Hart Mtn Refuge Weather Records (USC00353692)

Record envelope, standing records and threshold days for Hart Mtn Refuge (USC00353692), Oregon, United States, with 88 years of record.

Key Facts for Hart Mtn Refuge

Hart Mtn Refuge (USC00353692) is a weather station in Oregon, United States at 42.55 latitude and -119.66 longitude, 1,712 m (5,618 ft) above sea level.
The station reports from 1939 to 2026, 88 years of record.
1,464 records set at Hart Mtn Refuge still stand.
Records are tracked for tmax, tmin, prcp, snow, snwd: an element needs 30 years of data to be eligible.
Hart Mtn Refuge tied a daily record high maximum temperature of 28.3 C (82.9 F) on 7 October 2026 (provisional).

Provisional Records

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

About the Station

Location: Oregon, United States, 42.55 latitude, -119.66 longitude.
Elevation: 1,712 m (5,618 ft).
Period of record: 1939 to 2026, 88 years.
Eligible elements: tmax, tmin, prcp, snow, snwd.

Daily Record Envelope and 2026

20 days at or beyond a record

The band shows the record high and record low for each calendar day at Hart Mtn Refuge. The lines show the 2026 daily maximum and minimum. 20 days in 2026 matched or passed a record. Temperatures are in degrees Celsius.

Daily record high and record low at Hart Mtn Refuge, with 2026 drawn through them
Month	Highest record high	Lowest record low	2026 highest maximum	2026 lowest minimum
Jan	18.9 C (66.0 F)	-33.3 C (-27.9 F)	18.3 C (64.9 F)	-13.9 C (7.0 F)
Feb	19.4 C (66.9 F)	-32.2 C (-26.0 F)	17.8 C (64.0 F)	-15.6 C (3.9 F)
Mar	25.6 C (78.1 F)	-22.2 C (-8.0 F)	25.6 C (78.1 F)	-9.4 C (15.1 F)
Apr	27.2 C (81.0 F)	-16.1 C (3.0 F)	21.7 C (71.1 F)	-11.1 C (12.0 F)
May	31.7 C (89.1 F)	-11.7 C (10.9 F)	28.3 C (82.9 F)	-3.3 C (26.1 F)
Jun	35.6 C (96.1 F)	-7.8 C (18.0 F)	30.6 C (87.1 F)	-1.7 C (28.9 F)
Jul	39.4 C (102.9 F)	-5.6 C (21.9 F)	32.8 C (91.0 F)	2.8 C (37.0 F)
Aug	36.7 C (98.1 F)	-6.1 C (21.0 F)	33.9 C (93.0 F)	1.7 C (35.1 F)
Sep	36.1 C (97.0 F)	-11.7 C (10.9 F)	n/a	n/a
Oct	31.7 C (89.1 F)	-17.8 C (0.0 F)	28.3 C (82.9 F)	7.8 C (46.0 F)
Nov	23.3 C (73.9 F)	-27.2 C (-17.0 F)	n/a	n/a
Dec	20.0 C (68.0 F)	-35.6 C (-32.1 F)	n/a	n/a

Which Years Hold Standing Records

1,464 standing records

1,464 records at Hart Mtn Refuge still stand. 2015 holds the most, with 40.

Standing records at Hart Mtn Refuge by the year they were set
Year set	Standing records
1939	19
1940	14
1941	14
1942	19
1943	12
1944	8
1945	21
1946	10
1947	13
1948	15
1949	32
1950	27
1951	10
1952	13
1953	13
1954	17
1955	33
1956	16
1957	15
1958	10
1959	11
1960	18
1961	14
1962	24
1963	23
1964	11
1965	15
1966	20
1967	16
1968	23
1969	14
1970	24
1971	22
1972	17
1973	9
1974	18
1975	23
1976	23
1977	15
1978	10
1979	12
1980	9
1981	10
1982	18
1983	18
1984	16
1985	30
1986	24
1987	25
1988	16
1989	20
1990	25
1991	6
1992	20
1993	15
1994	17
1995	18
1996	16
1997	6
1998	7
1999	11
2000	8
2001	13
2002	14
2003	20
2004	11
2005	7
2006	13
2007	8
2008	22
2009	20
2010	13
2011	8
2012	24
2013	24
2014	13
2015	40
2016	16
2017	20
2018	3
2019	12
2020	16
2021	21
2022	22
2023	12
2024	15
2025	21
2026	28

All-Time Record Progression

9 new records

9 all-time records were set at Hart Mtn Refuge between 26 April 1978 and 14 July 2024. Each dot is a new record.

When Hart Mtn Refuge set new all-time records
Date	Kind	Detail
1978-04-26	Record daily precipitation	Record daily precipitation 71.1 mm (2.8 in)
1989-02-04	Record low maximum temperature	Record low maximum temperature -21.1 C (-6.0 F)
1990-12-21	Record low minimum temperature	Record low minimum temperature -34.4 C (-29.9 F)
1990-12-22	Record low minimum temperature	Record low minimum temperature -35.6 C (-32.1 F)
1991-05-18	Record daily snowfall	Record daily snowfall 45.7 cm (18.0 in)
1991-07-06	Record high minimum temperature	Record high minimum temperature 20.0 C (68.0 F)
2002-07-10	Record high maximum temperature	Record high maximum temperature 37.8 C (100.0 F)
2002-07-11	Record high maximum temperature	Record high maximum temperature 39.4 C (102.9 F)
2024-07-14	Record high minimum temperature	Record high minimum temperature 20.6 C (69.1 F)

Wettest Day of Each Month

Apr: 71.1 mm (2.8 in)

The wettest day on record for each calendar month at Hart Mtn Refuge. The most was 71.1 mm (2.8 in) on 26 April 1978.

Record daily precipitation for each month at Hart Mtn Refuge
Month	Record daily precipitation (mm)	Date
Jan	35.6 mm (1.4 in)	15 January 2020
Feb	28.4 mm (1.1 in)	9 February 1999
Mar	25.7 mm (1.0 in)	26 March 1984
Apr	71.1 mm (2.8 in)	26 April 1978
May	59.9 mm (2.4 in)	15 May 1943
Jun	56.1 mm (2.2 in)	18 June 1975
Jul	41.9 mm (1.6 in)	12 July 2001
Aug	32.3 mm (1.3 in)	31 August 1984
Sep	34.5 mm (1.4 in)	14 September 1966
Oct	40.6 mm (1.6 in)	10 October 1962
Nov	39.6 mm (1.6 in)	13 November 1981
Dec	33.0 mm (1.3 in)	23 December 1964

Period of Record Coverage

1939 to 2026

88 years of record at Hart Mtn Refuge, 1939 to 2026. 28 years have data for under 90 percent of days and are left out of rankings: 1939, 1946, 1973, 1975, 1986, 1993, 1995, 1997 and others.

Days with data per year at Hart Mtn Refuge
Year	Days with data	Share of year	Complete
1939	245	67%	No
1940	365	100%	Yes
1941	363	99%	Yes
1942	365	100%	Yes
1943	364	100%	Yes
1944	344	94%	Yes
1945	365	100%	Yes
1946	290	79%	No
1947	359	98%	Yes
1948	366	100%	Yes
1949	363	99%	Yes
1950	362	99%	Yes
1951	363	99%	Yes
1952	363	99%	Yes
1953	361	99%	Yes
1954	344	94%	Yes
1955	363	99%	Yes
1956	365	100%	Yes
1957	359	98%	Yes
1958	365	100%	Yes
1959	362	99%	Yes
1960	355	97%	Yes
1961	358	98%	Yes
1962	359	98%	Yes
1963	354	97%	Yes
1964	365	100%	Yes
1965	364	100%	Yes
1966	364	100%	Yes
1967	360	99%	Yes
1968	366	100%	Yes
1969	359	98%	Yes
1970	362	99%	Yes
1971	357	98%	Yes
1972	355	97%	Yes
1973	319	87%	No
1974	341	93%	Yes
1975	323	88%	No
1976	357	98%	Yes
1977	356	98%	Yes
1978	340	93%	Yes
1979	338	93%	Yes
1980	353	96%	Yes
1981	355	97%	Yes
1982	337	92%	Yes
1983	353	97%	Yes
1984	350	96%	Yes
1985	358	98%	Yes
1986	328	90%	No
1987	355	97%	Yes
1988	347	95%	Yes
1989	353	97%	Yes
1990	349	96%	Yes
1991	341	93%	Yes
1992	337	92%	Yes
1993	324	89%	No
1994	339	93%	Yes
1995	285	78%	No
1996	338	92%	Yes
1997	284	78%	No
1998	217	59%	No
1999	226	62%	No
2000	168	46%	No
2001	279	76%	No
2002	277	76%	No
2003	320	88%	No
2004	286	78%	No
2005	213	58%	No
2006	192	53%	No
2007	222	61%	No
2008	287	78%	No
2009	292	80%	No
2010	272	75%	No
2011	341	93%	Yes
2012	366	100%	Yes
2013	364	100%	Yes
2014	365	100%	Yes
2015	365	100%	Yes
2016	365	100%	Yes
2017	302	83%	No
2018	33	9%	No
2019	257	70%	No
2020	340	93%	Yes
2021	353	97%	Yes
2022	191	52%	No
2023	318	87%	No
2024	330	90%	Yes
2025	326	89%	No
2026	242	66%	No

Latest Records

Latest records at Hart Mtn Refuge
Date	Station	Record	Value	Beat old record by	Old record stood	Significance
7 October 2026	Hart Mtn Refuge, US	daily high max (Tie, Provisional)	28.3 C (82.9 F)	tie	60 years	6 of 100 (Routine)
26 August 2026	Hart Mtn Refuge, US	daily high min (Tie, Provisional)	13.3 C (55.9 F)	tie	16 years	3 of 100 (Routine)
20 August 2026	Hart Mtn Refuge, US	daily high min (Tie, Provisional)	13.9 C (57.0 F)	tie	39 years	4 of 100 (Routine)
20 July 2026	Hart Mtn Refuge, US	daily high min	18.9 C (66.0 F)	2.2 C (4.0 F)	23 years	19 of 100 (Routine)
8 July 2026	Hart Mtn Refuge, US	daily high min (Tie)	13.9 C (57.0 F)	tie	8 years	2 of 100 (Routine)
13 May 2026	Hart Mtn Refuge, US	daily high max (Tie)	27.8 C (82.0 F)	tie	49 years	5 of 100 (Routine)
13 May 2026	Hart Mtn Refuge, US	daily high min (Tie)	10.0 C (50.0 F)	tie	12 years	2 of 100 (Routine)
12 May 2026	Hart Mtn Refuge, US	daily high max	28.3 C (82.9 F)	1.6 C (2.9 F)	32 years	19 of 100 (Routine)
12 May 2026	Hart Mtn Refuge, US	daily high min (Tie)	10.6 C (51.1 F)	tie	12 years	2 of 100 (Routine)
11 May 2026	Hart Mtn Refuge, US	daily high max (Tie)	28.3 C (82.9 F)	tie	24 years	3 of 100 (Routine)
10 May 2026	Hart Mtn Refuge, US	daily high max	28.3 C (82.9 F)	2.7 C (4.9 F)	85 years	37 of 100 (Notable)
29 March 2026	Hart Mtn Refuge, US	daily high min	2.8 C (37.0 F)	0.6 C (1.1 F)	68 years	29 of 100 (Routine)
25 March 2026	Hart Mtn Refuge, US	monthly high min	10.0 C (50.0 F)	0.6 C (1.1 F)	0 years	19 of 100 (Routine)
24 March 2026	Hart Mtn Refuge, US	monthly high min	9.4 C (48.9 F)	1.1 C (2.0 F)	0 years	20 of 100 (Routine)
21 March 2026	Hart Mtn Refuge, US	daily high max	24.4 C (75.9 F)	1.1 C (2.0 F)	21 years	16 of 100 (Routine)
20 March 2026	Hart Mtn Refuge, US	monthly high min	8.3 C (46.9 F)	0.5 C (0.9 F)	25 years	26 of 100 (Routine)
20 March 2026	Hart Mtn Refuge, US	monthly high max	25.6 C (78.1 F)	1.2 C (2.2 F)	0 years	20 of 100 (Routine)
19 March 2026	Hart Mtn Refuge, US	monthly high max (Tie)	24.4 C (75.9 F)	tie	0 years	4 of 100 (Routine)
18 March 2026	Hart Mtn Refuge, US	monthly high max	24.4 C (75.9 F)	0.5 C (0.9 F)	0 years	18 of 100 (Routine)
17 March 2026	Hart Mtn Refuge, US	monthly high max	23.9 C (75.0 F)	0.6 C (1.1 F)	21 years	25 of 100 (Routine)

Climate Trend

55 complete years, 1940 to 2021

One stripe for each of 55 complete years at Hart Mtn Refuge, 1940 to 2021. Blue stripes are years cooler than the station's own mean of 6.7 C (44.0 F); red stripes are warmer. The coolest year was 1948, at 4.9 C (40.8 F), and the warmest was 2015, at 8.3 C (47.0 F). The strongest colour marks a difference of 1.8 C (3.2 F).

Annual mean temperature at Hart Mtn Refuge as warming stripes, 1940 to 2021
Year	Annual mean temperature	Difference from the station mean
1940	7.8 C	+1.10 C
1941	6.8 C	+0.08 C
1942	6.2 C	-0.44 C
1943	6.9 C	+0.19 C
1945	6.3 C	-0.38 C
1947	6.9 C	+0.19 C
1948	4.9 C	-1.79 C
1950	6.7 C	+0.07 C
1951	6.2 C	-0.51 C
1952	6.5 C	-0.19 C
1953	7.0 C	+0.34 C
1955	5.2 C	-1.45 C
1956	6.2 C	-0.43 C
1957	6.1 C	-0.59 C
1958	7.6 C	+0.92 C
1959	6.8 C	+0.13 C
1960	6.3 C	-0.37 C
1961	7.1 C	+0.39 C
1962	6.6 C	-0.08 C
1963	6.8 C	+0.14 C
1964	5.5 C	-1.16 C
1965	6.2 C	-0.48 C
1966	6.9 C	+0.25 C
1967	6.9 C	+0.22 C
1968	6.8 C	+0.14 C
1969	6.3 C	-0.35 C
1970	6.5 C	-0.15 C
1971	5.9 C	-0.76 C
1972	6.2 C	-0.51 C
1974	6.2 C	-0.45 C
1976	6.7 C	+0.04 C
1977	6.9 C	+0.20 C
1978	6.3 C	-0.40 C
1980	6.9 C	+0.24 C
1981	6.8 C	+0.17 C
1982	5.1 C	-1.60 C
1983	6.0 C	-0.64 C
1984	5.9 C	-0.75 C
1985	6.0 C	-0.68 C
1987	7.4 C	+0.72 C
1988	7.2 C	+0.50 C
1989	6.2 C	-0.46 C
1990	6.9 C	+0.25 C
1992	8.2 C	+1.49 C
1993	5.6 C	-1.08 C
1994	7.3 C	+0.63 C
1996	7.3 C	+0.59 C
1997	6.9 C	+0.22 C
2003	7.9 C	+1.22 C
2012	7.2 C	+0.52 C
2013	6.9 C	+0.20 C
2014	8.1 C	+1.42 C
2015	8.3 C	+1.64 C
2016	7.4 C	+0.74 C
2021	7.5 C	+0.83 C

The annual mean temperature here has risen by 0.1 C (0.1 to 0.2) per decade over 1940 to 2021. In Fahrenheit: 0.2 F (0.1 to 0.4) per decade. The slope is a straight line fitted to 55 complete years; the brackets give its 95 percent interval.

Fitted temperature trends per decade at Hart Mtn Refuge
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 0.4) per decade	1940 to 2021	55	Rise
Mean daily maximum	0.3 C (0.2 to 0.4) per decade	0.5 F (0.3 to 0.6) per decade	1940 to 2021	55	Rise
Mean daily minimum	0.02 C (-0.08 to 0.11) per decade	0.03 F (-0.14 to 0.20) per decade	1940 to 2021	55	Not clearly different from zero

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

1939 to 2026

Yearly extremes at Hart Mtn Refuge: 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)	2002	34.4 C (93.9 F)	88
Coldest night (TNn)	-35.6 C (-32.1 F)	1990	-21.7 C (-7.1 F)	88
Wettest day (Rx1day)	71.1 mm (2.8 in)	1978	23.9 mm (0.9 in)	87
Wettest five days (Rx5day)	100.8 mm (4.0 in)	2005	37.8 mm (1.5 in)	87
Longest dry spell (CDD)	108 days	2012	42 days	87

Hottest day (TXx)

The hottest day of the year at Hart Mtn Refuge, 1939 to 2026. The record is 39.4 C (102.9 F) in 2002, marked on the chart; the median year is 34.4 C (93.9 F).

Hottest day (TXx) at Hart Mtn Refuge by year
Year	Hottest day (TXx)
1939	34.4 C (93.9 F)
1940	35.6 C (96.1 F)
1941	34.4 C (93.9 F)
1942	33.3 C (91.9 F)
1943	33.9 C (93.0 F)
1944	32.2 C (90.0 F)
1945	32.8 C (91.0 F)
1946	36.7 C (98.1 F)
1947	32.2 C (90.0 F)
1948	31.7 C (89.1 F)
1949	33.3 C (91.9 F)
1950	36.1 C (97.0 F)
1951	34.4 C (93.9 F)
1952	32.8 C (91.0 F)
1953	35.0 C (95.0 F)
1954	33.9 C (93.0 F)
1955	35.0 C (95.0 F)
1956	31.7 C (89.1 F)
1957	32.2 C (90.0 F)
1958	31.7 C (89.1 F)
1959	34.4 C (93.9 F)
1960	36.1 C (97.0 F)
1961	36.1 C (97.0 F)
1962	35.0 C (95.0 F)
1963	32.2 C (90.0 F)
1964	34.4 C (93.9 F)
1965	31.1 C (88.0 F)
1966	34.4 C (93.9 F)
1967	34.4 C (93.9 F)
1968	34.4 C (93.9 F)
1969	33.9 C (93.0 F)
1970	33.3 C (91.9 F)
1971	33.9 C (93.0 F)
1972	36.7 C (98.1 F)
1973	32.8 C (91.0 F)
1974	32.2 C (90.0 F)
1975	33.3 C (91.9 F)
1976	36.1 C (97.0 F)
1977	33.3 C (91.9 F)
1978	35.0 C (95.0 F)
1979	33.9 C (93.0 F)
1980	35.0 C (95.0 F)
1981	34.4 C (93.9 F)
1982	32.2 C (90.0 F)
1983	34.4 C (93.9 F)
1984	33.9 C (93.0 F)
1985	33.3 C (91.9 F)
1986	36.7 C (98.1 F)
1987	35.6 C (96.1 F)
1988	34.4 C (93.9 F)
1989	36.7 C (98.1 F)
1990	35.6 C (96.1 F)
1991	32.2 C (90.0 F)
1992	35.0 C (95.0 F)
1993	33.3 C (91.9 F)
1994	33.9 C (93.0 F)
1995	32.8 C (91.0 F)
1996	35.0 C (95.0 F)
1997	34.4 C (93.9 F)
1998	35.0 C (95.0 F)
1999	33.3 C (91.9 F)
2000	35.0 C (95.0 F)
2001	36.7 C (98.1 F)
2002	39.4 C (102.9 F)
2003	39.4 C (102.9 F)
2004	35.0 C (95.0 F)
2005	35.0 C (95.0 F)
2006	35.6 C (96.1 F)
2007	38.3 C (100.9 F)
2008	34.4 C (93.9 F)
2009	35.6 C (96.1 F)
2010	34.4 C (93.9 F)
2011	32.2 C (90.0 F)
2012	35.0 C (95.0 F)
2013	36.7 C (98.1 F)
2014	36.1 C (97.0 F)
2015	36.1 C (97.0 F)
2016	34.4 C (93.9 F)
2017	35.0 C (95.0 F)
2018	16.1 C (61.0 F)
2019	32.2 C (90.0 F)
2020	35.6 C (96.1 F)
2021	35.0 C (95.0 F)
2022	31.7 C (89.1 F)
2023	33.9 C (93.0 F)
2024	35.6 C (96.1 F)
2025	33.3 C (91.9 F)
2026	33.9 C (93.0 F)

Coldest night (TNn)

The coldest night of the year at Hart Mtn Refuge, 1939 to 2026. The record is -35.6 C (-32.1 F) in 1990, marked on the chart; the median year is -21.7 C (-7.1 F).

Coldest night (TNn) at Hart Mtn Refuge by year
Year	Coldest night (TNn)
1939	-15.6 C (3.9 F)
1940	-20.6 C (-5.1 F)
1941	-18.9 C (-2.0 F)
1942	-30.0 C (-22.0 F)
1943	-25.0 C (-13.0 F)
1944	-18.3 C (-0.9 F)
1945	-21.7 C (-7.1 F)
1946	-21.1 C (-6.0 F)
1947	-24.4 C (-11.9 F)
1948	-23.3 C (-9.9 F)
1949	-30.6 C (-23.1 F)
1950	-28.3 C (-18.9 F)
1951	-24.4 C (-11.9 F)
1952	-21.1 C (-6.0 F)
1953	-13.3 C (8.1 F)
1954	-22.8 C (-9.0 F)
1955	-23.3 C (-9.9 F)
1956	-26.1 C (-15.0 F)
1957	-26.7 C (-16.1 F)
1958	-16.7 C (1.9 F)
1959	-20.0 C (-4.0 F)
1960	-23.9 C (-11.0 F)
1961	-25.0 C (-13.0 F)
1962	-33.3 C (-27.9 F)
1963	-26.1 C (-15.0 F)
1964	-23.9 C (-11.0 F)
1965	-23.3 C (-9.9 F)
1966	-19.4 C (-2.9 F)
1967	-24.4 C (-11.9 F)
1968	-17.8 C (0.0 F)
1969	-20.0 C (-4.0 F)
1970	-23.3 C (-9.9 F)
1971	-21.7 C (-7.1 F)
1972	-32.2 C (-26.0 F)
1973	-21.1 C (-6.0 F)
1974	-24.4 C (-11.9 F)
1975	-18.3 C (-0.9 F)
1976	-25.6 C (-14.1 F)
1977	-22.8 C (-9.0 F)
1978	-25.0 C (-13.0 F)
1979	-27.2 C (-17.0 F)
1980	-25.0 C (-13.0 F)
1981	-17.8 C (0.0 F)
1982	-21.7 C (-7.1 F)
1983	-28.3 C (-18.9 F)
1984	-21.1 C (-6.0 F)
1985	-32.2 C (-26.0 F)
1986	-16.7 C (1.9 F)
1987	-21.7 C (-7.1 F)
1988	-21.1 C (-6.0 F)
1989	-32.2 C (-26.0 F)
1990	-35.6 C (-32.1 F)
1991	-17.8 C (0.0 F)
1992	-18.3 C (-0.9 F)
1993	-27.2 C (-17.0 F)
1994	-17.8 C (0.0 F)
1995	-18.9 C (-2.0 F)
1996	-23.9 C (-11.0 F)
1997	-21.1 C (-6.0 F)
1998	-28.9 C (-20.0 F)
1999	-20.6 C (-5.1 F)
2000	-15.6 C (3.9 F)
2001	-18.9 C (-2.0 F)
2002	-19.4 C (-2.9 F)
2003	-17.8 C (0.0 F)
2004	-18.9 C (-2.0 F)
2005	-18.9 C (-2.0 F)
2006	-21.1 C (-6.0 F)
2007	-19.4 C (-2.9 F)
2008	-24.4 C (-11.9 F)
2009	-26.7 C (-16.1 F)
2010	-19.4 C (-2.9 F)
2011	-26.7 C (-16.1 F)
2012	-21.7 C (-7.1 F)
2013	-28.9 C (-20.0 F)
2014	-19.4 C (-2.9 F)
2015	-18.9 C (-2.0 F)
2016	-25.6 C (-14.1 F)
2017	-29.4 C (-20.9 F)
2018	-17.2 C (1.0 F)
2019	-20.0 C (-4.0 F)
2020	-16.7 C (1.9 F)
2021	-20.0 C (-4.0 F)
2022	-21.1 C (-6.0 F)
2023	-25.6 C (-14.1 F)
2024	-17.8 C (0.0 F)
2025	-25.0 C (-13.0 F)
2026	-15.6 C (3.9 F)

Wettest day (Rx1day)

The wettest day of the year at Hart Mtn Refuge, 1939 to 2026. The record is 71.1 mm (2.8 in) in 1978, marked on the chart; the median year is 23.9 mm (0.9 in).

Wettest day (Rx1day) at Hart Mtn Refuge by year
Year	Wettest day (Rx1day)
1939	17.5 mm (0.7 in)
1940	19.6 mm (0.8 in)
1941	35.6 mm (1.4 in)
1942	13.7 mm (0.5 in)
1943	59.9 mm (2.4 in)
1944	21.8 mm (0.9 in)
1945	16.0 mm (0.6 in)
1946	20.8 mm (0.8 in)
1947	24.1 mm (0.9 in)
1948	34.8 mm (1.4 in)
1949	15.2 mm (0.6 in)
1950	15.5 mm (0.6 in)
1951	14.2 mm (0.6 in)
1952	25.7 mm (1.0 in)
1953	24.4 mm (1.0 in)
1954	30.0 mm (1.2 in)
1955	18.3 mm (0.7 in)
1956	23.4 mm (0.9 in)
1957	29.5 mm (1.2 in)
1958	34.0 mm (1.3 in)
1959	18.3 mm (0.7 in)
1960	20.6 mm (0.8 in)
1961	15.0 mm (0.6 in)
1962	40.6 mm (1.6 in)
1963	24.6 mm (1.0 in)
1964	33.0 mm (1.3 in)
1965	21.6 mm (0.9 in)
1966	34.5 mm (1.4 in)
1967	10.9 mm (0.4 in)
1968	18.5 mm (0.7 in)
1969	26.9 mm (1.1 in)
1970	25.1 mm (1.0 in)
1971	21.6 mm (0.9 in)
1972	21.8 mm (0.9 in)
1973	19.6 mm (0.8 in)
1974	11.4 mm (0.4 in)
1975	56.1 mm (2.2 in)
1976	11.7 mm (0.5 in)
1977	18.8 mm (0.7 in)
1978	71.1 mm (2.8 in)
1979	27.9 mm (1.1 in)
1980	16.8 mm (0.7 in)
1981	39.6 mm (1.6 in)
1982	19.6 mm (0.8 in)
1983	31.0 mm (1.2 in)
1984	32.3 mm (1.3 in)
1985	20.1 mm (0.8 in)
1986	23.1 mm (0.9 in)
1987	24.9 mm (1.0 in)
1988	27.9 mm (1.1 in)
1989	13.7 mm (0.5 in)
1990	21.3 mm (0.8 in)
1991	49.5 mm (1.9 in)
1992	22.6 mm (0.9 in)
1993	25.1 mm (1.0 in)
1994	18.5 mm (0.7 in)
1995	36.6 mm (1.4 in)
1996	26.7 mm (1.1 in)
1997	14.2 mm (0.6 in)
1998	20.3 mm (0.8 in)
1999	28.4 mm (1.1 in)
2000	33.8 mm (1.3 in)
2001	41.9 mm (1.6 in)
2002	13.0 mm (0.5 in)
2003	33.3 mm (1.3 in)
2004	23.9 mm (0.9 in)
2005	53.1 mm (2.1 in)
2006	22.1 mm (0.9 in)
2007	17.8 mm (0.7 in)
2008	15.0 mm (0.6 in)
2009	33.0 mm (1.3 in)
2010	38.6 mm (1.5 in)
2011	25.4 mm (1.0 in)
2012	17.8 mm (0.7 in)
2013	20.8 mm (0.8 in)
2014	24.1 mm (0.9 in)
2015	24.6 mm (1.0 in)
2016	31.2 mm (1.2 in)
2017	24.9 mm (1.0 in)
2018	n/a
2019	27.9 mm (1.1 in)
2020	35.6 mm (1.4 in)
2021	14.0 mm (0.6 in)
2022	17.8 mm (0.7 in)
2023	39.4 mm (1.6 in)
2024	12.4 mm (0.5 in)
2025	30.5 mm (1.2 in)
2026	22.6 mm (0.9 in)

Wettest five days (Rx5day)

The wettest five days of the year at Hart Mtn Refuge, 1939 to 2026. The record is 100.8 mm (4.0 in) in 2005, marked on the chart; the median year is 37.8 mm (1.5 in).

Wettest five days (Rx5day) at Hart Mtn Refuge by year
Year	Wettest five days (Rx5day)
1939	35.8 mm (1.4 in)
1940	37.9 mm (1.5 in)
1941	50.8 mm (2.0 in)
1942	31.2 mm (1.2 in)
1943	59.9 mm (2.4 in)
1944	42.4 mm (1.7 in)
1945	38.4 mm (1.5 in)
1946	29.2 mm (1.1 in)
1947	32.0 mm (1.3 in)
1948	66.2 mm (2.6 in)
1949	23.3 mm (0.9 in)
1950	23.2 mm (0.9 in)
1951	37.8 mm (1.5 in)
1952	30.5 mm (1.2 in)
1953	37.1 mm (1.5 in)
1954	42.2 mm (1.7 in)
1955	25.6 mm (1.0 in)
1956	51.4 mm (2.0 in)
1957	65.0 mm (2.6 in)
1958	38.1 mm (1.5 in)
1959	27.0 mm (1.1 in)
1960	32.8 mm (1.3 in)
1961	16.0 mm (0.6 in)
1962	96.2 mm (3.8 in)
1963	33.2 mm (1.3 in)
1964	72.1 mm (2.8 in)
1965	55.6 mm (2.2 in)
1966	42.4 mm (1.7 in)
1967	15.7 mm (0.6 in)
1968	37.8 mm (1.5 in)
1969	52.3 mm (2.1 in)
1970	26.9 mm (1.1 in)
1971	40.9 mm (1.6 in)
1972	29.1 mm (1.1 in)
1973	26.9 mm (1.1 in)
1974	20.9 mm (0.8 in)
1975	91.7 mm (3.6 in)
1976	24.4 mm (1.0 in)
1977	29.0 mm (1.1 in)
1978	99.0 mm (3.9 in)
1979	39.1 mm (1.5 in)
1980	32.4 mm (1.3 in)
1981	53.1 mm (2.1 in)
1982	29.9 mm (1.2 in)
1983	49.2 mm (1.9 in)
1984	42.2 mm (1.7 in)
1985	32.3 mm (1.3 in)
1986	37.1 mm (1.5 in)
1987	45.7 mm (1.8 in)
1988	36.8 mm (1.4 in)
1989	16.5 mm (0.6 in)
1990	26.2 mm (1.0 in)
1991	80.0 mm (3.1 in)
1992	44.9 mm (1.8 in)
1993	42.2 mm (1.7 in)
1994	38.8 mm (1.5 in)
1995	47.8 mm (1.9 in)
1996	43.2 mm (1.7 in)
1997	40.6 mm (1.6 in)
1998	24.9 mm (1.0 in)
1999	51.5 mm (2.0 in)
2000	41.4 mm (1.6 in)
2001	45.7 mm (1.8 in)
2002	23.0 mm (0.9 in)
2003	45.1 mm (1.8 in)
2004	28.5 mm (1.1 in)
2005	100.8 mm (4.0 in)
2006	22.1 mm (0.9 in)
2007	23.1 mm (0.9 in)
2008	33.5 mm (1.3 in)
2009	40.9 mm (1.6 in)
2010	38.9 mm (1.5 in)
2011	37.0 mm (1.5 in)
2012	30.1 mm (1.2 in)
2013	42.2 mm (1.7 in)
2014	38.6 mm (1.5 in)
2015	48.3 mm (1.9 in)
2016	45.9 mm (1.8 in)
2017	31.3 mm (1.2 in)
2018	n/a
2019	35.8 mm (1.4 in)
2020	66.1 mm (2.6 in)
2021	0.8 mm (0.03 in)
2022	20.5 mm (0.8 in)
2023	52.6 mm (2.1 in)
2024	12.4 mm (0.5 in)
2025	16.5 mm (0.6 in)
2026	11.6 mm (0.5 in)

Longest dry spell (CDD)

The longest dry spell of the year at Hart Mtn Refuge, 1939 to 2026. The record is 108 days in 2012, marked on the chart; the median year is 42 days.

Longest dry spell (CDD) at Hart Mtn Refuge by year
Year	Longest dry spell (CDD)
1939	42 days
1940	46 days
1941	18 days
1942	61 days
1943	75 days
1944	34 days
1945	71 days
1946	23 days
1947	78 days
1948	32 days
1949	59 days
1950	45 days
1951	59 days
1952	61 days
1953	49 days
1954	49 days
1955	65 days
1956	39 days
1957	63 days
1958	24 days
1959	53 days
1960	67 days
1961	39 days
1962	61 days
1963	31 days
1964	43 days
1965	28 days
1966	40 days
1967	40 days
1968	44 days
1969	45 days
1970	67 days
1971	46 days
1972	70 days
1973	36 days
1974	83 days
1975	20 days
1976	67 days
1977	38 days
1978	41 days
1979	28 days
1980	42 days
1981	80 days
1982	32 days
1983	35 days
1984	33 days
1985	57 days
1986	40 days
1987	67 days
1988	40 days
1989	30 days
1990	40 days
1991	80 days
1992	42 days
1993	44 days
1994	68 days
1995	39 days
1996	26 days
1997	24 days
1998	40 days
1999	40 days
2000	55 days
2001	36 days
2002	59 days
2003	30 days
2004	26 days
2005	81 days
2006	51 days
2007	49 days
2008	59 days
2009	57 days
2010	33 days
2011	80 days
2012	108 days
2013	34 days
2014	33 days
2015	38 days
2016	55 days
2017	86 days
2018	n/a
2019	81 days
2020	16 days
2021	5 days
2022	41 days
2023	50 days
2024	34 days
2025	31 days
2026	36 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

55 years with a frost

Across 55 years with a frost, the median last spring frost at Hart Mtn Refuge falls on 26 June and the median first autumn frost on 21 July, which leaves a median of 37 days between them.

Fitted over all years, the growing season changes by +2.9 days per decade at this station.

Frost dates and growing season at Hart Mtn Refuge
Measure	Median, all years	Earliest period	Recent period (1969 to 2021)	Recent against earliest	Fitted trend
Last spring frost	26 June	n/a	25 June	n/a	-0.7 days per decade
First autumn frost	21 July	n/a	22 July	n/a	+2.2 days per decade
Growing days	37 days	n/a	38 days	n/a	+2.9 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

66 years, 1940 to 2016

A day with at least 23.2 mm (0.9 in) of rain is expected about once in 2 years. A day with at least 66.3 mm (2.6 in) of rain is expected about once in 100 years.

Rainfall return levels at Hart Mtn Refuge: the daily rain expected about once in a given number of years
Expected about once in	A day with at least	Note
2 years	23.2 mm (0.9 in)
5 years	32.4 mm (1.3 in)
10 years	39.3 mm (1.5 in)
25 years	49.2 mm (1.9 in)
50 years	57.3 mm (2.3 in)
100 years	66.3 mm (2.6 in)	Longer than the 66 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, 66 years of values from 1940 to 2016.

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: 71.1 mm (2.8 in) in 1978; 59.9 mm (2.4 in) in 1943; 56.1 mm (2.2 in) in 1975.

Station Changes

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

Download the Data

Data for Hart Mtn Refuge standing records by year: CSV or JSON. Field meanings are on the data page.
Data for Hart Mtn Refuge 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 2026-10-14. Last revised 14 October 2026 (2026-10-14).