Marion Island Weather Records (SF000068994)

Record envelope, standing records and threshold days for Marion Island (SF000068994), South Africa, with 77 years of record.

Key Facts for Marion Island

Marion Island (SF000068994) is a weather station in South Africa at -46.88 latitude and 37.87 longitude, 21 m (69 ft) above sea level.
The station reports from 1949 to 2025, 77 years of record.
1,464 records set at Marion Island still stand.
Records are tracked for tmax, tmin, prcp: an element needs 30 years of data to be eligible.
Marion Island set a daily record high maximum temperature of 12.5 C (54.5 F) on 20 August 2025.

About the Station

Location: South Africa, -46.88 latitude, 37.87 longitude.
Elevation: 21 m (69 ft).
Period of record: 1949 to 2025, 77 years.
Eligible elements: tmax, tmin, prcp.

Daily Record Envelope and 2026

9 days at or beyond a record

The band shows the record high and record low for each calendar day at Marion Island. The lines show the 2026 daily maximum and minimum. 9 days in 2026 matched or passed a record. Temperatures are in degrees Celsius.

Daily record high and record low at Marion Island, with 2026 drawn through them
Month	Highest record high	Lowest record low	2026 highest maximum	2026 lowest minimum
Jan	25.6 C (78.1 F)	-1.5 C (29.3 F)	19.6 C (67.3 F)	2.5 C (36.5 F)
Feb	22.9 C (73.2 F)	-1.4 C (29.5 F)	n/a	n/a
Mar	22.8 C (73.0 F)	-2.5 C (27.5 F)	16.7 C (62.1 F)	0.7 C (33.3 F)
Apr	23.4 C (74.1 F)	-2.2 C (28.0 F)	14.2 C (57.6 F)	0.2 C (32.4 F)
May	25.6 C (78.1 F)	-4.9 C (23.2 F)	12.4 C (54.3 F)	-1.2 C (29.8 F)
Jun	18.2 C (64.8 F)	-10.9 C (12.4 F)	14.2 C (57.6 F)	-2.9 C (26.8 F)
Jul	18.6 C (65.5 F)	-6.0 C (21.2 F)	11.3 C (52.3 F)	-2.4 C (27.7 F)
Aug	16.5 C (61.7 F)	-5.5 C (22.1 F)	12.5 C (54.5 F)	0.2 C (32.4 F)
Sep	18.6 C (65.5 F)	-12.1 C (10.2 F)	n/a	n/a
Oct	19.5 C (67.1 F)	-7.4 C (18.7 F)	n/a	n/a
Nov	20.1 C (68.2 F)	-3.9 C (25.0 F)	n/a	n/a
Dec	22.9 C (73.2 F)	-1.5 C (29.3 F)	n/a	n/a

Which Years Hold Standing Records

1,464 standing records

1,464 records at Marion Island still stand. 2024 holds the most, with 62.

Standing records at Marion Island by the year they were set
Year set	Standing records
1952	3
1953	3
1956	9
1959	6
1960	37
1961	33
1962	27
1963	25
1964	19
1965	29
1966	21
1967	28
1968	32
1969	26
1970	18
1971	20
1972	35
1973	15
1974	22
1975	30
1976	15
1977	18
1978	10
1979	18
1980	18
1981	21
1982	12
1983	11
1984	27
1985	26
1986	16
1987	19
1988	18
1989	20
1990	25
1991	19
1992	21
1993	26
1994	22
1995	19
1996	23
1997	21
1998	30
1999	17
2000	20
2001	19
2002	28
2003	22
2004	50
2005	35
2006	8
2007	18
2008	17
2009	31
2010	13
2011	27
2012	9
2013	8
2014	5
2015	16
2016	6
2017	9
2018	28
2019	20
2020	18
2021	24
2022	23
2023	25
2024	62
2025	13

All-Time Record Progression

8 new records

8 all-time records were set at Marion Island between 31 January 1990 and 24 March 2024. Each dot is a new record.

When Marion Island set new all-time records
Date	Kind	Detail
1990-01-31	Record high minimum temperature	Record high minimum temperature 11.1 C (52.0 F)
2002-06-23	Record low minimum temperature	Record low minimum temperature -10.9 C (12.4 F)
2004-09-26	Record low minimum temperature	Record low minimum temperature -12.1 C (10.2 F)
2005-01-07	Record high maximum temperature	Record high maximum temperature 24.8 C (76.6 F)
2005-01-08	Record high maximum temperature	Record high maximum temperature 25.6 C (78.1 F)
2024-01-20	Record high minimum temperature	Record high minimum temperature 11.4 C (52.5 F)
2024-02-13	Record high minimum temperature	Record high minimum temperature 13.0 C (55.4 F)
2024-03-24	Record high minimum temperature	Record high minimum temperature 13.1 C (55.6 F)

Wettest Day of Each Month

Feb: 111.0 mm (4.4 in)

The wettest day on record for each calendar month at Marion Island. The most was 111.0 mm (4.4 in) on 28 February 1985.

Record daily precipitation for each month at Marion Island
Month	Record daily precipitation (mm)	Date
Jan	99.1 mm (3.9 in)	21 January 2025
Feb	111.0 mm (4.4 in)	28 February 1985
Mar	85.1 mm (3.4 in)	22 March 2023
Apr	98.0 mm (3.9 in)	28 April 2022
May	81.0 mm (3.2 in)	4 May 1963
Jun	70.0 mm (2.8 in)	3 June 1961
Jul	71.0 mm (2.8 in)	5 July 1971
Aug	56.0 mm (2.2 in)	2 August 1984
Sep	110.0 mm (4.3 in)	28 September 1984
Oct	99.1 mm (3.9 in)	22 October 2024
Nov	99.1 mm (3.9 in)	22 November 2021
Dec	94.0 mm (3.7 in)	29 December 2021

Period of Record Coverage

1952 to 2025

71 years of record at Marion Island, 1952 to 2025. 8 years have data for under 90 percent of days and are left out of rankings: 1952, 1953, 1956, 1957, 1959, 1966, 2000, 2025.

Days with data per year at Marion Island
Year	Days with data	Share of year	Complete
1952	31	8%	No
1953	28	8%	No
1956	61	17%	No
1957	28	8%	No
1959	89	24%	No
1960	364	99%	Yes
1961	352	96%	Yes
1962	362	99%	Yes
1963	356	98%	Yes
1964	358	98%	Yes
1965	359	98%	Yes
1966	210	58%	No
1967	356	98%	Yes
1968	361	99%	Yes
1969	354	97%	Yes
1970	358	98%	Yes
1971	359	98%	Yes
1972	359	98%	Yes
1973	354	97%	Yes
1974	357	98%	Yes
1975	361	99%	Yes
1976	358	98%	Yes
1977	358	98%	Yes
1978	360	99%	Yes
1979	355	97%	Yes
1980	362	99%	Yes
1981	359	98%	Yes
1982	355	97%	Yes
1983	362	99%	Yes
1984	360	98%	Yes
1985	357	98%	Yes
1986	357	98%	Yes
1987	359	98%	Yes
1988	359	98%	Yes
1989	357	98%	Yes
1990	357	98%	Yes
1991	344	94%	Yes
1992	360	98%	Yes
1993	359	98%	Yes
1994	359	98%	Yes
1995	361	99%	Yes
1996	358	98%	Yes
1997	361	99%	Yes
1998	357	98%	Yes
1999	329	90%	Yes
2000	323	88%	No
2001	346	95%	Yes
2002	363	99%	Yes
2003	343	94%	Yes
2004	344	94%	Yes
2005	331	91%	Yes
2006	358	98%	Yes
2007	361	99%	Yes
2008	352	96%	Yes
2009	357	98%	Yes
2010	353	97%	Yes
2011	362	99%	Yes
2012	366	100%	Yes
2013	363	99%	Yes
2014	362	99%	Yes
2015	361	99%	Yes
2016	355	97%	Yes
2017	333	91%	Yes
2018	354	97%	Yes
2019	360	99%	Yes
2020	365	100%	Yes
2021	358	98%	Yes
2022	355	97%	Yes
2023	363	99%	Yes
2024	338	92%	Yes
2025	198	54%	No

Latest Records

Latest records at Marion Island
Date	Station	Record	Value	Beat old record by	Old record stood	Significance
20 August 2025	Marion Island, ZA	daily high max	12.5 C (54.5 F)	1.9 C (3.4 F)	0 years	14 of 100 (Routine)
19 August 2025	Marion Island, ZA	daily high max	12.5 C (54.5 F)	1.5 C (2.7 F)	51 years	28 of 100 (Routine)
18 August 2025	Marion Island, ZA	daily high max	12.1 C (53.8 F)	1.0 C (1.8 F)	51 years	26 of 100 (Routine)
6 August 2025	Marion Island, ZA	daily rain	18.0 mm (0.7 in)	1.0 mm (0.04 in)	31 years	17 of 100 (Routine)
5 August 2025	Marion Island, ZA	daily high min	6.4 C (43.5 F)	0.5 C (0.9 F)	58 years	26 of 100 (Routine)
4 August 2025	Marion Island, ZA	daily high min	7.6 C (45.7 F)	1.0 C (1.8 F)	14 years	15 of 100 (Routine)
4 August 2025	Marion Island, ZA	daily high max	12.0 C (53.6 F)	0.1 C (0.2 F)	16 years	11 of 100 (Routine)
15 June 2025	Marion Island, ZA	daily high max	14.2 C (57.6 F)	1.4 C (2.5 F)	28 years	20 of 100 (Routine)
14 June 2025	Marion Island, ZA	daily high max	14.2 C (57.6 F)	3.5 C (6.3 F)	23 years	26 of 100 (Routine)
19 May 2025	Marion Island, ZA	daily low min	-1.2 C (29.8 F)	0.8 C (1.4 F)	54 years	26 of 100 (Routine)
14 March 2025	Marion Island, ZA	daily low max	7.5 C (45.5 F)	0.2 C (0.4 F)	32 years	16 of 100 (Routine)
26 January 2025	Marion Island, ZA	daily high max	19.6 C (67.3 F)	1.3 C (2.3 F)	21 years	17 of 100 (Routine)
24 January 2025	Marion Island, ZA	daily high min	9.7 C (49.5 F)	0.1 C (0.2 F)	26 years	14 of 100 (Routine)
24 January 2025	Marion Island, ZA	monthly rain (Tie)	99.1 mm (3.9 in)	tie	0 years	4 of 100 (Routine)
21 January 2025	Marion Island, ZA	monthly rain	99.1 mm (3.9 in)	24.1 mm (0.9 in)	25 years	47 of 100 (Notable)
1 January 2025	Marion Island, ZA	daily high max	18.5 C (65.3 F)	0.4 C (0.7 F)	17 years	13 of 100 (Routine)
5 December 2024	Marion Island, ZA	daily low min	-0.2 C (31.6 F)	0.2 C (0.4 F)	21 years	13 of 100 (Routine)
29 November 2024	Marion Island, ZA	daily low min	0.1 C (32.2 F)	0.2 C (0.4 F)	51 years	22 of 100 (Routine)
26 November 2024	Marion Island, ZA	daily low min	-1.2 C (29.8 F)	0.8 C (1.4 F)	57 years	27 of 100 (Routine)
25 November 2024	Marion Island, ZA	daily low min (Tie)	-1.2 C (29.8 F)	tie	3 years	1 of 100 (Routine)

Climate Trend

61 complete years, 1960 to 2024

One stripe for each of 61 complete years at Marion Island, 1960 to 2024. Blue stripes are years cooler than the station's own mean of 6.2 C (43.1 F); red stripes are warmer. The coolest year was 1968, at 5.0 C (41.1 F), and the warmest was 2024, at 8.3 C (46.9 F). The strongest colour marks a difference of 2.2 C (4.0 F).

Annual mean temperature at Marion Island as warming stripes, 1960 to 2024
Year	Annual mean temperature	Difference from the station mean
1960	5.1 C	-1.11 C
1961	5.4 C	-0.72 C
1962	5.5 C	-0.63 C
1963	5.7 C	-0.48 C
1964	5.3 C	-0.85 C
1965	5.7 C	-0.44 C
1967	5.4 C	-0.72 C
1968	5.0 C	-1.13 C
1969	5.4 C	-0.81 C
1970	5.5 C	-0.67 C
1971	5.7 C	-0.47 C
1972	5.9 C	-0.28 C
1973	5.8 C	-0.37 C
1974	5.9 C	-0.27 C
1975	5.5 C	-0.62 C
1976	5.7 C	-0.45 C
1977	5.8 C	-0.40 C
1978	5.6 C	-0.56 C
1979	5.9 C	-0.30 C
1980	6.0 C	-0.20 C
1981	6.1 C	-0.07 C
1982	6.0 C	-0.18 C
1983	6.2 C	+0.06 C
1984	6.4 C	+0.23 C
1985	6.6 C	+0.43 C
1986	6.2 C	+0.07 C
1987	6.4 C	+0.20 C
1988	5.7 C	-0.45 C
1989	5.9 C	-0.22 C
1990	6.4 C	+0.21 C
1992	6.2 C	-0.01 C
1993	6.3 C	+0.12 C
1994	6.2 C	+0.08 C
1995	6.0 C	-0.13 C
1996	6.9 C	+0.71 C
1997	6.9 C	+0.75 C
1998	6.6 C	+0.45 C
2000	6.6 C	+0.43 C
2001	6.6 C	+0.39 C
2002	6.6 C	+0.43 C
2004	7.4 C	+1.23 C
2005	6.5 C	+0.30 C
2006	6.1 C	-0.04 C
2007	6.1 C	-0.05 C
2008	5.8 C	-0.41 C
2009	5.8 C	-0.34 C
2010	6.0 C	-0.14 C
2011	6.6 C	+0.43 C
2012	6.5 C	+0.38 C
2013	6.2 C	-0.01 C
2014	6.0 C	-0.12 C
2015	6.4 C	+0.27 C
2016	6.4 C	+0.28 C
2017	6.4 C	+0.20 C
2018	6.8 C	+0.64 C
2019	6.7 C	+0.55 C
2020	6.7 C	+0.51 C
2021	6.3 C	+0.18 C
2022	7.0 C	+0.82 C
2023	7.5 C	+1.31 C
2024	8.3 C	+2.14 C

The annual mean temperature here has risen by 0.2 C (0.2 to 0.3) per decade over 1960 to 2024. In Fahrenheit: 0.4 F (0.3 to 0.5) per decade. The slope is a straight line fitted to 61 complete years; the brackets give its 95 percent interval.

Fitted temperature trends per decade at Marion Island
Measure	Per decade (C)	Per decade (F)	Period	Complete years	Reading
Annual mean temperature	0.2 C (0.2 to 0.3) per decade	0.4 F (0.3 to 0.5) per decade	1960 to 2024	61	Rise
Mean daily maximum	0.4 C (0.3 to 0.5) per decade	0.7 F (0.6 to 0.9) per decade	1960 to 2024	61	Rise
Mean daily minimum	0.05 C (-0.01 to 0.11) per decade	0.09 F (-0.02 to 0.20) per decade	1960 to 2024	61	Not clearly different from zero

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

1949 to 2025

Yearly extremes at Marion Island: the record and the median year
Measure	Record	Year of the record	Median year	Years with a value
Hottest day (TXx)	25.6 C (78.1 F)	2005	19.3 C (66.7 F)	71
Coldest night (TNn)	-12.1 C (10.2 F)	2004	-3.8 C (25.2 F)	71
Wettest day (Rx1day)	111.0 mm (4.4 in)	1985	63.0 mm (2.5 in)	72
Wettest five days (Rx5day)	216.7 mm (8.5 in)	2025	108.5 mm (4.3 in)	72
Longest dry spell (CDD)	22 days	1992	4 days	72

Hottest day (TXx)

The hottest day of the year at Marion Island, 1949 to 2025. The record is 25.6 C (78.1 F) in 2005, marked on the chart; the median year is 19.3 C (66.7 F).

Hottest day (TXx) at Marion Island by year
Year	Hottest day (TXx)
1949	n/a
1952	13.9 C (57.0 F)
1953	13.3 C (55.9 F)
1956	18.2 C (64.8 F)
1957	10.2 C (50.4 F)
1959	13.8 C (56.8 F)
1960	17.7 C (63.9 F)
1961	22.2 C (72.0 F)
1962	17.8 C (64.0 F)
1963	20.4 C (68.7 F)
1964	18.0 C (64.4 F)
1965	16.8 C (62.2 F)
1966	17.2 C (63.0 F)
1967	17.6 C (63.7 F)
1968	17.5 C (63.5 F)
1969	19.5 C (67.1 F)
1970	17.9 C (64.2 F)
1971	19.7 C (67.5 F)
1972	18.8 C (65.8 F)
1973	15.5 C (59.9 F)
1974	18.3 C (64.9 F)
1975	20.2 C (68.4 F)
1976	15.5 C (59.9 F)
1977	18.0 C (64.4 F)
1978	20.8 C (69.4 F)
1979	22.8 C (73.0 F)
1980	18.4 C (65.1 F)
1981	21.8 C (71.2 F)
1982	16.3 C (61.3 F)
1983	16.9 C (62.4 F)
1984	23.8 C (74.8 F)
1985	22.9 C (73.2 F)
1986	21.6 C (70.9 F)
1987	18.4 C (65.1 F)
1988	19.4 C (66.9 F)
1989	20.0 C (68.0 F)
1990	18.8 C (65.8 F)
1991	19.6 C (67.3 F)
1992	19.3 C (66.7 F)
1993	20.8 C (69.4 F)
1994	20.5 C (68.9 F)
1995	19.2 C (66.6 F)
1996	21.9 C (71.4 F)
1997	17.3 C (63.1 F)
1998	19.3 C (66.7 F)
1999	20.8 C (69.4 F)
2000	19.2 C (66.6 F)
2001	18.6 C (65.5 F)
2002	19.2 C (66.6 F)
2003	19.9 C (67.8 F)
2004	20.5 C (68.9 F)
2005	25.6 C (78.1 F)
2006	17.9 C (64.2 F)
2007	18.3 C (64.9 F)
2008	19.3 C (66.7 F)
2009	20.3 C (68.5 F)
2010	17.3 C (63.1 F)
2011	19.6 C (67.3 F)
2012	21.9 C (71.4 F)
2013	22.2 C (72.0 F)
2014	19.4 C (66.9 F)
2015	18.4 C (65.1 F)
2016	18.0 C (64.4 F)
2017	19.8 C (67.6 F)
2018	25.6 C (78.1 F)
2019	20.1 C (68.2 F)
2020	20.5 C (68.9 F)
2021	20.8 C (69.4 F)
2022	22.9 C (73.2 F)
2023	21.7 C (71.1 F)
2024	25.1 C (77.2 F)
2025	19.6 C (67.3 F)

Coldest night (TNn)

The coldest night of the year at Marion Island, 1949 to 2025. The record is -12.1 C (10.2 F) in 2004, marked on the chart; the median year is -3.8 C (25.2 F).

Coldest night (TNn) at Marion Island by year
Year	Coldest night (TNn)
1949	n/a
1952	0.0 C (32.0 F)
1953	-2.9 C (26.8 F)
1956	-0.6 C (30.9 F)
1957	-3.3 C (26.1 F)
1959	-1.5 C (29.3 F)
1960	-5.2 C (22.6 F)
1961	-3.8 C (25.2 F)
1962	-6.4 C (20.5 F)
1963	-4.2 C (24.4 F)
1964	-6.0 C (21.2 F)
1965	-5.5 C (22.1 F)
1966	-4.0 C (24.8 F)
1967	-5.8 C (21.6 F)
1968	-4.1 C (24.6 F)
1969	-5.2 C (22.6 F)
1970	-3.6 C (25.5 F)
1971	-6.5 C (20.3 F)
1972	-5.2 C (22.6 F)
1973	-4.1 C (24.6 F)
1974	-4.1 C (24.6 F)
1975	-3.6 C (25.5 F)
1976	-4.5 C (23.9 F)
1977	-3.5 C (25.7 F)
1978	-3.7 C (25.3 F)
1979	-4.5 C (23.9 F)
1980	-4.1 C (24.6 F)
1981	-3.9 C (25.0 F)
1982	-3.4 C (25.9 F)
1983	-2.1 C (28.2 F)
1984	-5.1 C (22.8 F)
1985	-4.5 C (23.9 F)
1986	-3.3 C (26.1 F)
1987	-2.5 C (27.5 F)
1988	-4.5 C (23.9 F)
1989	-3.1 C (26.4 F)
1990	-5.5 C (22.1 F)
1991	-3.5 C (25.7 F)
1992	-3.6 C (25.5 F)
1993	-3.4 C (25.9 F)
1994	-3.6 C (25.5 F)
1995	-5.4 C (22.3 F)
1996	-2.6 C (27.3 F)
1997	-3.5 C (25.7 F)
1998	-4.6 C (23.7 F)
1999	-3.4 C (25.9 F)
2000	-3.2 C (26.2 F)
2001	-2.9 C (26.8 F)
2002	-10.9 C (12.4 F)
2003	-3.8 C (25.2 F)
2004	-12.1 C (10.2 F)
2005	-3.9 C (25.0 F)
2006	-3.5 C (25.7 F)
2007	-3.2 C (26.2 F)
2008	-3.4 C (25.9 F)
2009	-5.0 C (23.0 F)
2010	-4.0 C (24.8 F)
2011	-5.7 C (21.7 F)
2012	-3.7 C (25.3 F)
2013	-3.9 C (25.0 F)
2014	-3.7 C (25.3 F)
2015	-3.0 C (26.6 F)
2016	-3.0 C (26.6 F)
2017	-2.7 C (27.1 F)
2018	-3.3 C (26.1 F)
2019	-4.4 C (24.1 F)
2020	-3.2 C (26.2 F)
2021	-4.0 C (24.8 F)
2022	-4.0 C (24.8 F)
2023	-3.0 C (26.6 F)
2024	-4.9 C (23.2 F)
2025	-2.9 C (26.8 F)

Wettest day (Rx1day)

The wettest day of the year at Marion Island, 1949 to 2025. The record is 111.0 mm (4.4 in) in 1985, marked on the chart; the median year is 63.0 mm (2.5 in).

Wettest day (Rx1day) at Marion Island by year
Year	Wettest day (Rx1day)
1949	59.0 mm (2.3 in)
1952	69.0 mm (2.7 in)
1953	47.0 mm (1.9 in)
1956	44.0 mm (1.7 in)
1957	23.0 mm (0.9 in)
1959	67.0 mm (2.6 in)
1960	91.0 mm (3.6 in)
1961	70.0 mm (2.8 in)
1962	52.0 mm (2.0 in)
1963	86.0 mm (3.4 in)
1964	66.0 mm (2.6 in)
1965	96.0 mm (3.8 in)
1966	56.0 mm (2.2 in)
1967	87.0 mm (3.4 in)
1968	49.0 mm (1.9 in)
1969	71.0 mm (2.8 in)
1970	65.0 mm (2.6 in)
1971	71.0 mm (2.8 in)
1972	65.0 mm (2.6 in)
1973	60.0 mm (2.4 in)
1974	67.0 mm (2.6 in)
1975	63.0 mm (2.5 in)
1976	57.0 mm (2.2 in)
1977	63.0 mm (2.5 in)
1978	58.0 mm (2.3 in)
1979	53.0 mm (2.1 in)
1980	52.0 mm (2.0 in)
1981	55.0 mm (2.2 in)
1982	79.0 mm (3.1 in)
1983	53.0 mm (2.1 in)
1984	110.0 mm (4.3 in)
1985	111.0 mm (4.4 in)
1986	67.0 mm (2.6 in)
1987	56.0 mm (2.2 in)
1988	55.0 mm (2.2 in)
1989	69.0 mm (2.7 in)
1990	51.0 mm (2.0 in)
1991	67.0 mm (2.6 in)
1992	46.0 mm (1.8 in)
1993	55.0 mm (2.2 in)
1994	74.0 mm (2.9 in)
1995	59.0 mm (2.3 in)
1996	54.0 mm (2.1 in)
1997	65.0 mm (2.6 in)
1998	61.0 mm (2.4 in)
1999	57.0 mm (2.2 in)
2000	75.0 mm (3.0 in)
2001	68.0 mm (2.7 in)
2002	55.4 mm (2.2 in)
2003	76.7 mm (3.0 in)
2004	77.2 mm (3.0 in)
2005	52.3 mm (2.1 in)
2006	37.6 mm (1.5 in)
2007	47.0 mm (1.9 in)
2008	37.1 mm (1.5 in)
2009	56.4 mm (2.2 in)
2010	39.1 mm (1.5 in)
2011	54.4 mm (2.1 in)
2012	31.0 mm (1.2 in)
2013	80.0 mm (3.1 in)
2014	64.0 mm (2.5 in)
2015	51.1 mm (2.0 in)
2016	56.9 mm (2.2 in)
2017	43.9 mm (1.7 in)
2018	82.0 mm (3.2 in)
2019	63.0 mm (2.5 in)
2020	72.9 mm (2.9 in)
2021	99.1 mm (3.9 in)
2022	98.0 mm (3.9 in)
2023	85.1 mm (3.4 in)
2024	99.1 mm (3.9 in)
2025	99.1 mm (3.9 in)

Wettest five days (Rx5day)

The wettest five days of the year at Marion Island, 1949 to 2025. The record is 216.7 mm (8.5 in) in 2025, marked on the chart; the median year is 108.5 mm (4.3 in).

Wettest five days (Rx5day) at Marion Island by year
Year	Wettest five days (Rx5day)
1949	114.0 mm (4.5 in)
1952	115.0 mm (4.5 in)
1953	86.0 mm (3.4 in)
1956	91.0 mm (3.6 in)
1957	70.0 mm (2.8 in)
1959	108.0 mm (4.3 in)
1960	119.0 mm (4.7 in)
1961	167.0 mm (6.6 in)
1962	109.0 mm (4.3 in)
1963	172.0 mm (6.8 in)
1964	115.0 mm (4.5 in)
1965	144.0 mm (5.7 in)
1966	136.0 mm (5.4 in)
1967	175.0 mm (6.9 in)
1968	91.0 mm (3.6 in)
1969	130.0 mm (5.1 in)
1970	130.0 mm (5.1 in)
1971	126.0 mm (5.0 in)
1972	124.0 mm (4.9 in)
1973	116.0 mm (4.6 in)
1974	160.0 mm (6.3 in)
1975	109.0 mm (4.3 in)
1976	94.0 mm (3.7 in)
1977	101.0 mm (4.0 in)
1978	104.0 mm (4.1 in)
1979	72.0 mm (2.8 in)
1980	98.0 mm (3.9 in)
1981	136.0 mm (5.4 in)
1982	112.0 mm (4.4 in)
1983	100.0 mm (3.9 in)
1984	125.0 mm (4.9 in)
1985	138.0 mm (5.4 in)
1986	95.0 mm (3.7 in)
1987	93.0 mm (3.7 in)
1988	156.0 mm (6.1 in)
1989	105.0 mm (4.1 in)
1990	92.0 mm (3.6 in)
1991	130.0 mm (5.1 in)
1992	78.0 mm (3.1 in)
1993	111.0 mm (4.4 in)
1994	100.0 mm (3.9 in)
1995	103.0 mm (4.1 in)
1996	94.0 mm (3.7 in)
1997	106.0 mm (4.2 in)
1998	113.0 mm (4.4 in)
1999	130.0 mm (5.1 in)
2000	78.0 mm (3.1 in)
2001	97.2 mm (3.8 in)
2002	106.9 mm (4.2 in)
2003	193.0 mm (7.6 in)
2004	153.7 mm (6.1 in)
2005	86.1 mm (3.4 in)
2006	93.0 mm (3.7 in)
2007	120.1 mm (4.7 in)
2008	81.3 mm (3.2 in)
2009	98.0 mm (3.9 in)
2010	83.8 mm (3.3 in)
2011	85.6 mm (3.4 in)
2012	71.2 mm (2.8 in)
2013	153.4 mm (6.0 in)
2014	110.0 mm (4.3 in)
2015	97.0 mm (3.8 in)
2016	80.5 mm (3.2 in)
2017	57.9 mm (2.3 in)
2018	105.9 mm (4.2 in)
2019	82.1 mm (3.2 in)
2020	110.7 mm (4.4 in)
2021	114.6 mm (4.5 in)
2022	103.8 mm (4.1 in)
2023	118.6 mm (4.7 in)
2024	213.2 mm (8.4 in)
2025	216.7 mm (8.5 in)

Longest dry spell (CDD)

The longest dry spell of the year at Marion Island, 1949 to 2025. The record is 22 days in 1992, marked on the chart; the median year is 4 days.

Longest dry spell (CDD) at Marion Island by year
Year	Longest dry spell (CDD)
1949	3 days
1952	2 days
1953	2 days
1956	3 days
1957	2 days
1959	4 days
1960	4 days
1961	5 days
1962	4 days
1963	6 days
1964	5 days
1965	5 days
1966	6 days
1967	6 days
1968	3 days
1969	4 days
1970	3 days
1971	6 days
1972	5 days
1973	4 days
1974	5 days
1975	6 days
1976	3 days
1977	4 days
1978	3 days
1979	5 days
1980	3 days
1981	5 days
1982	3 days
1983	3 days
1984	5 days
1985	5 days
1986	5 days
1987	3 days
1988	6 days
1989	6 days
1990	4 days
1991	4 days
1992	22 days
1993	7 days
1994	13 days
1995	7 days
1996	5 days
1997	3 days
1998	3 days
1999	3 days
2000	2 days
2001	7 days
2002	6 days
2003	8 days
2004	7 days
2005	5 days
2006	5 days
2007	5 days
2008	4 days
2009	7 days
2010	4 days
2011	4 days
2012	4 days
2013	7 days
2014	7 days
2015	3 days
2016	6 days
2017	3 days
2018	6 days
2019	7 days
2020	4 days
2021	4 days
2022	4 days
2023	4 days
2024	4 days
2025	4 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

61 years with a frost

Across 61 years with a frost, the median last spring frost at Marion Island falls on 28 November and the median first autumn frost on 11 April, which leaves a median of 123 days between them.

In 1993 to 2024 the median growing season was 126 days. That is 5 days more than in 1960 to 1990.

Fitted over all years, the growing season changes by +4.1 days per decade at this station.

Frost dates and growing season at Marion Island
Measure	Median, all years	Earliest period (1960 to 1990)	Recent period (1993 to 2024)	Recent against earliest	Fitted trend
Last spring frost	28 November	1 December	26 November	5 days earlier	-1.8 days per decade
First autumn frost	11 April	10 April	13 April	3 days later	+2.3 days per decade
Growing days	123 days	121 days	126 days	5 days more	+4.1 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.

Rainfall Return Levels

38 years, 1960 to 2013

A day with at least 62.9 mm (2.5 in) of rain is expected about once in 2 years. A day with at least 121.5 mm (4.8 in) of rain is expected about once in 100 years.

Rainfall return levels at Marion Island: the daily rain expected about once in a given number of years
Expected about once in	A day with at least	Note
2 years	62.9 mm (2.5 in)
5 years	78.7 mm (3.1 in)
10 years	89.1 mm (3.5 in)
25 years	102.2 mm (4.0 in)
50 years	111.9 mm (4.4 in)	Longer than the 38 years of record
100 years	121.5 mm (4.8 in)	Longer than the 38 years of record

The levels come from a generalised extreme value (GEV) distribution fitted by L-moments to the wettest-day total of each year, 38 years of values from 1960 to 2013.

A return level is an estimate. It is least reliable for the long periods, 50 and 100 years, and for any period longer than the record behind the fit, where the fit has to reach past the largest day actually observed. It is not a forecast.

The largest wettest-day totals in the fit: 111.0 mm (4.4 in) in 1985; 110.0 mm (4.3 in) in 1984; 96.0 mm (3.8 in) in 1965.

Download the Data

Data for Marion Island standing records by year: CSV or JSON. Field meanings are on the data page.
Data for Marion Island 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 2026-10-17 (17 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).