May Lo Weather Records (CA003064300)

Record envelope, standing records and threshold days for May Lo (CA003064300), Alberta, Canada, with 55 years of record.

Key Facts for May Lo

May Lo (CA003064300) is a weather station in Alberta, Canada at 55.62 latitude and -112.35 longitude, 896 m (2,940 ft) above sea level.
The station reports from 1957 to 2011, 55 years of record.
820 records set at May Lo still stand.
Records are tracked for no element yet: an element needs 30 years of data to be eligible.

About the Station

Location: Alberta, Canada, 55.62 latitude, -112.35 longitude.
Elevation: 896 m (2,940 ft).
Period of record: 1957 to 2011, 55 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 May Lo. 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 May Lo, with 2026 drawn through them
Month	Highest record high	Lowest record low	2026 highest maximum	2026 lowest minimum
Jan	n/a	n/a	n/a	n/a
Feb	n/a	n/a	n/a	n/a
Mar	n/a	n/a	n/a	n/a
Apr	27.0 C (80.6 F)	-20.0 C (-4.0 F)	n/a	n/a
May	27.8 C (82.0 F)	-11.0 C (12.2 F)	n/a	n/a
Jun	30.6 C (87.1 F)	-2.2 C (28.0 F)	n/a	n/a
Jul	30.0 C (86.0 F)	2.0 C (35.6 F)	n/a	n/a
Aug	33.0 C (91.4 F)	-4.0 C (24.8 F)	n/a	n/a
Sep	28.0 C (82.4 F)	-11.7 C (10.9 F)	n/a	n/a
Oct	21.1 C (70.0 F)	-12.8 C (9.0 F)	n/a	n/a
Nov	n/a	n/a	n/a	n/a
Dec	n/a	n/a	n/a	n/a

Which Years Hold Standing Records

820 standing records

820 records at May Lo still stand. 1981 holds the most, with 83.

Wettest Day of Each Month

Jun: 101.6 mm (4.0 in)

The wettest day on record for each calendar month at May Lo. The most was 101.6 mm (4.0 in) on 28 June 1970.

Record daily precipitation for each month at May Lo
Month	Record daily precipitation (mm)	Date
Apr	21.6 mm (0.9 in)	24 April 1981
May	38.4 mm (1.5 in)	21 May 1966
Jun	101.6 mm (4.0 in)	28 June 1970
Jul	79.4 mm (3.1 in)	21 July 1983
Aug	89.3 mm (3.5 in)	3 August 1980
Sep	62.5 mm (2.5 in)	4 September 1960
Oct	21.1 mm (0.8 in)	5 October 1957

Period of Record Coverage

1965 to 1983

19 years of record at May Lo, 1965 to 1983. 19 years have data for under 90 percent of days and are left out of rankings: 1965, 1966, 1967, 1968, 1969, 1970, 1971, 1972 and others.

Days with data per year at May Lo
Year	Days with data	Share of year	Complete
1965	181	50%	No
1966	167	46%	No
1967	162	44%	No
1968	173	47%	No
1969	176	48%	No
1970	135	37%	No
1971	149	41%	No
1972	142	39%	No
1973	177	48%	No
1974	139	38%	No
1975	167	46%	No
1976	167	46%	No
1977	177	48%	No
1978	177	48%	No
1979	167	46%	No
1980	168	46%	No
1981	177	48%	No
1982	168	46%	No
1983	149	41%	No

Latest Records

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

Extremes by Year

1957 to 1983

Yearly extremes at May Lo: the record and the median year
Measure	Record	Year of the record	Median year	Years with a value
Hottest day (TXx)	33.0 C (91.4 F)	1981	28.3 C (82.9 F)	19
Coldest night (TNn)	-20.0 C (-4.0 F)	1981	-7.8 C (18.0 F)	19
Wettest day (Rx1day)	101.6 mm (4.0 in)	1970	48.3 mm (1.9 in)	27
Wettest five days (Rx5day)	236.7 mm (9.3 in)	1970	87.9 mm (3.5 in)	27
Longest dry spell (CDD)	24 days	1981	14 days	27

Hottest day (TXx)

The hottest day of the year at May Lo, 1957 to 1983. The record is 33.0 C (91.4 F) in 1981, marked on the chart; the median year is 28.3 C (82.9 F).

Hottest day (TXx) at May Lo by year
Year	Hottest day (TXx)
1957	n/a
1958	n/a
1959	n/a
1960	n/a
1961	n/a
1962	n/a
1963	n/a
1964	n/a
1965	28.9 C (84.0 F)
1966	26.7 C (80.1 F)
1967	28.3 C (82.9 F)
1968	27.2 C (81.0 F)
1969	28.9 C (84.0 F)
1970	30.6 C (87.1 F)
1971	27.8 C (82.0 F)
1972	26.7 C (80.1 F)
1973	28.3 C (82.9 F)
1974	27.2 C (81.0 F)
1975	29.4 C (84.9 F)
1976	27.0 C (80.6 F)
1977	28.0 C (82.4 F)
1978	29.0 C (84.2 F)
1979	30.0 C (86.0 F)
1980	27.0 C (80.6 F)
1981	33.0 C (91.4 F)
1982	28.0 C (82.4 F)
1983	29.0 C (84.2 F)

Coldest night (TNn)

The coldest night of the year at May Lo, 1957 to 1983. The record is -20.0 C (-4.0 F) in 1981, marked on the chart; the median year is -7.8 C (18.0 F).

Coldest night (TNn) at May Lo by year
Year	Coldest night (TNn)
1957	n/a
1958	n/a
1959	n/a
1960	n/a
1961	n/a
1962	n/a
1963	n/a
1964	n/a
1965	-10.6 C (12.9 F)
1966	-8.9 C (16.0 F)
1967	-7.8 C (18.0 F)
1968	-10.0 C (14.0 F)
1969	-6.1 C (21.0 F)
1970	-4.4 C (24.1 F)
1971	-5.6 C (21.9 F)
1972	-7.2 C (19.0 F)
1973	-7.2 C (19.0 F)
1974	-12.8 C (9.0 F)
1975	-3.3 C (26.1 F)
1976	-10.0 C (14.0 F)
1977	-11.0 C (12.2 F)
1978	-8.0 C (17.6 F)
1979	-7.0 C (19.4 F)
1980	-3.0 C (26.6 F)
1981	-20.0 C (-4.0 F)
1982	-11.0 C (12.2 F)
1983	-7.0 C (19.4 F)

Wettest day (Rx1day)

The wettest day of the year at May Lo, 1957 to 1983. The record is 101.6 mm (4.0 in) in 1970, marked on the chart; the median year is 48.3 mm (1.9 in).

Wettest day (Rx1day) at May Lo by year
Year	Wettest day (Rx1day)
1957	26.2 mm (1.0 in)
1958	64.5 mm (2.5 in)
1959	48.3 mm (1.9 in)
1960	64.5 mm (2.5 in)
1961	38.9 mm (1.5 in)
1962	48.5 mm (1.9 in)
1963	35.6 mm (1.4 in)
1964	38.6 mm (1.5 in)
1965	60.7 mm (2.4 in)
1966	58.2 mm (2.3 in)
1967	47.5 mm (1.9 in)
1968	27.7 mm (1.1 in)
1969	32.0 mm (1.3 in)
1970	101.6 mm (4.0 in)
1971	52.6 mm (2.1 in)
1972	65.0 mm (2.6 in)
1973	67.6 mm (2.7 in)
1974	73.2 mm (2.9 in)
1975	44.5 mm (1.8 in)
1976	48.0 mm (1.9 in)
1977	45.6 mm (1.8 in)
1978	48.4 mm (1.9 in)
1979	43.0 mm (1.7 in)
1980	89.3 mm (3.5 in)
1981	40.3 mm (1.6 in)
1982	23.8 mm (0.9 in)
1983	79.4 mm (3.1 in)

Wettest five days (Rx5day)

The wettest five days of the year at May Lo, 1957 to 1983. The record is 236.7 mm (9.3 in) in 1970, marked on the chart; the median year is 87.9 mm (3.5 in).

Wettest five days (Rx5day) at May Lo by year
Year	Wettest five days (Rx5day)
1957	53.6 mm (2.1 in)
1958	107.9 mm (4.2 in)
1959	105.9 mm (4.2 in)
1960	118.1 mm (4.6 in)
1961	141.2 mm (5.6 in)
1962	92.9 mm (3.7 in)
1963	52.9 mm (2.1 in)
1964	87.9 mm (3.5 in)
1965	81.6 mm (3.2 in)
1966	70.7 mm (2.8 in)
1967	74.7 mm (2.9 in)
1968	54.7 mm (2.2 in)
1969	83.3 mm (3.3 in)
1970	236.7 mm (9.3 in)
1971	103.3 mm (4.1 in)
1972	81.1 mm (3.2 in)
1973	99.1 mm (3.9 in)
1974	135.4 mm (5.3 in)
1975	102.1 mm (4.0 in)
1976	95.9 mm (3.8 in)
1977	75.3 mm (3.0 in)
1978	86.6 mm (3.4 in)
1979	83.1 mm (3.3 in)
1980	143.7 mm (5.7 in)
1981	48.6 mm (1.9 in)
1982	50.4 mm (2.0 in)
1983	135.4 mm (5.3 in)

Longest dry spell (CDD)

The longest dry spell of the year at May Lo, 1957 to 1983. The record is 24 days in 1981, marked on the chart; the median year is 14 days.

Longest dry spell (CDD) at May Lo by year
Year	Longest dry spell (CDD)
1957	8 days
1958	10 days
1959	16 days
1960	11 days
1961	14 days
1962	14 days
1963	17 days
1964	11 days
1965	15 days
1966	23 days
1967	14 days
1968	18 days
1969	8 days
1970	17 days
1971	12 days
1972	16 days
1973	9 days
1974	15 days
1975	8 days
1976	20 days
1977	6 days
1978	12 days
1979	12 days
1980	16 days
1981	24 days
1982	16 days
1983	13 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 May Lo standing records by year: CSV or JSON. Field meanings are on the data page.
Data for May Lo 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 2026-10-16 (16 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).