Bethlehem Weather Records (USC00360629)

Record envelope, standing records and threshold days for Bethlehem (USC00360629), Pennsylvania, United States, with 42 years of record.

Key Facts for Bethlehem

Bethlehem (USC00360629) is a weather station in Pennsylvania, United States at 40.62 latitude and -75.38 longitude, 73 m (240 ft) above sea level.
The station reports from 1940 to 1981, 42 years of record.
124 records set at Bethlehem still stand.
Records are tracked for prcp, snow, snwd: an element needs 30 years of data to be eligible.
Bethlehem set a daily record precipitation of 21.6 mm (0.9 in) on 22 February 1981.

About the Station

Location: Pennsylvania, United States, 40.62 latitude, -75.38 longitude.
Elevation: 73 m (240 ft).
Period of record: 1940 to 1981, 42 years.
Eligible elements: 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	n/a	n/a	n/a	n/a
Feb	n/a	n/a	n/a	n/a
Mar	n/a	n/a	n/a	n/a
Apr	n/a	n/a	n/a	n/a
May	33.9 C (93.0 F)	2.2 C (36.0 F)	n/a	n/a
Jun	n/a	n/a	n/a	n/a
Jul	n/a	n/a	n/a	n/a
Aug	n/a	n/a	n/a	n/a
Sep	n/a	n/a	n/a	n/a
Oct	n/a	n/a	n/a	n/a
Nov	n/a	n/a	n/a	n/a
Dec	n/a	n/a	n/a	n/a

Which Years Hold Standing Records

124 standing records

124 records at Bethlehem still stand. 1948 holds the most, with 124.

Wettest Day of Each Month

Aug: 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 13 August 1955.

Record daily precipitation for each month at Bethlehem
Month	Record daily precipitation (mm)	Date
Jan	64.0 mm (2.5 in)	4 January 1944
Feb	50.8 mm (2.0 in)	8 February 1965
Mar	55.9 mm (2.2 in)	7 March 1967
Apr	58.4 mm (2.3 in)	25 April 1968
May	61.0 mm (2.4 in)	24 May 1979
Jun	77.7 mm (3.1 in)	23 June 1972
Jul	95.0 mm (3.7 in)	28 July 1951
Aug	113.0 mm (4.4 in)	13 August 1955
Sep	96.3 mm (3.8 in)	6 September 1949
Oct	67.3 mm (2.6 in)	25 October 1968
Nov	77.5 mm (3.1 in)	9 November 1943
Dec	67.1 mm (2.6 in)	7 December 1953

Period of Record Coverage

1948 to 1948

1 years of record at Bethlehem, 1948 to 1948. 1 years have data for under 90 percent of days and are left out of rankings: 1948.

Latest Records

Latest records at Bethlehem
Date	Station	Record	Value	Beat old record by	Old record stood	Significance
22 February 1981	Bethlehem, US	daily rain	21.6 mm (0.9 in)	6.1 mm (0.24 in)	30 years	19 of 100 (Routine)
10 February 1981	Bethlehem, US	daily rain	17.8 mm (0.7 in)	4.1 mm (0.16 in)	22 years	14 of 100 (Routine)
25 November 1980	Bethlehem, US	daily rain	35.1 mm (1.4 in)	5.9 mm (0.23 in)	9 years	10 of 100 (Routine)
26 October 1980	Bethlehem, US	daily rain	42.7 mm (1.7 in)	11.5 mm (0.5 in)	13 years	17 of 100 (Routine)
29 April 1980	Bethlehem, US	daily rain	14.0 mm (0.6 in)	3.1 mm (0.12 in)	28 years	15 of 100 (Routine)
27 November 1979	Bethlehem, US	daily rain	37.6 mm (1.5 in)	17.3 mm (0.7 in)	38 years	29 of 100 (Routine)
6 October 1979	Bethlehem, US	daily rain	23.1 mm (0.9 in)	4.8 mm (0.19 in)	24 years	15 of 100 (Routine)
4 October 1979	Bethlehem, US	daily rain	19.1 mm (0.8 in)	6.9 mm (0.27 in)	37 years	20 of 100 (Routine)
22 September 1979	Bethlehem, US	daily rain	61.0 mm (2.4 in)	9.4 mm (0.37 in)	32 years	19 of 100 (Routine)
30 July 1979	Bethlehem, US	daily rain	61.0 mm (2.4 in)	36.9 mm (1.5 in)	36 years	41 of 100 (Notable)
17 July 1979	Bethlehem, US	daily rain	21.1 mm (0.8 in)	4.8 mm (0.19 in)	6 years	9 of 100 (Routine)
15 July 1979	Bethlehem, US	daily rain	44.5 mm (1.8 in)	1.1 mm (0.04 in)	18 years	9 of 100 (Routine)
24 May 1979	Bethlehem, US	monthly rain	61.0 mm (2.4 in)	3.6 mm (0.14 in)	31 years	26 of 100 (Routine)
9 April 1979	Bethlehem, US	daily rain	15.2 mm (0.6 in)	0.2 mm (0.01 in)	21 years	10 of 100 (Routine)
24 February 1979	Bethlehem, US	daily rain	30.0 mm (1.2 in)	9.7 mm (0.38 in)	4 years	15 of 100 (Routine)
25 January 1979	Bethlehem, US	daily rain	43.4 mm (1.7 in)	13.4 mm (0.5 in)	25 years	23 of 100 (Routine)
21 January 1979	Bethlehem, US	daily rain	61.0 mm (2.4 in)	46.0 mm (1.8 in)	15 years	48 of 100 (Notable)
8 January 1979	Bethlehem, US	daily rain	50.5 mm (2.0 in)	23.8 mm (0.9 in)	3 years	26 of 100 (Routine)
10 December 1978	Bethlehem, US	daily rain	22.1 mm (0.9 in)	1.5 mm (0.06 in)	21 years	10 of 100 (Routine)
28 November 1978	Bethlehem, US	daily snowfall	7.6 cm (3.0 in)	3.8 cm (1.5 in)	28 years	18 of 100 (Routine)

Extremes by Year

1940 to 1981

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)	33.9 C (93.0 F)	1948	33.9 C (93.0 F)	1
Coldest night (TNn)	2.2 C (36.0 F)	1948	2.2 C (36.0 F)	1
Wettest day (Rx1day)	113.0 mm (4.4 in)	1955	57.9 mm (2.3 in)	42
Wettest five days (Rx5day)	201.6 mm (7.9 in)	1975	94.3 mm (3.7 in)	42
Longest dry spell (CDD)	34 days	1980	19 days	42

Hottest day (TXx)

The hottest day of the year at Bethlehem, 1940 to 1981. The record is 33.9 C (93.0 F) in 1948, marked on the chart; the median year is 33.9 C (93.0 F).

Hottest day (TXx) at Bethlehem by year
Year	Hottest day (TXx)
1940	n/a
1941	n/a
1942	n/a
1943	n/a
1944	n/a
1945	n/a
1946	n/a
1947	n/a
1948	33.9 C (93.0 F)
1949	n/a
1950	n/a
1951	n/a
1952	n/a
1953	n/a
1954	n/a
1955	n/a
1956	n/a
1957	n/a
1958	n/a
1959	n/a
1960	n/a
1961	n/a
1962	n/a
1963	n/a
1964	n/a
1965	n/a
1966	n/a
1967	n/a
1968	n/a
1969	n/a
1970	n/a
1971	n/a
1972	n/a
1973	n/a
1974	n/a
1975	n/a
1976	n/a
1977	n/a
1978	n/a
1979	n/a
1980	n/a
1981	n/a

Coldest night (TNn)

The coldest night of the year at Bethlehem, 1940 to 1981. The record is 2.2 C (36.0 F) in 1948, marked on the chart; the median year is 2.2 C (36.0 F).

Coldest night (TNn) at Bethlehem by year
Year	Coldest night (TNn)
1940	n/a
1941	n/a
1942	n/a
1943	n/a
1944	n/a
1945	n/a
1946	n/a
1947	n/a
1948	2.2 C (36.0 F)
1949	n/a
1950	n/a
1951	n/a
1952	n/a
1953	n/a
1954	n/a
1955	n/a
1956	n/a
1957	n/a
1958	n/a
1959	n/a
1960	n/a
1961	n/a
1962	n/a
1963	n/a
1964	n/a
1965	n/a
1966	n/a
1967	n/a
1968	n/a
1969	n/a
1970	n/a
1971	n/a
1972	n/a
1973	n/a
1974	n/a
1975	n/a
1976	n/a
1977	n/a
1978	n/a
1979	n/a
1980	n/a
1981	n/a

Wettest day (Rx1day)

The wettest day of the year at Bethlehem, 1940 to 1981. The record is 113.0 mm (4.4 in) in 1955, marked on the chart; the median year is 57.9 mm (2.3 in).

Wettest day (Rx1day) at Bethlehem by year
Year	Wettest day (Rx1day)
1940	46.2 mm (1.8 in)
1941	37.1 mm (1.5 in)
1942	91.7 mm (3.6 in)
1943	77.5 mm (3.1 in)
1944	64.0 mm (2.5 in)
1945	42.7 mm (1.7 in)
1946	51.6 mm (2.0 in)
1947	52.8 mm (2.1 in)
1948	57.4 mm (2.3 in)
1949	96.3 mm (3.8 in)
1950	54.1 mm (2.1 in)
1951	95.0 mm (3.7 in)
1952	77.2 mm (3.0 in)
1953	67.1 mm (2.6 in)
1954	82.0 mm (3.2 in)
1955	113.0 mm (4.4 in)
1956	49.3 mm (1.9 in)
1957	58.7 mm (2.3 in)
1958	51.8 mm (2.0 in)
1959	55.1 mm (2.2 in)
1960	73.2 mm (2.9 in)
1961	59.2 mm (2.3 in)
1962	53.8 mm (2.1 in)
1963	60.2 mm (2.4 in)
1964	38.1 mm (1.5 in)
1965	50.8 mm (2.0 in)
1966	50.8 mm (2.0 in)
1967	56.9 mm (2.2 in)
1968	67.3 mm (2.6 in)
1969	76.2 mm (3.0 in)
1970	45.7 mm (1.8 in)
1971	101.6 mm (4.0 in)
1972	77.7 mm (3.1 in)
1973	50.8 mm (2.0 in)
1974	52.1 mm (2.1 in)
1975	69.3 mm (2.7 in)
1976	58.4 mm (2.3 in)
1977	53.3 mm (2.1 in)
1978	63.0 mm (2.5 in)
1979	61.0 mm (2.4 in)
1980	42.7 mm (1.7 in)
1981	21.6 mm (0.9 in)

Wettest five days (Rx5day)

The wettest five days of the year at Bethlehem, 1940 to 1981. The record is 201.6 mm (7.9 in) in 1975, marked on the chart; the median year is 94.3 mm (3.7 in).

Wettest five days (Rx5day) at Bethlehem by year
Year	Wettest five days (Rx5day)
1940	73.7 mm (2.9 in)
1941	50.0 mm (2.0 in)
1942	100.6 mm (4.0 in)
1943	108.6 mm (4.3 in)
1944	90.9 mm (3.6 in)
1945	88.1 mm (3.5 in)
1946	82.1 mm (3.2 in)
1947	88.6 mm (3.5 in)
1948	104.1 mm (4.1 in)
1949	96.3 mm (3.8 in)
1950	87.9 mm (3.5 in)
1951	128.3 mm (5.1 in)
1952	120.4 mm (4.7 in)
1953	108.5 mm (4.3 in)
1954	113.5 mm (4.5 in)
1955	195.9 mm (7.7 in)
1956	63.3 mm (2.5 in)
1957	110.7 mm (4.4 in)
1958	76.2 mm (3.0 in)
1959	98.5 mm (3.9 in)
1960	133.1 mm (5.2 in)
1961	86.9 mm (3.4 in)
1962	64.0 mm (2.5 in)
1963	109.9 mm (4.3 in)
1964	51.6 mm (2.0 in)
1965	59.7 mm (2.4 in)
1966	64.6 mm (2.5 in)
1967	95.8 mm (3.8 in)
1968	115.1 mm (4.5 in)
1969	166.4 mm (6.6 in)
1970	77.5 mm (3.1 in)
1971	161.3 mm (6.4 in)
1972	92.7 mm (3.6 in)
1973	97.0 mm (3.8 in)
1974	61.0 mm (2.4 in)
1975	201.6 mm (7.9 in)
1976	108.6 mm (4.3 in)
1977	79.1 mm (3.1 in)
1978	83.9 mm (3.3 in)
1979	125.5 mm (4.9 in)
1980	58.0 mm (2.3 in)
1981	41.7 mm (1.6 in)

Longest dry spell (CDD)

The longest dry spell of the year at Bethlehem, 1940 to 1981. The record is 34 days in 1980, marked on the chart; the median year is 19 days.

Longest dry spell (CDD) at Bethlehem by year
Year	Longest dry spell (CDD)
1940	10 days
1941	22 days
1942	19 days
1943	24 days
1944	18 days
1945	16 days
1946	14 days
1947	25 days
1948	24 days
1949	20 days
1950	15 days
1951	13 days
1952	17 days
1953	17 days
1954	13 days
1955	19 days
1956	15 days
1957	16 days
1958	20 days
1959	18 days
1960	18 days
1961	15 days
1962	23 days
1963	31 days
1964	30 days
1965	20 days
1966	21 days
1967	19 days
1968	26 days
1969	17 days
1970	17 days
1971	22 days
1972	16 days
1973	23 days
1974	15 days
1975	11 days
1976	22 days
1977	22 days
1978	19 days
1979	13 days
1980	34 days
1981	8 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.

Rainfall Return Levels

30 years, 1943 to 1980

A day with at least 58.5 mm (2.3 in) of rain is expected about once in 2 years. A day with at least 127.1 mm (5.0 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	58.5 mm (2.3 in)
5 years	73.1 mm (2.9 in)
10 years	84.1 mm (3.3 in)
25 years	99.8 mm (3.9 in)
50 years	112.8 mm (4.4 in)	Longer than the 30 years of record
100 years	127.1 mm (5.0 in)	Longer than the 30 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, 30 years of values from 1943 to 1980.

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 1955; 96.3 mm (3.8 in) in 1949; 95.0 mm (3.7 in) in 1951.

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 2026-10-14 (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).