Ilulissat (Jakobshavn) Weather Records (GLE00100981)

Record envelope, standing records and threshold days for Ilulissat (Jakobshavn) (GLE00100981), Greenland [Denmark], with 88 years of record.

Key Facts for Ilulissat (Jakobshavn)

Ilulissat (Jakobshavn) (GLE00100981) is a weather station in Greenland [Denmark] at 69.22 latitude and -51.05 longitude, 39 m (128 ft) above sea level.
The station reports from 1873 to 1960, 88 years of record.
1,464 records set at Ilulissat (Jakobshavn) still stand.
Records are tracked for tmax, tmin, prcp: an element needs 30 years of data to be eligible.
Ilulissat (Jakobshavn) set a daily record high maximum temperature of 4.7 C (40.5 F) on 8 December 1960.

About the Station

Location: Greenland [Denmark], 69.22 latitude, -51.05 longitude.
Elevation: 39 m (128 ft).
Period of record: 1873 to 1960, 88 years.
Eligible elements: tmax, tmin, prcp.

Daily Record Envelope and 2026

0 days at or beyond a record

The band shows the record high and record low for each calendar day at Ilulissat (Jakobshavn). The lines show the 2026 daily maximum and minimum. 0 days in 2026 matched or passed a record. Temperatures are in degrees Celsius.

Daily record high and record low at Ilulissat (Jakobshavn), with 2026 drawn through them
Month	Highest record high	Lowest record low	2026 highest maximum	2026 lowest minimum
Jan	15.1 C (59.2 F)	-42.7 C (-44.9 F)	n/a	n/a
Feb	9.1 C (48.4 F)	-43.2 C (-45.8 F)	n/a	n/a
Mar	10.4 C (50.7 F)	-41.3 C (-42.3 F)	n/a	n/a
Apr	12.7 C (54.9 F)	-37.0 C (-34.6 F)	n/a	n/a
May	17.1 C (62.8 F)	-23.3 C (-9.9 F)	n/a	n/a
Jun	20.8 C (69.4 F)	-6.3 C (20.7 F)	n/a	n/a
Jul	21.9 C (71.4 F)	-2.1 C (28.2 F)	n/a	n/a
Aug	19.8 C (67.6 F)	-4.5 C (23.9 F)	n/a	n/a
Sep	20.2 C (68.4 F)	-13.1 C (8.4 F)	n/a	n/a
Oct	14.9 C (58.8 F)	-21.3 C (-6.3 F)	n/a	n/a
Nov	12.1 C (53.8 F)	-27.7 C (-17.9 F)	n/a	n/a
Dec	11.1 C (52.0 F)	-36.5 C (-33.7 F)	n/a	n/a

Which Years Hold Standing Records

1,464 standing records

1,464 records at Ilulissat (Jakobshavn) still stand. 1898 holds the most, with 63.

Standing records at Ilulissat (Jakobshavn) by the year they were set
Year set	Standing records
1873	4
1874	22
1875	27
1876	11
1877	19
1878	26
1879	19
1880	2
1881	12
1882	5
1883	13
1884	31
1885	9
1886	13
1887	18
1888	21
1889	9
1890	8
1891	9
1892	11
1893	7
1894	21
1895	22
1896	53
1897	20
1898	63
1899	21
1900	14
1901	26
1902	8
1903	29
1904	17
1905	14
1906	17
1907	13
1908	32
1909	16
1910	33
1911	22
1912	11
1913	12
1914	28
1915	15
1916	25
1917	4
1918	26
1919	31
1920	8
1921	7
1922	15
1923	9
1924	5
1925	14
1926	4
1927	9
1928	22
1929	41
1930	25
1931	4
1932	26
1933	15
1934	6
1935	7
1936	7
1937	8
1938	4
1939	20
1940	13
1941	20
1942	9
1943	12
1944	23
1945	16
1946	25
1947	18
1948	11
1949	21
1950	6
1951	10
1952	13
1953	15
1954	14
1955	16
1956	23
1957	11
1958	6
1959	12
1960	25

All-Time Record Progression

4 new records

4 all-time records were set at Ilulissat (Jakobshavn) between 6 July 1908 and 14 June 1942. Each dot is a new record.

When Ilulissat (Jakobshavn) set new all-time records
Date	Kind	Detail
1908-07-06	Record high minimum temperature	Record high minimum temperature 14.7 C (58.5 F)
1908-07-07	Record high minimum temperature	Record high minimum temperature 14.9 C (58.8 F)
1917-04-01	Record daily precipitation	Record daily precipitation 39.0 mm (1.5 in)
1942-06-14	Record daily precipitation	Record daily precipitation 43.2 mm (1.7 in)

Wettest Day of Each Month

Jun: 43.2 mm (1.7 in)

The wettest day on record for each calendar month at Ilulissat (Jakobshavn). The most was 43.2 mm (1.7 in) on 14 June 1942.

Record daily precipitation for each month at Ilulissat (Jakobshavn)
Month	Record daily precipitation (mm)	Date
Jan	11.8 mm (0.5 in)	2 January 1923
Feb	13.0 mm (0.5 in)	17 February 1948
Mar	23.7 mm (0.9 in)	23 March 1888
Apr	39.0 mm (1.5 in)	1 April 1917
May	21.6 mm (0.9 in)	6 May 1926
Jun	43.2 mm (1.7 in)	14 June 1942
Jul	39.0 mm (1.5 in)	15 July 1953
Aug	33.6 mm (1.3 in)	19 August 1949
Sep	34.7 mm (1.4 in)	9 September 1902
Oct	36.4 mm (1.4 in)	23 October 1878
Nov	29.0 mm (1.1 in)	28 November 1940
Dec	32.0 mm (1.3 in)	18 December 1940

Period of Record Coverage

1876 to 1960

70 years of record at Ilulissat (Jakobshavn), 1876 to 1960. 23 years have data for under 90 percent of days and are left out of rankings: 1876, 1894, 1896, 1915, 1916, 1918, 1920, 1921 and others.

Days with data per year at Ilulissat (Jakobshavn)
Year	Days with data	Share of year	Complete
1876	1	0%	No
1877	342	94%	Yes
1878	354	97%	Yes
1879	346	95%	Yes
1894	238	65%	No
1895	355	97%	Yes
1896	323	88%	No
1897	344	94%	Yes
1898	343	94%	Yes
1899	354	97%	Yes
1900	347	95%	Yes
1901	347	95%	Yes
1902	352	96%	Yes
1903	346	95%	Yes
1904	346	95%	Yes
1905	347	95%	Yes
1906	341	93%	Yes
1907	350	96%	Yes
1908	348	95%	Yes
1909	338	93%	Yes
1910	355	97%	Yes
1911	347	95%	Yes
1912	356	97%	Yes
1913	340	93%	Yes
1914	348	95%	Yes
1915	306	84%	No
1916	262	72%	No
1918	100	27%	No
1919	335	92%	Yes
1920	313	86%	No
1921	289	79%	No
1922	344	94%	Yes
1923	299	82%	No
1924	330	90%	Yes
1925	295	81%	No
1926	263	72%	No
1927	331	91%	Yes
1928	335	92%	Yes
1929	308	84%	No
1930	323	88%	No
1931	328	90%	No
1932	323	88%	No
1933	241	66%	No
1934	185	51%	No
1935	254	70%	No
1936	273	75%	No
1937	255	70%	No
1938	289	79%	No
1939	341	93%	Yes
1940	333	91%	Yes
1941	331	91%	Yes
1942	347	95%	Yes
1943	333	91%	Yes
1944	335	92%	Yes
1945	345	95%	Yes
1946	337	92%	Yes
1947	323	88%	No
1948	334	91%	Yes
1949	327	90%	No
1950	342	94%	Yes
1951	345	95%	Yes
1952	341	93%	Yes
1953	352	96%	Yes
1954	343	94%	Yes
1955	342	94%	Yes
1956	349	95%	Yes
1957	342	94%	Yes
1958	349	96%	Yes
1959	354	97%	Yes
1960	348	95%	Yes

Latest Records

Latest records at Ilulissat (Jakobshavn)
Date	Station	Record	Value	Beat old record by	Old record stood	Significance
8 December 1960	Ilulissat (Jakobshavn), GL	daily high max	4.7 C (40.5 F)	0.8 C (1.4 F)	80 years	33 of 100 (Routine)
30 October 1960	Ilulissat (Jakobshavn), GL	daily rain	9.9 mm (0.39 in)	4.5 mm (0.18 in)	81 years	20 of 100 (Routine)
29 October 1960	Ilulissat (Jakobshavn), GL	daily rain	17.1 mm (0.7 in)	7.8 mm (0.31 in)	52 years	20 of 100 (Routine)
27 October 1960	Ilulissat (Jakobshavn), GL	daily rain	10.4 mm (0.4 in)	5.7 mm (0.22 in)	34 years	20 of 100 (Routine)
13 October 1960	Ilulissat (Jakobshavn), GL	daily high min	6.4 C (43.5 F)	3.1 C (5.6 F)	72 years	35 of 100 (Notable)
12 October 1960	Ilulissat (Jakobshavn), GL	monthly high max (Tie)	14.9 C (58.8 F)	tie	1 year	4 of 100 (Routine)
11 October 1960	Ilulissat (Jakobshavn), GL	daily high min	7.0 C (44.6 F)	3.4 C (6.1 F)	61 years	33 of 100 (Routine)
11 October 1960	Ilulissat (Jakobshavn), GL	daily high max	14.5 C (58.1 F)	4.1 C (7.4 F)	19 years	21 of 100 (Routine)
10 October 1960	Ilulissat (Jakobshavn), GL	daily high max	10.8 C (51.4 F)	0.2 C (0.4 F)	19 years	13 of 100 (Routine)
31 August 1960	Ilulissat (Jakobshavn), GL	daily high min	9.8 C (49.6 F)	0.3 C (0.5 F)	74 years	31 of 100 (Routine)
31 August 1960	Ilulissat (Jakobshavn), GL	daily high max	16.3 C (61.3 F)	0.4 C (0.7 F)	39 years	20 of 100 (Routine)
30 August 1960	Ilulissat (Jakobshavn), GL	daily high max	16.9 C (62.4 F)	2.0 C (3.6 F)	37 years	25 of 100 (Routine)
29 August 1960	Ilulissat (Jakobshavn), GL	daily high max	16.9 C (62.4 F)	0.4 C (0.7 F)	40 years	21 of 100 (Routine)
28 August 1960	Ilulissat (Jakobshavn), GL	daily high max	18.9 C (66.0 F)	2.4 C (4.3 F)	40 years	27 of 100 (Routine)
26 August 1960	Ilulissat (Jakobshavn), GL	daily high max	19.0 C (66.2 F)	3.0 C (5.4 F)	44 years	30 of 100 (Routine)
6 August 1960	Ilulissat (Jakobshavn), GL	monthly high min (Tie)	12.7 C (54.9 F)	tie	43 years	7 of 100 (Routine)
5 August 1960	Ilulissat (Jakobshavn), GL	monthly high max (Tie)	19.8 C (67.6 F)	tie	0 years	4 of 100 (Routine)
4 August 1960	Ilulissat (Jakobshavn), GL	monthly high max	19.8 C (67.6 F)	0.7 C (1.3 F)	31 years	29 of 100 (Routine)
3 August 1960	Ilulissat (Jakobshavn), GL	daily high max	18.0 C (64.4 F)	1.1 C (2.0 F)	33 years	20 of 100 (Routine)
28 July 1960	Ilulissat (Jakobshavn), GL	daily high min	9.8 C (49.6 F)	1.8 C (3.2 F)	86 years	43 of 100 (Notable)

Climate Trend

49 complete years, 1877 to 1960

One stripe for each of 49 complete years at Ilulissat (Jakobshavn), 1877 to 1960. Blue stripes are years cooler than the station's own mean of -4.6 C (23.6 F); red stripes are warmer. The coolest year was 1898, at -8.3 C (17.0 F), and the warmest was 1941, at -1.6 C (29.1 F). The strongest colour marks a difference of 3.7 C (6.7 F).

Annual mean temperature at Ilulissat (Jakobshavn) as warming stripes, 1877 to 1960
Year	Annual mean temperature	Difference from the station mean
1877	-4.3 C	+0.30 C
1878	-3.2 C	+1.47 C
1879	-4.4 C	+0.22 C
1897	-6.5 C	-1.90 C
1898	-8.3 C	-3.67 C
1899	-5.9 C	-1.31 C
1900	-3.9 C	+0.70 C
1901	-4.3 C	+0.31 C
1902	-4.7 C	-0.05 C
1903	-5.0 C	-0.40 C
1904	-5.7 C	-1.08 C
1905	-4.4 C	+0.19 C
1906	-6.6 C	-1.97 C
1907	-6.5 C	-1.83 C
1908	-4.4 C	+0.26 C
1909	-5.2 C	-0.60 C
1910	-7.3 C	-2.69 C
1911	-5.9 C	-1.26 C
1912	-3.4 C	+1.24 C
1913	-5.1 C	-0.51 C
1914	-7.6 C	-2.98 C
1919	-6.0 C	-1.33 C
1920	-6.5 C	-1.86 C
1922	-6.0 C	-1.35 C
1924	-4.1 C	+0.56 C
1927	-3.7 C	+0.92 C
1928	-1.8 C	+2.81 C
1930	-3.1 C	+1.50 C
1931	-3.8 C	+0.86 C
1939	-3.3 C	+1.29 C
1940	-3.0 C	+1.62 C
1941	-1.6 C	+3.04 C
1942	-3.5 C	+1.16 C
1943	-4.2 C	+0.44 C
1944	-4.8 C	-0.20 C
1945	-3.8 C	+0.83 C
1946	-2.9 C	+1.76 C
1948	-4.3 C	+0.29 C
1950	-4.9 C	-0.28 C
1951	-4.8 C	-0.16 C
1952	-3.9 C	+0.72 C
1953	-5.2 C	-0.56 C
1954	-3.8 C	+0.88 C
1955	-4.7 C	-0.10 C
1956	-5.1 C	-0.42 C
1957	-4.4 C	+0.25 C
1958	-3.9 C	+0.69 C
1959	-4.4 C	+0.26 C
1960	-2.6 C	+1.99 C

The annual mean temperature here has risen by 0.2 C (0.1 to 0.4) per decade over 1877 to 1960. In Fahrenheit: 0.4 F (0.1 to 0.7) per decade. The slope is a straight line fitted to 49 complete years; the brackets give its 95 percent interval.

Fitted temperature trends per decade at Ilulissat (Jakobshavn)
Measure	Per decade (C)	Per decade (F)	Period	Complete years	Reading
Annual mean temperature	0.2 C (0.1 to 0.4) per decade	0.4 F (0.1 to 0.7) per decade	1877 to 1960	49	Rise
Mean daily maximum	0.2 C (0.1 to 0.4) per decade	0.4 F (0.1 to 0.7) per decade	1877 to 1960	49	Rise
Mean daily minimum	0.20 C (0.02 to 0.38) per decade	0.36 F (0.03 to 0.68) per decade	1877 to 1960	49	Rise

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

1873 to 1960

Yearly extremes at Ilulissat (Jakobshavn): the record and the median year
Measure	Record	Year of the record	Median year	Years with a value
Hottest day (TXx)	21.9 C (71.4 F)	1908	17.8 C (64.0 F)	70
Coldest night (TNn)	-43.2 C (-45.8 F)	1898	-32.6 C (-26.7 F)	87
Wettest day (Rx1day)	43.2 mm (1.7 in)	1942	18.2 mm (0.7 in)	88
Wettest five days (Rx5day)	95.4 mm (3.8 in)	1902	34.0 mm (1.3 in)	88
Longest dry spell (CDD)	83 days	1880	40 days	88

Hottest day (TXx)

The hottest day of the year at Ilulissat (Jakobshavn), 1873 to 1960. The record is 21.9 C (71.4 F) in 1908, marked on the chart; the median year is 17.8 C (64.0 F).

Hottest day (TXx) at Ilulissat (Jakobshavn) by year
Year	Hottest day (TXx)
1873	n/a
1874	n/a
1875	n/a
1876	-6.7 C (19.9 F)
1877	19.4 C (66.9 F)
1878	16.4 C (61.5 F)
1879	16.1 C (61.0 F)
1880	n/a
1881	n/a
1882	n/a
1883	n/a
1884	n/a
1885	n/a
1886	n/a
1887	n/a
1888	n/a
1889	n/a
1890	n/a
1891	n/a
1892	n/a
1893	n/a
1894	18.3 C (64.9 F)
1895	17.3 C (63.1 F)
1896	17.8 C (64.0 F)
1897	16.8 C (62.2 F)
1898	18.3 C (64.9 F)
1899	16.3 C (61.3 F)
1900	19.0 C (66.2 F)
1901	17.7 C (63.9 F)
1902	19.2 C (66.6 F)
1903	17.4 C (63.3 F)
1904	16.7 C (62.1 F)
1905	15.6 C (60.1 F)
1906	18.1 C (64.6 F)
1907	15.7 C (60.3 F)
1908	21.9 C (71.4 F)
1909	17.3 C (63.1 F)
1910	19.9 C (67.8 F)
1911	16.4 C (61.5 F)
1912	18.6 C (65.5 F)
1913	18.2 C (64.8 F)
1914	17.4 C (63.3 F)
1915	16.5 C (61.7 F)
1916	19.0 C (66.2 F)
1917	n/a
1918	9.9 C (49.8 F)
1919	18.7 C (65.7 F)
1920	17.0 C (62.6 F)
1921	15.9 C (60.6 F)
1922	14.8 C (58.6 F)
1923	19.4 C (66.9 F)
1924	16.4 C (61.5 F)
1925	16.0 C (60.8 F)
1926	13.2 C (55.8 F)
1927	16.9 C (62.4 F)
1928	19.1 C (66.4 F)
1929	16.3 C (61.3 F)
1930	20.2 C (68.4 F)
1931	17.9 C (64.2 F)
1932	18.2 C (64.8 F)
1933	16.2 C (61.2 F)
1934	16.0 C (60.8 F)
1935	16.6 C (61.9 F)
1936	16.8 C (62.2 F)
1937	12.9 C (55.2 F)
1938	13.9 C (57.0 F)
1939	18.8 C (65.8 F)
1940	19.8 C (67.6 F)
1941	20.0 C (68.0 F)
1942	18.0 C (64.4 F)
1943	18.8 C (65.8 F)
1944	18.9 C (66.0 F)
1945	19.0 C (66.2 F)
1946	17.0 C (62.6 F)
1947	18.8 C (65.8 F)
1948	20.4 C (68.7 F)
1949	20.8 C (69.4 F)
1950	18.3 C (64.9 F)
1951	17.8 C (64.0 F)
1952	17.8 C (64.0 F)
1953	17.2 C (63.0 F)
1954	17.1 C (62.8 F)
1955	18.8 C (65.8 F)
1956	18.7 C (65.7 F)
1957	18.5 C (65.3 F)
1958	16.9 C (62.4 F)
1959	20.7 C (69.3 F)
1960	19.8 C (67.6 F)

Coldest night (TNn)

The coldest night of the year at Ilulissat (Jakobshavn), 1873 to 1960. The record is -43.2 C (-45.8 F) in 1898, marked on the chart; the median year is -32.6 C (-26.7 F).

Coldest night (TNn) at Ilulissat (Jakobshavn) by year
Year	Coldest night (TNn)
1873	-26.4 C (-15.5 F)
1874	-32.5 C (-26.5 F)
1875	-38.9 C (-38.0 F)
1876	-29.0 C (-20.2 F)
1877	-32.4 C (-26.3 F)
1878	-37.9 C (-36.2 F)
1879	-33.0 C (-27.4 F)
1880	-20.2 C (-4.4 F)
1881	-33.4 C (-28.1 F)
1882	-39.4 C (-38.9 F)
1883	-36.5 C (-33.7 F)
1884	-42.0 C (-43.6 F)
1885	-29.9 C (-21.8 F)
1886	-40.0 C (-40.0 F)
1887	-38.2 C (-36.8 F)
1888	-39.6 C (-39.3 F)
1889	-34.9 C (-30.8 F)
1890	-39.8 C (-39.6 F)
1891	-37.0 C (-34.6 F)
1892	-37.0 C (-34.6 F)
1893	-34.0 C (-29.2 F)
1894	-37.5 C (-35.5 F)
1895	-27.5 C (-17.5 F)
1896	-42.7 C (-44.9 F)
1897	-37.2 C (-35.0 F)
1898	-43.2 C (-45.8 F)
1899	-36.2 C (-33.2 F)
1900	-31.5 C (-24.7 F)
1901	-35.7 C (-32.3 F)
1902	-30.2 C (-22.4 F)
1903	-37.2 C (-35.0 F)
1904	-31.2 C (-24.2 F)
1905	-33.3 C (-27.9 F)
1906	-37.0 C (-34.6 F)
1907	-38.0 C (-36.4 F)
1908	-36.1 C (-33.0 F)
1909	-38.3 C (-36.9 F)
1910	-38.4 C (-37.1 F)
1911	-41.3 C (-42.3 F)
1912	-30.1 C (-22.2 F)
1913	-27.3 C (-17.1 F)
1914	-36.3 C (-33.3 F)
1915	-35.3 C (-31.5 F)
1916	-30.3 C (-22.5 F)
1917	-27.3 C (-17.1 F)
1918	-37.3 C (-35.1 F)
1919	-38.0 C (-36.4 F)
1920	-34.1 C (-29.4 F)
1921	-32.7 C (-26.9 F)
1922	-37.0 C (-34.6 F)
1923	-36.7 C (-34.1 F)
1924	-37.0 C (-34.6 F)
1925	-35.6 C (-32.1 F)
1926	-29.1 C (-20.4 F)
1927	-29.8 C (-21.6 F)
1928	-28.5 C (-19.3 F)
1929	-23.0 C (-9.4 F)
1930	-27.2 C (-17.0 F)
1931	-28.0 C (-18.4 F)
1932	-31.5 C (-24.7 F)
1933	-29.1 C (-20.4 F)
1934	-29.1 C (-20.4 F)
1935	0.5 C (32.9 F)
1936	n/a
1937	-24.7 C (-12.5 F)
1938	-29.4 C (-20.9 F)
1939	-30.0 C (-22.0 F)
1940	-30.2 C (-22.4 F)
1941	-22.6 C (-8.7 F)
1942	-30.6 C (-23.1 F)
1943	-29.6 C (-21.3 F)
1944	-30.2 C (-22.4 F)
1945	-32.6 C (-26.7 F)
1946	-24.6 C (-12.3 F)
1947	-22.3 C (-8.1 F)
1948	-27.4 C (-17.3 F)
1949	-34.8 C (-30.6 F)
1950	-36.4 C (-33.5 F)
1951	-32.4 C (-26.3 F)
1952	-33.5 C (-28.3 F)
1953	-31.6 C (-24.9 F)
1954	-28.8 C (-19.8 F)
1955	-36.0 C (-32.8 F)
1956	-31.6 C (-24.9 F)
1957	-31.2 C (-24.2 F)
1958	-29.6 C (-21.3 F)
1959	-32.0 C (-25.6 F)
1960	-30.4 C (-22.7 F)

Wettest day (Rx1day)

The wettest day of the year at Ilulissat (Jakobshavn), 1873 to 1960. The record is 43.2 mm (1.7 in) in 1942, marked on the chart; the median year is 18.2 mm (0.7 in).

Wettest day (Rx1day) at Ilulissat (Jakobshavn) by year
Year	Wettest day (Rx1day)
1873	11.1 mm (0.4 in)
1874	11.6 mm (0.5 in)
1875	13.8 mm (0.5 in)
1876	11.8 mm (0.5 in)
1877	20.4 mm (0.8 in)
1878	36.4 mm (1.4 in)
1879	10.2 mm (0.4 in)
1880	9.2 mm (0.36 in)
1881	23.8 mm (0.9 in)
1882	13.2 mm (0.5 in)
1883	26.5 mm (1.0 in)
1884	9.1 mm (0.36 in)
1885	15.4 mm (0.6 in)
1886	19.4 mm (0.8 in)
1887	12.1 mm (0.5 in)
1888	23.7 mm (0.9 in)
1889	23.9 mm (0.9 in)
1890	22.8 mm (0.9 in)
1891	23.5 mm (0.9 in)
1892	18.6 mm (0.7 in)
1893	20.4 mm (0.8 in)
1894	19.0 mm (0.7 in)
1895	14.7 mm (0.6 in)
1896	11.2 mm (0.4 in)
1897	14.7 mm (0.6 in)
1898	8.2 mm (0.32 in)
1899	10.5 mm (0.4 in)
1900	16.3 mm (0.6 in)
1901	16.4 mm (0.6 in)
1902	34.7 mm (1.4 in)
1903	16.2 mm (0.6 in)
1904	17.4 mm (0.7 in)
1905	29.3 mm (1.2 in)
1906	27.6 mm (1.1 in)
1907	13.7 mm (0.5 in)
1908	20.7 mm (0.8 in)
1909	18.4 mm (0.7 in)
1910	18.4 mm (0.7 in)
1911	15.7 mm (0.6 in)
1912	18.1 mm (0.7 in)
1913	18.5 mm (0.7 in)
1914	13.4 mm (0.5 in)
1915	24.6 mm (1.0 in)
1916	21.7 mm (0.9 in)
1917	39.0 mm (1.5 in)
1918	18.7 mm (0.7 in)
1919	29.3 mm (1.2 in)
1920	15.4 mm (0.6 in)
1921	10.5 mm (0.4 in)
1922	16.2 mm (0.6 in)
1923	12.9 mm (0.5 in)
1924	19.6 mm (0.8 in)
1925	15.9 mm (0.6 in)
1926	21.6 mm (0.9 in)
1927	15.8 mm (0.6 in)
1928	15.7 mm (0.6 in)
1929	16.3 mm (0.6 in)
1930	23.8 mm (0.9 in)
1931	18.2 mm (0.7 in)
1932	23.9 mm (0.9 in)
1933	20.2 mm (0.8 in)
1934	14.4 mm (0.6 in)
1935	33.1 mm (1.3 in)
1936	19.6 mm (0.8 in)
1937	11.2 mm (0.4 in)
1938	18.2 mm (0.7 in)
1939	11.1 mm (0.4 in)
1940	32.0 mm (1.3 in)
1941	10.3 mm (0.4 in)
1942	43.2 mm (1.7 in)
1943	20.8 mm (0.8 in)
1944	29.0 mm (1.1 in)
1945	14.3 mm (0.6 in)
1946	27.2 mm (1.1 in)
1947	20.4 mm (0.8 in)
1948	17.2 mm (0.7 in)
1949	33.6 mm (1.3 in)
1950	15.6 mm (0.6 in)
1951	26.8 mm (1.1 in)
1952	21.4 mm (0.8 in)
1953	39.0 mm (1.5 in)
1954	16.7 mm (0.7 in)
1955	14.2 mm (0.6 in)
1956	17.2 mm (0.7 in)
1957	25.4 mm (1.0 in)
1958	15.4 mm (0.6 in)
1959	13.4 mm (0.5 in)
1960	17.1 mm (0.7 in)

Wettest five days (Rx5day)

The wettest five days of the year at Ilulissat (Jakobshavn), 1873 to 1960. The record is 95.4 mm (3.8 in) in 1902, marked on the chart; the median year is 34.0 mm (1.3 in).

Wettest five days (Rx5day) at Ilulissat (Jakobshavn) by year
Year	Wettest five days (Rx5day)
1873	23.7 mm (0.9 in)
1874	28.4 mm (1.1 in)
1875	25.6 mm (1.0 in)
1876	21.0 mm (0.8 in)
1877	42.7 mm (1.7 in)
1878	43.9 mm (1.7 in)
1879	28.2 mm (1.1 in)
1880	15.6 mm (0.6 in)
1881	44.6 mm (1.8 in)
1882	23.6 mm (0.9 in)
1883	48.5 mm (1.9 in)
1884	16.4 mm (0.6 in)
1885	35.9 mm (1.4 in)
1886	33.3 mm (1.3 in)
1887	21.6 mm (0.9 in)
1888	39.5 mm (1.6 in)
1889	50.7 mm (2.0 in)
1890	38.2 mm (1.5 in)
1891	32.3 mm (1.3 in)
1892	38.7 mm (1.5 in)
1893	38.7 mm (1.5 in)
1894	51.7 mm (2.0 in)
1895	43.5 mm (1.7 in)
1896	24.0 mm (0.9 in)
1897	24.4 mm (1.0 in)
1898	17.5 mm (0.7 in)
1899	31.0 mm (1.2 in)
1900	26.1 mm (1.0 in)
1901	23.2 mm (0.9 in)
1902	95.4 mm (3.8 in)
1903	43.0 mm (1.7 in)
1904	29.0 mm (1.1 in)
1905	33.5 mm (1.3 in)
1906	60.9 mm (2.4 in)
1907	28.1 mm (1.1 in)
1908	51.4 mm (2.0 in)
1909	31.8 mm (1.3 in)
1910	51.9 mm (2.0 in)
1911	29.0 mm (1.1 in)
1912	40.9 mm (1.6 in)
1913	32.3 mm (1.3 in)
1914	20.5 mm (0.8 in)
1915	39.5 mm (1.6 in)
1916	34.4 mm (1.4 in)
1917	67.7 mm (2.7 in)
1918	24.1 mm (0.9 in)
1919	37.9 mm (1.5 in)
1920	34.5 mm (1.4 in)
1921	22.4 mm (0.9 in)
1922	31.8 mm (1.3 in)
1923	23.9 mm (0.9 in)
1924	31.3 mm (1.2 in)
1925	35.9 mm (1.4 in)
1926	28.0 mm (1.1 in)
1927	28.8 mm (1.1 in)
1928	26.5 mm (1.0 in)
1929	23.4 mm (0.9 in)
1930	25.4 mm (1.0 in)
1931	36.7 mm (1.4 in)
1932	32.2 mm (1.3 in)
1933	44.3 mm (1.7 in)
1934	30.3 mm (1.2 in)
1935	93.1 mm (3.7 in)
1936	40.3 mm (1.6 in)
1937	22.5 mm (0.9 in)
1938	40.5 mm (1.6 in)
1939	25.4 mm (1.0 in)
1940	37.0 mm (1.5 in)
1941	26.2 mm (1.0 in)
1942	87.2 mm (3.4 in)
1943	56.1 mm (2.2 in)
1944	49.1 mm (1.9 in)
1945	44.3 mm (1.7 in)
1946	40.2 mm (1.6 in)
1947	56.2 mm (2.2 in)
1948	40.6 mm (1.6 in)
1949	39.5 mm (1.6 in)
1950	26.2 mm (1.0 in)
1951	29.2 mm (1.1 in)
1952	43.4 mm (1.7 in)
1953	69.4 mm (2.7 in)
1954	44.5 mm (1.8 in)
1955	22.5 mm (0.9 in)
1956	41.9 mm (1.6 in)
1957	64.0 mm (2.5 in)
1958	23.6 mm (0.9 in)
1959	24.7 mm (1.0 in)
1960	46.8 mm (1.8 in)

Longest dry spell (CDD)

The longest dry spell of the year at Ilulissat (Jakobshavn), 1873 to 1960. The record is 83 days in 1880, marked on the chart; the median year is 40 days.

Longest dry spell (CDD) at Ilulissat (Jakobshavn) by year
Year	Longest dry spell (CDD)
1873	27 days
1874	43 days
1875	23 days
1876	35 days
1877	50 days
1878	30 days
1879	45 days
1880	83 days
1881	36 days
1882	29 days
1883	29 days
1884	22 days
1885	52 days
1886	56 days
1887	34 days
1888	44 days
1889	34 days
1890	55 days
1891	34 days
1892	31 days
1893	57 days
1894	72 days
1895	39 days
1896	55 days
1897	46 days
1898	35 days
1899	45 days
1900	49 days
1901	22 days
1902	43 days
1903	28 days
1904	34 days
1905	27 days
1906	46 days
1907	38 days
1908	24 days
1909	48 days
1910	38 days
1911	37 days
1912	29 days
1913	31 days
1914	42 days
1915	37 days
1916	38 days
1917	27 days
1918	53 days
1919	64 days
1920	79 days
1921	42 days
1922	52 days
1923	48 days
1924	32 days
1925	44 days
1926	48 days
1927	41 days
1928	41 days
1929	31 days
1930	28 days
1931	67 days
1932	23 days
1933	60 days
1934	60 days
1935	48 days
1936	45 days
1937	73 days
1938	34 days
1939	51 days
1940	43 days
1941	29 days
1942	35 days
1943	49 days
1944	39 days
1945	40 days
1946	51 days
1947	31 days
1948	23 days
1949	48 days
1950	33 days
1951	50 days
1952	45 days
1953	38 days
1954	64 days
1955	30 days
1956	36 days
1957	35 days
1958	32 days
1959	51 days
1960	34 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

49 years with a frost

Across 49 years with a frost, the median last spring frost at Ilulissat (Jakobshavn) falls on 13 June and the median first autumn frost on 30 August, which leaves a median of 80 days between them.

Fitted over all years, the growing season changes by +0.6 days per decade at this station.

Frost dates and growing season at Ilulissat (Jakobshavn)
Measure	Median, all years	Earliest period	Recent period (1913 to 1960)	Recent against earliest	Fitted trend
Last spring frost	13 June	n/a	17 June	n/a	+0.5 days per decade
First autumn frost	30 August	n/a	30 August	n/a	+1.1 days per decade
Growing days	80 days	n/a	78 days	n/a	+0.6 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.

Rainfall Return Levels

87 years, 1874 to 1960

A day with at least 18.0 mm (0.7 in) of rain is expected about once in 2 years. A day with at least 45.2 mm (1.8 in) of rain is expected about once in 100 years.

Rainfall return levels at Ilulissat (Jakobshavn): the daily rain expected about once in a given number of years
Expected about once in	A day with at least	Note
2 years	18.0 mm (0.7 in)
5 years	24.6 mm (1.0 in)
10 years	29.2 mm (1.1 in)
25 years	35.4 mm (1.4 in)
50 years	40.2 mm (1.6 in)
100 years	45.2 mm (1.8 in)	Longer than the 87 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, 87 years of values from 1874 to 1960.

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: 43.2 mm (1.7 in) in 1942; 39.0 mm (1.5 in) in 1917; 39.0 mm (1.5 in) in 1953.

Download the Data

Data for Ilulissat (Jakobshavn) standing records by year: CSV or JSON. Field meanings are on the data page.
Data for Ilulissat (Jakobshavn) 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).