Waltham Weather Records (CA007038880)

Record envelope, standing records and threshold days for Waltham (CA007038880), Quebec, Canada, with 42 years of record.

Key Facts for Waltham

Waltham (CA007038880) is a weather station in Quebec, Canada at 45.92 latitude and -76.92 longitude, 113 m (371 ft) above sea level.
The station reports from 1953 to 1994, 42 years of record.
1,334 records set at Waltham 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, 45.92 latitude, -76.92 longitude.
Elevation: 113 m (371 ft).
Period of record: 1953 to 1994, 42 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 Waltham. 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 Waltham, with 2026 drawn through them
Month	Highest record high	Lowest record low	2026 highest maximum	2026 lowest minimum
Jan	6.7 C (44.1 F)	-29.4 C (-20.9 F)	n/a	n/a
Feb	2.2 C (36.0 F)	-29.4 C (-20.9 F)	n/a	n/a
Mar	9.4 C (48.9 F)	-22.8 C (-9.0 F)	n/a	n/a
Apr	19.4 C (66.9 F)	-11.7 C (10.9 F)	n/a	n/a
May	26.1 C (79.0 F)	-4.4 C (24.1 F)	n/a	n/a
Jun	28.9 C (84.0 F)	6.7 C (44.1 F)	n/a	n/a
Jul	32.2 C (90.0 F)	10.0 C (50.0 F)	n/a	n/a
Aug	32.2 C (90.0 F)	10.0 C (50.0 F)	n/a	n/a
Sep	31.1 C (88.0 F)	0.0 C (32.0 F)	n/a	n/a
Oct	18.3 C (64.9 F)	-5.0 C (23.0 F)	n/a	n/a
Nov	10.0 C (50.0 F)	-11.7 C (10.9 F)	n/a	n/a
Dec	n/a	n/a	n/a	n/a

Which Years Hold Standing Records

1,334 standing records

1,334 records at Waltham still stand. 1974 holds the most, with 1,114.

Wettest Day of Each Month

Oct: 67.3 mm (2.6 in)

The wettest day on record for each calendar month at Waltham. The most was 67.3 mm (2.6 in) on 15 October 1955.

Record daily precipitation for each month at Waltham
Month	Record daily precipitation (mm)	Date
Jan	37.8 mm (1.5 in)	20 January 1954
Feb	28.8 mm (1.1 in)	2 February 1983
Mar	36.3 mm (1.4 in)	31 March 1976
Apr	39.6 mm (1.6 in)	18 April 1975
May	38.6 mm (1.5 in)	7 May 1983
Jun	46.0 mm (1.8 in)	21 June 1967
Jul	52.3 mm (2.1 in)	20 July 1970
Aug	59.9 mm (2.4 in)	23 August 1956
Sep	47.2 mm (1.9 in)	11 September 1968
Oct	67.3 mm (2.6 in)	15 October 1955
Nov	39.9 mm (1.6 in)	20 November 1974
Dec	35.6 mm (1.4 in)	4 December 1961

Period of Record Coverage

1973 to 1975

3 years of record at Waltham, 1973 to 1975. 2 years have data for under 90 percent of days and are left out of rankings: 1973, 1975.

Latest Records

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

Extremes by Year

1953 to 1983

Yearly extremes at Waltham: the record and the median year
Measure	Record	Year of the record	Median year	Years with a value
Hottest day (TXx)	32.2 C (90.0 F)	1974	31.1 C (88.0 F)	3
Coldest night (TNn)	-29.4 C (-20.9 F)	1974	-29.4 C (-20.9 F)	3
Wettest day (Rx1day)	67.3 mm (2.6 in)	1955	39.8 mm (1.6 in)	30
Wettest five days (Rx5day)	140.7 mm (5.5 in)	1955	67.9 mm (2.7 in)	30
Longest dry spell (CDD)	25 days	1957	15 days	30

Hottest day (TXx)

The hottest day of the year at Waltham, 1953 to 1983. The record is 32.2 C (90.0 F) in 1974, marked on the chart; the median year is 31.1 C (88.0 F).

Hottest day (TXx) at Waltham by year
Year	Hottest day (TXx)
1953	n/a
1954	n/a
1955	n/a
1956	n/a
1957	n/a
1958	n/a
1959	n/a
1960	n/a
1961	n/a
1962	n/a
1964	n/a
1965	n/a
1966	n/a
1967	n/a
1968	n/a
1969	n/a
1970	n/a
1971	n/a
1972	n/a
1973	31.1 C (88.0 F)
1974	32.2 C (90.0 F)
1975	6.7 C (44.1 F)
1976	n/a
1977	n/a
1978	n/a
1979	n/a
1980	n/a
1981	n/a
1982	n/a
1983	n/a

Coldest night (TNn)

The coldest night of the year at Waltham, 1953 to 1983. The record is -29.4 C (-20.9 F) in 1974, marked on the chart; the median year is -29.4 C (-20.9 F).

Coldest night (TNn) at Waltham by year
Year	Coldest night (TNn)
1953	n/a
1954	n/a
1955	n/a
1956	n/a
1957	n/a
1958	n/a
1959	n/a
1960	n/a
1961	n/a
1962	n/a
1964	n/a
1965	n/a
1966	n/a
1967	n/a
1968	n/a
1969	n/a
1970	n/a
1971	n/a
1972	n/a
1973	11.1 C (52.0 F)
1974	-29.4 C (-20.9 F)
1975	-29.4 C (-20.9 F)
1976	n/a
1977	n/a
1978	n/a
1979	n/a
1980	n/a
1981	n/a
1982	n/a
1983	n/a

Wettest day (Rx1day)

The wettest day of the year at Waltham, 1953 to 1983. The record is 67.3 mm (2.6 in) in 1955, marked on the chart; the median year is 39.8 mm (1.6 in).

Wettest day (Rx1day) at Waltham by year
Year	Wettest day (Rx1day)
1953	32.3 mm (1.3 in)
1954	37.8 mm (1.5 in)
1955	67.3 mm (2.6 in)
1956	59.9 mm (2.4 in)
1957	54.9 mm (2.2 in)
1958	35.1 mm (1.4 in)
1959	49.8 mm (2.0 in)
1960	26.2 mm (1.0 in)
1961	47.2 mm (1.9 in)
1962	25.9 mm (1.0 in)
1964	33.5 mm (1.3 in)
1965	45.5 mm (1.8 in)
1966	48.8 mm (1.9 in)
1967	46.0 mm (1.8 in)
1968	47.2 mm (1.9 in)
1969	30.0 mm (1.2 in)
1970	52.3 mm (2.1 in)
1971	40.9 mm (1.6 in)
1972	35.6 mm (1.4 in)
1973	37.1 mm (1.5 in)
1974	39.9 mm (1.6 in)
1975	39.6 mm (1.6 in)
1976	41.1 mm (1.6 in)
1977	35.3 mm (1.4 in)
1978	59.2 mm (2.3 in)
1979	59.4 mm (2.3 in)
1980	37.4 mm (1.5 in)
1981	33.0 mm (1.3 in)
1982	32.8 mm (1.3 in)
1983	38.6 mm (1.5 in)

Wettest five days (Rx5day)

The wettest five days of the year at Waltham, 1953 to 1983. The record is 140.7 mm (5.5 in) in 1955, marked on the chart; the median year is 67.9 mm (2.7 in).

Wettest five days (Rx5day) at Waltham by year
Year	Wettest five days (Rx5day)
1953	41.6 mm (1.6 in)
1954	54.1 mm (2.1 in)
1955	140.7 mm (5.5 in)
1956	100.8 mm (4.0 in)
1957	85.9 mm (3.4 in)
1958	56.4 mm (2.2 in)
1959	83.1 mm (3.3 in)
1960	31.7 mm (1.2 in)
1961	54.3 mm (2.1 in)
1962	47.0 mm (1.9 in)
1964	65.8 mm (2.6 in)
1965	77.8 mm (3.1 in)
1966	51.3 mm (2.0 in)
1967	90.0 mm (3.5 in)
1968	72.3 mm (2.8 in)
1969	66.1 mm (2.6 in)
1970	100.7 mm (4.0 in)
1971	43.4 mm (1.7 in)
1972	89.4 mm (3.5 in)
1973	71.7 mm (2.8 in)
1974	64.7 mm (2.5 in)
1975	69.1 mm (2.7 in)
1976	75.1 mm (3.0 in)
1977	49.5 mm (1.9 in)
1978	76.5 mm (3.0 in)
1979	79.8 mm (3.1 in)
1980	76.6 mm (3.0 in)
1981	66.7 mm (2.6 in)
1982	49.0 mm (1.9 in)
1983	61.1 mm (2.4 in)

Longest dry spell (CDD)

The longest dry spell of the year at Waltham, 1953 to 1983. The record is 25 days in 1957, marked on the chart; the median year is 15 days.

Longest dry spell (CDD) at Waltham by year
Year	Longest dry spell (CDD)
1953	15 days
1954	16 days
1955	17 days
1956	15 days
1957	25 days
1958	21 days
1959	15 days
1960	18 days
1961	22 days
1962	15 days
1964	15 days
1965	18 days
1966	12 days
1967	19 days
1968	14 days
1969	13 days
1970	17 days
1971	14 days
1972	13 days
1973	12 days
1974	12 days
1975	19 days
1976	15 days
1977	13 days
1978	17 days
1979	13 days
1980	21 days
1981	15 days
1982	14 days
1983	14 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 Waltham standing records by year: CSV or JSON. Field meanings are on the data page.
Data for Waltham 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 2025-12-31. Last revised 31 December 2025 (2025-12-31).

Year	Days with data	Share of year	Complete
1973	91	25%	No
1974	333	91%	Yes
1975	31	8%	No