Savanne Weather Records (CA006047615)

Record envelope, standing records and threshold days for Savanne (CA006047615), Ontario, Canada, with 71 years of record.

Key Facts for Savanne

Savanne (CA006047615) is a weather station in Ontario, Canada at 48.97 latitude and -90.20 longitude, 459 m (1,506 ft) above sea level.
The station reports from 1884 to 1954, 71 years of record.
1,464 records set at Savanne still stand.
Records are tracked for tmax, tmin, prcp, snow: an element needs 30 years of data to be eligible.
Savanne tied a daily record low minimum temperature of -5.6 C (21.9 F) on 23 September 1954.

About the Station

Location: Ontario, Canada, 48.97 latitude, -90.20 longitude.
Elevation: 459 m (1,506 ft).
Period of record: 1884 to 1954, 71 years.
Eligible elements: tmax, tmin, prcp, snow.

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 Savanne. 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 Savanne, with 2026 drawn through them
Month	Highest record high	Lowest record low	2026 highest maximum	2026 lowest minimum
Jan	8.3 C (46.9 F)	-49.4 C (-56.9 F)	n/a	n/a
Feb	10.0 C (50.0 F)	-49.4 C (-56.9 F)	n/a	n/a
Mar	25.0 C (77.0 F)	-46.7 C (-52.1 F)	n/a	n/a
Apr	27.8 C (82.0 F)	-35.6 C (-32.1 F)	n/a	n/a
May	32.2 C (90.0 F)	-17.2 C (1.0 F)	n/a	n/a
Jun	36.1 C (97.0 F)	-6.7 C (19.9 F)	n/a	n/a
Jul	38.3 C (100.9 F)	-5.6 C (21.9 F)	n/a	n/a
Aug	34.4 C (93.9 F)	-5.6 C (21.9 F)	n/a	n/a
Sep	32.2 C (90.0 F)	-13.3 C (8.1 F)	n/a	n/a
Oct	26.1 C (79.0 F)	-31.1 C (-24.0 F)	n/a	n/a
Nov	17.8 C (64.0 F)	-40.0 C (-40.0 F)	n/a	n/a
Dec	7.8 C (46.0 F)	-49.4 C (-56.9 F)	n/a	n/a

Which Years Hold Standing Records

1,464 standing records

1,464 records at Savanne still stand. 1936 holds the most, with 55.

Standing records at Savanne by the year they were set
Year set	Standing records
1892	32
1893	33
1894	36
1895	24
1896	40
1897	32
1898	26
1899	49
1900	23
1901	23
1902	22
1903	22
1904	11
1905	17
1906	14
1914	35
1915	23
1916	22
1917	26
1918	38
1919	46
1920	28
1921	22
1922	41
1923	31
1924	37
1925	34
1926	33
1927	21
1928	33
1929	43
1930	42
1931	36
1932	31
1933	28
1934	40
1935	35
1936	55
1937	23
1938	23
1939	31
1940	23
1941	43
1942	30
1943	23
1944	25
1945	40
1946	12
1954	7

All-Time Record Progression

1 new records

1 all-time records were set at Savanne between 9 January 1930 and 9 January 1930. Each dot is a new record.

Wettest Day of Each Month

Aug: 101.6 mm (4.0 in)

The wettest day on record for each calendar month at Savanne. The most was 101.6 mm (4.0 in) on 4 August 1914.

Record daily precipitation for each month at Savanne
Month	Record daily precipitation (mm)	Date
Jan	35.6 mm (1.4 in)	15 January 1889
Feb	22.9 mm (0.9 in)	16 February 1889
Mar	33.0 mm (1.3 in)	23 March 1905
Apr	50.0 mm (2.0 in)	27 April 1938
May	66.8 mm (2.6 in)	1 May 1954
Jun	88.9 mm (3.5 in)	24 June 1898
Jul	83.8 mm (3.3 in)	14 July 1943
Aug	101.6 mm (4.0 in)	4 August 1914
Sep	73.7 mm (2.9 in)	9 September 1896
Oct	43.2 mm (1.7 in)	4 October 1903
Nov	38.1 mm (1.5 in)	17 November 1887
Dec	25.4 mm (1.0 in)	16 December 1902

Period of Record Coverage

1892 to 1954

49 years of record at Savanne, 1892 to 1954. 7 years have data for under 90 percent of days and are left out of rankings: 1900, 1901, 1906, 1918, 1937, 1946, 1954.

Days with data per year at Savanne
Year	Days with data	Share of year	Complete
1892	366	100%	Yes
1893	365	100%	Yes
1894	365	100%	Yes
1895	363	99%	Yes
1896	366	100%	Yes
1897	365	100%	Yes
1898	357	98%	Yes
1899	365	100%	Yes
1900	273	75%	No
1901	214	59%	No
1902	365	100%	Yes
1903	365	100%	Yes
1904	366	100%	Yes
1905	365	100%	Yes
1906	212	58%	No
1914	355	97%	Yes
1915	365	100%	Yes
1916	337	92%	Yes
1917	364	100%	Yes
1918	273	75%	No
1919	347	95%	Yes
1920	366	100%	Yes
1921	364	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	364	100%	Yes
1936	336	92%	Yes
1937	304	83%	No
1938	364	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	272	75%	No
1954	153	42%	No

Latest Records

Latest records at Savanne
Date	Station	Record	Value	Beat old record by	Old record stood	Significance
23 September 1954	Savanne, CA	daily low min (Tie)	-5.6 C (21.9 F)	tie	54 years	5 of 100 (Routine)
18 September 1954	Savanne, CA	daily rain	24.9 mm (1.0 in)	2.0 mm (0.08 in)	31 years	17 of 100 (Routine)
26 August 1954	Savanne, CA	daily low min (Tie)	-2.8 C (27.0 F)	tie	17 years	2 of 100 (Routine)
24 August 1954	Savanne, CA	daily high max (Tie)	30.0 C (86.0 F)	tie	16 years	2 of 100 (Routine)
24 June 1954	Savanne, CA	daily high max	31.7 C (89.1 F)	2.3 C (4.1 F)	53 years	26 of 100 (Routine)
17 June 1954	Savanne, CA	daily rain	26.2 mm (1.0 in)	5.4 mm (0.21 in)	17 years	17 of 100 (Routine)
16 June 1954	Savanne, CA	daily rain	42.9 mm (1.7 in)	27.7 mm (1.1 in)	32 years	43 of 100 (Notable)
14 June 1954	Savanne, CA	daily high min	18.9 C (66.0 F)	2.8 C (5.0 F)	59 years	28 of 100 (Routine)
11 June 1954	Savanne, CA	daily rain	33.0 mm (1.3 in)	16.5 mm (0.6 in)	20 years	29 of 100 (Routine)
29 May 1954	Savanne, CA	daily low max (Tie)	7.8 C (46.0 F)	tie	25 years	3 of 100 (Routine)
28 May 1954	Savanne, CA	daily low max	6.7 C (44.1 F)	1.1 C (2.0 F)	12 years	10 of 100 (Routine)
26 May 1954	Savanne, CA	daily low min (Tie)	-7.2 C (19.0 F)	tie	24 years	3 of 100 (Routine)
6 May 1954	Savanne, CA	daily low min	-13.3 C (8.1 F)	1.6 C (2.9 F)	29 years	16 of 100 (Routine)
4 May 1954	Savanne, CA	monthly low max	-4.4 C (24.1 F)	0.5 C (0.9 F)	9 years	18 of 100 (Routine)
3 May 1954	Savanne, CA	daily snowfall	23.9 cm (9.4 in)	22.6 cm (8.9 in)	28 years	55 of 100 (Notable)
3 May 1954	Savanne, CA	daily low max	-2.8 C (27.0 F)	1.7 C (3.1 F)	28 years	16 of 100 (Routine)
2 May 1954	Savanne, CA	daily rain	29.5 mm (1.2 in)	15.5 mm (0.6 in)	52 years	42 of 100 (Notable)
2 May 1954	Savanne, CA	monthly snowfall	29.5 cm (11.6 in)	6.6 cm (2.6 in)	0 years	30 of 100 (Routine)
2 May 1954	Savanne, CA	daily low max	0.0 C (32.0 F)	1.1 C (2.0 F)	24 years	14 of 100 (Routine)
1 May 1954	Savanne, CA	monthly rain	66.8 mm (2.6 in)	11.9 mm (0.5 in)	16 years	37 of 100 (Notable)

Climate Trend

39 complete years, 1892 to 1945

One stripe for each of 39 complete years at Savanne, 1892 to 1945. Blue stripes are years cooler than the station's own mean of -0.1 C (31.8 F); red stripes are warmer. The coolest year was 1917, at -2.9 C (26.8 F), and the warmest was 1931, at 2.2 C (36.0 F). The strongest colour marks a difference of 2.8 C (5.0 F).

Annual mean temperature at Savanne as warming stripes, 1892 to 1945
Year	Annual mean temperature	Difference from the station mean
1892	-0.3 C	-0.18 C
1893	-1.0 C	-0.92 C
1894	1.1 C	+1.21 C
1895	-0.4 C	-0.25 C
1896	-0.3 C	-0.13 C
1897	0.2 C	+0.35 C
1898	0.8 C	+0.96 C
1899	-0.8 C	-0.66 C
1902	1.0 C	+1.10 C
1903	-0.3 C	-0.17 C
1904	-1.2 C	-1.04 C
1905	-0.4 C	-0.30 C
1914	0.1 C	+0.20 C
1915	1.5 C	+1.60 C
1917	-2.9 C	-2.74 C
1920	-0.3 C	-0.19 C
1921	1.2 C	+1.33 C
1922	0.8 C	+0.93 C
1923	-1.0 C	-0.92 C
1924	-2.1 C	-2.02 C
1925	-0.9 C	-0.82 C
1926	-1.7 C	-1.60 C
1927	-1.2 C	-1.04 C
1928	0.5 C	+0.61 C
1929	-1.9 C	-1.80 C
1930	0.4 C	+0.56 C
1931	2.2 C	+2.37 C
1932	-0.3 C	-0.16 C
1933	-0.5 C	-0.42 C
1934	-0.7 C	-0.58 C
1935	-0.5 C	-0.40 C
1938	0.7 C	+0.84 C
1939	0.0 C	+0.13 C
1940	0.2 C	+0.30 C
1941	1.6 C	+1.73 C
1942	0.8 C	+0.94 C
1943	-0.2 C	-0.12 C
1944	1.1 C	+1.26 C
1945	-0.3 C	-0.14 C

The fitted trend in annual mean temperature here over 1892 to 1945 is 0.1 C (-0.1 to 0.3) per decade. The interval includes zero, so the trend is not clearly different from zero. In Fahrenheit: 0.1 F (-0.3 to 0.5) per decade. The slope is a straight line fitted to 39 complete years; the brackets give its 95 percent interval.

Fitted temperature trends per decade at Savanne
Measure	Per decade (C)	Per decade (F)	Period	Complete years	Reading
Annual mean temperature	0.1 C (-0.1 to 0.3) per decade	0.1 F (-0.3 to 0.5) per decade	1892 to 1945	39	Not clearly different from zero
Mean daily maximum	0.1 C (-0.1 to 0.3) per decade	0.1 F (-0.2 to 0.5) per decade	1892 to 1945	39	Not clearly different from zero
Mean daily minimum	0.1 C (-0.2 to 0.3) per decade	0.1 F (-0.3 to 0.6) per decade	1892 to 1945	39	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

1884 to 1954

Yearly extremes at Savanne: 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)	1901	31.7 C (89.1 F)	49
Coldest night (TNn)	-49.4 C (-56.9 F)	1930	-43.9 C (-47.0 F)	49
Wettest day (Rx1day)	101.6 mm (4.0 in)	1914	43.2 mm (1.7 in)	57
Wettest five days (Rx5day)	143.5 mm (5.6 in)	1898	64.8 mm (2.6 in)	57
Longest dry spell (CDD)	44 days	1887	22 days	57

Hottest day (TXx)

The hottest day of the year at Savanne, 1884 to 1954. The record is 38.3 C (100.9 F) in 1901, marked on the chart; the median year is 31.7 C (89.1 F).

Hottest day (TXx) at Savanne by year
Year	Hottest day (TXx)
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	32.2 C (90.0 F)
1893	36.7 C (98.1 F)
1894	33.3 C (91.9 F)
1895	29.4 C (84.9 F)
1896	32.2 C (90.0 F)
1897	31.7 C (89.1 F)
1898	31.7 C (89.1 F)
1899	31.1 C (88.0 F)
1900	34.4 C (93.9 F)
1901	38.3 C (100.9 F)
1902	31.7 C (89.1 F)
1903	33.9 C (93.0 F)
1904	29.4 C (84.9 F)
1905	28.9 C (84.0 F)
1906	32.2 C (90.0 F)
1914	33.3 C (91.9 F)
1915	30.0 C (86.0 F)
1916	35.6 C (96.1 F)
1917	33.3 C (91.9 F)
1918	28.3 C (82.9 F)
1919	32.2 C (90.0 F)
1920	30.0 C (86.0 F)
1921	34.4 C (93.9 F)
1922	31.1 C (88.0 F)
1923	31.1 C (88.0 F)
1924	28.9 C (84.0 F)
1925	30.6 C (87.1 F)
1926	29.4 C (84.9 F)
1927	31.7 C (89.1 F)
1928	28.9 C (84.0 F)
1929	32.8 C (91.0 F)
1930	31.1 C (88.0 F)
1931	36.1 C (97.0 F)
1932	31.7 C (89.1 F)
1933	36.1 C (97.0 F)
1934	30.0 C (86.0 F)
1935	31.7 C (89.1 F)
1936	37.8 C (100.0 F)
1937	33.9 C (93.0 F)
1938	30.6 C (87.1 F)
1939	31.7 C (89.1 F)
1940	32.2 C (90.0 F)
1941	32.8 C (91.0 F)
1942	30.0 C (86.0 F)
1943	31.7 C (89.1 F)
1944	30.6 C (87.1 F)
1945	31.7 C (89.1 F)
1946	29.4 C (84.9 F)
1954	31.7 C (89.1 F)

Coldest night (TNn)

The coldest night of the year at Savanne, 1884 to 1954. The record is -49.4 C (-56.9 F) in 1930, marked on the chart; the median year is -43.9 C (-47.0 F).

Coldest night (TNn) at Savanne by year
Year	Coldest night (TNn)
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	-43.9 C (-47.0 F)
1893	-43.9 C (-47.0 F)
1894	-41.7 C (-43.1 F)
1895	-46.7 C (-52.1 F)
1896	-45.0 C (-49.0 F)
1897	-45.6 C (-50.1 F)
1898	-42.2 C (-44.0 F)
1899	-48.3 C (-54.9 F)
1900	-42.2 C (-44.0 F)
1901	-38.3 C (-36.9 F)
1902	-40.6 C (-41.1 F)
1903	-42.2 C (-44.0 F)
1904	-43.3 C (-45.9 F)
1905	-38.9 C (-38.0 F)
1906	-43.9 C (-47.0 F)
1914	-47.2 C (-53.0 F)
1915	-44.4 C (-47.9 F)
1916	-45.6 C (-50.1 F)
1917	-42.8 C (-45.0 F)
1918	-43.9 C (-47.0 F)
1919	-43.9 C (-47.0 F)
1920	-43.3 C (-45.9 F)
1921	-39.4 C (-38.9 F)
1922	-44.4 C (-47.9 F)
1923	-46.7 C (-52.1 F)
1924	-43.9 C (-47.0 F)
1925	-43.9 C (-47.0 F)
1926	-44.4 C (-47.9 F)
1927	-47.2 C (-53.0 F)
1928	-42.8 C (-45.0 F)
1929	-43.3 C (-45.9 F)
1930	-49.4 C (-56.9 F)
1931	-41.7 C (-43.1 F)
1932	-43.9 C (-47.0 F)
1933	-49.4 C (-56.9 F)
1934	-48.9 C (-56.0 F)
1935	-46.1 C (-51.0 F)
1936	-43.9 C (-47.0 F)
1937	-46.1 C (-51.0 F)
1938	-44.4 C (-47.9 F)
1939	-46.7 C (-52.1 F)
1940	-41.1 C (-42.0 F)
1941	-40.0 C (-40.0 F)
1942	-42.2 C (-44.0 F)
1943	-46.7 C (-52.1 F)
1944	-43.3 C (-45.9 F)
1945	-42.2 C (-44.0 F)
1946	-38.9 C (-38.0 F)
1954	-13.3 C (8.1 F)

Wettest day (Rx1day)

The wettest day of the year at Savanne, 1884 to 1954. The record is 101.6 mm (4.0 in) in 1914, marked on the chart; the median year is 43.2 mm (1.7 in).

Wettest day (Rx1day) at Savanne by year
Year	Wettest day (Rx1day)
1884	20.3 mm (0.8 in)
1885	33.5 mm (1.3 in)
1886	30.5 mm (1.2 in)
1887	44.5 mm (1.8 in)
1888	26.7 mm (1.1 in)
1889	39.4 mm (1.6 in)
1890	27.9 mm (1.1 in)
1891	50.8 mm (2.0 in)
1892	57.4 mm (2.3 in)
1893	53.3 mm (2.1 in)
1894	35.6 mm (1.4 in)
1895	43.2 mm (1.7 in)
1896	73.7 mm (2.9 in)
1897	66.0 mm (2.6 in)
1898	88.9 mm (3.5 in)
1899	38.1 mm (1.5 in)
1900	53.3 mm (2.1 in)
1901	48.3 mm (1.9 in)
1902	35.6 mm (1.4 in)
1903	43.2 mm (1.7 in)
1904	35.6 mm (1.4 in)
1905	40.6 mm (1.6 in)
1906	40.6 mm (1.6 in)
1914	101.6 mm (4.0 in)
1915	25.4 mm (1.0 in)
1916	45.7 mm (1.8 in)
1917	47.0 mm (1.9 in)
1918	34.3 mm (1.4 in)
1919	31.0 mm (1.2 in)
1920	64.3 mm (2.5 in)
1921	68.6 mm (2.7 in)
1922	48.8 mm (1.9 in)
1923	45.7 mm (1.8 in)
1924	35.6 mm (1.4 in)
1925	30.0 mm (1.2 in)
1926	48.8 mm (1.9 in)
1927	30.5 mm (1.2 in)
1928	37.6 mm (1.5 in)
1929	44.5 mm (1.8 in)
1930	30.5 mm (1.2 in)
1931	48.0 mm (1.9 in)
1932	41.9 mm (1.6 in)
1933	40.6 mm (1.6 in)
1934	25.4 mm (1.0 in)
1935	46.2 mm (1.8 in)
1936	33.0 mm (1.3 in)
1937	62.5 mm (2.5 in)
1938	50.0 mm (2.0 in)
1939	63.5 mm (2.5 in)
1940	42.7 mm (1.7 in)
1941	58.4 mm (2.3 in)
1942	48.0 mm (1.9 in)
1943	83.8 mm (3.3 in)
1944	58.9 mm (2.3 in)
1945	30.5 mm (1.2 in)
1946	29.5 mm (1.2 in)
1954	66.8 mm (2.6 in)

Wettest five days (Rx5day)

The wettest five days of the year at Savanne, 1884 to 1954. The record is 143.5 mm (5.6 in) in 1898, marked on the chart; the median year is 64.8 mm (2.6 in).

Wettest five days (Rx5day) at Savanne by year
Year	Wettest five days (Rx5day)
1884	43.1 mm (1.7 in)
1885	51.8 mm (2.0 in)
1886	46.8 mm (1.8 in)
1887	57.2 mm (2.3 in)
1888	81.8 mm (3.2 in)
1889	67.4 mm (2.7 in)
1890	45.7 mm (1.8 in)
1891	83.8 mm (3.3 in)
1892	86.6 mm (3.4 in)
1893	57.1 mm (2.2 in)
1894	59.8 mm (2.4 in)
1895	54.4 mm (2.1 in)
1896	87.7 mm (3.5 in)
1897	88.9 mm (3.5 in)
1898	143.5 mm (5.6 in)
1899	57.1 mm (2.2 in)
1900	92.7 mm (3.6 in)
1901	64.8 mm (2.6 in)
1902	85.1 mm (3.4 in)
1903	77.5 mm (3.1 in)
1904	52.0 mm (2.0 in)
1905	63.5 mm (2.5 in)
1906	59.7 mm (2.4 in)
1914	139.7 mm (5.5 in)
1915	63.5 mm (2.5 in)
1916	52.1 mm (2.1 in)
1917	55.9 mm (2.2 in)
1918	47.2 mm (1.9 in)
1919	47.0 mm (1.9 in)
1920	82.4 mm (3.2 in)
1921	82.0 mm (3.2 in)
1922	57.3 mm (2.3 in)
1923	72.1 mm (2.8 in)
1924	61.5 mm (2.4 in)
1925	45.2 mm (1.8 in)
1926	67.9 mm (2.7 in)
1927	75.5 mm (3.0 in)
1928	51.8 mm (2.0 in)
1929	56.7 mm (2.2 in)
1930	44.9 mm (1.8 in)
1931	61.3 mm (2.4 in)
1932	71.1 mm (2.8 in)
1933	65.5 mm (2.6 in)
1934	42.1 mm (1.7 in)
1935	63.6 mm (2.5 in)
1936	59.7 mm (2.4 in)
1937	96.1 mm (3.8 in)
1938	111.7 mm (4.4 in)
1939	77.2 mm (3.0 in)
1940	74.4 mm (2.9 in)
1941	123.9 mm (4.9 in)
1942	56.2 mm (2.2 in)
1943	87.9 mm (3.5 in)
1944	96.9 mm (3.8 in)
1945	68.9 mm (2.7 in)
1946	78.3 mm (3.1 in)
1954	126.3 mm (5.0 in)

Longest dry spell (CDD)

The longest dry spell of the year at Savanne, 1884 to 1954. The record is 44 days in 1887, marked on the chart; the median year is 22 days.

Longest dry spell (CDD) at Savanne by year
Year	Longest dry spell (CDD)
1884	5 days
1885	28 days
1886	38 days
1887	44 days
1888	19 days
1889	20 days
1890	19 days
1891	28 days
1892	31 days
1893	23 days
1894	25 days
1895	19 days
1896	30 days
1897	19 days
1898	21 days
1899	35 days
1900	40 days
1901	20 days
1902	20 days
1903	28 days
1904	29 days
1905	25 days
1906	18 days
1914	32 days
1915	37 days
1916	29 days
1917	26 days
1918	18 days
1919	16 days
1920	22 days
1921	19 days
1922	18 days
1923	21 days
1924	37 days
1925	24 days
1926	17 days
1927	17 days
1928	43 days
1929	22 days
1930	26 days
1931	38 days
1932	22 days
1933	15 days
1934	21 days
1935	21 days
1936	28 days
1937	13 days
1938	35 days
1939	22 days
1940	24 days
1941	19 days
1942	23 days
1943	24 days
1944	19 days
1945	17 days
1946	19 days
1954	13 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

39 years with a frost

Across 39 years with a frost, the median last spring frost at Savanne falls on 23 June and the median first autumn frost on 16 July, which leaves a median of 23 days between them.

Fitted over all years, the growing season changes by -1.5 days per decade at this station.

Frost dates and growing season at Savanne
Measure	Median, all years	Earliest period	Recent period (1903 to 1945)	Recent against earliest	Fitted trend
Last spring frost	23 June	n/a	24 June	n/a	-0.3 days per decade
First autumn frost	16 July	n/a	13 July	n/a	-1.8 days per decade
Growing days	23 days	n/a	22 days	n/a	-1.5 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

48 years, 1885 to 1945

A day with at least 43.0 mm (1.7 in) of rain is expected about once in 2 years. A day with at least 108.4 mm (4.3 in) of rain is expected about once in 100 years.

Rainfall return levels at Savanne: the daily rain expected about once in a given number of years
Expected about once in	A day with at least	Note
2 years	43.0 mm (1.7 in)
5 years	57.2 mm (2.3 in)
10 years	67.7 mm (2.7 in)
25 years	82.7 mm (3.3 in)
50 years	95.0 mm (3.7 in)	Longer than the 48 years of record
100 years	108.4 mm (4.3 in)	Longer than the 48 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, 48 years of values from 1885 to 1945.

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: 101.6 mm (4.0 in) in 1914; 88.9 mm (3.5 in) in 1898; 83.8 mm (3.3 in) in 1943.

Download the Data

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