San Simon 5 NW Weather Records (USC00027563)

Record envelope, standing records and threshold days for San Simon 5 NW (USC00027563), Arizona, United States, with 52 years of record.

Key Facts for San Simon 5 NW

San Simon 5 NW (USC00027563) is a weather station in Arizona, United States at 32.33 latitude and -109.27 longitude, 1,101 m (3,612 ft) above sea level.
The station reports from 1898 to 1949, 52 years of record.
1,464 records set at San Simon 5 NW still stand.
Records are tracked for prcp: an element needs 30 years of data to be eligible.
San Simon 5 NW set a daily record precipitation of 12.7 mm (0.5 in) on 2 January 1949.

About the Station

Location: Arizona, United States, 32.33 latitude, -109.27 longitude.
Elevation: 1,101 m (3,612 ft).
Period of record: 1898 to 1949, 52 years.
Eligible elements: prcp.

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 San Simon 5 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 San Simon 5 NW, with 2026 drawn through them
Month	Highest record high	Lowest record low	2026 highest maximum	2026 lowest minimum
Jan	27.8 C (82.0 F)	-20.6 C (-5.1 F)	n/a	n/a
Feb	31.1 C (88.0 F)	-12.2 C (10.0 F)	n/a	n/a
Mar	33.3 C (91.9 F)	-12.8 C (9.0 F)	n/a	n/a
Apr	36.1 C (97.0 F)	-8.3 C (17.1 F)	n/a	n/a
May	41.7 C (107.1 F)	-1.1 C (30.0 F)	n/a	n/a
Jun	43.3 C (109.9 F)	3.3 C (37.9 F)	n/a	n/a
Jul	43.9 C (111.0 F)	8.9 C (48.0 F)	n/a	n/a
Aug	43.9 C (111.0 F)	8.3 C (46.9 F)	n/a	n/a
Sep	40.6 C (105.1 F)	3.3 C (37.9 F)	n/a	n/a
Oct	36.7 C (98.1 F)	-6.7 C (19.9 F)	n/a	n/a
Nov	31.1 C (88.0 F)	-11.7 C (10.9 F)	n/a	n/a
Dec	31.1 C (88.0 F)	-13.3 C (8.1 F)	n/a	n/a

Which Years Hold Standing Records

1,464 standing records

1,464 records at San Simon 5 NW still stand. 1907 holds the most, with 117.

Standing records at San Simon 5 NW by the year they were set
Year set	Standing records
1903	51
1904	84
1905	68
1906	101
1907	117
1908	61
1909	77
1910	116
1911	97
1912	10
1913	84
1914	34
1915	66
1916	52
1939	9
1940	36
1941	44
1942	42
1943	50
1944	41
1945	56
1946	48
1947	48
1948	63
1949	9

Wettest Day of Each Month

Mar: 101.6 mm (4.0 in)

The wettest day on record for each calendar month at San Simon 5 NW. The most was 101.6 mm (4.0 in) on 1 March 1905.

Record daily precipitation for each month at San Simon 5 NW
Month	Record daily precipitation (mm)	Date
Jan	66.8 mm (2.6 in)	19 January 1916
Feb	28.4 mm (1.1 in)	28 February 1911
Mar	101.6 mm (4.0 in)	1 March 1905
Apr	25.4 mm (1.0 in)	23 April 1908
May	19.1 mm (0.8 in)	10 May 1904
Jun	23.1 mm (0.9 in)	18 June 1933
Jul	63.5 mm (2.5 in)	22 July 1912
Aug	54.6 mm (2.1 in)	13 August 1903
Sep	33.0 mm (1.3 in)	23 September 1900
Oct	49.5 mm (1.9 in)	9 October 1945
Nov	25.4 mm (1.0 in)	12 November 1928
Dec	27.4 mm (1.1 in)	29 December 1934

Period of Record Coverage

1903 to 1949

25 years of record at San Simon 5 NW, 1903 to 1949. 9 years have data for under 90 percent of days and are left out of rankings: 1903, 1912, 1914, 1916, 1939, 1944, 1945, 1948 and others.

Days with data per year at San Simon 5 NW
Year	Days with data	Share of year	Complete
1903	301	82%	No
1904	341	93%	Yes
1905	362	99%	Yes
1906	364	100%	Yes
1907	350	96%	Yes
1908	362	99%	Yes
1909	365	100%	Yes
1910	365	100%	Yes
1911	365	100%	Yes
1912	115	31%	No
1913	357	98%	Yes
1914	215	59%	No
1915	365	100%	Yes
1916	151	41%	No
1939	37	10%	No
1940	349	95%	Yes
1941	358	98%	Yes
1942	361	99%	Yes
1943	334	92%	Yes
1944	242	66%	No
1945	313	86%	No
1946	330	90%	Yes
1947	356	98%	Yes
1948	329	90%	No
1949	26	7%	No

Latest Records

Latest records at San Simon 5 NW
Date	Station	Record	Value	Beat old record by	Old record stood	Significance
2 January 1949	San Simon 5 NW, US	daily rain	12.7 mm (0.5 in)	0.3 mm (0.01 in)	7 years	7 of 100 (Routine)
27 December 1948	San Simon 5 NW, US	daily rain	23.9 mm (0.9 in)	7.4 mm (0.29 in)	21 years	20 of 100 (Routine)
26 December 1948	San Simon 5 NW, US	daily rain	10.2 mm (0.4 in)	7.7 mm (0.30 in)	5 years	19 of 100 (Routine)
19 October 1948	San Simon 5 NW, US	daily rain	2.5 mm (0.10 in)	2.5 mm (0.10 in)	48 years	20 of 100 (Routine)
16 September 1948	San Simon 5 NW, US	daily rain (Tie)	5.6 mm (0.22 in)	tie	27 years	3 of 100 (Routine)
1 June 1948	San Simon 5 NW, US	daily rain	4.3 mm (0.17 in)	4.3 mm (0.17 in)	49 years	20 of 100 (Routine)
31 March 1948	San Simon 5 NW, US	daily rain	1.3 mm (0.05 in)	0.5 mm (0.02 in)	21 years	11 of 100 (Routine)
5 February 1948	San Simon 5 NW, US	daily rain	17.8 mm (0.7 in)	6.1 mm (0.24 in)	8 years	18 of 100 (Routine)
31 December 1947	San Simon 5 NW, US	daily rain	14.5 mm (0.6 in)	7.6 mm (0.30 in)	32 years	20 of 100 (Routine)
5 October 1947	San Simon 5 NW, US	daily rain	2.5 mm (0.10 in)	1.2 mm (0.05 in)	21 years	12 of 100 (Routine)
1 July 1947	San Simon 5 NW, US	daily rain	12.2 mm (0.5 in)	5.8 mm (0.23 in)	14 years	15 of 100 (Routine)
17 June 1947	San Simon 5 NW, US	daily rain	16.3 mm (0.6 in)	16.3 mm (0.6 in)	48 years	20 of 100 (Routine)
29 October 1946	San Simon 5 NW, US	daily rain (Tie)	4.6 mm (0.18 in)	tie	3 years	1 of 100 (Routine)
28 October 1946	San Simon 5 NW, US	daily rain	10.2 mm (0.4 in)	9.9 mm (0.39 in)	40 years	20 of 100 (Routine)
13 January 1946	San Simon 5 NW, US	daily rain	7.6 mm (0.30 in)	5.8 mm (0.23 in)	8 years	12 of 100 (Routine)
4 January 1946	San Simon 5 NW, US	daily rain	17.8 mm (0.7 in)	7.6 mm (0.30 in)	38 years	20 of 100 (Routine)
9 October 1945	San Simon 5 NW, US	monthly rain	49.5 mm (1.9 in)	20.0 mm (0.8 in)	6 years	40 of 100 (Notable)
20 August 1945	San Simon 5 NW, US	daily rain	19.1 mm (0.8 in)	5.1 mm (0.20 in)	22 years	16 of 100 (Routine)
30 July 1945	San Simon 5 NW, US	daily rain	21.6 mm (0.9 in)	2.5 mm (0.10 in)	16 years	10 of 100 (Routine)
17 July 1945	San Simon 5 NW, US	daily rain	10.2 mm (0.4 in)	4.6 mm (0.18 in)	36 years	18 of 100 (Routine)

Climate Trend

14 complete years, 1904 to 1948

One stripe for each of 14 complete years at San Simon 5 NW, 1904 to 1948. Blue stripes are years cooler than the station's own mean of 16.9 C (62.4 F); red stripes are warmer. The coolest year was 1907, at 15.7 C (60.3 F), and the warmest was 1910, at 19.0 C (66.1 F). The strongest colour marks a difference of 2.1 C (3.8 F).

Annual mean temperature at San Simon 5 NW as warming stripes, 1904 to 1948
Year	Annual mean temperature	Difference from the station mean
1904	16.9 C	+0.06 C
1905	17.1 C	+0.26 C
1906	16.6 C	-0.26 C
1907	15.7 C	-1.14 C
1908	16.8 C	-0.04 C
1909	17.7 C	+0.87 C
1910	19.0 C	+2.10 C
1911	17.1 C	+0.28 C
1915	15.8 C	-1.03 C
1940	17.4 C	+0.52 C
1941	16.4 C	-0.49 C
1942	16.7 C	-0.14 C
1947	16.4 C	-0.42 C
1948	16.3 C	-0.54 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

1898 to 1949

Yearly extremes at San Simon 5 NW: the record and the median year
Measure	Record	Year of the record	Median year	Years with a value
Hottest day (TXx)	43.9 C (111.0 F)	1905	41.1 C (106.0 F)	25
Coldest night (TNn)	-20.6 C (-5.1 F)	1913	-10.6 C (12.9 F)	25
Wettest day (Rx1day)	101.6 mm (4.0 in)	1905	27.7 mm (1.1 in)	46
Wettest five days (Rx5day)	117.3 mm (4.6 in)	1905	42.1 mm (1.7 in)	46
Longest dry spell (CDD)	181 days	1910	65 days	46

Hottest day (TXx)

The hottest day of the year at San Simon 5 NW, 1898 to 1949. The record is 43.9 C (111.0 F) in 1905, marked on the chart; the median year is 41.1 C (106.0 F).

Hottest day (TXx) at San Simon 5 NW by year
Year	Hottest day (TXx)
1898	n/a
1899	n/a
1900	n/a
1903	40.6 C (105.1 F)
1904	40.6 C (105.1 F)
1905	43.9 C (111.0 F)
1906	41.1 C (106.0 F)
1907	41.1 C (106.0 F)
1908	40.0 C (104.0 F)
1909	43.9 C (111.0 F)
1910	42.2 C (108.0 F)
1911	41.1 C (106.0 F)
1912	43.9 C (111.0 F)
1913	42.2 C (108.0 F)
1914	43.3 C (109.9 F)
1915	41.1 C (106.0 F)
1916	38.9 C (102.0 F)
1921	n/a
1922	n/a
1923	n/a
1924	n/a
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	23.9 C (75.0 F)
1940	41.7 C (107.1 F)
1941	40.0 C (104.0 F)
1942	41.1 C (106.0 F)
1943	40.6 C (105.1 F)
1944	41.1 C (106.0 F)
1945	40.6 C (105.1 F)
1946	40.0 C (104.0 F)
1947	40.0 C (104.0 F)
1948	41.7 C (107.1 F)
1949	17.8 C (64.0 F)

Coldest night (TNn)

The coldest night of the year at San Simon 5 NW, 1898 to 1949. The record is -20.6 C (-5.1 F) in 1913, marked on the chart; the median year is -10.6 C (12.9 F).

Coldest night (TNn) at San Simon 5 NW by year
Year	Coldest night (TNn)
1898	n/a
1899	n/a
1900	n/a
1903	-7.8 C (18.0 F)
1904	-12.2 C (10.0 F)
1905	-10.0 C (14.0 F)
1906	-12.8 C (9.0 F)
1907	-7.2 C (19.0 F)
1908	-6.7 C (19.9 F)
1909	-9.4 C (15.1 F)
1910	-10.6 C (12.9 F)
1911	-12.2 C (10.0 F)
1912	-9.4 C (15.1 F)
1913	-20.6 C (-5.1 F)
1914	-18.9 C (-2.0 F)
1915	-11.7 C (10.9 F)
1916	-9.4 C (15.1 F)
1921	n/a
1922	n/a
1923	n/a
1924	n/a
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	-6.1 C (21.0 F)
1940	-6.7 C (19.9 F)
1941	-8.3 C (17.1 F)
1942	-8.9 C (16.0 F)
1943	-10.0 C (14.0 F)
1944	-12.2 C (10.0 F)
1945	-10.6 C (12.9 F)
1946	-12.8 C (9.0 F)
1947	-13.3 C (8.1 F)
1948	-11.7 C (10.9 F)
1949	-13.9 C (7.0 F)

Wettest day (Rx1day)

The wettest day of the year at San Simon 5 NW, 1898 to 1949. The record is 101.6 mm (4.0 in) in 1905, marked on the chart; the median year is 27.7 mm (1.1 in).

Wettest day (Rx1day) at San Simon 5 NW by year
Year	Wettest day (Rx1day)
1898	13.0 mm (0.5 in)
1899	33.0 mm (1.3 in)
1900	33.0 mm (1.3 in)
1903	54.6 mm (2.1 in)
1904	31.2 mm (1.2 in)
1905	101.6 mm (4.0 in)
1906	24.1 mm (0.9 in)
1907	23.6 mm (0.9 in)
1908	27.9 mm (1.1 in)
1909	25.7 mm (1.0 in)
1910	15.7 mm (0.6 in)
1911	28.4 mm (1.1 in)
1912	63.5 mm (2.5 in)
1913	22.9 mm (0.9 in)
1914	43.2 mm (1.7 in)
1915	16.5 mm (0.6 in)
1916	66.8 mm (2.6 in)
1921	50.8 mm (2.0 in)
1922	20.3 mm (0.8 in)
1923	51.8 mm (2.0 in)
1924	18.3 mm (0.7 in)
1925	38.1 mm (1.5 in)
1926	22.9 mm (0.9 in)
1927	41.9 mm (1.6 in)
1928	27.9 mm (1.1 in)
1929	45.7 mm (1.8 in)
1930	18.3 mm (0.7 in)
1931	18.3 mm (0.7 in)
1932	19.3 mm (0.8 in)
1933	23.1 mm (0.9 in)
1934	27.4 mm (1.1 in)
1935	21.6 mm (0.9 in)
1936	17.3 mm (0.7 in)
1937	41.7 mm (1.6 in)
1938	27.9 mm (1.1 in)
1939	29.5 mm (1.2 in)
1940	22.6 mm (0.9 in)
1941	33.0 mm (1.3 in)
1942	26.2 mm (1.0 in)
1943	28.2 mm (1.1 in)
1944	22.6 mm (0.9 in)
1945	49.5 mm (1.9 in)
1946	20.3 mm (0.8 in)
1947	16.3 mm (0.6 in)
1948	40.6 mm (1.6 in)
1949	12.7 mm (0.5 in)

Wettest five days (Rx5day)

The wettest five days of the year at San Simon 5 NW, 1898 to 1949. The record is 117.3 mm (4.6 in) in 1905, marked on the chart; the median year is 42.1 mm (1.7 in).

Wettest five days (Rx5day) at San Simon 5 NW by year
Year	Wettest five days (Rx5day)
1898	25.7 mm (1.0 in)
1899	38.1 mm (1.5 in)
1900	64.2 mm (2.5 in)
1903	77.5 mm (3.1 in)
1904	59.4 mm (2.3 in)
1905	117.3 mm (4.6 in)
1906	38.8 mm (1.5 in)
1907	37.5 mm (1.5 in)
1908	53.3 mm (2.1 in)
1909	42.4 mm (1.7 in)
1910	19.3 mm (0.8 in)
1911	38.1 mm (1.5 in)
1912	88.4 mm (3.5 in)
1913	44.5 mm (1.8 in)
1914	63.5 mm (2.5 in)
1915	19.1 mm (0.8 in)
1916	98.0 mm (3.9 in)
1921	53.3 mm (2.1 in)
1922	20.3 mm (0.8 in)
1923	33.7 mm (1.3 in)
1924	18.8 mm (0.7 in)
1925	27.5 mm (1.1 in)
1926	57.6 mm (2.3 in)
1927	53.3 mm (2.1 in)
1928	45.5 mm (1.8 in)
1929	80.8 mm (3.2 in)
1930	41.7 mm (1.6 in)
1931	48.8 mm (1.9 in)
1932	34.8 mm (1.4 in)
1933	26.4 mm (1.0 in)
1934	32.5 mm (1.3 in)
1935	42.8 mm (1.7 in)
1936	27.4 mm (1.1 in)
1937	52.6 mm (2.1 in)
1938	35.6 mm (1.4 in)
1939	29.5 mm (1.2 in)
1940	23.8 mm (0.9 in)
1941	46.2 mm (1.8 in)
1942	49.3 mm (1.9 in)
1943	35.8 mm (1.4 in)
1944	46.5 mm (1.8 in)
1945	64.0 mm (2.5 in)
1946	31.7 mm (1.2 in)
1947	16.3 mm (0.6 in)
1948	43.2 mm (1.7 in)
1949	15.5 mm (0.6 in)

Longest dry spell (CDD)

The longest dry spell of the year at San Simon 5 NW, 1898 to 1949. The record is 181 days in 1910, marked on the chart; the median year is 65 days.

Longest dry spell (CDD) at San Simon 5 NW by year
Year	Longest dry spell (CDD)
1898	101 days
1899	88 days
1900	69 days
1903	71 days
1904	93 days
1905	47 days
1906	87 days
1907	62 days
1908	78 days
1909	67 days
1910	181 days
1911	69 days
1912	58 days
1913	86 days
1914	48 days
1915	101 days
1916	36 days
1921	52 days
1922	30 days
1923	45 days
1924	99 days
1925	50 days
1926	33 days
1927	36 days
1928	75 days
1929	62 days
1930	47 days
1931	47 days
1932	63 days
1933	48 days
1934	89 days
1935	73 days
1936	57 days
1937	71 days
1938	54 days
1939	77 days
1940	30 days
1941	40 days
1942	75 days
1943	78 days
1944	53 days
1945	137 days
1946	78 days
1947	150 days
1948	61 days
1949	7 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

33 years, 1904 to 1948

A day with at least 24.2 mm (1.0 in) of rain is expected about once in 2 years. A day with at least 95.6 mm (3.8 in) of rain is expected about once in 100 years.

Rainfall return levels at San Simon 5 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	24.2 mm (1.0 in)
5 years	34.0 mm (1.3 in)
10 years	43.1 mm (1.7 in)
25 years	59.0 mm (2.3 in)
50 years	75.0 mm (3.0 in)	Longer than the 33 years of record
100 years	95.6 mm (3.8 in)	Longer than the 33 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, 33 years of values from 1904 to 1948.

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: 101.6 mm (4.0 in) in 1905; 49.5 mm (1.9 in) in 1945; 45.7 mm (1.8 in) in 1929.

Download the Data

Data for San Simon 5 NW standing records by year: CSV or JSON. Field meanings are on the data page.
Data for San Simon 5 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).