a
Mar	20.0 C (68.0 F)	-32.0 C (-25.6 F)	n/a	n/a
Apr	27.8 C (82.0 F)	-20.0 C (-4.0 F)	n/a	n/a
May	32.2 C (90.0 F)	-7.8 C (18.0 F)	n/a	n/a
Jun	36.7 C (98.1 F)	-2.8 C (27.0 F)	n/a	n/a
Jul	38.3 C (100.9 F)	1.7 C (35.1 F)	n/a	n/a
Aug	35.6 C (96.1 F)	-0.6 C (30.9 F)	n/a	n/a
Sep	36.1 C (97.0 F)	-2.8 C (27.0 F)	n/a	n/a
Oct	28.9 C (84.0 F)	-8.3 C (17.1 F)	n/a	n/a
Nov	21.0 C (69.8 F)	-20.6 C (-5.1 F)	n/a	n/a
Dec	18.0 C (64.4 F)	-30.0 C (-22.0 F)	n/a	n/a

Which Years Hold Standing Records

1,464 standing records

1,464 records at Chatsworth still stand. 1973 holds the most, with 86.

Standing records at Chatsworth by the year they were set
Year set	Standing records
1958	40
1959	54
1961	7
1962	77
1963	50
1964	79
1965	75
1966	61
1967	71
1968	69
1969	46
1970	54
1971	50
1972	49
1973	86
1974	56
1975	64
1976	69
1977	69
1978	41
1979	80
1980	43
1981	61
1982	57
1983	56

Wettest Day of Each Month

Aug: 88.9 mm (3.5 in)

The wettest day on record for each calendar month at Chatsworth. The most was 88.9 mm (3.5 in) on 23 August 1954.

Record daily precipitation for each month at Chatsworth
Month	Record daily precipitation (mm)	Date
Jan	36.8 mm (1.4 in)	27 January 1954
Feb	38.1 mm (1.5 in)	10 February 1959
Mar	41.7 mm (1.6 in)	17 March 1973
Apr	54.1 mm (2.1 in)	23 April 1975
May	60.7 mm (2.4 in)	19 May 1959
Jun	64.0 mm (2.5 in)	15 June 1982
Jul	55.4 mm (2.2 in)	6 July 1953
Aug	88.9 mm (3.5 in)	23 August 1954
Sep	69.3 mm (2.7 in)	8 September 1970
Oct	69.1 mm (2.7 in)	15 October 1954
Nov	63.5 mm (2.5 in)	28 November 1965
Dec	39.1 mm (1.5 in)	6 December 1958

Period of Record Coverage

1958 to 1983

25 years of record at Chatsworth, 1958 to 1983. 4 years have data for under 90 percent of days and are left out of rankings: 1958, 1959, 1961, 1963.

Days with data per year at Chatsworth
Year	Days with data	Share of year	Complete
1958	214	59%	No
1959	208	57%	No
1961	54	15%	No
1962	363	99%	Yes
1963	261	72%	No
1964	364	99%	Yes
1965	361	99%	Yes
1966	362	99%	Yes
1967	361	99%	Yes
1968	366	100%	Yes
1969	365	100%	Yes
1970	364	100%	Yes
1971	365	100%	Yes
1972	366	100%	Yes
1973	365	100%	Yes
1974	365	100%	Yes
1975	365	100%	Yes
1976	366	100%	Yes
1977	365	100%	Yes
1978	365	100%	Yes
1979	365	100%	Yes
1980	366	100%	Yes
1981	365	100%	Yes
1982	363	99%	Yes
1983	364	100%	Yes

Latest Records

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

Climate Trend

21 complete years, 1962 to 1983

One stripe for each of 21 complete years at Chatsworth, 1962 to 1983. Blue stripes are years cooler than the station's own mean of 5.8 C (42.5 F); red stripes are warmer. The coolest year was 1962, at 4.2 C (39.6 F), and the warmest was 1973, at 7.5 C (45.4 F). The strongest colour marks a difference of 1.7 C (3.1 F).

Annual mean temperature at Chatsworth as warming stripes, 1962 to 1983
Year	Annual mean temperature	Difference from the station mean
1962	4.2 C	-1.57 C
1964	6.8 C	+0.99 C
1965	5.3 C	-0.53 C
1966	5.9 C	+0.11 C
1967	5.5 C	-0.35 C
1968	5.9 C	+0.11 C
1969	5.7 C	-0.07 C
1970	6.2 C	+0.37 C
1971	6.6 C	+0.76 C
1972	5.3 C	-0.47 C
1973	7.5 C	+1.65 C
1974	6.1 C	+0.29 C
1975	6.9 C	+1.06 C
1976	5.4 C	-0.42 C
1977	5.4 C	-0.38 C
1978	4.9 C	-0.89 C
1979	5.3 C	-0.47 C
1980	5.1 C	-0.71 C
1981	5.7 C	-0.13 C
1982	5.8 C	-0.05 C
1983	6.5 C	+0.71 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

1952 to 1983

Yearly extremes at Chatsworth: the record and the median year
Measure	Record	Year of the record	Median year	Years with a value
Hottest day (TXx)	38.3 C (100.9 F)	1959	31.5 C (88.7 F)	25
Coldest night (TNn)	-35.6 C (-32.1 F)	1977	-28.9 C (-20.0 F)	25
Wettest day (Rx1day)	88.9 mm (3.5 in)	1954	45.2 mm (1.8 in)	31
Wettest five days (Rx5day)	130.3 mm (5.1 in)	1981	83.3 mm (3.3 in)	31
Longest dry spell (CDD)	33 days	1966	16 days	31

Hottest day (TXx)

The hottest day of the year at Chatsworth, 1952 to 1983. The record is 38.3 C (100.9 F) in 1959, marked on the chart; the median year is 31.5 C (88.7 F).

Hottest day (TXx) at Chatsworth by year
Year	Hottest day (TXx)
1952	n/a
1953	n/a
1954	n/a
1955	n/a
1956	n/a
1957	n/a
1958	29.4 C (84.9 F)
1959	38.3 C (100.9 F)
1961	11.7 C (53.1 F)
1962	29.4 C (84.9 F)
1963	29.4 C (84.9 F)
1964	33.3 C (91.9 F)
1965	32.8 C (91.0 F)
1966	33.3 C (91.9 F)
1967	30.0 C (86.0 F)
1968	32.2 C (90.0 F)
1969	31.7 C (89.1 F)
1970	31.1 C (88.0 F)
1971	33.9 C (93.0 F)
1972	31.1 C (88.0 F)
1973	36.1 C (97.0 F)
1974	32.2 C (90.0 F)
1975	34.4 C (93.9 F)
1976	30.0 C (86.0 F)
1977	32.2 C (90.0 F)
1978	31.0 C (87.8 F)
1979	31.5 C (88.7 F)
1980	29.5 C (85.1 F)
1981	30.5 C (86.9 F)
1982	31.0 C (87.8 F)
1983	32.0 C (89.6 F)

Coldest night (TNn)

The coldest night of the year at Chatsworth, 1952 to 1983. The record is -35.6 C (-32.1 F) in 1977, marked on the chart; the median year is -28.9 C (-20.0 F).

Coldest night (TNn) at Chatsworth by year
Year	Coldest night (TNn)
1952	n/a
1953	n/a
1954	n/a
1955	n/a
1956	n/a
1957	n/a
1958	-25.6 C (-14.1 F)
1959	-28.9 C (-20.0 F)
1961	-22.2 C (-8.0 F)
1962	-34.4 C (-29.9 F)
1963	-34.4 C (-29.9 F)
1964	-25.0 C (-13.0 F)
1965	-30.6 C (-23.1 F)
1966	-28.9 C (-20.0 F)
1967	-30.6 C (-23.1 F)
1968	-28.9 C (-20.0 F)
1969	-25.6 C (-14.1 F)
1970	-27.8 C (-18.0 F)
1971	-23.3 C (-9.9 F)
1972	-24.4 C (-11.9 F)
1973	-28.9 C (-20.0 F)
1974	-26.1 C (-15.0 F)
1975	-25.0 C (-13.0 F)
1976	-31.7 C (-25.1 F)
1977	-35.6 C (-32.1 F)
1978	-33.0 C (-27.4 F)
1979	-35.0 C (-31.0 F)
1980	-32.0 C (-25.6 F)
1981	-32.5 C (-26.5 F)
1982	-28.0 C (-18.4 F)
1983	-28.5 C (-19.3 F)

Wettest day (Rx1day)

The wettest day of the year at Chatsworth, 1952 to 1983. The record is 88.9 mm (3.5 in) in 1954, marked on the chart; the median year is 45.2 mm (1.8 in).

Wettest day (Rx1day) at Chatsworth by year
Year	Wettest day (Rx1day)
1952	3.3 mm (0.13 in)
1953	55.4 mm (2.2 in)
1954	88.9 mm (3.5 in)
1955	47.5 mm (1.9 in)
1956	50.0 mm (2.0 in)
1957	45.2 mm (1.8 in)
1958	39.1 mm (1.5 in)
1959	60.7 mm (2.4 in)
1961	37.3 mm (1.5 in)
1962	39.1 mm (1.5 in)
1963	33.8 mm (1.3 in)
1964	38.4 mm (1.5 in)
1965	63.5 mm (2.5 in)
1966	32.3 mm (1.3 in)
1967	48.5 mm (1.9 in)
1968	35.8 mm (1.4 in)
1969	32.8 mm (1.3 in)
1970	69.3 mm (2.7 in)
1971	37.3 mm (1.5 in)
1972	38.6 mm (1.5 in)
1973	41.7 mm (1.6 in)
1974	57.4 mm (2.3 in)
1975	54.1 mm (2.1 in)
1976	34.3 mm (1.4 in)
1977	49.8 mm (2.0 in)
1978	33.0 mm (1.3 in)
1979	64.2 mm (2.5 in)
1980	55.6 mm (2.2 in)
1981	48.5 mm (1.9 in)
1982	64.0 mm (2.5 in)
1983	37.6 mm (1.5 in)

Wettest five days (Rx5day)

The wettest five days of the year at Chatsworth, 1952 to 1983. The record is 130.3 mm (5.1 in) in 1981, marked on the chart; the median year is 83.3 mm (3.3 in).

Wettest five days (Rx5day) at Chatsworth by year
Year	Wettest five days (Rx5day)
1952	3.6 mm (0.14 in)
1953	98.6 mm (3.9 in)
1954	124.5 mm (4.9 in)
1955	63.0 mm (2.5 in)
1956	84.7 mm (3.3 in)
1957	86.1 mm (3.4 in)
1958	91.7 mm (3.6 in)
1959	86.6 mm (3.4 in)
1961	62.2 mm (2.4 in)
1962	65.0 mm (2.6 in)
1963	94.0 mm (3.7 in)
1964	43.0 mm (1.7 in)
1965	98.9 mm (3.9 in)
1966	62.0 mm (2.4 in)
1967	80.6 mm (3.2 in)
1968	85.3 mm (3.4 in)
1969	88.0 mm (3.5 in)
1970	70.6 mm (2.8 in)
1971	83.3 mm (3.3 in)
1972	75.9 mm (3.0 in)
1973	57.1 mm (2.2 in)
1974	78.5 mm (3.1 in)
1975	68.5 mm (2.7 in)
1976	71.0 mm (2.8 in)
1977	93.8 mm (3.7 in)
1978	77.1 mm (3.0 in)
1979	93.4 mm (3.7 in)
1980	62.0 mm (2.4 in)
1981	130.3 mm (5.1 in)
1982	96.4 mm (3.8 in)
1983	88.4 mm (3.5 in)

Longest dry spell (CDD)

The longest dry spell of the year at Chatsworth, 1952 to 1983. The record is 33 days in 1966, marked on the chart; the median year is 16 days.

Longest dry spell (CDD) at Chatsworth by year
Year	Longest dry spell (CDD)
1952	2 days
1953	15 days
1954	15 days
1955	19 days
1956	12 days
1957	20 days
1958	24 days
1959	20 days
1961	9 days
1962	20 days
1963	21 days
1964	11 days
1965	14 days
1966	33 days
1967	20 days
1968	16 days
1969	19 days
1970	14 days
1971	17 days
1972	13 days
1973	17 days
1974	12 days
1975	18 days
1976	13 days
1977	16 days
1978	16 days
1979	10 days
1980	10 days
1981	22 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

21 years with a frost

Across 21 years with a frost, the median last spring frost at Chatsworth falls on 31 May and the median first autumn frost on 24 September, which leaves a median of 118 days between them.

Frost dates and growing season at Chatsworth
Measure	Median, all years	Earliest period	Recent period (1962 to 1983)	Recent against earliest	Fitted trend
Last spring frost	31 May	n/a	31 May	n/a	n/a
First autumn frost	24 September	n/a	24 September	n/a	n/a
Growing days	118 days	n/a	118 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 Chatsworth standing records by year: CSV or JSON. Field meanings are on the data page.
Data for Chatsworth 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).