Baton Rouge Weather Records (USC00160555)

Record envelope, standing records and threshold days for Baton Rouge (USC00160555), Louisiana, United States, with 87 years of record.

Key Facts for Baton Rouge

Baton Rouge (USC00160555) is a weather station in Louisiana, United States at 30.43 latitude and -91.21 longitude, 6 m (20 ft) above sea level.
The station reports from 1892 to 1978, 87 years of record.
1,464 records set at Baton Rouge still stand.
Records are tracked for tmax, tmin, prcp: an element needs 30 years of data to be eligible.
Baton Rouge set a daily record precipitation of 50.8 mm (2.0 in) on 27 November 1978.

About the Station

Location: Louisiana, United States, 30.43 latitude, -91.21 longitude.
Elevation: 6 m (20 ft).
Period of record: 1892 to 1978, 87 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 Baton Rouge. 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 Baton Rouge, with 2026 drawn through them
Month	Highest record high	Lowest record low	2026 highest maximum	2026 lowest minimum
Jan	29.4 C (84.9 F)	-11.7 C (10.9 F)	n/a	n/a
Feb	31.1 C (88.0 F)	-16.7 C (1.9 F)	n/a	n/a
Mar	33.9 C (93.0 F)	-5.0 C (23.0 F)	n/a	n/a
Apr	35.6 C (96.1 F)	-0.6 C (30.9 F)	n/a	n/a
May	38.3 C (100.9 F)	4.4 C (39.9 F)	n/a	n/a
Jun	39.4 C (102.9 F)	12.2 C (54.0 F)	n/a	n/a
Jul	39.4 C (102.9 F)	16.1 C (61.0 F)	n/a	n/a
Aug	43.3 C (109.9 F)	16.1 C (61.0 F)	n/a	n/a
Sep	38.9 C (102.0 F)	6.1 C (43.0 F)	n/a	n/a
Oct	36.7 C (98.1 F)	-0.6 C (30.9 F)	n/a	n/a
Nov	31.7 C (89.1 F)	-5.6 C (21.9 F)	n/a	n/a
Dec	31.1 C (88.0 F)	-10.0 C (14.0 F)	n/a	n/a

Which Years Hold Standing Records

1,464 standing records

1,464 records at Baton Rouge still stand. 1921 holds the most, with 69.

Standing records at Baton Rouge by the year they were set
Year set	Standing records
1892	4
1893	24
1894	28
1895	25
1896	24
1897	29
1898	29
1899	31
1900	16
1901	25
1902	15
1903	28
1904	30
1905	27
1906	22
1907	56
1908	58
1909	68
1910	25
1911	43
1912	22
1913	30
1914	28
1915	24
1916	22
1917	36
1918	21
1919	21
1920	25
1921	69
1922	35
1923	12
1924	28
1925	26
1926	11
1927	25
1928	23
1929	28
1930	18
1931	22
1932	35
1933	26
1934	20
1935	20
1936	21
1937	24
1938	19
1939	15
1940	38
1941	16
1942	15
1943	25
1944	18
1945	16
1946	17
1947	6

Wettest Day of Each Month

Dec: 223.0 mm (8.8 in)

The wettest day on record for each calendar month at Baton Rouge. The most was 223.0 mm (8.8 in) on 7 December 1912.

Record daily precipitation for each month at Baton Rouge
Month	Record daily precipitation (mm)	Date
Jan	125.2 mm (4.9 in)	9 January 1900
Feb	129.5 mm (5.1 in)	12 February 1905
Mar	185.2 mm (7.3 in)	13 March 1947
Apr	161.5 mm (6.4 in)	8 April 1942
May	205.7 mm (8.1 in)	8 May 1907
Jun	203.2 mm (8.0 in)	5 June 1928
Jul	160.8 mm (6.3 in)	15 July 1914
Aug	190.5 mm (7.5 in)	26 August 1926
Sep	127.0 mm (5.0 in)	21 September 1909
Oct	131.8 mm (5.2 in)	28 October 1896
Nov	182.9 mm (7.2 in)	13 November 1929
Dec	223.0 mm (8.8 in)	7 December 1912

Period of Record Coverage

1892 to 1947

56 years of record at Baton Rouge, 1892 to 1947. 4 years have data for under 90 percent of days and are left out of rankings: 1892, 1893, 1922, 1947.

Days with data per year at Baton Rouge
Year	Days with data	Share of year	Complete
1892	60	16%	No
1893	315	86%	No
1894	363	99%	Yes
1895	356	98%	Yes
1896	366	100%	Yes
1897	357	98%	Yes
1898	352	96%	Yes
1899	356	98%	Yes
1900	360	99%	Yes
1901	341	93%	Yes
1902	362	99%	Yes
1903	356	98%	Yes
1904	364	99%	Yes
1905	338	93%	Yes
1906	334	92%	Yes
1907	358	98%	Yes
1908	355	97%	Yes
1909	357	98%	Yes
1910	331	91%	Yes
1911	358	98%	Yes
1912	364	99%	Yes
1913	363	99%	Yes
1914	365	100%	Yes
1915	355	97%	Yes
1916	352	96%	Yes
1917	339	93%	Yes
1918	355	97%	Yes
1919	345	95%	Yes
1920	351	96%	Yes
1921	345	95%	Yes
1922	319	87%	No
1923	361	99%	Yes
1924	363	99%	Yes
1925	365	100%	Yes
1926	348	95%	Yes
1927	363	99%	Yes
1928	364	99%	Yes
1929	358	98%	Yes
1930	332	91%	Yes
1931	363	99%	Yes
1932	357	98%	Yes
1933	364	100%	Yes
1934	363	99%	Yes
1935	350	96%	Yes
1936	364	99%	Yes
1937	364	100%	Yes
1938	357	98%	Yes
1939	365	100%	Yes
1940	359	98%	Yes
1941	364	100%	Yes
1942	364	100%	Yes
1943	362	99%	Yes
1944	365	100%	Yes
1945	361	99%	Yes
1946	364	100%	Yes
1947	151	41%	No

Latest Records

Latest records at Baton Rouge
Date	Station	Record	Value	Beat old record by	Old record stood	Significance
27 November 1978	Baton Rouge, US	daily rain	50.8 mm (2.0 in)	10.2 mm (0.4 in)	64 years	32 of 100 (Routine)
30 August 1978	Baton Rouge, US	daily rain	34.5 mm (1.4 in)	16.2 mm (0.6 in)	60 years	36 of 100 (Notable)
29 August 1978	Baton Rouge, US	daily rain	60.7 mm (2.4 in)	19.3 mm (0.8 in)	40 years	32 of 100 (Routine)
28 July 1978	Baton Rouge, US	daily rain	95.3 mm (3.8 in)	53.6 mm (2.1 in)	41 years	54 of 100 (Notable)
28 June 1978	Baton Rouge, US	daily rain	41.4 mm (1.6 in)	3.6 mm (0.14 in)	76 years	33 of 100 (Routine)
3 May 1978	Baton Rouge, US	daily rain	50.8 mm (2.0 in)	14.0 mm (0.6 in)	56 years	29 of 100 (Routine)
14 January 1977	Baton Rouge, US	daily rain	58.2 mm (2.3 in)	25.9 mm (1.0 in)	60 years	41 of 100 (Notable)
23 September 1955	Baton Rouge, US	daily rain	35.3 mm (1.4 in)	17.5 mm (0.7 in)	26 years	24 of 100 (Routine)
30 May 1947	Baton Rouge, US	daily low max	23.3 C (73.9 F)	2.3 C (4.1 F)	40 years	24 of 100 (Routine)
21 May 1947	Baton Rouge, US	daily low max (Tie)	24.4 C (75.9 F)	tie	14 years	2 of 100 (Routine)
1 May 1947	Baton Rouge, US	daily high min (Tie)	22.8 C (73.0 F)	tie	13 years	2 of 100 (Routine)
13 March 1947	Baton Rouge, US	monthly rain	185.2 mm (7.3 in)	76.0 mm (3.0 in)	34 years	65 of 100 (Major)
7 March 1947	Baton Rouge, US	daily low max (Tie)	10.0 C (50.0 F)	tie	34 years	3 of 100 (Routine)
6 March 1947	Baton Rouge, US	daily rain	48.3 mm (1.9 in)	4.9 mm (0.19 in)	4 years	8 of 100 (Routine)
2 March 1947	Baton Rouge, US	daily low max (Tie)	8.9 C (48.0 F)	tie	24 years	3 of 100 (Routine)
2 March 1947	Baton Rouge, US	daily low min (Tie)	-1.1 C (30.0 F)	tie	9 years	1 of 100 (Routine)
28 February 1947	Baton Rouge, US	daily low max	11.1 C (52.0 F)	1.1 C (2.0 F)	4 years	8 of 100 (Routine)
10 February 1947	Baton Rouge, US	daily low min	-5.6 C (21.9 F)	3.4 C (6.1 F)	5 years	11 of 100 (Routine)
15 January 1947	Baton Rouge, US	daily high max	27.2 C (81.0 F)	0.5 C (0.9 F)	15 years	9 of 100 (Routine)
15 January 1947	Baton Rouge, US	daily high min	21.1 C (70.0 F)	0.5 C (0.9 F)	15 years	9 of 100 (Routine)

Climate Trend

42 complete years, 1894 to 1946

One stripe for each of 42 complete years at Baton Rouge, 1894 to 1946. Blue stripes are years cooler than the station's own mean of 20.1 C (68.1 F); red stripes are warmer. The coolest year was 1903, at 18.9 C (66.0 F), and the warmest was 1921, at 22.2 C (71.9 F). The strongest colour marks a difference of 2.2 C (4.0 F).

Annual mean temperature at Baton Rouge as warming stripes, 1894 to 1946
Year	Annual mean temperature	Difference from the station mean
1894	19.9 C	-0.16 C
1895	19.2 C	-0.86 C
1896	20.2 C	+0.13 C
1897	20.4 C	+0.32 C
1898	19.6 C	-0.47 C
1899	19.6 C	-0.45 C
1900	20.0 C	-0.06 C
1901	19.0 C	-1.06 C
1902	19.5 C	-0.62 C
1903	18.9 C	-1.19 C
1904	20.1 C	+0.03 C
1907	20.1 C	+0.00 C
1908	19.3 C	-0.81 C
1909	19.6 C	-0.50 C
1911	21.5 C	+1.40 C
1912	19.5 C	-0.55 C
1913	20.2 C	+0.08 C
1914	19.8 C	-0.24 C
1915	20.0 C	-0.04 C
1920	20.2 C	+0.15 C
1921	22.2 C	+2.11 C
1923	20.4 C	+0.27 C
1924	20.3 C	+0.18 C
1925	21.1 C	+0.98 C
1927	21.4 C	+1.29 C
1928	19.7 C	-0.41 C
1929	19.8 C	-0.33 C
1931	20.4 C	+0.27 C
1932	20.2 C	+0.08 C
1933	21.1 C	+0.98 C
1934	20.0 C	-0.11 C
1936	19.7 C	-0.39 C
1937	19.8 C	-0.25 C
1938	20.4 C	+0.27 C
1939	20.4 C	+0.31 C
1940	18.9 C	-1.18 C
1941	20.2 C	+0.09 C
1942	19.8 C	-0.25 C
1943	20.0 C	-0.07 C
1944	20.3 C	+0.22 C
1945	20.5 C	+0.42 C
1946	20.5 C	+0.41 C

The fitted trend in annual mean temperature here over 1894 to 1946 is 0.10 C (-0.02 to 0.23) per decade. The interval includes zero, so the trend is not clearly different from zero. In Fahrenheit: 0.19 F (-0.03 to 0.41) per decade. The slope is a straight line fitted to 42 complete years; the brackets give its 95 percent interval.

Fitted temperature trends per decade at Baton Rouge
Measure	Per decade (C)	Per decade (F)	Period	Complete years	Reading
Annual mean temperature	0.10 C (-0.02 to 0.23) per decade	0.19 F (-0.03 to 0.41) per decade	1894 to 1946	42	Not clearly different from zero
Mean daily maximum	-0.04 C (-0.19 to 0.10) per decade	-0.1 F (-0.3 to 0.2) per decade	1894 to 1946	42	Not clearly different from zero
Mean daily minimum	0.3 C (0.1 to 0.4) per decade	0.5 F (0.1 to 0.8) per decade	1894 to 1946	42	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

1892 to 1978

Yearly extremes at Baton Rouge: the record and the median year
Measure	Record	Year of the record	Median year	Years with a value
Hottest day (TXx)	43.3 C (109.9 F)	1909	37.0 C (98.5 F)	56
Coldest night (TNn)	-16.7 C (1.9 F)	1899	-5.8 C (21.5 F)	56
Wettest day (Rx1day)	223.0 mm (8.8 in)	1912	83.8 mm (3.3 in)	63
Wettest five days (Rx5day)	364.7 mm (14.4 in)	1908	127.1 mm (5.0 in)	61
Longest dry spell (CDD)	48 days	1924	21 days	62

Hottest day (TXx)

The hottest day of the year at Baton Rouge, 1892 to 1978. The record is 43.3 C (109.9 F) in 1909, marked on the chart; the median year is 37.0 C (98.5 F).

Hottest day (TXx) at Baton Rouge by year
Year	Hottest day (TXx)
1892	36.1 C (97.0 F)
1893	34.4 C (93.9 F)
1894	37.8 C (100.0 F)
1895	36.7 C (98.1 F)
1896	36.7 C (98.1 F)
1897	37.2 C (99.0 F)
1898	36.1 C (97.0 F)
1899	37.2 C (99.0 F)
1900	36.7 C (98.1 F)
1901	39.4 C (102.9 F)
1902	37.2 C (99.0 F)
1903	35.0 C (95.0 F)
1904	36.7 C (98.1 F)
1905	37.8 C (100.0 F)
1906	37.2 C (99.0 F)
1907	38.3 C (100.9 F)
1908	37.2 C (99.0 F)
1909	43.3 C (109.9 F)
1910	36.1 C (97.0 F)
1911	37.2 C (99.0 F)
1912	37.2 C (99.0 F)
1913	36.1 C (97.0 F)
1914	39.4 C (102.9 F)
1915	36.7 C (98.1 F)
1916	36.1 C (97.0 F)
1917	36.7 C (98.1 F)
1918	37.8 C (100.0 F)
1919	37.8 C (100.0 F)
1920	37.2 C (99.0 F)
1921	39.4 C (102.9 F)
1922	38.3 C (100.9 F)
1923	35.6 C (96.1 F)
1924	38.9 C (102.0 F)
1925	37.8 C (100.0 F)
1926	37.2 C (99.0 F)
1927	36.7 C (98.1 F)
1928	36.7 C (98.1 F)
1929	35.0 C (95.0 F)
1930	37.8 C (100.0 F)
1931	37.8 C (100.0 F)
1932	37.2 C (99.0 F)
1933	38.3 C (100.9 F)
1934	36.1 C (97.0 F)
1935	37.2 C (99.0 F)
1936	36.7 C (98.1 F)
1937	35.6 C (96.1 F)
1938	37.2 C (99.0 F)
1939	36.7 C (98.1 F)
1940	35.6 C (96.1 F)
1941	36.7 C (98.1 F)
1942	36.1 C (97.0 F)
1943	37.8 C (100.0 F)
1944	36.1 C (97.0 F)
1945	35.6 C (96.1 F)
1946	36.1 C (97.0 F)
1947	32.2 C (90.0 F)
1955	n/a
1956	n/a
1958	n/a
1975	n/a
1976	n/a
1977	n/a
1978	n/a

Coldest night (TNn)

The coldest night of the year at Baton Rouge, 1892 to 1978. The record is -16.7 C (1.9 F) in 1899, marked on the chart; the median year is -5.8 C (21.5 F).

Coldest night (TNn) at Baton Rouge by year
Year	Coldest night (TNn)
1892	2.2 C (36.0 F)
1893	-3.9 C (25.0 F)
1894	-10.0 C (14.0 F)
1895	-11.7 C (10.9 F)
1896	-6.7 C (19.9 F)
1897	-6.7 C (19.9 F)
1898	-5.6 C (21.9 F)
1899	-16.7 C (1.9 F)
1900	-6.7 C (19.9 F)
1901	-8.9 C (16.0 F)
1902	-4.4 C (24.1 F)
1903	-5.6 C (21.9 F)
1904	-7.8 C (18.0 F)
1905	-9.4 C (15.1 F)
1906	-5.0 C (23.0 F)
1907	-5.0 C (23.0 F)
1908	-5.6 C (21.9 F)
1909	-7.2 C (19.0 F)
1910	-6.7 C (19.9 F)
1911	-6.1 C (21.0 F)
1912	-7.8 C (18.0 F)
1913	-2.2 C (28.0 F)
1914	-5.0 C (23.0 F)
1915	-3.3 C (26.1 F)
1916	-4.4 C (24.1 F)
1917	-10.0 C (14.0 F)
1918	-11.7 C (10.9 F)
1919	-7.2 C (19.0 F)
1920	-3.9 C (25.0 F)
1921	1.1 C (34.0 F)
1922	-1.1 C (30.0 F)
1923	-2.2 C (28.0 F)
1924	-9.4 C (15.1 F)
1925	-6.7 C (19.9 F)
1926	-1.7 C (28.9 F)
1927	-5.6 C (21.9 F)
1928	-7.8 C (18.0 F)
1929	-5.6 C (21.9 F)
1930	-8.3 C (17.1 F)
1931	-1.7 C (28.9 F)
1932	-5.0 C (23.0 F)
1933	-8.3 C (17.1 F)
1934	-7.2 C (19.0 F)
1935	-7.2 C (19.0 F)
1936	-6.7 C (19.9 F)
1937	-5.6 C (21.9 F)
1938	-5.0 C (23.0 F)
1939	-3.9 C (25.0 F)
1940	-9.4 C (15.1 F)
1941	-3.9 C (25.0 F)
1942	-7.2 C (19.0 F)
1943	-6.7 C (19.9 F)
1944	-5.0 C (23.0 F)
1945	-6.7 C (19.9 F)
1946	-5.0 C (23.0 F)
1947	-5.6 C (21.9 F)
1955	n/a
1956	n/a
1958	n/a
1975	n/a
1976	n/a
1977	n/a
1978	n/a

Wettest day (Rx1day)

The wettest day of the year at Baton Rouge, 1892 to 1978. The record is 223.0 mm (8.8 in) in 1912, marked on the chart; the median year is 83.8 mm (3.3 in).

Wettest day (Rx1day) at Baton Rouge by year
Year	Wettest day (Rx1day)
1892	60.5 mm (2.4 in)
1893	118.6 mm (4.7 in)
1894	76.2 mm (3.0 in)
1895	83.8 mm (3.3 in)
1896	131.8 mm (5.2 in)
1897	108.0 mm (4.3 in)
1898	102.6 mm (4.0 in)
1899	39.9 mm (1.6 in)
1900	125.2 mm (4.9 in)
1901	63.5 mm (2.5 in)
1902	62.5 mm (2.5 in)
1903	78.7 mm (3.1 in)
1904	83.8 mm (3.3 in)
1905	129.5 mm (5.1 in)
1906	69.9 mm (2.8 in)
1907	205.7 mm (8.1 in)
1908	167.6 mm (6.6 in)
1909	127.0 mm (5.0 in)
1910	63.5 mm (2.5 in)
1911	88.9 mm (3.5 in)
1912	223.0 mm (8.8 in)
1913	109.2 mm (4.3 in)
1914	160.8 mm (6.3 in)
1915	102.9 mm (4.1 in)
1916	126.5 mm (5.0 in)
1917	58.4 mm (2.3 in)
1918	70.1 mm (2.8 in)
1919	80.8 mm (3.2 in)
1920	61.7 mm (2.4 in)
1921	54.6 mm (2.1 in)
1922	50.8 mm (2.0 in)
1923	86.4 mm (3.4 in)
1924	86.9 mm (3.4 in)
1925	78.7 mm (3.1 in)
1926	190.5 mm (7.5 in)
1927	75.2 mm (3.0 in)
1928	203.2 mm (8.0 in)
1929	182.9 mm (7.2 in)
1930	91.4 mm (3.6 in)
1931	88.1 mm (3.5 in)
1932	76.2 mm (3.0 in)
1933	61.0 mm (2.4 in)
1934	99.1 mm (3.9 in)
1935	101.1 mm (4.0 in)
1936	62.0 mm (2.4 in)
1937	81.8 mm (3.2 in)
1938	58.4 mm (2.3 in)
1939	57.7 mm (2.3 in)
1940	94.0 mm (3.7 in)
1941	53.8 mm (2.1 in)
1942	161.5 mm (6.4 in)
1943	94.5 mm (3.7 in)
1944	87.6 mm (3.4 in)
1945	62.0 mm (2.4 in)
1946	79.8 mm (3.1 in)
1947	185.2 mm (7.3 in)
1955	35.3 mm (1.4 in)
1956	25.4 mm (1.0 in)
1958	0.0 mm (0.00 in)
1975	28.4 mm (1.1 in)
1976	89.9 mm (3.5 in)
1977	58.2 mm (2.3 in)
1978	95.3 mm (3.8 in)

Wettest five days (Rx5day)

The wettest five days of the year at Baton Rouge, 1892 to 1978. The record is 364.7 mm (14.4 in) in 1908, marked on the chart; the median year is 127.1 mm (5.0 in).

Wettest five days (Rx5day) at Baton Rouge by year
Year	Wettest five days (Rx5day)
1892	152.7 mm (6.0 in)
1893	165.9 mm (6.5 in)
1894	164.8 mm (6.5 in)
1895	95.2 mm (3.7 in)
1896	171.9 mm (6.8 in)
1897	177.1 mm (7.0 in)
1898	119.4 mm (4.7 in)
1899	94.5 mm (3.7 in)
1900	176.0 mm (6.9 in)
1901	107.0 mm (4.2 in)
1902	100.4 mm (4.0 in)
1903	126.5 mm (5.0 in)
1904	105.2 mm (4.1 in)
1905	202.5 mm (8.0 in)
1906	105.4 mm (4.1 in)
1907	266.7 mm (10.5 in)
1908	364.7 mm (14.4 in)
1909	130.8 mm (5.1 in)
1910	80.0 mm (3.1 in)
1911	231.2 mm (9.1 in)
1912	225.5 mm (8.9 in)
1913	161.5 mm (6.4 in)
1914	262.1 mm (10.3 in)
1915	177.8 mm (7.0 in)
1916	193.8 mm (7.6 in)
1917	97.9 mm (3.9 in)
1918	127.1 mm (5.0 in)
1919	126.0 mm (5.0 in)
1920	98.3 mm (3.9 in)
1921	81.3 mm (3.2 in)
1922	110.0 mm (4.3 in)
1923	134.4 mm (5.3 in)
1924	99.6 mm (3.9 in)
1925	173.9 mm (6.8 in)
1926	250.2 mm (9.9 in)
1927	108.7 mm (4.3 in)
1928	275.3 mm (10.8 in)
1929	286.1 mm (11.3 in)
1930	148.4 mm (5.8 in)
1931	107.3 mm (4.2 in)
1932	154.6 mm (6.1 in)
1933	79.8 mm (3.1 in)
1934	149.4 mm (5.9 in)
1935	136.2 mm (5.4 in)
1936	100.9 mm (4.0 in)
1937	95.8 mm (3.8 in)
1938	86.4 mm (3.4 in)
1939	121.5 mm (4.8 in)
1940	175.2 mm (6.9 in)
1941	86.8 mm (3.4 in)
1942	190.2 mm (7.5 in)
1943	193.6 mm (7.6 in)
1944	122.9 mm (4.8 in)
1945	116.8 mm (4.6 in)
1946	211.1 mm (8.3 in)
1947	213.4 mm (8.4 in)
1955	59.7 mm (2.4 in)
1956	41.7 mm (1.6 in)
1958	n/a
1975	40.6 mm (1.6 in)
1976	115.0 mm (4.5 in)
1977	n/a
1978	98.2 mm (3.9 in)

Longest dry spell (CDD)

The longest dry spell of the year at Baton Rouge, 1892 to 1978. The record is 48 days in 1924, marked on the chart; the median year is 21 days.

Longest dry spell (CDD) at Baton Rouge by year
Year	Longest dry spell (CDD)
1892	1 day
1893	21 days
1894	25 days
1895	19 days
1896	20 days
1897	22 days
1898	39 days
1899	30 days
1900	30 days
1901	24 days
1902	15 days
1903	32 days
1904	25 days
1905	19 days
1906	28 days
1907	19 days
1908	19 days
1909	29 days
1910	20 days
1911	26 days
1912	14 days
1913	19 days
1914	22 days
1915	26 days
1916	33 days
1917	33 days
1918	24 days
1919	13 days
1920	16 days
1921	24 days
1922	20 days
1923	22 days
1924	48 days
1925	18 days
1926	14 days
1927	21 days
1928	22 days
1929	20 days
1930	33 days
1931	21 days
1932	17 days
1933	24 days
1934	16 days
1935	23 days
1936	19 days
1937	23 days
1938	16 days
1939	16 days
1940	35 days
1941	18 days
1942	17 days
1943	23 days
1944	27 days
1945	28 days
1946	18 days
1947	31 days
1955	14 days
1956	18 days
1958	1 day
1975	13 days
1976	19 days
1977	n/a
1978	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 Baton Rouge falls on 22 February and the median first autumn frost on 18 November, which leaves a median of 273 days between them.

Fitted over all years, the growing season changes by +1.9 days per decade at this station.

Frost dates and growing season at Baton Rouge
Measure	Median, all years	Earliest period	Recent period (1903 to 1946)	Recent against earliest	Fitted trend
Last spring frost	22 February	n/a	22 February	n/a	-0.1 days per decade
First autumn frost	18 November	n/a	19 November	n/a	+1.8 days per decade
Growing days	273 days	n/a	276 days	n/a	+1.9 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, 1894 to 1946

A day with at least 85.1 mm (3.4 in) of rain is expected about once in 2 years. A day with at least 293.7 mm (11.6 in) of rain is expected about once in 100 years.

Rainfall return levels at Baton Rouge: the daily rain expected about once in a given number of years
Expected about once in	A day with at least	Note
2 years	85.1 mm (3.4 in)
5 years	122.7 mm (4.8 in)
10 years	153.7 mm (6.1 in)
25 years	201.3 mm (7.9 in)
50 years	243.9 mm (9.6 in)	Longer than the 48 years of record
100 years	293.7 mm (11.6 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 1894 to 1946.

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: 223.0 mm (8.8 in) in 1912; 205.7 mm (8.1 in) in 1907; 203.2 mm (8.0 in) in 1928.

Station Changes

No change in the annual mean temperature of this station was found against its neighbours.

Download the Data

Data for Baton Rouge standing records by year: CSV or JSON. Field meanings are on the data page.
Data for Baton Rouge 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).