Deer Park AP Weather Records (USC00452066)

Record envelope, standing records and threshold days for Deer Park AP (USC00452066), Washington, United States, with 67 years of record.

Key Facts for Deer Park AP

Deer Park AP (USC00452066) is a weather station in Washington, United States at 47.97 latitude and -117.43 longitude, 671 m (2,201 ft) above sea level.
The station reports from 1911 to 1977, 67 years of record.
1,464 records set at Deer Park AP still stand.
Records are tracked for tmax, tmin, prcp, snow: an element needs 30 years of data to be eligible.
Deer Park AP set a daily record high maximum temperature of 12.2 C (54.0 F) on 17 February 1977.

About the Station

Location: Washington, United States, 47.97 latitude, -117.43 longitude.
Elevation: 671 m (2,201 ft).
Period of record: 1911 to 1977, 67 years.
Eligible elements: tmax, tmin, 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 Deer Park AP. 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 Deer Park AP, with 2026 drawn through them
Month	Highest record high	Lowest record low	2026 highest maximum	2026 lowest minimum
Jan	13.3 C (55.9 F)	-41.1 C (-42.0 F)	n/a	n/a
Feb	16.7 C (62.1 F)	-40.0 C (-40.0 F)	n/a	n/a
Mar	21.7 C (71.1 F)	-26.7 C (-16.1 F)	n/a	n/a
Apr	31.1 C (88.0 F)	-12.8 C (9.0 F)	n/a	n/a
May	35.0 C (95.0 F)	-7.2 C (19.0 F)	n/a	n/a
Jun	38.9 C (102.0 F)	-4.4 C (24.1 F)	n/a	n/a
Jul	41.7 C (107.1 F)	-3.3 C (26.1 F)	n/a	n/a
Aug	40.6 C (105.1 F)	-5.0 C (23.0 F)	n/a	n/a
Sep	37.2 C (99.0 F)	-8.9 C (16.0 F)	n/a	n/a
Oct	31.7 C (89.1 F)	-16.1 C (3.0 F)	n/a	n/a
Nov	22.8 C (73.0 F)	-28.3 C (-18.9 F)	n/a	n/a
Dec	13.3 C (55.9 F)	-36.1 C (-33.0 F)	n/a	n/a

Which Years Hold Standing Records

1,464 standing records

1,464 records at Deer Park AP still stand. 1934 holds the most, with 53.

Standing records at Deer Park AP by the year they were set
Year set	Standing records
1911	11
1912	20
1913	45
1914	23
1915	15
1916	46
1917	34
1918	29
1919	50
1920	17
1921	10
1922	30
1923	10
1924	45
1925	29
1926	34
1927	18
1928	25
1929	26
1930	23
1931	26
1932	24
1933	26
1934	53
1935	28
1936	47
1937	40
1938	24
1939	24
1940	12
1941	19
1942	14
1943	27
1944	14
1945	21
1946	13
1947	14
1948	9
1949	20
1950	34
1951	20
1952	10
1953	17
1954	14
1955	27
1956	10
1957	13
1958	20
1959	14
1960	24
1961	23
1962	10
1963	24
1964	9
1965	18
1966	12
1967	16
1968	27
1969	10
1970	10
1971	15
1972	28
1973	14
1974	23
1975	18
1976	7
1977	2

All-Time Record Progression

4 new records

4 all-time records were set at Deer Park AP between 13 July 1960 and 26 January 1969. Each dot is a new record.

When Deer Park AP set new all-time records
Date	Kind	Detail
1960-07-13	Record high minimum temperature	Record high minimum temperature 20.6 C (69.1 F)
1966-12-13	Record daily precipitation	Record daily precipitation 50.0 mm (2.0 in)
1968-12-30	Record low maximum temperature	Record low maximum temperature -21.1 C (-6.0 F)
1969-01-26	Record daily snowfall	Record daily snowfall 29.0 cm (11.4 in)

Wettest Day of Each Month

Dec: 50.0 mm (2.0 in)

The wettest day on record for each calendar month at Deer Park AP. The most was 50.0 mm (2.0 in) on 13 December 1966.

Record daily precipitation for each month at Deer Park AP
Month	Record daily precipitation (mm)	Date
Jan	37.8 mm (1.5 in)	18 January 1932
Feb	48.8 mm (1.9 in)	16 February 1970
Mar	37.3 mm (1.5 in)	24 March 1962
Apr	48.3 mm (1.9 in)	25 April 1976
May	31.5 mm (1.2 in)	17 May 1941
Jun	47.5 mm (1.9 in)	10 June 1967
Jul	26.9 mm (1.1 in)	13 July 1975
Aug	35.8 mm (1.4 in)	20 August 1923
Sep	35.6 mm (1.4 in)	13 September 1927
Oct	36.1 mm (1.4 in)	3 October 1938
Nov	38.9 mm (1.5 in)	11 November 1968
Dec	50.0 mm (2.0 in)	13 December 1966

Period of Record Coverage

1911 to 1977

67 years of record at Deer Park AP, 1911 to 1977. 26 years have data for under 90 percent of days and are left out of rankings: 1911, 1921, 1944, 1946, 1947, 1948, 1949, 1950 and others.

Days with data per year at Deer Park AP
Year	Days with data	Share of year	Complete
1911	224	61%	No
1912	359	98%	Yes
1913	342	94%	Yes
1914	365	100%	Yes
1915	364	100%	Yes
1916	363	99%	Yes
1917	363	99%	Yes
1918	348	95%	Yes
1919	334	92%	Yes
1920	343	94%	Yes
1921	287	79%	No
1922	331	91%	Yes
1923	356	98%	Yes
1924	359	98%	Yes
1925	364	100%	Yes
1926	364	100%	Yes
1927	358	98%	Yes
1928	365	100%	Yes
1929	361	99%	Yes
1930	365	100%	Yes
1931	362	99%	Yes
1932	366	100%	Yes
1933	363	99%	Yes
1934	360	99%	Yes
1935	364	100%	Yes
1936	364	99%	Yes
1937	364	100%	Yes
1938	362	99%	Yes
1939	364	100%	Yes
1940	360	98%	Yes
1941	358	98%	Yes
1942	360	99%	Yes
1943	351	96%	Yes
1944	293	80%	No
1945	334	92%	Yes
1946	305	84%	No
1947	325	89%	No
1948	207	57%	No
1949	324	89%	No
1950	304	83%	No
1951	262	72%	No
1952	313	86%	No
1953	316	87%	No
1954	305	84%	No
1955	333	91%	Yes
1956	268	73%	No
1957	308	84%	No
1958	319	87%	No
1959	323	88%	No
1960	339	93%	Yes
1961	339	93%	Yes
1962	320	88%	No
1963	308	84%	No
1964	309	84%	No
1965	305	84%	No
1966	299	82%	No
1967	312	85%	No
1968	360	98%	Yes
1969	358	98%	Yes
1970	351	96%	Yes
1971	357	98%	Yes
1972	329	90%	No
1973	365	100%	Yes
1974	344	94%	Yes
1975	318	87%	No
1976	279	76%	No
1977	48	13%	No

Latest Records

Latest records at Deer Park AP
Date	Station	Record	Value	Beat old record by	Old record stood	Significance
17 February 1977	Deer Park AP, US	daily high max	12.2 C (54.0 F)	1.1 C (2.0 F)	53 years	23 of 100 (Routine)
16 February 1977	Deer Park AP, US	daily high max	10.6 C (51.1 F)	0.6 C (1.1 F)	5 years	8 of 100 (Routine)
18 November 1976	Deer Park AP, US	daily high max	13.3 C (55.9 F)	1.6 C (2.9 F)	44 years	22 of 100 (Routine)
25 August 1976	Deer Park AP, US	daily high min	15.0 C (59.0 F)	4.4 C (7.9 F)	44 years	30 of 100 (Routine)
25 August 1976	Deer Park AP, US	daily rain	13.5 mm (0.5 in)	7.7 mm (0.30 in)	11 years	20 of 100 (Routine)
7 August 1976	Deer Park AP, US	daily rain	15.2 mm (0.6 in)	7.1 mm (0.28 in)	65 years	20 of 100 (Routine)
2 August 1976	Deer Park AP, US	daily rain	12.4 mm (0.5 in)	7.8 mm (0.31 in)	6 years	20 of 100 (Routine)
1 August 1976	Deer Park AP, US	daily high min	17.8 C (64.0 F)	1.7 C (3.1 F)	64 years	29 of 100 (Routine)
1 June 1976	Deer Park AP, US	daily low max	11.7 C (53.1 F)	2.2 C (4.0 F)	58 years	27 of 100 (Routine)
31 May 1976	Deer Park AP, US	daily low max	11.7 C (53.1 F)	0.5 C (0.9 F)	46 years	19 of 100 (Routine)
27 April 1976	Deer Park AP, US	daily high min	9.4 C (48.9 F)	0.5 C (0.9 F)	42 years	19 of 100 (Routine)
25 April 1976	Deer Park AP, US	monthly rain	48.3 mm (1.9 in)	13.0 mm (0.5 in)	18 years	46 of 100 (Notable)
15 April 1976	Deer Park AP, US	daily rain	14.7 mm (0.6 in)	5.8 mm (0.23 in)	55 years	20 of 100 (Routine)
8 April 1976	Deer Park AP, US	daily high min (Tie)	6.7 C (44.1 F)	tie	36 years	4 of 100 (Routine)
1 April 1976	Deer Park AP, US	daily snowfall	1.3 cm (0.5 in)	1.3 cm (0.5 in)	64 years	20 of 100 (Routine)
23 March 1976	Deer Park AP, US	daily snowfall	6.4 cm (2.5 in)	5.9 cm (2.3 in)	41 years	33 of 100 (Routine)
23 March 1976	Deer Park AP, US	daily rain	16.3 mm (0.6 in)	3.3 mm (0.13 in)	13 years	16 of 100 (Routine)
20 March 1976	Deer Park AP, US	daily snowfall (Tie)	3.8 cm (1.5 in)	tie	39 years	4 of 100 (Routine)
19 March 1976	Deer Park AP, US	daily rain	26.7 mm (1.1 in)	16.5 mm (0.6 in)	31 years	51 of 100 (Notable)
19 March 1976	Deer Park AP, US	daily snowfall	10.9 cm (4.3 in)	9.6 cm (3.8 in)	41 years	43 of 100 (Notable)

Climate Trend

49 complete years, 1912 to 1974

One stripe for each of 49 complete years at Deer Park AP, 1912 to 1974. Blue stripes are years cooler than the station's own mean of 7.5 C (45.5 F); red stripes are warmer. The coolest year was 1916, at 5.1 C (41.1 F), and the warmest was 1934, at 9.7 C (49.5 F). The strongest colour marks a difference of 2.5 C (4.5 F).

Annual mean temperature at Deer Park AP as warming stripes, 1912 to 1974
Year	Annual mean temperature	Difference from the station mean
1912	6.7 C	-0.81 C
1914	7.2 C	-0.29 C
1915	7.5 C	+0.02 C
1916	5.1 C	-2.41 C
1917	6.4 C	-1.13 C
1918	7.6 C	+0.07 C
1920	7.7 C	+0.19 C
1923	7.6 C	+0.10 C
1924	7.7 C	+0.19 C
1925	8.9 C	+1.42 C
1926	8.6 C	+1.08 C
1927	7.3 C	-0.18 C
1928	7.8 C	+0.32 C
1929	6.3 C	-1.24 C
1930	7.5 C	+0.02 C
1931	7.9 C	+0.38 C
1932	7.0 C	-0.45 C
1933	7.4 C	-0.13 C
1934	9.7 C	+2.21 C
1935	7.3 C	-0.16 C
1936	6.9 C	-0.56 C
1937	6.0 C	-1.48 C
1938	7.4 C	-0.08 C
1939	7.5 C	-0.04 C
1940	8.1 C	+0.64 C
1941	8.0 C	+0.55 C
1942	7.0 C	-0.52 C
1945	7.8 C	+0.31 C
1946	7.6 C	+0.07 C
1947	7.9 C	+0.37 C
1950	6.4 C	-1.09 C
1952	7.2 C	-0.25 C
1953	8.5 C	+0.99 C
1954	6.9 C	-0.61 C
1955	5.7 C	-1.84 C
1958	8.6 C	+1.07 C
1959	6.8 C	-0.72 C
1960	7.4 C	-0.07 C
1961	8.3 C	+0.78 C
1962	7.6 C	+0.08 C
1963	8.3 C	+0.77 C
1965	7.6 C	+0.11 C
1966	8.0 C	+0.51 C
1968	7.6 C	+0.12 C
1969	7.2 C	-0.25 C
1970	7.5 C	+0.05 C
1971	7.5 C	-0.02 C
1973	8.6 C	+1.08 C
1974	8.2 C	+0.69 C

The fitted trend in annual mean temperature here over 1912 to 1974 is 0.10 C (-0.03 to 0.23) per decade. The interval includes zero, so the trend is not clearly different from zero. In Fahrenheit: 0.2 F (-0.1 to 0.4) per decade. The slope is a straight line fitted to 49 complete years; the brackets give its 95 percent interval.

Fitted temperature trends per decade at Deer Park AP
Measure	Per decade (C)	Per decade (F)	Period	Complete years	Reading
Annual mean temperature	0.10 C (-0.03 to 0.23) per decade	0.2 F (-0.1 to 0.4) per decade	1912 to 1974	49	Not clearly different from zero
Mean daily maximum	-0.1 C (-0.2 to 0.1) per decade	-0.1 F (-0.4 to 0.1) per decade	1912 to 1974	49	Not clearly different from zero
Mean daily minimum	0.3 C (0.1 to 0.4) per decade	0.5 F (0.2 to 0.7) per decade	1912 to 1974	49	Rise

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

1911 to 1977

Yearly extremes at Deer Park AP: the record and the median year
Measure	Record	Year of the record	Median year	Years with a value
Hottest day (TXx)	41.7 C (107.1 F)	1934	37.2 C (99.0 F)	67
Coldest night (TNn)	-41.1 C (-42.0 F)	1937	-26.1 C (-15.0 F)	67
Wettest day (Rx1day)	50.0 mm (2.0 in)	1966	26.9 mm (1.1 in)	67
Wettest five days (Rx5day)	100.0 mm (3.9 in)	1966	54.1 mm (2.1 in)	67
Longest dry spell (CDD)	95 days	1929	33 days	67

Hottest day (TXx)

The hottest day of the year at Deer Park AP, 1911 to 1977. The record is 41.7 C (107.1 F) in 1934, marked on the chart; the median year is 37.2 C (99.0 F).

Hottest day (TXx) at Deer Park AP by year
Year	Hottest day (TXx)
1911	37.2 C (99.0 F)
1912	36.7 C (98.1 F)
1913	35.6 C (96.1 F)
1914	37.2 C (99.0 F)
1915	36.1 C (97.0 F)
1916	35.6 C (96.1 F)
1917	36.7 C (98.1 F)
1918	37.8 C (100.0 F)
1919	38.3 C (100.9 F)
1920	40.0 C (104.0 F)
1921	36.1 C (97.0 F)
1922	38.3 C (100.9 F)
1923	37.8 C (100.0 F)
1924	41.1 C (106.0 F)
1925	38.9 C (102.0 F)
1926	38.9 C (102.0 F)
1927	37.8 C (100.0 F)
1928	40.6 C (105.1 F)
1929	38.3 C (100.9 F)
1930	38.9 C (102.0 F)
1931	38.9 C (102.0 F)
1932	37.2 C (99.0 F)
1933	37.8 C (100.0 F)
1934	41.7 C (107.1 F)
1935	37.8 C (100.0 F)
1936	38.9 C (102.0 F)
1937	37.8 C (100.0 F)
1938	38.9 C (102.0 F)
1939	40.0 C (104.0 F)
1940	36.7 C (98.1 F)
1941	39.4 C (102.9 F)
1942	37.8 C (100.0 F)
1943	36.7 C (98.1 F)
1944	37.8 C (100.0 F)
1945	36.1 C (97.0 F)
1946	37.8 C (100.0 F)
1947	36.7 C (98.1 F)
1948	33.9 C (93.0 F)
1949	38.3 C (100.9 F)
1950	34.4 C (93.9 F)
1951	36.1 C (97.0 F)
1952	35.0 C (95.0 F)
1953	34.4 C (93.9 F)
1954	32.8 C (91.0 F)
1955	36.7 C (98.1 F)
1956	36.7 C (98.1 F)
1957	32.2 C (90.0 F)
1958	35.6 C (96.1 F)
1959	36.7 C (98.1 F)
1960	38.9 C (102.0 F)
1961	40.6 C (105.1 F)
1962	36.1 C (97.0 F)
1963	36.1 C (97.0 F)
1964	36.1 C (97.0 F)
1965	36.7 C (98.1 F)
1966	35.6 C (96.1 F)
1967	37.8 C (100.0 F)
1968	37.2 C (99.0 F)
1969	37.8 C (100.0 F)
1970	37.2 C (99.0 F)
1971	37.8 C (100.0 F)
1972	38.9 C (102.0 F)
1973	37.2 C (99.0 F)
1974	34.4 C (93.9 F)
1975	37.8 C (100.0 F)
1976	35.0 C (95.0 F)
1977	13.3 C (55.9 F)

Coldest night (TNn)

The coldest night of the year at Deer Park AP, 1911 to 1977. The record is -41.1 C (-42.0 F) in 1937, marked on the chart; the median year is -26.1 C (-15.0 F).

Coldest night (TNn) at Deer Park AP by year
Year	Coldest night (TNn)
1911	-22.2 C (-8.0 F)
1912	-32.2 C (-26.0 F)
1913	-26.1 C (-15.0 F)
1914	-26.1 C (-15.0 F)
1915	-27.8 C (-18.0 F)
1916	-31.7 C (-25.1 F)
1917	-29.4 C (-20.9 F)
1918	-22.8 C (-9.0 F)
1919	-34.4 C (-29.9 F)
1920	-20.0 C (-4.0 F)
1921	-21.1 C (-6.0 F)
1922	-35.6 C (-32.1 F)
1923	-28.9 C (-20.0 F)
1924	-33.9 C (-29.0 F)
1925	-23.9 C (-11.0 F)
1926	-22.2 C (-8.0 F)
1927	-34.4 C (-29.9 F)
1928	-18.3 C (-0.9 F)
1929	-35.0 C (-31.0 F)
1930	-25.6 C (-14.1 F)
1931	-23.3 C (-9.9 F)
1932	-30.0 C (-22.0 F)
1933	-40.0 C (-40.0 F)
1934	-17.8 C (0.0 F)
1935	-37.2 C (-35.0 F)
1936	-34.4 C (-29.9 F)
1937	-41.1 C (-42.0 F)
1938	-18.9 C (-2.0 F)
1939	-32.8 C (-27.0 F)
1940	-18.9 C (-2.0 F)
1941	-17.8 C (0.0 F)
1942	-25.6 C (-14.1 F)
1943	-34.4 C (-29.9 F)
1944	-20.6 C (-5.1 F)
1945	-21.1 C (-6.0 F)
1946	-20.6 C (-5.1 F)
1947	-25.6 C (-14.1 F)
1948	-27.2 C (-17.0 F)
1949	-32.2 C (-26.0 F)
1950	-38.9 C (-38.0 F)
1951	-29.4 C (-20.9 F)
1952	-31.7 C (-25.1 F)
1953	-11.1 C (12.0 F)
1954	-27.8 C (-18.0 F)
1955	-28.3 C (-18.9 F)
1956	-32.2 C (-26.0 F)
1957	-34.4 C (-29.9 F)
1958	-20.0 C (-4.0 F)
1959	-23.3 C (-9.9 F)
1960	-23.9 C (-11.0 F)
1961	-25.0 C (-13.0 F)
1962	-30.0 C (-22.0 F)
1963	-21.7 C (-7.1 F)
1964	-36.1 C (-33.0 F)
1965	-17.8 C (0.0 F)
1966	-21.7 C (-7.1 F)
1967	-18.3 C (-0.9 F)
1968	-35.0 C (-31.0 F)
1969	-27.8 C (-18.0 F)
1970	-23.9 C (-11.0 F)
1971	-22.8 C (-9.0 F)
1972	-27.8 C (-18.0 F)
1973	-17.8 C (0.0 F)
1974	-25.0 C (-13.0 F)
1975	-30.0 C (-22.0 F)
1976	-18.9 C (-2.0 F)
1977	-15.0 C (5.0 F)

Wettest day (Rx1day)

The wettest day of the year at Deer Park AP, 1911 to 1977. The record is 50.0 mm (2.0 in) in 1966, marked on the chart; the median year is 26.9 mm (1.1 in).

Wettest day (Rx1day) at Deer Park AP by year
Year	Wettest day (Rx1day)
1911	20.6 mm (0.8 in)
1912	30.7 mm (1.2 in)
1913	20.3 mm (0.8 in)
1914	33.0 mm (1.3 in)
1915	25.9 mm (1.0 in)
1916	24.9 mm (1.0 in)
1917	25.4 mm (1.0 in)
1918	17.8 mm (0.7 in)
1919	26.9 mm (1.1 in)
1920	22.4 mm (0.9 in)
1921	23.9 mm (0.9 in)
1922	19.8 mm (0.8 in)
1923	35.8 mm (1.4 in)
1924	21.8 mm (0.9 in)
1925	21.3 mm (0.8 in)
1926	25.1 mm (1.0 in)
1927	35.6 mm (1.4 in)
1928	22.4 mm (0.9 in)
1929	29.2 mm (1.1 in)
1930	21.1 mm (0.8 in)
1931	30.5 mm (1.2 in)
1932	39.1 mm (1.5 in)
1933	23.9 mm (0.9 in)
1934	26.4 mm (1.0 in)
1935	24.4 mm (1.0 in)
1936	29.2 mm (1.1 in)
1937	26.2 mm (1.0 in)
1938	36.1 mm (1.4 in)
1939	32.3 mm (1.3 in)
1940	34.0 mm (1.3 in)
1941	33.5 mm (1.3 in)
1942	31.8 mm (1.3 in)
1943	26.7 mm (1.1 in)
1944	30.0 mm (1.2 in)
1945	26.7 mm (1.1 in)
1946	26.2 mm (1.0 in)
1947	23.6 mm (0.9 in)
1948	26.2 mm (1.0 in)
1949	33.5 mm (1.3 in)
1950	22.6 mm (0.9 in)
1951	27.9 mm (1.1 in)
1952	23.6 mm (0.9 in)
1953	25.1 mm (1.0 in)
1954	31.8 mm (1.3 in)
1955	24.1 mm (0.9 in)
1956	27.4 mm (1.1 in)
1957	25.1 mm (1.0 in)
1958	35.3 mm (1.4 in)
1959	27.4 mm (1.1 in)
1960	38.1 mm (1.5 in)
1961	28.7 mm (1.1 in)
1962	37.3 mm (1.5 in)
1963	27.9 mm (1.1 in)
1964	30.7 mm (1.2 in)
1965	23.4 mm (0.9 in)
1966	50.0 mm (2.0 in)
1967	47.5 mm (1.9 in)
1968	38.9 mm (1.5 in)
1969	22.9 mm (0.9 in)
1970	48.8 mm (1.9 in)
1971	37.6 mm (1.5 in)
1972	23.4 mm (0.9 in)
1973	32.3 mm (1.3 in)
1974	24.6 mm (1.0 in)
1975	37.1 mm (1.5 in)
1976	48.3 mm (1.9 in)
1977	10.7 mm (0.4 in)

Wettest five days (Rx5day)

The wettest five days of the year at Deer Park AP, 1911 to 1977. The record is 100.0 mm (3.9 in) in 1966, marked on the chart; the median year is 54.1 mm (2.1 in).

Wettest five days (Rx5day) at Deer Park AP by year
Year	Wettest five days (Rx5day)
1911	38.1 mm (1.5 in)
1912	66.4 mm (2.6 in)
1913	49.1 mm (1.9 in)
1914	54.1 mm (2.1 in)
1915	48.5 mm (1.9 in)
1916	47.5 mm (1.9 in)
1917	51.4 mm (2.0 in)
1918	37.9 mm (1.5 in)
1919	45.3 mm (1.8 in)
1920	67.1 mm (2.6 in)
1921	42.2 mm (1.7 in)
1922	60.2 mm (2.4 in)
1923	53.8 mm (2.1 in)
1924	55.1 mm (2.2 in)
1925	38.0 mm (1.5 in)
1926	47.4 mm (1.9 in)
1927	93.3 mm (3.7 in)
1928	43.9 mm (1.7 in)
1929	47.0 mm (1.9 in)
1930	44.0 mm (1.7 in)
1931	67.9 mm (2.7 in)
1932	62.3 mm (2.5 in)
1933	57.2 mm (2.3 in)
1934	73.4 mm (2.9 in)
1935	33.5 mm (1.3 in)
1936	63.5 mm (2.5 in)
1937	54.8 mm (2.2 in)
1938	39.1 mm (1.5 in)
1939	62.5 mm (2.5 in)
1940	45.7 mm (1.8 in)
1941	55.7 mm (2.2 in)
1942	47.2 mm (1.9 in)
1943	59.8 mm (2.4 in)
1944	45.0 mm (1.8 in)
1945	47.0 mm (1.9 in)
1946	40.9 mm (1.6 in)
1947	61.3 mm (2.4 in)
1948	55.7 mm (2.2 in)
1949	60.5 mm (2.4 in)
1950	37.6 mm (1.5 in)
1951	71.4 mm (2.8 in)
1952	33.5 mm (1.3 in)
1953	43.6 mm (1.7 in)
1954	34.5 mm (1.4 in)
1955	57.4 mm (2.3 in)
1956	44.4 mm (1.7 in)
1957	35.6 mm (1.4 in)
1958	52.0 mm (2.0 in)
1959	62.4 mm (2.5 in)
1960	61.8 mm (2.4 in)
1961	56.1 mm (2.2 in)
1962	57.4 mm (2.3 in)
1963	54.6 mm (2.1 in)
1964	46.5 mm (1.8 in)
1965	44.0 mm (1.7 in)
1966	100.0 mm (3.9 in)
1967	53.6 mm (2.1 in)
1968	66.7 mm (2.6 in)
1969	58.6 mm (2.3 in)
1970	85.9 mm (3.4 in)
1971	55.7 mm (2.2 in)
1972	59.0 mm (2.3 in)
1973	62.4 mm (2.5 in)
1974	56.9 mm (2.2 in)
1975	38.1 mm (1.5 in)
1976	60.2 mm (2.4 in)
1977	11.2 mm (0.4 in)

Longest dry spell (CDD)

The longest dry spell of the year at Deer Park AP, 1911 to 1977. The record is 95 days in 1929, marked on the chart; the median year is 33 days.

Longest dry spell (CDD) at Deer Park AP by year
Year	Longest dry spell (CDD)
1911	28 days
1912	24 days
1913	18 days
1914	55 days
1915	20 days
1916	33 days
1917	78 days
1918	31 days
1919	36 days
1920	43 days
1921	25 days
1922	33 days
1923	32 days
1924	36 days
1925	42 days
1926	58 days
1927	34 days
1928	35 days
1929	95 days
1930	38 days
1931	54 days
1932	35 days
1933	23 days
1934	37 days
1935	31 days
1936	25 days
1937	20 days
1938	31 days
1939	13 days
1940	8 days
1941	19 days
1942	40 days
1943	48 days
1944	37 days
1945	43 days
1946	33 days
1947	20 days
1948	36 days
1949	22 days
1950	34 days
1951	39 days
1952	45 days
1953	34 days
1954	29 days
1955	48 days
1956	28 days
1957	37 days
1958	28 days
1959	42 days
1960	43 days
1961	22 days
1962	28 days
1963	32 days
1964	23 days
1965	24 days
1966	30 days
1967	29 days
1968	18 days
1969	69 days
1970	31 days
1971	43 days
1972	25 days
1973	66 days
1974	47 days
1975	33 days
1976	27 days
1977	23 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

49 years with a frost

Across 49 years with a frost, the median last spring frost at Deer Park AP falls on 5 June and the median first autumn frost on 2 September, which leaves a median of 83 days between them.

Fitted over all years, the growing season changes by +8.3 days per decade at this station.

Frost dates and growing season at Deer Park AP
Measure	Median, all years	Earliest period	Recent period (1935 to 1974)	Recent against earliest	Fitted trend
Last spring frost	5 June	n/a	28 May	n/a	-3.8 days per decade
First autumn frost	2 September	n/a	3 September	n/a	+4.6 days per decade
Growing days	83 days	n/a	102 days	n/a	+8.3 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

53 years, 1912 to 1976

A day with at least 28.1 mm (1.1 in) of rain is expected about once in 2 years. A day with at least 57.7 mm (2.3 in) of rain is expected about once in 100 years.

Rainfall return levels at Deer Park AP: the daily rain expected about once in a given number of years
Expected about once in	A day with at least	Note
2 years	28.1 mm (1.1 in)
5 years	34.9 mm (1.4 in)
10 years	39.8 mm (1.6 in)
25 years	46.5 mm (1.8 in)
50 years	51.9 mm (2.0 in)
100 years	57.7 mm (2.3 in)	Longer than the 53 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, 53 years of values from 1912 to 1976.

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: 50.0 mm (2.0 in) in 1966; 48.8 mm (1.9 in) in 1970; 48.3 mm (1.9 in) in 1976.

Station Changes

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

Download the Data

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