Ft Knox Mine Weather Records (USC00503160)

Record envelope, standing records and threshold days for Ft Knox Mine (USC00503160), Alaska, United States, with 30 years of record.

Key Facts for Ft Knox Mine

Ft Knox Mine (USC00503160) is a weather station in Alaska, United States at 65.00 latitude and -147.34 longitude, 494 m (1,621 ft) above sea level.
The station reports from 1997 to 2026, 30 years of record.
1,464 records set at Ft Knox Mine 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, 65.00 latitude, -147.34 longitude.
Elevation: 494 m (1,621 ft).
Period of record: 1997 to 2026, 30 years.
Eligible elements: none yet.

Daily Record Envelope and 2026

29 days at or beyond a record

The band shows the record high and record low for each calendar day at Ft Knox Mine. The lines show the 2026 daily maximum and minimum. 29 days in 2026 matched or passed a record. Temperatures are in degrees Celsius.

Daily record high and record low at Ft Knox Mine, with 2026 drawn through them
Month	Highest record high	Lowest record low	2026 highest maximum	2026 lowest minimum
Jan	10.6 C (51.1 F)	-41.7 C (-43.1 F)	6.7 C (44.1 F)	-30.0 C (-22.0 F)
Feb	8.9 C (48.0 F)	-38.3 C (-36.9 F)	3.9 C (39.0 F)	-21.1 C (-6.0 F)
Mar	10.0 C (50.0 F)	-33.3 C (-27.9 F)	6.1 C (43.0 F)	-20.6 C (-5.1 F)
Apr	21.1 C (70.0 F)	-28.3 C (-18.9 F)	10.0 C (50.0 F)	-14.4 C (6.1 F)
May	30.0 C (86.0 F)	-12.2 C (10.0 F)	15.6 C (60.1 F)	-2.2 C (28.0 F)
Jun	31.7 C (89.1 F)	-4.4 C (24.1 F)	27.8 C (82.0 F)	3.3 C (37.9 F)
Jul	30.0 C (86.0 F)	0.0 C (32.0 F)	28.3 C (82.9 F)	4.4 C (39.9 F)
Aug	30.0 C (86.0 F)	-3.3 C (26.1 F)	22.8 C (73.0 F)	-3.3 C (26.1 F)
Sep	22.8 C (73.0 F)	-11.7 C (10.9 F)	17.2 C (63.0 F)	-11.7 C (10.9 F)
Oct	20.0 C (68.0 F)	-23.3 C (-9.9 F)	10.0 C (50.0 F)	-15.6 C (3.9 F)
Nov	8.3 C (46.9 F)	-32.2 C (-26.0 F)	-0.6 C (30.9 F)	-18.9 C (-2.0 F)
Dec	7.2 C (45.0 F)	-37.8 C (-36.0 F)	-0.6 C (30.9 F)	-33.9 C (-29.0 F)

Which Years Hold Standing Records

1,464 standing records

1,464 records at Ft Knox Mine still stand. 2002 holds the most, with 93.

Standing records at Ft Knox Mine by the year they were set
Year set	Standing records
2000	58
2001	67
2002	93
2003	88
2004	82
2005	64
2006	61
2007	79
2008	61
2009	76
2010	35
2011	36
2012	42
2013	79
2014	72
2015	58
2016	51
2017	36
2018	25
2019	51
2020	41
2021	61
2022	20
2023	29
2024	57
2025	42

Wettest Day of Each Month

Jun: 73.7 mm (2.9 in)

The wettest day on record for each calendar month at Ft Knox Mine. The most was 73.7 mm (2.9 in) on 13 June 2011.

Record daily precipitation for each month at Ft Knox Mine
Month	Record daily precipitation (mm)	Date
Jan	17.8 mm (0.7 in)	4 January 2005
Feb	15.2 mm (0.6 in)	5 February 2004
Mar	24.9 mm (1.0 in)	23 March 2020
Apr	20.3 mm (0.8 in)	4 April 2021
May	61.0 mm (2.4 in)	29 May 2023
Jun	73.7 mm (2.9 in)	13 June 2011
Jul	63.5 mm (2.5 in)	27 July 2003
Aug	48.8 mm (1.9 in)	24 August 2025
Sep	38.1 mm (1.5 in)	10 September 2023
Oct	44.5 mm (1.8 in)	21 October 2024
Nov	25.4 mm (1.0 in)	3 November 2022
Dec	42.7 mm (1.7 in)	26 December 2021

Period of Record Coverage

2000 to 2025

26 years of record at Ft Knox Mine, 2000 to 2025. 4 years have data for under 90 percent of days and are left out of rankings: 2000, 2001, 2006, 2007.

Days with data per year at Ft Knox Mine
Year	Days with data	Share of year	Complete
2000	244	67%	No
2001	295	81%	No
2002	356	98%	Yes
2003	351	96%	Yes
2004	350	96%	Yes
2005	357	98%	Yes
2006	325	89%	No
2007	295	81%	No
2008	330	90%	Yes
2009	364	100%	Yes
2010	364	100%	Yes
2011	358	98%	Yes
2012	362	99%	Yes
2013	333	91%	Yes
2014	363	99%	Yes
2015	365	100%	Yes
2016	366	100%	Yes
2017	363	99%	Yes
2018	365	100%	Yes
2019	365	100%	Yes
2020	365	100%	Yes
2021	365	100%	Yes
2022	363	99%	Yes
2023	362	99%	Yes
2024	364	99%	Yes
2025	358	98%	Yes

Latest Records

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

Climate Trend

20 complete years, 2002 to 2025

One stripe for each of 20 complete years at Ft Knox Mine, 2002 to 2025. Blue stripes are years cooler than the station's own mean of -0.6 C (30.9 F); red stripes are warmer. The coolest year was 2012, at -2.6 C (27.3 F), and the warmest was 2016, at 1.5 C (34.8 F). The strongest colour marks a difference of 2.2 C (4.0 F).

Annual mean temperature at Ft Knox Mine as warming stripes, 2002 to 2025
Year	Annual mean temperature	Difference from the station mean
2002	-0.1 C	+0.52 C
2003	-0.9 C	-0.29 C
2004	-0.5 C	+0.12 C
2005	-0.8 C	-0.22 C
2009	-1.1 C	-0.52 C
2010	-0.5 C	+0.12 C
2011	-1.2 C	-0.57 C
2012	-2.6 C	-1.97 C
2014	0.5 C	+1.15 C
2015	0.5 C	+1.10 C
2016	1.5 C	+2.16 C
2017	0.0 C	+0.66 C
2018	-0.1 C	+0.54 C
2019	1.0 C	+1.67 C
2020	-2.0 C	-1.39 C
2021	-2.3 C	-1.67 C
2022	-1.1 C	-0.49 C
2023	-0.9 C	-0.32 C
2024	-1.4 C	-0.75 C
2025	-0.5 C	+0.11 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 Ft Knox Mine: the record and the median year
Measure	Record	Year of the record	Median year	Years with a value
Hottest day (TXx)	31.7 C (89.1 F)	2013	28.3 C (82.9 F)	27
Coldest night (TNn)	-41.7 C (-43.1 F)	2006	-34.4 C (-29.9 F)	27
Wettest day (Rx1day)	73.7 mm (2.9 in)	2011	32.2 mm (1.3 in)	30
Wettest five days (Rx5day)	120.2 mm (4.7 in)	2021	63.3 mm (2.5 in)	30
Longest dry spell (CDD)	107 days	2000	31 days	30

Hottest day (TXx)

The hottest day of the year at Ft Knox Mine, 1997 to 2026. The record is 31.7 C (89.1 F) in 2013, marked on the chart; the median year is 28.3 C (82.9 F).

Hottest day (TXx) at Ft Knox Mine by year
Year	Hottest day (TXx)
1997	n/a
1998	n/a
1999	n/a
2000	27.8 C (82.0 F)
2001	25.6 C (78.1 F)
2002	30.0 C (86.0 F)
2003	29.4 C (84.9 F)
2004	31.1 C (88.0 F)
2005	27.8 C (82.0 F)
2006	28.9 C (84.0 F)
2007	27.8 C (82.0 F)
2008	26.1 C (79.0 F)
2009	29.4 C (84.9 F)
2010	30.0 C (86.0 F)
2011	26.7 C (80.1 F)
2012	27.2 C (81.0 F)
2013	31.7 C (89.1 F)
2014	25.6 C (78.1 F)
2015	29.4 C (84.9 F)
2016	28.9 C (84.0 F)
2017	27.8 C (82.0 F)
2018	28.3 C (82.9 F)
2019	28.3 C (82.9 F)
2020	23.9 C (75.0 F)
2021	27.8 C (82.0 F)
2022	28.3 C (82.9 F)
2023	29.4 C (84.9 F)
2024	28.3 C (82.9 F)
2025	28.3 C (82.9 F)
2026	25.6 C (78.1 F)

Coldest night (TNn)

The coldest night of the year at Ft Knox Mine, 1997 to 2026. The record is -41.7 C (-43.1 F) in 2006, marked on the chart; the median year is -34.4 C (-29.9 F).

Coldest night (TNn) at Ft Knox Mine by year
Year	Coldest night (TNn)
1997	n/a
1998	n/a
1999	n/a
2000	-28.9 C (-20.0 F)
2001	-37.8 C (-36.0 F)
2002	-41.1 C (-42.0 F)
2003	-34.4 C (-29.9 F)
2004	-38.9 C (-38.0 F)
2005	-38.3 C (-36.9 F)
2006	-41.7 C (-43.1 F)
2007	-36.7 C (-34.1 F)
2008	-32.8 C (-27.0 F)
2009	-35.6 C (-32.1 F)
2010	-30.6 C (-23.1 F)
2011	-33.9 C (-29.0 F)
2012	-35.6 C (-32.1 F)
2013	-35.0 C (-31.0 F)
2014	-28.9 C (-20.0 F)
2015	-34.4 C (-29.9 F)
2016	-28.3 C (-18.9 F)
2017	-37.2 C (-35.0 F)
2018	-32.8 C (-27.0 F)
2019	-35.6 C (-32.1 F)
2020	-32.8 C (-27.0 F)
2021	-32.2 C (-26.0 F)
2022	-30.0 C (-22.0 F)
2023	-30.0 C (-22.0 F)
2024	-40.0 C (-40.0 F)
2025	-33.9 C (-29.0 F)
2026	-33.9 C (-29.0 F)

Wettest day (Rx1day)

The wettest day of the year at Ft Knox Mine, 1997 to 2026. The record is 73.7 mm (2.9 in) in 2011, marked on the chart; the median year is 32.2 mm (1.3 in).

Wettest day (Rx1day) at Ft Knox Mine by year
Year	Wettest day (Rx1day)
1997	3.0 mm (0.12 in)
1998	32.5 mm (1.3 in)
1999	22.9 mm (0.9 in)
2000	36.3 mm (1.4 in)
2001	30.5 mm (1.2 in)
2002	38.6 mm (1.5 in)
2003	63.5 mm (2.5 in)
2004	22.9 mm (0.9 in)
2005	24.1 mm (0.9 in)
2006	13.7 mm (0.5 in)
2007	40.6 mm (1.6 in)
2008	30.5 mm (1.2 in)
2009	25.9 mm (1.0 in)
2010	15.5 mm (0.6 in)
2011	73.7 mm (2.9 in)
2012	26.9 mm (1.1 in)
2013	20.3 mm (0.8 in)
2014	44.2 mm (1.7 in)
2015	36.1 mm (1.4 in)
2016	41.9 mm (1.6 in)
2017	31.8 mm (1.3 in)
2018	36.1 mm (1.4 in)
2019	29.7 mm (1.2 in)
2020	27.2 mm (1.1 in)
2021	42.7 mm (1.7 in)
2022	25.4 mm (1.0 in)
2023	61.0 mm (2.4 in)
2024	44.5 mm (1.8 in)
2025	48.8 mm (1.9 in)
2026	41.1 mm (1.6 in)

Wettest five days (Rx5day)

The wettest five days of the year at Ft Knox Mine, 1997 to 2026. The record is 120.2 mm (4.7 in) in 2021, marked on the chart; the median year is 63.3 mm (2.5 in).

Wettest five days (Rx5day) at Ft Knox Mine by year
Year	Wettest five days (Rx5day)
1997	8.7 mm (0.34 in)
1998	47.6 mm (1.9 in)
1999	58.3 mm (2.3 in)
2000	87.3 mm (3.4 in)
2001	37.0 mm (1.5 in)
2002	87.6 mm (3.4 in)
2003	109.4 mm (4.3 in)
2004	47.1 mm (1.9 in)
2005	58.3 mm (2.3 in)
2006	18.0 mm (0.7 in)
2007	51.3 mm (2.0 in)
2008	94.3 mm (3.7 in)
2009	46.3 mm (1.8 in)
2010	33.5 mm (1.3 in)
2011	95.3 mm (3.8 in)
2012	51.6 mm (2.0 in)
2013	43.6 mm (1.7 in)
2014	81.1 mm (3.2 in)
2015	79.3 mm (3.1 in)
2016	96.8 mm (3.8 in)
2017	46.3 mm (1.8 in)
2018	68.3 mm (2.7 in)
2019	62.5 mm (2.5 in)
2020	55.9 mm (2.2 in)
2021	120.2 mm (4.7 in)
2022	64.0 mm (2.5 in)
2023	102.7 mm (4.0 in)
2024	74.2 mm (2.9 in)
2025	72.4 mm (2.9 in)
2026	65.0 mm (2.6 in)

Longest dry spell (CDD)

The longest dry spell of the year at Ft Knox Mine, 1997 to 2026. The record is 107 days in 2000, marked on the chart; the median year is 31 days.

Longest dry spell (CDD) at Ft Knox Mine by year
Year	Longest dry spell (CDD)
1997	5 days
1998	31 days
1999	23 days
2000	107 days
2001	42 days
2002	23 days
2003	31 days
2004	37 days
2005	20 days
2006	27 days
2007	30 days
2008	23 days
2009	21 days
2010	52 days
2011	29 days
2012	30 days
2013	32 days
2014	31 days
2015	28 days
2016	38 days
2017	31 days
2018	20 days
2019	22 days
2020	32 days
2021	22 days
2022	35 days
2023	34 days
2024	32 days
2025	52 days
2026	32 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

20 years with a frost

Across 20 years with a frost, the median last spring frost at Ft Knox Mine falls on 17 May and the median first autumn frost on 16 September, which leaves a median of 118 days between them.

Frost dates and growing season at Ft Knox Mine
Measure	Median, all years	Earliest period	Recent period (2002 to 2025)	Recent against earliest	Fitted trend
Last spring frost	17 May	n/a	17 May	n/a	n/a
First autumn frost	16 September	n/a	16 September	n/a	n/a
Growing days	118 days	n/a	118 days	n/a	n/a

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 Ft Knox Mine standing records by year: CSV or JSON. Field meanings are on the data page.
Data for Ft Knox Mine 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).