Greensburg 3 SE Unity Weather Records (USC00363516)

Record envelope, standing records and threshold days for Greensburg 3 SE Unity (USC00363516), Pennsylvania, United States, with 52 years of record.

Key Facts for Greensburg 3 SE Unity

Greensburg 3 SE Unity (USC00363516) is a weather station in Pennsylvania, United States at 40.28 latitude and -79.50 longitude, 378 m (1,240 ft) above sea level.
The station reports from 1908 to 1959, 52 years of record.
1,464 records set at Greensburg 3 SE Unity still stand.
Records are tracked for prcp, snow: an element needs 30 years of data to be eligible.
Greensburg 3 SE Unity set a daily record precipitation of 27.9 mm (1.1 in) on 27 April 1959.

About the Station

Location: Pennsylvania, United States, 40.28 latitude, -79.50 longitude.
Elevation: 378 m (1,240 ft).
Period of record: 1908 to 1959, 52 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 Greensburg 3 SE Unity. 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 Greensburg 3 SE Unity, with 2026 drawn through them
Month	Highest record high	Lowest record low	2026 highest maximum	2026 lowest minimum
Jan	23.9 C (75.0 F)	-29.4 C (-20.9 F)	n/a	n/a
Feb	22.8 C (73.0 F)	-26.7 C (-16.1 F)	n/a	n/a
Mar	28.3 C (82.9 F)	-20.0 C (-4.0 F)	n/a	n/a
Apr	31.7 C (89.1 F)	-12.2 C (10.0 F)	n/a	n/a
May	33.9 C (93.0 F)	-4.4 C (24.1 F)	n/a	n/a
Jun	34.4 C (93.9 F)	1.1 C (34.0 F)	n/a	n/a
Jul	39.4 C (102.9 F)	4.4 C (39.9 F)	n/a	n/a
Aug	37.8 C (100.0 F)	3.9 C (39.0 F)	n/a	n/a
Sep	35.6 C (96.1 F)	-5.0 C (23.0 F)	n/a	n/a
Oct	31.1 C (88.0 F)	-7.2 C (19.0 F)	n/a	n/a
Nov	27.2 C (81.0 F)	-14.4 C (6.1 F)	n/a	n/a
Dec	21.7 C (71.1 F)	-28.3 C (-18.9 F)	n/a	n/a

Which Years Hold Standing Records

1,464 standing records

1,464 records at Greensburg 3 SE Unity still stand. 1936 holds the most, with 97.

Standing records at Greensburg 3 SE Unity by the year they were set
Year set	Standing records
1908	18
1909	37
1910	66
1911	76
1912	52
1913	70
1914	80
1915	49
1916	66
1917	60
1918	77
1919	59
1920	39
1921	42
1922	43
1923	39
1924	51
1925	48
1934	43
1935	52
1936	97
1937	58
1938	37
1939	44
1940	57
1941	48
1942	52
1943	4

All-Time Record Progression

1 new records

1 all-time records were set at Greensburg 3 SE Unity between 15 October 1954 and 15 October 1954. Each dot is a new record.

Wettest Day of Each Month

Oct: 111.0 mm (4.4 in)

The wettest day on record for each calendar month at Greensburg 3 SE Unity. The most was 111.0 mm (4.4 in) on 15 October 1954.

Record daily precipitation for each month at Greensburg 3 SE Unity
Month	Record daily precipitation (mm)	Date
Jan	46.5 mm (1.8 in)	3 January 1944
Feb	40.6 mm (1.6 in)	20 February 1927
Mar	67.1 mm (2.6 in)	21 March 1912
Apr	58.7 mm (2.3 in)	9 April 1942
May	48.5 mm (1.9 in)	13 May 1937
Jun	92.2 mm (3.6 in)	16 June 1912
Jul	79.0 mm (3.1 in)	31 July 1958
Aug	84.6 mm (3.3 in)	23 August 1924
Sep	87.6 mm (3.4 in)	15 September 1911
Oct	111.0 mm (4.4 in)	15 October 1954
Nov	56.9 mm (2.2 in)	16 November 1955
Dec	38.1 mm (1.5 in)	15 December 1948

Period of Record Coverage

1908 to 1943

28 years of record at Greensburg 3 SE Unity, 1908 to 1943. 9 years have data for under 90 percent of days and are left out of rankings: 1908, 1909, 1914, 1915, 1916, 1917, 1925, 1934 and others.

Days with data per year at Greensburg 3 SE Unity
Year	Days with data	Share of year	Complete
1908	60	16%	No
1909	182	50%	No
1910	360	99%	Yes
1911	360	99%	Yes
1912	364	99%	Yes
1913	330	90%	Yes
1914	286	78%	No
1915	273	75%	No
1916	313	86%	No
1917	319	87%	No
1918	360	99%	Yes
1919	361	99%	Yes
1920	334	91%	Yes
1921	331	91%	Yes
1922	364	100%	Yes
1923	364	100%	Yes
1924	366	100%	Yes
1925	242	66%	No
1934	308	84%	No
1935	347	95%	Yes
1936	363	99%	Yes
1937	360	99%	Yes
1938	358	98%	Yes
1939	354	97%	Yes
1940	353	96%	Yes
1941	361	99%	Yes
1942	365	100%	Yes
1943	31	8%	No

Latest Records

Latest records at Greensburg 3 SE Unity
Date	Station	Record	Value	Beat old record by	Old record stood	Significance
27 April 1959	Greensburg 3 SE Unity, US	daily rain	27.9 mm (1.1 in)	8.6 mm (0.34 in)	45 years	28 of 100 (Routine)
13 March 1959	Greensburg 3 SE Unity, US	daily snowfall (Tie)	5.1 cm (2.0 in)	tie	22 years	2 of 100 (Routine)
12 March 1959	Greensburg 3 SE Unity, US	daily snowfall	7.6 cm (3.0 in)	1.8 cm (0.7 in)	17 years	13 of 100 (Routine)
21 December 1958	Greensburg 3 SE Unity, US	daily snowfall	5.1 cm (2.0 in)	2.6 cm (1.0 in)	48 years	24 of 100 (Routine)
9 December 1958	Greensburg 3 SE Unity, US	daily snowfall	12.7 cm (5.0 in)	6.3 cm (2.5 in)	3 years	18 of 100 (Routine)
28 November 1958	Greensburg 3 SE Unity, US	daily snowfall	15.2 cm (6.0 in)	10.1 cm (4.0 in)	3 years	30 of 100 (Routine)
31 July 1958	Greensburg 3 SE Unity, US	monthly rain	79.0 mm (3.1 in)	15.5 mm (0.6 in)	5 years	29 of 100 (Routine)
6 July 1958	Greensburg 3 SE Unity, US	daily rain	17.3 mm (0.7 in)	7.9 mm (0.31 in)	25 years	18 of 100 (Routine)
20 June 1958	Greensburg 3 SE Unity, US	daily rain	34.5 mm (1.4 in)	27.1 mm (1.1 in)	44 years	39 of 100 (Notable)
4 May 1958	Greensburg 3 SE Unity, US	daily rain	24.1 mm (0.9 in)	4.3 mm (0.17 in)	36 years	20 of 100 (Routine)
14 March 1958	Greensburg 3 SE Unity, US	daily snowfall	11.2 cm (4.4 in)	1.0 cm (0.4 in)	20 years	13 of 100 (Routine)
13 March 1958	Greensburg 3 SE Unity, US	daily snowfall (Tie)	5.1 cm (2.0 in)	tie	21 years	2 of 100 (Routine)
7 February 1958	Greensburg 3 SE Unity, US	daily snowfall	15.2 cm (6.0 in)	5.0 cm (2.0 in)	16 years	17 of 100 (Routine)
3 February 1958	Greensburg 3 SE Unity, US	daily snowfall	15.2 cm (6.0 in)	7.6 cm (3.0 in)	32 years	27 of 100 (Routine)
25 January 1958	Greensburg 3 SE Unity, US	daily snowfall	5.1 cm (2.0 in)	0.5 cm (0.2 in)	44 years	19 of 100 (Routine)
25 January 1958	Greensburg 3 SE Unity, US	daily rain	17.5 mm (0.7 in)	2.3 mm (0.09 in)	20 years	14 of 100 (Routine)
14 January 1958	Greensburg 3 SE Unity, US	daily rain	35.1 mm (1.4 in)	9.7 mm (0.38 in)	48 years	33 of 100 (Routine)
4 December 1957	Greensburg 3 SE Unity, US	daily snowfall (Tie)	8.9 cm (3.5 in)	tie	36 years	3 of 100 (Routine)
27 October 1957	Greensburg 3 SE Unity, US	daily snowfall	2.5 cm (1.0 in)	2.5 cm (1.0 in)	43 years	20 of 100 (Routine)
16 September 1957	Greensburg 3 SE Unity, US	daily rain	25.7 mm (1.0 in)	6.6 mm (0.26 in)	23 years	17 of 100 (Routine)

Climate Trend

13 complete years, 1910 to 1942

One stripe for each of 13 complete years at Greensburg 3 SE Unity, 1910 to 1942. 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 1912, at 9.8 C (49.6 F), and the warmest was 1911, at 11.4 C (52.5 F). The strongest colour marks a difference of 0.9 C (1.6 F).

Annual mean temperature at Greensburg 3 SE Unity as warming stripes, 1910 to 1942
Year	Annual mean temperature	Difference from the station mean
1910	10.1 C	-0.38 C
1911	11.4 C	+0.88 C
1912	9.8 C	-0.74 C
1913	11.0 C	+0.49 C
1918	11.0 C	+0.43 C
1919	10.7 C	+0.18 C
1935	10.8 C	+0.28 C
1936	10.2 C	-0.31 C
1937	10.1 C	-0.43 C
1938	11.0 C	+0.49 C
1939	10.7 C	+0.17 C
1941	10.1 C	-0.39 C
1942	9.9 C	-0.66 C

This station does not have enough complete years (30 are needed) to fit a temperature trend.

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

1908 to 1959

Yearly extremes at Greensburg 3 SE Unity: the record and the median year
Measure	Record	Year of the record	Median year	Years with a value
Hottest day (TXx)	39.4 C (102.9 F)	1936	33.9 C (93.0 F)	28
Coldest night (TNn)	-29.4 C (-20.9 F)	1912	-20.0 C (-4.0 F)	28
Wettest day (Rx1day)	111.0 mm (4.4 in)	1954	51.8 mm (2.0 in)	52
Wettest five days (Rx5day)	136.1 mm (5.4 in)	1951	83.7 mm (3.3 in)	52
Longest dry spell (CDD)	31 days	1924	15 days	52

Hottest day (TXx)

The hottest day of the year at Greensburg 3 SE Unity, 1908 to 1959. The record is 39.4 C (102.9 F) in 1936, marked on the chart; the median year is 33.9 C (93.0 F).

Hottest day (TXx) at Greensburg 3 SE Unity by year
Year	Hottest day (TXx)
1908	27.8 C (82.0 F)
1909	32.8 C (91.0 F)
1910	31.7 C (89.1 F)
1911	36.7 C (98.1 F)
1912	33.9 C (93.0 F)
1913	33.3 C (91.9 F)
1914	32.2 C (90.0 F)
1915	33.3 C (91.9 F)
1916	33.9 C (93.0 F)
1917	32.8 C (91.0 F)
1918	37.8 C (100.0 F)
1919	34.4 C (93.9 F)
1920	30.6 C (87.1 F)
1921	33.9 C (93.0 F)
1922	33.9 C (93.0 F)
1923	34.4 C (93.9 F)
1924	33.9 C (93.0 F)
1925	33.9 C (93.0 F)
1926	n/a
1927	n/a
1928	n/a
1929	n/a
1930	n/a
1931	n/a
1932	n/a
1933	n/a
1934	36.7 C (98.1 F)
1935	36.1 C (97.0 F)
1936	39.4 C (102.9 F)
1937	37.2 C (99.0 F)
1938	33.3 C (91.9 F)
1939	36.1 C (97.0 F)
1940	33.9 C (93.0 F)
1941	36.1 C (97.0 F)
1942	35.0 C (95.0 F)
1943	18.9 C (66.0 F)
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

Coldest night (TNn)

The coldest night of the year at Greensburg 3 SE Unity, 1908 to 1959. The record is -29.4 C (-20.9 F) in 1912, marked on the chart; the median year is -20.0 C (-4.0 F).

Coldest night (TNn) at Greensburg 3 SE Unity by year
Year	Coldest night (TNn)
1908	-11.1 C (12.0 F)
1909	-20.0 C (-4.0 F)
1910	-20.0 C (-4.0 F)
1911	-16.7 C (1.9 F)
1912	-29.4 C (-20.9 F)
1913	-18.9 C (-2.0 F)
1914	-25.6 C (-14.1 F)
1915	-20.0 C (-4.0 F)
1916	-26.1 C (-15.0 F)
1917	-28.3 C (-18.9 F)
1918	-26.7 C (-16.1 F)
1919	-20.0 C (-4.0 F)
1920	-20.6 C (-5.1 F)
1921	-16.1 C (3.0 F)
1922	-22.2 C (-8.0 F)
1923	-10.0 C (14.0 F)
1924	-20.0 C (-4.0 F)
1925	-23.3 C (-9.9 F)
1926	n/a
1927	n/a
1928	n/a
1929	n/a
1930	n/a
1931	n/a
1932	n/a
1933	n/a
1934	-20.0 C (-4.0 F)
1935	-20.0 C (-4.0 F)
1936	-28.3 C (-18.9 F)
1937	-18.3 C (-0.9 F)
1938	-18.9 C (-2.0 F)
1939	-17.8 C (0.0 F)
1940	-23.3 C (-9.9 F)
1941	-18.3 C (-0.9 F)
1942	-28.9 C (-20.0 F)
1943	-17.2 C (1.0 F)
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

Wettest day (Rx1day)

The wettest day of the year at Greensburg 3 SE Unity, 1908 to 1959. The record is 111.0 mm (4.4 in) in 1954, marked on the chart; the median year is 51.8 mm (2.0 in).

Wettest day (Rx1day) at Greensburg 3 SE Unity by year
Year	Wettest day (Rx1day)
1908	11.9 mm (0.5 in)
1909	36.8 mm (1.4 in)
1910	38.6 mm (1.5 in)
1911	87.6 mm (3.4 in)
1912	92.2 mm (3.6 in)
1913	54.4 mm (2.1 in)
1914	45.5 mm (1.8 in)
1915	43.4 mm (1.7 in)
1916	43.7 mm (1.7 in)
1917	46.2 mm (1.8 in)
1918	43.7 mm (1.7 in)
1919	62.7 mm (2.5 in)
1920	50.8 mm (2.0 in)
1921	61.7 mm (2.4 in)
1922	27.7 mm (1.1 in)
1923	38.1 mm (1.5 in)
1924	90.2 mm (3.6 in)
1925	41.4 mm (1.6 in)
1926	46.2 mm (1.8 in)
1927	74.9 mm (2.9 in)
1928	48.3 mm (1.9 in)
1929	63.5 mm (2.5 in)
1930	64.8 mm (2.6 in)
1931	45.0 mm (1.8 in)
1932	38.1 mm (1.5 in)
1933	38.1 mm (1.5 in)
1934	47.8 mm (1.9 in)
1935	38.9 mm (1.5 in)
1936	68.8 mm (2.7 in)
1937	48.5 mm (1.9 in)
1938	31.2 mm (1.2 in)
1939	54.4 mm (2.1 in)
1940	42.4 mm (1.7 in)
1941	65.0 mm (2.6 in)
1942	58.7 mm (2.3 in)
1943	52.1 mm (2.1 in)
1944	52.8 mm (2.1 in)
1945	54.6 mm (2.1 in)
1946	50.8 mm (2.0 in)
1947	62.2 mm (2.4 in)
1948	63.2 mm (2.5 in)
1949	51.8 mm (2.0 in)
1950	53.3 mm (2.1 in)
1951	57.9 mm (2.3 in)
1952	51.8 mm (2.0 in)
1953	63.5 mm (2.5 in)
1954	111.0 mm (4.4 in)
1955	61.5 mm (2.4 in)
1956	69.1 mm (2.7 in)
1957	32.8 mm (1.3 in)
1958	79.0 mm (3.1 in)
1959	27.9 mm (1.1 in)

Wettest five days (Rx5day)

The wettest five days of the year at Greensburg 3 SE Unity, 1908 to 1959. The record is 136.1 mm (5.4 in) in 1951, marked on the chart; the median year is 83.7 mm (3.3 in).

Wettest five days (Rx5day) at Greensburg 3 SE Unity by year
Year	Wettest five days (Rx5day)
1908	18.5 mm (0.7 in)
1909	41.4 mm (1.6 in)
1910	74.1 mm (2.9 in)
1911	115.8 mm (4.6 in)
1912	110.2 mm (4.3 in)
1913	72.9 mm (2.9 in)
1914	65.8 mm (2.6 in)
1915	65.3 mm (2.6 in)
1916	69.4 mm (2.7 in)
1917	55.1 mm (2.2 in)
1918	115.6 mm (4.6 in)
1919	78.0 mm (3.1 in)
1920	92.7 mm (3.6 in)
1921	127.7 mm (5.0 in)
1922	59.2 mm (2.3 in)
1923	81.0 mm (3.2 in)
1924	99.1 mm (3.9 in)
1925	59.4 mm (2.3 in)
1926	115.8 mm (4.6 in)
1927	105.9 mm (4.2 in)
1928	76.3 mm (3.0 in)
1929	84.1 mm (3.3 in)
1930	70.4 mm (2.8 in)
1931	67.1 mm (2.6 in)
1932	54.3 mm (2.1 in)
1933	76.4 mm (3.0 in)
1934	83.3 mm (3.3 in)
1935	48.8 mm (1.9 in)
1936	120.5 mm (4.7 in)
1937	94.2 mm (3.7 in)
1938	87.9 mm (3.5 in)
1939	93.9 mm (3.7 in)
1940	78.0 mm (3.1 in)
1941	113.3 mm (4.5 in)
1942	84.0 mm (3.3 in)
1943	89.3 mm (3.5 in)
1944	71.8 mm (2.8 in)
1945	73.8 mm (2.9 in)
1946	63.3 mm (2.5 in)
1947	106.2 mm (4.2 in)
1948	114.0 mm (4.5 in)
1949	71.6 mm (2.8 in)
1950	113.5 mm (4.5 in)
1951	136.1 mm (5.4 in)
1952	115.5 mm (4.5 in)
1953	95.5 mm (3.8 in)
1954	129.6 mm (5.1 in)
1955	88.5 mm (3.5 in)
1956	85.6 mm (3.4 in)
1957	59.4 mm (2.3 in)
1958	110.2 mm (4.3 in)
1959	62.0 mm (2.4 in)

Longest dry spell (CDD)

The longest dry spell of the year at Greensburg 3 SE Unity, 1908 to 1959. The record is 31 days in 1924, marked on the chart; the median year is 15 days.

Longest dry spell (CDD) at Greensburg 3 SE Unity by year
Year	Longest dry spell (CDD)
1908	15 days
1909	15 days
1910	14 days
1911	16 days
1912	15 days
1913	11 days
1914	19 days
1915	11 days
1916	9 days
1917	22 days
1918	20 days
1919	12 days
1920	25 days
1921	12 days
1922	24 days
1923	16 days
1924	31 days
1925	13 days
1926	13 days
1927	12 days
1928	8 days
1929	14 days
1930	17 days
1931	13 days
1932	20 days
1933	12 days
1934	19 days
1935	18 days
1936	12 days
1937	11 days
1938	12 days
1939	26 days
1940	11 days
1941	17 days
1942	17 days
1943	26 days
1944	13 days
1945	13 days
1946	12 days
1947	17 days
1948	15 days
1949	12 days
1950	20 days
1951	19 days
1952	31 days
1953	24 days
1954	12 days
1955	22 days
1956	13 days
1957	16 days
1958	9 days
1959	9 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

39 years, 1910 to 1958

A day with at least 53.8 mm (2.1 in) of rain is expected about once in 2 years. A day with at least 114.6 mm (4.5 in) of rain is expected about once in 100 years.

Rainfall return levels at Greensburg 3 SE Unity: the daily rain expected about once in a given number of years
Expected about once in	A day with at least	Note
2 years	53.8 mm (2.1 in)
5 years	70.0 mm (2.8 in)
10 years	80.8 mm (3.2 in)
25 years	94.4 mm (3.7 in)
50 years	104.5 mm (4.1 in)	Longer than the 39 years of record
100 years	114.6 mm (4.5 in)	Longer than the 39 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, 39 years of values from 1910 to 1958.

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: 111.0 mm (4.4 in) in 1954; 92.2 mm (3.6 in) in 1912; 90.2 mm (3.6 in) in 1924.

Download the Data

Data for Greensburg 3 SE Unity standing records by year: CSV or JSON. Field meanings are on the data page.
Data for Greensburg 3 SE Unity 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 2026-10-15 (15 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).