Tyonek Weather Records (USC00509494)

Record envelope, standing records and threshold days for Tyonek (USC00509494), Alaska, United States, with 74 years of record.

Key Facts for Tyonek

Tyonek (USC00509494) is a weather station in Alaska, United States at 61.07 latitude and -151.13 longitude, 15 m (49 ft) above sea level.
The station reports from 1898 to 1971, 74 years of record.
1,464 records set at Tyonek 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, 61.07 latitude, -151.13 longitude.
Elevation: 15 m (49 ft).
Period of record: 1898 to 1971, 74 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 Tyonek. 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 Tyonek, with 2026 drawn through them
Month	Highest record high	Lowest record low	2026 highest maximum	2026 lowest minimum
Jan	3.9 C (39.0 F)	-32.8 C (-27.0 F)	n/a	n/a
Feb	9.4 C (48.9 F)	-31.7 C (-25.1 F)	n/a	n/a
Mar	14.4 C (57.9 F)	-22.8 C (-9.0 F)	n/a	n/a
Apr	14.4 C (57.9 F)	-18.3 C (-0.9 F)	n/a	n/a
May	23.3 C (73.9 F)	-11.1 C (12.0 F)	n/a	n/a
Jun	32.8 C (91.0 F)	-1.1 C (30.0 F)	n/a	n/a
Jul	28.3 C (82.9 F)	0.6 C (33.1 F)	n/a	n/a
Aug	31.1 C (88.0 F)	-0.6 C (30.9 F)	n/a	n/a
Sep	26.1 C (79.0 F)	-12.2 C (10.0 F)	n/a	n/a
Oct	16.1 C (61.0 F)	-15.0 C (5.0 F)	n/a	n/a
Nov	8.3 C (46.9 F)	-25.0 C (-13.0 F)	n/a	n/a
Dec	9.4 C (48.9 F)	-29.4 C (-20.9 F)	n/a	n/a

Which Years Hold Standing Records

1,464 standing records

1,464 records at Tyonek still stand. 1903 holds the most, with 155.

Wettest Day of Each Month

Mar: 154.9 mm (6.1 in)

The wettest day on record for each calendar month at Tyonek. The most was 154.9 mm (6.1 in) on 5 March 1901.

Record daily precipitation for each month at Tyonek
Month	Record daily precipitation (mm)	Date
Jan	27.4 mm (1.1 in)	28 January 1901
Feb	153.9 mm (6.1 in)	28 February 1901
Mar	154.9 mm (6.1 in)	5 March 1901
Apr	19.8 mm (0.8 in)	9 April 1909
May	16.0 mm (0.6 in)	5 May 1899
Jun	22.9 mm (0.9 in)	12 June 1970
Jul	35.6 mm (1.4 in)	20 July 1967
Aug	50.8 mm (2.0 in)	10 August 1901
Sep	42.9 mm (1.7 in)	20 September 1907
Oct	59.9 mm (2.4 in)	15 October 1901
Nov	28.4 mm (1.1 in)	2 November 1967
Dec	35.6 mm (1.4 in)	11 December 1902

Period of Record Coverage

1898 to 1970

16 years of record at Tyonek, 1898 to 1970. 10 years have data for under 90 percent of days and are left out of rankings: 1898, 1904, 1905, 1906, 1908, 1909, 1967, 1968 and others.

Days with data per year at Tyonek
Year	Days with data	Share of year	Complete
1898	60	16%	No
1899	360	99%	Yes
1900	360	99%	Yes
1901	333	91%	Yes
1902	333	91%	Yes
1903	359	98%	Yes
1904	60	16%	No
1905	213	58%	No
1906	318	87%	No
1907	334	92%	Yes
1908	212	58%	No
1909	120	33%	No
1967	171	47%	No
1968	229	63%	No
1969	295	81%	No
1970	283	78%	No

Latest Records

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

Extremes by Year

1898 to 1971

Yearly extremes at Tyonek: 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)	1903	24.4 C (75.9 F)	16
Coldest night (TNn)	-32.8 C (-27.0 F)	1902	-26.6 C (-16.0 F)	16
Wettest day (Rx1day)	154.9 mm (6.1 in)	1901	27.9 mm (1.1 in)	17
Wettest five days (Rx5day)	83.5 mm (3.3 in)	1901	47.5 mm (1.9 in)	16
Longest dry spell (CDD)	124 days	1968	28 days	17

Hottest day (TXx)

The hottest day of the year at Tyonek, 1898 to 1971. The record is 32.8 C (91.0 F) in 1903, marked on the chart; the median year is 24.4 C (75.9 F).

Hottest day (TXx) at Tyonek by year
Year	Hottest day (TXx)
1898	4.4 C (39.9 F)
1899	31.1 C (88.0 F)
1900	24.4 C (75.9 F)
1901	28.3 C (82.9 F)
1902	27.8 C (82.0 F)
1903	32.8 C (91.0 F)
1904	2.8 C (37.0 F)
1905	26.7 C (80.1 F)
1906	23.3 C (73.9 F)
1907	22.8 C (73.0 F)
1908	27.2 C (81.0 F)
1909	14.4 C (57.9 F)
1967	28.3 C (82.9 F)
1968	24.4 C (75.9 F)
1969	22.8 C (73.0 F)
1970	22.8 C (73.0 F)
1971	n/a

Coldest night (TNn)

The coldest night of the year at Tyonek, 1898 to 1971. The record is -32.8 C (-27.0 F) in 1902, marked on the chart; the median year is -26.6 C (-16.0 F).

Coldest night (TNn) at Tyonek by year
Year	Coldest night (TNn)
1898	-21.7 C (-7.1 F)
1899	-17.8 C (0.0 F)
1900	-32.2 C (-26.0 F)
1901	-28.3 C (-18.9 F)
1902	-32.8 C (-27.0 F)
1903	-29.4 C (-20.9 F)
1904	-26.1 C (-15.0 F)
1905	-25.6 C (-14.1 F)
1906	-32.8 C (-27.0 F)
1907	-31.7 C (-25.1 F)
1908	-28.9 C (-20.0 F)
1909	-27.2 C (-17.0 F)
1967	-17.8 C (0.0 F)
1968	-17.8 C (0.0 F)
1969	-16.7 C (1.9 F)
1970	-17.8 C (0.0 F)
1971	n/a

Wettest day (Rx1day)

The wettest day of the year at Tyonek, 1898 to 1971. The record is 154.9 mm (6.1 in) in 1901, marked on the chart; the median year is 27.9 mm (1.1 in).

Wettest day (Rx1day) at Tyonek by year
Year	Wettest day (Rx1day)
1898	22.4 mm (0.9 in)
1899	48.3 mm (1.9 in)
1900	27.9 mm (1.1 in)
1901	154.9 mm (6.1 in)
1902	38.6 mm (1.5 in)
1903	30.5 mm (1.2 in)
1904	7.9 mm (0.31 in)
1905	33.3 mm (1.3 in)
1906	35.1 mm (1.4 in)
1907	42.9 mm (1.7 in)
1908	26.2 mm (1.0 in)
1909	19.8 mm (0.8 in)
1967	35.6 mm (1.4 in)
1968	1.3 mm (0.05 in)
1969	23.1 mm (0.9 in)
1970	22.9 mm (0.9 in)
1971	0.8 mm (0.03 in)

Wettest five days (Rx5day)

The wettest five days of the year at Tyonek, 1898 to 1971. The record is 83.5 mm (3.3 in) in 1901, marked on the chart; the median year is 47.5 mm (1.9 in).

Wettest five days (Rx5day) at Tyonek by year
Year	Wettest five days (Rx5day)
1898	33.3 mm (1.3 in)
1899	66.0 mm (2.6 in)
1900	64.3 mm (2.5 in)
1901	83.5 mm (3.3 in)
1902	73.7 mm (2.9 in)
1903	58.4 mm (2.3 in)
1904	13.7 mm (0.5 in)
1905	42.0 mm (1.7 in)
1906	41.9 mm (1.6 in)
1907	81.0 mm (3.2 in)
1908	31.0 mm (1.2 in)
1909	26.1 mm (1.0 in)
1967	60.2 mm (2.4 in)
1968	1.6 mm (0.06 in)
1969	40.9 mm (1.6 in)
1970	52.9 mm (2.1 in)
1971	n/a

Longest dry spell (CDD)

The longest dry spell of the year at Tyonek, 1898 to 1971. The record is 124 days in 1968, marked on the chart; the median year is 28 days.

Longest dry spell (CDD) at Tyonek by year
Year	Longest dry spell (CDD)
1898	9 days
1899	36 days
1900	22 days
1901	29 days
1902	33 days
1903	28 days
1904	13 days
1905	21 days
1906	30 days
1907	20 days
1908	48 days
1909	26 days
1967	20 days
1968	124 days
1969	34 days
1970	44 days
1971	2 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 Tyonek standing records by year: CSV or JSON. Field meanings are on the data page.
Data for Tyonek 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).