Ruby 4 NW Weather Records (USC00027326)

Record envelope, standing records and threshold days for Ruby 4 NW (USC00027326), Arizona, United States, with 61 years of record.

Key Facts for Ruby 4 NW

Ruby 4 NW (USC00027326) is a weather station in Arizona, United States at 31.50 latitude and -111.28 longitude, 1,214 m (3,983 ft) above sea level.
The station reports from 1895 to 1955, 61 years of record.
1,464 records set at Ruby 4 NW still stand.
Records are tracked for prcp, snow, snwd: an element needs 30 years of data to be eligible.
Ruby 4 NW set a daily record precipitation of 14.0 mm (0.6 in) on 2 December 1955.

About the Station

Location: Arizona, United States, 31.50 latitude, -111.28 longitude.
Elevation: 1,214 m (3,983 ft).
Period of record: 1895 to 1955, 61 years.
Eligible elements: prcp, snow, snwd.

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 Ruby 4 NW. 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 Ruby 4 NW, with 2026 drawn through them
Month	Highest record high	Lowest record low	2026 highest maximum	2026 lowest minimum
Jan	32.2 C (90.0 F)	-11.1 C (12.0 F)	n/a	n/a
Feb	32.2 C (90.0 F)	-8.9 C (16.0 F)	n/a	n/a
Mar	34.4 C (93.9 F)	-3.9 C (25.0 F)	n/a	n/a
Apr	35.0 C (95.0 F)	-1.1 C (30.0 F)	n/a	n/a
May	39.4 C (102.9 F)	2.2 C (36.0 F)	n/a	n/a
Jun	39.4 C (102.9 F)	0.6 C (33.1 F)	n/a	n/a
Jul	39.4 C (102.9 F)	11.1 C (52.0 F)	n/a	n/a
Aug	40.6 C (105.1 F)	12.2 C (54.0 F)	n/a	n/a
Sep	36.1 C (97.0 F)	5.0 C (41.0 F)	n/a	n/a
Oct	36.7 C (98.1 F)	-0.6 C (30.9 F)	n/a	n/a
Nov	36.1 C (97.0 F)	-3.3 C (26.1 F)	n/a	n/a
Dec	35.0 C (95.0 F)	-7.8 C (18.0 F)	n/a	n/a

Which Years Hold Standing Records

1,464 standing records

1,464 records at Ruby 4 NW still stand. 1896 holds the most, with 192.

Wettest Day of Each Month

Jul: 112.5 mm (4.4 in)

The wettest day on record for each calendar month at Ruby 4 NW. The most was 112.5 mm (4.4 in) on 22 July 1941.

Record daily precipitation for each month at Ruby 4 NW
Month	Record daily precipitation (mm)	Date
Jan	63.8 mm (2.5 in)	19 January 1916
Feb	49.3 mm (1.9 in)	11 February 1931
Mar	42.2 mm (1.7 in)	17 March 1930
Apr	59.2 mm (2.3 in)	4 April 1899
May	21.8 mm (0.9 in)	15 May 1917
Jun	48.8 mm (1.9 in)	29 June 1931
Jul	112.5 mm (4.4 in)	22 July 1941
Aug	73.9 mm (2.9 in)	2 August 1951
Sep	35.8 mm (1.4 in)	18 September 1931
Oct	66.0 mm (2.6 in)	27 October 1944
Nov	66.8 mm (2.6 in)	21 November 1931
Dec	48.0 mm (1.9 in)	29 December 1934

Period of Record Coverage

1895 to 1944

17 years of record at Ruby 4 NW, 1895 to 1944. 4 years have data for under 90 percent of days and are left out of rankings: 1895, 1900, 1901, 1935.

Days with data per year at Ruby 4 NW
Year	Days with data	Share of year	Complete
1895	253	69%	No
1896	354	97%	Yes
1897	330	90%	Yes
1898	365	100%	Yes
1899	331	91%	Yes
1900	186	51%	No
1901	88	24%	No
1935	60	16%	No
1936	366	100%	Yes
1937	364	100%	Yes
1938	364	100%	Yes
1939	364	100%	Yes
1940	358	98%	Yes
1941	363	99%	Yes
1942	364	100%	Yes
1943	365	100%	Yes
1944	334	91%	Yes

Latest Records

Latest records at Ruby 4 NW
Date	Station	Record	Value	Beat old record by	Old record stood	Significance
2 December 1955	Ruby 4 NW, US	daily rain	14.0 mm (0.6 in)	12.2 mm (0.5 in)	8 years	20 of 100 (Routine)
26 August 1955	Ruby 4 NW, US	daily rain	47.5 mm (1.9 in)	23.1 mm (0.9 in)	20 years	32 of 100 (Routine)
21 August 1955	Ruby 4 NW, US	daily rain	24.9 mm (1.0 in)	2.0 mm (0.08 in)	17 years	12 of 100 (Routine)
17 August 1955	Ruby 4 NW, US	daily rain	42.7 mm (1.7 in)	27.0 mm (1.1 in)	9 years	31 of 100 (Routine)
13 August 1955	Ruby 4 NW, US	daily rain	30.0 mm (1.2 in)	8.2 mm (0.32 in)	16 years	17 of 100 (Routine)
31 May 1955	Ruby 4 NW, US	daily rain (Tie)	0.3 mm (0.01 in)	tie	57 years	5 of 100 (Routine)
19 January 1955	Ruby 4 NW, US	daily snowfall	1.3 cm (0.5 in)	1.3 cm (0.5 in)	58 years	20 of 100 (Routine)
17 January 1955	Ruby 4 NW, US	daily snowfall	3.8 cm (1.5 in)	2.5 cm (1.0 in)	5 years	12 of 100 (Routine)
8 January 1955	Ruby 4 NW, US	daily rain	14.0 mm (0.6 in)	1.8 mm (0.07 in)	17 years	12 of 100 (Routine)
4 January 1955	Ruby 4 NW, US	daily rain	31.8 mm (1.3 in)	8.9 mm (0.35 in)	37 years	25 of 100 (Routine)
2 October 1954	Ruby 4 NW, US	daily rain	15.7 mm (0.6 in)	13.9 mm (0.5 in)	21 years	20 of 100 (Routine)
24 September 1954	Ruby 4 NW, US	daily rain	16.8 mm (0.7 in)	0.8 mm (0.03 in)	19 years	11 of 100 (Routine)
3 September 1954	Ruby 4 NW, US	daily rain	15.7 mm (0.6 in)	6.8 mm (0.27 in)	16 years	18 of 100 (Routine)
12 August 1954	Ruby 4 NW, US	daily rain	35.3 mm (1.4 in)	4.1 mm (0.16 in)	1 year	9 of 100 (Routine)
24 July 1954	Ruby 4 NW, US	daily rain	27.7 mm (1.1 in)	4.1 mm (0.16 in)	21 years	15 of 100 (Routine)
20 May 1954	Ruby 4 NW, US	daily rain	4.3 mm (0.17 in)	3.0 mm (0.12 in)	13 years	16 of 100 (Routine)
19 May 1954	Ruby 4 NW, US	daily rain	11.4 mm (0.4 in)	8.1 mm (0.32 in)	7 years	20 of 100 (Routine)
18 May 1954	Ruby 4 NW, US	daily rain	4.8 mm (0.19 in)	2.5 mm (0.10 in)	7 years	13 of 100 (Routine)
17 May 1954	Ruby 4 NW, US	daily rain	1.3 mm (0.05 in)	1.3 mm (0.05 in)	58 years	20 of 100 (Routine)
24 March 1954	Ruby 4 NW, US	daily snowfall	2.5 cm (1.0 in)	2.5 cm (1.0 in)	57 years	20 of 100 (Routine)

Climate Trend

10 complete years, 1896 to 1943

One stripe for each of 10 complete years at Ruby 4 NW, 1896 to 1943. Blue stripes are years cooler than the station's own mean of 17.3 C (63.1 F); red stripes are warmer. The coolest year was 1941, at 16.4 C (61.5 F), and the warmest was 1896, at 19.3 C (66.8 F). The strongest colour marks a difference of 2.1 C (3.8 F).

Annual mean temperature at Ruby 4 NW as warming stripes, 1896 to 1943
Year	Annual mean temperature	Difference from the station mean
1896	19.3 C	+2.06 C
1898	17.1 C	-0.15 C
1936	17.4 C	+0.18 C
1937	16.9 C	-0.40 C
1938	16.5 C	-0.74 C
1939	17.0 C	-0.25 C
1940	17.2 C	-0.10 C
1941	16.4 C	-0.87 C
1942	17.0 C	-0.23 C
1943	17.7 C	+0.46 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

1895 to 1955

Yearly extremes at Ruby 4 NW: 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)	1944	37.8 C (100.0 F)	17
Coldest night (TNn)	-11.1 C (12.0 F)	1898	-5.0 C (23.0 F)	17
Wettest day (Rx1day)	112.5 mm (4.4 in)	1941	40.8 mm (1.6 in)	36
Wettest five days (Rx5day)	130.8 mm (5.1 in)	1931	63.0 mm (2.5 in)	36
Longest dry spell (CDD)	135 days	1955	65 days	36

Hottest day (TXx)

The hottest day of the year at Ruby 4 NW, 1895 to 1955. The record is 40.6 C (105.1 F) in 1944, marked on the chart; the median year is 37.8 C (100.0 F).

Hottest day (TXx) at Ruby 4 NW by year
Year	Hottest day (TXx)
1895	38.9 C (102.0 F)
1896	39.4 C (102.9 F)
1897	38.9 C (102.0 F)
1898	38.9 C (102.0 F)
1899	37.8 C (100.0 F)
1900	34.4 C (93.9 F)
1901	29.4 C (84.9 F)
1916	n/a
1917	n/a
1918	n/a
1930	n/a
1931	n/a
1932	n/a
1933	n/a
1934	n/a
1935	24.4 C (75.9 F)
1936	39.4 C (102.9 F)
1937	37.8 C (100.0 F)
1938	37.2 C (99.0 F)
1939	38.3 C (100.9 F)
1940	37.8 C (100.0 F)
1941	37.2 C (99.0 F)
1942	39.4 C (102.9 F)
1943	37.8 C (100.0 F)
1944	40.6 C (105.1 F)
1945	n/a
1946	n/a
1947	n/a
1948	n/a
1949	n/a
1950	n/a
1951	n/a
1952	n/a
1953	n/a
1954	n/a
1955	n/a

Coldest night (TNn)

The coldest night of the year at Ruby 4 NW, 1895 to 1955. The record is -11.1 C (12.0 F) in 1898, marked on the chart; the median year is -5.0 C (23.0 F).

Coldest night (TNn) at Ruby 4 NW by year
Year	Coldest night (TNn)
1895	-4.4 C (24.1 F)
1896	-1.7 C (28.9 F)
1897	-7.8 C (18.0 F)
1898	-11.1 C (12.0 F)
1899	-6.7 C (19.9 F)
1900	-3.3 C (26.1 F)
1901	-3.9 C (25.0 F)
1916	n/a
1917	n/a
1918	n/a
1930	n/a
1931	n/a
1932	n/a
1933	n/a
1934	n/a
1935	-3.3 C (26.1 F)
1936	-4.4 C (24.1 F)
1937	-10.6 C (12.9 F)
1938	-5.6 C (21.9 F)
1939	-8.9 C (16.0 F)
1940	-3.3 C (26.1 F)
1941	-6.1 C (21.0 F)
1942	-5.0 C (23.0 F)
1943	-3.3 C (26.1 F)
1944	-6.1 C (21.0 F)
1945	n/a
1946	n/a
1947	n/a
1948	n/a
1949	n/a
1950	n/a
1951	n/a
1952	n/a
1953	n/a
1954	n/a
1955	n/a

Wettest day (Rx1day)

The wettest day of the year at Ruby 4 NW, 1895 to 1955. The record is 112.5 mm (4.4 in) in 1941, marked on the chart; the median year is 40.8 mm (1.6 in).

Wettest day (Rx1day) at Ruby 4 NW by year
Year	Wettest day (Rx1day)
1895	23.9 mm (0.9 in)
1896	45.5 mm (1.8 in)
1897	52.6 mm (2.1 in)
1898	33.3 mm (1.3 in)
1899	59.2 mm (2.3 in)
1900	18.0 mm (0.7 in)
1901	23.1 mm (0.9 in)
1916	63.8 mm (2.5 in)
1917	37.3 mm (1.5 in)
1918	41.7 mm (1.6 in)
1930	55.1 mm (2.2 in)
1931	66.8 mm (2.6 in)
1932	82.0 mm (3.2 in)
1933	50.5 mm (2.0 in)
1934	48.0 mm (1.9 in)
1935	43.7 mm (1.7 in)
1936	37.8 mm (1.5 in)
1937	36.1 mm (1.4 in)
1938	41.9 mm (1.6 in)
1939	31.0 mm (1.2 in)
1940	53.8 mm (2.1 in)
1941	112.5 mm (4.4 in)
1942	34.8 mm (1.4 in)
1943	31.8 mm (1.3 in)
1944	66.0 mm (2.6 in)
1945	39.6 mm (1.6 in)
1946	25.9 mm (1.0 in)
1947	35.8 mm (1.4 in)
1948	30.0 mm (1.2 in)
1949	39.9 mm (1.6 in)
1950	43.9 mm (1.7 in)
1951	73.9 mm (2.9 in)
1952	39.1 mm (1.5 in)
1953	21.8 mm (0.9 in)
1954	35.3 mm (1.4 in)
1955	47.5 mm (1.9 in)

Wettest five days (Rx5day)

The wettest five days of the year at Ruby 4 NW, 1895 to 1955. The record is 130.8 mm (5.1 in) in 1931, marked on the chart; the median year is 63.0 mm (2.5 in).

Wettest five days (Rx5day) at Ruby 4 NW by year
Year	Wettest five days (Rx5day)
1895	51.0 mm (2.0 in)
1896	73.0 mm (2.9 in)
1897	64.8 mm (2.6 in)
1898	75.4 mm (3.0 in)
1899	59.2 mm (2.3 in)
1900	46.2 mm (1.8 in)
1901	28.8 mm (1.1 in)
1916	107.5 mm (4.2 in)
1917	62.2 mm (2.4 in)
1918	41.7 mm (1.6 in)
1930	84.7 mm (3.3 in)
1931	130.8 mm (5.1 in)
1932	89.4 mm (3.5 in)
1933	58.0 mm (2.3 in)
1934	81.6 mm (3.2 in)
1935	80.7 mm (3.2 in)
1936	61.5 mm (2.4 in)
1937	48.0 mm (1.9 in)
1938	63.8 mm (2.5 in)
1939	60.5 mm (2.4 in)
1940	89.9 mm (3.5 in)
1941	126.7 mm (5.0 in)
1942	40.4 mm (1.6 in)
1943	44.0 mm (1.7 in)
1944	103.9 mm (4.1 in)
1945	53.3 mm (2.1 in)
1946	57.2 mm (2.3 in)
1947	54.8 mm (2.2 in)
1948	43.5 mm (1.7 in)
1949	59.6 mm (2.3 in)
1950	86.6 mm (3.4 in)
1951	105.9 mm (4.2 in)
1952	64.8 mm (2.6 in)
1953	55.6 mm (2.2 in)
1954	80.1 mm (3.2 in)
1955	76.2 mm (3.0 in)

Longest dry spell (CDD)

The longest dry spell of the year at Ruby 4 NW, 1895 to 1955. The record is 135 days in 1955, marked on the chart; the median year is 65 days.

Longest dry spell (CDD) at Ruby 4 NW by year
Year	Longest dry spell (CDD)
1895	99 days
1896	52 days
1897	37 days
1898	71 days
1899	58 days
1900	41 days
1901	22 days
1916	73 days
1917	71 days
1918	41 days
1930	65 days
1931	56 days
1932	67 days
1933	64 days
1934	54 days
1935	39 days
1936	88 days
1937	70 days
1938	55 days
1939	81 days
1940	43 days
1941	64 days
1942	66 days
1943	113 days
1944	49 days
1945	83 days
1946	67 days
1947	56 days
1948	79 days
1949	61 days
1950	113 days
1951	65 days
1952	36 days
1953	63 days
1954	84 days
1955	135 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.

Rainfall Return Levels

31 years, 1896 to 1955

A day with at least 42.2 mm (1.7 in) of rain is expected about once in 2 years. A day with at least 122.0 mm (4.8 in) of rain is expected about once in 100 years.

Rainfall return levels at Ruby 4 NW: the daily rain expected about once in a given number of years
Expected about once in	A day with at least	Note
2 years	42.2 mm (1.7 in)
5 years	57.7 mm (2.3 in)
10 years	69.9 mm (2.8 in)
25 years	88.1 mm (3.5 in)
50 years	104.0 mm (4.1 in)	Longer than the 31 years of record
100 years	122.0 mm (4.8 in)	Longer than the 31 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, 31 years of values from 1896 to 1955.

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: 112.5 mm (4.4 in) in 1941; 82.0 mm (3.2 in) in 1932; 73.9 mm (2.9 in) in 1951.

Download the Data

Data for Ruby 4 NW standing records by year: CSV or JSON. Field meanings are on the data page.
Data for Ruby 4 NW 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).