Bethlehem Weather Records (USC00270703)

Record envelope, standing records and threshold days for Bethlehem (USC00270703), New Hampshire, United States, with 99 years of record.

Key Facts for Bethlehem

Bethlehem (USC00270703) is a weather station in New Hampshire, United States at 44.28 latitude and -71.68 longitude, 421 m (1,380 ft) above sea level.
The station reports from 1893 to 1991, 99 years of record.
1,464 records set at Bethlehem still stand.
Records are tracked for tmax, tmin, prcp, snow, snwd: an element needs 30 years of data to be eligible.
Bethlehem set a daily record precipitation of 27.9 mm (1.1 in) on 12 November 1991.

About the Station

Location: New Hampshire, United States, 44.28 latitude, -71.68 longitude.
Elevation: 421 m (1,380 ft).
Period of record: 1893 to 1991, 99 years.
Eligible elements: tmax, tmin, prcp, snow, 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 Bethlehem. 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 Bethlehem, with 2026 drawn through them
Month	Highest record high	Lowest record low	2026 highest maximum	2026 lowest minimum
Jan	18.3 C (64.9 F)	-37.2 C (-35.0 F)	n/a	n/a
Feb	16.1 C (61.0 F)	-36.7 C (-34.1 F)	n/a	n/a
Mar	26.7 C (80.1 F)	-30.0 C (-22.0 F)	n/a	n/a
Apr	31.7 C (89.1 F)	-20.0 C (-4.0 F)	n/a	n/a
May	32.8 C (91.0 F)	-6.7 C (19.9 F)	n/a	n/a
Jun	34.4 C (93.9 F)	-2.2 C (28.0 F)	n/a	n/a
Jul	35.6 C (96.1 F)	2.2 C (36.0 F)	n/a	n/a
Aug	35.0 C (95.0 F)	0.6 C (33.1 F)	n/a	n/a
Sep	32.2 C (90.0 F)	-5.6 C (21.9 F)	n/a	n/a
Oct	29.4 C (84.9 F)	-13.3 C (8.1 F)	n/a	n/a
Nov	23.9 C (75.0 F)	-22.8 C (-9.0 F)	n/a	n/a
Dec	16.7 C (62.1 F)	-36.7 C (-34.1 F)	n/a	n/a

Which Years Hold Standing Records

1,464 standing records

1,464 records at Bethlehem still stand. 1917 holds the most, with 29.

Standing records at Bethlehem by the year they were set
Year set	Standing records
1893	11
1894	17
1895	19
1896	18
1897	14
1898	10
1899	15
1900	14
1901	18
1902	11
1903	19
1904	9
1905	9
1906	18
1907	20
1908	19
1909	8
1910	17
1911	26
1912	18
1913	20
1914	27
1915	12
1916	20
1917	29
1918	23
1919	18
1920	13
1921	16
1922	6
1923	17
1924	14
1925	18
1926	19
1927	7
1928	11
1929	27
1930	23
1931	17
1932	15
1933	17
1934	26
1935	10
1936	17
1937	16
1938	18
1939	12
1940	11
1941	18
1942	20
1943	16
1944	17
1945	28
1946	18
1947	17
1948	15
1949	17
1950	16
1951	12
1952	9
1953	21
1954	13
1955	12
1956	19
1957	15
1958	8
1959	11
1960	6
1961	12
1962	13
1963	13
1964	17
1965	16
1966	13
1967	10
1968	18
1969	8
1970	10
1971	9
1972	12
1973	5
1974	11
1975	7
1976	17
1977	13
1978	6
1979	27
1980	8
1981	20
1982	14
1983	3
1984	7
1985	6
1986	12
1987	13
1988	11
1989	8
1990	14
1991	14

All-Time Record Progression

2 new records

2 all-time records were set at Bethlehem between 25 August 1947 and 22 May 1983. Each dot is a new record.

When Bethlehem set new all-time records
Date	Kind	Detail
1947-08-25	Record high minimum temperature	Record high minimum temperature 25.0 C (77.0 F)
1983-05-22	Record daily precipitation	Record daily precipitation 113.0 mm (4.4 in)

Wettest Day of Each Month

May: 113.0 mm (4.4 in)

The wettest day on record for each calendar month at Bethlehem. The most was 113.0 mm (4.4 in) on 22 May 1983.

Record daily precipitation for each month at Bethlehem
Month	Record daily precipitation (mm)	Date
Jan	61.2 mm (2.4 in)	27 January 1986
Feb	56.6 mm (2.2 in)	10 February 1969
Mar	71.1 mm (2.8 in)	6 March 1920
Apr	43.2 mm (1.7 in)	20 April 1904
May	113.0 mm (4.4 in)	22 May 1983
Jun	76.7 mm (3.0 in)	3 June 1947
Jul	62.7 mm (2.5 in)	8 July 1941
Aug	95.8 mm (3.8 in)	15 August 1927
Sep	102.9 mm (4.1 in)	21 September 1938
Oct	75.9 mm (3.0 in)	28 October 1902
Nov	91.4 mm (3.6 in)	23 November 1924
Dec	76.5 mm (3.0 in)	12 December 1952

Period of Record Coverage

1893 to 1991

99 years of record at Bethlehem, 1893 to 1991. 8 years have data for under 90 percent of days and are left out of rankings: 1905, 1907, 1919, 1922, 1959, 1965, 1990, 1991.

Days with data per year at Bethlehem
Year	Days with data	Share of year	Complete
1893	345	95%	Yes
1894	365	100%	Yes
1895	360	99%	Yes
1896	365	100%	Yes
1897	363	99%	Yes
1898	364	100%	Yes
1899	364	100%	Yes
1900	365	100%	Yes
1901	364	100%	Yes
1902	365	100%	Yes
1903	334	92%	Yes
1904	365	100%	Yes
1905	324	89%	No
1906	365	100%	Yes
1907	313	86%	No
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	366	100%	Yes
1917	363	99%	Yes
1918	334	92%	Yes
1919	266	73%	No
1920	349	95%	Yes
1921	364	100%	Yes
1922	205	56%	No
1923	344	94%	Yes
1924	346	95%	Yes
1925	349	96%	Yes
1926	348	95%	Yes
1927	356	98%	Yes
1928	364	99%	Yes
1929	363	99%	Yes
1930	364	100%	Yes
1931	362	99%	Yes
1932	363	99%	Yes
1933	359	98%	Yes
1934	363	99%	Yes
1935	365	100%	Yes
1936	364	99%	Yes
1937	332	91%	Yes
1938	364	100%	Yes
1939	359	98%	Yes
1940	359	98%	Yes
1941	364	100%	Yes
1942	365	100%	Yes
1943	364	100%	Yes
1944	366	100%	Yes
1945	365	100%	Yes
1946	364	100%	Yes
1947	365	100%	Yes
1948	365	100%	Yes
1949	364	100%	Yes
1950	365	100%	Yes
1951	362	99%	Yes
1952	366	100%	Yes
1953	365	100%	Yes
1954	362	99%	Yes
1955	334	92%	Yes
1956	366	100%	Yes
1957	362	99%	Yes
1958	365	100%	Yes
1959	325	89%	No
1960	348	95%	Yes
1961	361	99%	Yes
1962	361	99%	Yes
1963	361	99%	Yes
1964	355	97%	Yes
1965	319	87%	No
1966	361	99%	Yes
1967	361	99%	Yes
1968	362	99%	Yes
1969	365	100%	Yes
1970	363	99%	Yes
1971	362	99%	Yes
1972	363	99%	Yes
1973	355	97%	Yes
1974	346	95%	Yes
1975	348	95%	Yes
1976	349	95%	Yes
1977	344	94%	Yes
1978	343	94%	Yes
1979	361	99%	Yes
1980	342	93%	Yes
1981	331	91%	Yes
1982	344	94%	Yes
1983	337	92%	Yes
1984	331	90%	Yes
1985	358	98%	Yes
1986	361	99%	Yes
1987	331	91%	Yes
1988	357	98%	Yes
1989	347	95%	Yes
1990	322	88%	No
1991	328	90%	No

Latest Records

Latest records at Bethlehem
Date	Station	Record	Value	Beat old record by	Old record stood	Significance
12 November 1991	Bethlehem, US	daily rain	27.9 mm (1.1 in)	6.6 mm (0.26 in)	50 years	31 of 100 (Routine)
12 October 1991	Bethlehem, US	daily rain	23.9 mm (0.9 in)	0.8 mm (0.03 in)	77 years	20 of 100 (Routine)
17 September 1991	Bethlehem, US	daily high min	20.0 C (68.0 F)	0.6 C (1.1 F)	49 years	24 of 100 (Routine)
2 September 1991	Bethlehem, US	daily low min (Tie)	1.1 C (34.0 F)	tie	24 years	4 of 100 (Routine)
20 August 1991	Bethlehem, US	daily rain	58.9 mm (2.3 in)	23.6 mm (0.9 in)	50 years	45 of 100 (Notable)
20 July 1991	Bethlehem, US	daily high min (Tie)	20.0 C (68.0 F)	tie	96 years	9 of 100 (Routine)
17 May 1991	Bethlehem, US	daily high min	16.1 C (61.0 F)	3.9 C (7.0 F)	25 years	24 of 100 (Routine)
7 May 1991	Bethlehem, US	daily rain (Tie)	20.8 mm (0.8 in)	tie	5 years	2 of 100 (Routine)
9 April 1991	Bethlehem, US	daily high min	12.8 C (55.0 F)	3.9 C (7.0 F)	69 years	37 of 100 (Notable)
8 April 1991	Bethlehem, US	daily high max	25.6 C (78.1 F)	3.9 C (7.0 F)	61 years	33 of 100 (Routine)
7 April 1991	Bethlehem, US	daily high min	8.9 C (48.0 F)	1.7 C (3.1 F)	72 years	33 of 100 (Routine)
7 April 1991	Bethlehem, US	daily high max	24.4 C (75.9 F)	2.7 C (4.9 F)	62 years	31 of 100 (Routine)
4 March 1991	Bethlehem, US	daily high min	0.6 C (33.1 F)	1.2 C (2.2 F)	68 years	30 of 100 (Routine)
3 March 1991	Bethlehem, US	daily high min	2.2 C (36.0 F)	0.5 C (0.9 F)	45 years	22 of 100 (Routine)
2 March 1991	Bethlehem, US	daily high max	11.1 C (52.0 F)	1.7 C (3.1 F)	96 years	40 of 100 (Notable)
2 March 1991	Bethlehem, US	daily high min	4.4 C (39.9 F)	1.6 C (2.9 F)	88 years	37 of 100 (Notable)
8 February 1991	Bethlehem, US	daily high min (Tie)	-0.6 C (30.9 F)	tie	93 years	9 of 100 (Routine)
7 February 1991	Bethlehem, US	daily high max (Tie)	8.9 C (48.0 F)	tie	40 years	5 of 100 (Routine)
6 February 1991	Bethlehem, US	daily high min	1.1 C (34.0 F)	2.2 C (4.0 F)	52 years	26 of 100 (Routine)
5 February 1991	Bethlehem, US	daily high max	11.1 C (52.0 F)	1.1 C (2.0 F)	81 years	34 of 100 (Routine)

Climate Trend

74 complete years, 1894 to 1988

One stripe for each of 74 complete years at Bethlehem, 1894 to 1988. Blue stripes are years cooler than the station's own mean of 5.5 C (41.9 F); red stripes are warmer. The coolest year was 1917, at 3.4 C (38.0 F), and the warmest was 1953, at 7.3 C (45.2 F). The strongest colour marks a difference of 2.2 C (4.0 F).

Annual mean temperature at Bethlehem as warming stripes, 1894 to 1988
Year	Annual mean temperature	Difference from the station mean
1894	6.1 C	+0.54 C
1895	5.6 C	+0.11 C
1896	5.4 C	-0.14 C
1897	5.7 C	+0.15 C
1898	6.6 C	+1.04 C
1899	5.8 C	+0.24 C
1900	5.9 C	+0.33 C
1901	5.9 C	+0.34 C
1902	5.6 C	+0.09 C
1904	4.0 C	-1.49 C
1906	5.2 C	-0.31 C
1908	5.5 C	-0.04 C
1909	5.0 C	-0.54 C
1910	5.5 C	-0.08 C
1911	5.5 C	-0.08 C
1912	4.6 C	-0.89 C
1913	6.3 C	+0.81 C
1914	4.5 C	-1.00 C
1915	5.9 C	+0.38 C
1916	5.0 C	-0.50 C
1917	3.4 C	-2.18 C
1920	4.9 C	-0.62 C
1921	6.1 C	+0.61 C
1923	4.9 C	-0.65 C
1924	4.7 C	-0.88 C
1925	5.2 C	-0.31 C
1926	3.5 C	-2.03 C
1927	5.7 C	+0.14 C
1928	5.6 C	+0.02 C
1929	5.2 C	-0.32 C
1930	5.6 C	+0.10 C
1931	6.6 C	+1.08 C
1932	6.3 C	+0.76 C
1933	5.7 C	+0.16 C
1934	5.0 C	-0.50 C
1935	5.1 C	-0.44 C
1936	5.5 C	-0.04 C
1938	6.8 C	+1.25 C
1939	5.4 C	-0.16 C
1940	4.9 C	-0.64 C
1941	6.1 C	+0.58 C
1942	6.4 C	+0.86 C
1943	5.0 C	-0.56 C
1944	5.8 C	+0.28 C
1945	6.2 C	+0.65 C
1946	6.3 C	+0.79 C
1947	6.1 C	+0.57 C
1948	5.9 C	+0.35 C
1949	7.3 C	+1.77 C
1950	5.9 C	+0.36 C
1951	6.3 C	+0.78 C
1952	6.4 C	+0.91 C
1953	7.3 C	+1.79 C
1954	5.6 C	+0.09 C
1956	5.1 C	-0.39 C
1957	6.0 C	+0.42 C
1958	5.0 C	-0.50 C
1960	5.2 C	-0.33 C
1961	5.2 C	-0.31 C
1962	4.0 C	-1.55 C
1963	4.7 C	-0.88 C
1964	4.9 C	-0.60 C
1966	5.5 C	-0.04 C
1967	5.2 C	-0.38 C
1968	5.0 C	-0.53 C
1969	5.6 C	+0.11 C
1970	5.5 C	-0.05 C
1971	5.5 C	-0.08 C
1972	4.9 C	-0.60 C
1973	6.5 C	+0.96 C
1979	6.3 C	+0.73 C
1985	5.4 C	-0.15 C
1986	5.8 C	+0.22 C
1988	5.7 C	+0.13 C

The fitted trend in annual mean temperature here over 1894 to 1988 is 0.02 C (-0.04 to 0.09) per decade. The interval includes zero, so the trend is not clearly different from zero. In Fahrenheit: 0.04 F (-0.08 to 0.17) per decade. The slope is a straight line fitted to 74 complete years; the brackets give its 95 percent interval.

Fitted temperature trends per decade at Bethlehem
Measure	Per decade (C)	Per decade (F)	Period	Complete years	Reading
Annual mean temperature	0.02 C (-0.04 to 0.09) per decade	0.04 F (-0.08 to 0.17) per decade	1894 to 1988	74	Not clearly different from zero
Mean daily maximum	0.08 C (0.01 to 0.15) per decade	0.15 F (0.02 to 0.28) per decade	1894 to 1988	74	Rise
Mean daily minimum	-0.04 C (-0.11 to 0.04) per decade	-0.1 F (-0.2 to 0.1) per decade	1894 to 1988	74	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

1893 to 1991

Yearly extremes at Bethlehem: the record and the median year
Measure	Record	Year of the record	Median year	Years with a value
Hottest day (TXx)	35.6 C (96.1 F)	1911	32.2 C (90.0 F)	99
Coldest night (TNn)	-37.2 C (-35.0 F)	1920	-29.4 C (-20.9 F)	99
Wettest day (Rx1day)	113.0 mm (4.4 in)	1983	49.0 mm (1.9 in)	99
Wettest five days (Rx5day)	144.5 mm (5.7 in)	1938	68.8 mm (2.7 in)	99
Longest dry spell (CDD)	28 days	1925	13 days	99

Hottest day (TXx)

The hottest day of the year at Bethlehem, 1893 to 1991. The record is 35.6 C (96.1 F) in 1911, marked on the chart; the median year is 32.2 C (90.0 F).

Hottest day (TXx) at Bethlehem by year
Year	Hottest day (TXx)
1893	31.7 C (89.1 F)
1894	32.8 C (91.0 F)
1895	33.3 C (91.9 F)
1896	31.7 C (89.1 F)
1897	33.3 C (91.9 F)
1898	32.2 C (90.0 F)
1899	31.7 C (89.1 F)
1900	31.7 C (89.1 F)
1901	33.3 C (91.9 F)
1902	28.9 C (84.0 F)
1903	30.6 C (87.1 F)
1904	31.1 C (88.0 F)
1905	30.0 C (86.0 F)
1906	32.2 C (90.0 F)
1907	32.2 C (90.0 F)
1908	33.9 C (93.0 F)
1909	31.1 C (88.0 F)
1910	33.3 C (91.9 F)
1911	35.6 C (96.1 F)
1912	33.3 C (91.9 F)
1913	33.9 C (93.0 F)
1914	31.7 C (89.1 F)
1915	30.6 C (87.1 F)
1916	32.2 C (90.0 F)
1917	33.3 C (91.9 F)
1918	32.8 C (91.0 F)
1919	34.4 C (93.9 F)
1920	30.0 C (86.0 F)
1921	34.4 C (93.9 F)
1922	30.6 C (87.1 F)
1923	32.2 C (90.0 F)
1924	31.1 C (88.0 F)
1925	30.6 C (87.1 F)
1926	34.4 C (93.9 F)
1927	31.7 C (89.1 F)
1928	31.7 C (89.1 F)
1929	32.2 C (90.0 F)
1930	31.1 C (88.0 F)
1931	33.9 C (93.0 F)
1932	31.7 C (89.1 F)
1933	33.3 C (91.9 F)
1934	31.7 C (89.1 F)
1935	33.9 C (93.0 F)
1936	31.1 C (88.0 F)
1937	32.8 C (91.0 F)
1938	33.3 C (91.9 F)
1939	32.2 C (90.0 F)
1940	32.2 C (90.0 F)
1941	33.3 C (91.9 F)
1942	32.8 C (91.0 F)
1943	31.7 C (89.1 F)
1944	35.0 C (95.0 F)
1945	31.7 C (89.1 F)
1946	32.8 C (91.0 F)
1947	34.4 C (93.9 F)
1948	32.8 C (91.0 F)
1949	33.9 C (93.0 F)
1950	31.1 C (88.0 F)
1951	31.1 C (88.0 F)
1952	33.9 C (93.0 F)
1953	33.9 C (93.0 F)
1954	32.2 C (90.0 F)
1955	33.3 C (91.9 F)
1956	32.2 C (90.0 F)
1957	32.2 C (90.0 F)
1958	31.1 C (88.0 F)
1959	33.9 C (93.0 F)
1960	30.0 C (86.0 F)
1961	30.6 C (87.1 F)
1962	31.1 C (88.0 F)
1963	32.2 C (90.0 F)
1964	31.7 C (89.1 F)
1965	31.1 C (88.0 F)
1966	32.2 C (90.0 F)
1967	30.0 C (86.0 F)
1968	31.1 C (88.0 F)
1969	32.2 C (90.0 F)
1970	32.2 C (90.0 F)
1971	32.2 C (90.0 F)
1972	31.1 C (88.0 F)
1973	33.3 C (91.9 F)
1974	31.7 C (89.1 F)
1975	34.4 C (93.9 F)
1976	31.1 C (88.0 F)
1977	34.4 C (93.9 F)
1978	31.7 C (89.1 F)
1979	32.2 C (90.0 F)
1980	30.6 C (87.1 F)
1981	32.2 C (90.0 F)
1982	32.2 C (90.0 F)
1983	32.8 C (91.0 F)
1984	32.2 C (90.0 F)
1985	31.7 C (89.1 F)
1986	31.1 C (88.0 F)
1987	32.8 C (91.0 F)
1988	33.9 C (93.0 F)
1989	32.2 C (90.0 F)
1990	31.7 C (89.1 F)
1991	33.9 C (93.0 F)

Coldest night (TNn)

The coldest night of the year at Bethlehem, 1893 to 1991. The record is -37.2 C (-35.0 F) in 1920, marked on the chart; the median year is -29.4 C (-20.9 F).

Coldest night (TNn) at Bethlehem by year
Year	Coldest night (TNn)
1893	-28.9 C (-20.0 F)
1894	-31.1 C (-24.0 F)
1895	-30.0 C (-22.0 F)
1896	-32.2 C (-26.0 F)
1897	-28.9 C (-20.0 F)
1898	-28.3 C (-18.9 F)
1899	-27.2 C (-17.0 F)
1900	-28.3 C (-18.9 F)
1901	-30.0 C (-22.0 F)
1902	-29.4 C (-20.9 F)
1903	-29.4 C (-20.9 F)
1904	-29.4 C (-20.9 F)
1905	-26.1 C (-15.0 F)
1906	-28.3 C (-18.9 F)
1907	-32.2 C (-26.0 F)
1908	-31.1 C (-24.0 F)
1909	-29.4 C (-20.9 F)
1910	-30.0 C (-22.0 F)
1911	-26.1 C (-15.0 F)
1912	-31.1 C (-24.0 F)
1913	-28.3 C (-18.9 F)
1914	-36.7 C (-34.1 F)
1915	-31.7 C (-25.1 F)
1916	-28.3 C (-18.9 F)
1917	-36.1 C (-33.0 F)
1918	-33.3 C (-27.9 F)
1919	-30.6 C (-23.1 F)
1920	-37.2 C (-35.0 F)
1921	-28.9 C (-20.0 F)
1922	-33.9 C (-29.0 F)
1923	-28.9 C (-20.0 F)
1924	-32.2 C (-26.0 F)
1925	-31.7 C (-25.1 F)
1926	-27.8 C (-18.0 F)
1927	-31.1 C (-24.0 F)
1928	-27.8 C (-18.0 F)
1929	-26.1 C (-15.0 F)
1930	-31.7 C (-25.1 F)
1931	-28.9 C (-20.0 F)
1932	-27.2 C (-17.0 F)
1933	-36.7 C (-34.1 F)
1934	-36.7 C (-34.1 F)
1935	-32.8 C (-27.0 F)
1936	-27.2 C (-17.0 F)
1937	-20.6 C (-5.1 F)
1938	-30.0 C (-22.0 F)
1939	-29.4 C (-20.9 F)
1940	-28.9 C (-20.0 F)
1941	-27.2 C (-17.0 F)
1942	-35.0 C (-31.0 F)
1943	-35.6 C (-32.1 F)
1944	-27.8 C (-18.0 F)
1945	-28.9 C (-20.0 F)
1946	-30.0 C (-22.0 F)
1947	-26.1 C (-15.0 F)
1948	-30.0 C (-22.0 F)
1949	-23.3 C (-9.9 F)
1950	-29.4 C (-20.9 F)
1951	-30.6 C (-23.1 F)
1952	-27.2 C (-17.0 F)
1953	-25.0 C (-13.0 F)
1954	-28.9 C (-20.0 F)
1955	-31.7 C (-25.1 F)
1956	-27.2 C (-17.0 F)
1957	-36.7 C (-34.1 F)
1958	-28.3 C (-18.9 F)
1959	-28.9 C (-20.0 F)
1960	-26.7 C (-16.1 F)
1961	-30.0 C (-22.0 F)
1962	-30.6 C (-23.1 F)
1963	-30.6 C (-23.1 F)
1964	-26.1 C (-15.0 F)
1965	-33.9 C (-29.0 F)
1966	-27.2 C (-17.0 F)
1967	-31.1 C (-24.0 F)
1968	-35.6 C (-32.1 F)
1969	-27.2 C (-17.0 F)
1970	-28.3 C (-18.9 F)
1971	-30.0 C (-22.0 F)
1972	-32.2 C (-26.0 F)
1973	-30.6 C (-23.1 F)
1974	-32.2 C (-26.0 F)
1975	-28.3 C (-18.9 F)
1976	-31.7 C (-25.1 F)
1977	-29.4 C (-20.9 F)
1978	-30.0 C (-22.0 F)
1979	-32.2 C (-26.0 F)
1980	-32.8 C (-27.0 F)
1981	-35.6 C (-32.1 F)
1982	-30.6 C (-23.1 F)
1983	-27.8 C (-18.0 F)
1984	-30.0 C (-22.0 F)
1985	-29.4 C (-20.9 F)
1986	-28.9 C (-20.0 F)
1987	-30.6 C (-23.1 F)
1988	-30.0 C (-22.0 F)
1989	-28.3 C (-18.9 F)
1990	-26.7 C (-16.1 F)
1991	-26.1 C (-15.0 F)

Wettest day (Rx1day)

The wettest day of the year at Bethlehem, 1893 to 1991. The record is 113.0 mm (4.4 in) in 1983, marked on the chart; the median year is 49.0 mm (1.9 in).

Wettest day (Rx1day) at Bethlehem by year
Year	Wettest day (Rx1day)
1893	44.7 mm (1.8 in)
1894	26.4 mm (1.0 in)
1895	38.6 mm (1.5 in)
1896	35.8 mm (1.4 in)
1897	46.2 mm (1.8 in)
1898	45.7 mm (1.8 in)
1899	37.3 mm (1.5 in)
1900	50.3 mm (2.0 in)
1901	47.2 mm (1.9 in)
1902	75.9 mm (3.0 in)
1903	38.6 mm (1.5 in)
1904	45.2 mm (1.8 in)
1905	46.7 mm (1.8 in)
1906	70.4 mm (2.8 in)
1907	34.3 mm (1.4 in)
1908	27.2 mm (1.1 in)
1909	76.2 mm (3.0 in)
1910	76.7 mm (3.0 in)
1911	49.0 mm (1.9 in)
1912	34.8 mm (1.4 in)
1913	37.6 mm (1.5 in)
1914	38.4 mm (1.5 in)
1915	43.7 mm (1.7 in)
1916	55.4 mm (2.2 in)
1917	56.1 mm (2.2 in)
1918	53.6 mm (2.1 in)
1919	49.8 mm (2.0 in)
1920	71.1 mm (2.8 in)
1921	54.6 mm (2.1 in)
1922	38.4 mm (1.5 in)
1923	43.4 mm (1.7 in)
1924	91.4 mm (3.6 in)
1925	56.4 mm (2.2 in)
1926	40.4 mm (1.6 in)
1927	95.8 mm (3.8 in)
1928	34.5 mm (1.4 in)
1929	24.1 mm (0.9 in)
1930	39.9 mm (1.6 in)
1931	41.7 mm (1.6 in)
1932	38.9 mm (1.5 in)
1933	39.9 mm (1.6 in)
1934	50.8 mm (2.0 in)
1935	37.1 mm (1.5 in)
1936	50.3 mm (2.0 in)
1937	49.8 mm (2.0 in)
1938	102.9 mm (4.1 in)
1939	42.2 mm (1.7 in)
1940	42.2 mm (1.7 in)
1941	62.7 mm (2.5 in)
1942	73.2 mm (2.9 in)
1943	35.3 mm (1.4 in)
1944	39.4 mm (1.6 in)
1945	48.0 mm (1.9 in)
1946	61.2 mm (2.4 in)
1947	76.7 mm (3.0 in)
1948	54.9 mm (2.2 in)
1949	30.5 mm (1.2 in)
1950	82.8 mm (3.3 in)
1951	40.9 mm (1.6 in)
1952	76.5 mm (3.0 in)
1953	53.1 mm (2.1 in)
1954	85.9 mm (3.4 in)
1955	50.5 mm (2.0 in)
1956	50.5 mm (2.0 in)
1957	79.2 mm (3.1 in)
1958	54.9 mm (2.2 in)
1959	63.5 mm (2.5 in)
1960	54.4 mm (2.1 in)
1961	37.8 mm (1.5 in)
1962	76.5 mm (3.0 in)
1963	31.8 mm (1.3 in)
1964	56.6 mm (2.2 in)
1965	47.2 mm (1.9 in)
1966	31.5 mm (1.2 in)
1967	55.1 mm (2.2 in)
1968	33.8 mm (1.3 in)
1969	63.0 mm (2.5 in)
1970	55.1 mm (2.2 in)
1971	36.6 mm (1.4 in)
1972	34.0 mm (1.3 in)
1973	41.1 mm (1.6 in)
1974	35.8 mm (1.4 in)
1975	34.8 mm (1.4 in)
1976	38.6 mm (1.5 in)
1977	45.0 mm (1.8 in)
1978	74.9 mm (2.9 in)
1979	34.0 mm (1.3 in)
1980	56.6 mm (2.2 in)
1981	73.7 mm (2.9 in)
1982	35.1 mm (1.4 in)
1983	113.0 mm (4.4 in)
1984	49.8 mm (2.0 in)
1985	50.8 mm (2.0 in)
1986	61.2 mm (2.4 in)
1987	52.1 mm (2.1 in)
1988	38.1 mm (1.5 in)
1989	49.5 mm (1.9 in)
1990	58.4 mm (2.3 in)
1991	58.9 mm (2.3 in)

Wettest five days (Rx5day)

The wettest five days of the year at Bethlehem, 1893 to 1991. The record is 144.5 mm (5.7 in) in 1938, marked on the chart; the median year is 68.8 mm (2.7 in).

Wettest five days (Rx5day) at Bethlehem by year
Year	Wettest five days (Rx5day)
1893	58.9 mm (2.3 in)
1894	38.1 mm (1.5 in)
1895	43.2 mm (1.7 in)
1896	62.8 mm (2.5 in)
1897	72.0 mm (2.8 in)
1898	53.6 mm (2.1 in)
1899	54.8 mm (2.2 in)
1900	67.4 mm (2.7 in)
1901	52.3 mm (2.1 in)
1902	104.9 mm (4.1 in)
1903	48.2 mm (1.9 in)
1904	69.8 mm (2.7 in)
1905	61.0 mm (2.4 in)
1906	82.5 mm (3.2 in)
1907	71.1 mm (2.8 in)
1908	43.0 mm (1.7 in)
1909	41.3 mm (1.6 in)
1910	37.7 mm (1.5 in)
1911	60.0 mm (2.4 in)
1912	58.4 mm (2.3 in)
1913	41.1 mm (1.6 in)
1914	42.1 mm (1.7 in)
1915	30.8 mm (1.2 in)
1916	56.7 mm (2.2 in)
1917	71.8 mm (2.8 in)
1918	79.9 mm (3.1 in)
1919	82.8 mm (3.3 in)
1920	72.4 mm (2.9 in)
1921	27.5 mm (1.1 in)
1922	60.0 mm (2.4 in)
1923	72.1 mm (2.8 in)
1924	106.5 mm (4.2 in)
1925	90.3 mm (3.6 in)
1926	68.1 mm (2.7 in)
1927	99.9 mm (3.9 in)
1928	58.5 mm (2.3 in)
1929	49.5 mm (1.9 in)
1930	64.5 mm (2.5 in)
1931	63.1 mm (2.5 in)
1932	70.4 mm (2.8 in)
1933	51.5 mm (2.0 in)
1934	59.9 mm (2.4 in)
1935	50.8 mm (2.0 in)
1936	67.0 mm (2.6 in)
1937	81.3 mm (3.2 in)
1938	144.5 mm (5.7 in)
1939	77.6 mm (3.1 in)
1940	78.8 mm (3.1 in)
1941	36.4 mm (1.4 in)
1942	86.7 mm (3.4 in)
1943	79.5 mm (3.1 in)
1944	64.4 mm (2.5 in)
1945	86.1 mm (3.4 in)
1946	89.9 mm (3.5 in)
1947	114.3 mm (4.5 in)
1948	65.0 mm (2.6 in)
1949	61.9 mm (2.4 in)
1950	90.2 mm (3.6 in)
1951	68.8 mm (2.7 in)
1952	139.2 mm (5.5 in)
1953	74.2 mm (2.9 in)
1954	116.9 mm (4.6 in)
1955	66.5 mm (2.6 in)
1956	85.8 mm (3.4 in)
1957	87.8 mm (3.5 in)
1958	67.9 mm (2.7 in)
1959	86.9 mm (3.4 in)
1960	85.2 mm (3.4 in)
1961	45.1 mm (1.8 in)
1962	110.3 mm (4.3 in)
1963	59.8 mm (2.4 in)
1964	76.9 mm (3.0 in)
1965	49.7 mm (2.0 in)
1966	59.9 mm (2.4 in)
1967	74.2 mm (2.9 in)
1968	69.9 mm (2.8 in)
1969	100.1 mm (3.9 in)
1970	65.8 mm (2.6 in)
1971	57.4 mm (2.3 in)
1972	69.4 mm (2.7 in)
1973	87.9 mm (3.5 in)
1974	54.9 mm (2.2 in)
1975	75.9 mm (3.0 in)
1976	58.0 mm (2.3 in)
1977	62.7 mm (2.5 in)
1978	101.8 mm (4.0 in)
1979	57.4 mm (2.3 in)
1980	116.7 mm (4.6 in)
1981	91.4 mm (3.6 in)
1982	58.3 mm (2.3 in)
1983	119.9 mm (4.7 in)
1984	126.3 mm (5.0 in)
1985	59.4 mm (2.3 in)
1986	80.8 mm (3.2 in)
1987	77.5 mm (3.1 in)
1988	56.2 mm (2.2 in)
1989	113.8 mm (4.5 in)
1990	118.9 mm (4.7 in)
1991	77.9 mm (3.1 in)

Longest dry spell (CDD)

The longest dry spell of the year at Bethlehem, 1893 to 1991. The record is 28 days in 1925, marked on the chart; the median year is 13 days.

Longest dry spell (CDD) at Bethlehem by year
Year	Longest dry spell (CDD)
1893	3 days
1894	4 days
1895	8 days
1896	2 days
1897	3 days
1898	3 days
1899	3 days
1900	2 days
1901	14 days
1902	11 days
1903	23 days
1904	17 days
1905	14 days
1906	7 days
1907	22 days
1908	6 days
1909	3 days
1910	2 days
1911	3 days
1912	2 days
1913	5 days
1914	4 days
1915	5 days
1916	9 days
1917	3 days
1918	5 days
1919	9 days
1920	6 days
1921	7 days
1922	14 days
1923	19 days
1924	23 days
1925	28 days
1926	12 days
1927	22 days
1928	16 days
1929	16 days
1930	17 days
1931	15 days
1932	19 days
1933	15 days
1934	17 days
1935	15 days
1936	13 days
1937	21 days
1938	23 days
1939	20 days
1940	10 days
1941	13 days
1942	15 days
1943	16 days
1944	19 days
1945	14 days
1946	26 days
1947	17 days
1948	13 days
1949	11 days
1950	14 days
1951	16 days
1952	19 days
1953	23 days
1954	13 days
1955	13 days
1956	15 days
1957	16 days
1958	14 days
1959	16 days
1960	10 days
1961	14 days
1962	13 days
1963	16 days
1964	15 days
1965	24 days
1966	14 days
1967	11 days
1968	12 days
1969	10 days
1970	17 days
1971	13 days
1972	11 days
1973	12 days
1974	16 days
1975	12 days
1976	10 days
1977	15 days
1978	18 days
1979	15 days
1980	23 days
1981	13 days
1982	13 days
1983	11 days
1984	9 days
1985	13 days
1986	13 days
1987	20 days
1988	14 days
1989	13 days
1990	20 days
1991	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

74 years with a frost

Across 74 years with a frost, the median last spring frost at Bethlehem falls on 21 May and the median first autumn frost on 22 September, which leaves a median of 125 days between them.

In 1945 to 1988 the median growing season was 118 days. That is 10 days fewer than in 1894 to 1929.

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

Frost dates and growing season at Bethlehem
Measure	Median, all years	Earliest period (1894 to 1929)	Recent period (1945 to 1988)	Recent against earliest	Fitted trend
Last spring frost	21 May	17 May	25 May	8 days later	+1.6 days per decade
First autumn frost	22 September	22 September	20 September	2 days earlier	-0.4 days per decade
Growing days	125 days	128 days	118 days	10 days fewer	-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

62 years, 1904 to 1991

A day with at least 47.8 mm (1.9 in) of rain is expected about once in 2 years. A day with at least 113.7 mm (4.5 in) of rain is expected about once in 100 years.

Rainfall return levels at Bethlehem: the daily rain expected about once in a given number of years
Expected about once in	A day with at least	Note
2 years	47.8 mm (1.9 in)
5 years	63.1 mm (2.5 in)
10 years	74.1 mm (2.9 in)
25 years	89.1 mm (3.5 in)
50 years	101.1 mm (4.0 in)
100 years	113.7 mm (4.5 in)	Longer than the 62 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, 62 years of values from 1904 to 1991.

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: 113.0 mm (4.4 in) in 1983; 91.4 mm (3.6 in) in 1924; 85.9 mm (3.4 in) in 1954.

Station Changes

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

Download the Data

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