Round Lake Alaska Weather Records (USR0000AROU)

Record envelope, standing records and threshold days for Round Lake Alaska (USR0000AROU), Alaska, United States, with 32 years of record.

Key Facts for Round Lake Alaska

Round Lake Alaska (USR0000AROU) is a weather station in Alaska, United States at 64.68 latitude and -153.94 longitude, 174 m (570 ft) above sea level.
The station reports from 1992 to 2023, 32 years of record.
1,464 records set at Round Lake Alaska still stand.
Records are tracked for tmax, tmin: an element needs 30 years of data to be eligible.
Round Lake Alaska set a daily record low minimum temperature of -10.0 C (14.0 F) on 2 October 2026 (provisional).

Provisional Records

Records set in the last 60 days are provisional until they clear the revision window.

About the Station

Location: Alaska, United States, 64.68 latitude, -153.94 longitude.
Elevation: 174 m (570 ft).
Period of record: 1992 to 2023, 32 years.
Eligible elements: tmax, tmin.

Daily Record Envelope and 2026

18 days at or beyond a record

The band shows the record high and record low for each calendar day at Round Lake Alaska. The lines show the 2026 daily maximum and minimum. 18 days in 2026 matched or passed a record. Temperatures are in degrees Celsius.

Daily record high and record low at Round Lake Alaska, with 2026 drawn through them
Month	Highest record high	Lowest record low	2026 highest maximum	2026 lowest minimum
Jan	5.0 C (41.0 F)	-48.9 C (-56.0 F)	-6.1 C (21.0 F)	-46.1 C (-51.0 F)
Feb	8.9 C (48.0 F)	-49.4 C (-56.9 F)	-1.7 C (28.9 F)	-41.1 C (-42.0 F)
Mar	15.0 C (59.0 F)	-39.4 C (-38.9 F)	5.0 C (41.0 F)	-38.9 C (-38.0 F)
Apr	20.0 C (68.0 F)	-30.6 C (-23.1 F)	15.6 C (60.1 F)	-19.4 C (-2.9 F)
May	32.2 C (90.0 F)	-17.8 C (0.0 F)	19.4 C (66.9 F)	-5.6 C (21.9 F)
Jun	33.9 C (93.0 F)	-3.3 C (26.1 F)	28.9 C (84.0 F)	0.0 C (32.0 F)
Jul	33.9 C (93.0 F)	-6.1 C (21.0 F)	27.2 C (81.0 F)	3.3 C (37.9 F)
Aug	32.8 C (91.0 F)	-13.9 C (7.0 F)	28.3 C (82.9 F)	-1.1 C (30.0 F)
Sep	25.0 C (77.0 F)	-17.2 C (1.0 F)	17.8 C (64.0 F)	-4.4 C (24.1 F)
Oct	20.6 C (69.1 F)	-30.6 C (-23.1 F)	7.2 C (45.0 F)	-10.0 C (14.0 F)
Nov	6.7 C (44.1 F)	-45.6 C (-50.1 F)	n/a	n/a
Dec	6.1 C (43.0 F)	-48.9 C (-56.0 F)	n/a	n/a

Which Years Hold Standing Records

1,464 standing records

1,464 records at Round Lake Alaska still stand. 2010 holds the most, with 91.

Standing records at Round Lake Alaska by the year they were set
Year set	Standing records
1992	54
1993	81
1994	71
1995	36
1996	52
1997	18
1998	28
1999	55
2000	50
2001	40
2002	62
2003	66
2004	70
2005	49
2006	27
2007	54
2008	22
2009	34
2010	91
2011	23
2012	14
2013	64
2014	24
2015	44
2016	28
2017	53
2018	19
2019	35
2020	30
2021	43
2022	10
2023	27
2024	33
2025	31
2026	26

Period of Record Coverage

1992 to 2026

35 years of record at Round Lake Alaska, 1992 to 2026. 9 years have data for under 90 percent of days and are left out of rankings: 1992, 1995, 1997, 2008, 2009, 2011, 2012, 2019 and others.

Days with data per year at Round Lake Alaska
Year	Days with data	Share of year	Complete
1992	141	39%	No
1993	348	95%	Yes
1994	353	97%	Yes
1995	207	57%	No
1996	355	97%	Yes
1997	204	56%	No
1998	362	99%	Yes
1999	364	100%	Yes
2000	361	99%	Yes
2001	362	99%	Yes
2002	361	99%	Yes
2003	362	99%	Yes
2004	361	99%	Yes
2005	363	99%	Yes
2006	364	100%	Yes
2007	362	99%	Yes
2008	166	45%	No
2009	236	65%	No
2010	360	99%	Yes
2011	174	48%	No
2012	231	63%	No
2013	362	99%	Yes
2014	362	99%	Yes
2015	362	99%	Yes
2016	352	96%	Yes
2017	360	99%	Yes
2018	362	99%	Yes
2019	320	88%	No
2020	364	99%	Yes
2021	362	99%	Yes
2022	362	99%	Yes
2023	343	94%	Yes
2024	354	97%	Yes
2025	364	100%	Yes
2026	282	77%	No

Latest Records

Latest records at Round Lake Alaska
Date	Station	Record	Value	Beat old record by	Old record stood	Significance
2 October 2026	Round Lake Alaska, US	daily low min (Provisional)	-10.0 C (14.0 F)	0.6 C (1.1 F)	25 years	10 of 100 (Routine)
1 October 2026	Round Lake Alaska, US	daily low max (Tie, Provisional)	0.0 C (32.0 F)	tie	33 years	3 of 100 (Routine)
11 September 2026	Round Lake Alaska, US	daily high min (Provisional)	8.3 C (46.9 F)	1.1 C (2.0 F)	20 years	11 of 100 (Routine)
10 September 2026	Round Lake Alaska, US	daily high min (Provisional)	8.3 C (46.9 F)	0.5 C (0.9 F)	20 years	10 of 100 (Routine)
7 September 2026	Round Lake Alaska, US	daily high min (Provisional)	9.4 C (48.9 F)	0.5 C (0.9 F)	28 years	12 of 100 (Routine)
3 September 2026	Round Lake Alaska, US	daily low max (Provisional)	8.3 C (46.9 F)	0.6 C (1.1 F)	20 years	10 of 100 (Routine)
16 August 2026	Round Lake Alaska, US	daily high min (Provisional)	15.0 C (59.0 F)	2.2 C (4.0 F)	21 years	14 of 100 (Routine)
12 August 2026	Round Lake Alaska, US	daily high max	26.7 C (80.1 F)	0.6 C (1.1 F)	20 years	10 of 100 (Routine)
13 July 2026	Round Lake Alaska, US	daily low max	13.9 C (57.0 F)	1.1 C (2.0 F)	1 year	5 of 100 (Routine)
1 July 2026	Round Lake Alaska, US	daily low min	5.0 C (41.0 F)	2.2 C (4.0 F)	25 years	17 of 100 (Routine)
9 June 2026	Round Lake Alaska, US	daily low min (Tie)	0.0 C (32.0 F)	tie	0 years	0 of 100 (Routine)
8 June 2026	Round Lake Alaska, US	daily low max	8.9 C (48.0 F)	1.7 C (3.1 F)	24 years	13 of 100 (Routine)
6 May 2026	Round Lake Alaska, US	daily low max (Tie)	5.6 C (42.1 F)	tie	24 years	2 of 100 (Routine)
22 April 2026	Round Lake Alaska, US	daily low min	-19.4 C (-2.9 F)	6.6 C (11.9 F)	24 years	19 of 100 (Routine)
22 April 2026	Round Lake Alaska, US	daily low max	-1.7 C (28.9 F)	2.8 C (5.0 F)	3 years	7 of 100 (Routine)
21 April 2026	Round Lake Alaska, US	daily low max	-5.6 C (21.9 F)	7.3 C (13.1 F)	8 years	16 of 100 (Routine)
21 April 2026	Round Lake Alaska, US	daily low min	-16.1 C (3.0 F)	4.4 C (7.9 F)	12 years	12 of 100 (Routine)
19 April 2026	Round Lake Alaska, US	daily low max	-2.8 C (27.0 F)	1.1 C (2.0 F)	20 years	10 of 100 (Routine)
19 March 2026	Round Lake Alaska, US	daily low min	-35.0 C (-31.0 F)	1.7 C (3.1 F)	32 years	14 of 100 (Routine)
18 March 2026	Round Lake Alaska, US	daily low min	-32.8 C (-27.0 F)	5.0 C (9.0 F)	32 years	18 of 100 (Routine)

Climate Trend

25 complete years, 1993 to 2025

One stripe for each of 25 complete years at Round Lake Alaska, 1993 to 2025. Blue stripes are years cooler than the station's own mean of -1.8 C (28.8 F); red stripes are warmer. The coolest year was 1999, at -4.3 C (24.2 F), and the warmest was 2016, at 0.4 C (32.6 F). The strongest colour marks a difference of 2.6 C (4.7 F).

Annual mean temperature at Round Lake Alaska as warming stripes, 1993 to 2025
Year	Annual mean temperature	Difference from the station mean
1993	-0.2 C	+1.56 C
1994	-2.8 C	-1.09 C
1996	-4.1 C	-2.38 C
1998	-1.6 C	+0.19 C
1999	-4.3 C	-2.56 C
2000	-1.6 C	+0.20 C
2001	-2.3 C	-0.53 C
2002	-0.6 C	+1.18 C
2003	-1.3 C	+0.45 C
2004	-1.1 C	+0.69 C
2005	-1.2 C	+0.51 C
2006	-3.1 C	-1.35 C
2007	-2.0 C	-0.20 C
2010	-4.0 C	-2.24 C
2013	-2.3 C	-0.55 C
2014	-0.3 C	+1.49 C
2015	-0.5 C	+1.28 C
2016	0.4 C	+2.12 C
2017	-0.7 C	+1.05 C
2018	-0.4 C	+1.37 C
2020	-2.4 C	-0.68 C
2021	-2.9 C	-1.11 C
2022	-1.6 C	+0.18 C
2024	-1.9 C	-0.16 C
2025	-1.2 C	+0.58 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

1992 to 2026

Yearly extremes at Round Lake Alaska: the record and the median year
Measure	Record	Year of the record	Median year	Years with a value
Hottest day (TXx)	33.9 C (93.0 F)	2009	31.1 C (88.0 F)	35
Coldest night (TNn)	-49.4 C (-56.9 F)	1999	-43.3 C (-45.9 F)	35

Hottest day (TXx)

The hottest day of the year at Round Lake Alaska, 1992 to 2026. The record is 33.9 C (93.0 F) in 2009, marked on the chart; the median year is 31.1 C (88.0 F).

Hottest day (TXx) at Round Lake Alaska by year
Year	Hottest day (TXx)
1992	22.2 C (72.0 F)
1993	32.8 C (91.0 F)
1994	31.7 C (89.1 F)
1995	29.4 C (84.9 F)
1996	29.4 C (84.9 F)
1997	31.1 C (88.0 F)
1998	31.1 C (88.0 F)
1999	32.2 C (90.0 F)
2000	31.1 C (88.0 F)
2001	29.4 C (84.9 F)
2002	32.2 C (90.0 F)
2003	31.1 C (88.0 F)
2004	32.8 C (91.0 F)
2005	30.0 C (86.0 F)
2006	27.8 C (82.0 F)
2007	31.1 C (88.0 F)
2008	25.0 C (77.0 F)
2009	33.9 C (93.0 F)
2010	29.4 C (84.9 F)
2011	30.0 C (86.0 F)
2012	29.4 C (84.9 F)
2013	33.9 C (93.0 F)
2014	31.7 C (89.1 F)
2015	33.3 C (91.9 F)
2016	33.3 C (91.9 F)
2017	31.7 C (89.1 F)
2018	32.2 C (90.0 F)
2019	29.4 C (84.9 F)
2020	27.8 C (82.0 F)
2021	31.1 C (88.0 F)
2022	30.0 C (86.0 F)
2023	32.8 C (91.0 F)
2024	32.2 C (90.0 F)
2025	32.2 C (90.0 F)
2026	28.9 C (84.0 F)

Coldest night (TNn)

The coldest night of the year at Round Lake Alaska, 1992 to 2026. The record is -49.4 C (-56.9 F) in 1999, marked on the chart; the median year is -43.3 C (-45.9 F).

Coldest night (TNn) at Round Lake Alaska by year
Year	Coldest night (TNn)
1992	-42.2 C (-44.0 F)
1993	-48.9 C (-56.0 F)
1994	-45.6 C (-50.1 F)
1995	-41.7 C (-43.1 F)
1996	-44.4 C (-47.9 F)
1997	-38.3 C (-36.9 F)
1998	-43.9 C (-47.0 F)
1999	-49.4 C (-56.9 F)
2000	-48.3 C (-54.9 F)
2001	-43.9 C (-47.0 F)
2002	-42.2 C (-44.0 F)
2003	-43.3 C (-45.9 F)
2004	-43.3 C (-45.9 F)
2005	-45.0 C (-49.0 F)
2006	-45.6 C (-50.1 F)
2007	-42.8 C (-45.0 F)
2008	-43.3 C (-45.9 F)
2009	-43.3 C (-45.9 F)
2010	-44.4 C (-47.9 F)
2011	-43.3 C (-45.9 F)
2012	-43.9 C (-47.0 F)
2013	-43.3 C (-45.9 F)
2014	-37.8 C (-36.0 F)
2015	-41.1 C (-42.0 F)
2016	-39.4 C (-38.9 F)
2017	-47.2 C (-53.0 F)
2018	-44.4 C (-47.9 F)
2019	-45.6 C (-50.1 F)
2020	-43.9 C (-47.0 F)
2021	-40.6 C (-41.1 F)
2022	-37.2 C (-35.0 F)
2023	-38.9 C (-38.0 F)
2024	-47.8 C (-54.0 F)
2025	-41.1 C (-42.0 F)
2026	-46.1 C (-51.0 F)

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 Round Lake Alaska falls on 20 May and the median first autumn frost on 30 August, which leaves a median of 99 days between them.

Fitted over all years, the growing season changes by +4.3 days per decade at this station.

Frost dates and growing season at Round Lake Alaska
Measure	Median, all years	Earliest period	Recent period (1993 to 2025)	Recent against earliest	Fitted trend
Last spring frost	20 May	n/a	20 May	n/a	+0.6 days per decade
First autumn frost	30 August	n/a	30 August	n/a	+4.9 days per decade
Growing days	99 days	n/a	99 days	n/a	+4.3 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 Round Lake Alaska standing records by year: CSV or JSON. Field meanings are on the data page.
Data for Round Lake Alaska 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 2026-10-14. Last revised 14 October 2026 (2026-10-14).