Klawock AP Weather Records (USW00025367)

Record envelope, standing records and threshold days for Klawock AP (USW00025367), Alaska, United States, with 30 years of record.

Key Facts for Klawock AP

Klawock AP (USW00025367) is a weather station in Alaska, United States at 55.58 latitude and -133.07 longitude, 21 m (68 ft) above sea level.
The station reports from 1997 to 2026, 30 years of record.
1,464 records set at Klawock AP 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, 55.58 latitude, -133.07 longitude.
Elevation: 21 m (68 ft).
Period of record: 1997 to 2026, 30 years.
Eligible elements: none yet.

Daily Record Envelope and 2026

30 days at or beyond a record

The band shows the record high and record low for each calendar day at Klawock AP. The lines show the 2026 daily maximum and minimum. 30 days in 2026 matched or passed a record. Temperatures are in degrees Celsius.

Daily record high and record low at Klawock AP, with 2026 drawn through them
Month	Highest record high	Lowest record low	2026 highest maximum	2026 lowest minimum
Jan	17.8 C (64.0 F)	-25.6 C (-14.1 F)	11.1 C (52.0 F)	-8.8 C (16.2 F)
Feb	14.4 C (57.9 F)	-26.7 C (-16.1 F)	10.0 C (50.0 F)	-10.5 C (13.1 F)
Mar	21.7 C (71.1 F)	-22.2 C (-8.0 F)	16.7 C (62.1 F)	-3.2 C (26.2 F)
Apr	27.2 C (81.0 F)	-12.2 C (10.0 F)	14.4 C (57.9 F)	-1.0 C (30.2 F)
May	30.0 C (86.0 F)	-2.8 C (27.0 F)	18.3 C (64.9 F)	4.4 C (39.9 F)
Jun	33.3 C (91.9 F)	0.6 C (33.1 F)	20.6 C (69.1 F)	3.9 C (39.0 F)
Jul	34.4 C (93.9 F)	3.9 C (39.0 F)	23.3 C (73.9 F)	7.8 C (46.0 F)
Aug	28.9 C (84.0 F)	2.8 C (37.0 F)	26.7 C (80.1 F)	9.4 C (48.9 F)
Sep	28.3 C (82.9 F)	-2.8 C (27.0 F)	18.3 C (64.9 F)	8.3 C (46.9 F)
Oct	20.0 C (68.0 F)	-16.7 C (1.9 F)	16.7 C (62.1 F)	1.1 C (34.0 F)
Nov	15.6 C (60.1 F)	-20.0 C (-4.0 F)	15.6 C (60.1 F)	-0.6 C (30.9 F)
Dec	18.9 C (66.0 F)	-19.4 C (-2.9 F)	11.7 C (53.1 F)	-10.0 C (14.0 F)

Which Years Hold Standing Records

1,464 standing records

1,464 records at Klawock AP still stand. 1998 holds the most, with 143.

Standing records at Klawock AP by the year they were set
Year set	Standing records
1997	113
1998	143
1999	65
2000	44
2001	43
2002	53
2003	43
2004	64
2005	68
2006	54
2007	27
2008	41
2009	30
2010	62
2011	30
2012	62
2013	19
2014	20
2015	35
2016	83
2017	30
2018	37
2019	55
2020	35
2021	28
2022	52
2023	35
2024	42
2025	51

Wettest Day of Each Month

Oct: 100.1 mm (3.9 in)

The wettest day on record for each calendar month at Klawock AP. The most was 100.1 mm (3.9 in) on 25 October 2003.

Record daily precipitation for each month at Klawock AP
Month	Record daily precipitation (mm)	Date
Jan	61.5 mm (2.4 in)	14 January 2014
Feb	50.8 mm (2.0 in)	3 February 2022
Mar	95.2 mm (3.7 in)	11 March 2014
Apr	50.5 mm (2.0 in)	7 April 2014
May	47.0 mm (1.9 in)	14 May 2008
Jun	33.3 mm (1.3 in)	17 June 2003
Jul	48.0 mm (1.9 in)	23 July 2010
Aug	94.2 mm (3.7 in)	20 August 2011
Sep	66.3 mm (2.6 in)	28 September 2006
Oct	100.1 mm (3.9 in)	25 October 2003
Nov	72.1 mm (2.8 in)	22 November 2005
Dec	69.1 mm (2.7 in)	18 December 2003

Period of Record Coverage

1997 to 2025

29 years of record at Klawock AP, 1997 to 2025. 5 years have data for under 90 percent of days and are left out of rankings: 1997, 1998, 2020, 2023, 2025.

Days with data per year at Klawock AP
Year	Days with data	Share of year	Complete
1997	73	20%	No
1998	325	89%	No
1999	364	100%	Yes
2000	366	100%	Yes
2001	365	100%	Yes
2002	365	100%	Yes
2003	365	100%	Yes
2004	366	100%	Yes
2005	365	100%	Yes
2006	365	100%	Yes
2007	364	100%	Yes
2008	366	100%	Yes
2009	365	100%	Yes
2010	365	100%	Yes
2011	365	100%	Yes
2012	361	99%	Yes
2013	362	99%	Yes
2014	358	98%	Yes
2015	361	99%	Yes
2016	365	100%	Yes
2017	365	100%	Yes
2018	360	99%	Yes
2019	362	99%	Yes
2020	301	82%	No
2021	350	96%	Yes
2022	358	98%	Yes
2023	318	87%	No
2024	360	98%	Yes
2025	309	85%	No

Latest Records

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

Climate Trend

25 complete years, 1999 to 2024

One stripe for each of 25 complete years at Klawock AP, 1999 to 2024. Blue stripes are years cooler than the station's own mean of 7.6 C (45.6 F); red stripes are warmer. The coolest year was 2012, at 6.4 C (43.5 F), and the warmest was 2016, at 9.1 C (48.4 F). The strongest colour marks a difference of 1.6 C (2.9 F).

Annual mean temperature at Klawock AP as warming stripes, 1999 to 2024
Year	Annual mean temperature	Difference from the station mean
1999	6.7 C	-0.87 C
2000	7.1 C	-0.45 C
2001	6.9 C	-0.63 C
2002	7.5 C	-0.08 C
2003	7.5 C	-0.02 C
2004	7.9 C	+0.33 C
2005	8.5 C	+0.89 C
2006	7.0 C	-0.60 C
2007	7.3 C	-0.29 C
2008	6.9 C	-0.64 C
2009	7.4 C	-0.18 C
2010	7.6 C	+0.04 C
2011	6.6 C	-1.01 C
2012	6.4 C	-1.17 C
2013	8.0 C	+0.41 C
2014	7.7 C	+0.15 C
2015	8.5 C	+0.89 C
2016	9.1 C	+1.54 C
2017	7.2 C	-0.33 C
2018	8.2 C	+0.59 C
2019	8.3 C	+0.69 C
2021	6.6 C	-0.96 C
2022	7.8 C	+0.26 C
2023	8.5 C	+0.98 C
2024	8.1 C	+0.53 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

1997 to 2026

Yearly extremes at Klawock AP: 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)	1997	26.7 C (80.1 F)	30
Coldest night (TNn)	-26.7 C (-16.1 F)	1998	-11.7 C (10.9 F)	30
Wettest day (Rx1day)	100.1 mm (3.9 in)	2003	61.5 mm (2.4 in)	29
Wettest five days (Rx5day)	220.4 mm (8.7 in)	2003	136.4 mm (5.4 in)	29
Longest dry spell (CDD)	31 days	2015	13 days	29

Hottest day (TXx)

The hottest day of the year at Klawock AP, 1997 to 2026. The record is 34.4 C (93.9 F) in 1997, marked on the chart; the median year is 26.7 C (80.1 F).

Hottest day (TXx) at Klawock AP by year
Year	Hottest day (TXx)
1997	34.4 C (93.9 F)
1998	20.6 C (69.1 F)
1999	26.7 C (80.1 F)
2000	21.1 C (70.0 F)
2001	22.8 C (73.0 F)
2002	27.8 C (82.0 F)
2003	26.7 C (80.1 F)
2004	33.3 C (91.9 F)
2005	29.4 C (84.9 F)
2006	22.2 C (72.0 F)
2007	26.7 C (80.1 F)
2008	26.7 C (80.1 F)
2009	31.1 C (88.0 F)
2010	26.7 C (80.1 F)
2011	23.3 C (73.9 F)
2012	23.3 C (73.9 F)
2013	30.6 C (87.1 F)
2014	25.0 C (77.0 F)
2015	25.6 C (78.1 F)
2016	28.3 C (82.9 F)
2017	28.3 C (82.9 F)
2018	29.4 C (84.9 F)
2019	26.1 C (79.0 F)
2020	26.7 C (80.1 F)
2021	28.9 C (84.0 F)
2022	25.6 C (78.1 F)
2023	30.0 C (86.0 F)
2024	25.6 C (78.1 F)
2025	26.7 C (80.1 F)
2026	31.1 C (88.0 F)

Coldest night (TNn)

The coldest night of the year at Klawock AP, 1997 to 2026. The record is -26.7 C (-16.1 F) in 1998, marked on the chart; the median year is -11.7 C (10.9 F).

Coldest night (TNn) at Klawock AP by year
Year	Coldest night (TNn)
1997	-20.0 C (-4.0 F)
1998	-26.7 C (-16.1 F)
1999	-10.6 C (12.9 F)
2000	-13.3 C (8.1 F)
2001	-12.8 C (9.0 F)
2002	-10.6 C (12.9 F)
2003	-12.2 C (10.0 F)
2004	-11.7 C (10.9 F)
2005	-13.3 C (8.1 F)
2006	-12.8 C (9.0 F)
2007	-10.6 C (12.9 F)
2008	-11.7 C (10.9 F)
2009	-12.8 C (9.0 F)
2010	-7.2 C (19.0 F)
2011	-10.6 C (12.9 F)
2012	-15.0 C (5.0 F)
2013	-9.3 C (15.3 F)
2014	-11.6 C (11.1 F)
2015	-6.0 C (21.2 F)
2016	-11.6 C (11.1 F)
2017	-11.7 C (10.9 F)
2018	-7.7 C (18.1 F)
2019	-12.7 C (9.1 F)
2020	-13.8 C (7.2 F)
2021	-16.0 C (3.2 F)
2022	-15.5 C (4.1 F)
2023	-7.7 C (18.1 F)
2024	-11.6 C (11.1 F)
2025	-10.5 C (13.1 F)
2026	-6.7 C (19.9 F)

Wettest day (Rx1day)

The wettest day of the year at Klawock AP, 1997 to 2026. The record is 100.1 mm (3.9 in) in 2003, marked on the chart; the median year is 61.5 mm (2.4 in).

Wettest day (Rx1day) at Klawock AP by year
Year	Wettest day (Rx1day)
1997	n/a
1998	45.7 mm (1.8 in)
1999	77.0 mm (3.0 in)
2000	83.1 mm (3.3 in)
2001	59.9 mm (2.4 in)
2002	60.7 mm (2.4 in)
2003	100.1 mm (3.9 in)
2004	63.0 mm (2.5 in)
2005	72.1 mm (2.8 in)
2006	66.3 mm (2.6 in)
2007	46.2 mm (1.8 in)
2008	59.2 mm (2.3 in)
2009	66.3 mm (2.6 in)
2010	62.0 mm (2.4 in)
2011	94.2 mm (3.7 in)
2012	58.9 mm (2.3 in)
2013	62.0 mm (2.4 in)
2014	95.2 mm (3.7 in)
2015	71.4 mm (2.8 in)
2016	50.8 mm (2.0 in)
2017	61.0 mm (2.4 in)
2018	41.1 mm (1.6 in)
2019	46.7 mm (1.8 in)
2020	91.4 mm (3.6 in)
2021	60.7 mm (2.4 in)
2022	66.0 mm (2.6 in)
2023	57.2 mm (2.3 in)
2024	51.8 mm (2.0 in)
2025	51.8 mm (2.0 in)
2026	61.5 mm (2.4 in)

Wettest five days (Rx5day)

The wettest five days of the year at Klawock AP, 1997 to 2026. The record is 220.4 mm (8.7 in) in 2003, marked on the chart; the median year is 136.4 mm (5.4 in).

Wettest five days (Rx5day) at Klawock AP by year
Year	Wettest five days (Rx5day)
1997	n/a
1998	95.4 mm (3.8 in)
1999	206.1 mm (8.1 in)
2000	127.5 mm (5.0 in)
2001	123.9 mm (4.9 in)
2002	121.3 mm (4.8 in)
2003	220.4 mm (8.7 in)
2004	158.7 mm (6.2 in)
2005	170.3 mm (6.7 in)
2006	127.4 mm (5.0 in)
2007	123.9 mm (4.9 in)
2008	154.0 mm (6.1 in)
2009	149.3 mm (5.9 in)
2010	164.0 mm (6.5 in)
2011	178.7 mm (7.0 in)
2012	160.8 mm (6.3 in)
2013	123.9 mm (4.9 in)
2014	153.1 mm (6.0 in)
2015	154.3 mm (6.1 in)
2016	121.9 mm (4.8 in)
2017	115.6 mm (4.6 in)
2018	136.4 mm (5.4 in)
2019	104.2 mm (4.1 in)
2020	114.1 mm (4.5 in)
2021	128.5 mm (5.1 in)
2022	160.5 mm (6.3 in)
2023	114.1 mm (4.5 in)
2024	158.2 mm (6.2 in)
2025	118.1 mm (4.6 in)
2026	164.8 mm (6.5 in)

Longest dry spell (CDD)

The longest dry spell of the year at Klawock AP, 1997 to 2026. The record is 31 days in 2015, marked on the chart; the median year is 13 days.

Longest dry spell (CDD) at Klawock AP by year
Year	Longest dry spell (CDD)
1997	n/a
1998	13 days
1999	10 days
2000	11 days
2001	16 days
2002	12 days
2003	20 days
2004	14 days
2005	9 days
2006	13 days
2007	9 days
2008	12 days
2009	16 days
2010	12 days
2011	13 days
2012	13 days
2013	12 days
2014	15 days
2015	31 days
2016	19 days
2017	12 days
2018	14 days
2019	22 days
2020	11 days
2021	13 days
2022	13 days
2023	12 days
2024	9 days
2025	15 days
2026	14 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.

Frost Dates and Growing Season

25 years with a frost

Across 25 years with a frost, the median last spring frost at Klawock AP falls on 4 May and the median first autumn frost on 17 October, which leaves a median of 168 days between them.

Fitted over all years, the growing season changes by +3.3 days per decade at this station.

Frost dates and growing season at Klawock AP
Measure	Median, all years	Earliest period	Recent period (1999 to 2024)	Recent against earliest	Fitted trend
Last spring frost	4 May	n/a	4 May	n/a	-2.5 days per decade
First autumn frost	17 October	n/a	17 October	n/a	+0.8 days per decade
Growing days	168 days	n/a	168 days	n/a	+3.3 days per decade

A frost day is a day with a daily minimum at or below 0 C (32 F). The last spring frost and the first autumn frost are the last and first such days of the cold season, and growing days are the days between them. A negative trend for the last spring frost means it comes earlier.

Download the Data

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