Glen Allan Weather Records (CA006142803)

Record envelope, standing records and threshold days for Glen Allan (CA006142803), Ontario, Canada, with 70 years of record.

Key Facts for Glen Allan

Glen Allan (CA006142803) is a weather station in Ontario, Canada at 43.68 latitude and -80.72 longitude, 400 m (1,312 ft) above sea level.
The station reports from 1955 to 2024, 70 years of record.
1,464 records set at Glen Allan 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, 43.68 latitude, -80.72 longitude.
Elevation: 400 m (1,312 ft).
Period of record: 1955 to 2024, 70 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 Glen Allan. 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 Glen Allan, with 2026 drawn through them
Month	Highest record high	Lowest record low	2026 highest maximum	2026 lowest minimum
Jan	10.6 C (51.1 F)	-33.9 C (-29.0 F)	n/a	n/a
Feb	9.4 C (48.9 F)	-33.9 C (-29.0 F)	n/a	n/a
Mar	21.1 C (70.0 F)	-31.0 C (-23.8 F)	n/a	n/a
Apr	27.2 C (81.0 F)	-17.8 C (0.0 F)	n/a	n/a
May	30.0 C (86.0 F)	-4.4 C (24.1 F)	n/a	n/a
Jun	32.2 C (90.0 F)	0.5 C (32.9 F)	n/a	n/a
Jul	33.3 C (91.9 F)	3.9 C (39.0 F)	n/a	n/a
Aug	32.8 C (91.0 F)	2.8 C (37.0 F)	n/a	n/a
Sep	32.2 C (90.0 F)	-2.8 C (27.0 F)	n/a	n/a
Oct	28.3 C (82.9 F)	-10.6 C (12.9 F)	n/a	n/a
Nov	21.1 C (70.0 F)	-16.7 C (1.9 F)	n/a	n/a
Dec	17.0 C (62.6 F)	-32.2 C (-26.0 F)	n/a	n/a

Which Years Hold Standing Records

1,464 standing records

1,464 records at Glen Allan still stand. 1979 holds the most, with 80.

Standing records at Glen Allan by the year they were set
Year set	Standing records
1958	26
1959	65
1960	57
1961	48
1962	55
1963	72
1964	60
1965	73
1966	54
1967	71
1968	66
1969	38
1970	41
1971	52
1972	46
1973	59
1974	53
1975	61
1976	64
1977	59
1978	51
1979	80
1980	45
1981	65
1982	47
1983	56

Wettest Day of Each Month

Aug: 104.9 mm (4.1 in)

The wettest day on record for each calendar month at Glen Allan. The most was 104.9 mm (4.1 in) on 5 August 1968.

Record daily precipitation for each month at Glen Allan
Month	Record daily precipitation (mm)	Date
Jan	31.8 mm (1.3 in)	21 January 1959
Feb	38.1 mm (1.5 in)	9 February 1965
Mar	28.8 mm (1.1 in)	30 March 1982
Apr	45.2 mm (1.8 in)	13 April 1979
May	60.5 mm (2.4 in)	16 May 1974
Jun	55.4 mm (2.2 in)	13 June 1966
Jul	54.4 mm (2.1 in)	20 July 1976
Aug	104.9 mm (4.1 in)	5 August 1968
Sep	51.1 mm (2.0 in)	21 September 1967
Oct	56.1 mm (2.2 in)	22 October 1972
Nov	41.9 mm (1.6 in)	13 November 1958
Dec	40.6 mm (1.6 in)	12 December 1972

Period of Record Coverage

1958 to 1983

26 years of record at Glen Allan, 1958 to 1983. 1 years have data for under 90 percent of days and are left out of rankings: 1958.

Days with data per year at Glen Allan
Year	Days with data	Share of year	Complete
1958	153	42%	No
1959	365	100%	Yes
1960	366	100%	Yes
1961	365	100%	Yes
1962	365	100%	Yes
1963	365	100%	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	365	100%	Yes
1974	365	100%	Yes
1975	365	100%	Yes
1976	366	100%	Yes
1977	334	92%	Yes
1978	365	100%	Yes
1979	365	100%	Yes
1980	366	100%	Yes
1981	364	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

23 complete years, 1959 to 1983

One stripe for each of 23 complete years at Glen Allan, 1959 to 1983. Blue stripes are years cooler than the station's own mean of 6.0 C (42.8 F); red stripes are warmer. The coolest year was 1972, at 5.2 C (41.3 F), and the warmest was 1973, at 7.1 C (44.8 F). The strongest colour marks a difference of 1.1 C (2.0 F).

Annual mean temperature at Glen Allan as warming stripes, 1959 to 1983
Year	Annual mean temperature	Difference from the station mean
1959	6.2 C	+0.17 C
1960	5.8 C	-0.19 C
1961	6.3 C	+0.26 C
1962	5.7 C	-0.32 C
1963	5.5 C	-0.51 C
1964	6.3 C	+0.26 C
1966	6.1 C	+0.04 C
1967	5.6 C	-0.45 C
1968	6.2 C	+0.15 C
1969	6.0 C	-0.06 C
1970	5.9 C	-0.09 C
1971	6.3 C	+0.25 C
1972	5.2 C	-0.86 C
1973	7.1 C	+1.09 C
1974	6.0 C	-0.05 C
1975	6.7 C	+0.66 C
1976	5.4 C	-0.63 C
1978	5.4 C	-0.59 C
1979	6.0 C	+0.01 C
1980	5.7 C	-0.32 C
1981	6.2 C	+0.21 C
1982	6.2 C	+0.13 C
1983	6.8 C	+0.81 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

1955 to 1983

Yearly extremes at Glen Allan: the record and the median year
Measure	Record	Year of the record	Median year	Years with a value
Hottest day (TXx)	33.3 C (91.9 F)	1977	31.0 C (87.8 F)	26
Coldest night (TNn)	-33.9 C (-29.0 F)	1977	-27.5 C (-17.5 F)	26
Wettest day (Rx1day)	104.9 mm (4.1 in)	1968	45.2 mm (1.8 in)	29
Wettest five days (Rx5day)	140.0 mm (5.5 in)	1975	76.2 mm (3.0 in)	29
Longest dry spell (CDD)	23 days	1962	15 days	29

Hottest day (TXx)

The hottest day of the year at Glen Allan, 1955 to 1983. The record is 33.3 C (91.9 F) in 1977, marked on the chart; the median year is 31.0 C (87.8 F).

Hottest day (TXx) at Glen Allan by year
Year	Hottest day (TXx)
1955	n/a
1956	n/a
1957	n/a
1958	30.6 C (87.1 F)
1959	31.1 C (88.0 F)
1960	32.2 C (90.0 F)
1961	29.4 C (84.9 F)
1962	30.6 C (87.1 F)
1963	31.7 C (89.1 F)
1964	31.7 C (89.1 F)
1965	30.6 C (87.1 F)
1966	32.2 C (90.0 F)
1967	28.9 C (84.0 F)
1968	31.1 C (88.0 F)
1969	30.6 C (87.1 F)
1970	30.0 C (86.0 F)
1971	32.2 C (90.0 F)
1972	30.6 C (87.1 F)
1973	32.2 C (90.0 F)
1974	31.7 C (89.1 F)
1975	32.8 C (91.0 F)
1976	29.4 C (84.9 F)
1977	33.3 C (91.9 F)
1978	32.5 C (90.5 F)
1979	31.0 C (87.8 F)
1980	30.5 C (86.9 F)
1981	31.0 C (87.8 F)
1982	29.5 C (85.1 F)
1983	31.0 C (87.8 F)

Coldest night (TNn)

The coldest night of the year at Glen Allan, 1955 to 1983. The record is -33.9 C (-29.0 F) in 1977, marked on the chart; the median year is -27.5 C (-17.5 F).

Coldest night (TNn) at Glen Allan by year
Year	Coldest night (TNn)
1955	n/a
1956	n/a
1957	n/a
1958	-32.2 C (-26.0 F)
1959	-27.2 C (-17.0 F)
1960	-27.8 C (-18.0 F)
1961	-28.9 C (-20.0 F)
1962	-29.4 C (-20.9 F)
1963	-30.0 C (-22.0 F)
1964	-23.9 C (-11.0 F)
1965	-26.1 C (-15.0 F)
1966	-25.0 C (-13.0 F)
1967	-26.7 C (-16.1 F)
1968	-27.8 C (-18.0 F)
1969	-26.1 C (-15.0 F)
1970	-28.9 C (-20.0 F)
1971	-23.9 C (-11.0 F)
1972	-27.2 C (-17.0 F)
1973	-23.9 C (-11.0 F)
1974	-23.9 C (-11.0 F)
1975	-25.6 C (-14.1 F)
1976	-33.3 C (-27.9 F)
1977	-33.9 C (-29.0 F)
1978	-33.9 C (-29.0 F)
1979	-31.0 C (-23.8 F)
1980	-31.0 C (-23.8 F)
1981	-32.0 C (-25.6 F)
1982	-26.5 C (-15.7 F)
1983	-26.0 C (-14.8 F)

Wettest day (Rx1day)

The wettest day of the year at Glen Allan, 1955 to 1983. The record is 104.9 mm (4.1 in) in 1968, marked on the chart; the median year is 45.2 mm (1.8 in).

Wettest day (Rx1day) at Glen Allan by year
Year	Wettest day (Rx1day)
1955	34.0 mm (1.3 in)
1956	76.2 mm (3.0 in)
1957	33.8 mm (1.3 in)
1958	59.2 mm (2.3 in)
1959	42.9 mm (1.7 in)
1960	30.7 mm (1.2 in)
1961	54.4 mm (2.1 in)
1962	40.9 mm (1.6 in)
1963	30.0 mm (1.2 in)
1964	89.9 mm (3.5 in)
1965	38.4 mm (1.5 in)
1966	55.4 mm (2.2 in)
1967	51.1 mm (2.0 in)
1968	104.9 mm (4.1 in)
1969	37.1 mm (1.5 in)
1970	36.8 mm (1.4 in)
1971	45.0 mm (1.8 in)
1972	56.1 mm (2.2 in)
1973	37.8 mm (1.5 in)
1974	60.5 mm (2.4 in)
1975	99.6 mm (3.9 in)
1976	54.4 mm (2.1 in)
1977	40.9 mm (1.6 in)
1978	46.6 mm (1.8 in)
1979	45.2 mm (1.8 in)
1980	44.0 mm (1.7 in)
1981	49.8 mm (2.0 in)
1982	72.2 mm (2.8 in)
1983	38.2 mm (1.5 in)

Wettest five days (Rx5day)

The wettest five days of the year at Glen Allan, 1955 to 1983. The record is 140.0 mm (5.5 in) in 1975, marked on the chart; the median year is 76.2 mm (3.0 in).

Wettest five days (Rx5day) at Glen Allan by year
Year	Wettest five days (Rx5day)
1955	54.1 mm (2.1 in)
1956	138.7 mm (5.5 in)
1957	88.2 mm (3.5 in)
1958	76.2 mm (3.0 in)
1959	61.9 mm (2.4 in)
1960	65.5 mm (2.6 in)
1961	62.0 mm (2.4 in)
1962	65.8 mm (2.6 in)
1963	50.2 mm (2.0 in)
1964	93.2 mm (3.7 in)
1965	78.5 mm (3.1 in)
1966	84.9 mm (3.3 in)
1967	89.2 mm (3.5 in)
1968	115.1 mm (4.5 in)
1969	66.4 mm (2.6 in)
1970	48.3 mm (1.9 in)
1971	49.3 mm (1.9 in)
1972	76.7 mm (3.0 in)
1973	57.4 mm (2.3 in)
1974	91.0 mm (3.6 in)
1975	140.0 mm (5.5 in)
1976	68.3 mm (2.7 in)
1977	68.3 mm (2.7 in)
1978	93.6 mm (3.7 in)
1979	73.2 mm (2.9 in)
1980	55.4 mm (2.2 in)
1981	82.3 mm (3.2 in)
1982	84.8 mm (3.3 in)
1983	89.4 mm (3.5 in)

Longest dry spell (CDD)

The longest dry spell of the year at Glen Allan, 1955 to 1983. The record is 23 days in 1962, marked on the chart; the median year is 15 days.

Longest dry spell (CDD) at Glen Allan by year
Year	Longest dry spell (CDD)
1955	12 days
1956	19 days
1957	22 days
1958	12 days
1959	22 days
1960	21 days
1961	17 days
1962	23 days
1963	21 days
1964	13 days
1965	11 days
1966	17 days
1967	21 days
1968	13 days
1969	17 days
1970	15 days
1971	12 days
1972	14 days
1973	15 days
1974	13 days
1975	18 days
1976	12 days
1977	15 days
1978	17 days
1979	16 days
1980	11 days
1981	13 days
1982	10 days
1983	17 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

23 years with a frost

Across 23 years with a frost, the median last spring frost at Glen Allan falls on 12 May and the median first autumn frost on 7 October, which leaves a median of 148 days between them.

Frost dates and growing season at Glen Allan
Measure	Median, all years	Earliest period	Recent period (1959 to 1983)	Recent against earliest	Fitted trend
Last spring frost	12 May	n/a	12 May	n/a	n/a
First autumn frost	7 October	n/a	7 October	n/a	n/a
Growing days	148 days	n/a	148 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 Glen Allan standing records by year: CSV or JSON. Field meanings are on the data page.
Data for Glen Allan 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).