Tanacross Weather Records (USW00026440)

Record envelope, standing records and threshold days for Tanacross (USW00026440), Alaska, United States, with 100 years of record.

Key Facts for Tanacross

Tanacross (USW00026440) is a weather station in Alaska, United States at 63.38 latitude and -143.35 longitude, 470 m (1,541 ft) above sea level.
The station reports from 1904 to 2003, 100 years of record.
1,464 records set at Tanacross still stand.
Records are tracked for no element yet: an element needs 30 years of data to be eligible.

About the Station

Location: Alaska, United States, 63.38 latitude, -143.35 longitude.
Elevation: 470 m (1,541 ft).
Period of record: 1904 to 2003, 100 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 Tanacross. 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 Tanacross, with 2026 drawn through them
Month	Highest record high	Lowest record low	2026 highest maximum	2026 lowest minimum
Jan	6.1 C (43.0 F)	-55.6 C (-68.1 F)	n/a	n/a
Feb	13.9 C (57.0 F)	-59.4 C (-74.9 F)	n/a	n/a
Mar	11.1 C (52.0 F)	-51.1 C (-60.0 F)	n/a	n/a
Apr	21.1 C (70.0 F)	-41.7 C (-43.1 F)	n/a	n/a
May	31.7 C (89.1 F)	-17.8 C (0.0 F)	n/a	n/a
Jun	32.8 C (91.0 F)	-5.0 C (23.0 F)	n/a	n/a
Jul	32.2 C (90.0 F)	-3.9 C (25.0 F)	n/a	n/a
Aug	32.2 C (90.0 F)	-6.1 C (21.0 F)	n/a	n/a
Sep	25.6 C (78.1 F)	-20.6 C (-5.1 F)	n/a	n/a
Oct	19.4 C (66.9 F)	-35.6 C (-32.1 F)	n/a	n/a
Nov	8.3 C (46.9 F)	-48.9 C (-56.0 F)	n/a	n/a
Dec	7.2 C (45.0 F)	-56.7 C (-70.1 F)	n/a	n/a

Which Years Hold Standing Records

1,464 standing records

1,464 records at Tanacross still stand. 1956 holds the most, with 87.

Standing records at Tanacross by the year they were set
Year set	Standing records
1904	42
1905	85
1906	29
1941	35
1942	67
1943	70
1944	56
1945	40
1946	36
1947	67
1948	56
1949	51
1950	43
1951	53
1952	28
1953	50
1954	43
1955	42
1956	87
1957	43
1958	49
1959	12
1960	27
1961	45
1962	53
1963	62
1964	47
1965	18
1966	4
1967	16
1999	32
2000	46
2001	7
2002	11
2003	12

Wettest Day of Each Month

Jun: 101.6 mm (4.0 in)

The wettest day on record for each calendar month at Tanacross. The most was 101.6 mm (4.0 in) on 20 June 1906.

Record daily precipitation for each month at Tanacross
Month	Record daily precipitation (mm)	Date
Jan	15.7 mm (0.6 in)	11 January 1949
Feb	7.4 mm (0.29 in)	14 February 1963
Mar	8.1 mm (0.32 in)	30 March 1942
Apr	12.7 mm (0.5 in)	4 April 1954
May	64.8 mm (2.6 in)	25 May 1999
Jun	101.6 mm (4.0 in)	20 June 1906
Jul	39.4 mm (1.6 in)	15 July 1944
Aug	53.3 mm (2.1 in)	15 August 1905
Sep	38.1 mm (1.5 in)	6 September 1905
Oct	26.9 mm (1.1 in)	31 October 2000
Nov	29.2 mm (1.1 in)	1 November 1999
Dec	25.4 mm (1.0 in)	24 December 1905

Period of Record Coverage

1904 to 2003

35 years of record at Tanacross, 1904 to 2003. 19 years have data for under 90 percent of days and are left out of rankings: 1904, 1905, 1906, 1941, 1943, 1949, 1952, 1955 and others.

Days with data per year at Tanacross
Year	Days with data	Share of year	Complete
1904	153	42%	No
1905	152	42%	No
1906	60	16%	No
1941	270	74%	No
1942	358	98%	Yes
1943	299	82%	No
1944	341	93%	Yes
1945	365	100%	Yes
1946	361	99%	Yes
1947	363	99%	Yes
1948	360	98%	Yes
1949	304	83%	No
1950	339	93%	Yes
1951	331	91%	Yes
1952	313	86%	No
1953	330	90%	Yes
1954	341	93%	Yes
1955	304	83%	No
1956	354	97%	Yes
1957	344	94%	Yes
1958	348	95%	Yes
1959	125	34%	No
1960	212	58%	No
1961	319	87%	No
1962	340	93%	Yes
1963	356	98%	Yes
1964	234	64%	No
1965	79	22%	No
1966	75	21%	No
1967	112	31%	No
1999	244	67%	No
2000	363	99%	Yes
2001	111	30%	No
2002	78	21%	No
2003	21	6%	No

Latest Records

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

Climate Trend

13 complete years, 1942 to 2000

One stripe for each of 13 complete years at Tanacross, 1942 to 2000. Blue stripes are years cooler than the station's own mean of -4.7 C (23.6 F); red stripes are warmer. The coolest year was 1956, at -7.4 C (18.6 F), and the warmest was 1962, at -3.0 C (26.5 F). The strongest colour marks a difference of 2.8 C (5.0 F).

Annual mean temperature at Tanacross as warming stripes, 1942 to 2000
Year	Annual mean temperature	Difference from the station mean
1942	-3.6 C	+1.03 C
1945	-4.8 C	-0.10 C
1946	-5.1 C	-0.41 C
1947	-4.0 C	+0.68 C
1948	-5.6 C	-0.97 C
1952	-5.2 C	-0.51 C
1953	-5.0 C	-0.39 C
1956	-7.4 C	-2.79 C
1957	-3.8 C	+0.82 C
1958	-4.8 C	-0.14 C
1962	-3.0 C	+1.61 C
1963	-4.1 C	+0.55 C
2000	-4.0 C	+0.67 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

1904 to 2003

Yearly extremes at Tanacross: the record and the median year
Measure	Record	Year of the record	Median year	Years with a value
Hottest day (TXx)	32.8 C (91.0 F)	1964	29.4 C (84.9 F)	35
Coldest night (TNn)	-59.4 C (-74.9 F)	1947	-48.9 C (-56.0 F)	35
Wettest day (Rx1day)	101.6 mm (4.0 in)	1906	20.7 mm (0.8 in)	34
Wettest five days (Rx5day)	172.7 mm (6.8 in)	1999	35.6 mm (1.4 in)	33
Longest dry spell (CDD)	126 days	2000	44 days	34

Hottest day (TXx)

The hottest day of the year at Tanacross, 1904 to 2003. The record is 32.8 C (91.0 F) in 1964, marked on the chart; the median year is 29.4 C (84.9 F).

Hottest day (TXx) at Tanacross by year
Year	Hottest day (TXx)
1904	26.1 C (79.0 F)
1905	32.2 C (90.0 F)
1906	31.7 C (89.1 F)
1941	27.8 C (82.0 F)
1942	29.4 C (84.9 F)
1943	26.1 C (79.0 F)
1944	28.3 C (82.9 F)
1945	26.1 C (79.0 F)
1946	28.9 C (84.0 F)
1947	31.7 C (89.1 F)
1948	31.1 C (88.0 F)
1949	29.4 C (84.9 F)
1950	32.2 C (90.0 F)
1951	31.1 C (88.0 F)
1952	27.8 C (82.0 F)
1953	30.0 C (86.0 F)
1954	28.3 C (82.9 F)
1955	32.2 C (90.0 F)
1956	27.8 C (82.0 F)
1957	30.0 C (86.0 F)
1958	31.7 C (89.1 F)
1959	10.6 C (51.1 F)
1960	30.0 C (86.0 F)
1961	27.2 C (81.0 F)
1962	32.2 C (90.0 F)
1963	29.4 C (84.9 F)
1964	32.8 C (91.0 F)
1965	0.0 C (32.0 F)
1966	26.7 C (80.1 F)
1967	29.4 C (84.9 F)
1999	32.2 C (90.0 F)
2000	28.9 C (84.0 F)
2001	14.4 C (57.9 F)
2002	28.3 C (82.9 F)
2003	27.8 C (82.0 F)

Coldest night (TNn)

The coldest night of the year at Tanacross, 1904 to 2003. The record is -59.4 C (-74.9 F) in 1947, marked on the chart; the median year is -48.9 C (-56.0 F).

Coldest night (TNn) at Tanacross by year
Year	Coldest night (TNn)
1904	-38.3 C (-36.9 F)
1905	-42.8 C (-45.0 F)
1906	-17.2 C (1.0 F)
1941	-46.7 C (-52.1 F)
1942	-51.7 C (-61.1 F)
1943	-52.8 C (-63.0 F)
1944	-45.6 C (-50.1 F)
1945	-46.1 C (-51.0 F)
1946	-55.0 C (-67.0 F)
1947	-59.4 C (-74.9 F)
1948	-53.3 C (-63.9 F)
1949	-47.2 C (-53.0 F)
1950	-49.4 C (-56.9 F)
1951	-52.2 C (-62.0 F)
1952	-55.6 C (-68.1 F)
1953	-51.7 C (-61.1 F)
1954	-51.1 C (-60.0 F)
1955	-53.9 C (-65.0 F)
1956	-56.7 C (-70.1 F)
1957	-48.9 C (-56.0 F)
1958	-44.4 C (-47.9 F)
1959	-51.1 C (-60.0 F)
1960	-45.6 C (-50.1 F)
1961	-53.3 C (-63.9 F)
1962	-53.3 C (-63.9 F)
1963	-48.9 C (-56.0 F)
1964	-48.3 C (-54.9 F)
1965	-47.8 C (-54.0 F)
1966	-47.8 C (-54.0 F)
1967	-9.4 C (15.1 F)
1999	-51.1 C (-60.0 F)
2000	-51.7 C (-61.1 F)
2001	-43.3 C (-45.9 F)
2002	-38.9 C (-38.0 F)
2003	8.9 C (48.0 F)

Wettest day (Rx1day)

The wettest day of the year at Tanacross, 1904 to 2003. The record is 101.6 mm (4.0 in) in 1906, marked on the chart; the median year is 20.7 mm (0.8 in).

Wettest day (Rx1day) at Tanacross by year
Year	Wettest day (Rx1day)
1904	15.5 mm (0.6 in)
1905	53.3 mm (2.1 in)
1906	101.6 mm (4.0 in)
1941	21.1 mm (0.8 in)
1942	27.4 mm (1.1 in)
1943	11.4 mm (0.4 in)
1944	39.4 mm (1.6 in)
1945	19.8 mm (0.8 in)
1946	31.8 mm (1.3 in)
1947	35.1 mm (1.4 in)
1948	21.8 mm (0.9 in)
1949	15.7 mm (0.6 in)
1950	26.7 mm (1.1 in)
1951	14.5 mm (0.6 in)
1952	18.8 mm (0.7 in)
1953	20.1 mm (0.8 in)
1954	24.9 mm (1.0 in)
1955	14.2 mm (0.6 in)
1956	34.8 mm (1.4 in)
1957	19.1 mm (0.8 in)
1958	34.0 mm (1.3 in)
1959	3.6 mm (0.14 in)
1960	15.2 mm (0.6 in)
1961	48.3 mm (1.9 in)
1962	25.4 mm (1.0 in)
1963	20.3 mm (0.8 in)
1964	32.0 mm (1.3 in)
1965	n/a
1966	0.0 mm (0.00 in)
1967	15.2 mm (0.6 in)
1999	96.5 mm (3.8 in)
2000	30.5 mm (1.2 in)
2001	10.2 mm (0.4 in)
2002	18.0 mm (0.7 in)
2003	8.6 mm (0.34 in)

Wettest five days (Rx5day)

The wettest five days of the year at Tanacross, 1904 to 2003. The record is 172.7 mm (6.8 in) in 1999, marked on the chart; the median year is 35.6 mm (1.4 in).

Wettest five days (Rx5day) at Tanacross by year
Year	Wettest five days (Rx5day)
1904	22.6 mm (0.9 in)
1905	53.3 mm (2.1 in)
1906	101.6 mm (4.0 in)
1941	32.8 mm (1.3 in)
1942	37.3 mm (1.5 in)
1943	8.9 mm (0.35 in)
1944	55.7 mm (2.2 in)
1945	35.6 mm (1.4 in)
1946	54.3 mm (2.1 in)
1947	59.6 mm (2.3 in)
1948	30.7 mm (1.2 in)
1949	32.4 mm (1.3 in)
1950	79.5 mm (3.1 in)
1951	35.1 mm (1.4 in)
1952	46.0 mm (1.8 in)
1953	23.9 mm (0.9 in)
1954	49.0 mm (1.9 in)
1955	19.1 mm (0.8 in)
1956	43.5 mm (1.7 in)
1957	32.3 mm (1.3 in)
1958	46.9 mm (1.8 in)
1959	5.3 mm (0.21 in)
1960	31.8 mm (1.3 in)
1961	71.2 mm (2.8 in)
1962	42.9 mm (1.7 in)
1963	21.6 mm (0.9 in)
1964	45.2 mm (1.8 in)
1965	n/a
1966	n/a
1967	28.0 mm (1.1 in)
1999	172.7 mm (6.8 in)
2000	56.4 mm (2.2 in)
2001	19.3 mm (0.8 in)
2002	24.7 mm (1.0 in)
2003	13.8 mm (0.5 in)

Longest dry spell (CDD)

The longest dry spell of the year at Tanacross, 1904 to 2003. The record is 126 days in 2000, marked on the chart; the median year is 44 days.

Longest dry spell (CDD) at Tanacross by year
Year	Longest dry spell (CDD)
1904	27 days
1905	50 days
1906	59 days
1941	33 days
1942	53 days
1943	46 days
1944	39 days
1945	39 days
1946	94 days
1947	59 days
1948	30 days
1949	60 days
1950	31 days
1951	44 days
1952	37 days
1953	89 days
1954	43 days
1955	73 days
1956	44 days
1957	93 days
1958	67 days
1959	38 days
1960	22 days
1961	47 days
1962	26 days
1963	58 days
1964	62 days
1965	n/a
1966	1 day
1967	26 days
1999	21 days
2000	126 days
2001	36 days
2002	26 days
2003	17 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 Tanacross standing records by year: CSV or JSON. Field meanings are on the data page.
Data for Tanacross 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).