Naco Weather Records (CA003014760)

Record envelope, standing records and threshold days for Naco (CA003014760), Alberta, Canada, with 36 years of record.

Key Facts for Naco

Naco (CA003014760) is a weather station in Alberta, Canada at 51.72 latitude and -110.80 longitude, 732 m (2,402 ft) above sea level.
The station reports from 1930 to 1965, 36 years of record.
1,464 records set at Naco still stand.
Records are tracked for tmax, tmin, prcp, snow: an element needs 30 years of data to be eligible.
Naco set a daily record high maximum temperature of 22.8 C (73.0 F) on 21 October 1965.

About the Station

Location: Alberta, Canada, 51.72 latitude, -110.80 longitude.
Elevation: 732 m (2,402 ft).
Period of record: 1930 to 1965, 36 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 Naco. 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 Naco, with 2026 drawn through them
Month	Highest record high	Lowest record low	2026 highest maximum	2026 lowest minimum
Jan	15.6 C (60.1 F)	-47.2 C (-53.0 F)	n/a	n/a
Feb	14.4 C (57.9 F)	-50.0 C (-58.0 F)	n/a	n/a
Mar	20.6 C (69.1 F)	-38.3 C (-36.9 F)	n/a	n/a
Apr	32.2 C (90.0 F)	-33.9 C (-29.0 F)	n/a	n/a
May	35.6 C (96.1 F)	-15.0 C (5.0 F)	n/a	n/a
Jun	38.9 C (102.0 F)	-6.7 C (19.9 F)	n/a	n/a
Jul	40.6 C (105.1 F)	0.6 C (33.1 F)	n/a	n/a
Aug	39.4 C (102.9 F)	-4.4 C (24.1 F)	n/a	n/a
Sep	35.0 C (95.0 F)	-11.7 C (10.9 F)	n/a	n/a
Oct	30.0 C (86.0 F)	-25.6 C (-14.1 F)	n/a	n/a
Nov	22.2 C (72.0 F)	-35.0 C (-31.0 F)	n/a	n/a
Dec	15.0 C (59.0 F)	-43.3 C (-45.9 F)	n/a	n/a

Which Years Hold Standing Records

1,464 standing records

1,464 records at Naco still stand. 1934 holds the most, with 86.

Standing records at Naco by the year they were set
Year set	Standing records
1930	24
1931	71
1932	54
1933	61
1934	86
1935	42
1936	82
1937	43
1938	28
1939	55
1940	40
1941	30
1942	54
1943	55
1944	23
1945	27
1946	25
1947	35
1948	33
1949	45
1950	63
1951	56
1952	23
1953	31
1954	56
1955	27
1956	38
1957	27
1958	41
1959	33
1960	32
1961	47
1962	29
1963	19
1964	11
1965	18

All-Time Record Progression

2 new records

2 all-time records were set at Naco between 1 July 1960 and 14 July 1962. Each dot is a new record.

When Naco set new all-time records
Date	Kind	Detail
1960-07-01	Record daily precipitation	Record daily precipitation 61.2 mm (2.4 in)
1962-07-14	Record daily precipitation	Record daily precipitation 74.9 mm (2.9 in)

Wettest Day of Each Month

Jul: 74.9 mm (2.9 in)

The wettest day on record for each calendar month at Naco. The most was 74.9 mm (2.9 in) on 14 July 1962.

Record daily precipitation for each month at Naco
Month	Record daily precipitation (mm)	Date
Jan	20.3 mm (0.8 in)	7 January 1954
Feb	15.2 mm (0.6 in)	25 February 1951
Mar	20.3 mm (0.8 in)	29 March 1946
Apr	30.5 mm (1.2 in)	30 April 1951
May	35.6 mm (1.4 in)	20 May 1939
Jun	63.5 mm (2.5 in)	21 June 1963
Jul	74.9 mm (2.9 in)	14 July 1962
Aug	48.0 mm (1.9 in)	4 August 1965
Sep	32.5 mm (1.3 in)	21 September 1945
Oct	34.3 mm (1.4 in)	2 October 1946
Nov	12.7 mm (0.5 in)	23 November 1946
Dec	12.7 mm (0.5 in)	15 December 1946

Period of Record Coverage

1930 to 1965

36 years of record at Naco, 1930 to 1965. 4 years have data for under 90 percent of days and are left out of rankings: 1930, 1963, 1964, 1965.

Days with data per year at Naco
Year	Days with data	Share of year	Complete
1930	242	66%	No
1931	364	100%	Yes
1932	365	100%	Yes
1933	365	100%	Yes
1934	365	100%	Yes
1935	365	100%	Yes
1936	336	92%	Yes
1937	364	100%	Yes
1938	365	100%	Yes
1939	365	100%	Yes
1940	352	96%	Yes
1941	363	99%	Yes
1942	365	100%	Yes
1943	341	93%	Yes
1944	342	93%	Yes
1945	364	100%	Yes
1946	334	92%	Yes
1947	351	96%	Yes
1948	356	97%	Yes
1949	359	98%	Yes
1950	354	97%	Yes
1951	354	97%	Yes
1952	347	95%	Yes
1953	358	98%	Yes
1954	350	96%	Yes
1955	333	91%	Yes
1956	356	97%	Yes
1957	363	99%	Yes
1958	338	93%	Yes
1959	330	90%	Yes
1960	345	94%	Yes
1961	365	100%	Yes
1962	362	99%	Yes
1963	181	50%	No
1964	90	25%	No
1965	144	39%	No

Latest Records

Latest records at Naco
Date	Station	Record	Value	Beat old record by	Old record stood	Significance
21 October 1965	Naco, CA	daily high max	22.8 C (73.0 F)	2.2 C (4.0 F)	7 years	7 of 100 (Routine)
28 September 1965	Naco, CA	daily low min (Tie)	-6.7 C (19.9 F)	tie	26 years	2 of 100 (Routine)
27 September 1965	Naco, CA	daily low max	1.1 C (34.0 F)	1.1 C (2.0 F)	14 years	8 of 100 (Routine)
23 September 1965	Naco, CA	monthly low min (Tie)	-11.7 C (10.9 F)	tie	13 years	4 of 100 (Routine)
18 September 1965	Naco, CA	daily low max	6.1 C (43.0 F)	0.6 C (1.1 F)	20 years	9 of 100 (Routine)
17 September 1965	Naco, CA	daily low max	5.0 C (41.0 F)	0.6 C (1.1 F)	18 years	8 of 100 (Routine)
17 September 1965	Naco, CA	daily low min	-5.0 C (23.0 F)	0.6 C (1.1 F)	10 years	7 of 100 (Routine)
16 September 1965	Naco, CA	daily low min	-7.8 C (18.0 F)	1.1 C (2.0 F)	28 years	13 of 100 (Routine)
16 September 1965	Naco, CA	daily low max	6.7 C (44.1 F)	0.5 C (0.9 F)	18 years	8 of 100 (Routine)
15 September 1965	Naco, CA	daily low min	-6.7 C (19.9 F)	2.8 C (5.0 F)	28 years	17 of 100 (Routine)
15 September 1965	Naco, CA	daily low max	7.8 C (46.0 F)	1.6 C (2.9 F)	18 years	10 of 100 (Routine)
14 September 1965	Naco, CA	daily low max	5.6 C (42.1 F)	2.2 C (4.0 F)	23 years	12 of 100 (Routine)
12 September 1965	Naco, CA	daily low max	7.2 C (45.0 F)	3.4 C (6.1 F)	8 years	10 of 100 (Routine)
9 September 1965	Naco, CA	daily low min (Tie)	-3.9 C (25.0 F)	tie	6 years	1 of 100 (Routine)
6 September 1965	Naco, CA	daily low min	-5.6 C (21.9 F)	4.5 C (8.1 F)	28 years	21 of 100 (Routine)
29 August 1965	Naco, CA	daily low max	9.4 C (48.9 F)	2.3 C (4.1 F)	14 years	11 of 100 (Routine)
13 August 1965	Naco, CA	daily high min (Tie)	12.8 C (55.0 F)	tie	30 years	3 of 100 (Routine)
4 August 1965	Naco, CA	monthly rain	48.0 mm (1.9 in)	3.5 mm (0.14 in)	14 years	21 of 100 (Routine)
3 August 1965	Naco, CA	daily high min (Tie)	15.0 C (59.0 F)	tie	18 years	2 of 100 (Routine)
1 August 1965	Naco, CA	daily high max	33.3 C (91.9 F)	0.5 C (0.9 F)	18 years	8 of 100 (Routine)

Climate Trend

23 complete years, 1931 to 1962

One stripe for each of 23 complete years at Naco, 1931 to 1962. Blue stripes are years cooler than the station's own mean of 1.8 C (35.3 F); red stripes are warmer. The coolest year was 1950, at -0.5 C (31.1 F), and the warmest was 1931, at 4.4 C (40.0 F). The strongest colour marks a difference of 2.6 C (4.7 F).

Annual mean temperature at Naco as warming stripes, 1931 to 1962
Year	Annual mean temperature	Difference from the station mean
1931	4.4 C	+2.59 C
1932	1.6 C	-0.19 C
1933	1.7 C	-0.09 C
1934	3.5 C	+1.62 C
1935	0.4 C	-1.42 C
1937	1.5 C	-0.37 C
1938	2.8 C	+0.96 C
1939	2.8 C	+0.99 C
1940	1.5 C	-0.32 C
1941	2.7 C	+0.83 C
1942	2.3 C	+0.47 C
1945	0.8 C	-1.07 C
1949	1.9 C	+0.06 C
1950	-0.5 C	-2.34 C
1951	-0.5 C	-2.34 C
1953	3.1 C	+1.28 C
1954	1.1 C	-0.71 C
1956	0.7 C	-1.13 C
1957	1.8 C	-0.07 C
1958	2.5 C	+0.65 C
1960	2.0 C	+0.18 C
1961	2.2 C	+0.35 C
1962	1.9 C	+0.07 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

1930 to 1965

Yearly extremes at Naco: the record and the median year
Measure	Record	Year of the record	Median year	Years with a value
Hottest day (TXx)	40.6 C (105.1 F)	1941	35.6 C (96.1 F)	36
Coldest night (TNn)	-50.0 C (-58.0 F)	1936	-38.3 C (-36.9 F)	36
Wettest day (Rx1day)	74.9 mm (2.9 in)	1962	28.9 mm (1.1 in)	36
Wettest five days (Rx5day)	136.6 mm (5.4 in)	1962	42.1 mm (1.7 in)	36
Longest dry spell (CDD)	76 days	1930	33 days	36

Hottest day (TXx)

The hottest day of the year at Naco, 1930 to 1965. The record is 40.6 C (105.1 F) in 1941, marked on the chart; the median year is 35.6 C (96.1 F).

Hottest day (TXx) at Naco by year
Year	Hottest day (TXx)
1930	36.1 C (97.0 F)
1931	37.2 C (99.0 F)
1932	36.1 C (97.0 F)
1933	38.9 C (102.0 F)
1934	36.1 C (97.0 F)
1935	36.7 C (98.1 F)
1936	35.6 C (96.1 F)
1937	38.9 C (102.0 F)
1938	34.4 C (93.9 F)
1939	38.9 C (102.0 F)
1940	36.7 C (98.1 F)
1941	40.6 C (105.1 F)
1942	33.9 C (93.0 F)
1943	35.0 C (95.0 F)
1944	35.6 C (96.1 F)
1945	37.2 C (99.0 F)
1946	35.6 C (96.1 F)
1947	37.8 C (100.0 F)
1948	35.0 C (95.0 F)
1949	35.6 C (96.1 F)
1950	32.8 C (91.0 F)
1951	35.6 C (96.1 F)
1952	32.8 C (91.0 F)
1953	35.0 C (95.0 F)
1954	34.4 C (93.9 F)
1955	35.6 C (96.1 F)
1956	32.8 C (91.0 F)
1957	33.3 C (91.9 F)
1958	33.3 C (91.9 F)
1959	32.8 C (91.0 F)
1960	35.0 C (95.0 F)
1961	39.4 C (102.9 F)
1962	33.9 C (93.0 F)
1963	33.9 C (93.0 F)
1964	28.9 C (84.0 F)
1965	33.3 C (91.9 F)

Coldest night (TNn)

The coldest night of the year at Naco, 1930 to 1965. The record is -50.0 C (-58.0 F) in 1936, marked on the chart; the median year is -38.3 C (-36.9 F).

Coldest night (TNn) at Naco by year
Year	Coldest night (TNn)
1930	-21.1 C (-6.0 F)
1931	-30.0 C (-22.0 F)
1932	-41.1 C (-42.0 F)
1933	-36.1 C (-33.0 F)
1934	-38.9 C (-38.0 F)
1935	-42.8 C (-45.0 F)
1936	-50.0 C (-58.0 F)
1937	-40.6 C (-41.1 F)
1938	-43.3 C (-45.9 F)
1939	-43.3 C (-45.9 F)
1940	-37.8 C (-36.0 F)
1941	-36.7 C (-34.1 F)
1942	-42.2 C (-44.0 F)
1943	-47.2 C (-53.0 F)
1944	-38.3 C (-36.9 F)
1945	-37.2 C (-35.0 F)
1946	-37.8 C (-36.0 F)
1947	-43.3 C (-45.9 F)
1948	-35.6 C (-32.1 F)
1949	-38.9 C (-38.0 F)
1950	-43.9 C (-47.0 F)
1951	-38.3 C (-36.9 F)
1952	-37.8 C (-36.0 F)
1953	-35.0 C (-31.0 F)
1954	-43.3 C (-45.9 F)
1955	-37.2 C (-35.0 F)
1956	-41.1 C (-42.0 F)
1957	-37.8 C (-36.0 F)
1958	-37.8 C (-36.0 F)
1959	-35.0 C (-31.0 F)
1960	-37.8 C (-36.0 F)
1961	-38.3 C (-36.9 F)
1962	-43.9 C (-47.0 F)
1963	-40.0 C (-40.0 F)
1964	-31.1 C (-24.0 F)
1965	-11.7 C (10.9 F)

Wettest day (Rx1day)

The wettest day of the year at Naco, 1930 to 1965. The record is 74.9 mm (2.9 in) in 1962, marked on the chart; the median year is 28.9 mm (1.1 in).

Wettest day (Rx1day) at Naco by year
Year	Wettest day (Rx1day)
1930	30.5 mm (1.2 in)
1931	12.2 mm (0.5 in)
1932	27.2 mm (1.1 in)
1933	16.5 mm (0.6 in)
1934	16.0 mm (0.6 in)
1935	35.3 mm (1.4 in)
1936	13.5 mm (0.5 in)
1937	27.4 mm (1.1 in)
1938	28.2 mm (1.1 in)
1939	35.6 mm (1.4 in)
1940	24.1 mm (0.9 in)
1941	42.7 mm (1.7 in)
1942	24.4 mm (1.0 in)
1943	30.0 mm (1.2 in)
1944	41.9 mm (1.6 in)
1945	32.5 mm (1.3 in)
1946	34.3 mm (1.4 in)
1947	17.8 mm (0.7 in)
1948	26.9 mm (1.1 in)
1949	24.6 mm (1.0 in)
1950	56.6 mm (2.2 in)
1951	30.5 mm (1.2 in)
1952	12.2 mm (0.5 in)
1953	29.5 mm (1.2 in)
1954	32.0 mm (1.3 in)
1955	31.0 mm (1.2 in)
1956	33.0 mm (1.3 in)
1957	24.9 mm (1.0 in)
1958	17.5 mm (0.7 in)
1959	20.8 mm (0.8 in)
1960	61.2 mm (2.4 in)
1961	21.8 mm (0.9 in)
1962	74.9 mm (2.9 in)
1963	63.5 mm (2.5 in)
1964	23.1 mm (0.9 in)
1965	52.8 mm (2.1 in)

Wettest five days (Rx5day)

The wettest five days of the year at Naco, 1930 to 1965. The record is 136.6 mm (5.4 in) in 1962, marked on the chart; the median year is 42.1 mm (1.7 in).

Wettest five days (Rx5day) at Naco by year
Year	Wettest five days (Rx5day)
1930	34.8 mm (1.4 in)
1931	18.7 mm (0.7 in)
1932	38.6 mm (1.5 in)
1933	22.9 mm (0.9 in)
1934	29.2 mm (1.1 in)
1935	37.8 mm (1.5 in)
1936	14.5 mm (0.6 in)
1937	42.1 mm (1.7 in)
1938	59.9 mm (2.4 in)
1939	60.3 mm (2.4 in)
1940	58.4 mm (2.3 in)
1941	50.3 mm (2.0 in)
1942	44.8 mm (1.8 in)
1943	42.0 mm (1.7 in)
1944	71.1 mm (2.8 in)
1945	53.3 mm (2.1 in)
1946	38.9 mm (1.5 in)
1947	32.9 mm (1.3 in)
1948	35.2 mm (1.4 in)
1949	43.5 mm (1.7 in)
1950	76.9 mm (3.0 in)
1951	52.6 mm (2.1 in)
1952	24.7 mm (1.0 in)
1953	37.5 mm (1.5 in)
1954	51.7 mm (2.0 in)
1955	38.4 mm (1.5 in)
1956	56.1 mm (2.2 in)
1957	34.3 mm (1.4 in)
1958	29.5 mm (1.2 in)
1959	30.3 mm (1.2 in)
1960	74.1 mm (2.9 in)
1961	23.6 mm (0.9 in)
1962	136.6 mm (5.4 in)
1963	86.9 mm (3.4 in)
1964	51.1 mm (2.0 in)
1965	82.0 mm (3.2 in)

Longest dry spell (CDD)

The longest dry spell of the year at Naco, 1930 to 1965. The record is 76 days in 1930, marked on the chart; the median year is 33 days.

Longest dry spell (CDD) at Naco by year
Year	Longest dry spell (CDD)
1930	76 days
1931	68 days
1932	41 days
1933	33 days
1934	44 days
1935	37 days
1936	37 days
1937	46 days
1938	28 days
1939	29 days
1940	32 days
1941	27 days
1942	33 days
1943	21 days
1944	41 days
1945	31 days
1946	32 days
1947	25 days
1948	36 days
1949	31 days
1950	36 days
1951	28 days
1952	36 days
1953	35 days
1954	46 days
1955	32 days
1956	28 days
1957	39 days
1958	41 days
1959	28 days
1960	30 days
1961	29 days
1962	28 days
1963	14 days
1964	14 days
1965	35 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 Naco falls on 7 June and the median first autumn frost on 3 September, which leaves a median of 90 days between them.

Frost dates and growing season at Naco
Measure	Median, all years	Earliest period	Recent period (1931 to 1962)	Recent against earliest	Fitted trend
Last spring frost	7 June	n/a	7 June	n/a	n/a
First autumn frost	3 September	n/a	3 September	n/a	n/a
Growing days	90 days	n/a	90 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.

Rainfall Return Levels

32 years, 1931 to 1962

A day with at least 26.9 mm (1.1 in) of rain is expected about once in 2 years. A day with at least 78.9 mm (3.1 in) of rain is expected about once in 100 years.

Rainfall return levels at Naco: the daily rain expected about once in a given number of years
Expected about once in	A day with at least	Note
2 years	26.9 mm (1.1 in)
5 years	38.7 mm (1.5 in)
10 years	47.3 mm (1.9 in)
25 years	59.1 mm (2.3 in)
50 years	68.7 mm (2.7 in)	Longer than the 32 years of record
100 years	78.9 mm (3.1 in)	Longer than the 32 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, 32 years of values from 1931 to 1962.

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: 74.9 mm (2.9 in) in 1962; 61.2 mm (2.4 in) in 1960; 56.6 mm (2.2 in) in 1950.

Download the Data

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