Shamrock Weather Records (CA004027440)

Record envelope, standing records and threshold days for Shamrock (CA004027440), Saskatchewan, Canada, with 52 years of record.

Key Facts for Shamrock

Shamrock (CA004027440) is a weather station in Saskatchewan, Canada at 50.18 latitude and -106.57 longitude, 710 m (2,329 ft) above sea level.
The station reports from 1945 to 1996, 52 years of record.
1,464 records set at Shamrock still stand.
Records are tracked for prcp, snow: an element needs 30 years of data to be eligible.
Shamrock set a daily record snowfall of 4.2 cm (1.7 in) on 28 November 1983.

About the Station

Location: Saskatchewan, Canada, 50.18 latitude, -106.57 longitude.
Elevation: 710 m (2,329 ft).
Period of record: 1945 to 1996, 52 years.
Eligible elements: 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 Shamrock. 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 Shamrock, 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)	-40.6 C (-41.1 F)	n/a	n/a
Feb	11.7 C (53.1 F)	-38.9 C (-38.0 F)	n/a	n/a
Mar	21.1 C (70.0 F)	-36.7 C (-34.1 F)	n/a	n/a
Apr	31.7 C (89.1 F)	-26.7 C (-16.1 F)	n/a	n/a
May	37.8 C (100.0 F)	-9.4 C (15.1 F)	n/a	n/a
Jun	35.0 C (95.0 F)	-2.8 C (27.0 F)	n/a	n/a
Jul	38.9 C (102.0 F)	2.2 C (36.0 F)	n/a	n/a
Aug	39.0 C (102.2 F)	0.0 C (32.0 F)	n/a	n/a
Sep	37.0 C (98.6 F)	-10.0 C (14.0 F)	n/a	n/a
Oct	31.1 C (88.0 F)	-19.4 C (-2.9 F)	n/a	n/a
Nov	22.2 C (72.0 F)	-32.2 C (-26.0 F)	n/a	n/a
Dec	11.1 C (52.0 F)	-40.5 C (-40.9 F)	n/a	n/a

Which Years Hold Standing Records

1,464 standing records

1,464 records at Shamrock still stand. 1963 holds the most, with 76.

Standing records at Shamrock by the year they were set
Year set	Standing records
1956	41
1957	48
1958	47
1959	58
1960	47
1961	61
1962	61
1963	76
1964	52
1965	67
1966	69
1967	48
1968	66
1969	61
1970	32
1971	37
1972	67
1973	58
1974	40
1975	41
1976	43
1977	60
1978	30
1979	43
1980	55
1981	49
1982	46
1983	61

All-Time Record Progression

1 new records

1 all-time records were set at Shamrock between 27 September 1982 and 27 September 1982. Each dot is a new record.

Wettest Day of Each Month

Aug: 61.0 mm (2.4 in)

The wettest day on record for each calendar month at Shamrock. The most was 61.0 mm (2.4 in) on 15 August 1972.

Record daily precipitation for each month at Shamrock
Month	Record daily precipitation (mm)	Date
Jan	20.3 mm (0.8 in)	30 January 1965
Feb	17.8 mm (0.7 in)	27 February 1948
Mar	20.3 mm (0.8 in)	28 March 1977
Apr	25.9 mm (1.0 in)	13 April 1973
May	56.1 mm (2.2 in)	20 May 1974
Jun	42.2 mm (1.7 in)	29 June 1978
Jul	53.3 mm (2.1 in)	5 July 1946
Aug	61.0 mm (2.4 in)	15 August 1972
Sep	55.9 mm (2.2 in)	10 September 1978
Oct	25.7 mm (1.0 in)	2 October 1969
Nov	17.8 mm (0.7 in)	16 November 1966
Dec	20.3 mm (0.8 in)	17 December 1961

Period of Record Coverage

1956 to 1983

28 years of record at Shamrock, 1956 to 1983. 1 years have data for under 90 percent of days and are left out of rankings: 1956.

Days with data per year at Shamrock
Year	Days with data	Share of year	Complete
1956	205	56%	No
1957	357	98%	Yes
1958	350	96%	Yes
1959	365	100%	Yes
1960	366	100%	Yes
1961	365	100%	Yes
1962	352	96%	Yes
1963	356	98%	Yes
1964	366	100%	Yes
1965	365	100%	Yes
1966	363	99%	Yes
1967	365	100%	Yes
1968	366	100%	Yes
1969	365	100%	Yes
1970	365	100%	Yes
1971	362	99%	Yes
1972	366	100%	Yes
1973	361	99%	Yes
1974	363	99%	Yes
1975	362	99%	Yes
1976	359	98%	Yes
1977	361	99%	Yes
1978	365	100%	Yes
1979	355	97%	Yes
1980	359	98%	Yes
1981	341	93%	Yes
1982	355	97%	Yes
1983	348	95%	Yes

Latest Records

Latest records at Shamrock
Date	Station	Record	Value	Beat old record by	Old record stood	Significance
28 November 1983	Shamrock, CA	daily snowfall	4.2 cm (1.7 in)	0.4 cm (0.2 in)	21 years	10 of 100 (Routine)
28 November 1983	Shamrock, CA	daily rain	4.2 mm (0.17 in)	0.4 mm (0.02 in)	21 years	10 of 100 (Routine)
11 November 1983	Shamrock, CA	daily snowfall	6.8 cm (2.7 in)	3.0 cm (1.2 in)	17 years	16 of 100 (Routine)
11 November 1983	Shamrock, CA	daily rain	6.8 mm (0.27 in)	3.0 mm (0.12 in)	17 years	16 of 100 (Routine)
6 November 1983	Shamrock, CA	daily rain	4.2 mm (0.17 in)	1.7 mm (0.07 in)	25 years	14 of 100 (Routine)
30 September 1983	Shamrock, CA	daily rain (Tie)	3.8 mm (0.15 in)	tie	5 years	1 of 100 (Routine)
8 September 1983	Shamrock, CA	daily rain	12.1 mm (0.5 in)	5.5 mm (0.22 in)	12 years	12 of 100 (Routine)
12 August 1983	Shamrock, CA	daily rain	8.2 mm (0.32 in)	2.6 mm (0.10 in)	8 years	8 of 100 (Routine)
10 July 1983	Shamrock, CA	daily rain	30.4 mm (1.2 in)	3.0 mm (0.12 in)	17 years	11 of 100 (Routine)
8 July 1983	Shamrock, CA	daily rain	6.3 mm (0.25 in)	1.5 mm (0.06 in)	24 years	11 of 100 (Routine)
11 June 1983	Shamrock, CA	daily rain	10.0 mm (0.4 in)	5.7 mm (0.22 in)	25 years	17 of 100 (Routine)
12 May 1983	Shamrock, CA	monthly snowfall	15.0 cm (5.9 in)	2.3 cm (0.9 in)	4 years	18 of 100 (Routine)
12 May 1983	Shamrock, CA	daily rain	15.0 mm (0.6 in)	0.5 mm (0.02 in)	20 years	9 of 100 (Routine)
9 May 1983	Shamrock, CA	daily rain	13.0 mm (0.5 in)	0.3 mm (0.01 in)	12 years	6 of 100 (Routine)
9 April 1983	Shamrock, CA	daily snowfall	3.0 cm (1.2 in)	2.0 cm (0.8 in)	25 years	15 of 100 (Routine)
24 March 1983	Shamrock, CA	daily snowfall	4.5 cm (1.8 in)	2.0 cm (0.8 in)	12 years	11 of 100 (Routine)
24 March 1983	Shamrock, CA	daily rain	4.5 mm (0.18 in)	2.0 mm (0.08 in)	12 years	11 of 100 (Routine)
14 March 1983	Shamrock, CA	daily snowfall	13.0 cm (5.1 in)	5.4 cm (2.1 in)	34 years	28 of 100 (Routine)
14 March 1983	Shamrock, CA	daily rain	13.0 mm (0.5 in)	5.4 mm (0.21 in)	34 years	20 of 100 (Routine)
12 March 1983	Shamrock, CA	daily rain	12.0 mm (0.5 in)	9.5 mm (0.37 in)	17 years	20 of 100 (Routine)

Climate Trend

26 complete years, 1957 to 1983

One stripe for each of 26 complete years at Shamrock, 1957 to 1983. Blue stripes are years cooler than the station's own mean of 3.1 C (37.6 F); red stripes are warmer. The coolest year was 1965, at 1.7 C (35.0 F), and the warmest was 1981, at 5.8 C (42.4 F). The strongest colour marks a difference of 2.7 C (4.9 F).

Annual mean temperature at Shamrock as warming stripes, 1957 to 1983
Year	Annual mean temperature	Difference from the station mean
1957	3.2 C	+0.08 C
1959	2.8 C	-0.38 C
1960	3.3 C	+0.19 C
1961	4.1 C	+0.92 C
1962	3.6 C	+0.50 C
1963	4.2 C	+1.09 C
1964	3.4 C	+0.23 C
1965	1.7 C	-1.47 C
1966	2.3 C	-0.80 C
1967	2.9 C	-0.28 C
1968	3.6 C	+0.41 C
1969	2.3 C	-0.81 C
1970	2.3 C	-0.88 C
1971	2.8 C	-0.37 C
1972	1.8 C	-1.35 C
1973	4.1 C	+0.95 C
1974	3.0 C	-0.19 C
1975	2.3 C	-0.85 C
1976	4.2 C	+1.10 C
1977	3.9 C	+0.76 C
1978	2.3 C	-0.86 C
1979	2.5 C	-0.66 C
1980	3.7 C	+0.57 C
1981	5.8 C	+2.62 C
1982	1.8 C	-1.39 C
1983	4.0 C	+0.83 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

1945 to 1983

Yearly extremes at Shamrock: the record and the median year
Measure	Record	Year of the record	Median year	Years with a value
Hottest day (TXx)	39.0 C (102.2 F)	1983	36.7 C (98.1 F)	28
Coldest night (TNn)	-40.6 C (-41.1 F)	1972	-36.1 C (-33.0 F)	28
Wettest day (Rx1day)	61.0 mm (2.4 in)	1972	31.8 mm (1.3 in)	35
Wettest five days (Rx5day)	109.5 mm (4.3 in)	1978	48.3 mm (1.9 in)	35
Longest dry spell (CDD)	58 days	1960	33 days	35

Hottest day (TXx)

The hottest day of the year at Shamrock, 1945 to 1983. The record is 39.0 C (102.2 F) in 1983, marked on the chart; the median year is 36.7 C (98.1 F).

Hottest day (TXx) at Shamrock by year
Year	Hottest day (TXx)
1945	n/a
1946	n/a
1947	n/a
1948	n/a
1949	n/a
1950	n/a
1951	n/a
1956	35.6 C (96.1 F)
1957	37.2 C (99.0 F)
1958	37.8 C (100.0 F)
1959	38.9 C (102.0 F)
1960	36.7 C (98.1 F)
1961	38.3 C (100.9 F)
1962	32.2 C (90.0 F)
1963	36.1 C (97.0 F)
1964	35.6 C (96.1 F)
1965	34.4 C (93.9 F)
1966	36.7 C (98.1 F)
1967	36.1 C (97.0 F)
1968	35.0 C (95.0 F)
1969	37.8 C (100.0 F)
1970	37.2 C (99.0 F)
1971	37.2 C (99.0 F)
1972	36.1 C (97.0 F)
1973	37.2 C (99.0 F)
1974	34.4 C (93.9 F)
1975	37.2 C (99.0 F)
1976	36.7 C (98.1 F)
1977	33.3 C (91.9 F)
1978	36.7 C (98.1 F)
1979	35.6 C (96.1 F)
1980	37.8 C (100.0 F)
1981	36.5 C (97.7 F)
1982	32.0 C (89.6 F)
1983	39.0 C (102.2 F)

Coldest night (TNn)

The coldest night of the year at Shamrock, 1945 to 1983. The record is -40.6 C (-41.1 F) in 1972, marked on the chart; the median year is -36.1 C (-33.0 F).

Coldest night (TNn) at Shamrock by year
Year	Coldest night (TNn)
1945	n/a
1946	n/a
1947	n/a
1948	n/a
1949	n/a
1950	n/a
1951	n/a
1956	-35.6 C (-32.1 F)
1957	-35.0 C (-31.0 F)
1958	-33.9 C (-29.0 F)
1959	-36.1 C (-33.0 F)
1960	-32.2 C (-26.0 F)
1961	-36.1 C (-33.0 F)
1962	-38.9 C (-38.0 F)
1963	-34.4 C (-29.9 F)
1964	-34.4 C (-29.9 F)
1965	-35.0 C (-31.0 F)
1966	-36.7 C (-34.1 F)
1967	-36.1 C (-33.0 F)
1968	-40.0 C (-40.0 F)
1969	-37.8 C (-36.0 F)
1970	-38.3 C (-36.9 F)
1971	-35.0 C (-31.0 F)
1972	-40.6 C (-41.1 F)
1973	-32.2 C (-26.0 F)
1974	-37.2 C (-35.0 F)
1975	-33.3 C (-27.9 F)
1976	-35.0 C (-31.0 F)
1977	-40.0 C (-40.0 F)
1978	-33.3 C (-27.9 F)
1979	-36.7 C (-34.1 F)
1980	-36.7 C (-34.1 F)
1981	-30.6 C (-23.1 F)
1982	-38.0 C (-36.4 F)
1983	-40.5 C (-40.9 F)

Wettest day (Rx1day)

The wettest day of the year at Shamrock, 1945 to 1983. The record is 61.0 mm (2.4 in) in 1972, marked on the chart; the median year is 31.8 mm (1.3 in).

Wettest day (Rx1day) at Shamrock by year
Year	Wettest day (Rx1day)
1945	12.2 mm (0.5 in)
1946	53.3 mm (2.1 in)
1947	30.5 mm (1.2 in)
1948	42.4 mm (1.7 in)
1949	41.7 mm (1.6 in)
1950	23.6 mm (0.9 in)
1951	15.2 mm (0.6 in)
1956	24.6 mm (1.0 in)
1957	17.5 mm (0.7 in)
1958	29.2 mm (1.1 in)
1959	43.9 mm (1.7 in)
1960	34.5 mm (1.4 in)
1961	33.3 mm (1.3 in)
1962	51.3 mm (2.0 in)
1963	60.2 mm (2.4 in)
1964	21.3 mm (0.8 in)
1965	27.4 mm (1.1 in)
1966	31.8 mm (1.3 in)
1967	31.0 mm (1.2 in)
1968	21.3 mm (0.8 in)
1969	37.6 mm (1.5 in)
1970	36.3 mm (1.4 in)
1971	20.6 mm (0.8 in)
1972	61.0 mm (2.4 in)
1973	25.9 mm (1.0 in)
1974	56.1 mm (2.2 in)
1975	27.2 mm (1.1 in)
1976	32.0 mm (1.3 in)
1977	20.3 mm (0.8 in)
1978	55.9 mm (2.2 in)
1979	38.9 mm (1.5 in)
1980	33.8 mm (1.3 in)
1981	30.0 mm (1.2 in)
1982	37.0 mm (1.5 in)
1983	30.4 mm (1.2 in)

Wettest five days (Rx5day)

The wettest five days of the year at Shamrock, 1945 to 1983. The record is 109.5 mm (4.3 in) in 1978, marked on the chart; the median year is 48.3 mm (1.9 in).

Wettest five days (Rx5day) at Shamrock by year
Year	Wettest five days (Rx5day)
1945	12.2 mm (0.5 in)
1946	63.2 mm (2.5 in)
1947	53.3 mm (2.1 in)
1948	45.4 mm (1.8 in)
1949	48.3 mm (1.9 in)
1950	37.7 mm (1.5 in)
1951	20.4 mm (0.8 in)
1956	48.3 mm (1.9 in)
1957	26.9 mm (1.1 in)
1958	42.4 mm (1.7 in)
1959	51.7 mm (2.0 in)
1960	88.1 mm (3.5 in)
1961	35.8 mm (1.4 in)
1962	54.1 mm (2.1 in)
1963	61.2 mm (2.4 in)
1964	30.2 mm (1.2 in)
1965	42.1 mm (1.7 in)
1966	53.6 mm (2.1 in)
1967	75.9 mm (3.0 in)
1968	48.3 mm (1.9 in)
1969	66.1 mm (2.6 in)
1970	61.2 mm (2.4 in)
1971	38.6 mm (1.5 in)
1972	71.4 mm (2.8 in)
1973	33.8 mm (1.3 in)
1974	83.3 mm (3.3 in)
1975	39.7 mm (1.6 in)
1976	48.3 mm (1.9 in)
1977	43.5 mm (1.7 in)
1978	109.5 mm (4.3 in)
1979	51.3 mm (2.0 in)
1980	33.8 mm (1.3 in)
1981	63.1 mm (2.5 in)
1982	64.0 mm (2.5 in)
1983	50.0 mm (2.0 in)

Longest dry spell (CDD)

The longest dry spell of the year at Shamrock, 1945 to 1983. The record is 58 days in 1960, marked on the chart; the median year is 33 days.

Longest dry spell (CDD) at Shamrock by year
Year	Longest dry spell (CDD)
1945	19 days
1946	31 days
1947	27 days
1948	40 days
1949	44 days
1950	25 days
1951	14 days
1956	35 days
1957	22 days
1958	24 days
1959	53 days
1960	58 days
1961	32 days
1962	29 days
1963	44 days
1964	54 days
1965	33 days
1966	40 days
1967	26 days
1968	56 days
1969	42 days
1970	35 days
1971	27 days
1972	26 days
1973	33 days
1974	38 days
1975	37 days
1976	34 days
1977	38 days
1978	30 days
1979	26 days
1980	48 days
1981	26 days
1982	20 days
1983	22 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

26 years with a frost

Across 26 years with a frost, the median last spring frost at Shamrock falls on 17 May and the median first autumn frost on 15 September, which leaves a median of 119 days between them.

Fitted over all years, the growing season changes by +4.1 days per decade at this station.

Frost dates and growing season at Shamrock
Measure	Median, all years	Earliest period	Recent period (1957 to 1983)	Recent against earliest	Fitted trend
Last spring frost	17 May	n/a	17 May	n/a	-3.4 days per decade
First autumn frost	15 September	n/a	15 September	n/a	+0.6 days per decade
Growing days	119 days	n/a	119 days	n/a	+4.1 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.

Download the Data

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