Palmer AP Weather Records (USW00025331)

Record envelope, standing records and threshold days for Palmer AP (USW00025331), Alaska, United States, with 30 years of record.

Key Facts for Palmer AP

Palmer AP (USW00025331) is a weather station in Alaska, United States at 61.59 latitude and -149.09 longitude, 71 m (233 ft) above sea level.
The station reports from 1997 to 2026, 30 years of record.
1,464 records set at Palmer 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, 61.59 latitude, -149.09 longitude.
Elevation: 71 m (233 ft).
Period of record: 1997 to 2026, 30 years.
Eligible elements: none yet.

Daily Record Envelope and 2026

28 days at or beyond a record

The band shows the record high and record low for each calendar day at Palmer AP. The lines show the 2026 daily maximum and minimum. 28 days in 2026 matched or passed a record. Temperatures are in degrees Celsius.

Daily record high and record low at Palmer AP, with 2026 drawn through them
Month	Highest record high	Lowest record low	2026 highest maximum	2026 lowest minimum
Jan	14.4 C (57.9 F)	-32.8 C (-27.0 F)	8.9 C (48.0 F)	-23.2 C (-9.8 F)
Feb	16.7 C (62.1 F)	-39.4 C (-38.9 F)	6.1 C (43.0 F)	-21.6 C (-6.9 F)
Mar	15.0 C (59.0 F)	-24.4 C (-11.9 F)	10.6 C (51.1 F)	-8.2 C (17.2 F)
Apr	22.8 C (73.0 F)	-22.2 C (-8.0 F)	13.9 C (57.0 F)	-3.2 C (26.2 F)
May	26.7 C (80.1 F)	-5.6 C (21.9 F)	19.4 C (66.9 F)	0.0 C (32.0 F)
Jun	30.0 C (86.0 F)	1.7 C (35.1 F)	23.9 C (75.0 F)	3.3 C (37.9 F)
Jul	31.1 C (88.0 F)	5.6 C (42.1 F)	24.4 C (75.9 F)	7.8 C (46.0 F)
Aug	29.4 C (84.9 F)	0.0 C (32.0 F)	21.7 C (71.1 F)	4.4 C (39.9 F)
Sep	21.1 C (70.0 F)	-6.0 C (21.2 F)	13.3 C (55.9 F)	0.6 C (33.1 F)
Oct	19.4 C (66.9 F)	-19.4 C (-2.9 F)	14.4 C (57.9 F)	-4.4 C (24.1 F)
Nov	12.8 C (55.0 F)	-28.2 C (-18.8 F)	7.2 C (45.0 F)	-18.3 C (-0.9 F)
Dec	11.1 C (52.0 F)	-31.7 C (-25.1 F)	4.4 C (39.9 F)	-24.4 C (-11.9 F)

Which Years Hold Standing Records

1,464 standing records

1,464 records at Palmer AP still stand. 2013 holds the most, with 104.

Standing records at Palmer AP by the year they were set
Year set	Standing records
1997	17
1998	34
1999	79
2000	47
2001	85
2002	77
2003	57
2004	66
2005	45
2006	52
2007	65
2008	42
2009	57
2010	24
2011	25
2012	48
2013	104
2014	58
2015	54
2016	61
2017	38
2018	24
2019	59
2020	40
2021	53
2022	41
2023	36
2024	33
2025	43

Wettest Day of Each Month

Jan: 45.5 mm (1.8 in)

The wettest day on record for each calendar month at Palmer AP. The most was 45.5 mm (1.8 in) on 12 January 2025.

Record daily precipitation for each month at Palmer AP
Month	Record daily precipitation (mm)	Date
Jan	45.5 mm (1.8 in)	12 January 2025
Feb	27.2 mm (1.1 in)	21 February 2016
Mar	15.5 mm (0.6 in)	13 March 2005
Apr	16.5 mm (0.6 in)	17 April 2019
May	17.3 mm (0.7 in)	25 May 1999
Jun	22.6 mm (0.9 in)	6 June 2016
Jul	29.7 mm (1.2 in)	30 July 2004
Aug	38.1 mm (1.5 in)	1 August 2022
Sep	35.1 mm (1.4 in)	5 September 2021
Oct	24.9 mm (1.0 in)	3 October 2003
Nov	23.1 mm (0.9 in)	8 November 2023
Dec	20.1 mm (0.8 in)	18 December 2011

Period of Record Coverage

1997 to 2025

29 years of record at Palmer AP, 1997 to 2025. 1 years have data for under 90 percent of days and are left out of rankings: 1997.

Days with data per year at Palmer AP
Year	Days with data	Share of year	Complete
1997	92	25%	No
1998	364	100%	Yes
1999	360	99%	Yes
2000	365	100%	Yes
2001	365	100%	Yes
2002	364	100%	Yes
2003	365	100%	Yes
2004	365	100%	Yes
2005	365	100%	Yes
2006	365	100%	Yes
2007	365	100%	Yes
2008	366	100%	Yes
2009	364	100%	Yes
2010	365	100%	Yes
2011	365	100%	Yes
2012	366	100%	Yes
2013	365	100%	Yes
2014	365	100%	Yes
2015	365	100%	Yes
2016	366	100%	Yes
2017	365	100%	Yes
2018	365	100%	Yes
2019	365	100%	Yes
2020	366	100%	Yes
2021	365	100%	Yes
2022	364	100%	Yes
2023	362	99%	Yes
2024	366	100%	Yes
2025	338	93%	Yes

Latest Records

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

Climate Trend

27 complete years, 1998 to 2024

One stripe for each of 27 complete years at Palmer AP, 1998 to 2024. Blue stripes are years cooler than the station's own mean of 3.0 C (37.4 F); red stripes are warmer. The coolest year was 1999, at 0.9 C (33.7 F), and the warmest was 2016, at 5.0 C (40.9 F). The strongest colour marks a difference of 2.1 C (3.8 F).

Annual mean temperature at Palmer AP as warming stripes, 1998 to 2024
Year	Annual mean temperature	Difference from the station mean
1998	2.5 C	-0.52 C
1999	0.9 C	-2.09 C
2000	3.5 C	+0.46 C
2001	2.7 C	-0.35 C
2002	4.1 C	+1.06 C
2003	3.7 C	+0.69 C
2004	3.5 C	+0.51 C
2005	3.7 C	+0.66 C
2006	1.9 C	-1.12 C
2007	2.5 C	-0.52 C
2008	1.4 C	-1.63 C
2009	2.2 C	-0.79 C
2010	2.9 C	-0.15 C
2011	2.3 C	-0.75 C
2012	1.1 C	-1.87 C
2013	2.8 C	-0.24 C
2014	4.3 C	+1.24 C
2015	3.9 C	+0.92 C
2016	5.0 C	+1.95 C
2017	2.5 C	-0.50 C
2018	3.7 C	+0.71 C
2019	4.9 C	+1.88 C
2020	2.4 C	-0.57 C
2021	1.8 C	-1.23 C
2022	4.2 C	+1.21 C
2023	3.9 C	+0.88 C
2024	3.2 C	+0.20 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 Palmer AP: the record and the median year
Measure	Record	Year of the record	Median year	Years with a value
Hottest day (TXx)	31.1 C (88.0 F)	2019	26.4 C (79.5 F)	30
Coldest night (TNn)	-39.4 C (-38.9 F)	1999	-26.6 C (-16.0 F)	30
Wettest day (Rx1day)	45.5 mm (1.8 in)	2025	22.6 mm (0.9 in)	29
Wettest five days (Rx5day)	85.3 mm (3.4 in)	2004	39.6 mm (1.6 in)	29
Longest dry spell (CDD)	139 days	2011	40 days	29

Hottest day (TXx)

The hottest day of the year at Palmer AP, 1997 to 2026. The record is 31.1 C (88.0 F) in 2019, marked on the chart; the median year is 26.4 C (79.5 F).

Hottest day (TXx) at Palmer AP by year
Year	Hottest day (TXx)
1997	10.6 C (51.1 F)
1998	24.4 C (75.9 F)
1999	26.7 C (80.1 F)
2000	23.9 C (75.0 F)
2001	25.0 C (77.0 F)
2002	26.7 C (80.1 F)
2003	28.9 C (84.0 F)
2004	29.4 C (84.9 F)
2005	26.7 C (80.1 F)
2006	26.1 C (79.0 F)
2007	26.7 C (80.1 F)
2008	22.2 C (72.0 F)
2009	27.2 C (81.0 F)
2010	25.0 C (77.0 F)
2011	25.6 C (78.1 F)
2012	24.4 C (75.9 F)
2013	29.4 C (84.9 F)
2014	25.6 C (78.1 F)
2015	30.0 C (86.0 F)
2016	27.2 C (81.0 F)
2017	25.0 C (77.0 F)
2018	27.8 C (82.0 F)
2019	31.1 C (88.0 F)
2020	27.2 C (81.0 F)
2021	28.3 C (82.9 F)
2022	27.8 C (82.0 F)
2023	26.1 C (79.0 F)
2024	26.1 C (79.0 F)
2025	24.4 C (75.9 F)
2026	26.1 C (79.0 F)

Coldest night (TNn)

The coldest night of the year at Palmer AP, 1997 to 2026. The record is -39.4 C (-38.9 F) in 1999, marked on the chart; the median year is -26.6 C (-16.0 F).

Coldest night (TNn) at Palmer AP by year
Year	Coldest night (TNn)
1997	-25.6 C (-14.1 F)
1998	-26.1 C (-15.0 F)
1999	-39.4 C (-38.9 F)
2000	-25.6 C (-14.1 F)
2001	-31.7 C (-25.1 F)
2002	-23.3 C (-9.9 F)
2003	-26.7 C (-16.1 F)
2004	-31.1 C (-24.0 F)
2005	-25.0 C (-13.0 F)
2006	-30.0 C (-22.0 F)
2007	-32.8 C (-27.0 F)
2008	-30.6 C (-23.1 F)
2009	-32.2 C (-26.0 F)
2010	-22.2 C (-8.0 F)
2011	-25.6 C (-14.1 F)
2012	-30.0 C (-22.0 F)
2013	-28.2 C (-18.8 F)
2014	-19.9 C (-3.8 F)
2015	-23.8 C (-10.8 F)
2016	-24.3 C (-11.7 F)
2017	-32.1 C (-25.8 F)
2018	-23.8 C (-10.8 F)
2019	-25.5 C (-13.9 F)
2020	-29.9 C (-21.8 F)
2021	-26.6 C (-15.9 F)
2022	-26.6 C (-15.9 F)
2023	-27.1 C (-16.8 F)
2024	-31.6 C (-24.9 F)
2025	-24.4 C (-11.9 F)
2026	-30.6 C (-23.1 F)

Wettest day (Rx1day)

The wettest day of the year at Palmer AP, 1997 to 2026. The record is 45.5 mm (1.8 in) in 2025, marked on the chart; the median year is 22.6 mm (0.9 in).

Wettest day (Rx1day) at Palmer AP by year
Year	Wettest day (Rx1day)
1997	n/a
1998	19.3 mm (0.8 in)
1999	33.3 mm (1.3 in)
2000	24.1 mm (0.9 in)
2001	16.3 mm (0.6 in)
2002	22.1 mm (0.9 in)
2003	24.9 mm (1.0 in)
2004	30.7 mm (1.2 in)
2005	23.4 mm (0.9 in)
2006	18.0 mm (0.7 in)
2007	13.5 mm (0.5 in)
2008	13.2 mm (0.5 in)
2009	22.9 mm (0.9 in)
2010	18.5 mm (0.7 in)
2011	27.2 mm (1.1 in)
2012	21.1 mm (0.8 in)
2013	16.5 mm (0.6 in)
2014	22.4 mm (0.9 in)
2015	24.1 mm (0.9 in)
2016	27.2 mm (1.1 in)
2017	22.6 mm (0.9 in)
2018	21.8 mm (0.9 in)
2019	21.8 mm (0.9 in)
2020	22.9 mm (0.9 in)
2021	35.1 mm (1.4 in)
2022	38.1 mm (1.5 in)
2023	23.1 mm (0.9 in)
2024	19.6 mm (0.8 in)
2025	45.5 mm (1.8 in)
2026	16.0 mm (0.6 in)

Wettest five days (Rx5day)

The wettest five days of the year at Palmer AP, 1997 to 2026. The record is 85.3 mm (3.4 in) in 2004, marked on the chart; the median year is 39.6 mm (1.6 in).

Wettest five days (Rx5day) at Palmer AP by year
Year	Wettest five days (Rx5day)
1997	n/a
1998	37.9 mm (1.5 in)
1999	60.0 mm (2.4 in)
2000	63.9 mm (2.5 in)
2001	33.5 mm (1.3 in)
2002	62.0 mm (2.4 in)
2003	35.8 mm (1.4 in)
2004	85.3 mm (3.4 in)
2005	41.9 mm (1.6 in)
2006	36.8 mm (1.4 in)
2007	16.1 mm (0.6 in)
2008	33.3 mm (1.3 in)
2009	30.5 mm (1.2 in)
2010	37.8 mm (1.5 in)
2011	39.6 mm (1.6 in)
2012	57.5 mm (2.3 in)
2013	30.7 mm (1.2 in)
2014	36.4 mm (1.4 in)
2015	68.0 mm (2.7 in)
2016	41.0 mm (1.6 in)
2017	30.5 mm (1.2 in)
2018	37.3 mm (1.5 in)
2019	40.9 mm (1.6 in)
2020	29.7 mm (1.2 in)
2021	40.2 mm (1.6 in)
2022	66.3 mm (2.6 in)
2023	41.3 mm (1.6 in)
2024	52.3 mm (2.1 in)
2025	48.9 mm (1.9 in)
2026	32.5 mm (1.3 in)

Longest dry spell (CDD)

The longest dry spell of the year at Palmer AP, 1997 to 2026. The record is 139 days in 2011, marked on the chart; the median year is 40 days.

Longest dry spell (CDD) at Palmer AP by year
Year	Longest dry spell (CDD)
1997	n/a
1998	33 days
1999	49 days
2000	49 days
2001	22 days
2002	23 days
2003	30 days
2004	38 days
2005	40 days
2006	52 days
2007	83 days
2008	48 days
2009	70 days
2010	76 days
2011	139 days
2012	41 days
2013	34 days
2014	52 days
2015	53 days
2016	41 days
2017	44 days
2018	26 days
2019	34 days
2020	25 days
2021	34 days
2022	26 days
2023	27 days
2024	45 days
2025	36 days
2026	29 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

27 years with a frost

Across 27 years with a frost, the median last spring frost at Palmer AP falls on 7 May and the median first autumn frost on 25 September, which leaves a median of 143 days between them.

Fitted over all years, the growing season changes by +4.6 days per decade at this station.

Frost dates and growing season at Palmer AP
Measure	Median, all years	Earliest period	Recent period (1998 to 2024)	Recent against earliest	Fitted trend
Last spring frost	7 May	n/a	7 May	n/a	-2.9 days per decade
First autumn frost	25 September	n/a	25 September	n/a	+1.7 days per decade
Growing days	143 days	n/a	143 days	n/a	+4.6 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 Palmer AP standing records by year: CSV or JSON. Field meanings are on the data page.
Data for Palmer 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 2026-10-13 (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).