Mankomen Lake Weather Records (USC00505607)

Record envelope, standing records and threshold days for Mankomen Lake (USC00505607), Alaska, United States, with 44 years of record.

Key Facts for Mankomen Lake

Mankomen Lake (USC00505607) is a weather station in Alaska, United States at 62.99 latitude and -144.48 longitude, 922 m (3,025 ft) above sea level.
The station reports from 1965 to 2008, 44 years of record.
1,464 records set at Mankomen Lake 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, 62.99 latitude, -144.48 longitude.
Elevation: 922 m (3,025 ft).
Period of record: 1965 to 2008, 44 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 Mankomen Lake. 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 Mankomen Lake, with 2026 drawn through them
Month	Highest record high	Lowest record low	2026 highest maximum	2026 lowest minimum
Jan	4.4 C (39.9 F)	-48.9 C (-56.0 F)	n/a	n/a
Feb	7.8 C (46.0 F)	-43.3 C (-45.9 F)	n/a	n/a
Mar	10.6 C (51.1 F)	-41.7 C (-43.1 F)	n/a	n/a
Apr	15.6 C (60.1 F)	-33.3 C (-27.9 F)	n/a	n/a
May	27.2 C (81.0 F)	-17.8 C (0.0 F)	n/a	n/a
Jun	30.0 C (86.0 F)	-6.7 C (19.9 F)	n/a	n/a
Jul	28.9 C (84.0 F)	-2.2 C (28.0 F)	n/a	n/a
Aug	34.4 C (93.9 F)	-7.8 C (18.0 F)	n/a	n/a
Sep	25.0 C (77.0 F)	-17.2 C (1.0 F)	n/a	n/a
Oct	16.1 C (61.0 F)	-36.1 C (-33.0 F)	n/a	n/a
Nov	6.1 C (43.0 F)	-40.6 C (-41.1 F)	n/a	n/a
Dec	5.0 C (41.0 F)	-47.8 C (-54.0 F)	n/a	n/a

Which Years Hold Standing Records

1,464 standing records

1,464 records at Mankomen Lake still stand. 1977 holds the most, with 93.

Standing records at Mankomen Lake by the year they were set
Year set	Standing records
1965	36
1966	75
1967	87
1968	50
1969	81
1970	85
1971	89
1972	54
1973	46
1974	63
1975	85
1976	57
1977	93
1978	50
1979	38
1980	51
1981	67
1982	62
1983	26
2002	48
2003	48
2004	30
2005	40
2006	46
2007	31
2008	26

Wettest Day of Each Month

Sep: 54.9 mm (2.2 in)

The wettest day on record for each calendar month at Mankomen Lake. The most was 54.9 mm (2.2 in) on 9 September 2007.

Record daily precipitation for each month at Mankomen Lake
Month	Record daily precipitation (mm)	Date
Jan	28.4 mm (1.1 in)	3 January 1973
Feb	24.1 mm (0.9 in)	12 February 1974
Mar	18.5 mm (0.7 in)	16 March 1977
Apr	43.7 mm (1.7 in)	4 April 1977
May	27.9 mm (1.1 in)	31 May 1981
Jun	48.5 mm (1.9 in)	25 June 1981
Jul	38.1 mm (1.5 in)	19 July 2008
Aug	53.1 mm (2.1 in)	20 August 2006
Sep	54.9 mm (2.2 in)	9 September 2007
Oct	42.4 mm (1.7 in)	13 October 1981
Nov	25.7 mm (1.0 in)	21 November 1967
Dec	20.3 mm (0.8 in)	18 December 2002

Period of Record Coverage

1965 to 2008

26 years of record at Mankomen Lake, 1965 to 2008. 14 years have data for under 90 percent of days and are left out of rankings: 1965, 1972, 1977, 1978, 1979, 1980, 1981, 1983 and others.

Days with data per year at Mankomen Lake
Year	Days with data	Share of year	Complete
1965	182	50%	No
1966	364	100%	Yes
1967	360	99%	Yes
1968	365	100%	Yes
1969	364	100%	Yes
1970	365	100%	Yes
1971	349	96%	Yes
1972	242	66%	No
1973	365	100%	Yes
1974	356	98%	Yes
1975	362	99%	Yes
1976	366	100%	Yes
1977	304	83%	No
1978	294	81%	No
1979	214	59%	No
1980	303	83%	No
1981	235	64%	No
1982	363	99%	Yes
1983	240	66%	No
2002	172	47%	No
2003	196	54%	No
2004	191	52%	No
2005	183	50%	No
2006	338	93%	Yes
2007	207	57%	No
2008	192	52%	No

Latest Records

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

Climate Trend

12 complete years, 1966 to 2006

One stripe for each of 12 complete years at Mankomen Lake, 1966 to 2006. Blue stripes are years cooler than the station's own mean of -4.5 C (24.0 F); red stripes are warmer. The coolest year was 1975, at -5.6 C (21.9 F), and the warmest was 1976, at -3.4 C (25.9 F). The strongest colour marks a difference of 1.2 C (2.2 F).

Annual mean temperature at Mankomen Lake as warming stripes, 1966 to 2006
Year	Annual mean temperature	Difference from the station mean
1966	-5.3 C	-0.83 C
1967	-4.0 C	+0.47 C
1968	-4.2 C	+0.26 C
1969	-3.4 C	+1.03 C
1970	-3.8 C	+0.69 C
1971	-5.5 C	-1.06 C
1973	-4.8 C	-0.38 C
1974	-4.8 C	-0.32 C
1975	-5.6 C	-1.12 C
1976	-3.4 C	+1.09 C
1982	-4.9 C	-0.44 C
2006	-3.8 C	+0.66 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

1965 to 2008

Yearly extremes at Mankomen Lake: the record and the median year
Measure	Record	Year of the record	Median year	Years with a value
Hottest day (TXx)	34.4 C (93.9 F)	2005	26.1 C (79.0 F)	26
Coldest night (TNn)	-48.9 C (-56.0 F)	1972	-39.4 C (-38.9 F)	26
Wettest day (Rx1day)	54.9 mm (2.2 in)	2007	30.0 mm (1.2 in)	26
Wettest five days (Rx5day)	137.6 mm (5.4 in)	2002	62.9 mm (2.5 in)	26
Longest dry spell (CDD)	61 days	1978	32 days	26

Hottest day (TXx)

The hottest day of the year at Mankomen Lake, 1965 to 2008. The record is 34.4 C (93.9 F) in 2005, marked on the chart; the median year is 26.1 C (79.0 F).

Hottest day (TXx) at Mankomen Lake by year
Year	Hottest day (TXx)
1965	23.9 C (75.0 F)
1966	25.6 C (78.1 F)
1967	26.1 C (79.0 F)
1968	24.4 C (75.9 F)
1969	30.0 C (86.0 F)
1970	23.3 C (73.9 F)
1971	26.7 C (80.1 F)
1972	21.1 C (70.0 F)
1973	24.4 C (75.9 F)
1974	25.0 C (77.0 F)
1975	26.1 C (79.0 F)
1976	28.9 C (84.0 F)
1977	28.3 C (82.9 F)
1978	27.8 C (82.0 F)
1979	25.6 C (78.1 F)
1980	25.6 C (78.1 F)
1981	25.0 C (77.0 F)
1982	26.1 C (79.0 F)
1983	27.2 C (81.0 F)
2002	28.3 C (82.9 F)
2003	28.3 C (82.9 F)
2004	30.0 C (86.0 F)
2005	34.4 C (93.9 F)
2006	28.3 C (82.9 F)
2007	27.8 C (82.0 F)
2008	20.0 C (68.0 F)

Coldest night (TNn)

The coldest night of the year at Mankomen Lake, 1965 to 2008. The record is -48.9 C (-56.0 F) in 1972, marked on the chart; the median year is -39.4 C (-38.9 F).

Coldest night (TNn) at Mankomen Lake by year
Year	Coldest night (TNn)
1965	-39.4 C (-38.9 F)
1966	-40.6 C (-41.1 F)
1967	-38.9 C (-38.0 F)
1968	-44.4 C (-47.9 F)
1969	-40.0 C (-40.0 F)
1970	-42.8 C (-45.0 F)
1971	-47.8 C (-54.0 F)
1972	-48.9 C (-56.0 F)
1973	-38.9 C (-38.0 F)
1974	-42.8 C (-45.0 F)
1975	-45.6 C (-50.1 F)
1976	-37.2 C (-35.0 F)
1977	-43.9 C (-47.0 F)
1978	-37.2 C (-35.0 F)
1979	-40.6 C (-41.1 F)
1980	-35.6 C (-32.1 F)
1981	-40.6 C (-41.1 F)
1982	-48.3 C (-54.9 F)
1983	-34.4 C (-29.9 F)
2002	-29.4 C (-20.9 F)
2003	-36.1 C (-33.0 F)
2004	-37.8 C (-36.0 F)
2005	-35.0 C (-31.0 F)
2006	-39.4 C (-38.9 F)
2007	-34.4 C (-29.9 F)
2008	-38.9 C (-38.0 F)

Wettest day (Rx1day)

The wettest day of the year at Mankomen Lake, 1965 to 2008. The record is 54.9 mm (2.2 in) in 2007, marked on the chart; the median year is 30.0 mm (1.2 in).

Wettest day (Rx1day) at Mankomen Lake by year
Year	Wettest day (Rx1day)
1965	31.8 mm (1.3 in)
1966	29.5 mm (1.2 in)
1967	25.7 mm (1.0 in)
1968	26.9 mm (1.1 in)
1969	25.4 mm (1.0 in)
1970	27.9 mm (1.1 in)
1971	30.5 mm (1.2 in)
1972	19.1 mm (0.8 in)
1973	32.3 mm (1.3 in)
1974	33.5 mm (1.3 in)
1975	31.2 mm (1.2 in)
1976	23.4 mm (0.9 in)
1977	43.7 mm (1.7 in)
1978	23.1 mm (0.9 in)
1979	26.7 mm (1.1 in)
1980	43.7 mm (1.7 in)
1981	48.5 mm (1.9 in)
1982	21.6 mm (0.9 in)
1983	24.9 mm (1.0 in)
2002	42.9 mm (1.7 in)
2003	26.4 mm (1.0 in)
2004	39.4 mm (1.6 in)
2005	28.4 mm (1.1 in)
2006	53.1 mm (2.1 in)
2007	54.9 mm (2.2 in)
2008	38.1 mm (1.5 in)

Wettest five days (Rx5day)

The wettest five days of the year at Mankomen Lake, 1965 to 2008. The record is 137.6 mm (5.4 in) in 2002, marked on the chart; the median year is 62.9 mm (2.5 in).

Wettest five days (Rx5day) at Mankomen Lake by year
Year	Wettest five days (Rx5day)
1965	67.9 mm (2.7 in)
1966	50.4 mm (2.0 in)
1967	80.0 mm (3.1 in)
1968	34.6 mm (1.4 in)
1969	58.5 mm (2.3 in)
1970	59.4 mm (2.3 in)
1971	84.7 mm (3.3 in)
1972	60.9 mm (2.4 in)
1973	62.8 mm (2.5 in)
1974	80.8 mm (3.2 in)
1975	50.8 mm (2.0 in)
1976	57.0 mm (2.2 in)
1977	63.0 mm (2.5 in)
1978	49.8 mm (2.0 in)
1979	47.2 mm (1.9 in)
1980	85.9 mm (3.4 in)
1981	102.1 mm (4.0 in)
1982	42.7 mm (1.7 in)
1983	65.6 mm (2.6 in)
2002	137.6 mm (5.4 in)
2003	58.7 mm (2.3 in)
2004	68.3 mm (2.7 in)
2005	58.9 mm (2.3 in)
2006	98.5 mm (3.9 in)
2007	84.4 mm (3.3 in)
2008	79.8 mm (3.1 in)

Longest dry spell (CDD)

The longest dry spell of the year at Mankomen Lake, 1965 to 2008. The record is 61 days in 1978, marked on the chart; the median year is 32 days.

Longest dry spell (CDD) at Mankomen Lake by year
Year	Longest dry spell (CDD)
1965	17 days
1966	47 days
1967	24 days
1968	39 days
1969	47 days
1970	33 days
1971	29 days
1972	22 days
1973	25 days
1974	35 days
1975	38 days
1976	16 days
1977	45 days
1978	61 days
1979	20 days
1980	36 days
1981	36 days
1982	50 days
1983	33 days
2002	22 days
2003	19 days
2004	30 days
2005	32 days
2006	31 days
2007	20 days
2008	12 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 Mankomen Lake standing records by year: CSV or JSON. Field meanings are on the data page.
Data for Mankomen Lake 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 2026-10-13 (13 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).