Mt Trumbull Weather Records (USC00025744)

Record envelope, standing records and threshold days for Mt Trumbull (USC00025744), Arizona, United States, with 59 years of record.

Key Facts for Mt Trumbull

Mt Trumbull (USC00025744) is a weather station in Arizona, United States at 36.42 latitude and -113.35 longitude, 1,708 m (5,604 ft) above sea level.
The station reports from 1919 to 1977, 59 years of record.
1,460 records set at Mt Trumbull still stand.
Records are tracked for prcp, snow, snwd: an element needs 30 years of data to be eligible.
Mt Trumbull set a daily record precipitation of 20.6 mm (0.8 in) on 2 August 1977.

About the Station

Location: Arizona, United States, 36.42 latitude, -113.35 longitude.
Elevation: 1,708 m (5,604 ft).
Period of record: 1919 to 1977, 59 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 Mt Trumbull. 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 Mt Trumbull, with 2026 drawn through them
Month	Highest record high	Lowest record low	2026 highest maximum	2026 lowest minimum
Jan	18.9 C (66.0 F)	-18.3 C (-0.9 F)	n/a	n/a
Feb	22.2 C (72.0 F)	-11.1 C (12.0 F)	n/a	n/a
Mar	23.3 C (73.9 F)	-8.3 C (17.1 F)	n/a	n/a
Apr	26.7 C (80.1 F)	-9.4 C (15.1 F)	n/a	n/a
May	32.2 C (90.0 F)	-0.6 C (30.9 F)	n/a	n/a
Jun	35.6 C (96.1 F)	0.6 C (33.1 F)	n/a	n/a
Jul	36.7 C (98.1 F)	3.3 C (37.9 F)	n/a	n/a
Aug	35.0 C (95.0 F)	6.1 C (43.0 F)	n/a	n/a
Sep	33.3 C (91.9 F)	4.4 C (39.9 F)	n/a	n/a
Oct	31.1 C (88.0 F)	-6.1 C (21.0 F)	n/a	n/a
Nov	22.2 C (72.0 F)	-16.7 C (1.9 F)	n/a	n/a
Dec	21.7 C (71.1 F)	-18.9 C (-2.0 F)	n/a	n/a

Which Years Hold Standing Records

1,460 standing records

1,460 records at Mt Trumbull still stand. 1921 holds the most, with 693.

All-Time Record Progression

1 new records

1 all-time records were set at Mt Trumbull between 24 July 1955 and 24 July 1955. Each dot is a new record.

Wettest Day of Each Month

Jul: 111.0 mm (4.4 in)

The wettest day on record for each calendar month at Mt Trumbull. The most was 111.0 mm (4.4 in) on 24 July 1955.

Record daily precipitation for each month at Mt Trumbull
Month	Record daily precipitation (mm)	Date
Jan	24.4 mm (1.0 in)	27 January 1956
Feb	26.4 mm (1.0 in)	14 February 1954
Mar	37.3 mm (1.5 in)	3 March 1938
Apr	25.4 mm (1.0 in)	21 April 1925
May	30.7 mm (1.2 in)	20 May 1954
Jun	38.1 mm (1.5 in)	12 June 1927
Jul	111.0 mm (4.4 in)	24 July 1955
Aug	50.8 mm (2.0 in)	24 August 1961
Sep	52.1 mm (2.1 in)	6 September 1939
Oct	43.7 mm (1.7 in)	10 October 1960
Nov	26.7 mm (1.1 in)	13 November 1946
Dec	35.6 mm (1.4 in)	28 December 1936

Period of Record Coverage

1919 to 1922

4 years of record at Mt Trumbull, 1919 to 1922. 2 years have data for under 90 percent of days and are left out of rankings: 1919, 1922.

Latest Records

Latest records at Mt Trumbull
Date	Station	Record	Value	Beat old record by	Old record stood	Significance
2 August 1977	Mt Trumbull, US	daily rain	20.6 mm (0.8 in)	10.9 mm (0.4 in)	15 years	20 of 100 (Routine)
25 June 1977	Mt Trumbull, US	daily rain	6.4 mm (0.25 in)	3.1 mm (0.12 in)	46 years	20 of 100 (Routine)
10 May 1977	Mt Trumbull, US	daily rain	5.8 mm (0.23 in)	0.7 mm (0.03 in)	6 years	7 of 100 (Routine)
9 May 1977	Mt Trumbull, US	daily rain	7.6 mm (0.30 in)	5.6 mm (0.22 in)	31 years	20 of 100 (Routine)
26 March 1977	Mt Trumbull, US	daily rain	10.2 mm (0.4 in)	2.6 mm (0.10 in)	38 years	20 of 100 (Routine)
23 January 1977	Mt Trumbull, US	daily rain	7.1 mm (0.28 in)	3.3 mm (0.13 in)	10 years	14 of 100 (Routine)
26 September 1976	Mt Trumbull, US	daily rain	11.4 mm (0.4 in)	3.3 mm (0.13 in)	27 years	16 of 100 (Routine)
25 September 1976	Mt Trumbull, US	daily rain	27.9 mm (1.1 in)	2.0 mm (0.08 in)	33 years	15 of 100 (Routine)
29 July 1976	Mt Trumbull, US	daily rain	62.2 mm (2.4 in)	36.8 mm (1.4 in)	43 years	53 of 100 (Notable)
14 July 1976	Mt Trumbull, US	daily rain	17.8 mm (0.7 in)	2.3 mm (0.09 in)	55 years	20 of 100 (Routine)
15 April 1976	Mt Trumbull, US	daily rain	5.6 mm (0.22 in)	1.5 mm (0.06 in)	6 years	9 of 100 (Routine)
14 April 1976	Mt Trumbull, US	daily rain	12.7 mm (0.5 in)	1.8 mm (0.07 in)	37 years	19 of 100 (Routine)
13 April 1976	Mt Trumbull, US	daily rain (Tie)	6.4 mm (0.25 in)	tie	50 years	5 of 100 (Routine)
9 February 1976	Mt Trumbull, US	daily rain	23.6 mm (0.9 in)	7.1 mm (0.28 in)	44 years	20 of 100 (Routine)
28 November 1975	Mt Trumbull, US	daily rain	12.7 mm (0.5 in)	1.3 mm (0.05 in)	36 years	17 of 100 (Routine)
26 December 1974	Mt Trumbull, US	daily rain	9.1 mm (0.36 in)	3.8 mm (0.15 in)	32 years	19 of 100 (Routine)
28 October 1974	Mt Trumbull, US	daily rain	32.0 mm (1.3 in)	9.1 mm (0.36 in)	28 years	22 of 100 (Routine)
26 October 1974	Mt Trumbull, US	daily rain	13.5 mm (0.5 in)	5.9 mm (0.23 in)	23 years	17 of 100 (Routine)
22 July 1974	Mt Trumbull, US	daily rain	5.1 mm (0.20 in)	1.8 mm (0.07 in)	4 years	7 of 100 (Routine)
15 July 1974	Mt Trumbull, US	daily rain	15.5 mm (0.6 in)	0.3 mm (0.01 in)	32 years	14 of 100 (Routine)

Extremes by Year

1919 to 1977

Yearly extremes at Mt Trumbull: the record and the median year
Measure	Record	Year of the record	Median year	Years with a value
Hottest day (TXx)	36.7 C (98.1 F)	1920	29.7 C (85.5 F)	4
Coldest night (TNn)	-18.9 C (-2.0 F)	1919	-16.6 C (2.0 F)	4
Wettest day (Rx1day)	111.0 mm (4.4 in)	1955	29.2 mm (1.1 in)	57
Wettest five days (Rx5day)	111.8 mm (4.4 in)	1955	44.2 mm (1.7 in)	57
Longest dry spell (CDD)	111 days	1959	53 days	57

Hottest day (TXx)

The hottest day of the year at Mt Trumbull, 1919 to 1977. The record is 36.7 C (98.1 F) in 1920, marked on the chart; the median year is 29.7 C (85.5 F).

Hottest day (TXx) at Mt Trumbull by year
Year	Hottest day (TXx)
1919	23.3 C (73.9 F)
1920	36.7 C (98.1 F)
1921	36.1 C (97.0 F)
1922	13.9 C (57.0 F)
1925	n/a
1926	n/a
1927	n/a
1928	n/a
1929	n/a
1930	n/a
1931	n/a
1932	n/a
1933	n/a
1934	n/a
1935	n/a
1936	n/a
1937	n/a
1938	n/a
1939	n/a
1940	n/a
1941	n/a
1942	n/a
1943	n/a
1944	n/a
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
1956	n/a
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	n/a
1966	n/a
1967	n/a
1968	n/a
1969	n/a
1970	n/a
1971	n/a
1972	n/a
1973	n/a
1974	n/a
1975	n/a
1976	n/a
1977	n/a

Coldest night (TNn)

The coldest night of the year at Mt Trumbull, 1919 to 1977. The record is -18.9 C (-2.0 F) in 1919, marked on the chart; the median year is -16.6 C (2.0 F).

Coldest night (TNn) at Mt Trumbull by year
Year	Coldest night (TNn)
1919	-18.9 C (-2.0 F)
1920	-15.0 C (5.0 F)
1921	-11.7 C (10.9 F)
1922	-18.3 C (-0.9 F)
1925	n/a
1926	n/a
1927	n/a
1928	n/a
1929	n/a
1930	n/a
1931	n/a
1932	n/a
1933	n/a
1934	n/a
1935	n/a
1936	n/a
1937	n/a
1938	n/a
1939	n/a
1940	n/a
1941	n/a
1942	n/a
1943	n/a
1944	n/a
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
1956	n/a
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	n/a
1966	n/a
1967	n/a
1968	n/a
1969	n/a
1970	n/a
1971	n/a
1972	n/a
1973	n/a
1974	n/a
1975	n/a
1976	n/a
1977	n/a

Wettest day (Rx1day)

The wettest day of the year at Mt Trumbull, 1919 to 1977. The record is 111.0 mm (4.4 in) in 1955, marked on the chart; the median year is 29.2 mm (1.1 in).

Wettest day (Rx1day) at Mt Trumbull by year
Year	Wettest day (Rx1day)
1919	0.0 mm (0.00 in)
1920	26.2 mm (1.0 in)
1921	38.9 mm (1.5 in)
1922	9.1 mm (0.36 in)
1925	42.2 mm (1.7 in)
1926	43.2 mm (1.7 in)
1927	38.1 mm (1.5 in)
1928	25.9 mm (1.0 in)
1929	25.4 mm (1.0 in)
1930	29.7 mm (1.2 in)
1931	28.2 mm (1.1 in)
1932	22.9 mm (0.9 in)
1933	29.0 mm (1.1 in)
1934	18.5 mm (0.7 in)
1935	28.2 mm (1.1 in)
1936	35.6 mm (1.4 in)
1937	29.7 mm (1.2 in)
1938	37.3 mm (1.5 in)
1939	52.1 mm (2.1 in)
1940	44.7 mm (1.8 in)
1941	48.8 mm (1.9 in)
1942	23.4 mm (0.9 in)
1943	45.0 mm (1.8 in)
1944	14.0 mm (0.6 in)
1945	35.6 mm (1.4 in)
1946	26.7 mm (1.1 in)
1947	23.9 mm (0.9 in)
1948	25.4 mm (1.0 in)
1949	44.5 mm (1.8 in)
1950	46.5 mm (1.8 in)
1951	27.9 mm (1.1 in)
1952	24.6 mm (1.0 in)
1953	19.6 mm (0.8 in)
1954	30.7 mm (1.2 in)
1955	111.0 mm (4.4 in)
1956	24.4 mm (1.0 in)
1957	33.3 mm (1.3 in)
1958	26.9 mm (1.1 in)
1959	24.1 mm (0.9 in)
1960	43.7 mm (1.7 in)
1961	50.8 mm (2.0 in)
1962	32.5 mm (1.3 in)
1963	20.6 mm (0.8 in)
1964	19.1 mm (0.8 in)
1965	30.5 mm (1.2 in)
1966	25.9 mm (1.0 in)
1967	31.8 mm (1.3 in)
1968	26.7 mm (1.1 in)
1969	43.2 mm (1.7 in)
1970	23.1 mm (0.9 in)
1971	29.2 mm (1.1 in)
1972	32.3 mm (1.3 in)
1973	31.2 mm (1.2 in)
1974	32.0 mm (1.3 in)
1975	16.5 mm (0.6 in)
1976	62.2 mm (2.4 in)
1977	25.1 mm (1.0 in)

Wettest five days (Rx5day)

The wettest five days of the year at Mt Trumbull, 1919 to 1977. The record is 111.8 mm (4.4 in) in 1955, marked on the chart; the median year is 44.2 mm (1.7 in).

Wettest five days (Rx5day) at Mt Trumbull by year
Year	Wettest five days (Rx5day)
1919	0.0 mm (0.00 in)
1920	55.1 mm (2.2 in)
1921	82.2 mm (3.2 in)
1922	9.1 mm (0.36 in)
1925	88.2 mm (3.5 in)
1926	49.5 mm (1.9 in)
1927	68.3 mm (2.7 in)
1928	43.9 mm (1.7 in)
1929	34.3 mm (1.4 in)
1930	56.2 mm (2.2 in)
1931	44.2 mm (1.7 in)
1932	51.8 mm (2.0 in)
1933	46.0 mm (1.8 in)
1934	40.1 mm (1.6 in)
1935	48.2 mm (1.9 in)
1936	61.5 mm (2.4 in)
1937	59.5 mm (2.3 in)
1938	59.6 mm (2.3 in)
1939	98.2 mm (3.9 in)
1940	75.1 mm (3.0 in)
1941	67.6 mm (2.7 in)
1942	28.8 mm (1.1 in)
1943	57.2 mm (2.3 in)
1944	32.0 mm (1.3 in)
1945	43.2 mm (1.7 in)
1946	56.2 mm (2.2 in)
1947	47.5 mm (1.9 in)
1948	57.4 mm (2.3 in)
1949	53.6 mm (2.1 in)
1950	55.4 mm (2.2 in)
1951	31.4 mm (1.2 in)
1952	31.4 mm (1.2 in)
1953	38.3 mm (1.5 in)
1954	39.0 mm (1.5 in)
1955	111.8 mm (4.4 in)
1956	43.0 mm (1.7 in)
1957	42.9 mm (1.7 in)
1958	37.3 mm (1.5 in)
1959	41.7 mm (1.6 in)
1960	43.7 mm (1.7 in)
1961	66.0 mm (2.6 in)
1962	38.9 mm (1.5 in)
1963	36.0 mm (1.4 in)
1964	33.6 mm (1.3 in)
1965	37.7 mm (1.5 in)
1966	38.6 mm (1.5 in)
1967	48.0 mm (1.9 in)
1968	28.7 mm (1.1 in)
1969	43.2 mm (1.7 in)
1970	45.7 mm (1.8 in)
1971	52.8 mm (2.1 in)
1972	44.2 mm (1.7 in)
1973	41.4 mm (1.6 in)
1974	55.6 mm (2.2 in)
1975	23.1 mm (0.9 in)
1976	66.0 mm (2.6 in)
1977	27.5 mm (1.1 in)

Longest dry spell (CDD)

The longest dry spell of the year at Mt Trumbull, 1919 to 1977. The record is 111 days in 1959, marked on the chart; the median year is 53 days.

Longest dry spell (CDD) at Mt Trumbull by year
Year	Longest dry spell (CDD)
1919	24 days
1920	34 days
1921	49 days
1922	26 days
1925	41 days
1926	81 days
1927	58 days
1928	56 days
1929	76 days
1930	42 days
1931	32 days
1932	40 days
1933	55 days
1934	50 days
1935	68 days
1936	56 days
1937	56 days
1938	38 days
1939	71 days
1940	35 days
1941	38 days
1942	74 days
1943	100 days
1944	69 days
1945	43 days
1946	40 days
1947	53 days
1948	58 days
1949	37 days
1950	68 days
1951	53 days
1952	45 days
1953	45 days
1954	41 days
1955	69 days
1956	64 days
1957	36 days
1958	41 days
1959	111 days
1960	62 days
1961	104 days
1962	51 days
1963	97 days
1964	53 days
1965	32 days
1966	68 days
1967	62 days
1968	43 days
1969	30 days
1970	62 days
1971	46 days
1972	104 days
1973	61 days
1974	51 days
1975	54 days
1976	65 days
1977	45 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

46 years, 1920 to 1977

A day with at least 29.8 mm (1.2 in) of rain is expected about once in 2 years. A day with at least 93.1 mm (3.7 in) of rain is expected about once in 100 years.

Rainfall return levels at Mt Trumbull: the daily rain expected about once in a given number of years
Expected about once in	A day with at least	Note
2 years	29.8 mm (1.2 in)
5 years	41.1 mm (1.6 in)
10 years	50.4 mm (2.0 in)
25 years	64.9 mm (2.6 in)
50 years	77.9 mm (3.1 in)	Longer than the 46 years of record
100 years	93.1 mm (3.7 in)	Longer than the 46 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, 46 years of values from 1920 to 1977.

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: 111.0 mm (4.4 in) in 1955; 62.2 mm (2.4 in) in 1976; 52.1 mm (2.1 in) in 1939.

Download the Data

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

Year	Days with data	Share of year	Complete
1919	78	21%	No
1920	340	93%	Yes
1921	338	93%	Yes
1922	22	6%	No