Lachute Weather Records (CA007033650)

Record envelope, standing records and threshold days for Lachute (CA007033650), Quebec, Canada, with 62 years of record.

Key Facts for Lachute

Lachute (CA007033650) is a weather station in Quebec, Canada at 45.65 latitude and -74.33 longitude, 91 m (299 ft) above sea level.
The station reports from 1963 to 2024, 62 years of record.
1,464 records set at Lachute still stand.
Records are tracked for no element yet: an element needs 30 years of data to be eligible.

About the Station

Location: Quebec, Canada, 45.65 latitude, -74.33 longitude.
Elevation: 91 m (299 ft).
Period of record: 1963 to 2024, 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 Lachute. 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 Lachute, with 2026 drawn through them
Month	Highest record high	Lowest record low	2026 highest maximum	2026 lowest minimum
Jan	9.5 C (49.1 F)	-37.0 C (-34.6 F)	n/a	n/a
Feb	11.5 C (52.7 F)	-35.0 C (-31.0 F)	n/a	n/a
Mar	17.2 C (63.0 F)	-27.5 C (-17.5 F)	n/a	n/a
Apr	29.4 C (84.9 F)	-15.0 C (5.0 F)	n/a	n/a
May	32.2 C (90.0 F)	-6.7 C (19.9 F)	n/a	n/a
Jun	35.0 C (95.0 F)	0.0 C (32.0 F)	n/a	n/a
Jul	34.4 C (93.9 F)	3.5 C (38.3 F)	n/a	n/a
Aug	35.0 C (95.0 F)	0.6 C (33.1 F)	n/a	n/a
Sep	31.5 C (88.7 F)	-5.0 C (23.0 F)	n/a	n/a
Oct	27.2 C (81.0 F)	-8.9 C (16.0 F)	n/a	n/a
Nov	17.2 C (63.0 F)	-20.6 C (-5.1 F)	n/a	n/a
Dec	13.0 C (55.4 F)	-34.5 C (-30.1 F)	n/a	n/a

Which Years Hold Standing Records

1,464 standing records

1,464 records at Lachute still stand. 1981 holds the most, with 90.

Standing records at Lachute by the year they were set
Year set	Standing records
1963	74
1964	84
1965	82
1966	69
1967	72
1968	70
1969	55
1970	71
1971	70
1972	52
1973	71
1974	55
1975	53
1976	86
1977	61
1978	52
1979	89
1980	59
1981	90
1982	78
1983	71

Wettest Day of Each Month

Sep: 66.3 mm (2.6 in)

The wettest day on record for each calendar month at Lachute. The most was 66.3 mm (2.6 in) on 12 September 1963.

Record daily precipitation for each month at Lachute
Month	Record daily precipitation (mm)	Date
Jan	62.2 mm (2.4 in)	8 January 1978
Feb	51.1 mm (2.0 in)	2 February 1973
Mar	36.6 mm (1.4 in)	17 March 1973
Apr	38.1 mm (1.5 in)	2 April 1979
May	36.6 mm (1.4 in)	10 May 1981
Jun	62.2 mm (2.4 in)	11 June 1973
Jul	46.0 mm (1.8 in)	20 July 1970
Aug	56.0 mm (2.2 in)	25 August 1982
Sep	66.3 mm (2.6 in)	12 September 1963
Oct	37.8 mm (1.5 in)	25 October 1980
Nov	42.9 mm (1.7 in)	2 November 1967
Dec	48.8 mm (1.9 in)	16 December 1974

Period of Record Coverage

1963 to 1983

21 years of record at Lachute, 1963 to 1983. Every year has data for at least 90 percent of its days.

Days with data per year at Lachute
Year	Days with data	Share of year	Complete
1963	345	95%	Yes
1964	366	100%	Yes
1965	365	100%	Yes
1966	365	100%	Yes
1967	365	100%	Yes
1968	366	100%	Yes
1969	365	100%	Yes
1970	365	100%	Yes
1971	365	100%	Yes
1972	366	100%	Yes
1973	364	100%	Yes
1974	365	100%	Yes
1975	365	100%	Yes
1976	366	100%	Yes
1977	365	100%	Yes
1978	358	98%	Yes
1979	365	100%	Yes
1980	366	100%	Yes
1981	365	100%	Yes
1982	365	100%	Yes
1983	365	100%	Yes

Latest Records

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

Climate Trend

20 complete years, 1964 to 1983

One stripe for each of 20 complete years at Lachute, 1964 to 1983. Blue stripes are years cooler than the station's own mean of 5.0 C (41.0 F); red stripes are warmer. The coolest year was 1972, at 4.1 C (39.3 F), and the warmest was 1973, at 6.0 C (42.9 F). The strongest colour marks a difference of 1.1 C (2.0 F).

Annual mean temperature at Lachute as warming stripes, 1964 to 1983
Year	Annual mean temperature	Difference from the station mean
1964	5.3 C	+0.31 C
1965	4.5 C	-0.54 C
1966	5.2 C	+0.15 C
1967	4.6 C	-0.46 C
1968	4.8 C	-0.25 C
1969	5.3 C	+0.25 C
1970	4.8 C	-0.21 C
1971	4.8 C	-0.24 C
1972	4.1 C	-0.96 C
1973	6.0 C	+1.01 C
1974	4.5 C	-0.53 C
1975	5.6 C	+0.55 C
1976	4.1 C	-0.94 C
1977	5.4 C	+0.39 C
1978	4.5 C	-0.53 C
1979	5.6 C	+0.61 C
1980	4.5 C	-0.53 C
1981	5.9 C	+0.87 C
1982	5.1 C	+0.04 C
1983	6.0 C	+0.97 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

1963 to 1983

Yearly extremes at Lachute: the record and the median year
Measure	Record	Year of the record	Median year	Years with a value
Hottest day (TXx)	35.0 C (95.0 F)	1964	32.8 C (91.0 F)	21
Coldest night (TNn)	-37.0 C (-34.6 F)	1981	-33.3 C (-27.9 F)	21
Wettest day (Rx1day)	66.3 mm (2.6 in)	1963	45.0 mm (1.8 in)	21
Wettest five days (Rx5day)	117.4 mm (4.6 in)	1972	67.1 mm (2.6 in)	21
Longest dry spell (CDD)	22 days	1977	15 days	21

Hottest day (TXx)

The hottest day of the year at Lachute, 1963 to 1983. The record is 35.0 C (95.0 F) in 1964, marked on the chart; the median year is 32.8 C (91.0 F).

Hottest day (TXx) at Lachute by year
Year	Hottest day (TXx)
1963	33.3 C (91.9 F)
1964	35.0 C (95.0 F)
1965	31.7 C (89.1 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	32.2 C (90.0 F)
1971	33.3 C (91.9 F)
1972	30.6 C (87.1 F)
1973	31.7 C (89.1 F)
1974	30.0 C (86.0 F)
1975	35.0 C (95.0 F)
1976	31.7 C (89.1 F)
1977	32.2 C (90.0 F)
1978	33.9 C (93.0 F)
1979	32.2 C (90.0 F)
1980	32.0 C (89.6 F)
1981	33.0 C (91.4 F)
1982	33.5 C (92.3 F)
1983	33.0 C (91.4 F)

Coldest night (TNn)

The coldest night of the year at Lachute, 1963 to 1983. The record is -37.0 C (-34.6 F) in 1981, marked on the chart; the median year is -33.3 C (-27.9 F).

Coldest night (TNn) at Lachute by year
Year	Coldest night (TNn)
1963	-33.9 C (-29.0 F)
1964	-30.0 C (-22.0 F)
1965	-34.4 C (-29.9 F)
1966	-33.3 C (-27.9 F)
1967	-35.0 C (-31.0 F)
1968	-32.8 C (-27.0 F)
1969	-27.2 C (-17.0 F)
1970	-32.2 C (-26.0 F)
1971	-35.0 C (-31.0 F)
1972	-34.4 C (-29.9 F)
1973	-33.3 C (-27.9 F)
1974	-31.1 C (-24.0 F)
1975	-30.0 C (-22.0 F)
1976	-36.1 C (-33.0 F)
1977	-31.1 C (-24.0 F)
1978	-30.0 C (-22.0 F)
1979	-32.8 C (-27.0 F)
1980	-34.5 C (-30.1 F)
1981	-37.0 C (-34.6 F)
1982	-36.5 C (-33.7 F)
1983	-30.5 C (-22.9 F)

Wettest day (Rx1day)

The wettest day of the year at Lachute, 1963 to 1983. The record is 66.3 mm (2.6 in) in 1963, marked on the chart; the median year is 45.0 mm (1.8 in).

Wettest day (Rx1day) at Lachute by year
Year	Wettest day (Rx1day)
1963	66.3 mm (2.6 in)
1964	26.9 mm (1.1 in)
1965	38.1 mm (1.5 in)
1966	38.9 mm (1.5 in)
1967	42.9 mm (1.7 in)
1968	38.1 mm (1.5 in)
1969	34.5 mm (1.4 in)
1970	46.0 mm (1.8 in)
1971	30.5 mm (1.2 in)
1972	49.0 mm (1.9 in)
1973	62.2 mm (2.4 in)
1974	48.8 mm (1.9 in)
1975	64.5 mm (2.5 in)
1976	36.3 mm (1.4 in)
1977	49.0 mm (1.9 in)
1978	62.2 mm (2.4 in)
1979	48.3 mm (1.9 in)
1980	37.8 mm (1.5 in)
1981	42.4 mm (1.7 in)
1982	56.0 mm (2.2 in)
1983	45.0 mm (1.8 in)

Wettest five days (Rx5day)

The wettest five days of the year at Lachute, 1963 to 1983. The record is 117.4 mm (4.6 in) in 1972, marked on the chart; the median year is 67.1 mm (2.6 in).

Wettest five days (Rx5day) at Lachute by year
Year	Wettest five days (Rx5day)
1963	70.9 mm (2.8 in)
1964	61.5 mm (2.4 in)
1965	60.5 mm (2.4 in)
1966	63.3 mm (2.5 in)
1967	48.0 mm (1.9 in)
1968	52.6 mm (2.1 in)
1969	49.4 mm (1.9 in)
1970	67.1 mm (2.6 in)
1971	50.6 mm (2.0 in)
1972	117.4 mm (4.6 in)
1973	84.6 mm (3.3 in)
1974	59.7 mm (2.4 in)
1975	81.3 mm (3.2 in)
1976	53.3 mm (2.1 in)
1977	66.5 mm (2.6 in)
1978	74.4 mm (2.9 in)
1979	86.1 mm (3.4 in)
1980	69.2 mm (2.7 in)
1981	82.2 mm (3.2 in)
1982	76.2 mm (3.0 in)
1983	90.8 mm (3.6 in)

Longest dry spell (CDD)

The longest dry spell of the year at Lachute, 1963 to 1983. The record is 22 days in 1977, marked on the chart; the median year is 15 days.

Longest dry spell (CDD) at Lachute by year
Year	Longest dry spell (CDD)
1963	19 days
1964	15 days
1965	19 days
1966	12 days
1967	16 days
1968	14 days
1969	19 days
1970	18 days
1971	12 days
1972	11 days
1973	11 days
1974	14 days
1975	17 days
1976	15 days
1977	22 days
1978	17 days
1979	12 days
1980	20 days
1981	9 days
1982	15 days
1983	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.

Frost Dates and Growing Season

20 years with a frost

Across 20 years with a frost, the median last spring frost at Lachute falls on 11 May and the median first autumn frost on 27 September, which leaves a median of 138 days between them.

Frost dates and growing season at Lachute
Measure	Median, all years	Earliest period	Recent period (1964 to 1983)	Recent against earliest	Fitted trend
Last spring frost	11 May	n/a	11 May	n/a	n/a
First autumn frost	27 September	n/a	27 September	n/a	n/a
Growing days	138 days	n/a	138 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 Lachute standing records by year: CSV or JSON. Field meanings are on the data page.
Data for Lachute 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 2026-10-14 (14 October 2026). Records are computed by this site and are not official.

Data as of 2026-10-14. Last revised 14 October 2026 (2026-10-14).