White Mtn Weather Records (USC00509798)

Record envelope, standing records and threshold days for White Mtn (USC00509798), Alaska, United States, with 105 years of record.

Key Facts for White Mtn

White Mtn (USC00509798) is a weather station in Alaska, United States at 64.68 latitude and -163.40 longitude, 6 m (20 ft) above sea level.
The station reports from 1922 to 2026, 105 years of record.
1,464 records set at White Mtn 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, 64.68 latitude, -163.40 longitude.
Elevation: 6 m (20 ft).
Period of record: 1922 to 2026, 105 years.
Eligible elements: none yet.

Daily Record Envelope and 2026

12 days at or beyond a record

The band shows the record high and record low for each calendar day at White Mtn. The lines show the 2026 daily maximum and minimum. 12 days in 2026 matched or passed a record. Temperatures are in degrees Celsius.

Daily record high and record low at White Mtn, with 2026 drawn through them
Month	Highest record high	Lowest record low	2026 highest maximum	2026 lowest minimum
Jan	7.8 C (46.0 F)	-48.3 C (-54.9 F)	2.8 C (37.0 F)	-32.8 C (-27.0 F)
Feb	10.6 C (51.1 F)	-45.0 C (-49.0 F)	1.1 C (34.0 F)	-24.4 C (-11.9 F)
Mar	8.9 C (48.0 F)	-42.2 C (-44.0 F)	1.7 C (35.1 F)	-24.4 C (-11.9 F)
Apr	15.6 C (60.1 F)	-34.4 C (-29.9 F)	8.3 C (46.9 F)	-23.9 C (-11.0 F)
May	26.1 C (79.0 F)	-20.0 C (-4.0 F)	17.2 C (63.0 F)	-4.4 C (24.1 F)
Jun	31.1 C (88.0 F)	-7.8 C (18.0 F)	26.7 C (80.1 F)	-2.2 C (28.0 F)
Jul	32.2 C (90.0 F)	-8.9 C (16.0 F)	20.0 C (68.0 F)	7.2 C (45.0 F)
Aug	31.7 C (89.1 F)	-7.2 C (19.0 F)	25.0 C (77.0 F)	2.2 C (36.0 F)
Sep	23.9 C (75.0 F)	-13.9 C (7.0 F)	7.2 C (45.0 F)	-5.6 C (21.9 F)
Oct	19.4 C (66.9 F)	-25.0 C (-13.0 F)	8.3 C (46.9 F)	-12.8 C (9.0 F)
Nov	9.4 C (48.9 F)	-36.7 C (-34.1 F)	2.2 C (36.0 F)	-20.6 C (-5.1 F)
Dec	7.8 C (46.0 F)	-44.4 C (-47.9 F)	0.0 C (32.0 F)	-27.2 C (-17.0 F)

Which Years Hold Standing Records

1,464 standing records

1,464 records at White Mtn still stand. 1924 holds the most, with 113.

Standing records at White Mtn by the year they were set
Year set	Standing records
1922	90
1923	80
1924	113
1925	76
1926	95
1927	66
1928	57
1929	72
1930	98
1931	45
1932	58
1933	60
1934	66
1935	18
1936	46
1937	41
1938	43
1939	30
1940	57
1941	24
1942	18
1943	52
1944	19
1945	21
1946	2
1988	15
1989	6
1990	37
2024	32
2025	27

Wettest Day of Each Month

Jan: 80.3 mm (3.2 in)

The wettest day on record for each calendar month at White Mtn. The most was 80.3 mm (3.2 in) on 21 January 1929.

Record daily precipitation for each month at White Mtn
Month	Record daily precipitation (mm)	Date
Jan	80.3 mm (3.2 in)	21 January 1929
Feb	26.4 mm (1.0 in)	21 February 1928
Mar	12.7 mm (0.5 in)	18 March 1930
Apr	14.0 mm (0.6 in)	4 April 1944
May	17.8 mm (0.7 in)	29 May 1930
Jun	38.1 mm (1.5 in)	27 June 1930
Jul	76.2 mm (3.0 in)	14 July 1931
Aug	60.5 mm (2.4 in)	19 August 1938
Sep	61.0 mm (2.4 in)	26 September 1938
Oct	26.4 mm (1.0 in)	8 October 1930
Nov	28.4 mm (1.1 in)	10 November 1938
Dec	25.4 mm (1.0 in)	27 December 1926

Period of Record Coverage

1922 to 2025

29 years of record at White Mtn, 1922 to 2025. 18 years have data for under 90 percent of days and are left out of rankings: 1927, 1928, 1931, 1932, 1934, 1935, 1936, 1938 and others.

Days with data per year at White Mtn
Year	Days with data	Share of year	Complete
1922	341	93%	Yes
1923	330	90%	Yes
1924	358	98%	Yes
1925	357	98%	Yes
1926	345	95%	Yes
1927	328	90%	No
1928	277	76%	No
1929	346	95%	Yes
1930	361	99%	Yes
1931	325	89%	No
1932	271	74%	No
1933	349	96%	Yes
1934	320	88%	No
1935	166	45%	No
1936	274	75%	No
1937	342	94%	Yes
1938	297	81%	No
1939	236	65%	No
1940	352	96%	Yes
1941	210	58%	No
1942	130	36%	No
1943	336	92%	Yes
1944	201	55%	No
1945	25	7%	No
1988	81	22%	No
1989	60	16%	No
1990	115	32%	No
2024	329	90%	No
2025	316	87%	No

Latest Records

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

Climate Trend

11 complete years, 1924 to 2023

One stripe for each of 11 complete years at White Mtn, 1924 to 2023. Blue stripes are years cooler than the station's own mean of -2.8 C (26.9 F); red stripes are warmer. The coolest year was 1924, at -4.7 C (23.6 F), and the warmest was 1926, at -1.0 C (30.3 F). The strongest colour marks a difference of 1.9 C (3.4 F).

Annual mean temperature at White Mtn as warming stripes, 1924 to 2023
Year	Annual mean temperature	Difference from the station mean
1924	-4.7 C	-1.84 C
1925	-2.3 C	+0.50 C
1926	-1.0 C	+1.87 C
1927	-2.6 C	+0.27 C
1930	-4.5 C	-1.69 C
1933	-4.4 C	-1.57 C
1937	-1.8 C	+1.00 C
1943	-2.8 C	+0.05 C
2021	-3.5 C	-0.66 C
2022	-1.1 C	+1.77 C
2023	-2.5 C	+0.35 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

1922 to 2026

Yearly extremes at White Mtn: the record and the median year
Measure	Record	Year of the record	Median year	Years with a value
Hottest day (TXx)	32.2 C (90.0 F)	1929	25.0 C (77.0 F)	34
Coldest night (TNn)	-48.3 C (-54.9 F)	1925	-38.9 C (-38.0 F)	35
Wettest day (Rx1day)	80.3 mm (3.2 in)	1929	23.4 mm (0.9 in)	35
Wettest five days (Rx5day)	150.5 mm (5.9 in)	1929	34.6 mm (1.4 in)	34
Longest dry spell (CDD)	139 days	2022	33 days	35

Hottest day (TXx)

The hottest day of the year at White Mtn, 1922 to 2026. The record is 32.2 C (90.0 F) in 1929, marked on the chart; the median year is 25.0 C (77.0 F).

Hottest day (TXx) at White Mtn by year
Year	Hottest day (TXx)
1922	20.6 C (69.1 F)
1923	29.4 C (84.9 F)
1924	28.3 C (82.9 F)
1925	26.7 C (80.1 F)
1926	31.7 C (89.1 F)
1927	26.7 C (80.1 F)
1928	30.0 C (86.0 F)
1929	32.2 C (90.0 F)
1930	22.2 C (72.0 F)
1931	23.3 C (73.9 F)
1932	15.6 C (60.1 F)
1933	23.9 C (75.0 F)
1934	20.6 C (69.1 F)
1935	23.3 C (73.9 F)
1936	31.7 C (89.1 F)
1937	28.9 C (84.0 F)
1938	24.4 C (75.9 F)
1939	12.2 C (54.0 F)
1940	25.6 C (78.1 F)
1941	25.0 C (77.0 F)
1942	22.8 C (73.0 F)
1943	24.4 C (75.9 F)
1944	23.3 C (73.9 F)
1945	5.6 C (42.1 F)
1946	n/a
1988	9.4 C (48.9 F)
1989	10.6 C (51.1 F)
1990	26.1 C (79.0 F)
2020	25.0 C (77.0 F)
2021	28.3 C (82.9 F)
2022	25.0 C (77.0 F)
2023	22.8 C (73.0 F)
2024	25.6 C (78.1 F)
2025	26.7 C (80.1 F)
2026	25.0 C (77.0 F)

Coldest night (TNn)

The coldest night of the year at White Mtn, 1922 to 2026. The record is -48.3 C (-54.9 F) in 1925, marked on the chart; the median year is -38.9 C (-38.0 F).

Coldest night (TNn) at White Mtn by year
Year	Coldest night (TNn)
1922	-41.1 C (-42.0 F)
1923	-40.0 C (-40.0 F)
1924	-42.8 C (-45.0 F)
1925	-48.3 C (-54.9 F)
1926	-36.7 C (-34.1 F)
1927	-42.2 C (-44.0 F)
1928	-42.8 C (-45.0 F)
1929	-44.4 C (-47.9 F)
1930	-40.0 C (-40.0 F)
1931	-38.9 C (-38.0 F)
1932	-44.4 C (-47.9 F)
1933	-46.7 C (-52.1 F)
1934	-46.7 C (-52.1 F)
1935	-38.3 C (-36.9 F)
1936	-34.4 C (-29.9 F)
1937	-37.2 C (-35.0 F)
1938	-41.1 C (-42.0 F)
1939	-41.1 C (-42.0 F)
1940	-41.1 C (-42.0 F)
1941	-34.4 C (-29.9 F)
1942	-35.6 C (-32.1 F)
1943	-37.8 C (-36.0 F)
1944	-38.3 C (-36.9 F)
1945	-39.4 C (-38.9 F)
1946	-39.4 C (-38.9 F)
1988	-36.1 C (-33.0 F)
1989	-38.3 C (-36.9 F)
1990	-45.0 C (-49.0 F)
2020	-27.8 C (-18.0 F)
2021	-30.0 C (-22.0 F)
2022	-35.0 C (-31.0 F)
2023	-30.0 C (-22.0 F)
2024	-34.4 C (-29.9 F)
2025	-32.8 C (-27.0 F)
2026	-31.7 C (-25.1 F)

Wettest day (Rx1day)

The wettest day of the year at White Mtn, 1922 to 2026. The record is 80.3 mm (3.2 in) in 1929, marked on the chart; the median year is 23.4 mm (0.9 in).

Wettest day (Rx1day) at White Mtn by year
Year	Wettest day (Rx1day)
1922	24.9 mm (1.0 in)
1923	47.2 mm (1.9 in)
1924	52.1 mm (2.1 in)
1925	24.4 mm (1.0 in)
1926	25.4 mm (1.0 in)
1927	23.4 mm (0.9 in)
1928	66.0 mm (2.6 in)
1929	80.3 mm (3.2 in)
1930	53.1 mm (2.1 in)
1931	76.2 mm (3.0 in)
1932	50.8 mm (2.0 in)
1933	25.4 mm (1.0 in)
1934	12.7 mm (0.5 in)
1935	25.4 mm (1.0 in)
1936	13.5 mm (0.5 in)
1937	25.1 mm (1.0 in)
1938	61.0 mm (2.4 in)
1939	6.1 mm (0.24 in)
1940	43.2 mm (1.7 in)
1941	19.8 mm (0.8 in)
1942	0.0 mm (0.00 in)
1943	18.3 mm (0.7 in)
1944	14.0 mm (0.6 in)
1945	12.7 mm (0.5 in)
1946	12.7 mm (0.5 in)
1988	8.4 mm (0.33 in)
1989	9.4 mm (0.37 in)
1990	1.0 mm (0.04 in)
2020	7.6 mm (0.30 in)
2021	29.7 mm (1.2 in)
2022	1.0 mm (0.04 in)
2023	15.7 mm (0.6 in)
2024	5.8 mm (0.23 in)
2025	18.3 mm (0.7 in)
2026	26.4 mm (1.0 in)

Wettest five days (Rx5day)

The wettest five days of the year at White Mtn, 1922 to 2026. The record is 150.5 mm (5.9 in) in 1929, marked on the chart; the median year is 34.6 mm (1.4 in).

Wettest five days (Rx5day) at White Mtn by year
Year	Wettest five days (Rx5day)
1922	35.0 mm (1.4 in)
1923	50.0 mm (2.0 in)
1924	80.1 mm (3.2 in)
1925	54.4 mm (2.1 in)
1926	44.2 mm (1.7 in)
1927	51.0 mm (2.0 in)
1928	108.0 mm (4.3 in)
1929	150.5 mm (5.9 in)
1930	61.6 mm (2.4 in)
1931	133.3 mm (5.2 in)
1932	29.2 mm (1.1 in)
1933	50.8 mm (2.0 in)
1934	10.7 mm (0.4 in)
1935	26.7 mm (1.1 in)
1936	20.9 mm (0.8 in)
1937	80.8 mm (3.2 in)
1938	61.0 mm (2.4 in)
1939	12.2 mm (0.5 in)
1940	48.7 mm (1.9 in)
1941	49.5 mm (1.9 in)
1942	n/a
1943	33.1 mm (1.3 in)
1944	16.3 mm (0.6 in)
1945	31.2 mm (1.2 in)
1946	18.5 mm (0.7 in)
1988	10.4 mm (0.4 in)
1989	11.4 mm (0.4 in)
1990	2.3 mm (0.09 in)
2020	8.9 mm (0.35 in)
2021	72.7 mm (2.9 in)
2022	1.0 mm (0.04 in)
2023	34.2 mm (1.3 in)
2024	6.3 mm (0.25 in)
2025	24.7 mm (1.0 in)
2026	67.1 mm (2.6 in)

Longest dry spell (CDD)

The longest dry spell of the year at White Mtn, 1922 to 2026. The record is 139 days in 2022, marked on the chart; the median year is 33 days.

Longest dry spell (CDD) at White Mtn by year
Year	Longest dry spell (CDD)
1922	31 days
1923	29 days
1924	35 days
1925	70 days
1926	117 days
1927	46 days
1928	61 days
1929	91 days
1930	26 days
1931	33 days
1932	61 days
1933	71 days
1934	21 days
1935	28 days
1936	29 days
1937	37 days
1938	27 days
1939	24 days
1940	34 days
1941	55 days
1942	1 day
1943	19 days
1944	30 days
1945	14 days
1946	24 days
1988	30 days
1989	10 days
1990	21 days
2020	30 days
2021	99 days
2022	139 days
2023	42 days
2024	44 days
2025	61 days
2026	52 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 White Mtn standing records by year: CSV or JSON. Field meanings are on the data page.
Data for White Mtn 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).