St Guillaume Weather Records (CA007027302)

Record envelope, standing records and threshold days for St Guillaume (CA007027302), Quebec, Canada, with 53 years of record.

Key Facts for St Guillaume

St Guillaume (CA007027302) is a weather station in Quebec, Canada at 45.88 latitude and -72.77 longitude, 44 m (144 ft) above sea level.
The station reports from 1963 to 2015, 53 years of record.
1,464 records set at St Guillaume 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, 45.88 latitude, -72.77 longitude.
Elevation: 44 m (144 ft).
Period of record: 1963 to 2015, 53 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 St Guillaume. 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 St Guillaume, with 2026 drawn through them
Month	Highest record high	Lowest record low	2026 highest maximum	2026 lowest minimum
Jan	9.4 C (48.9 F)	-38.9 C (-38.0 F)	n/a	n/a
Feb	16.0 C (60.8 F)	-37.8 C (-36.0 F)	n/a	n/a
Mar	18.9 C (66.0 F)	-30.0 C (-22.0 F)	n/a	n/a
Apr	28.9 C (84.0 F)	-17.8 C (0.0 F)	n/a	n/a
May	32.8 C (91.0 F)	-10.0 C (14.0 F)	n/a	n/a
Jun	33.3 C (91.9 F)	-0.6 C (30.9 F)	n/a	n/a
Jul	35.0 C (95.0 F)	2.5 C (36.5 F)	n/a	n/a
Aug	35.0 C (95.0 F)	1.1 C (34.0 F)	n/a	n/a
Sep	31.7 C (89.1 F)	-5.5 C (22.1 F)	n/a	n/a
Oct	27.8 C (82.0 F)	-9.4 C (15.1 F)	n/a	n/a
Nov	20.6 C (69.1 F)	-25.6 C (-14.1 F)	n/a	n/a
Dec	14.5 C (58.1 F)	-38.9 C (-38.0 F)	n/a	n/a

Which Years Hold Standing Records

1,464 standing records

1,464 records at St Guillaume still stand. 1979 holds the most, with 112.

Standing records at St Guillaume by the year they were set
Year set	Standing records
1963	73
1964	71
1965	63
1967	23
1968	83
1969	53
1970	82
1971	73
1972	80
1973	81
1974	70
1975	59
1976	93
1977	74
1978	67
1979	112
1980	61
1981	92
1982	77
1983	77

Wettest Day of Each Month

Sep: 101.6 mm (4.0 in)

The wettest day on record for each calendar month at St Guillaume. The most was 101.6 mm (4.0 in) on 12 September 1963.

Record daily precipitation for each month at St Guillaume
Month	Record daily precipitation (mm)	Date
Jan	30.5 mm (1.2 in)	26 January 1971
Feb	28.4 mm (1.1 in)	2 February 1973
Mar	36.6 mm (1.4 in)	22 March 1972
Apr	34.5 mm (1.4 in)	13 April 1972
May	34.8 mm (1.4 in)	12 May 1981
Jun	57.6 mm (2.3 in)	30 June 1981
Jul	76.2 mm (3.0 in)	11 July 1976
Aug	55.9 mm (2.2 in)	28 August 1978
Sep	101.6 mm (4.0 in)	12 September 1963
Oct	37.1 mm (1.5 in)	22 October 1970
Nov	36.6 mm (1.4 in)	4 November 1982
Dec	33.0 mm (1.3 in)	20 December 1973

Period of Record Coverage

1963 to 1983

20 years of record at St Guillaume, 1963 to 1983. 5 years have data for under 90 percent of days and are left out of rankings: 1963, 1964, 1965, 1967, 1982.

Days with data per year at St Guillaume
Year	Days with data	Share of year	Complete
1963	291	80%	No
1964	307	84%	No
1965	299	82%	No
1967	98	27%	No
1968	365	100%	Yes
1969	334	92%	Yes
1970	364	100%	Yes
1971	365	100%	Yes
1972	366	100%	Yes
1973	365	100%	Yes
1974	360	99%	Yes
1975	365	100%	Yes
1976	365	100%	Yes
1977	356	98%	Yes
1978	360	99%	Yes
1979	355	97%	Yes
1980	358	98%	Yes
1981	351	96%	Yes
1982	270	74%	No
1983	360	99%	Yes

Latest Records

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

Climate Trend

13 complete years, 1968 to 1983

One stripe for each of 13 complete years at St Guillaume, 1968 to 1983. Blue stripes are years cooler than the station's own mean of 5.1 C (41.2 F); red stripes are warmer. The coolest year was 1976, at 4.2 C (39.6 F), and the warmest was 1973, at 6.3 C (43.4 F). The strongest colour marks a difference of 1.2 C (2.2 F).

Annual mean temperature at St Guillaume as warming stripes, 1968 to 1983
Year	Annual mean temperature	Difference from the station mean
1968	4.8 C	-0.34 C
1970	4.9 C	-0.24 C
1971	4.8 C	-0.33 C
1972	4.4 C	-0.76 C
1973	6.3 C	+1.18 C
1974	4.8 C	-0.30 C
1976	4.2 C	-0.91 C
1977	5.4 C	+0.28 C
1978	4.4 C	-0.71 C
1979	5.9 C	+0.79 C
1980	4.8 C	-0.35 C
1981	6.0 C	+0.86 C
1983	6.0 C	+0.85 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 St Guillaume: 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)	1975	32.8 C (91.0 F)	20
Coldest night (TNn)	-38.9 C (-38.0 F)	1970	-34.1 C (-29.5 F)	20
Wettest day (Rx1day)	101.6 mm (4.0 in)	1963	39.6 mm (1.6 in)	20
Wettest five days (Rx5day)	102.6 mm (4.0 in)	1963	64.8 mm (2.6 in)	20
Longest dry spell (CDD)	30 days	1980	14 days	20

Hottest day (TXx)

The hottest day of the year at St Guillaume, 1963 to 1983. The record is 35.0 C (95.0 F) in 1975, marked on the chart; the median year is 32.8 C (91.0 F).

Hottest day (TXx) at St Guillaume by year
Year	Hottest day (TXx)
1963	33.3 C (91.9 F)
1964	33.3 C (91.9 F)
1965	31.1 C (88.0 F)
1967	28.3 C (82.9 F)
1968	32.8 C (91.0 F)
1969	32.2 C (90.0 F)
1970	33.9 C (93.0 F)
1971	33.3 C (91.9 F)
1972	31.7 C (89.1 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	32.8 C (91.0 F)
1978	32.8 C (91.0 F)
1979	35.0 C (95.0 F)
1980	31.5 C (88.7 F)
1981	32.5 C (90.5 F)
1982	33.0 C (91.4 F)
1983	34.0 C (93.2 F)

Coldest night (TNn)

The coldest night of the year at St Guillaume, 1963 to 1983. The record is -38.9 C (-38.0 F) in 1970, marked on the chart; the median year is -34.1 C (-29.5 F).

Coldest night (TNn) at St Guillaume by year
Year	Coldest night (TNn)
1963	-33.3 C (-27.9 F)
1964	-35.6 C (-32.1 F)
1965	-32.8 C (-27.0 F)
1967	-25.0 C (-13.0 F)
1968	-35.0 C (-31.0 F)
1969	-30.0 C (-22.0 F)
1970	-38.9 C (-38.0 F)
1971	-36.1 C (-33.0 F)
1972	-37.8 C (-36.0 F)
1973	-32.2 C (-26.0 F)
1974	-32.2 C (-26.0 F)
1975	-34.4 C (-29.9 F)
1976	-38.9 C (-38.0 F)
1977	-30.6 C (-23.1 F)
1978	-33.9 C (-29.0 F)
1979	-35.0 C (-31.0 F)
1980	-34.5 C (-30.1 F)
1981	-38.5 C (-37.3 F)
1982	-33.5 C (-28.3 F)
1983	-32.5 C (-26.5 F)

Wettest day (Rx1day)

The wettest day of the year at St Guillaume, 1963 to 1983. The record is 101.6 mm (4.0 in) in 1963, marked on the chart; the median year is 39.6 mm (1.6 in).

Wettest day (Rx1day) at St Guillaume by year
Year	Wettest day (Rx1day)
1963	101.6 mm (4.0 in)
1964	32.5 mm (1.3 in)
1965	23.9 mm (0.9 in)
1967	22.1 mm (0.9 in)
1968	67.1 mm (2.6 in)
1969	40.6 mm (1.6 in)
1970	37.1 mm (1.5 in)
1971	38.6 mm (1.5 in)
1972	36.6 mm (1.4 in)
1973	49.3 mm (1.9 in)
1974	34.0 mm (1.3 in)
1975	34.8 mm (1.4 in)
1976	76.2 mm (3.0 in)
1977	28.2 mm (1.1 in)
1978	55.9 mm (2.2 in)
1979	78.0 mm (3.1 in)
1980	38.0 mm (1.5 in)
1981	57.6 mm (2.3 in)
1982	49.0 mm (1.9 in)
1983	49.4 mm (1.9 in)

Wettest five days (Rx5day)

The wettest five days of the year at St Guillaume, 1963 to 1983. The record is 102.6 mm (4.0 in) in 1963, marked on the chart; the median year is 64.8 mm (2.6 in).

Wettest five days (Rx5day) at St Guillaume by year
Year	Wettest five days (Rx5day)
1963	102.6 mm (4.0 in)
1964	51.8 mm (2.0 in)
1965	49.0 mm (1.9 in)
1967	40.4 mm (1.6 in)
1968	75.8 mm (3.0 in)
1969	51.1 mm (2.0 in)
1970	64.3 mm (2.5 in)
1971	63.1 mm (2.5 in)
1972	65.3 mm (2.6 in)
1973	72.4 mm (2.9 in)
1974	78.2 mm (3.1 in)
1975	58.9 mm (2.3 in)
1976	98.1 mm (3.9 in)
1977	52.9 mm (2.1 in)
1978	65.3 mm (2.6 in)
1979	102.1 mm (4.0 in)
1980	59.0 mm (2.3 in)
1981	68.6 mm (2.7 in)
1982	61.8 mm (2.4 in)
1983	83.7 mm (3.3 in)

Longest dry spell (CDD)

The longest dry spell of the year at St Guillaume, 1963 to 1983. The record is 30 days in 1980, marked on the chart; the median year is 14 days.

Longest dry spell (CDD) at St Guillaume by year
Year	Longest dry spell (CDD)
1963	20 days
1964	14 days
1965	18 days
1967	11 days
1968	13 days
1969	11 days
1970	12 days
1971	10 days
1972	11 days
1973	16 days
1974	15 days
1975	18 days
1976	12 days
1977	14 days
1978	17 days
1979	21 days
1980	30 days
1981	9 days
1982	12 days
1983	12 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.

Download the Data

Data for St Guillaume standing records by year: CSV or JSON. Field meanings are on the data page.
Data for St Guillaume 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).