Olympia AP Weather Records (USW00024227)

Record envelope, standing records and threshold days for Olympia AP (USW00024227), Washington, United States, with 86 years of record.

Key Facts for Olympia AP

Olympia AP (USW00024227) is a weather station in Washington, United States at 46.97 latitude and -122.91 longitude, 61 m (200 ft) above sea level.
The station reports from 1941 to 2026, 86 years of record.
1,464 records set at Olympia AP still stand.
Records are tracked for tmax, tmin, prcp, snow, snwd: an element needs 30 years of data to be eligible.
Olympia AP tied a daily record low minimum temperature of -2.2 C (28.0 F) on 12 October 2026 (provisional).

Provisional Records

Records set in the last 60 days are provisional until they clear the revision window.

About the Station

Location: Washington, United States, 46.97 latitude, -122.91 longitude.
Elevation: 61 m (200 ft).
Period of record: 1941 to 2026, 86 years.
Eligible elements: tmax, tmin, prcp, snow, snwd.

Daily Record Envelope and 2026

7 days at or beyond a record

The band shows the record high and record low for each calendar day at Olympia AP. The lines show the 2026 daily maximum and minimum. 7 days in 2026 matched or passed a record. Temperatures are in degrees Celsius.

Daily record high and record low at Olympia AP, 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)	-22.2 C (-8.0 F)	14.4 C (57.9 F)	-7.8 C (18.0 F)
Feb	22.8 C (73.0 F)	-18.3 C (-0.9 F)	17.8 C (64.0 F)	-5.0 C (23.0 F)
Mar	26.1 C (79.0 F)	-12.8 C (9.0 F)	18.9 C (66.0 F)	-4.4 C (24.1 F)
Apr	31.1 C (88.0 F)	-5.0 C (23.0 F)	25.0 C (77.0 F)	-2.8 C (27.0 F)
May	35.6 C (96.1 F)	-3.9 C (25.0 F)	29.4 C (84.9 F)	0.0 C (32.0 F)
Jun	43.3 C (109.9 F)	-1.1 C (30.0 F)	33.9 C (93.0 F)	3.3 C (37.9 F)
Jul	40.0 C (104.0 F)	1.7 C (35.1 F)	35.6 C (96.1 F)	6.1 C (43.0 F)
Aug	40.0 C (104.0 F)	0.6 C (33.1 F)	32.2 C (90.0 F)	6.7 C (44.1 F)
Sep	36.7 C (98.1 F)	-3.9 C (25.0 F)	27.8 C (82.0 F)	1.1 C (34.0 F)
Oct	32.2 C (90.0 F)	-10.0 C (14.0 F)	22.8 C (73.0 F)	-2.2 C (28.0 F)
Nov	23.3 C (73.9 F)	-18.3 C (-0.9 F)	n/a	n/a
Dec	17.8 C (64.0 F)	-21.7 C (-7.1 F)	n/a	n/a

Which Years Hold Standing Records

1,464 standing records

1,464 records at Olympia AP still stand. 1972 holds the most, with 42.

Standing records at Olympia AP by the year they were set
Year set	Standing records
1941	20
1942	17
1943	22
1944	16
1945	16
1946	8
1947	17
1948	15
1949	22
1950	34
1951	20
1952	11
1953	8
1954	18
1955	32
1956	16
1957	16
1958	25
1959	11
1960	20
1961	22
1962	26
1963	29
1964	24
1965	26
1966	22
1967	14
1968	15
1969	20
1970	18
1971	21
1972	42
1973	21
1974	15
1975	22
1976	25
1977	20
1978	18
1979	19
1980	20
1981	17
1982	15
1983	14
1984	10
1985	28
1986	13
1987	16
1988	13
1989	16
1990	18
1991	15
1992	19
1993	9
1994	13
1995	19
1996	18
1997	15
1998	8
1999	7
2000	4
2001	9
2002	24
2003	20
2004	12
2005	20
2006	8
2007	9
2008	13
2009	18
2010	10
2011	15
2012	14
2013	14
2014	16
2015	13
2016	14
2017	12
2018	13
2019	12
2020	12
2021	18
2022	15
2023	22
2024	17
2025	13
2026	11

All-Time Record Progression

8 new records

8 all-time records were set at Olympia AP between 24 January 1972 and 28 June 2021. Each dot is a new record.

When Olympia AP set new all-time records
Date	Kind	Detail
1972-01-24	Record daily snowfall	Record daily snowfall 36.1 cm (14.2 in)
1972-01-27	Record low minimum temperature	Record low minimum temperature -21.7 C (-7.1 F)
1979-01-01	Record low minimum temperature	Record low minimum temperature -22.2 C (-8.0 F)
1981-08-09	Record high maximum temperature	Record high maximum temperature 40.0 C (104.0 F)
2006-07-22	Record high minimum temperature	Record high minimum temperature 20.6 C (69.1 F)
2009-01-07	Record daily precipitation	Record daily precipitation 122.4 mm (4.8 in)
2021-06-27	Record high maximum temperature	Record high maximum temperature 40.6 C (105.1 F)
2021-06-28	Record high maximum temperature	Record high maximum temperature 43.3 C (109.9 F)

Wettest Day of Each Month

Jan: 122.4 mm (4.8 in)

The wettest day on record for each calendar month at Olympia AP. The most was 122.4 mm (4.8 in) on 7 January 2009.

Record daily precipitation for each month at Olympia AP
Month	Record daily precipitation (mm)	Date
Jan	122.4 mm (4.8 in)	7 January 2009
Feb	92.5 mm (3.6 in)	9 February 1951
Mar	86.4 mm (3.4 in)	5 March 1972
Apr	79.0 mm (3.1 in)	4 April 1991
May	39.1 mm (1.5 in)	5 May 1948
Jun	40.6 mm (1.6 in)	6 June 1985
Jul	34.0 mm (1.3 in)	9 July 1995
Aug	35.1 mm (1.4 in)	23 August 1977
Sep	74.4 mm (2.9 in)	28 September 2013
Oct	104.6 mm (4.1 in)	20 October 2003
Nov	110.0 mm (4.3 in)	19 November 1962
Dec	88.9 mm (3.5 in)	9 December 1956

Period of Record Coverage

1941 to 2026

86 years of record at Olympia AP, 1941 to 2026. 2 years have data for under 90 percent of days and are left out of rankings: 1941, 2026.

Days with data per year at Olympia AP
Year	Days with data	Share of year	Complete
1941	233	64%	No
1942	365	100%	Yes
1943	365	100%	Yes
1944	366	100%	Yes
1945	365	100%	Yes
1946	365	100%	Yes
1947	365	100%	Yes
1948	366	100%	Yes
1949	365	100%	Yes
1950	365	100%	Yes
1951	365	100%	Yes
1952	366	100%	Yes
1953	365	100%	Yes
1954	365	100%	Yes
1955	365	100%	Yes
1956	366	100%	Yes
1957	365	100%	Yes
1958	365	100%	Yes
1959	365	100%	Yes
1960	366	100%	Yes
1961	365	100%	Yes
1962	365	100%	Yes
1963	365	100%	Yes
1964	366	100%	Yes
1965	365	100%	Yes
1966	365	100%	Yes
1967	365	100%	Yes
1968	366	100%	Yes
1969	365	100%	Yes
1970	365	100%	Yes
1971	365	100%	Yes
1972	366	100%	Yes
1973	365	100%	Yes
1974	365	100%	Yes
1975	365	100%	Yes
1976	366	100%	Yes
1977	365	100%	Yes
1978	365	100%	Yes
1979	365	100%	Yes
1980	366	100%	Yes
1981	365	100%	Yes
1982	365	100%	Yes
1983	365	100%	Yes
1984	366	100%	Yes
1985	365	100%	Yes
1986	365	100%	Yes
1987	365	100%	Yes
1988	366	100%	Yes
1989	365	100%	Yes
1990	365	100%	Yes
1991	365	100%	Yes
1992	366	100%	Yes
1993	365	100%	Yes
1994	365	100%	Yes
1995	365	100%	Yes
1996	364	99%	Yes
1997	356	98%	Yes
1998	365	100%	Yes
1999	365	100%	Yes
2000	366	100%	Yes
2001	365	100%	Yes
2002	364	100%	Yes
2003	365	100%	Yes
2004	366	100%	Yes
2005	365	100%	Yes
2006	365	100%	Yes
2007	365	100%	Yes
2008	366	100%	Yes
2009	365	100%	Yes
2010	365	100%	Yes
2011	365	100%	Yes
2012	366	100%	Yes
2013	365	100%	Yes
2014	365	100%	Yes
2015	365	100%	Yes
2016	366	100%	Yes
2017	365	100%	Yes
2018	365	100%	Yes
2019	365	100%	Yes
2020	366	100%	Yes
2021	365	100%	Yes
2022	365	100%	Yes
2023	363	99%	Yes
2024	366	100%	Yes
2025	360	99%	Yes
2026	286	78%	No

Latest Records

Latest records at Olympia AP
Date	Station	Record	Value	Beat old record by	Old record stood	Significance
12 October 2026	Olympia AP, US	daily low min (Tie, Provisional)	-2.2 C (28.0 F)	tie	24 years	3 of 100 (Routine)
25 September 2026	Olympia AP, US	daily low max (Tie, Provisional)	14.4 C (57.9 F)	tie	40 years	5 of 100 (Routine)
22 August 2026	Olympia AP, US	daily high min (Tie, Provisional)	14.4 C (57.9 F)	tie	1 year	2 of 100 (Routine)
15 June 2026	Olympia AP, US	daily high max	33.9 C (93.0 F)	2.8 C (5.0 F)	63 years	31 of 100 (Routine)
14 June 2026	Olympia AP, US	daily high max	33.3 C (91.9 F)	2.2 C (4.0 F)	37 years	23 of 100 (Routine)
8 June 2026	Olympia AP, US	daily rain	32.3 mm (1.3 in)	2.8 mm (0.11 in)	44 years	26 of 100 (Routine)
3 June 2026	Olympia AP, US	daily high min	12.8 C (55.0 F)	0.6 C (1.1 F)	56 years	26 of 100 (Routine)
15 May 2026	Olympia AP, US	daily low max (Tie)	10.6 C (51.1 F)	tie	52 years	5 of 100 (Routine)
3 May 2026	Olympia AP, US	daily high max	29.4 C (84.9 F)	1.6 C (2.9 F)	81 years	35 of 100 (Notable)
21 April 2026	Olympia AP, US	daily high min	9.4 C (48.9 F)	1.1 C (2.0 F)	56 years	28 of 100 (Routine)
16 April 2026	Olympia AP, US	daily low min (Tie)	-2.8 C (27.0 F)	tie	49 years	5 of 100 (Routine)
19 March 2026	Olympia AP, US	daily high min (Tie)	10.0 C (50.0 F)	tie	28 years	4 of 100 (Routine)
18 March 2026	Olympia AP, US	daily high min	10.0 C (50.0 F)	2.2 C (4.0 F)	19 years	19 of 100 (Routine)
17 March 2026	Olympia AP, US	daily high min	9.4 C (48.9 F)	3.3 C (5.9 F)	76 years	40 of 100 (Notable)
13 March 2026	Olympia AP, US	daily rain	45.7 mm (1.8 in)	15.0 mm (0.6 in)	17 years	31 of 100 (Routine)
13 March 2026	Olympia AP, US	daily low max	2.8 C (37.0 F)	1.1 C (2.0 F)	5 years	12 of 100 (Routine)
11 March 2026	Olympia AP, US	daily rain	55.1 mm (2.2 in)	18.5 mm (0.7 in)	24 years	38 of 100 (Notable)
7 March 2026	Olympia AP, US	daily high min	8.9 C (48.0 F)	1.1 C (2.0 F)	40 years	23 of 100 (Routine)
4 February 2026	Olympia AP, US	daily high max	17.8 C (64.0 F)	2.2 C (4.0 F)	16 years	19 of 100 (Routine)
13 January 2026	Olympia AP, US	daily high max	14.4 C (57.9 F)	0.5 C (0.9 F)	32 years	18 of 100 (Routine)

Climate Trend

84 complete years, 1942 to 2025

One stripe for each of 84 complete years at Olympia AP, 1942 to 2025. Blue stripes are years cooler than the station's own mean of 10.1 C (50.2 F); red stripes are warmer. The coolest year was 1955, at 8.7 C (47.6 F), and the warmest was 1958, at 11.8 C (53.2 F). The strongest colour marks a difference of 1.7 C (3.1 F).

Annual mean temperature at Olympia AP as warming stripes, 1942 to 2025
Year	Annual mean temperature	Difference from the station mean
1942	10.4 C	+0.30 C
1943	10.0 C	-0.10 C
1944	10.5 C	+0.35 C
1945	10.1 C	+0.02 C
1946	9.8 C	-0.34 C
1947	10.4 C	+0.32 C
1948	9.1 C	-1.04 C
1949	9.5 C	-0.59 C
1950	9.3 C	-0.77 C
1951	9.8 C	-0.34 C
1952	9.7 C	-0.37 C
1953	10.2 C	+0.13 C
1954	9.3 C	-0.84 C
1955	8.7 C	-1.42 C
1956	9.6 C	-0.47 C
1957	10.2 C	+0.14 C
1958	11.8 C	+1.66 C
1959	9.9 C	-0.21 C
1960	9.7 C	-0.43 C
1961	10.1 C	+0.04 C
1962	9.7 C	-0.38 C
1963	10.2 C	+0.10 C
1964	8.8 C	-1.31 C
1965	10.4 C	+0.26 C
1966	9.9 C	-0.16 C
1967	10.7 C	+0.55 C
1968	10.0 C	-0.09 C
1969	9.8 C	-0.26 C
1970	9.5 C	-0.58 C
1971	9.3 C	-0.83 C
1972	9.2 C	-0.95 C
1973	9.6 C	-0.55 C
1974	10.3 C	+0.15 C
1975	9.2 C	-0.86 C
1976	9.3 C	-0.80 C
1977	9.7 C	-0.40 C
1978	10.1 C	+0.04 C
1979	10.1 C	0.00 C
1980	9.9 C	-0.19 C
1981	10.8 C	+0.73 C
1982	10.0 C	-0.09 C
1983	10.5 C	+0.39 C
1984	10.0 C	-0.12 C
1985	9.2 C	-0.94 C
1986	10.4 C	+0.26 C
1987	10.7 C	+0.62 C
1988	10.0 C	-0.09 C
1989	9.9 C	-0.25 C
1990	10.0 C	-0.13 C
1991	10.0 C	-0.06 C
1992	11.1 C	+1.04 C
1993	10.1 C	-0.03 C
1994	10.7 C	+0.56 C
1995	11.0 C	+0.92 C
1996	9.8 C	-0.27 C
1997	10.5 C	+0.38 C
1998	10.6 C	+0.50 C
1999	9.8 C	-0.35 C
2000	9.7 C	-0.43 C
2001	9.4 C	-0.75 C
2002	9.7 C	-0.38 C
2003	10.5 C	+0.44 C
2004	10.8 C	+0.73 C
2005	10.5 C	+0.38 C
2006	10.4 C	+0.28 C
2007	10.0 C	-0.15 C
2008	9.5 C	-0.58 C
2009	9.8 C	-0.33 C
2010	10.2 C	+0.12 C
2011	9.3 C	-0.82 C
2012	10.0 C	-0.15 C
2013	10.3 C	+0.16 C
2014	11.2 C	+1.06 C
2015	11.6 C	+1.53 C
2016	11.2 C	+1.09 C
2017	10.3 C	+0.23 C
2018	10.7 C	+0.60 C
2019	10.2 C	+0.09 C
2020	10.8 C	+0.72 C
2021	10.7 C	+0.62 C
2022	10.4 C	+0.25 C
2023	10.9 C	+0.83 C
2024	11.1 C	+0.99 C
2025	10.9 C	+0.76 C

The annual mean temperature here has risen by 0.1 C (0.1 to 0.2) per decade over 1942 to 2025. In Fahrenheit: 0.2 F (0.1 to 0.3) per decade. The slope is a straight line fitted to 84 complete years; the brackets give its 95 percent interval.

Fitted temperature trends per decade at Olympia AP
Measure	Per decade (C)	Per decade (F)	Period	Complete years	Reading
Annual mean temperature	0.1 C (0.1 to 0.2) per decade	0.2 F (0.1 to 0.3) per decade	1942 to 2025	84	Rise
Mean daily maximum	0.09 C (0.03 to 0.15) per decade	0.2 F (0.1 to 0.3) per decade	1942 to 2025	84	Rise
Mean daily minimum	0.1 C (0.1 to 0.2) per decade	0.2 F (0.1 to 0.3) per decade	1942 to 2025	84	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

1941 to 2026

Yearly extremes at Olympia AP: the record and the median year
Measure	Record	Year of the record	Median year	Years with a value
Hottest day (TXx)	43.3 C (109.9 F)	2021	35.6 C (96.1 F)	86
Coldest night (TNn)	-22.2 C (-8.0 F)	1979	-11.3 C (11.6 F)	86
Wettest day (Rx1day)	122.4 mm (4.8 in)	2009	60.2 mm (2.4 in)	86
Wettest five days (Rx5day)	248.7 mm (9.8 in)	2006	124.7 mm (4.9 in)	86
Longest dry spell (CDD)	93 days	2021	33 days	86

Hottest day (TXx)

The hottest day of the year at Olympia AP, 1941 to 2026. The record is 43.3 C (109.9 F) in 2021, marked on the chart; the median year is 35.6 C (96.1 F).

Hottest day (TXx) at Olympia AP by year
Year	Hottest day (TXx)
1941	39.4 C (102.9 F)
1942	38.9 C (102.0 F)
1943	33.9 C (93.0 F)
1944	35.6 C (96.1 F)
1945	35.0 C (95.0 F)
1946	35.0 C (95.0 F)
1947	32.8 C (91.0 F)
1948	34.4 C (93.9 F)
1949	33.9 C (93.0 F)
1950	34.4 C (93.9 F)
1951	35.0 C (95.0 F)
1952	34.4 C (93.9 F)
1953	35.0 C (95.0 F)
1954	30.0 C (86.0 F)
1955	36.1 C (97.0 F)
1956	37.8 C (100.0 F)
1957	32.8 C (91.0 F)
1958	37.2 C (99.0 F)
1959	36.1 C (97.0 F)
1960	37.8 C (100.0 F)
1961	37.8 C (100.0 F)
1962	34.4 C (93.9 F)
1963	32.8 C (91.0 F)
1964	30.6 C (87.1 F)
1965	37.2 C (99.0 F)
1966	32.8 C (91.0 F)
1967	36.7 C (98.1 F)
1968	35.0 C (95.0 F)
1969	33.9 C (93.0 F)
1970	35.6 C (96.1 F)
1971	37.2 C (99.0 F)
1972	35.6 C (96.1 F)
1973	33.3 C (91.9 F)
1974	33.3 C (91.9 F)
1975	32.2 C (90.0 F)
1976	30.0 C (86.0 F)
1977	36.7 C (98.1 F)
1978	37.8 C (100.0 F)
1979	36.7 C (98.1 F)
1980	33.3 C (91.9 F)
1981	40.0 C (104.0 F)
1982	36.7 C (98.1 F)
1983	35.6 C (96.1 F)
1984	33.9 C (93.0 F)
1985	35.6 C (96.1 F)
1986	33.9 C (93.0 F)
1987	34.4 C (93.9 F)
1988	36.7 C (98.1 F)
1989	33.3 C (91.9 F)
1990	36.7 C (98.1 F)
1991	37.2 C (99.0 F)
1992	35.6 C (96.1 F)
1993	36.7 C (98.1 F)
1994	38.9 C (102.0 F)
1995	36.7 C (98.1 F)
1996	35.0 C (95.0 F)
1997	32.8 C (91.0 F)
1998	37.8 C (100.0 F)
1999	31.7 C (89.1 F)
2000	32.8 C (91.0 F)
2001	32.8 C (91.0 F)
2002	34.4 C (93.9 F)
2003	35.6 C (96.1 F)
2004	37.2 C (99.0 F)
2005	33.3 C (91.9 F)
2006	38.3 C (100.9 F)
2007	37.2 C (99.0 F)
2008	34.4 C (93.9 F)
2009	40.0 C (104.0 F)
2010	36.1 C (97.0 F)
2011	31.1 C (88.0 F)
2012	35.6 C (96.1 F)
2013	33.3 C (91.9 F)
2014	35.6 C (96.1 F)
2015	36.7 C (98.1 F)
2016	36.1 C (97.0 F)
2017	36.7 C (98.1 F)
2018	35.6 C (96.1 F)
2019	33.9 C (93.0 F)
2020	37.2 C (99.0 F)
2021	43.3 C (109.9 F)
2022	37.2 C (99.0 F)
2023	37.8 C (100.0 F)
2024	37.8 C (100.0 F)
2025	35.0 C (95.0 F)
2026	35.6 C (96.1 F)

Coldest night (TNn)

The coldest night of the year at Olympia AP, 1941 to 2026. The record is -22.2 C (-8.0 F) in 1979, marked on the chart; the median year is -11.3 C (11.6 F).

Coldest night (TNn) at Olympia AP by year
Year	Coldest night (TNn)
1941	-8.3 C (17.1 F)
1942	-12.2 C (10.0 F)
1943	-16.7 C (1.9 F)
1944	-10.6 C (12.9 F)
1945	-7.8 C (18.0 F)
1946	-8.9 C (16.0 F)
1947	-11.7 C (10.9 F)
1948	-10.0 C (14.0 F)
1949	-17.2 C (1.0 F)
1950	-18.3 C (-0.9 F)
1951	-12.8 C (9.0 F)
1952	-13.3 C (8.1 F)
1953	-7.2 C (19.0 F)
1954	-13.9 C (7.0 F)
1955	-18.3 C (-0.9 F)
1956	-13.9 C (7.0 F)
1957	-17.8 C (0.0 F)
1958	-8.3 C (17.1 F)
1959	-13.9 C (7.0 F)
1960	-10.0 C (14.0 F)
1961	-8.3 C (17.1 F)
1962	-15.6 C (3.9 F)
1963	-15.0 C (5.0 F)
1964	-16.1 C (3.0 F)
1965	-7.8 C (18.0 F)
1966	-6.1 C (21.0 F)
1967	-11.1 C (12.0 F)
1968	-14.4 C (6.1 F)
1969	-15.6 C (3.9 F)
1970	-8.3 C (17.1 F)
1971	-10.0 C (14.0 F)
1972	-21.7 C (-7.1 F)
1973	-13.9 C (7.0 F)
1974	-14.4 C (6.1 F)
1975	-10.0 C (14.0 F)
1976	-10.6 C (12.9 F)
1977	-11.7 C (10.9 F)
1978	-20.6 C (-5.1 F)
1979	-22.2 C (-8.0 F)
1980	-17.8 C (0.0 F)
1981	-8.9 C (16.0 F)
1982	-14.4 C (6.1 F)
1983	-21.7 C (-7.1 F)
1984	-10.6 C (12.9 F)
1985	-17.8 C (0.0 F)
1986	-7.8 C (18.0 F)
1987	-7.8 C (18.0 F)
1988	-8.3 C (17.1 F)
1989	-16.7 C (1.9 F)
1990	-17.8 C (0.0 F)
1991	-8.3 C (17.1 F)
1992	-7.8 C (18.0 F)
1993	-12.2 C (10.0 F)
1994	-14.4 C (6.1 F)
1995	-8.9 C (16.0 F)
1996	-12.2 C (10.0 F)
1997	-9.4 C (15.1 F)
1998	-18.3 C (-0.9 F)
1999	-6.1 C (21.0 F)
2000	-7.8 C (18.0 F)
2001	-7.8 C (18.0 F)
2002	-10.0 C (14.0 F)
2003	-8.3 C (17.1 F)
2004	-12.2 C (10.0 F)
2005	-10.6 C (12.9 F)
2006	-10.6 C (12.9 F)
2007	-11.1 C (12.0 F)
2008	-13.9 C (7.0 F)
2009	-14.4 C (6.1 F)
2010	-12.8 C (9.0 F)
2011	-15.0 C (5.0 F)
2012	-7.8 C (18.0 F)
2013	-11.6 C (11.1 F)
2014	-10.5 C (13.1 F)
2015	-7.7 C (18.1 F)
2016	-10.5 C (13.1 F)
2017	-11.0 C (12.2 F)
2018	-10.5 C (13.1 F)
2019	-14.9 C (5.2 F)
2020	-6.6 C (20.1 F)
2021	-13.8 C (7.2 F)
2022	-13.8 C (7.2 F)
2023	-9.3 C (15.3 F)
2024	-11.6 C (11.1 F)
2025	-11.0 C (12.2 F)
2026	-7.8 C (18.0 F)

Wettest day (Rx1day)

The wettest day of the year at Olympia AP, 1941 to 2026. The record is 122.4 mm (4.8 in) in 2009, marked on the chart; the median year is 60.2 mm (2.4 in).

Wettest day (Rx1day) at Olympia AP by year
Year	Wettest day (Rx1day)
1941	42.7 mm (1.7 in)
1942	51.3 mm (2.0 in)
1943	37.6 mm (1.5 in)
1944	25.1 mm (1.0 in)
1945	46.0 mm (1.8 in)
1946	41.4 mm (1.6 in)
1947	45.7 mm (1.8 in)
1948	61.0 mm (2.4 in)
1949	74.7 mm (2.9 in)
1950	60.2 mm (2.4 in)
1951	92.5 mm (3.6 in)
1952	34.0 mm (1.3 in)
1953	51.6 mm (2.0 in)
1954	49.5 mm (1.9 in)
1955	68.3 mm (2.7 in)
1956	88.9 mm (3.5 in)
1957	37.1 mm (1.5 in)
1958	51.3 mm (2.0 in)
1959	86.6 mm (3.4 in)
1960	51.1 mm (2.0 in)
1961	42.9 mm (1.7 in)
1962	110.0 mm (4.3 in)
1963	53.3 mm (2.1 in)
1964	62.2 mm (2.4 in)
1965	58.7 mm (2.3 in)
1966	45.7 mm (1.8 in)
1967	62.7 mm (2.5 in)
1968	50.8 mm (2.0 in)
1969	49.3 mm (1.9 in)
1970	63.5 mm (2.5 in)
1971	53.6 mm (2.1 in)
1972	86.4 mm (3.4 in)
1973	36.3 mm (1.4 in)
1974	45.0 mm (1.8 in)
1975	55.6 mm (2.2 in)
1976	49.0 mm (1.9 in)
1977	61.2 mm (2.4 in)
1978	42.7 mm (1.7 in)
1979	61.2 mm (2.4 in)
1980	50.8 mm (2.0 in)
1981	71.6 mm (2.8 in)
1982	70.4 mm (2.8 in)
1983	47.2 mm (1.9 in)
1984	58.4 mm (2.3 in)
1985	64.3 mm (2.5 in)
1986	86.1 mm (3.4 in)
1987	64.8 mm (2.6 in)
1988	51.6 mm (2.0 in)
1989	57.7 mm (2.3 in)
1990	103.6 mm (4.1 in)
1991	79.0 mm (3.1 in)
1992	45.5 mm (1.8 in)
1993	39.6 mm (1.6 in)
1994	74.9 mm (2.9 in)
1995	60.2 mm (2.4 in)
1996	69.9 mm (2.8 in)
1997	65.3 mm (2.6 in)
1998	77.7 mm (3.1 in)
1999	64.3 mm (2.5 in)
2000	35.8 mm (1.4 in)
2001	92.5 mm (3.6 in)
2002	62.7 mm (2.5 in)
2003	104.6 mm (4.1 in)
2004	44.7 mm (1.8 in)
2005	56.1 mm (2.2 in)
2006	109.5 mm (4.3 in)
2007	81.0 mm (3.2 in)
2008	63.8 mm (2.5 in)
2009	122.4 mm (4.8 in)
2010	45.7 mm (1.8 in)
2011	68.8 mm (2.7 in)
2012	58.2 mm (2.3 in)
2013	74.4 mm (2.9 in)
2014	45.0 mm (1.8 in)
2015	73.4 mm (2.9 in)
2016	51.1 mm (2.0 in)
2017	73.9 mm (2.9 in)
2018	51.6 mm (2.0 in)
2019	72.9 mm (2.9 in)
2020	76.5 mm (3.0 in)
2021	77.2 mm (3.0 in)
2022	101.3 mm (4.0 in)
2023	75.2 mm (3.0 in)
2024	59.9 mm (2.4 in)
2025	77.0 mm (3.0 in)
2026	55.1 mm (2.2 in)

Wettest five days (Rx5day)

The wettest five days of the year at Olympia AP, 1941 to 2026. The record is 248.7 mm (9.8 in) in 2006, marked on the chart; the median year is 124.7 mm (4.9 in).

Wettest five days (Rx5day) at Olympia AP by year
Year	Wettest five days (Rx5day)
1941	121.2 mm (4.8 in)
1942	113.3 mm (4.5 in)
1943	95.5 mm (3.8 in)
1944	67.4 mm (2.7 in)
1945	91.2 mm (3.6 in)
1946	86.6 mm (3.4 in)
1947	84.6 mm (3.3 in)
1948	115.4 mm (4.5 in)
1949	143.6 mm (5.7 in)
1950	124.5 mm (4.9 in)
1951	182.2 mm (7.2 in)
1952	77.1 mm (3.0 in)
1953	117.9 mm (4.6 in)
1954	153.1 mm (6.0 in)
1955	141.5 mm (5.6 in)
1956	147.0 mm (5.8 in)
1957	89.2 mm (3.5 in)
1958	128.6 mm (5.1 in)
1959	195.6 mm (7.7 in)
1960	124.6 mm (4.9 in)
1961	116.8 mm (4.6 in)
1962	124.7 mm (4.9 in)
1963	120.7 mm (4.8 in)
1964	116.8 mm (4.6 in)
1965	107.7 mm (4.2 in)
1966	112.5 mm (4.4 in)
1967	100.8 mm (4.0 in)
1968	105.6 mm (4.2 in)
1969	78.7 mm (3.1 in)
1970	127.7 mm (5.0 in)
1971	137.1 mm (5.4 in)
1972	155.7 mm (6.1 in)
1973	129.1 mm (5.1 in)
1974	115.9 mm (4.6 in)
1975	163.8 mm (6.4 in)
1976	103.2 mm (4.1 in)
1977	150.9 mm (5.9 in)
1978	80.0 mm (3.1 in)
1979	162.8 mm (6.4 in)
1980	122.2 mm (4.8 in)
1981	144.4 mm (5.7 in)
1982	141.2 mm (5.6 in)
1983	127.5 mm (5.0 in)
1984	102.4 mm (4.0 in)
1985	143.8 mm (5.7 in)
1986	187.2 mm (7.4 in)
1987	118.4 mm (4.7 in)
1988	100.8 mm (4.0 in)
1989	110.6 mm (4.4 in)
1990	212.3 mm (8.4 in)
1991	157.0 mm (6.2 in)
1992	124.1 mm (4.9 in)
1993	73.4 mm (2.9 in)
1994	118.0 mm (4.6 in)
1995	139.5 mm (5.5 in)
1996	204.7 mm (8.1 in)
1997	131.7 mm (5.2 in)
1998	155.6 mm (6.1 in)
1999	154.5 mm (6.1 in)
2000	72.7 mm (2.9 in)
2001	159.0 mm (6.3 in)
2002	109.3 mm (4.3 in)
2003	183.9 mm (7.2 in)
2004	93.0 mm (3.7 in)
2005	107.6 mm (4.2 in)
2006	248.7 mm (9.8 in)
2007	156.4 mm (6.2 in)
2008	113.4 mm (4.5 in)
2009	177.7 mm (7.0 in)
2010	129.2 mm (5.1 in)
2011	123.9 mm (4.9 in)
2012	114.3 mm (4.5 in)
2013	172.2 mm (6.8 in)
2014	113.0 mm (4.4 in)
2015	225.0 mm (8.9 in)
2016	136.4 mm (5.4 in)
2017	149.4 mm (5.9 in)
2018	95.9 mm (3.8 in)
2019	151.6 mm (6.0 in)
2020	126.5 mm (5.0 in)
2021	125.3 mm (4.9 in)
2022	172.1 mm (6.8 in)
2023	170.9 mm (6.7 in)
2024	108.2 mm (4.3 in)
2025	160.8 mm (6.3 in)
2026	123.5 mm (4.9 in)

Longest dry spell (CDD)

The longest dry spell of the year at Olympia AP, 1941 to 2026. The record is 93 days in 2021, marked on the chart; the median year is 33 days.

Longest dry spell (CDD) at Olympia AP by year
Year	Longest dry spell (CDD)
1941	25 days
1942	39 days
1943	25 days
1944	50 days
1945	38 days
1946	32 days
1947	29 days
1948	17 days
1949	20 days
1950	30 days
1951	51 days
1952	37 days
1953	23 days
1954	25 days
1955	44 days
1956	37 days
1957	26 days
1958	39 days
1959	33 days
1960	55 days
1961	29 days
1962	27 days
1963	24 days
1964	14 days
1965	25 days
1966	22 days
1967	74 days
1968	24 days
1969	47 days
1970	44 days
1971	40 days
1972	32 days
1973	40 days
1974	35 days
1975	32 days
1976	29 days
1977	48 days
1978	30 days
1979	33 days
1980	47 days
1981	46 days
1982	21 days
1983	30 days
1984	36 days
1985	45 days
1986	53 days
1987	46 days
1988	33 days
1989	19 days
1990	41 days
1991	45 days
1992	31 days
1993	50 days
1994	28 days
1995	23 days
1996	25 days
1997	42 days
1998	48 days
1999	30 days
2000	39 days
2001	32 days
2002	31 days
2003	25 days
2004	51 days
2005	36 days
2006	38 days
2007	26 days
2008	24 days
2009	28 days
2010	36 days
2011	31 days
2012	46 days
2013	42 days
2014	24 days
2015	39 days
2016	27 days
2017	32 days
2018	34 days
2019	21 days
2020	41 days
2021	93 days
2022	84 days
2023	51 days
2024	29 days
2025	45 days
2026	30 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

84 years with a frost

Across 84 years with a frost, the median last spring frost at Olympia AP falls on 7 May and the median first autumn frost on 11 October, which leaves a median of 158 days between them.

In 1996 to 2025 the median growing season was 164 days. That is 15 days more than in 1942 to 1971.

Fitted over all years, the growing season changes by +2.6 days per decade at this station.

Frost dates and growing season at Olympia AP
Measure	Median, all years	Earliest period (1942 to 1971)	Recent period (1996 to 2025)	Recent against earliest	Fitted trend
Last spring frost	7 May	9 May	4 May	5 days earlier	-1.3 days per decade
First autumn frost	11 October	9 October	15 October	6 days later	+1.2 days per decade
Growing days	158 days	149 days	164 days	15 days more	+2.6 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

84 years, 1942 to 2025

A day with at least 60.1 mm (2.4 in) of rain is expected about once in 2 years. A day with at least 123.8 mm (4.9 in) of rain is expected about once in 100 years.

Rainfall return levels at Olympia 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	60.1 mm (2.4 in)
5 years	77.6 mm (3.1 in)
10 years	89.0 mm (3.5 in)
25 years	103.3 mm (4.1 in)
50 years	113.7 mm (4.5 in)
100 years	123.8 mm (4.9 in)	Longer than the 84 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, 84 years of values from 1942 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: 122.4 mm (4.8 in) in 2009; 110.0 mm (4.3 in) in 1962; 109.5 mm (4.3 in) in 2006.

Station Changes

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

Climate Twins

2011 to 2025 against 1961 to 1990

Over 2011 to 2025, Olympia AP had a mean temperature of 10.6 C (51.1 F) and 1,295.1 mm (51.0 in) of rain a year. The 3 stations whose 1961 to 1990 climate was closest to that are Monroe (United States, 119 km away), Cottage Grove Dam (United States, 362 km away) and Battle Ground (United States, 137 km away).

Climate twins of Olympia AP: stations whose 1961 to 1990 climate is closest to its 2011 to 2025 climate
Twin station	Country	Distance away	Mean temperature, 1961-1990	Rain a year, 1961-1990	Climate difference
Monroe	United States	119 km (74 mi)	10.6 C (51.2 F)	1,229.9 mm (48.4 in)	0.62
Cottage Grove Dam	United States	362 km (225 mi)	10.7 C (51.3 F)	1,222.6 mm (48.1 in)	0.65
Battle Ground	United States	137 km (85 mi)	10.6 C (51.1 F)	1,298.4 mm (51.1 in)	0.68

Twins are stations, not cities. A twin is one of the three stations at least 100 km away whose earlier climate is closest to this station's recent one, so a close match does not mean the two places look alike in other ways. A station move or a gap in a record can change that station's averages. The list describes past climate; it is not a forecast and does not say what caused any change. How twins are found, and a search for any station.

Download the Data

Data for Olympia AP standing records by year: CSV or JSON. Field meanings are on the data page.
Data for Olympia 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 2026-10-16 (16 October 2026). Records are computed by this site and are not official.

Data as of 2026-10-16. Last revised 16 October 2026 (2026-10-16).