West Grove 1 SE Weather Records (USC00369503)

Record envelope, standing records and threshold days for West Grove 1 SE (USC00369503), Pennsylvania, United States, with 50 years of record.

Key Facts for West Grove 1 SE

West Grove 1 SE (USC00369503) is a weather station in Pennsylvania, United States at 39.80 latitude and -75.80 longitude, 137 m (449 ft) above sea level.
The station reports from 1927 to 1976, 50 years of record.
1,464 records set at West Grove 1 SE still stand.
Records are tracked for prcp, snow: an element needs 30 years of data to be eligible.
West Grove 1 SE set a daily record precipitation of 76.2 mm (3.0 in) on 30 July 1976.

About the Station

Location: Pennsylvania, United States, 39.80 latitude, -75.80 longitude.
Elevation: 137 m (449 ft).
Period of record: 1927 to 1976, 50 years.
Eligible elements: 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 West Grove 1 SE. 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 West Grove 1 SE, with 2026 drawn through them
Month	Highest record high	Lowest record low	2026 highest maximum	2026 lowest minimum
Jan	21.1 C (70.0 F)	-20.0 C (-4.0 F)	n/a	n/a
Feb	20.0 C (68.0 F)	-16.7 C (1.9 F)	n/a	n/a
Mar	26.1 C (79.0 F)	-13.9 C (7.0 F)	n/a	n/a
Apr	33.3 C (91.9 F)	-6.7 C (19.9 F)	n/a	n/a
May	32.8 C (91.0 F)	-1.7 C (28.9 F)	n/a	n/a
Jun	35.6 C (96.1 F)	3.3 C (37.9 F)	n/a	n/a
Jul	37.8 C (100.0 F)	7.8 C (46.0 F)	n/a	n/a
Aug	36.7 C (98.1 F)	6.1 C (43.0 F)	n/a	n/a
Sep	36.1 C (97.0 F)	1.1 C (34.0 F)	n/a	n/a
Oct	29.4 C (84.9 F)	-6.7 C (19.9 F)	n/a	n/a
Nov	26.7 C (80.1 F)	-9.4 C (15.1 F)	n/a	n/a
Dec	20.0 C (68.0 F)	-16.1 C (3.0 F)	n/a	n/a

Which Years Hold Standing Records

1,464 standing records

1,464 records at West Grove 1 SE still stand. 1965 holds the most, with 136.

All-Time Record Progression

2 new records

2 all-time records were set at West Grove 1 SE between 14 January 1964 and 28 August 1971. Each dot is a new record.

When West Grove 1 SE set new all-time records
Date	Kind	Detail
1964-01-14	Record daily snowfall	Record daily snowfall 40.6 cm (16.0 in)
1971-08-28	Record daily precipitation	Record daily precipitation 153.2 mm (6.0 in)

Wettest Day of Each Month

Aug: 153.2 mm (6.0 in)

The wettest day on record for each calendar month at West Grove 1 SE. The most was 153.2 mm (6.0 in) on 28 August 1971.

Record daily precipitation for each month at West Grove 1 SE
Month	Record daily precipitation (mm)	Date
Jan	68.6 mm (2.7 in)	2 January 1948
Feb	50.8 mm (2.0 in)	8 February 1965
Mar	68.6 mm (2.7 in)	7 March 1967
Apr	61.0 mm (2.4 in)	15 April 1970
May	69.9 mm (2.8 in)	29 May 1968
Jun	146.1 mm (5.8 in)	23 June 1972
Jul	133.4 mm (5.3 in)	10 July 1931
Aug	153.2 mm (6.0 in)	28 August 1971
Sep	96.5 mm (3.8 in)	20 September 1938
Oct	59.9 mm (2.4 in)	23 October 1956
Nov	68.8 mm (2.7 in)	7 November 1963
Dec	55.9 mm (2.2 in)	3 December 1967

Period of Record Coverage

1963 to 1976

14 years of record at West Grove 1 SE, 1963 to 1976. 4 years have data for under 90 percent of days and are left out of rankings: 1963, 1968, 1974, 1976.

Days with data per year at West Grove 1 SE
Year	Days with data	Share of year	Complete
1963	265	73%	No
1964	357	98%	Yes
1965	341	93%	Yes
1966	345	95%	Yes
1967	362	99%	Yes
1968	321	88%	No
1969	358	98%	Yes
1970	349	96%	Yes
1971	355	97%	Yes
1972	355	97%	Yes
1973	351	96%	Yes
1974	322	88%	No
1975	353	97%	Yes
1976	236	64%	No

Latest Records

Latest records at West Grove 1 SE
Date	Station	Record	Value	Beat old record by	Old record stood	Significance
30 July 1976	West Grove 1 SE, US	daily rain	76.2 mm (3.0 in)	32.3 mm (1.3 in)	16 years	27 of 100 (Routine)
12 July 1976	West Grove 1 SE, US	daily rain	30.5 mm (1.2 in)	0.5 mm (0.02 in)	33 years	14 of 100 (Routine)
2 May 1976	West Grove 1 SE, US	daily rain	39.9 mm (1.6 in)	31.0 mm (1.2 in)	1 year	33 of 100 (Routine)
27 January 1976	West Grove 1 SE, US	daily rain	22.9 mm (0.9 in)	1.1 mm (0.04 in)	26 years	14 of 100 (Routine)
8 January 1976	West Grove 1 SE, US	daily rain	17.8 mm (0.7 in)	4.8 mm (0.19 in)	44 years	20 of 100 (Routine)
13 November 1975	West Grove 1 SE, US	daily rain	50.8 mm (2.0 in)	19.8 mm (0.8 in)	37 years	29 of 100 (Routine)
12 October 1975	West Grove 1 SE, US	daily rain	12.2 mm (0.5 in)	3.8 mm (0.15 in)	24 years	14 of 100 (Routine)
24 September 1975	West Grove 1 SE, US	daily rain	45.7 mm (1.8 in)	21.3 mm (0.8 in)	20 years	23 of 100 (Routine)
23 September 1975	West Grove 1 SE, US	daily rain	50.8 mm (2.0 in)	5.1 mm (0.20 in)	17 years	12 of 100 (Routine)
21 July 1975	West Grove 1 SE, US	daily rain	76.2 mm (3.0 in)	13.2 mm (0.5 in)	18 years	16 of 100 (Routine)
16 July 1975	West Grove 1 SE, US	daily rain	61.0 mm (2.4 in)	31.3 mm (1.2 in)	6 years	24 of 100 (Routine)
14 July 1975	West Grove 1 SE, US	daily rain	101.6 mm (4.0 in)	61.0 mm (2.4 in)	46 years	54 of 100 (Notable)
1 June 1975	West Grove 1 SE, US	daily rain (Tie)	63.5 mm (2.5 in)	tie	18 years	2 of 100 (Routine)
2 May 1975	West Grove 1 SE, US	daily rain	8.9 mm (0.35 in)	0.3 mm (0.01 in)	13 years	8 of 100 (Routine)
26 April 1975	West Grove 1 SE, US	daily rain	45.7 mm (1.8 in)	1.2 mm (0.05 in)	1 year	5 of 100 (Routine)
20 March 1975	West Grove 1 SE, US	monthly rain (Tie)	68.6 mm (2.7 in)	tie	8 years	4 of 100 (Routine)
25 February 1975	West Grove 1 SE, US	daily rain	19.1 mm (0.8 in)	7.7 mm (0.30 in)	9 years	14 of 100 (Routine)
24 February 1975	West Grove 1 SE, US	daily rain	16.5 mm (0.6 in)	3.3 mm (0.13 in)	12 years	10 of 100 (Routine)
25 January 1975	West Grove 1 SE, US	daily rain	32.5 mm (1.3 in)	0.2 mm (0.01 in)	36 years	15 of 100 (Routine)
16 October 1974	West Grove 1 SE, US	daily rain	34.3 mm (1.4 in)	7.4 mm (0.29 in)	32 years	19 of 100 (Routine)

Extremes by Year

1927 to 1976

Yearly extremes at West Grove 1 SE: 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)	1966	34.4 C (93.9 F)	14
Coldest night (TNn)	-20.0 C (-4.0 F)	1970	-16.4 C (2.5 F)	14
Wettest day (Rx1day)	153.2 mm (6.0 in)	1971	63.5 mm (2.5 in)	50
Wettest five days (Rx5day)	244.4 mm (9.6 in)	1975	91.8 mm (3.6 in)	50
Longest dry spell (CDD)	36 days	1968	18 days	50

Hottest day (TXx)

The hottest day of the year at West Grove 1 SE, 1927 to 1976. The record is 37.8 C (100.0 F) in 1966, marked on the chart; the median year is 34.4 C (93.9 F).

Hottest day (TXx) at West Grove 1 SE by year
Year	Hottest day (TXx)
1927	n/a
1928	n/a
1929	n/a
1930	n/a
1931	n/a
1932	n/a
1933	n/a
1934	n/a
1935	n/a
1936	n/a
1937	n/a
1938	n/a
1939	n/a
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	n/a
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	35.0 C (95.0 F)
1964	35.6 C (96.1 F)
1965	34.4 C (93.9 F)
1966	37.8 C (100.0 F)
1967	35.6 C (96.1 F)
1968	34.4 C (93.9 F)
1969	33.9 C (93.0 F)
1970	33.3 C (91.9 F)
1971	34.4 C (93.9 F)
1972	33.9 C (93.0 F)
1973	36.7 C (98.1 F)
1974	33.3 C (91.9 F)
1975	35.0 C (95.0 F)
1976	33.3 C (91.9 F)

Coldest night (TNn)

The coldest night of the year at West Grove 1 SE, 1927 to 1976. The record is -20.0 C (-4.0 F) in 1970, marked on the chart; the median year is -16.4 C (2.5 F).

Coldest night (TNn) at West Grove 1 SE by year
Year	Coldest night (TNn)
1927	n/a
1928	n/a
1929	n/a
1930	n/a
1931	n/a
1932	n/a
1933	n/a
1934	n/a
1935	n/a
1936	n/a
1937	n/a
1938	n/a
1939	n/a
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	n/a
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	-16.1 C (3.0 F)
1964	-15.6 C (3.9 F)
1965	-18.3 C (-0.9 F)
1966	-17.2 C (1.0 F)
1967	-16.7 C (1.9 F)
1968	-17.2 C (1.0 F)
1969	-12.8 C (9.0 F)
1970	-20.0 C (-4.0 F)
1971	-16.1 C (3.0 F)
1972	-16.7 C (1.9 F)
1973	-15.6 C (3.9 F)
1974	-11.7 C (10.9 F)
1975	-13.3 C (8.1 F)
1976	-17.2 C (1.0 F)

Wettest day (Rx1day)

The wettest day of the year at West Grove 1 SE, 1927 to 1976. The record is 153.2 mm (6.0 in) in 1971, marked on the chart; the median year is 63.5 mm (2.5 in).

Wettest day (Rx1day) at West Grove 1 SE by year
Year	Wettest day (Rx1day)
1927	63.5 mm (2.5 in)
1928	63.5 mm (2.5 in)
1929	52.3 mm (2.1 in)
1930	41.9 mm (1.6 in)
1931	133.4 mm (5.3 in)
1932	45.7 mm (1.8 in)
1933	96.0 mm (3.8 in)
1934	73.2 mm (2.9 in)
1935	115.6 mm (4.6 in)
1936	61.0 mm (2.4 in)
1937	85.6 mm (3.4 in)
1938	96.5 mm (3.8 in)
1939	101.6 mm (4.0 in)
1940	57.2 mm (2.3 in)
1941	62.5 mm (2.5 in)
1942	65.5 mm (2.6 in)
1943	50.8 mm (2.0 in)
1944	81.8 mm (3.2 in)
1945	45.7 mm (1.8 in)
1946	84.6 mm (3.3 in)
1947	58.9 mm (2.3 in)
1948	68.6 mm (2.7 in)
1949	63.5 mm (2.5 in)
1950	119.4 mm (4.7 in)
1951	55.4 mm (2.2 in)
1952	75.2 mm (3.0 in)
1953	53.1 mm (2.1 in)
1954	41.9 mm (1.6 in)
1955	121.4 mm (4.8 in)
1956	63.5 mm (2.5 in)
1957	51.6 mm (2.0 in)
1958	61.0 mm (2.4 in)
1959	70.6 mm (2.8 in)
1960	67.1 mm (2.6 in)
1961	43.2 mm (1.7 in)
1962	47.5 mm (1.9 in)
1963	68.8 mm (2.7 in)
1964	45.7 mm (1.8 in)
1965	50.8 mm (2.0 in)
1966	78.7 mm (3.1 in)
1967	81.3 mm (3.2 in)
1968	69.9 mm (2.8 in)
1969	51.1 mm (2.0 in)
1970	61.0 mm (2.4 in)
1971	153.2 mm (6.0 in)
1972	146.1 mm (5.8 in)
1973	58.4 mm (2.3 in)
1974	50.8 mm (2.0 in)
1975	101.6 mm (4.0 in)
1976	76.2 mm (3.0 in)

Wettest five days (Rx5day)

The wettest five days of the year at West Grove 1 SE, 1927 to 1976. The record is 244.4 mm (9.6 in) in 1975, marked on the chart; the median year is 91.8 mm (3.6 in).

Wettest five days (Rx5day) at West Grove 1 SE by year
Year	Wettest five days (Rx5day)
1927	77.2 mm (3.0 in)
1928	109.2 mm (4.3 in)
1929	108.0 mm (4.3 in)
1930	71.7 mm (2.8 in)
1931	150.4 mm (5.9 in)
1932	75.8 mm (3.0 in)
1933	176.8 mm (7.0 in)
1934	76.2 mm (3.0 in)
1935	172.2 mm (6.8 in)
1936	80.5 mm (3.2 in)
1937	136.9 mm (5.4 in)
1938	187.9 mm (7.4 in)
1939	135.1 mm (5.3 in)
1940	77.9 mm (3.1 in)
1941	80.7 mm (3.2 in)
1942	120.6 mm (4.7 in)
1943	87.6 mm (3.4 in)
1944	173.8 mm (6.8 in)
1945	100.4 mm (4.0 in)
1946	135.6 mm (5.3 in)
1947	78.2 mm (3.1 in)
1948	75.0 mm (3.0 in)
1949	73.1 mm (2.9 in)
1950	119.4 mm (4.7 in)
1951	94.5 mm (3.7 in)
1952	113.0 mm (4.4 in)
1953	87.1 mm (3.4 in)
1954	65.5 mm (2.6 in)
1955	212.0 mm (8.3 in)
1956	88.9 mm (3.5 in)
1957	94.7 mm (3.7 in)
1958	125.5 mm (4.9 in)
1959	152.5 mm (6.0 in)
1960	157.3 mm (6.2 in)
1961	76.2 mm (3.0 in)
1962	64.4 mm (2.5 in)
1963	91.6 mm (3.6 in)
1964	74.1 mm (2.9 in)
1965	62.3 mm (2.5 in)
1966	91.9 mm (3.6 in)
1967	116.1 mm (4.6 in)
1968	91.7 mm (3.6 in)
1969	84.1 mm (3.3 in)
1970	73.6 mm (2.9 in)
1971	197.1 mm (7.8 in)
1972	198.2 mm (7.8 in)
1973	78.1 mm (3.1 in)
1974	66.8 mm (2.6 in)
1975	244.4 mm (9.6 in)
1976	79.8 mm (3.1 in)

Longest dry spell (CDD)

The longest dry spell of the year at West Grove 1 SE, 1927 to 1976. The record is 36 days in 1968, marked on the chart; the median year is 18 days.

Longest dry spell (CDD) at West Grove 1 SE by year
Year	Longest dry spell (CDD)
1927	14 days
1928	16 days
1929	13 days
1930	24 days
1931	19 days
1932	27 days
1933	15 days
1934	19 days
1935	21 days
1936	20 days
1937	14 days
1938	13 days
1939	25 days
1940	14 days
1941	28 days
1942	18 days
1943	24 days
1944	18 days
1945	14 days
1946	18 days
1947	22 days
1948	18 days
1949	17 days
1950	12 days
1951	25 days
1952	25 days
1953	18 days
1954	13 days
1955	21 days
1956	15 days
1957	14 days
1958	23 days
1959	13 days
1960	16 days
1961	15 days
1962	15 days
1963	27 days
1964	29 days
1965	16 days
1966	20 days
1967	19 days
1968	36 days
1969	31 days
1970	16 days
1971	21 days
1972	21 days
1973	15 days
1974	17 days
1975	15 days
1976	19 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

45 years, 1930 to 1975

A day with at least 66.6 mm (2.6 in) of rain is expected about once in 2 years. A day with at least 187.9 mm (7.4 in) of rain is expected about once in 100 years.

Rainfall return levels at West Grove 1 SE: the daily rain expected about once in a given number of years
Expected about once in	A day with at least	Note
2 years	66.6 mm (2.6 in)
5 years	90.6 mm (3.6 in)
10 years	109.4 mm (4.3 in)
25 years	137.2 mm (5.4 in)
50 years	161.0 mm (6.3 in)	Longer than the 45 years of record
100 years	187.9 mm (7.4 in)	Longer than the 45 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, 45 years of values from 1930 to 1975.

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: 153.2 mm (6.0 in) in 1971; 146.1 mm (5.8 in) in 1972; 133.4 mm (5.3 in) in 1931.

Download the Data

Data for West Grove 1 SE standing records by year: CSV or JSON. Field meanings are on the data page.
Data for West Grove 1 SE 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).