St Jerome Weather Records (CA007037400)

Record envelope, standing records and threshold days for St Jerome (CA007037400), Quebec, Canada, with 93 years of record.

Key Facts for St Jerome

St Jerome (CA007037400) is a weather station in Quebec, Canada at 45.80 latitude and -74.05 longitude, 170 m (558 ft) above sea level.
The station reports from 1932 to 2024, 93 years of record.
1,464 records set at St Jerome still stand.
Records are tracked for tmax, tmin, prcp, snow: an element needs 30 years of data to be eligible.
St Jerome set a daily record low maximum temperature of -18.0 C (-0.4 F) on 24 December 1983.

About the Station

Location: Quebec, Canada, 45.80 latitude, -74.05 longitude.
Elevation: 170 m (558 ft).
Period of record: 1932 to 2024, 93 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 St Jerome. 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 Jerome, 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)	-41.7 C (-43.1 F)	n/a	n/a
Feb	10.6 C (51.1 F)	-41.1 C (-42.0 F)	n/a	n/a
Mar	23.9 C (75.0 F)	-32.8 C (-27.0 F)	n/a	n/a
Apr	28.9 C (84.0 F)	-21.7 C (-7.1 F)	n/a	n/a
May	32.2 C (90.0 F)	-8.3 C (17.1 F)	n/a	n/a
Jun	35.6 C (96.1 F)	-1.7 C (28.9 F)	n/a	n/a
Jul	35.6 C (96.1 F)	2.8 C (37.0 F)	n/a	n/a
Aug	35.6 C (96.1 F)	0.0 C (32.0 F)	n/a	n/a
Sep	31.7 C (89.1 F)	-5.6 C (21.9 F)	n/a	n/a
Oct	28.3 C (82.9 F)	-11.7 C (10.9 F)	n/a	n/a
Nov	22.2 C (72.0 F)	-26.1 C (-15.0 F)	n/a	n/a
Dec	20.0 C (68.0 F)	-40.0 C (-40.0 F)	n/a	n/a

Which Years Hold Standing Records

1,464 standing records

1,464 records at St Jerome still stand. 1953 holds the most, with 60.

Standing records at St Jerome by the year they were set
Year set	Standing records
1932	18
1933	44
1934	49
1935	24
1936	47
1937	23
1938	26
1939	25
1940	33
1941	28
1942	34
1943	29
1944	29
1945	39
1946	37
1947	45
1948	27
1949	26
1950	30
1951	29
1952	15
1953	60
1954	25
1955	28
1956	29
1957	28
1958	28
1959	24
1960	12
1961	14
1962	20
1963	22
1964	27
1965	23
1966	32
1967	14
1968	32
1969	21
1970	22
1971	19
1972	23
1973	22
1974	29
1975	22
1976	33
1977	24
1978	15
1979	41
1980	21
1981	38
1982	26
1983	33

All-Time Record Progression

4 new records

4 all-time records were set at St Jerome between 17 April 1967 and 22 June 1981. Each dot is a new record.

When St Jerome set new all-time records
Date	Kind	Detail
1967-04-17	Record daily precipitation	Record daily precipitation 76.5 mm (3.0 in)
1979-10-05	Record daily precipitation	Record daily precipitation 79.8 mm (3.1 in)
1981-01-03	Record low maximum temperature	Record low maximum temperature -29.4 C (-20.9 F)
1981-06-22	Record daily precipitation	Record daily precipitation 89.2 mm (3.5 in)

Wettest Day of Each Month

Jun: 89.2 mm (3.5 in)

The wettest day on record for each calendar month at St Jerome. The most was 89.2 mm (3.5 in) on 22 June 1981.

Record daily precipitation for each month at St Jerome
Month	Record daily precipitation (mm)	Date
Jan	52.6 mm (2.1 in)	25 January 1938
Feb	43.2 mm (1.7 in)	7 February 1965
Mar	44.5 mm (1.8 in)	23 March 1968
Apr	76.5 mm (3.0 in)	17 April 1967
May	61.0 mm (2.4 in)	12 May 1952
Jun	89.2 mm (3.5 in)	22 June 1981
Jul	65.5 mm (2.6 in)	9 July 1949
Aug	73.7 mm (2.9 in)	24 August 1933
Sep	72.9 mm (2.9 in)	13 September 1949
Oct	79.8 mm (3.1 in)	5 October 1979
Nov	47.8 mm (1.9 in)	19 November 1948
Dec	61.0 mm (2.4 in)	30 December 1942

Period of Record Coverage

1932 to 1983

52 years of record at St Jerome, 1932 to 1983. 4 years have data for under 90 percent of days and are left out of rankings: 1932, 1961, 1963, 1974.

Days with data per year at St Jerome
Year	Days with data	Share of year	Complete
1932	227	62%	No
1933	365	100%	Yes
1934	365	100%	Yes
1935	364	100%	Yes
1936	366	100%	Yes
1937	363	99%	Yes
1938	365	100%	Yes
1939	365	100%	Yes
1940	366	100%	Yes
1941	365	100%	Yes
1942	365	100%	Yes
1943	365	100%	Yes
1944	365	100%	Yes
1945	365	100%	Yes
1946	365	100%	Yes
1947	365	100%	Yes
1948	366	100%	Yes
1949	365	100%	Yes
1950	362	99%	Yes
1951	361	99%	Yes
1952	366	100%	Yes
1953	365	100%	Yes
1954	365	100%	Yes
1955	364	100%	Yes
1956	364	99%	Yes
1957	362	99%	Yes
1958	364	100%	Yes
1959	365	100%	Yes
1960	335	92%	Yes
1961	301	82%	No
1962	363	99%	Yes
1963	271	74%	No
1964	362	99%	Yes
1965	362	99%	Yes
1966	365	100%	Yes
1967	365	100%	Yes
1968	365	100%	Yes
1969	365	100%	Yes
1970	365	100%	Yes
1971	362	99%	Yes
1972	366	100%	Yes
1973	365	100%	Yes
1974	317	87%	No
1975	365	100%	Yes
1976	366	100%	Yes
1977	363	99%	Yes
1978	365	100%	Yes
1979	360	99%	Yes
1980	362	99%	Yes
1981	363	99%	Yes
1982	360	99%	Yes
1983	348	95%	Yes

Latest Records

Latest records at St Jerome
Date	Station	Record	Value	Beat old record by	Old record stood	Significance
24 December 1983	St Jerome, CA	daily low max	-18.0 C (-0.4 F)	0.8 C (1.4 F)	8 years	8 of 100 (Routine)
22 December 1983	St Jerome, CA	daily rain	21.0 mm (0.8 in)	0.9 mm (0.04 in)	18 years	11 of 100 (Routine)
22 December 1983	St Jerome, CA	daily snowfall	21.0 cm (8.3 in)	0.9 cm (0.4 in)	18 years	11 of 100 (Routine)
15 December 1983	St Jerome, CA	daily high min	-1.5 C (29.3 F)	0.7 C (1.3 F)	29 years	13 of 100 (Routine)
13 December 1983	St Jerome, CA	daily rain	42.0 mm (1.7 in)	25.5 mm (1.0 in)	4 years	38 of 100 (Notable)
6 December 1983	St Jerome, CA	daily rain	26.0 mm (1.0 in)	9.5 mm (0.37 in)	34 years	27 of 100 (Routine)
6 December 1983	St Jerome, CA	daily snowfall	26.0 cm (10.2 in)	10.8 cm (4.3 in)	6 years	22 of 100 (Routine)
16 November 1983	St Jerome, CA	daily snowfall	19.0 cm (7.5 in)	13.9 cm (5.5 in)	17 years	36 of 100 (Notable)
16 November 1983	St Jerome, CA	daily rain	19.0 mm (0.7 in)	1.5 mm (0.06 in)	5 years	7 of 100 (Routine)
4 November 1983	St Jerome, CA	daily rain	34.2 mm (1.3 in)	10.4 mm (0.4 in)	0 years	17 of 100 (Routine)
4 November 1983	St Jerome, CA	daily snowfall	6.0 cm (2.4 in)	0.9 cm (0.4 in)	10 years	9 of 100 (Routine)
13 October 1983	St Jerome, CA	daily high min	12.0 C (53.6 F)	0.3 C (0.5 F)	9 years	7 of 100 (Routine)
3 October 1983	St Jerome, CA	daily high max	25.0 C (77.0 F)	0.6 C (1.1 F)	29 years	14 of 100 (Routine)
3 October 1983	St Jerome, CA	daily high min	14.0 C (57.2 F)	1.8 C (3.2 F)	14 years	12 of 100 (Routine)
21 September 1983	St Jerome, CA	daily high max	29.5 C (85.1 F)	2.3 C (4.1 F)	17 years	14 of 100 (Routine)
20 September 1983	St Jerome, CA	daily high max	30.5 C (86.9 F)	1.6 C (2.9 F)	36 years	19 of 100 (Routine)
10 September 1983	St Jerome, CA	daily high min	17.0 C (62.6 F)	0.3 C (0.5 F)	21 years	11 of 100 (Routine)
5 September 1983	St Jerome, CA	daily high max	31.5 C (88.7 F)	2.1 C (3.8 F)	34 years	19 of 100 (Routine)
4 September 1983	St Jerome, CA	daily high max (Tie)	30.0 C (86.0 F)	tie	29 years	3 of 100 (Routine)
6 August 1983	St Jerome, CA	daily high max	32.0 C (89.6 F)	0.9 C (1.6 F)	45 years	20 of 100 (Routine)

Climate Trend

41 complete years, 1933 to 1983

One stripe for each of 41 complete years at St Jerome, 1933 to 1983. Blue stripes are years cooler than the station's own mean of 4.6 C (40.3 F); red stripes are warmer. The coolest year was 1943, at 3.4 C (38.1 F), and the warmest was 1953, at 6.7 C (44.0 F). The strongest colour marks a difference of 2.1 C (3.8 F).

Annual mean temperature at St Jerome as warming stripes, 1933 to 1983
Year	Annual mean temperature	Difference from the station mean
1933	4.4 C	-0.25 C
1934	3.6 C	-1.04 C
1935	4.1 C	-0.50 C
1936	3.9 C	-0.69 C
1937	5.5 C	+0.91 C
1939	3.8 C	-0.82 C
1941	5.1 C	+0.47 C
1942	4.9 C	+0.28 C
1943	3.4 C	-1.21 C
1945	4.3 C	-0.31 C
1946	4.5 C	-0.13 C
1947	4.0 C	-0.57 C
1948	4.6 C	-0.01 C
1949	5.2 C	+0.62 C
1951	4.8 C	+0.16 C
1953	6.7 C	+2.05 C
1954	4.6 C	-0.03 C
1955	5.1 C	+0.52 C
1956	4.2 C	-0.38 C
1957	5.0 C	+0.37 C
1958	3.6 C	-0.96 C
1959	4.5 C	-0.14 C
1962	4.1 C	-0.54 C
1964	5.0 C	+0.38 C
1965	4.2 C	-0.45 C
1966	4.8 C	+0.23 C
1967	4.1 C	-0.47 C
1968	4.4 C	-0.21 C
1969	5.0 C	+0.38 C
1970	4.5 C	-0.10 C
1971	4.5 C	-0.11 C
1972	3.6 C	-1.01 C
1973	5.6 C	+1.03 C
1975	5.3 C	+0.66 C
1976	3.8 C	-0.85 C
1978	4.2 C	-0.37 C
1979	5.2 C	+0.62 C
1980	4.1 C	-0.53 C
1981	5.7 C	+1.10 C
1982	4.9 C	+0.28 C
1983	6.3 C	+1.68 C

The fitted trend in annual mean temperature here over 1933 to 1983 is 0.12 C (-0.03 to 0.27) per decade. The interval includes zero, so the trend is not clearly different from zero. In Fahrenheit: 0.22 F (-0.05 to 0.48) per decade. The slope is a straight line fitted to 41 complete years; the brackets give its 95 percent interval.

Fitted temperature trends per decade at St Jerome
Measure	Per decade (C)	Per decade (F)	Period	Complete years	Reading
Annual mean temperature	0.12 C (-0.03 to 0.27) per decade	0.22 F (-0.05 to 0.48) per decade	1933 to 1983	41	Not clearly different from zero
Mean daily maximum	-0.11 C (-0.28 to 0.05) per decade	-0.2 F (-0.5 to 0.1) per decade	1933 to 1983	41	Not clearly different from zero
Mean daily minimum	0.4 C (0.2 to 0.5) per decade	0.6 F (0.3 to 0.9) per decade	1933 to 1983	41	Rise

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

1932 to 1983

Yearly extremes at St Jerome: the record and the median year
Measure	Record	Year of the record	Median year	Years with a value
Hottest day (TXx)	35.6 C (96.1 F)	1933	32.2 C (90.0 F)	52
Coldest night (TNn)	-41.7 C (-43.1 F)	1957	-35.0 C (-31.0 F)	52
Wettest day (Rx1day)	89.2 mm (3.5 in)	1981	46.6 mm (1.8 in)	52
Wettest five days (Rx5day)	139.2 mm (5.5 in)	1981	72.8 mm (2.9 in)	52
Longest dry spell (CDD)	36 days	1961	15 days	52

Hottest day (TXx)

The hottest day of the year at St Jerome, 1932 to 1983. The record is 35.6 C (96.1 F) in 1933, marked on the chart; the median year is 32.2 C (90.0 F).

Hottest day (TXx) at St Jerome by year
Year	Hottest day (TXx)
1932	31.1 C (88.0 F)
1933	35.6 C (96.1 F)
1934	32.8 C (91.0 F)
1935	32.2 C (90.0 F)
1936	31.7 C (89.1 F)
1937	33.3 C (91.9 F)
1938	33.3 C (91.9 F)
1939	32.8 C (91.0 F)
1940	31.7 C (89.1 F)
1941	33.9 C (93.0 F)
1942	32.2 C (90.0 F)
1943	31.7 C (89.1 F)
1944	35.6 C (96.1 F)
1945	31.7 C (89.1 F)
1946	32.8 C (91.0 F)
1947	33.3 C (91.9 F)
1948	34.4 C (93.9 F)
1949	33.9 C (93.0 F)
1950	31.1 C (88.0 F)
1951	30.0 C (86.0 F)
1952	32.2 C (90.0 F)
1953	35.0 C (95.0 F)
1954	30.0 C (86.0 F)
1955	35.6 C (96.1 F)
1956	31.7 C (89.1 F)
1957	32.2 C (90.0 F)
1958	30.6 C (87.1 F)
1959	33.3 C (91.9 F)
1960	31.7 C (89.1 F)
1961	29.4 C (84.9 F)
1962	32.2 C (90.0 F)
1963	32.2 C (90.0 F)
1964	34.4 C (93.9 F)
1965	31.7 C (89.1 F)
1966	34.4 C (93.9 F)
1967	30.0 C (86.0 F)
1968	32.2 C (90.0 F)
1969	31.7 C (89.1 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	30.6 C (87.1 F)
1975	35.6 C (96.1 F)
1976	31.7 C (89.1 F)
1977	31.1 C (88.0 F)
1978	32.2 C (90.0 F)
1979	31.1 C (88.0 F)
1980	31.1 C (88.0 F)
1981	32.2 C (90.0 F)
1982	33.0 C (91.4 F)
1983	33.0 C (91.4 F)

Coldest night (TNn)

The coldest night of the year at St Jerome, 1932 to 1983. The record is -41.7 C (-43.1 F) in 1957, marked on the chart; the median year is -35.0 C (-31.0 F).

Coldest night (TNn) at St Jerome by year
Year	Coldest night (TNn)
1932	-30.6 C (-23.1 F)
1933	-40.0 C (-40.0 F)
1934	-41.1 C (-42.0 F)
1935	-40.0 C (-40.0 F)
1936	-32.2 C (-26.0 F)
1937	-31.1 C (-24.0 F)
1938	-35.0 C (-31.0 F)
1939	-31.7 C (-25.1 F)
1940	-33.9 C (-29.0 F)
1941	-30.6 C (-23.1 F)
1942	-40.0 C (-40.0 F)
1943	-38.3 C (-36.9 F)
1944	-35.0 C (-31.0 F)
1945	-37.2 C (-35.0 F)
1946	-35.6 C (-32.1 F)
1947	-35.0 C (-31.0 F)
1948	-36.1 C (-33.0 F)
1949	-30.0 C (-22.0 F)
1950	-36.1 C (-33.0 F)
1951	-34.4 C (-29.9 F)
1952	-35.6 C (-32.1 F)
1953	-30.0 C (-22.0 F)
1954	-35.6 C (-32.1 F)
1955	-35.6 C (-32.1 F)
1956	-28.9 C (-20.0 F)
1957	-41.7 C (-43.1 F)
1958	-35.0 C (-31.0 F)
1959	-36.1 C (-33.0 F)
1960	-32.8 C (-27.0 F)
1961	-33.9 C (-29.0 F)
1962	-36.1 C (-33.0 F)
1963	-36.7 C (-34.1 F)
1964	-31.1 C (-24.0 F)
1965	-38.3 C (-36.9 F)
1966	-40.0 C (-40.0 F)
1967	-35.6 C (-32.1 F)
1968	-35.6 C (-32.1 F)
1969	-27.2 C (-17.0 F)
1970	-31.1 C (-24.0 F)
1971	-35.6 C (-32.1 F)
1972	-34.4 C (-29.9 F)
1973	-33.9 C (-29.0 F)
1974	-31.1 C (-24.0 F)
1975	-31.1 C (-24.0 F)
1976	-33.3 C (-27.9 F)
1977	-30.6 C (-23.1 F)
1978	-31.1 C (-24.0 F)
1979	-31.7 C (-25.1 F)
1980	-35.0 C (-31.0 F)
1981	-37.8 C (-36.0 F)
1982	-33.5 C (-28.3 F)
1983	-30.0 C (-22.0 F)

Wettest day (Rx1day)

The wettest day of the year at St Jerome, 1932 to 1983. The record is 89.2 mm (3.5 in) in 1981, marked on the chart; the median year is 46.6 mm (1.8 in).

Wettest day (Rx1day) at St Jerome by year
Year	Wettest day (Rx1day)
1932	58.4 mm (2.3 in)
1933	73.7 mm (2.9 in)
1934	52.6 mm (2.1 in)
1935	57.2 mm (2.3 in)
1936	58.4 mm (2.3 in)
1937	42.2 mm (1.7 in)
1938	52.6 mm (2.1 in)
1939	50.8 mm (2.0 in)
1940	33.5 mm (1.3 in)
1941	58.9 mm (2.3 in)
1942	61.0 mm (2.4 in)
1943	46.5 mm (1.8 in)
1944	36.3 mm (1.4 in)
1945	45.0 mm (1.8 in)
1946	50.0 mm (2.0 in)
1947	44.2 mm (1.7 in)
1948	47.8 mm (1.9 in)
1949	72.9 mm (2.9 in)
1950	54.4 mm (2.1 in)
1951	33.8 mm (1.3 in)
1952	61.0 mm (2.4 in)
1953	46.7 mm (1.8 in)
1954	41.9 mm (1.6 in)
1955	39.4 mm (1.6 in)
1956	35.3 mm (1.4 in)
1957	37.1 mm (1.5 in)
1958	54.6 mm (2.1 in)
1959	66.8 mm (2.6 in)
1960	38.4 mm (1.5 in)
1961	55.1 mm (2.2 in)
1962	40.6 mm (1.6 in)
1963	53.8 mm (2.1 in)
1964	26.9 mm (1.1 in)
1965	62.2 mm (2.4 in)
1966	45.7 mm (1.8 in)
1967	76.5 mm (3.0 in)
1968	44.5 mm (1.8 in)
1969	41.1 mm (1.6 in)
1970	41.4 mm (1.6 in)
1971	33.0 mm (1.3 in)
1972	50.5 mm (2.0 in)
1973	41.4 mm (1.6 in)
1974	38.1 mm (1.5 in)
1975	56.6 mm (2.2 in)
1976	41.9 mm (1.6 in)
1977	31.2 mm (1.2 in)
1978	66.5 mm (2.6 in)
1979	79.8 mm (3.1 in)
1980	43.7 mm (1.7 in)
1981	89.2 mm (3.5 in)
1982	31.0 mm (1.2 in)
1983	43.0 mm (1.7 in)

Wettest five days (Rx5day)

The wettest five days of the year at St Jerome, 1932 to 1983. The record is 139.2 mm (5.5 in) in 1981, marked on the chart; the median year is 72.8 mm (2.9 in).

Wettest five days (Rx5day) at St Jerome by year
Year	Wettest five days (Rx5day)
1932	118.4 mm (4.7 in)
1933	86.1 mm (3.4 in)
1934	73.9 mm (2.9 in)
1935	80.2 mm (3.2 in)
1936	90.4 mm (3.6 in)
1937	92.5 mm (3.6 in)
1938	66.6 mm (2.6 in)
1939	94.3 mm (3.7 in)
1940	52.8 mm (2.1 in)
1941	84.6 mm (3.3 in)
1942	82.6 mm (3.3 in)
1943	71.3 mm (2.8 in)
1944	55.8 mm (2.2 in)
1945	81.3 mm (3.2 in)
1946	59.7 mm (2.4 in)
1947	80.3 mm (3.2 in)
1948	68.7 mm (2.7 in)
1949	78.5 mm (3.1 in)
1950	90.0 mm (3.5 in)
1951	54.1 mm (2.1 in)
1952	106.3 mm (4.2 in)
1953	71.8 mm (2.8 in)
1954	71.1 mm (2.8 in)
1955	61.8 mm (2.4 in)
1956	76.3 mm (3.0 in)
1957	78.9 mm (3.1 in)
1958	73.2 mm (2.9 in)
1959	81.3 mm (3.2 in)
1960	58.7 mm (2.3 in)
1961	66.4 mm (2.6 in)
1962	47.0 mm (1.9 in)
1963	72.3 mm (2.8 in)
1964	43.7 mm (1.7 in)
1965	101.3 mm (4.0 in)
1966	53.1 mm (2.1 in)
1967	92.0 mm (3.6 in)
1968	65.1 mm (2.6 in)
1969	63.5 mm (2.5 in)
1970	62.0 mm (2.4 in)
1971	80.0 mm (3.1 in)
1972	74.2 mm (2.9 in)
1973	67.8 mm (2.7 in)
1974	61.0 mm (2.4 in)
1975	78.4 mm (3.1 in)
1976	62.7 mm (2.5 in)
1977	49.5 mm (1.9 in)
1978	69.8 mm (2.7 in)
1979	86.7 mm (3.4 in)
1980	72.4 mm (2.9 in)
1981	139.2 mm (5.5 in)
1982	57.1 mm (2.2 in)
1983	84.4 mm (3.3 in)

Longest dry spell (CDD)

The longest dry spell of the year at St Jerome, 1932 to 1983. The record is 36 days in 1961, marked on the chart; the median year is 15 days.

Longest dry spell (CDD) at St Jerome by year
Year	Longest dry spell (CDD)
1932	14 days
1933	22 days
1934	10 days
1935	17 days
1936	8 days
1937	9 days
1938	12 days
1939	21 days
1940	12 days
1941	23 days
1942	14 days
1943	12 days
1944	19 days
1945	9 days
1946	12 days
1947	20 days
1948	16 days
1949	17 days
1950	16 days
1951	14 days
1952	12 days
1953	15 days
1954	9 days
1955	10 days
1956	12 days
1957	18 days
1958	15 days
1959	11 days
1960	11 days
1961	36 days
1962	16 days
1963	19 days
1964	15 days
1965	18 days
1966	11 days
1967	18 days
1968	13 days
1969	12 days
1970	18 days
1971	11 days
1972	11 days
1973	16 days
1974	14 days
1975	17 days
1976	15 days
1977	22 days
1978	23 days
1979	14 days
1980	26 days
1981	24 days
1982	21 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.

Frost Dates and Growing Season

41 years with a frost

Across 41 years with a frost, the median last spring frost at St Jerome falls on 17 May and the median first autumn frost on 23 September, which leaves a median of 128 days between them.

Fitted over all years, the growing season changes by +2.3 days per decade at this station.

Frost dates and growing season at St Jerome
Measure	Median, all years	Earliest period	Recent period (1947 to 1983)	Recent against earliest	Fitted trend
Last spring frost	17 May	n/a	17 May	n/a	-1.3 days per decade
First autumn frost	23 September	n/a	22 September	n/a	+1.0 days per decade
Growing days	128 days	n/a	133 days	n/a	+2.3 days per decade

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.

Rainfall Return Levels

47 years, 1934 to 1983

A day with at least 47.1 mm (1.9 in) of rain is expected about once in 2 years. A day with at least 92.9 mm (3.7 in) of rain is expected about once in 100 years.

Rainfall return levels at St Jerome: the daily rain expected about once in a given number of years
Expected about once in	A day with at least	Note
2 years	47.1 mm (1.9 in)
5 years	59.4 mm (2.3 in)
10 years	67.6 mm (2.7 in)
25 years	77.8 mm (3.1 in)
50 years	85.4 mm (3.4 in)	Longer than the 47 years of record
100 years	92.9 mm (3.7 in)	Longer than the 47 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, 47 years of values from 1934 to 1983.

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: 89.2 mm (3.5 in) in 1981; 79.8 mm (3.1 in) in 1979; 76.5 mm (3.0 in) in 1967.

Station Changes

No change in the annual mean temperature of this station was found against its neighbours.

Download the Data

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