Arivaca Weather Records (USC00020380)

Record envelope, standing records and threshold days for Arivaca (USC00020380), Arizona, United States, with 128 years of record.

Key Facts for Arivaca

Arivaca (USC00020380) is a weather station in Arizona, United States at 31.58 latitude and -111.32 longitude, 1,112 m (3,649 ft) above sea level.
The station reports from 1899 to 2026, 128 years of record.
1,460 records set at Arivaca still stand.
Records are tracked for prcp, snow, snwd: an element needs 30 years of data to be eligible.
Arivaca set a daily record precipitation of 16.5 mm (0.6 in) on 18 June 2026.

About the Station

Location: Arizona, United States, 31.58 latitude, -111.32 longitude.
Elevation: 1,112 m (3,649 ft).
Period of record: 1899 to 2026, 128 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 Arivaca. 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 Arivaca, 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)	-7.2 C (19.0 F)	n/a	n/a
Feb	32.2 C (90.0 F)	-6.7 C (19.9 F)	n/a	n/a
Mar	34.4 C (93.9 F)	-6.7 C (19.9 F)	n/a	n/a
Apr	33.3 C (91.9 F)	-2.8 C (27.0 F)	n/a	n/a
May	34.4 C (93.9 F)	2.2 C (36.0 F)	n/a	n/a
Jun	46.7 C (116.1 F)	6.1 C (43.0 F)	n/a	n/a
Jul	41.7 C (107.1 F)	10.6 C (51.1 F)	n/a	n/a
Aug	41.7 C (107.1 F)	11.1 C (52.0 F)	n/a	n/a
Sep	38.9 C (102.0 F)	6.7 C (44.1 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)	-5.6 C (21.9 F)	n/a	n/a
Dec	35.0 C (95.0 F)	-6.1 C (21.0 F)	n/a	n/a

Which Years Hold Standing Records

1,460 standing records

1,460 records at Arivaca still stand. 1917 holds the most, with 456.

Wettest Day of Each Month

Oct: 78.0 mm (3.1 in)

The wettest day on record for each calendar month at Arivaca. The most was 78.0 mm (3.1 in) on 9 October 1960.

Record daily precipitation for each month at Arivaca
Month	Record daily precipitation (mm)	Date
Jan	61.0 mm (2.4 in)	22 January 2010
Feb	47.0 mm (1.9 in)	4 February 1998
Mar	41.7 mm (1.6 in)	3 March 1983
Apr	40.6 mm (1.6 in)	4 April 1999
May	16.5 mm (0.6 in)	10 May 1994
Jun	57.2 mm (2.3 in)	24 June 2024
Jul	77.7 mm (3.1 in)	20 July 1998
Aug	71.1 mm (2.8 in)	2 August 2002
Sep	77.5 mm (3.1 in)	4 September 1970
Oct	78.0 mm (3.1 in)	9 October 1960
Nov	54.4 mm (2.1 in)	21 November 1963
Dec	67.8 mm (2.7 in)	5 December 1994

Period of Record Coverage

1899 to 1919

6 years of record at Arivaca, 1899 to 1919. 6 years have data for under 90 percent of days and are left out of rankings: 1899, 1900, 1901, 1917, 1918, 1919.

Latest Records

Latest records at Arivaca
Date	Station	Record	Value	Beat old record by	Old record stood	Significance
18 June 2026	Arivaca, US	daily rain	16.5 mm (0.6 in)	12.9 mm (0.5 in)	64 years	20 of 100 (Routine)
30 March 2026	Arivaca, US	daily rain	11.9 mm (0.5 in)	0.2 mm (0.01 in)	4 years	11 of 100 (Routine)
8 January 2026	Arivaca, US	daily rain	24.4 mm (1.0 in)	9.2 mm (0.36 in)	32 years	20 of 100 (Routine)
13 October 2025	Arivaca, US	daily rain	12.2 mm (0.5 in)	7.1 mm (0.28 in)	7 years	17 of 100 (Routine)
18 September 2025	Arivaca, US	daily rain	41.9 mm (1.6 in)	2.0 mm (0.08 in)	20 years	17 of 100 (Routine)
16 July 2025	Arivaca, US	daily rain	44.5 mm (1.8 in)	7.9 mm (0.31 in)	39 years	28 of 100 (Routine)
2 June 2025	Arivaca, US	daily rain	28.2 mm (1.1 in)	27.4 mm (1.1 in)	40 years	48 of 100 (Notable)
4 November 2024	Arivaca, US	daily rain	9.1 mm (0.36 in)	3.5 mm (0.14 in)	30 years	20 of 100 (Routine)
24 June 2024	Arivaca, US	monthly rain	57.2 mm (2.3 in)	5.1 mm (0.20 in)	7 years	27 of 100 (Routine)
25 March 2024	Arivaca, US	daily rain (Tie)	2.3 mm (0.09 in)	tie	41 years	5 of 100 (Routine)
29 February 2024	Arivaca, US	daily rain	7.1 mm (0.28 in)	5.1 mm (0.20 in)	20 years	20 of 100 (Routine)
11 February 2024	Arivaca, US	daily snow depth	2.5 cm (1.0 in)	2.5 cm (1.0 in)	68 years	20 of 100 (Routine)
23 January 2024	Arivaca, US	daily rain	39.6 mm (1.6 in)	31.2 mm (1.2 in)	61 years	67 of 100 (Major)
23 December 2023	Arivaca, US	daily rain	43.9 mm (1.7 in)	29.9 mm (1.2 in)	40 years	52 of 100 (Notable)
25 October 2023	Arivaca, US	daily rain	16.5 mm (0.6 in)	12.9 mm (0.5 in)	104 years	20 of 100 (Routine)
2 March 2023	Arivaca, US	daily snowfall	5.1 cm (2.0 in)	2.6 cm (1.0 in)	44 years	28 of 100 (Routine)
2 March 2023	Arivaca, US	monthly snow depth (Tie)	5.1 cm (2.0 in)	tie	105 years	12 of 100 (Routine)
2 January 2023	Arivaca, US	daily rain	25.7 mm (1.0 in)	19.6 mm (0.8 in)	96 years	64 of 100 (Major)
30 March 2022	Arivaca, US	daily rain	11.7 mm (0.5 in)	5.3 mm (0.21 in)	32 years	20 of 100 (Routine)
24 June 2021	Arivaca, US	daily rain	18.3 mm (0.7 in)	15.8 mm (0.6 in)	47 years	20 of 100 (Routine)

Extremes by Year

1899 to 2026

Yearly extremes at Arivaca: the record and the median year
Measure	Record	Year of the record	Median year	Years with a value
Hottest day (TXx)	46.7 C (116.1 F)	1917	36.7 C (98.1 F)	6
Coldest night (TNn)	-7.2 C (19.0 F)	1918	-4.7 C (23.5 F)	6
Wettest day (Rx1day)	78.0 mm (3.1 in)	1960	44.5 mm (1.8 in)	77
Wettest five days (Rx5day)	203.9 mm (8.0 in)	1983	68.3 mm (2.7 in)	77
Longest dry spell (CDD)	149 days	1972	60 days	77

Hottest day (TXx)

The hottest day of the year at Arivaca, 1899 to 2026. The record is 46.7 C (116.1 F) in 1917, marked on the chart; the median year is 36.7 C (98.1 F).

Hottest day (TXx) at Arivaca by year
Year	Hottest day (TXx)
1899	36.7 C (98.1 F)
1900	34.4 C (93.9 F)
1901	29.4 C (84.9 F)
1917	46.7 C (116.1 F)
1918	41.7 C (107.1 F)
1919	36.7 C (98.1 F)
1925	n/a
1926	n/a
1928	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
1978	n/a
1979	n/a
1980	n/a
1981	n/a
1982	n/a
1983	n/a
1984	n/a
1985	n/a
1986	n/a
1987	n/a
1988	n/a
1989	n/a
1990	n/a
1991	n/a
1992	n/a
1993	n/a
1994	n/a
1995	n/a
1996	n/a
1997	n/a
1998	n/a
1999	n/a
2000	n/a
2001	n/a
2002	n/a
2003	n/a
2004	n/a
2005	n/a
2009	n/a
2010	n/a
2011	n/a
2012	n/a
2013	n/a
2014	n/a
2015	n/a
2016	n/a
2017	n/a
2018	n/a
2019	n/a
2020	n/a
2021	n/a
2022	n/a
2023	n/a
2024	n/a
2025	n/a
2026	n/a

Coldest night (TNn)

The coldest night of the year at Arivaca, 1899 to 2026. The record is -7.2 C (19.0 F) in 1918, marked on the chart; the median year is -4.7 C (23.5 F).

Coldest night (TNn) at Arivaca by year
Year	Coldest night (TNn)
1899	-5.6 C (21.9 F)
1900	-3.3 C (26.1 F)
1901	-3.9 C (25.0 F)
1917	-6.7 C (19.9 F)
1918	-7.2 C (19.0 F)
1919	1.1 C (34.0 F)
1925	n/a
1926	n/a
1928	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
1978	n/a
1979	n/a
1980	n/a
1981	n/a
1982	n/a
1983	n/a
1984	n/a
1985	n/a
1986	n/a
1987	n/a
1988	n/a
1989	n/a
1990	n/a
1991	n/a
1992	n/a
1993	n/a
1994	n/a
1995	n/a
1996	n/a
1997	n/a
1998	n/a
1999	n/a
2000	n/a
2001	n/a
2002	n/a
2003	n/a
2004	n/a
2005	n/a
2009	n/a
2010	n/a
2011	n/a
2012	n/a
2013	n/a
2014	n/a
2015	n/a
2016	n/a
2017	n/a
2018	n/a
2019	n/a
2020	n/a
2021	n/a
2022	n/a
2023	n/a
2024	n/a
2025	n/a
2026	n/a

Wettest day (Rx1day)

The wettest day of the year at Arivaca, 1899 to 2026. The record is 78.0 mm (3.1 in) in 1960, marked on the chart; the median year is 44.5 mm (1.8 in).

Wettest day (Rx1day) at Arivaca by year
Year	Wettest day (Rx1day)
1899	16.5 mm (0.6 in)
1900	18.0 mm (0.7 in)
1901	23.1 mm (0.9 in)
1917	25.7 mm (1.0 in)
1918	50.8 mm (2.0 in)
1919	51.8 mm (2.0 in)
1925	6.4 mm (0.25 in)
1926	30.5 mm (1.2 in)
1928	30.5 mm (1.2 in)
1956	38.4 mm (1.5 in)
1957	28.4 mm (1.1 in)
1958	37.1 mm (1.5 in)
1959	46.2 mm (1.8 in)
1960	78.0 mm (3.1 in)
1961	26.9 mm (1.1 in)
1962	43.9 mm (1.7 in)
1963	54.4 mm (2.1 in)
1964	48.8 mm (1.9 in)
1965	56.4 mm (2.2 in)
1966	39.6 mm (1.6 in)
1967	54.9 mm (2.2 in)
1968	36.1 mm (1.4 in)
1969	46.5 mm (1.8 in)
1970	77.5 mm (3.1 in)
1971	46.7 mm (1.8 in)
1972	53.3 mm (2.1 in)
1973	34.3 mm (1.4 in)
1974	40.4 mm (1.6 in)
1975	41.9 mm (1.6 in)
1976	50.0 mm (2.0 in)
1977	51.3 mm (2.0 in)
1978	44.5 mm (1.8 in)
1979	71.4 mm (2.8 in)
1980	41.1 mm (1.6 in)
1981	43.2 mm (1.7 in)
1982	41.1 mm (1.6 in)
1983	64.0 mm (2.5 in)
1984	50.3 mm (2.0 in)
1985	36.6 mm (1.4 in)
1986	66.0 mm (2.6 in)
1987	55.6 mm (2.2 in)
1988	70.6 mm (2.8 in)
1989	45.2 mm (1.8 in)
1990	39.4 mm (1.6 in)
1991	37.6 mm (1.5 in)
1992	51.6 mm (2.0 in)
1993	50.8 mm (2.0 in)
1994	67.8 mm (2.7 in)
1995	34.3 mm (1.4 in)
1996	76.2 mm (3.0 in)
1997	27.9 mm (1.1 in)
1998	77.7 mm (3.1 in)
1999	40.6 mm (1.6 in)
2000	38.1 mm (1.5 in)
2001	45.2 mm (1.8 in)
2002	71.1 mm (2.8 in)
2003	38.1 mm (1.5 in)
2004	45.5 mm (1.8 in)
2005	24.9 mm (1.0 in)
2009	2.5 mm (0.10 in)
2010	61.0 mm (2.4 in)
2011	51.6 mm (2.0 in)
2012	43.2 mm (1.7 in)
2013	40.4 mm (1.6 in)
2014	76.2 mm (3.0 in)
2015	53.3 mm (2.1 in)
2016	52.1 mm (2.1 in)
2017	30.2 mm (1.2 in)
2018	62.2 mm (2.4 in)
2019	49.5 mm (1.9 in)
2020	34.0 mm (1.3 in)
2021	45.0 mm (1.8 in)
2022	33.0 mm (1.3 in)
2023	43.9 mm (1.7 in)
2024	57.2 mm (2.3 in)
2025	44.5 mm (1.8 in)
2026	31.2 mm (1.2 in)

Wettest five days (Rx5day)

The wettest five days of the year at Arivaca, 1899 to 2026. The record is 203.9 mm (8.0 in) in 1983, marked on the chart; the median year is 68.3 mm (2.7 in).

Wettest five days (Rx5day) at Arivaca by year
Year	Wettest five days (Rx5day)
1899	27.2 mm (1.1 in)
1900	46.2 mm (1.8 in)
1901	28.8 mm (1.1 in)
1917	36.1 mm (1.4 in)
1918	69.8 mm (2.7 in)
1919	77.7 mm (3.1 in)
1925	9.4 mm (0.37 in)
1926	41.4 mm (1.6 in)
1928	30.5 mm (1.2 in)
1956	57.2 mm (2.3 in)
1957	49.7 mm (2.0 in)
1958	78.6 mm (3.1 in)
1959	60.2 mm (2.4 in)
1960	89.4 mm (3.5 in)
1961	41.2 mm (1.6 in)
1962	74.1 mm (2.9 in)
1963	60.5 mm (2.4 in)
1964	96.2 mm (3.8 in)
1965	80.5 mm (3.2 in)
1966	71.8 mm (2.8 in)
1967	123.2 mm (4.9 in)
1968	76.3 mm (3.0 in)
1969	59.0 mm (2.3 in)
1970	103.6 mm (4.1 in)
1971	99.2 mm (3.9 in)
1972	78.2 mm (3.1 in)
1973	59.7 mm (2.4 in)
1974	51.4 mm (2.0 in)
1975	45.7 mm (1.8 in)
1976	80.5 mm (3.2 in)
1977	137.5 mm (5.4 in)
1978	69.2 mm (2.7 in)
1979	99.3 mm (3.9 in)
1980	68.3 mm (2.7 in)
1981	57.4 mm (2.3 in)
1982	74.1 mm (2.9 in)
1983	203.9 mm (8.0 in)
1984	107.5 mm (4.2 in)
1985	73.8 mm (2.9 in)
1986	70.6 mm (2.8 in)
1987	73.1 mm (2.9 in)
1988	115.8 mm (4.6 in)
1989	56.6 mm (2.2 in)
1990	83.6 mm (3.3 in)
1991	46.2 mm (1.8 in)
1992	77.6 mm (3.1 in)
1993	139.2 mm (5.5 in)
1994	85.3 mm (3.4 in)
1995	50.3 mm (2.0 in)
1996	77.2 mm (3.0 in)
1997	46.7 mm (1.8 in)
1998	115.8 mm (4.6 in)
1999	59.7 mm (2.4 in)
2000	98.3 mm (3.9 in)
2001	67.6 mm (2.7 in)
2002	92.5 mm (3.6 in)
2003	68.8 mm (2.7 in)
2004	63.5 mm (2.5 in)
2005	40.9 mm (1.6 in)
2009	2.5 mm (0.10 in)
2010	82.6 mm (3.3 in)
2011	83.4 mm (3.3 in)
2012	60.5 mm (2.4 in)
2013	54.1 mm (2.1 in)
2014	76.2 mm (3.0 in)
2015	68.3 mm (2.7 in)
2016	90.2 mm (3.6 in)
2017	54.5 mm (2.1 in)
2018	90.1 mm (3.5 in)
2019	59.4 mm (2.3 in)
2020	49.2 mm (1.9 in)
2021	58.1 mm (2.3 in)
2022	61.5 mm (2.4 in)
2023	44.9 mm (1.8 in)
2024	67.5 mm (2.7 in)
2025	50.9 mm (2.0 in)
2026	54.2 mm (2.1 in)

Longest dry spell (CDD)

The longest dry spell of the year at Arivaca, 1899 to 2026. The record is 149 days in 1972, marked on the chart; the median year is 60 days.

Longest dry spell (CDD) at Arivaca by year
Year	Longest dry spell (CDD)
1899	42 days
1900	41 days
1901	22 days
1917	102 days
1918	55 days
1919	27 days
1925	26 days
1926	29 days
1928	26 days
1956	86 days
1957	42 days
1958	72 days
1959	59 days
1960	101 days
1961	80 days
1962	95 days
1963	65 days
1964	82 days
1965	79 days
1966	56 days
1967	55 days
1968	83 days
1969	58 days
1970	85 days
1971	80 days
1972	149 days
1973	80 days
1974	57 days
1975	75 days
1976	40 days
1977	61 days
1978	51 days
1979	48 days
1980	92 days
1981	57 days
1982	61 days
1983	37 days
1984	89 days
1985	69 days
1986	72 days
1987	54 days
1988	69 days
1989	56 days
1990	35 days
1991	75 days
1992	79 days
1993	44 days
1994	28 days
1995	65 days
1996	90 days
1997	49 days
1998	94 days
1999	100 days
2000	80 days
2001	36 days
2002	111 days
2003	44 days
2004	98 days
2005	15 days
2009	22 days
2010	77 days
2011	86 days
2012	58 days
2013	37 days
2014	35 days
2015	42 days
2016	65 days
2017	48 days
2018	106 days
2019	60 days
2020	60 days
2021	57 days
2022	70 days
2023	114 days
2024	83 days
2025	57 days
2026	43 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

60 years, 1956 to 2025

A day with at least 46.8 mm (1.8 in) of rain is expected about once in 2 years. A day with at least 90.7 mm (3.6 in) of rain is expected about once in 100 years.

Rainfall return levels at Arivaca: the daily rain expected about once in a given number of years
Expected about once in	A day with at least	Note
2 years	46.8 mm (1.8 in)
5 years	58.8 mm (2.3 in)
10 years	66.6 mm (2.6 in)
25 years	76.4 mm (3.0 in)
50 years	83.6 mm (3.3 in)
100 years	90.7 mm (3.6 in)	Longer than the 60 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, 60 years of values from 1956 to 2025.

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: 78.0 mm (3.1 in) in 1960; 77.7 mm (3.1 in) in 1998; 77.5 mm (3.1 in) in 1970.

Download the Data

Data for Arivaca standing records by year: CSV or JSON. Field meanings are on the data page.
Data for Arivaca 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 2026-10-12. Last revised 12 October 2026 (2026-10-12).

Days with data per year at Arivaca
Year	Days with data	Share of year	Complete
1899	92	25%	No
1900	186	51%	No
1901	87	24%	No
1917	287	79%	No
1918	324	89%	No
1919	78	21%	No