Harney Branch Exp STN Weather Records (USC00353659)

Record envelope, standing records and threshold days for Harney Branch Exp STN (USC00353659), Oregon, United States, with 33 years of record.

Key Facts for Harney Branch Exp STN

Harney Branch Exp STN (USC00353659) is a weather station in Oregon, United States at 43.58 latitude and -118.93 longitude, 1,263 m (4,144 ft) above sea level.
The station reports from 1922 to 1954, 33 years of record.
1,464 records set at Harney Branch Exp STN still stand.
Records are tracked for tmax, tmin, prcp, snow: an element needs 30 years of data to be eligible.
Harney Branch Exp STN set a daily record low minimum temperature of -9.4 C (15.1 F) on 29 September 1954.

About the Station

Location: Oregon, United States, 43.58 latitude, -118.93 longitude.
Elevation: 1,263 m (4,144 ft).
Period of record: 1922 to 1954, 33 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 Harney Branch Exp STN. 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 Harney Branch Exp STN, with 2026 drawn through them
Month	Highest record high	Lowest record low	2026 highest maximum	2026 lowest minimum
Jan	13.9 C (57.0 F)	-42.8 C (-45.0 F)	n/a	n/a
Feb	19.4 C (66.9 F)	-37.8 C (-36.0 F)	n/a	n/a
Mar	24.4 C (75.9 F)	-20.6 C (-5.1 F)	n/a	n/a
Apr	30.0 C (86.0 F)	-12.8 C (9.0 F)	n/a	n/a
May	33.3 C (91.9 F)	-12.2 C (10.0 F)	n/a	n/a
Jun	38.9 C (102.0 F)	-7.2 C (19.0 F)	n/a	n/a
Jul	40.6 C (105.1 F)	-4.4 C (24.1 F)	n/a	n/a
Aug	38.3 C (100.9 F)	-6.1 C (21.0 F)	n/a	n/a
Sep	37.2 C (99.0 F)	-16.7 C (1.9 F)	n/a	n/a
Oct	30.6 C (87.1 F)	-16.1 C (3.0 F)	n/a	n/a
Nov	21.1 C (70.0 F)	-26.1 C (-15.0 F)	n/a	n/a
Dec	16.1 C (61.0 F)	-42.8 C (-45.0 F)	n/a	n/a

Which Years Hold Standing Records

1,464 standing records

1,464 records at Harney Branch Exp STN still stand. 1934 holds the most, with 80.

Standing records at Harney Branch Exp STN by the year they were set
Year set	Standing records
1922	37
1923	39
1924	79
1925	41
1926	55
1927	54
1928	33
1929	56
1930	53
1931	54
1932	67
1933	69
1934	80
1935	41
1936	58
1937	51
1938	39
1939	52
1940	42
1941	33
1942	35
1943	29
1944	31
1945	26
1946	20
1947	35
1948	10
1949	59
1950	47
1951	25
1952	43
1953	28
1954	43

Wettest Day of Each Month

Jun: 40.1 mm (1.6 in)

The wettest day on record for each calendar month at Harney Branch Exp STN. The most was 40.1 mm (1.6 in) on 8 June 1927.

Record daily precipitation for each month at Harney Branch Exp STN
Month	Record daily precipitation (mm)	Date
Jan	22.9 mm (0.9 in)	9 January 1936
Feb	23.1 mm (0.9 in)	16 February 1947
Mar	18.5 mm (0.7 in)	26 March 1940
Apr	16.0 mm (0.6 in)	15 April 1935
May	24.4 mm (1.0 in)	16 May 1925
Jun	40.1 mm (1.6 in)	8 June 1927
Jul	10.4 mm (0.4 in)	23 July 1936
Aug	22.9 mm (0.9 in)	3 August 1922
Sep	22.4 mm (0.9 in)	4 September 1940
Oct	24.9 mm (1.0 in)	6 October 1925
Nov	26.7 mm (1.1 in)	19 November 1937
Dec	31.2 mm (1.2 in)	3 December 1950

Period of Record Coverage

1922 to 1954

33 years of record at Harney Branch Exp STN, 1922 to 1954. 5 years have data for under 90 percent of days and are left out of rankings: 1922, 1925, 1928, 1948, 1954.

Days with data per year at Harney Branch Exp STN
Year	Days with data	Share of year	Complete
1922	181	50%	No
1923	361	99%	Yes
1924	360	98%	Yes
1925	308	84%	No
1926	359	98%	Yes
1927	343	94%	Yes
1928	275	75%	No
1929	362	99%	Yes
1930	351	96%	Yes
1931	356	98%	Yes
1932	358	98%	Yes
1933	365	100%	Yes
1934	362	99%	Yes
1935	362	99%	Yes
1936	361	99%	Yes
1937	365	100%	Yes
1938	365	100%	Yes
1939	363	99%	Yes
1940	366	100%	Yes
1941	365	100%	Yes
1942	361	99%	Yes
1943	360	99%	Yes
1944	365	100%	Yes
1945	365	100%	Yes
1946	363	99%	Yes
1947	363	99%	Yes
1948	182	50%	No
1949	358	98%	Yes
1950	360	99%	Yes
1951	362	99%	Yes
1952	358	98%	Yes
1953	354	97%	Yes
1954	259	71%	No

Latest Records

Latest records at Harney Branch Exp STN
Date	Station	Record	Value	Beat old record by	Old record stood	Significance
29 September 1954	Harney Branch Exp STN, US	daily low min	-9.4 C (15.1 F)	2.2 C (4.0 F)	32 years	16 of 100 (Routine)
27 September 1954	Harney Branch Exp STN, US	daily high max (Tie)	28.3 C (82.9 F)	tie	12 years	1 of 100 (Routine)
26 September 1954	Harney Branch Exp STN, US	daily high max	31.1 C (88.0 F)	1.7 C (3.1 F)	4 years	6 of 100 (Routine)
15 September 1954	Harney Branch Exp STN, US	daily rain	2.3 mm (0.09 in)	2.3 mm (0.09 in)	32 years	18 of 100 (Routine)
26 August 1954	Harney Branch Exp STN, US	daily low max	18.3 C (64.9 F)	3.9 C (7.0 F)	0 years	12 of 100 (Routine)
25 August 1954	Harney Branch Exp STN, US	daily low max	16.1 C (61.0 F)	5.0 C (9.0 F)	0 years	15 of 100 (Routine)
24 August 1954	Harney Branch Exp STN, US	daily low max	19.4 C (66.9 F)	1.2 C (2.2 F)	12 years	9 of 100 (Routine)
21 August 1954	Harney Branch Exp STN, US	daily low max	20.6 C (69.1 F)	1.6 C (2.9 F)	32 years	16 of 100 (Routine)
20 August 1954	Harney Branch Exp STN, US	daily low max	17.8 C (64.0 F)	5.5 C (9.9 F)	28 years	24 of 100 (Routine)
20 August 1954	Harney Branch Exp STN, US	daily rain	3.8 mm (0.15 in)	3.8 mm (0.15 in)	32 years	20 of 100 (Routine)
17 August 1954	Harney Branch Exp STN, US	daily low min	-1.1 C (30.0 F)	1.1 C (2.0 F)	29 years	14 of 100 (Routine)
16 August 1954	Harney Branch Exp STN, US	daily low max	22.2 C (72.0 F)	0.6 C (1.1 F)	29 years	12 of 100 (Routine)
1 August 1954	Harney Branch Exp STN, US	daily high max (Tie)	34.4 C (93.9 F)	tie	3 years	0 of 100 (Routine)
22 July 1954	Harney Branch Exp STN, US	daily low min	-2.8 C (27.0 F)	1.1 C (2.0 F)	20 years	12 of 100 (Routine)
21 July 1954	Harney Branch Exp STN, US	daily low min	1.1 C (34.0 F)	1.1 C (2.0 F)	29 years	14 of 100 (Routine)
21 July 1954	Harney Branch Exp STN, US	daily low max	23.3 C (73.9 F)	0.6 C (1.1 F)	20 years	10 of 100 (Routine)
2 July 1954	Harney Branch Exp STN, US	daily low min	-2.8 C (27.0 F)	0.6 C (1.1 F)	9 years	6 of 100 (Routine)
16 June 1954	Harney Branch Exp STN, US	daily low min (Tie)	-2.2 C (28.0 F)	tie	28 years	2 of 100 (Routine)
10 June 1954	Harney Branch Exp STN, US	daily low max (Tie)	16.1 C (61.0 F)	tie	1 year	0 of 100 (Routine)
9 June 1954	Harney Branch Exp STN, US	daily low max	12.2 C (54.0 F)	3.4 C (6.1 F)	9 years	11 of 100 (Routine)

Climate Trend

27 complete years, 1923 to 1953

One stripe for each of 27 complete years at Harney Branch Exp STN, 1923 to 1953. Blue stripes are years cooler than the station's own mean of 6.8 C (44.2 F); red stripes are warmer. The coolest year was 1929, at 5.7 C (42.3 F), and the warmest was 1934, at 8.9 C (48.0 F). The strongest colour marks a difference of 2.1 C (3.8 F).

Annual mean temperature at Harney Branch Exp STN as warming stripes, 1923 to 1953
Year	Annual mean temperature	Difference from the station mean
1923	6.7 C	-0.13 C
1924	6.4 C	-0.43 C
1926	7.8 C	+1.01 C
1927	6.4 C	-0.36 C
1929	5.7 C	-1.08 C
1931	6.8 C	0.00 C
1932	5.7 C	-1.06 C
1933	6.1 C	-0.68 C
1934	8.9 C	+2.10 C
1935	6.0 C	-0.81 C
1936	6.5 C	-0.31 C
1937	6.4 C	-0.36 C
1938	7.2 C	+0.46 C
1939	7.6 C	+0.82 C
1940	8.3 C	+1.47 C
1941	7.4 C	+0.62 C
1942	6.4 C	-0.35 C
1943	7.1 C	+0.34 C
1944	6.4 C	-0.42 C
1945	7.1 C	+0.30 C
1946	6.6 C	-0.17 C
1947	7.5 C	+0.67 C
1949	6.3 C	-0.52 C
1950	6.8 C	-0.01 C
1951	6.4 C	-0.43 C
1952	5.8 C	-1.01 C
1953	7.2 C	+0.46 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

1922 to 1954

Yearly extremes at Harney Branch Exp STN: the record and the median year
Measure	Record	Year of the record	Median year	Years with a value
Hottest day (TXx)	40.6 C (105.1 F)	1931	37.2 C (99.0 F)	33
Coldest night (TNn)	-42.8 C (-45.0 F)	1924	-28.3 C (-18.9 F)	33
Wettest day (Rx1day)	40.1 mm (1.6 in)	1927	16.8 mm (0.7 in)	33
Wettest five days (Rx5day)	50.2 mm (2.0 in)	1950	30.0 mm (1.2 in)	33
Longest dry spell (CDD)	113 days	1929	61 days	33

Hottest day (TXx)

The hottest day of the year at Harney Branch Exp STN, 1922 to 1954. The record is 40.6 C (105.1 F) in 1931, marked on the chart; the median year is 37.2 C (99.0 F).

Hottest day (TXx) at Harney Branch Exp STN by year
Year	Hottest day (TXx)
1922	36.7 C (98.1 F)
1923	37.2 C (99.0 F)
1924	38.9 C (102.0 F)
1925	38.9 C (102.0 F)
1926	37.8 C (100.0 F)
1927	35.6 C (96.1 F)
1928	38.3 C (100.9 F)
1929	37.2 C (99.0 F)
1930	37.2 C (99.0 F)
1931	40.6 C (105.1 F)
1932	37.2 C (99.0 F)
1933	38.9 C (102.0 F)
1934	40.0 C (104.0 F)
1935	39.4 C (102.9 F)
1936	38.9 C (102.0 F)
1937	36.7 C (98.1 F)
1938	37.2 C (99.0 F)
1939	38.9 C (102.0 F)
1940	37.8 C (100.0 F)
1941	36.1 C (97.0 F)
1942	37.2 C (99.0 F)
1943	36.1 C (97.0 F)
1944	36.1 C (97.0 F)
1945	37.2 C (99.0 F)
1946	38.9 C (102.0 F)
1947	35.0 C (95.0 F)
1948	33.9 C (93.0 F)
1949	36.7 C (98.1 F)
1950	37.2 C (99.0 F)
1951	36.7 C (98.1 F)
1952	33.3 C (91.9 F)
1953	36.1 C (97.0 F)
1954	36.1 C (97.0 F)

Coldest night (TNn)

The coldest night of the year at Harney Branch Exp STN, 1922 to 1954. The record is -42.8 C (-45.0 F) in 1924, marked on the chart; the median year is -28.3 C (-18.9 F).

Coldest night (TNn) at Harney Branch Exp STN by year
Year	Coldest night (TNn)
1922	-26.1 C (-15.0 F)
1923	-32.2 C (-26.0 F)
1924	-42.8 C (-45.0 F)
1925	-23.3 C (-9.9 F)
1926	-24.4 C (-11.9 F)
1927	-37.8 C (-36.0 F)
1928	-23.9 C (-11.0 F)
1929	-31.1 C (-24.0 F)
1930	-42.8 C (-45.0 F)
1931	-25.0 C (-13.0 F)
1932	-31.7 C (-25.1 F)
1933	-37.8 C (-36.0 F)
1934	-18.3 C (-0.9 F)
1935	-30.6 C (-23.1 F)
1936	-30.6 C (-23.1 F)
1937	-41.1 C (-42.0 F)
1938	-24.4 C (-11.9 F)
1939	-28.3 C (-18.9 F)
1940	-19.4 C (-2.9 F)
1941	-18.3 C (-0.9 F)
1942	-30.6 C (-23.1 F)
1943	-28.3 C (-18.9 F)
1944	-27.2 C (-17.0 F)
1945	-22.2 C (-8.0 F)
1946	-24.4 C (-11.9 F)
1947	-27.8 C (-18.0 F)
1948	-28.9 C (-20.0 F)
1949	-33.9 C (-29.0 F)
1950	-32.2 C (-26.0 F)
1951	-27.2 C (-17.0 F)
1952	-28.9 C (-20.0 F)
1953	-16.1 C (3.0 F)
1954	-17.8 C (0.0 F)

Wettest day (Rx1day)

The wettest day of the year at Harney Branch Exp STN, 1922 to 1954. The record is 40.1 mm (1.6 in) in 1927, marked on the chart; the median year is 16.8 mm (0.7 in).

Wettest day (Rx1day) at Harney Branch Exp STN by year
Year	Wettest day (Rx1day)
1922	22.9 mm (0.9 in)
1923	16.3 mm (0.6 in)
1924	18.0 mm (0.7 in)
1925	24.9 mm (1.0 in)
1926	12.7 mm (0.5 in)
1927	40.1 mm (1.6 in)
1928	15.5 mm (0.6 in)
1929	16.5 mm (0.6 in)
1930	15.2 mm (0.6 in)
1931	16.3 mm (0.6 in)
1932	11.7 mm (0.5 in)
1933	16.8 mm (0.7 in)
1934	16.8 mm (0.7 in)
1935	16.0 mm (0.6 in)
1936	22.9 mm (0.9 in)
1937	26.7 mm (1.1 in)
1938	12.2 mm (0.5 in)
1939	10.9 mm (0.4 in)
1940	24.9 mm (1.0 in)
1941	22.1 mm (0.9 in)
1942	17.8 mm (0.7 in)
1943	9.1 mm (0.36 in)
1944	25.9 mm (1.0 in)
1945	20.3 mm (0.8 in)
1946	16.0 mm (0.6 in)
1947	23.1 mm (0.9 in)
1948	14.7 mm (0.6 in)
1949	6.6 mm (0.26 in)
1950	31.2 mm (1.2 in)
1951	20.6 mm (0.8 in)
1952	16.5 mm (0.6 in)
1953	20.8 mm (0.8 in)
1954	12.2 mm (0.5 in)

Wettest five days (Rx5day)

The wettest five days of the year at Harney Branch Exp STN, 1922 to 1954. The record is 50.2 mm (2.0 in) in 1950, marked on the chart; the median year is 30.0 mm (1.2 in).

Wettest five days (Rx5day) at Harney Branch Exp STN by year
Year	Wettest five days (Rx5day)
1922	25.7 mm (1.0 in)
1923	29.9 mm (1.2 in)
1924	33.5 mm (1.3 in)
1925	42.5 mm (1.7 in)
1926	31.0 mm (1.2 in)
1927	40.6 mm (1.6 in)
1928	25.8 mm (1.0 in)
1929	33.3 mm (1.3 in)
1930	19.8 mm (0.8 in)
1931	23.0 mm (0.9 in)
1932	30.7 mm (1.2 in)
1933	26.2 mm (1.0 in)
1934	25.0 mm (1.0 in)
1935	22.6 mm (0.9 in)
1936	38.7 mm (1.5 in)
1937	47.0 mm (1.9 in)
1938	28.0 mm (1.1 in)
1939	23.6 mm (0.9 in)
1940	41.7 mm (1.6 in)
1941	29.6 mm (1.2 in)
1942	41.4 mm (1.6 in)
1943	22.1 mm (0.9 in)
1944	39.6 mm (1.6 in)
1945	47.8 mm (1.9 in)
1946	28.0 mm (1.1 in)
1947	42.7 mm (1.7 in)
1948	18.2 mm (0.7 in)
1949	12.4 mm (0.5 in)
1950	50.2 mm (2.0 in)
1951	37.1 mm (1.5 in)
1952	30.0 mm (1.2 in)
1953	36.2 mm (1.4 in)
1954	17.3 mm (0.7 in)

Longest dry spell (CDD)

The longest dry spell of the year at Harney Branch Exp STN, 1922 to 1954. The record is 113 days in 1929, marked on the chart; the median year is 61 days.

Longest dry spell (CDD) at Harney Branch Exp STN by year
Year	Longest dry spell (CDD)
1922	58 days
1923	69 days
1924	97 days
1925	36 days
1926	39 days
1927	34 days
1928	61 days
1929	113 days
1930	94 days
1931	82 days
1932	85 days
1933	36 days
1934	63 days
1935	41 days
1936	90 days
1937	32 days
1938	27 days
1939	68 days
1940	35 days
1941	29 days
1942	61 days
1943	49 days
1944	54 days
1945	92 days
1946	29 days
1947	64 days
1948	26 days
1949	78 days
1950	61 days
1951	55 days
1952	68 days
1953	69 days
1954	45 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

27 years with a frost

Across 27 years with a frost, the median last spring frost at Harney Branch Exp STN falls on 20 June and the median first autumn frost on 22 August, which leaves a median of 61 days between them.

Fitted over all years, the growing season changes by +5.3 days per decade at this station.

Frost dates and growing season at Harney Branch Exp STN
Measure	Median, all years	Earliest period	Recent period (1923 to 1953)	Recent against earliest	Fitted trend
Last spring frost	20 June	n/a	20 June	n/a	+1.9 days per decade
First autumn frost	22 August	n/a	22 August	n/a	+7.2 days per decade
Growing days	61 days	n/a	61 days	n/a	+5.3 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

30 years, 1923 to 1953

A day with at least 17.8 mm (0.7 in) of rain is expected about once in 2 years. A day with at least 39.8 mm (1.6 in) of rain is expected about once in 100 years.

Rainfall return levels at Harney Branch Exp STN: the daily rain expected about once in a given number of years
Expected about once in	A day with at least	Note
2 years	17.8 mm (0.7 in)
5 years	23.9 mm (0.9 in)
10 years	27.8 mm (1.1 in)
25 years	32.7 mm (1.3 in)
50 years	36.3 mm (1.4 in)	Longer than the 30 years of record
100 years	39.8 mm (1.6 in)	Longer than the 30 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, 30 years of values from 1923 to 1953.

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: 40.1 mm (1.6 in) in 1927; 31.2 mm (1.2 in) in 1950; 26.7 mm (1.1 in) in 1937.

Download the Data

Data for Harney Branch Exp STN standing records by year: CSV or JSON. Field meanings are on the data page.
Data for Harney Branch Exp STN 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).