Geneve Observatoire Weather Records (SZ000008390)

Record envelope, standing records and threshold days for Geneve Observatoire (SZ000008390), Switzerland, with 126 years of record.

Key Facts for Geneve Observatoire

Geneve Observatoire (SZ000008390) is a weather station in Switzerland at 46.20 latitude and 6.15 longitude, 405 m (1,329 ft) above sea level.
The station reports from 1901 to 2026, 126 years of record.
1,464 records set at Geneve Observatoire still stand.
Records are tracked for tmax, tmin, prcp, snwd: an element needs 30 years of data to be eligible.
Geneve Observatoire set a daily record precipitation of 29.7 mm (1.2 in) on 2 June 2026.

About the Station

Location: Switzerland, 46.20 latitude, 6.15 longitude.
Elevation: 405 m (1,329 ft).
Period of record: 1901 to 2026, 126 years.
Eligible elements: tmax, tmin, prcp, snwd.

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 Geneve Observatoire. 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 Geneve Observatoire, with 2026 drawn through them
Month	Highest record high	Lowest record low	2026 highest maximum	2026 lowest minimum
Jan	17.3 C (63.1 F)	-14.9 C (5.2 F)	n/a	n/a
Feb	20.6 C (69.1 F)	-18.3 C (-0.9 F)	n/a	n/a
Mar	22.9 C (73.2 F)	-11.4 C (11.5 F)	n/a	n/a
Apr	27.5 C (81.5 F)	-4.5 C (23.9 F)	n/a	n/a
May	32.0 C (89.6 F)	-1.7 C (28.9 F)	n/a	n/a
Jun	35.7 C (96.3 F)	3.8 C (38.8 F)	n/a	n/a
Jul	38.3 C (100.9 F)	5.3 C (41.5 F)	n/a	n/a
Aug	36.5 C (97.7 F)	4.8 C (40.6 F)	n/a	n/a
Sep	34.8 C (94.6 F)	1.2 C (34.2 F)	n/a	n/a
Oct	26.0 C (78.8 F)	-3.7 C (25.3 F)	n/a	n/a
Nov	23.2 C (73.8 F)	-8.5 C (16.7 F)	n/a	n/a
Dec	20.8 C (69.4 F)	-16.0 C (3.2 F)	n/a	n/a

Which Years Hold Standing Records

1,464 standing records

1,464 records at Geneve Observatoire still stand. 1919 holds the most, with 51.

Standing records at Geneve Observatoire by the year they were set
Year set	Standing records
1901	32
1902	23
1903	19
1904	16
1905	31
1906	31
1907	6
1908	20
1909	44
1910	15
1911	24
1912	36
1913	18
1914	26
1915	34
1916	17
1917	19
1918	19
1919	51
1920	18
1921	25
1922	26
1923	23
1924	21
1925	37
1926	21
1927	13
1928	27
1929	27
1930	10
1931	33
1932	8
1933	20
1934	12
1935	14
1936	32
1937	6
1938	16
1939	31
1940	23
1941	21
1942	20
1943	7
1944	18
1945	26
1946	13
1947	41
1948	25
1949	35
1950	17
1951	7
1952	29
1953	16
1954	11
1955	18
1956	22
1957	25
1958	28
1959	11
1960	11
1961	35
1962	32
1963	21
1964	9
1965	15
1966	27

All-Time Record Progression

6 new records

6 all-time records were set at Geneve Observatoire between 14 November 1940 and 11 February 1956. Each dot is a new record.

When Geneve Observatoire set new all-time records
Date	Kind	Detail
1940-11-14	Record daily precipitation	Record daily precipitation 71.5 mm (2.8 in)
1943-09-22	Record daily precipitation	Record daily precipitation 79.8 mm (3.1 in)
1944-08-24	Record high minimum temperature	Record high minimum temperature 22.1 C (71.8 F)
1952-07-05	Record high minimum temperature	Record high minimum temperature 22.6 C (72.7 F)
1956-02-10	Record low maximum temperature	Record low maximum temperature -13.8 C (7.2 F)
1956-02-11	Record low maximum temperature	Record low maximum temperature -14.6 C (5.7 F)

Wettest Day of Each Month

Sep: 79.8 mm (3.1 in)

The wettest day on record for each calendar month at Geneve Observatoire. The most was 79.8 mm (3.1 in) on 22 September 1943.

Record daily precipitation for each month at Geneve Observatoire
Month	Record daily precipitation (mm)	Date
Jan	60.0 mm (2.4 in)	2 January 1949
Feb	42.0 mm (1.7 in)	14 February 1925
Mar	49.3 mm (1.9 in)	7 March 1920
Apr	44.9 mm (1.8 in)	16 April 1902
May	44.5 mm (1.8 in)	6 May 1932
Jun	57.6 mm (2.3 in)	12 June 1938
Jul	63.0 mm (2.5 in)	22 July 1914
Aug	71.2 mm (2.8 in)	15 August 1928
Sep	79.8 mm (3.1 in)	22 September 1943
Oct	61.0 mm (2.4 in)	2 October 1912
Nov	76.0 mm (3.0 in)	11 November 1950
Dec	53.8 mm (2.1 in)	9 December 1954

Period of Record Coverage

1901 to 1966

66 years of record at Geneve Observatoire, 1901 to 1966. Every year has data for at least 90 percent of its days.

Days with data per year at Geneve Observatoire
Year	Days with data	Share of year	Complete
1901	365	100%	Yes
1902	365	100%	Yes
1903	365	100%	Yes
1904	366	100%	Yes
1905	365	100%	Yes
1906	365	100%	Yes
1907	365	100%	Yes
1908	366	100%	Yes
1909	365	100%	Yes
1910	365	100%	Yes
1911	365	100%	Yes
1912	366	100%	Yes
1913	365	100%	Yes
1914	365	100%	Yes
1915	365	100%	Yes
1916	365	100%	Yes
1917	365	100%	Yes
1918	365	100%	Yes
1919	365	100%	Yes
1920	366	100%	Yes
1921	365	100%	Yes
1922	365	100%	Yes
1923	365	100%	Yes
1924	366	100%	Yes
1925	365	100%	Yes
1926	365	100%	Yes
1927	365	100%	Yes
1928	366	100%	Yes
1929	365	100%	Yes
1930	365	100%	Yes
1931	365	100%	Yes
1932	366	100%	Yes
1933	365	100%	Yes
1934	365	100%	Yes
1935	365	100%	Yes
1936	366	100%	Yes
1937	365	100%	Yes
1938	365	100%	Yes
1939	365	100%	Yes
1940	366	100%	Yes
1941	365	100%	Yes
1942	365	100%	Yes
1943	365	100%	Yes
1944	366	100%	Yes
1945	365	100%	Yes
1946	365	100%	Yes
1947	365	100%	Yes
1948	365	100%	Yes
1949	365	100%	Yes
1950	365	100%	Yes
1951	365	100%	Yes
1952	366	100%	Yes
1953	365	100%	Yes
1954	365	100%	Yes
1955	365	100%	Yes
1956	366	100%	Yes
1957	365	100%	Yes
1958	365	100%	Yes
1959	365	100%	Yes
1960	366	100%	Yes
1961	365	100%	Yes
1962	364	100%	Yes
1963	362	99%	Yes
1964	364	99%	Yes
1965	365	100%	Yes
1966	334	92%	Yes

Latest Records

Latest records at Geneve Observatoire
Date	Station	Record	Value	Beat old record by	Old record stood	Significance
2 June 2026	Geneve Observatoire, CH	daily rain	29.7 mm (1.2 in)	17.5 mm (0.7 in)	124 years	61 of 100 (Major)
4 November 1966	Geneve Observatoire, CH	daily low max	4.2 C (39.6 F)	0.1 C (0.2 F)	24 years	13 of 100 (Routine)
26 October 1966	Geneve Observatoire, CH	daily rain	36.7 mm (1.4 in)	19.1 mm (0.8 in)	33 years	39 of 100 (Notable)
23 October 1966	Geneve Observatoire, CH	daily high max	21.0 C (69.8 F)	0.6 C (1.1 F)	23 years	13 of 100 (Routine)
15 October 1966	Geneve Observatoire, CH	daily high min	13.0 C (55.4 F)	0.2 C (0.4 F)	27 years	14 of 100 (Routine)
11 October 1966	Geneve Observatoire, CH	daily high min	14.5 C (58.1 F)	0.5 C (0.9 F)	19 years	12 of 100 (Routine)
17 August 1966	Geneve Observatoire, CH	daily low max	14.6 C (58.3 F)	3.6 C (6.5 F)	3 years	15 of 100 (Routine)
16 August 1966	Geneve Observatoire, CH	daily low max	16.1 C (61.0 F)	0.5 C (0.9 F)	41 years	19 of 100 (Routine)
14 August 1966	Geneve Observatoire, CH	daily high min	19.5 C (67.1 F)	0.5 C (0.9 F)	12 years	10 of 100 (Routine)
19 July 1966	Geneve Observatoire, CH	daily low max	16.5 C (61.7 F)	0.1 C (0.2 F)	57 years	23 of 100 (Routine)
18 July 1966	Geneve Observatoire, CH	daily low max	14.5 C (58.1 F)	5.1 C (9.2 F)	17 years	23 of 100 (Routine)
17 July 1966	Geneve Observatoire, CH	daily low max	17.0 C (62.6 F)	1.5 C (2.7 F)	4 years	10 of 100 (Routine)
17 June 1966	Geneve Observatoire, CH	daily high min	18.6 C (65.5 F)	0.6 C (1.1 F)	39 years	19 of 100 (Routine)
16 June 1966	Geneve Observatoire, CH	daily high max	31.1 C (88.0 F)	1.1 C (2.0 F)	57 years	25 of 100 (Routine)
11 June 1966	Geneve Observatoire, CH	daily high min	18.0 C (64.4 F)	0.8 C (1.4 F)	16 years	12 of 100 (Routine)
8 June 1966	Geneve Observatoire, CH	daily high min	16.4 C (61.5 F)	0.4 C (0.7 F)	40 years	19 of 100 (Routine)
5 May 1966	Geneve Observatoire, CH	daily rain	22.5 mm (0.9 in)	4.1 mm (0.16 in)	57 years	20 of 100 (Routine)
4 May 1966	Geneve Observatoire, CH	daily high min	14.0 C (57.2 F)	1.7 C (3.1 F)	1 year	11 of 100 (Routine)
20 April 1966	Geneve Observatoire, CH	daily rain	21.5 mm (0.8 in)	5.3 mm (0.21 in)	48 years	20 of 100 (Routine)
14 April 1966	Geneve Observatoire, CH	daily high min	10.8 C (51.4 F)	0.5 C (0.9 F)	27 years	15 of 100 (Routine)

Climate Trend

65 complete years, 1901 to 1965

One stripe for each of 65 complete years at Geneve Observatoire, 1901 to 1965. Blue stripes are years cooler than the station's own mean of 10.2 C (50.4 F); red stripes are warmer. The coolest year was 1917, at 8.9 C (48.0 F), and the warmest was 1961, at 11.6 C (52.9 F). The strongest colour marks a difference of 1.4 C (2.5 F).

Annual mean temperature at Geneve Observatoire as warming stripes, 1901 to 1965
Year	Annual mean temperature	Difference from the station mean
1901	9.3 C	-0.92 C
1902	9.7 C	-0.49 C
1903	9.8 C	-0.40 C
1904	10.5 C	+0.30 C
1905	9.9 C	-0.35 C
1906	10.1 C	-0.11 C
1907	9.9 C	-0.30 C
1908	9.5 C	-0.74 C
1909	9.1 C	-1.12 C
1910	9.9 C	-0.34 C
1911	10.7 C	+0.48 C
1912	9.6 C	-0.58 C
1913	10.0 C	-0.18 C
1914	9.5 C	-0.71 C
1915	9.6 C	-0.62 C
1916	9.8 C	-0.46 C
1917	8.9 C	-1.30 C
1918	9.9 C	-0.33 C
1919	9.5 C	-0.71 C
1920	10.5 C	+0.32 C
1921	10.7 C	+0.51 C
1922	9.6 C	-0.64 C
1923	10.4 C	+0.14 C
1924	9.7 C	-0.48 C
1925	10.0 C	-0.18 C
1926	10.5 C	+0.25 C
1927	10.3 C	+0.13 C
1928	11.0 C	+0.78 C
1929	9.9 C	-0.34 C
1930	10.8 C	+0.60 C
1931	9.7 C	-0.48 C
1932	9.9 C	-0.36 C
1933	9.7 C	-0.56 C
1934	10.7 C	+0.50 C
1935	10.3 C	+0.11 C
1936	10.5 C	+0.28 C
1937	10.7 C	+0.47 C
1938	10.2 C	-0.06 C
1939	10.0 C	-0.22 C
1940	9.3 C	-0.87 C
1941	9.5 C	-0.70 C
1942	10.1 C	-0.10 C
1943	11.0 C	+0.76 C
1944	10.0 C	-0.17 C
1945	10.8 C	+0.62 C
1946	10.7 C	+0.47 C
1947	11.5 C	+1.25 C
1948	10.9 C	+0.64 C
1949	11.3 C	+1.09 C
1950	11.2 C	+0.94 C
1951	10.7 C	+0.52 C
1952	10.8 C	+0.63 C
1953	10.6 C	+0.39 C
1954	10.3 C	+0.10 C
1955	10.6 C	+0.39 C
1956	9.4 C	-0.83 C
1957	10.5 C	+0.27 C
1958	10.6 C	+0.37 C
1959	11.2 C	+0.97 C
1960	10.8 C	+0.57 C
1961	11.6 C	+1.38 C
1962	10.2 C	0.00 C
1963	9.6 C	-0.61 C
1964	10.7 C	+0.47 C
1965	10.0 C	-0.19 C

The annual mean temperature here has risen by 0.2 C (0.1 to 0.2) per decade over 1901 to 1965. In Fahrenheit: 0.3 F (0.2 to 0.4) per decade. The slope is a straight line fitted to 65 complete years; the brackets give its 95 percent interval.

Fitted temperature trends per decade at Geneve Observatoire
Measure	Per decade (C)	Per decade (F)	Period	Complete years	Reading
Annual mean temperature	0.2 C (0.1 to 0.2) per decade	0.3 F (0.2 to 0.4) per decade	1901 to 1965	65	Rise
Mean daily maximum	0.04 C (-0.05 to 0.13) per decade	0.1 F (-0.1 to 0.2) per decade	1901 to 1965	65	Not clearly different from zero
Mean daily minimum	0.3 C (0.2 to 0.3) per decade	0.5 F (0.4 to 0.6) per decade	1901 to 1965	65	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

1901 to 2026

Yearly extremes at Geneve Observatoire: the record and the median year
Measure	Record	Year of the record	Median year	Years with a value
Hottest day (TXx)	38.3 C (100.9 F)	1921	32.7 C (90.8 F)	66
Coldest night (TNn)	-18.3 C (-0.9 F)	1929	-9.8 C (14.4 F)	66
Wettest day (Rx1day)	79.8 mm (3.1 in)	1943	47.1 mm (1.9 in)	68
Wettest five days (Rx5day)	146.8 mm (5.8 in)	1924	80.3 mm (3.2 in)	68
Longest dry spell (CDD)	47 days	1953	23 days	68

Hottest day (TXx)

The hottest day of the year at Geneve Observatoire, 1901 to 2026. The record is 38.3 C (100.9 F) in 1921, marked on the chart; the median year is 32.7 C (90.8 F).

Hottest day (TXx) at Geneve Observatoire by year
Year	Hottest day (TXx)
1901	31.2 C (88.2 F)
1902	33.9 C (93.0 F)
1903	31.9 C (89.4 F)
1904	35.3 C (95.5 F)
1905	35.2 C (95.4 F)
1906	35.3 C (95.5 F)
1907	33.7 C (92.7 F)
1908	32.2 C (90.0 F)
1909	30.5 C (86.9 F)
1910	32.2 C (90.0 F)
1911	36.1 C (97.0 F)
1912	31.3 C (88.3 F)
1913	30.2 C (86.4 F)
1914	30.2 C (86.4 F)
1915	29.4 C (84.9 F)
1916	30.0 C (86.0 F)
1917	32.3 C (90.1 F)
1918	33.1 C (91.6 F)
1919	33.8 C (92.8 F)
1920	32.7 C (90.9 F)
1921	38.3 C (100.9 F)
1922	32.4 C (90.3 F)
1923	35.0 C (95.0 F)
1924	33.2 C (91.8 F)
1925	33.0 C (91.4 F)
1926	31.4 C (88.5 F)
1927	30.0 C (86.0 F)
1928	35.6 C (96.1 F)
1929	33.0 C (91.4 F)
1930	30.1 C (86.2 F)
1931	34.4 C (93.9 F)
1932	31.2 C (88.2 F)
1933	33.8 C (92.8 F)
1934	33.7 C (92.7 F)
1935	33.8 C (92.8 F)
1936	30.4 C (86.7 F)
1937	31.3 C (88.3 F)
1938	32.3 C (90.1 F)
1939	30.1 C (86.2 F)
1940	29.9 C (85.8 F)
1941	32.6 C (90.7 F)
1942	32.4 C (90.3 F)
1943	35.0 C (95.0 F)
1944	34.3 C (93.7 F)
1945	35.6 C (96.1 F)
1946	35.5 C (95.9 F)
1947	36.4 C (97.5 F)
1948	30.4 C (86.7 F)
1949	35.5 C (95.9 F)
1950	35.7 C (96.3 F)
1951	31.5 C (88.7 F)
1952	35.8 C (96.4 F)
1953	30.8 C (87.4 F)
1954	31.8 C (89.2 F)
1955	33.7 C (92.7 F)
1956	30.0 C (86.0 F)
1957	33.0 C (91.4 F)
1958	33.8 C (92.8 F)
1959	31.9 C (89.4 F)
1960	31.4 C (88.5 F)
1961	31.6 C (88.9 F)
1962	34.0 C (93.2 F)
1963	31.8 C (89.2 F)
1964	33.6 C (92.5 F)
1965	33.0 C (91.4 F)
1966	32.5 C (90.5 F)
2025	n/a
2026	n/a

Coldest night (TNn)

The coldest night of the year at Geneve Observatoire, 1901 to 2026. The record is -18.3 C (-0.9 F) in 1929, marked on the chart; the median year is -9.8 C (14.4 F).

Coldest night (TNn) at Geneve Observatoire by year
Year	Coldest night (TNn)
1901	-14.0 C (6.8 F)
1902	-7.7 C (18.1 F)
1903	-6.9 C (19.6 F)
1904	-8.1 C (17.4 F)
1905	-14.5 C (5.9 F)
1906	-16.0 C (3.2 F)
1907	-14.9 C (5.2 F)
1908	-8.2 C (17.2 F)
1909	-11.6 C (11.1 F)
1910	-6.8 C (19.8 F)
1911	-8.5 C (16.7 F)
1912	-8.5 C (16.7 F)
1913	-8.0 C (17.6 F)
1914	-9.8 C (14.4 F)
1915	-11.3 C (11.7 F)
1916	-7.2 C (19.0 F)
1917	-14.2 C (6.4 F)
1918	-14.0 C (6.8 F)
1919	-11.5 C (11.3 F)
1920	-9.2 C (15.4 F)
1921	-7.8 C (18.0 F)
1922	-9.2 C (15.4 F)
1923	-8.0 C (17.6 F)
1924	-9.8 C (14.4 F)
1925	-12.0 C (10.4 F)
1926	-12.0 C (10.4 F)
1927	-11.0 C (12.2 F)
1928	-6.7 C (19.9 F)
1929	-18.3 C (-0.9 F)
1930	-5.6 C (21.9 F)
1931	-9.8 C (14.4 F)
1932	-12.7 C (9.1 F)
1933	-10.0 C (14.0 F)
1934	-8.0 C (17.6 F)
1935	-9.0 C (15.8 F)
1936	-7.3 C (18.9 F)
1937	-6.5 C (20.3 F)
1938	-13.3 C (8.1 F)
1939	-12.0 C (10.4 F)
1940	-12.5 C (9.5 F)
1941	-11.6 C (11.1 F)
1942	-11.3 C (11.7 F)
1943	-6.0 C (21.2 F)
1944	-8.8 C (16.2 F)
1945	-11.2 C (11.8 F)
1946	-9.7 C (14.5 F)
1947	-10.0 C (14.0 F)
1948	-10.8 C (12.6 F)
1949	-10.3 C (13.5 F)
1950	-8.7 C (16.3 F)
1951	-6.0 C (21.2 F)
1952	-10.5 C (13.1 F)
1953	-8.0 C (17.6 F)
1954	-10.8 C (12.6 F)
1955	-7.0 C (19.4 F)
1956	-18.3 C (-0.9 F)
1957	-7.7 C (18.1 F)
1958	-7.4 C (18.7 F)
1959	-6.6 C (20.1 F)
1960	-10.5 C (13.1 F)
1961	-5.6 C (21.9 F)
1962	-11.0 C (12.2 F)
1963	-13.7 C (7.3 F)
1964	-10.0 C (14.0 F)
1965	-9.0 C (15.8 F)
1966	-10.2 C (13.6 F)
2025	n/a
2026	n/a

Wettest day (Rx1day)

The wettest day of the year at Geneve Observatoire, 1901 to 2026. The record is 79.8 mm (3.1 in) in 1943, marked on the chart; the median year is 47.1 mm (1.9 in).

Wettest day (Rx1day) at Geneve Observatoire by year
Year	Wettest day (Rx1day)
1901	37.3 mm (1.5 in)
1902	44.9 mm (1.8 in)
1903	45.5 mm (1.8 in)
1904	51.9 mm (2.0 in)
1905	41.4 mm (1.6 in)
1906	28.2 mm (1.1 in)
1907	37.8 mm (1.5 in)
1908	58.8 mm (2.3 in)
1909	32.3 mm (1.3 in)
1910	46.2 mm (1.8 in)
1911	67.0 mm (2.6 in)
1912	61.0 mm (2.4 in)
1913	56.7 mm (2.2 in)
1914	63.0 mm (2.5 in)
1915	41.8 mm (1.6 in)
1916	41.5 mm (1.6 in)
1917	65.9 mm (2.6 in)
1918	57.4 mm (2.3 in)
1919	45.8 mm (1.8 in)
1920	49.3 mm (1.9 in)
1921	38.8 mm (1.5 in)
1922	36.2 mm (1.4 in)
1923	49.0 mm (1.9 in)
1924	63.0 mm (2.5 in)
1925	42.0 mm (1.7 in)
1926	42.5 mm (1.7 in)
1927	67.3 mm (2.6 in)
1928	71.2 mm (2.8 in)
1929	42.3 mm (1.7 in)
1930	48.8 mm (1.9 in)
1931	52.4 mm (2.1 in)
1932	44.5 mm (1.8 in)
1933	45.0 mm (1.8 in)
1934	34.8 mm (1.4 in)
1935	47.5 mm (1.9 in)
1936	30.9 mm (1.2 in)
1937	60.6 mm (2.4 in)
1938	57.6 mm (2.3 in)
1939	42.1 mm (1.7 in)
1940	71.5 mm (2.8 in)
1941	30.6 mm (1.2 in)
1942	58.8 mm (2.3 in)
1943	79.8 mm (3.1 in)
1944	38.3 mm (1.5 in)
1945	63.0 mm (2.5 in)
1946	71.0 mm (2.8 in)
1947	50.1 mm (2.0 in)
1948	45.0 mm (1.8 in)
1949	60.0 mm (2.4 in)
1950	76.0 mm (3.0 in)
1951	40.1 mm (1.6 in)
1952	38.0 mm (1.5 in)
1953	49.0 mm (1.9 in)
1954	61.7 mm (2.4 in)
1955	54.1 mm (2.1 in)
1956	51.9 mm (2.0 in)
1957	29.2 mm (1.1 in)
1958	47.5 mm (1.9 in)
1959	47.1 mm (1.9 in)
1960	58.3 mm (2.3 in)
1961	27.0 mm (1.1 in)
1962	29.6 mm (1.2 in)
1963	53.3 mm (2.1 in)
1964	47.0 mm (1.9 in)
1965	38.8 mm (1.5 in)
1966	36.7 mm (1.4 in)
2025	23.6 mm (0.9 in)
2026	29.7 mm (1.2 in)

Wettest five days (Rx5day)

The wettest five days of the year at Geneve Observatoire, 1901 to 2026. The record is 146.8 mm (5.8 in) in 1924, marked on the chart; the median year is 80.3 mm (3.2 in).

Wettest five days (Rx5day) at Geneve Observatoire by year
Year	Wettest five days (Rx5day)
1901	74.2 mm (2.9 in)
1902	73.3 mm (2.9 in)
1903	71.0 mm (2.8 in)
1904	78.8 mm (3.1 in)
1905	71.9 mm (2.8 in)
1906	49.4 mm (1.9 in)
1907	63.9 mm (2.5 in)
1908	81.7 mm (3.2 in)
1909	68.8 mm (2.7 in)
1910	109.1 mm (4.3 in)
1911	101.7 mm (4.0 in)
1912	74.0 mm (2.9 in)
1913	100.9 mm (4.0 in)
1914	100.0 mm (3.9 in)
1915	59.5 mm (2.3 in)
1916	75.8 mm (3.0 in)
1917	76.1 mm (3.0 in)
1918	96.1 mm (3.8 in)
1919	91.8 mm (3.6 in)
1920	109.3 mm (4.3 in)
1921	51.6 mm (2.0 in)
1922	97.4 mm (3.8 in)
1923	115.5 mm (4.5 in)
1924	146.8 mm (5.8 in)
1925	70.9 mm (2.8 in)
1926	89.0 mm (3.5 in)
1927	96.7 mm (3.8 in)
1928	96.8 mm (3.8 in)
1929	71.4 mm (2.8 in)
1930	76.7 mm (3.0 in)
1931	87.7 mm (3.5 in)
1932	80.7 mm (3.2 in)
1933	67.8 mm (2.7 in)
1934	68.7 mm (2.7 in)
1935	90.6 mm (3.6 in)
1936	68.6 mm (2.7 in)
1937	129.2 mm (5.1 in)
1938	85.3 mm (3.4 in)
1939	68.0 mm (2.7 in)
1940	96.8 mm (3.8 in)
1941	48.2 mm (1.9 in)
1942	87.9 mm (3.5 in)
1943	131.7 mm (5.2 in)
1944	77.6 mm (3.1 in)
1945	81.7 mm (3.2 in)
1946	128.5 mm (5.1 in)
1947	73.2 mm (2.9 in)
1948	101.0 mm (4.0 in)
1949	71.5 mm (2.8 in)
1950	104.4 mm (4.1 in)
1951	59.3 mm (2.3 in)
1952	80.2 mm (3.2 in)
1953	104.2 mm (4.1 in)
1954	106.8 mm (4.2 in)
1955	80.6 mm (3.2 in)
1956	90.5 mm (3.6 in)
1957	64.0 mm (2.5 in)
1958	83.3 mm (3.3 in)
1959	91.5 mm (3.6 in)
1960	86.9 mm (3.4 in)
1961	50.2 mm (2.0 in)
1962	50.9 mm (2.0 in)
1963	79.1 mm (3.1 in)
1964	61.6 mm (2.4 in)
1965	80.4 mm (3.2 in)
1966	56.5 mm (2.2 in)
2025	49.3 mm (1.9 in)
2026	60.1 mm (2.4 in)

Longest dry spell (CDD)

The longest dry spell of the year at Geneve Observatoire, 1901 to 2026. The record is 47 days in 1953, marked on the chart; the median year is 23 days.

Longest dry spell (CDD) at Geneve Observatoire by year
Year	Longest dry spell (CDD)
1901	22 days
1902	21 days
1903	24 days
1904	18 days
1905	24 days
1906	25 days
1907	16 days
1908	29 days
1909	15 days
1910	14 days
1911	41 days
1912	16 days
1913	17 days
1914	30 days
1915	12 days
1916	18 days
1917	21 days
1918	35 days
1919	32 days
1920	28 days
1921	43 days
1922	17 days
1923	20 days
1924	25 days
1925	28 days
1926	21 days
1927	21 days
1928	27 days
1929	37 days
1930	22 days
1931	25 days
1932	26 days
1933	23 days
1934	29 days
1935	18 days
1936	20 days
1937	25 days
1938	36 days
1939	22 days
1940	18 days
1941	19 days
1942	34 days
1943	25 days
1944	31 days
1945	33 days
1946	20 days
1947	18 days
1948	30 days
1949	27 days
1950	22 days
1951	15 days
1952	24 days
1953	47 days
1954	21 days
1955	24 days
1956	36 days
1957	19 days
1958	27 days
1959	37 days
1960	13 days
1961	18 days
1962	17 days
1963	28 days
1964	18 days
1965	14 days
1966	13 days
2025	24 days
2026	17 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

65 years with a frost

Across 65 years with a frost, the median last spring frost at Geneve Observatoire falls on 8 April and the median first autumn frost on 6 November, which leaves a median of 214 days between them.

In 1936 to 1965 the median growing season was 223 days. That is 24 days more than in 1901 to 1930.

Fitted over all years, the growing season changes by +8.0 days per decade at this station.

Frost dates and growing season at Geneve Observatoire
Measure	Median, all years	Earliest period (1901 to 1930)	Recent period (1936 to 1965)	Recent against earliest	Fitted trend
Last spring frost	8 April	16 April	1 April	15 days earlier	-4.5 days per decade
First autumn frost	6 November	31 October	11 November	11 days later	+3.5 days per decade
Growing days	214 days	199 days	223 days	24 days more	+8.0 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

66 years, 1901 to 1966

A day with at least 48.0 mm (1.9 in) of rain is expected about once in 2 years. A day with at least 83.1 mm (3.3 in) of rain is expected about once in 100 years.

Rainfall return levels at Geneve Observatoire: the daily rain expected about once in a given number of years
Expected about once in	A day with at least	Note
2 years	48.0 mm (1.9 in)
5 years	59.6 mm (2.3 in)
10 years	66.2 mm (2.6 in)
25 years	73.7 mm (2.9 in)
50 years	78.6 mm (3.1 in)
100 years	83.1 mm (3.3 in)	Longer than the 66 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, 66 years of values from 1901 to 1966.

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: 79.8 mm (3.1 in) in 1943; 76.0 mm (3.0 in) in 1950; 71.5 mm (2.8 in) in 1940.

Station Changes

1 suspected

One change was suspected in the annual mean temperature of Geneve Observatoire, at 1950. Each is measured against neighbouring stations.

Relative to 5 neighbouring stations, the station's annual mean temperature from 1950 ran 0.3 C (0.5 F) higher than in the years before (likely change).

Suspected changes in the annual mean temperature at Geneve Observatoire, against neighbouring stations
Year	Shift (C)	Shift (F)	Strength	Neighbours
1950	+0.3	+0.5	likely	5

Possible change at the station (a move, a new instrument or a new site); the record is kept as measured. A "likely" change has a larger test statistic than a "possible" one. Neither says why the station differs from its neighbours. How changes are found, and the largest ones.

Download the Data

Data for Geneve Observatoire standing records by year: CSV or JSON. Field meanings are on the data page.
Data for Geneve Observatoire 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 2026-10-12. Last revised 12 October 2026 (2026-10-12).