Spring Grove Weather Records (USC00368379)

Record envelope, standing records and threshold days for Spring Grove (USC00368379), Pennsylvania, United States, with 95 years of record.

Key Facts for Spring Grove

Spring Grove (USC00368379) is a weather station in Pennsylvania, United States at 39.87 latitude and -76.86 longitude, 137 m (450 ft) above sea level.
The station reports from 1932 to 2026, 95 years of record.
1,464 records set at Spring Grove still stand.
Records are tracked for prcp, snow, snwd: an element needs 30 years of data to be eligible.
Spring Grove set a daily record snowfall of 2.8 cm (1.1 in) on 3 December 2025.

About the Station

Location: Pennsylvania, United States, 39.87 latitude, -76.86 longitude.
Elevation: 137 m (450 ft).
Period of record: 1932 to 2026, 95 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 Spring Grove. 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 Spring Grove, with 2026 drawn through them
Month	Highest record high	Lowest record low	2026 highest maximum	2026 lowest minimum
Jan	17.8 C (64.0 F)	-21.7 C (-7.1 F)	n/a	n/a
Feb	20.0 C (68.0 F)	-19.4 C (-2.9 F)	n/a	n/a
Mar	29.4 C (84.9 F)	-15.0 C (5.0 F)	n/a	n/a
Apr	32.2 C (90.0 F)	-5.0 C (23.0 F)	n/a	n/a
May	36.7 C (98.1 F)	-1.7 C (28.9 F)	n/a	n/a
Jun	37.8 C (100.0 F)	3.3 C (37.9 F)	n/a	n/a
Jul	41.1 C (106.0 F)	6.1 C (43.0 F)	n/a	n/a
Aug	36.7 C (98.1 F)	4.4 C (39.9 F)	n/a	n/a
Sep	33.3 C (91.9 F)	-2.8 C (27.0 F)	n/a	n/a
Oct	32.2 C (90.0 F)	-3.9 C (25.0 F)	n/a	n/a
Nov	27.2 C (81.0 F)	-12.8 C (9.0 F)	n/a	n/a
Dec	18.3 C (64.9 F)	-23.3 C (-9.9 F)	n/a	n/a

Which Years Hold Standing Records

1,464 standing records

1,464 records at Spring Grove still stand. 1936 holds the most, with 121.

Standing records at Spring Grove by the year they were set
Year set	Standing records
1935	104
1936	121
1937	94
1938	106
1939	112
1940	109
1941	103
1942	112
1943	111
1944	87
1945	103
1946	86
1947	79
1948	49
1965	5
1968	11
1970	25
1976	11
1978	36

All-Time Record Progression

6 new records

6 all-time records were set at Spring Grove between 12 February 1983 and 13 January 1996. Each dot is a new record.

When Spring Grove set new all-time records
Date	Kind	Detail
1983-02-12	Record daily snowfall	Record daily snowfall 59.7 cm (23.5 in)
1996-01-08	Record daily snowfall	Record daily snowfall 66.0 cm (26.0 in)
1996-01-08	Record snow depth	Record snow depth 78.7 cm (31.0 in)
1996-01-09	Record snow depth	Record snow depth 88.9 cm (35.0 in)
1996-01-10	Record snow depth	Record snow depth 91.4 cm (36.0 in)
1996-01-13	Record snow depth	Record snow depth 109.2 cm (43.0 in)

Wettest Day of Each Month

Aug: 142.0 mm (5.6 in)

The wettest day on record for each calendar month at Spring Grove. The most was 142.0 mm (5.6 in) on 13 August 1955.

Record daily precipitation for each month at Spring Grove
Month	Record daily precipitation (mm)	Date
Jan	65.3 mm (2.6 in)	1 January 1948
Feb	58.9 mm (2.3 in)	17 February 2003
Mar	79.0 mm (3.1 in)	20 March 1958
Apr	68.6 mm (2.7 in)	20 April 1940
May	93.2 mm (3.7 in)	26 May 1995
Jun	94.0 mm (3.7 in)	2 June 2007
Jul	137.2 mm (5.4 in)	13 July 2010
Aug	142.0 mm (5.6 in)	13 August 1955
Sep	138.4 mm (5.4 in)	2 September 2021
Oct	132.1 mm (5.2 in)	30 October 2012
Nov	84.6 mm (3.3 in)	28 November 1993
Dec	78.7 mm (3.1 in)	5 December 1993

Period of Record Coverage

1935 to 1978

19 years of record at Spring Grove, 1935 to 1978. 19 years have data for under 90 percent of days and are left out of rankings: 1935, 1936, 1937, 1938, 1939, 1940, 1941, 1942 and others.

Days with data per year at Spring Grove
Year	Days with data	Share of year	Complete
1935	209	57%	No
1936	255	70%	No
1937	254	70%	No
1938	254	70%	No
1939	237	65%	No
1940	235	64%	No
1941	257	70%	No
1942	268	73%	No
1943	251	69%	No
1944	279	76%	No
1945	282	77%	No
1946	243	67%	No
1947	258	71%	No
1948	84	23%	No
1965	22	6%	No
1968	53	14%	No
1970	90	25%	No
1976	60	16%	No
1978	91	25%	No

Latest Records

Latest records at Spring Grove
Date	Station	Record	Value	Beat old record by	Old record stood	Significance
3 December 2025	Spring Grove, US	daily snowfall	2.8 cm (1.1 in)	2.0 cm (0.8 in)	72 years	20 of 100 (Routine)
14 May 2025	Spring Grove, US	daily rain	30.5 mm (1.2 in)	3.3 mm (0.13 in)	23 years	18 of 100 (Routine)
1 April 2025	Spring Grove, US	daily rain	31.8 mm (1.3 in)	4.6 mm (0.18 in)	8 years	15 of 100 (Routine)
9 August 2024	Spring Grove, US	daily rain	40.6 mm (1.6 in)	11.4 mm (0.4 in)	43 years	29 of 100 (Routine)
7 August 2024	Spring Grove, US	daily rain	77.2 mm (3.0 in)	31.5 mm (1.2 in)	40 years	44 of 100 (Notable)
2 April 2024	Spring Grove, US	daily rain	28.2 mm (1.1 in)	2.8 mm (0.11 in)	54 years	27 of 100 (Routine)
10 January 2024	Spring Grove, US	daily rain	40.6 mm (1.6 in)	15.5 mm (0.6 in)	60 years	43 of 100 (Notable)
18 December 2023	Spring Grove, US	daily rain	64.3 mm (2.5 in)	41.4 mm (1.6 in)	45 years	61 of 100 (Major)
22 November 2023	Spring Grove, US	daily rain	49.0 mm (1.9 in)	4.3 mm (0.17 in)	70 years	33 of 100 (Routine)
29 April 2023	Spring Grove, US	daily rain	37.3 mm (1.5 in)	14.2 mm (0.6 in)	88 years	49 of 100 (Notable)
23 April 2023	Spring Grove, US	daily rain	42.4 mm (1.7 in)	4.8 mm (0.19 in)	10 years	16 of 100 (Routine)
4 March 2023	Spring Grove, US	daily rain	29.0 mm (1.1 in)	4.6 mm (0.18 in)	52 years	28 of 100 (Routine)
16 December 2022	Spring Grove, US	daily rain	43.4 mm (1.7 in)	6.6 mm (0.26 in)	4 years	16 of 100 (Routine)
6 July 2022	Spring Grove, US	daily rain	35.1 mm (1.4 in)	1.8 mm (0.07 in)	16 years	15 of 100 (Routine)
7 May 2022	Spring Grove, US	daily rain	63.5 mm (2.5 in)	37.1 mm (1.5 in)	5 years	45 of 100 (Notable)
13 March 2022	Spring Grove, US	daily snow depth	12.7 cm (5.0 in)	2.5 cm (1.0 in)	61 years	29 of 100 (Routine)
13 March 2022	Spring Grove, US	daily snowfall	13.2 cm (5.2 in)	3.0 cm (1.2 in)	28 years	20 of 100 (Routine)
7 January 2022	Spring Grove, US	daily snowfall	13.0 cm (5.1 in)	0.3 cm (0.1 in)	26 years	15 of 100 (Routine)
2 September 2021	Spring Grove, US	monthly rain	138.4 mm (5.4 in)	6.6 mm (0.26 in)	45 years	35 of 100 (Notable)
18 August 2021	Spring Grove, US	daily rain	44.5 mm (1.8 in)	5.9 mm (0.23 in)	62 years	31 of 100 (Routine)

Extremes by Year

1932 to 2026

Yearly extremes at Spring Grove: the record and the median year
Measure	Record	Year of the record	Median year	Years with a value
Hottest day (TXx)	41.1 C (106.0 F)	1936	35.0 C (95.0 F)	19
Coldest night (TNn)	-23.3 C (-9.9 F)	1942	-16.1 C (3.0 F)	19
Wettest day (Rx1day)	142.0 mm (5.6 in)	1955	61.7 mm (2.4 in)	95
Wettest five days (Rx5day)	294.6 mm (11.6 in)	2018	88.6 mm (3.5 in)	95
Longest dry spell (CDD)	40 days	1953	17 days	95

Hottest day (TXx)

The hottest day of the year at Spring Grove, 1932 to 2026. The record is 41.1 C (106.0 F) in 1936, marked on the chart; the median year is 35.0 C (95.0 F).

Hottest day (TXx) at Spring Grove by year
Year	Hottest day (TXx)
1932	n/a
1933	n/a
1934	n/a
1935	36.7 C (98.1 F)
1936	41.1 C (106.0 F)
1937	37.2 C (99.0 F)
1938	35.0 C (95.0 F)
1939	34.4 C (93.9 F)
1940	36.1 C (97.0 F)
1941	36.7 C (98.1 F)
1942	36.1 C (97.0 F)
1943	33.9 C (93.0 F)
1944	35.6 C (96.1 F)
1945	36.1 C (97.0 F)
1946	32.8 C (91.0 F)
1947	34.4 C (93.9 F)
1948	25.0 C (77.0 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	23.3 C (73.9 F)
1966	n/a
1967	n/a
1968	35.0 C (95.0 F)
1969	n/a
1970	34.4 C (93.9 F)
1971	n/a
1972	n/a
1973	n/a
1974	n/a
1975	n/a
1976	35.0 C (95.0 F)
1977	n/a
1978	37.8 C (100.0 F)
1979	n/a
1980	n/a
1981	n/a
1982	n/a
1983	n/a
1984	n/a
1985	n/a
1986	n/a
1987	n/a
1988	n/a
1989	n/a
1990	n/a
1991	n/a
1992	n/a
1993	n/a
1994	n/a
1995	n/a
1996	n/a
1997	n/a
1998	n/a
1999	n/a
2000	n/a
2001	n/a
2002	n/a
2003	n/a
2004	n/a
2005	n/a
2006	n/a
2007	n/a
2008	n/a
2009	n/a
2010	n/a
2011	n/a
2012	n/a
2013	n/a
2014	n/a
2015	n/a
2016	n/a
2017	n/a
2018	n/a
2019	n/a
2020	n/a
2021	n/a
2022	n/a
2023	n/a
2024	n/a
2025	n/a
2026	n/a

Coldest night (TNn)

The coldest night of the year at Spring Grove, 1932 to 2026. The record is -23.3 C (-9.9 F) in 1942, marked on the chart; the median year is -16.1 C (3.0 F).

Coldest night (TNn) at Spring Grove by year
Year	Coldest night (TNn)
1932	n/a
1933	n/a
1934	n/a
1935	-12.2 C (10.0 F)
1936	-19.4 C (-2.9 F)
1937	-10.6 C (12.9 F)
1938	-12.8 C (9.0 F)
1939	-12.8 C (9.0 F)
1940	-16.7 C (1.9 F)
1941	-16.7 C (1.9 F)
1942	-23.3 C (-9.9 F)
1943	-16.7 C (1.9 F)
1944	-17.2 C (1.0 F)
1945	-19.4 C (-2.9 F)
1946	-16.1 C (3.0 F)
1947	-16.1 C (3.0 F)
1948	-21.7 C (-7.1 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	-3.9 C (25.0 F)
1966	n/a
1967	n/a
1968	10.6 C (51.1 F)
1969	n/a
1970	-1.7 C (28.9 F)
1971	n/a
1972	n/a
1973	n/a
1974	n/a
1975	n/a
1976	0.6 C (33.1 F)
1977	n/a
1978	-3.3 C (26.1 F)
1979	n/a
1980	n/a
1981	n/a
1982	n/a
1983	n/a
1984	n/a
1985	n/a
1986	n/a
1987	n/a
1988	n/a
1989	n/a
1990	n/a
1991	n/a
1992	n/a
1993	n/a
1994	n/a
1995	n/a
1996	n/a
1997	n/a
1998	n/a
1999	n/a
2000	n/a
2001	n/a
2002	n/a
2003	n/a
2004	n/a
2005	n/a
2006	n/a
2007	n/a
2008	n/a
2009	n/a
2010	n/a
2011	n/a
2012	n/a
2013	n/a
2014	n/a
2015	n/a
2016	n/a
2017	n/a
2018	n/a
2019	n/a
2020	n/a
2021	n/a
2022	n/a
2023	n/a
2024	n/a
2025	n/a
2026	n/a

Wettest day (Rx1day)

The wettest day of the year at Spring Grove, 1932 to 2026. The record is 142.0 mm (5.6 in) in 1955, marked on the chart; the median year is 61.7 mm (2.4 in).

Wettest day (Rx1day) at Spring Grove by year
Year	Wettest day (Rx1day)
1932	61.7 mm (2.4 in)
1933	63.5 mm (2.5 in)
1934	82.6 mm (3.3 in)
1935	45.5 mm (1.8 in)
1936	41.9 mm (1.6 in)
1937	77.7 mm (3.1 in)
1938	64.3 mm (2.5 in)
1939	55.9 mm (2.2 in)
1940	102.9 mm (4.1 in)
1941	47.5 mm (1.9 in)
1942	61.7 mm (2.4 in)
1943	78.0 mm (3.1 in)
1944	47.0 mm (1.9 in)
1945	80.8 mm (3.2 in)
1946	88.1 mm (3.5 in)
1947	44.2 mm (1.7 in)
1948	65.3 mm (2.6 in)
1949	47.2 mm (1.9 in)
1950	64.8 mm (2.6 in)
1951	46.0 mm (1.8 in)
1952	67.3 mm (2.6 in)
1953	59.4 mm (2.3 in)
1954	38.9 mm (1.5 in)
1955	142.0 mm (5.6 in)
1956	52.3 mm (2.1 in)
1957	43.2 mm (1.7 in)
1958	79.0 mm (3.1 in)
1959	48.3 mm (1.9 in)
1960	70.4 mm (2.8 in)
1961	51.1 mm (2.0 in)
1962	93.0 mm (3.7 in)
1963	59.4 mm (2.3 in)
1964	55.4 mm (2.2 in)
1965	44.5 mm (1.8 in)
1966	65.0 mm (2.6 in)
1967	57.7 mm (2.3 in)
1968	115.6 mm (4.6 in)
1969	43.9 mm (1.7 in)
1970	67.8 mm (2.7 in)
1971	65.0 mm (2.6 in)
1972	41.4 mm (1.6 in)
1973	58.4 mm (2.3 in)
1974	35.6 mm (1.4 in)
1975	131.8 mm (5.2 in)
1976	48.8 mm (1.9 in)
1977	56.4 mm (2.2 in)
1978	60.2 mm (2.4 in)
1979	87.1 mm (3.4 in)
1980	46.0 mm (1.8 in)
1981	37.3 mm (1.5 in)
1982	47.8 mm (1.9 in)
1983	55.4 mm (2.2 in)
1984	62.0 mm (2.4 in)
1985	62.5 mm (2.5 in)
1986	57.2 mm (2.3 in)
1987	54.6 mm (2.1 in)
1988	52.8 mm (2.1 in)
1989	52.1 mm (2.1 in)
1990	48.5 mm (1.9 in)
1991	42.9 mm (1.7 in)
1992	57.7 mm (2.3 in)
1993	84.6 mm (3.3 in)
1994	50.3 mm (2.0 in)
1995	93.2 mm (3.7 in)
1996	72.6 mm (2.9 in)
1997	59.9 mm (2.4 in)
1998	74.9 mm (2.9 in)
1999	64.8 mm (2.6 in)
2000	66.3 mm (2.6 in)
2001	55.4 mm (2.2 in)
2002	61.0 mm (2.4 in)
2003	76.7 mm (3.0 in)
2004	112.8 mm (4.4 in)
2005	89.7 mm (3.5 in)
2006	57.2 mm (2.3 in)
2007	94.0 mm (3.7 in)
2008	96.5 mm (3.8 in)
2009	45.2 mm (1.8 in)
2010	137.2 mm (5.4 in)
2011	104.9 mm (4.1 in)
2012	132.1 mm (5.2 in)
2013	108.0 mm (4.3 in)
2014	75.7 mm (3.0 in)
2015	84.8 mm (3.3 in)
2016	54.1 mm (2.1 in)
2017	50.8 mm (2.0 in)
2018	79.8 mm (3.1 in)
2019	78.7 mm (3.1 in)
2020	68.1 mm (2.7 in)
2021	138.4 mm (5.4 in)
2022	63.5 mm (2.5 in)
2023	64.3 mm (2.5 in)
2024	77.2 mm (3.0 in)
2025	39.9 mm (1.6 in)
2026	27.2 mm (1.1 in)

Wettest five days (Rx5day)

The wettest five days of the year at Spring Grove, 1932 to 2026. The record is 294.6 mm (11.6 in) in 2018, marked on the chart; the median year is 88.6 mm (3.5 in).

Wettest five days (Rx5day) at Spring Grove by year
Year	Wettest five days (Rx5day)
1932	81.5 mm (3.2 in)
1933	89.1 mm (3.5 in)
1934	107.9 mm (4.2 in)
1935	56.1 mm (2.2 in)
1936	78.4 mm (3.1 in)
1937	150.4 mm (5.9 in)
1938	76.7 mm (3.0 in)
1939	122.0 mm (4.8 in)
1940	108.5 mm (4.3 in)
1941	70.6 mm (2.8 in)
1942	102.6 mm (4.0 in)
1943	131.8 mm (5.2 in)
1944	77.7 mm (3.1 in)
1945	162.5 mm (6.4 in)
1946	93.5 mm (3.7 in)
1947	104.1 mm (4.1 in)
1948	76.3 mm (3.0 in)
1949	57.8 mm (2.3 in)
1950	75.9 mm (3.0 in)
1951	91.4 mm (3.6 in)
1952	143.8 mm (5.7 in)
1953	80.0 mm (3.1 in)
1954	75.8 mm (3.0 in)
1955	162.6 mm (6.4 in)
1956	69.8 mm (2.7 in)
1957	72.2 mm (2.8 in)
1958	100.4 mm (4.0 in)
1959	78.8 mm (3.1 in)
1960	86.1 mm (3.4 in)
1961	89.2 mm (3.5 in)
1962	99.1 mm (3.9 in)
1963	78.7 mm (3.1 in)
1964	72.0 mm (2.8 in)
1965	68.4 mm (2.7 in)
1966	112.0 mm (4.4 in)
1967	115.6 mm (4.6 in)
1968	117.9 mm (4.6 in)
1969	112.6 mm (4.4 in)
1970	82.5 mm (3.2 in)
1971	111.0 mm (4.4 in)
1972	65.8 mm (2.6 in)
1973	83.3 mm (3.3 in)
1974	58.2 mm (2.3 in)
1975	270.6 mm (10.7 in)
1976	68.6 mm (2.7 in)
1977	83.8 mm (3.3 in)
1978	81.3 mm (3.2 in)
1979	98.3 mm (3.9 in)
1980	63.8 mm (2.5 in)
1981	88.6 mm (3.5 in)
1982	84.6 mm (3.3 in)
1983	76.7 mm (3.0 in)
1984	75.0 mm (3.0 in)
1985	93.7 mm (3.7 in)
1986	92.3 mm (3.6 in)
1987	74.2 mm (2.9 in)
1988	73.9 mm (2.9 in)
1989	93.3 mm (3.7 in)
1990	86.1 mm (3.4 in)
1991	55.3 mm (2.2 in)
1992	74.0 mm (2.9 in)
1993	87.1 mm (3.4 in)
1994	62.5 mm (2.5 in)
1995	106.2 mm (4.2 in)
1996	83.1 mm (3.3 in)
1997	75.9 mm (3.0 in)
1998	82.3 mm (3.2 in)
1999	123.0 mm (4.8 in)
2000	84.4 mm (3.3 in)
2001	96.0 mm (3.8 in)
2002	69.4 mm (2.7 in)
2003	113.1 mm (4.5 in)
2004	117.9 mm (4.6 in)
2005	141.5 mm (5.6 in)
2006	113.1 mm (4.5 in)
2007	105.2 mm (4.1 in)
2008	120.4 mm (4.7 in)
2009	82.1 mm (3.2 in)
2010	171.2 mm (6.7 in)
2011	263.9 mm (10.4 in)
2012	157.0 mm (6.2 in)
2013	203.2 mm (8.0 in)
2014	103.7 mm (4.1 in)
2015	93.7 mm (3.7 in)
2016	88.5 mm (3.5 in)
2017	61.5 mm (2.4 in)
2018	294.6 mm (11.6 in)
2019	112.3 mm (4.4 in)
2020	108.7 mm (4.3 in)
2021	161.0 mm (6.3 in)
2022	94.6 mm (3.7 in)
2023	71.4 mm (2.8 in)
2024	144.0 mm (5.7 in)
2025	65.9 mm (2.6 in)
2026	59.0 mm (2.3 in)

Longest dry spell (CDD)

The longest dry spell of the year at Spring Grove, 1932 to 2026. The record is 40 days in 1953, marked on the chart; the median year is 17 days.

Longest dry spell (CDD) at Spring Grove by year
Year	Longest dry spell (CDD)
1932	21 days
1933	15 days
1934	17 days
1935	10 days
1936	14 days
1937	10 days
1938	14 days
1939	17 days
1940	12 days
1941	29 days
1942	12 days
1943	21 days
1944	18 days
1945	15 days
1946	16 days
1947	35 days
1948	17 days
1949	15 days
1950	16 days
1951	13 days
1952	16 days
1953	40 days
1954	20 days
1955	22 days
1956	15 days
1957	17 days
1958	25 days
1959	35 days
1960	13 days
1961	15 days
1962	16 days
1963	32 days
1964	27 days
1965	14 days
1966	30 days
1967	16 days
1968	26 days
1969	17 days
1970	16 days
1971	22 days
1972	17 days
1973	25 days
1974	18 days
1975	14 days
1976	24 days
1977	21 days
1978	16 days
1979	15 days
1980	22 days
1981	16 days
1982	23 days
1983	20 days
1984	16 days
1985	14 days
1986	19 days
1987	21 days
1988	22 days
1989	17 days
1990	13 days
1991	23 days
1992	17 days
1993	12 days
1994	16 days
1995	32 days
1996	13 days
1997	16 days
1998	31 days
1999	17 days
2000	21 days
2001	33 days
2002	19 days
2003	13 days
2004	17 days
2005	29 days
2006	21 days
2007	25 days
2008	23 days
2009	15 days
2010	20 days
2011	15 days
2012	16 days
2013	20 days
2014	11 days
2015	20 days
2016	18 days
2017	21 days
2018	12 days
2019	16 days
2020	14 days
2021	18 days
2022	12 days
2023	26 days
2024	34 days
2025	16 days
2026	20 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

85 years, 1938 to 2025

A day with at least 62.1 mm (2.4 in) of rain is expected about once in 2 years. A day with at least 164.8 mm (6.5 in) of rain is expected about once in 100 years.

Rainfall return levels at Spring Grove: the daily rain expected about once in a given number of years
Expected about once in	A day with at least	Note
2 years	62.1 mm (2.4 in)
5 years	83.0 mm (3.3 in)
10 years	99.2 mm (3.9 in)
25 years	122.7 mm (4.8 in)
50 years	142.6 mm (5.6 in)
100 years	164.8 mm (6.5 in)	Longer than the 85 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, 85 years of values from 1938 to 2025.

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: 142.0 mm (5.6 in) in 1955; 138.4 mm (5.4 in) in 2021; 137.2 mm (5.4 in) in 2010.

Download the Data

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