New London Weather Records (USC00065309)

Record envelope, standing records and threshold days for New London (USC00065309), Connecticut, United States, with 61 years of record.

Key Facts for New London

New London (USC00065309) is a weather station in Connecticut, United States at 41.35 latitude and -72.10 longitude, 18 m (60 ft) above sea level.
The station reports from 1895 to 1955, 61 years of record.
1,464 records set at New London still stand.
Records are tracked for tmax, tmin, prcp: an element needs 30 years of data to be eligible.
New London set a daily record precipitation of 38.1 mm (1.5 in) on 29 September 1955.

About the Station

Location: Connecticut, United States, 41.35 latitude, -72.10 longitude.
Elevation: 18 m (60 ft).
Period of record: 1895 to 1955, 61 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 New London. 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 New London, with 2026 drawn through them
Month	Highest record high	Lowest record low	2026 highest maximum	2026 lowest minimum
Jan	19.4 C (66.9 F)	-21.7 C (-7.1 F)	n/a	n/a
Feb	20.0 C (68.0 F)	-27.2 C (-17.0 F)	n/a	n/a
Mar	28.9 C (84.0 F)	-16.1 C (3.0 F)	n/a	n/a
Apr	32.8 C (91.0 F)	-10.6 C (12.9 F)	n/a	n/a
May	33.9 C (93.0 F)	0.6 C (33.1 F)	n/a	n/a
Jun	36.1 C (97.0 F)	3.3 C (37.9 F)	n/a	n/a
Jul	37.2 C (99.0 F)	8.3 C (46.9 F)	n/a	n/a
Aug	37.8 C (100.0 F)	6.7 C (44.1 F)	n/a	n/a
Sep	35.0 C (95.0 F)	-0.6 C (30.9 F)	n/a	n/a
Oct	30.6 C (87.1 F)	-4.4 C (24.1 F)	n/a	n/a
Nov	25.0 C (77.0 F)	-12.8 C (9.0 F)	n/a	n/a
Dec	19.4 C (66.9 F)	-24.4 C (-11.9 F)	n/a	n/a

Which Years Hold Standing Records

1,464 standing records

1,464 records at New London still stand. 1903 holds the most, with 50.

Standing records at New London by the year they were set
Year set	Standing records
1895	12
1896	48
1897	21
1898	37
1899	35
1900	27
1901	17
1902	24
1903	50
1904	26
1905	21
1906	22
1907	26
1908	21
1909	25
1910	16
1911	18
1912	19
1913	37
1914	43
1915	25
1916	25
1917	27
1918	29
1919	30
1920	39
1921	22
1922	19
1923	24
1924	10
1925	36
1926	26
1927	23
1928	14
1929	47
1930	35
1931	26
1932	26
1933	29
1934	41
1935	15
1936	17
1937	28
1938	31
1939	14
1940	5
1942	25
1943	21
1944	10
1945	24
1946	20
1947	23
1948	16
1949	28
1950	19
1951	13
1952	13
1953	13
1954	16
1955	15

All-Time Record Progression

5 new records

5 all-time records were set at New London between 16 September 1932 and 26 August 1948. Each dot is a new record.

When New London set new all-time records
Date	Kind	Detail
1932-09-16	Record daily precipitation	Record daily precipitation 105.7 mm (4.2 in)
1932-10-18	Record daily precipitation	Record daily precipitation 131.1 mm (5.2 in)
1933-12-30	Record low minimum temperature	Record low minimum temperature -24.4 C (-11.9 F)
1934-02-09	Record low minimum temperature	Record low minimum temperature -27.2 C (-17.0 F)
1948-08-26	Record high maximum temperature	Record high maximum temperature 37.8 C (100.0 F)

Wettest Day of Each Month

Oct: 131.1 mm (5.2 in)

The wettest day on record for each calendar month at New London. The most was 131.1 mm (5.2 in) on 18 October 1932.

Record daily precipitation for each month at New London
Month	Record daily precipitation (mm)	Date
Jan	72.4 mm (2.9 in)	18 January 1915
Feb	55.9 mm (2.2 in)	1 February 1915
Mar	79.8 mm (3.1 in)	28 March 1932
Apr	77.5 mm (3.1 in)	17 April 1919
May	62.7 mm (2.5 in)	6 May 1900
Jun	83.3 mm (3.3 in)	22 June 1918
Jul	82.0 mm (3.2 in)	20 July 1935
Aug	114.6 mm (4.5 in)	10 August 1954
Sep	105.7 mm (4.2 in)	16 September 1932
Oct	131.1 mm (5.2 in)	18 October 1932
Nov	106.7 mm (4.2 in)	12 November 1947
Dec	73.2 mm (2.9 in)	2 December 1942

Period of Record Coverage

1895 to 1955

60 years of record at New London, 1895 to 1955. 7 years have data for under 90 percent of days and are left out of rankings: 1895, 1901, 1928, 1940, 1944, 1952, 1955.

Days with data per year at New London
Year	Days with data	Share of year	Complete
1895	90	25%	No
1896	364	99%	Yes
1897	362	99%	Yes
1898	360	99%	Yes
1899	361	99%	Yes
1900	359	98%	Yes
1901	263	72%	No
1902	352	96%	Yes
1903	363	99%	Yes
1904	358	98%	Yes
1905	351	96%	Yes
1906	351	96%	Yes
1907	354	97%	Yes
1908	357	98%	Yes
1909	362	99%	Yes
1910	363	99%	Yes
1911	361	99%	Yes
1912	362	99%	Yes
1913	361	99%	Yes
1914	363	99%	Yes
1915	361	99%	Yes
1916	364	99%	Yes
1917	357	98%	Yes
1918	360	99%	Yes
1919	360	99%	Yes
1920	363	99%	Yes
1921	360	99%	Yes
1922	362	99%	Yes
1923	362	99%	Yes
1924	364	99%	Yes
1925	363	99%	Yes
1926	360	99%	Yes
1927	364	100%	Yes
1928	327	89%	No
1929	364	100%	Yes
1930	361	99%	Yes
1931	363	99%	Yes
1932	364	99%	Yes
1933	361	99%	Yes
1934	363	99%	Yes
1935	334	92%	Yes
1936	335	92%	Yes
1937	362	99%	Yes
1938	349	96%	Yes
1939	365	100%	Yes
1940	121	33%	No
1942	358	98%	Yes
1943	364	100%	Yes
1944	323	88%	No
1945	365	100%	Yes
1946	362	99%	Yes
1947	360	99%	Yes
1948	365	100%	Yes
1949	351	96%	Yes
1950	353	97%	Yes
1951	359	98%	Yes
1952	317	87%	No
1953	337	92%	Yes
1954	357	98%	Yes
1955	272	75%	No

Latest Records

Latest records at New London
Date	Station	Record	Value	Beat old record by	Old record stood	Significance
29 September 1955	New London, US	daily rain	38.1 mm (1.5 in)	0.3 mm (0.01 in)	53 years	22 of 100 (Routine)
23 August 1955	New London, US	daily high min (Tie)	22.8 C (73.0 F)	tie	48 years	5 of 100 (Routine)
21 August 1955	New London, US	daily high max	33.9 C (93.0 F)	0.6 C (1.1 F)	17 years	12 of 100 (Routine)
17 August 1955	New London, US	daily high min	22.8 C (73.0 F)	0.6 C (1.1 F)	10 years	10 of 100 (Routine)
15 August 1955	New London, US	daily high min	22.8 C (73.0 F)	0.6 C (1.1 F)	10 years	10 of 100 (Routine)
13 August 1955	New London, US	daily rain	50.8 mm (2.0 in)	17.0 mm (0.7 in)	2 years	16 of 100 (Routine)
8 August 1955	New London, US	daily rain	27.9 mm (1.1 in)	11.4 mm (0.4 in)	52 years	28 of 100 (Routine)
3 August 1955	New London, US	daily high max	34.4 C (93.9 F)	0.5 C (0.9 F)	28 years	15 of 100 (Routine)
2 August 1955	New London, US	daily high min	24.4 C (75.9 F)	0.5 C (0.9 F)	37 years	18 of 100 (Routine)
24 July 1955	New London, US	daily high max	35.6 C (96.1 F)	1.2 C (2.2 F)	25 years	16 of 100 (Routine)
23 July 1955	New London, US	daily high max	34.4 C (93.9 F)	1.6 C (2.9 F)	36 years	21 of 100 (Routine)
3 July 1955	New London, US	daily high min	23.3 C (73.9 F)	2.2 C (4.0 F)	46 years	27 of 100 (Routine)
13 June 1955	New London, US	daily low max (Tie)	17.2 C (63.0 F)	tie	22 years	3 of 100 (Routine)
27 April 1955	New London, US	daily low max	7.8 C (46.0 F)	0.5 C (0.9 F)	56 years	24 of 100 (Routine)
16 April 1955	New London, US	daily high min	11.1 C (52.0 F)	0.5 C (0.9 F)	58 years	24 of 100 (Routine)
12 April 1955	New London, US	daily high max	26.7 C (80.1 F)	4.5 C (8.1 F)	9 years	17 of 100 (Routine)
11 April 1955	New London, US	daily high max	23.3 C (73.9 F)	3.9 C (7.0 F)	32 years	23 of 100 (Routine)
22 March 1955	New London, US	daily rain	26.9 mm (1.1 in)	7.6 mm (0.30 in)	22 years	19 of 100 (Routine)
1 March 1955	New London, US	daily high max (Tie)	11.7 C (53.1 F)	tie	16 years	2 of 100 (Routine)
4 February 1955	New London, US	daily low min	-17.2 C (1.0 F)	1.1 C (2.0 F)	49 years	22 of 100 (Routine)

Climate Trend

50 complete years, 1896 to 1954

One stripe for each of 50 complete years at New London, 1896 to 1954. Blue stripes are years cooler than the station's own mean of 10.5 C (50.9 F); red stripes are warmer. The coolest year was 1904, at 8.5 C (47.4 F), and the warmest was 1949, at 12.3 C (54.1 F). The strongest colour marks a difference of 2.0 C (3.6 F).

Annual mean temperature at New London as warming stripes, 1896 to 1954
Year	Annual mean temperature	Difference from the station mean
1896	9.4 C	-1.05 C
1897	9.2 C	-1.28 C
1898	9.1 C	-1.37 C
1899	9.5 C	-1.00 C
1900	11.0 C	+0.49 C
1902	9.6 C	-0.88 C
1903	9.7 C	-0.78 C
1904	8.5 C	-1.95 C
1905	9.6 C	-0.88 C
1906	10.4 C	-0.14 C
1907	9.4 C	-1.05 C
1908	10.9 C	+0.36 C
1909	10.2 C	-0.32 C
1910	10.5 C	+0.04 C
1911	10.9 C	+0.41 C
1912	10.6 C	+0.13 C
1913	12.0 C	+1.46 C
1914	10.7 C	+0.18 C
1915	11.3 C	+0.83 C
1916	10.5 C	+0.04 C
1917	9.6 C	-0.94 C
1918	10.3 C	-0.16 C
1919	11.0 C	+0.52 C
1920	9.8 C	-0.66 C
1921	11.3 C	+0.85 C
1922	10.7 C	+0.25 C
1923	10.2 C	-0.32 C
1924	9.8 C	-0.70 C
1925	10.6 C	+0.12 C
1926	9.4 C	-1.11 C
1927	10.7 C	+0.17 C
1929	10.4 C	-0.06 C
1930	11.0 C	+0.55 C
1931	11.6 C	+1.10 C
1932	11.1 C	+0.63 C
1933	10.6 C	+0.07 C
1934	9.5 C	-1.00 C
1937	11.2 C	+0.67 C
1938	11.3 C	+0.81 C
1939	10.8 C	+0.27 C
1942	10.8 C	+0.28 C
1943	10.4 C	-0.07 C
1945	11.0 C	+0.55 C
1946	11.4 C	+0.93 C
1947	10.9 C	+0.37 C
1948	10.7 C	+0.25 C
1949	12.3 C	+1.77 C
1951	11.5 C	+1.02 C
1953	11.3 C	+0.81 C
1954	10.4 C	-0.08 C

The annual mean temperature here has risen by 0.3 C (0.2 to 0.4) per decade over 1896 to 1954. In Fahrenheit: 0.5 F (0.3 to 0.7) per decade. The slope is a straight line fitted to 50 complete years; the brackets give its 95 percent interval.

Fitted temperature trends per decade at New London
Measure	Per decade (C)	Per decade (F)	Period	Complete years	Reading
Annual mean temperature	0.3 C (0.2 to 0.4) per decade	0.5 F (0.3 to 0.7) per decade	1896 to 1954	50	Rise
Mean daily maximum	0.3 C (0.2 to 0.5) per decade	0.6 F (0.3 to 0.8) per decade	1896 to 1954	50	Rise
Mean daily minimum	0.2 C (0.1 to 0.3) per decade	0.4 F (0.2 to 0.5) per decade	1896 to 1954	50	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

1895 to 1955

Yearly extremes at New London: the record and the median year
Measure	Record	Year of the record	Median year	Years with a value
Hottest day (TXx)	37.8 C (100.0 F)	1948	33.9 C (93.0 F)	60
Coldest night (TNn)	-27.2 C (-17.0 F)	1934	-17.8 C (0.0 F)	60
Wettest day (Rx1day)	131.1 mm (5.2 in)	1932	61.2 mm (2.4 in)	60
Wettest five days (Rx5day)	180.4 mm (7.1 in)	1944	91.4 mm (3.6 in)	60
Longest dry spell (CDD)	44 days	1924	17 days	60

Hottest day (TXx)

The hottest day of the year at New London, 1895 to 1955. The record is 37.8 C (100.0 F) in 1948, marked on the chart; the median year is 33.9 C (93.0 F).

Hottest day (TXx) at New London by year
Year	Hottest day (TXx)
1895	21.1 C (70.0 F)
1896	33.9 C (93.0 F)
1897	31.7 C (89.1 F)
1898	33.3 C (91.9 F)
1899	31.7 C (89.1 F)
1900	35.0 C (95.0 F)
1901	33.3 C (91.9 F)
1902	32.2 C (90.0 F)
1903	34.4 C (93.9 F)
1904	33.3 C (91.9 F)
1905	32.8 C (91.0 F)
1906	32.2 C (90.0 F)
1907	32.2 C (90.0 F)
1908	33.3 C (91.9 F)
1909	33.3 C (91.9 F)
1910	34.4 C (93.9 F)
1911	35.0 C (95.0 F)
1912	34.4 C (93.9 F)
1913	35.0 C (95.0 F)
1914	33.9 C (93.0 F)
1915	32.8 C (91.0 F)
1916	34.4 C (93.9 F)
1917	37.2 C (99.0 F)
1918	33.9 C (93.0 F)
1919	35.6 C (96.1 F)
1920	31.1 C (88.0 F)
1921	33.3 C (91.9 F)
1922	32.2 C (90.0 F)
1923	34.4 C (93.9 F)
1924	33.9 C (93.0 F)
1925	36.1 C (97.0 F)
1926	36.7 C (98.1 F)
1927	32.8 C (91.0 F)
1928	32.8 C (91.0 F)
1929	35.0 C (95.0 F)
1930	34.4 C (93.9 F)
1931	35.0 C (95.0 F)
1932	33.3 C (91.9 F)
1933	34.4 C (93.9 F)
1934	36.1 C (97.0 F)
1935	32.8 C (91.0 F)
1936	33.9 C (93.0 F)
1937	36.7 C (98.1 F)
1938	35.0 C (95.0 F)
1939	33.9 C (93.0 F)
1940	18.9 C (66.0 F)
1942	31.7 C (89.1 F)
1943	33.3 C (91.9 F)
1944	34.4 C (93.9 F)
1945	35.0 C (95.0 F)
1946	32.2 C (90.0 F)
1947	32.2 C (90.0 F)
1948	37.8 C (100.0 F)
1949	35.0 C (95.0 F)
1950	31.1 C (88.0 F)
1951	31.1 C (88.0 F)
1952	35.0 C (95.0 F)
1953	33.9 C (93.0 F)
1954	32.2 C (90.0 F)
1955	35.6 C (96.1 F)

Coldest night (TNn)

The coldest night of the year at New London, 1895 to 1955. The record is -27.2 C (-17.0 F) in 1934, marked on the chart; the median year is -17.8 C (0.0 F).

Coldest night (TNn) at New London by year
Year	Coldest night (TNn)
1895	-11.7 C (10.9 F)
1896	-22.2 C (-8.0 F)
1897	-15.0 C (5.0 F)
1898	-16.7 C (1.9 F)
1899	-23.3 C (-9.9 F)
1900	-18.9 C (-2.0 F)
1901	-13.9 C (7.0 F)
1902	-21.1 C (-6.0 F)
1903	-16.7 C (1.9 F)
1904	-21.1 C (-6.0 F)
1905	-17.2 C (1.0 F)
1906	-16.7 C (1.9 F)
1907	-21.7 C (-7.1 F)
1908	-19.4 C (-2.9 F)
1909	-17.8 C (0.0 F)
1910	-20.0 C (-4.0 F)
1911	-12.8 C (9.0 F)
1912	-21.1 C (-6.0 F)
1913	-13.3 C (8.1 F)
1914	-21.7 C (-7.1 F)
1915	-11.7 C (10.9 F)
1916	-18.9 C (-2.0 F)
1917	-23.9 C (-11.0 F)
1918	-22.2 C (-8.0 F)
1919	-20.6 C (-5.1 F)
1920	-21.7 C (-7.1 F)
1921	-17.8 C (0.0 F)
1922	-20.0 C (-4.0 F)
1923	-15.0 C (5.0 F)
1924	-17.8 C (0.0 F)
1925	-19.4 C (-2.9 F)
1926	-16.1 C (3.0 F)
1927	-18.3 C (-0.9 F)
1928	-16.7 C (1.9 F)
1929	-15.0 C (5.0 F)
1930	-21.7 C (-7.1 F)
1931	-15.0 C (5.0 F)
1932	-16.1 C (3.0 F)
1933	-24.4 C (-11.9 F)
1934	-27.2 C (-17.0 F)
1935	-18.3 C (-0.9 F)
1936	-15.6 C (3.9 F)
1937	-12.2 C (10.0 F)
1938	-17.8 C (0.0 F)
1939	-15.0 C (5.0 F)
1940	-15.0 C (5.0 F)
1942	-22.2 C (-8.0 F)
1943	-23.3 C (-9.9 F)
1944	-13.3 C (8.1 F)
1945	-18.9 C (-2.0 F)
1946	-16.1 C (3.0 F)
1947	-13.9 C (7.0 F)
1948	-17.2 C (1.0 F)
1949	-12.2 C (10.0 F)
1950	-17.8 C (0.0 F)
1951	-14.4 C (6.1 F)
1952	-16.7 C (1.9 F)
1953	-12.2 C (10.0 F)
1954	-17.8 C (0.0 F)
1955	-17.8 C (0.0 F)

Wettest day (Rx1day)

The wettest day of the year at New London, 1895 to 1955. The record is 131.1 mm (5.2 in) in 1932, marked on the chart; the median year is 61.2 mm (2.4 in).

Wettest day (Rx1day) at New London by year
Year	Wettest day (Rx1day)
1895	44.7 mm (1.8 in)
1896	29.5 mm (1.2 in)
1897	66.0 mm (2.6 in)
1898	74.9 mm (2.9 in)
1899	58.4 mm (2.3 in)
1900	62.7 mm (2.5 in)
1901	41.7 mm (1.6 in)
1902	36.3 mm (1.4 in)
1903	28.2 mm (1.1 in)
1904	97.8 mm (3.9 in)
1905	53.8 mm (2.1 in)
1906	85.1 mm (3.4 in)
1907	59.7 mm (2.4 in)
1908	99.1 mm (3.9 in)
1909	55.6 mm (2.2 in)
1910	49.5 mm (1.9 in)
1911	59.7 mm (2.4 in)
1912	51.1 mm (2.0 in)
1913	55.9 mm (2.2 in)
1914	47.0 mm (1.9 in)
1915	72.4 mm (2.9 in)
1916	49.8 mm (2.0 in)
1917	76.2 mm (3.0 in)
1918	83.3 mm (3.3 in)
1919	77.5 mm (3.1 in)
1920	76.2 mm (3.0 in)
1921	50.8 mm (2.0 in)
1922	50.3 mm (2.0 in)
1923	88.9 mm (3.5 in)
1924	43.2 mm (1.7 in)
1925	63.5 mm (2.5 in)
1926	57.2 mm (2.3 in)
1927	86.4 mm (3.4 in)
1928	76.2 mm (3.0 in)
1929	68.1 mm (2.7 in)
1930	43.7 mm (1.7 in)
1931	90.4 mm (3.6 in)
1932	131.1 mm (5.2 in)
1933	45.2 mm (1.8 in)
1934	46.2 mm (1.8 in)
1935	82.0 mm (3.2 in)
1936	76.5 mm (3.0 in)
1937	51.1 mm (2.0 in)
1938	83.6 mm (3.3 in)
1939	76.7 mm (3.0 in)
1940	64.0 mm (2.5 in)
1942	73.2 mm (2.9 in)
1943	48.3 mm (1.9 in)
1944	85.9 mm (3.4 in)
1945	49.3 mm (1.9 in)
1946	99.3 mm (3.9 in)
1947	106.7 mm (4.2 in)
1948	49.5 mm (1.9 in)
1949	51.3 mm (2.0 in)
1950	31.5 mm (1.2 in)
1951	79.2 mm (3.1 in)
1952	51.6 mm (2.0 in)
1953	65.3 mm (2.6 in)
1954	114.6 mm (4.5 in)
1955	50.8 mm (2.0 in)

Wettest five days (Rx5day)

The wettest five days of the year at New London, 1895 to 1955. The record is 180.4 mm (7.1 in) in 1944, marked on the chart; the median year is 91.4 mm (3.6 in).

Wettest five days (Rx5day) at New London by year
Year	Wettest five days (Rx5day)
1895	111.4 mm (4.4 in)
1896	45.4 mm (1.8 in)
1897	75.5 mm (3.0 in)
1898	87.8 mm (3.5 in)
1899	90.4 mm (3.6 in)
1900	88.3 mm (3.5 in)
1901	90.3 mm (3.6 in)
1902	76.8 mm (3.0 in)
1903	82.3 mm (3.2 in)
1904	110.6 mm (4.4 in)
1905	76.9 mm (3.0 in)
1906	87.9 mm (3.5 in)
1907	81.0 mm (3.2 in)
1908	148.9 mm (5.9 in)
1909	85.1 mm (3.4 in)
1910	76.9 mm (3.0 in)
1911	139.8 mm (5.5 in)
1912	92.8 mm (3.7 in)
1913	124.4 mm (4.9 in)
1914	88.4 mm (3.5 in)
1915	100.9 mm (4.0 in)
1916	91.7 mm (3.6 in)
1917	86.4 mm (3.4 in)
1918	95.0 mm (3.7 in)
1919	100.1 mm (3.9 in)
1920	104.1 mm (4.1 in)
1921	90.2 mm (3.6 in)
1922	88.6 mm (3.5 in)
1923	70.1 mm (2.8 in)
1924	80.5 mm (3.2 in)
1925	67.3 mm (2.6 in)
1926	83.9 mm (3.3 in)
1927	120.7 mm (4.8 in)
1928	76.2 mm (3.0 in)
1929	70.6 mm (2.8 in)
1930	89.4 mm (3.5 in)
1931	97.8 mm (3.9 in)
1932	138.7 mm (5.5 in)
1933	142.2 mm (5.6 in)
1934	93.0 mm (3.7 in)
1935	105.9 mm (4.2 in)
1936	108.2 mm (4.3 in)
1937	92.5 mm (3.6 in)
1938	142.7 mm (5.6 in)
1939	98.0 mm (3.9 in)
1940	115.3 mm (4.5 in)
1942	91.0 mm (3.6 in)
1943	72.1 mm (2.8 in)
1944	180.4 mm (7.1 in)
1945	63.8 mm (2.5 in)
1946	103.9 mm (4.1 in)
1947	119.6 mm (4.7 in)
1948	87.1 mm (3.4 in)
1949	62.0 mm (2.4 in)
1950	58.2 mm (2.3 in)
1951	128.5 mm (5.1 in)
1952	108.1 mm (4.3 in)
1953	122.8 mm (4.8 in)
1954	144.4 mm (5.7 in)
1955	102.1 mm (4.0 in)

Longest dry spell (CDD)

The longest dry spell of the year at New London, 1895 to 1955. The record is 44 days in 1924, marked on the chart; the median year is 17 days.

Longest dry spell (CDD) at New London by year
Year	Longest dry spell (CDD)
1895	15 days
1896	23 days
1897	14 days
1898	9 days
1899	20 days
1900	17 days
1901	23 days
1902	16 days
1903	35 days
1904	22 days
1905	20 days
1906	11 days
1907	11 days
1908	22 days
1909	13 days
1910	20 days
1911	17 days
1912	27 days
1913	17 days
1914	22 days
1915	15 days
1916	13 days
1917	22 days
1918	15 days
1919	15 days
1920	15 days
1921	18 days
1922	15 days
1923	16 days
1924	44 days
1925	16 days
1926	16 days
1927	14 days
1928	13 days
1929	19 days
1930	30 days
1931	12 days
1932	22 days
1933	11 days
1934	17 days
1935	22 days
1936	15 days
1937	14 days
1938	12 days
1939	17 days
1940	9 days
1942	15 days
1943	19 days
1944	16 days
1945	17 days
1946	17 days
1947	33 days
1948	19 days
1949	40 days
1950	15 days
1951	14 days
1952	17 days
1953	29 days
1954	18 days
1955	25 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

50 years with a frost

Across 50 years with a frost, the median last spring frost at New London falls on 14 April and the median first autumn frost on 28 October, which leaves a median of 198 days between them.

Fitted over all years, the growing season changes by +1.1 days per decade at this station.

Frost dates and growing season at New London
Measure	Median, all years	Earliest period	Recent period (1917 to 1954)	Recent against earliest	Fitted trend
Last spring frost	14 April	n/a	14 April	n/a	-0.9 days per decade
First autumn frost	28 October	n/a	28 October	n/a	+0.2 days per decade
Growing days	198 days	n/a	198 days	n/a	+1.1 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

47 years, 1896 to 1954

A day with at least 62.0 mm (2.4 in) of rain is expected about once in 2 years. A day with at least 134.2 mm (5.3 in) of rain is expected about once in 100 years.

Rainfall return levels at New London: the daily rain expected about once in a given number of years
Expected about once in	A day with at least	Note
2 years	62.0 mm (2.4 in)
5 years	82.6 mm (3.3 in)
10 years	95.7 mm (3.8 in)
25 years	111.7 mm (4.4 in)
50 years	123.1 mm (4.8 in)	Longer than the 47 years of record
100 years	134.2 mm (5.3 in)	Longer than the 47 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, 47 years of values from 1896 to 1954.

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: 131.1 mm (5.2 in) in 1932; 114.6 mm (4.5 in) in 1954; 106.7 mm (4.2 in) in 1947.

Station Changes

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

Download the Data

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