Signal Weather Records (USC00027884)

Record envelope, standing records and threshold days for Signal (USC00027884), Arizona, United States, with 59 years of record.

Key Facts for Signal

Signal (USC00027884) is a weather station in Arizona, United States at 34.47 latitude and -113.63 longitude, 464 m (1,522 ft) above sea level.
The station reports from 1893 to 1951, 59 years of record.
1,464 records set at Signal still stand.
Records are tracked for no element yet: an element needs 30 years of data to be eligible.

About the Station

Location: Arizona, United States, 34.47 latitude, -113.63 longitude.
Elevation: 464 m (1,522 ft).
Period of record: 1893 to 1951, 59 years.
Eligible elements: none yet.

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 Signal. 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 Signal, with 2026 drawn through them
Month	Highest record high	Lowest record low	2026 highest maximum	2026 lowest minimum
Jan	31.1 C (88.0 F)	-12.2 C (10.0 F)	n/a	n/a
Feb	32.8 C (91.0 F)	-9.4 C (15.1 F)	n/a	n/a
Mar	37.2 C (99.0 F)	-3.9 C (25.0 F)	n/a	n/a
Apr	39.4 C (102.9 F)	-2.2 C (28.0 F)	n/a	n/a
May	44.4 C (111.9 F)	2.2 C (36.0 F)	n/a	n/a
Jun	49.4 C (120.9 F)	8.3 C (46.9 F)	n/a	n/a
Jul	48.9 C (120.0 F)	10.0 C (50.0 F)	n/a	n/a
Aug	47.8 C (118.0 F)	10.0 C (50.0 F)	n/a	n/a
Sep	46.1 C (115.0 F)	4.4 C (39.9 F)	n/a	n/a
Oct	38.3 C (100.9 F)	0.0 C (32.0 F)	n/a	n/a
Nov	34.4 C (93.9 F)	-4.4 C (24.1 F)	n/a	n/a
Dec	28.9 C (84.0 F)	-12.2 C (10.0 F)	n/a	n/a

Which Years Hold Standing Records

1,464 standing records

1,464 records at Signal still stand. 1900 holds the most, with 160.

Wettest Day of Each Month

Oct: 47.5 mm (1.9 in)

The wettest day on record for each calendar month at Signal. The most was 47.5 mm (1.9 in) on 22 October 1896.

Record daily precipitation for each month at Signal
Month	Record daily precipitation (mm)	Date
Jan	31.2 mm (1.2 in)	14 January 1897
Feb	45.5 mm (1.8 in)	10 February 1901
Mar	26.2 mm (1.0 in)	6 March 1893
Apr	12.7 mm (0.5 in)	28 April 1900
May	17.8 mm (0.7 in)	4 May 1898
Jun	28.2 mm (1.1 in)	21 June 1898
Jul	21.3 mm (0.8 in)	30 July 1904
Aug	40.6 mm (1.6 in)	31 August 1894
Sep	25.7 mm (1.0 in)	1 September 1893
Oct	47.5 mm (1.9 in)	22 October 1896
Nov	36.3 mm (1.4 in)	18 November 1893
Dec	37.1 mm (1.5 in)	29 December 1896

Period of Record Coverage

1893 to 1907

15 years of record at Signal, 1893 to 1907. 3 years have data for under 90 percent of days and are left out of rankings: 1904, 1905, 1907.

Days with data per year at Signal
Year	Days with data	Share of year	Complete
1893	365	100%	Yes
1894	365	100%	Yes
1895	365	100%	Yes
1896	366	100%	Yes
1897	364	100%	Yes
1898	365	100%	Yes
1899	364	100%	Yes
1900	360	99%	Yes
1901	354	97%	Yes
1902	359	98%	Yes
1903	340	93%	Yes
1904	234	64%	No
1905	31	8%	No
1906	354	97%	Yes
1907	61	17%	No

Latest Records

No records were set at this station in the latest data.

Climate Trend

12 complete years, 1893 to 1906

One stripe for each of 12 complete years at Signal, 1893 to 1906. Blue stripes are years cooler than the station's own mean of 19.9 C (67.8 F); red stripes are warmer. The coolest year was 1894, at 19.5 C (67.1 F), and the warmest was 1896, at 20.4 C (68.7 F). The strongest colour marks a difference of 0.6 C (1.1 F).

Annual mean temperature at Signal as warming stripes, 1893 to 1906
Year	Annual mean temperature	Difference from the station mean
1893	19.7 C	-0.16 C
1894	19.5 C	-0.38 C
1895	20.0 C	+0.17 C
1896	20.4 C	+0.54 C
1897	19.5 C	-0.34 C
1898	20.0 C	+0.11 C
1899	20.0 C	+0.16 C
1900	19.9 C	+0.05 C
1901	20.1 C	+0.20 C
1902	19.7 C	-0.20 C
1903	19.6 C	-0.28 C
1906	20.0 C	+0.17 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

1893 to 1951

Yearly extremes at Signal: the record and the median year
Measure	Record	Year of the record	Median year	Years with a value
Hottest day (TXx)	49.4 C (120.9 F)	1902	46.1 C (115.0 F)	15
Coldest night (TNn)	-12.2 C (10.0 F)	1900	-7.8 C (18.0 F)	15
Wettest day (Rx1day)	47.5 mm (1.9 in)	1896	25.1 mm (1.0 in)	19
Wettest five days (Rx5day)	75.4 mm (3.0 in)	1895	35.8 mm (1.4 in)	19
Longest dry spell (CDD)	173 days	1901	69 days	19

Hottest day (TXx)

The hottest day of the year at Signal, 1893 to 1951. The record is 49.4 C (120.9 F) in 1902, marked on the chart; the median year is 46.1 C (115.0 F).

Hottest day (TXx) at Signal by year
Year	Hottest day (TXx)
1893	42.8 C (109.0 F)
1894	43.9 C (111.0 F)
1895	45.0 C (113.0 F)
1896	48.3 C (118.9 F)
1897	44.4 C (111.9 F)
1898	45.6 C (114.1 F)
1899	47.2 C (117.0 F)
1900	48.9 C (120.0 F)
1901	48.3 C (118.9 F)
1902	49.4 C (120.9 F)
1903	47.2 C (117.0 F)
1904	47.8 C (118.0 F)
1905	20.0 C (68.0 F)
1906	43.9 C (111.0 F)
1907	46.1 C (115.0 F)
1948	n/a
1949	n/a
1950	n/a
1951	n/a

Coldest night (TNn)

The coldest night of the year at Signal, 1893 to 1951. The record is -12.2 C (10.0 F) in 1900, marked on the chart; the median year is -7.8 C (18.0 F).

Coldest night (TNn) at Signal by year
Year	Coldest night (TNn)
1893	-4.4 C (24.1 F)
1894	-6.7 C (19.9 F)
1895	-7.8 C (18.0 F)
1896	-6.7 C (19.9 F)
1897	-5.0 C (23.0 F)
1898	-6.1 C (21.0 F)
1899	-7.8 C (18.0 F)
1900	-12.2 C (10.0 F)
1901	-12.2 C (10.0 F)
1902	-9.4 C (15.1 F)
1903	-8.9 C (16.0 F)
1904	-8.9 C (16.0 F)
1905	-5.0 C (23.0 F)
1906	-7.8 C (18.0 F)
1907	-3.3 C (26.1 F)
1948	n/a
1949	n/a
1950	n/a
1951	n/a

Wettest day (Rx1day)

The wettest day of the year at Signal, 1893 to 1951. The record is 47.5 mm (1.9 in) in 1896, marked on the chart; the median year is 25.1 mm (1.0 in).

Wettest day (Rx1day) at Signal by year
Year	Wettest day (Rx1day)
1893	36.3 mm (1.4 in)
1894	40.6 mm (1.6 in)
1895	25.1 mm (1.0 in)
1896	47.5 mm (1.9 in)
1897	31.2 mm (1.2 in)
1898	34.0 mm (1.3 in)
1899	18.5 mm (0.7 in)
1900	17.0 mm (0.7 in)
1901	45.5 mm (1.8 in)
1902	27.2 mm (1.1 in)
1903	13.2 mm (0.5 in)
1904	21.3 mm (0.8 in)
1905	33.0 mm (1.3 in)
1906	25.4 mm (1.0 in)
1907	15.2 mm (0.6 in)
1948	20.6 mm (0.8 in)
1949	23.6 mm (0.9 in)
1950	11.2 mm (0.4 in)
1951	10.2 mm (0.4 in)

Wettest five days (Rx5day)

The wettest five days of the year at Signal, 1893 to 1951. The record is 75.4 mm (3.0 in) in 1895, marked on the chart; the median year is 35.8 mm (1.4 in).

Wettest five days (Rx5day) at Signal by year
Year	Wettest five days (Rx5day)
1893	38.6 mm (1.5 in)
1894	59.6 mm (2.3 in)
1895	75.4 mm (3.0 in)
1896	51.6 mm (2.0 in)
1897	73.1 mm (2.9 in)
1898	46.2 mm (1.8 in)
1899	22.1 mm (0.9 in)
1900	20.1 mm (0.8 in)
1901	68.6 mm (2.7 in)
1902	27.2 mm (1.1 in)
1903	32.3 mm (1.3 in)
1904	26.4 mm (1.0 in)
1905	47.7 mm (1.9 in)
1906	45.7 mm (1.8 in)
1907	35.8 mm (1.4 in)
1948	20.6 mm (0.8 in)
1949	31.5 mm (1.2 in)
1950	15.0 mm (0.6 in)
1951	15.3 mm (0.6 in)

Longest dry spell (CDD)

The longest dry spell of the year at Signal, 1893 to 1951. The record is 173 days in 1901, marked on the chart; the median year is 69 days.

Longest dry spell (CDD) at Signal by year
Year	Longest dry spell (CDD)
1893	67 days
1894	75 days
1895	108 days
1896	130 days
1897	68 days
1898	47 days
1899	69 days
1900	84 days
1901	173 days
1902	113 days
1903	91 days
1904	76 days
1905	18 days
1906	64 days
1907	24 days
1948	51 days
1949	64 days
1950	115 days
1951	47 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.

Download the Data

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