Hailey 3 NNW Weather Records (USC00103942)

Record envelope, standing records and threshold days for Hailey 3 NNW (USC00103942), Idaho, United States, with 96 years of record.

Key Facts for Hailey 3 NNW

Hailey 3 NNW (USC00103942) is a weather station in Idaho, United States at 43.57 latitude and -114.33 longitude, 1,653 m (5,424 ft) above sea level.
The station reports from 1893 to 1988, 96 years of record.
1,464 records set at Hailey 3 NNW still stand.
Records are tracked for tmax, tmin, prcp, snow, snwd: an element needs 30 years of data to be eligible.
Hailey 3 NNW set a daily record snowfall of 10.2 cm (4.0 in) on 6 May 1988.

About the Station

Location: Idaho, United States, 43.57 latitude, -114.33 longitude.
Elevation: 1,653 m (5,424 ft).
Period of record: 1893 to 1988, 96 years.
Eligible elements: tmax, tmin, prcp, snow, snwd.

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 Hailey 3 NNW. 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 Hailey 3 NNW, with 2026 drawn through them
Month	Highest record high	Lowest record low	2026 highest maximum	2026 lowest minimum
Jan	12.8 C (55.0 F)	-35.6 C (-32.1 F)	n/a	n/a
Feb	16.7 C (62.1 F)	-37.8 C (-36.0 F)	n/a	n/a
Mar	22.8 C (73.0 F)	-25.0 C (-13.0 F)	n/a	n/a
Apr	30.0 C (86.0 F)	-20.6 C (-5.1 F)	n/a	n/a
May	33.9 C (93.0 F)	-9.4 C (15.1 F)	n/a	n/a
Jun	42.8 C (109.0 F)	-5.6 C (21.9 F)	n/a	n/a
Jul	41.7 C (107.1 F)	-1.7 C (28.9 F)	n/a	n/a
Aug	40.0 C (104.0 F)	-2.2 C (28.0 F)	n/a	n/a
Sep	35.6 C (96.1 F)	-9.4 C (15.1 F)	n/a	n/a
Oct	29.4 C (84.9 F)	-16.1 C (3.0 F)	n/a	n/a
Nov	22.8 C (73.0 F)	-32.8 C (-27.0 F)	n/a	n/a
Dec	18.3 C (64.9 F)	-32.2 C (-26.0 F)	n/a	n/a

Which Years Hold Standing Records

1,464 standing records

1,464 records at Hailey 3 NNW still stand. 1895 holds the most, with 67.

Standing records at Hailey 3 NNW by the year they were set
Year set	Standing records
1894	37
1895	67
1900	42
1901	19
1902	28
1903	2
1904	12
1905	13
1906	25
1907	5
1909	18
1910	28
1911	8
1912	8
1913	25
1914	9
1915	16
1916	22
1917	32
1918	24
1919	28
1920	9
1921	12
1922	26
1923	5
1924	28
1925	9
1926	13
1927	16
1928	6
1929	23
1930	17
1931	22
1932	20
1933	26
1934	45
1935	20
1936	25
1937	18
1938	7
1939	22
1940	12
1941	19
1942	20
1943	12
1944	9
1945	14
1946	7
1947	10
1948	15
1949	13
1950	22
1951	13
1952	14
1953	6
1954	22
1955	29
1956	18
1957	3
1958	15
1959	12
1960	24
1961	7
1962	12
1963	19
1964	17
1965	15
1966	17
1967	14
1968	21
1969	19
1970	16
1971	13
1972	21
1973	2
1974	12
1975	15
1976	9
1977	10
1978	17
1979	9
1980	15
1981	14
1984	3
1986	2
1987	14
1988	5

All-Time Record Progression

5 new records

5 all-time records were set at Hailey 3 NNW between 9 February 1933 and 12 January 1963. Each dot is a new record.

When Hailey 3 NNW set new all-time records
Date	Kind	Detail
1933-02-09	Record low minimum temperature	Record low minimum temperature -37.8 C (-36.0 F)
1937-12-11	Record daily precipitation	Record daily precipitation 65.0 mm (2.6 in)
1943-01-21	Record daily precipitation	Record daily precipitation 70.6 mm (2.8 in)
1956-02-20	Record daily snowfall	Record daily snowfall 53.3 cm (21.0 in)
1963-01-12	Record low maximum temperature	Record low maximum temperature -21.1 C (-6.0 F)

Wettest Day of Each Month

Jan: 70.6 mm (2.8 in)

The wettest day on record for each calendar month at Hailey 3 NNW. The most was 70.6 mm (2.8 in) on 21 January 1943.

Record daily precipitation for each month at Hailey 3 NNW
Month	Record daily precipitation (mm)	Date
Jan	70.6 mm (2.8 in)	21 January 1943
Feb	62.2 mm (2.4 in)	1 February 1963
Mar	41.9 mm (1.6 in)	10 March 1903
Apr	38.1 mm (1.5 in)	20 April 1981
May	40.6 mm (1.6 in)	12 May 1958
Jun	40.4 mm (1.6 in)	6 June 1968
Jul	32.0 mm (1.3 in)	2 July 1938
Aug	38.1 mm (1.5 in)	18 August 1912
Sep	38.1 mm (1.5 in)	13 September 1959
Oct	35.8 mm (1.4 in)	19 October 1979
Nov	42.4 mm (1.7 in)	9 November 1927
Dec	68.1 mm (2.7 in)	22 December 1964

Period of Record Coverage

1894 to 1988

89 years of record at Hailey 3 NNW, 1894 to 1988. 24 years have data for under 90 percent of days and are left out of rankings: 1894, 1895, 1900, 1902, 1903, 1904, 1905, 1906 and others.

Days with data per year at Hailey 3 NNW
Year	Days with data	Share of year	Complete
1894	275	75%	No
1895	304	83%	No
1900	223	61%	No
1901	352	96%	Yes
1902	303	83%	No
1903	31	8%	No
1904	122	33%	No
1905	183	50%	No
1906	78	21%	No
1907	60	16%	No
1908	8	2%	No
1909	360	99%	Yes
1910	363	99%	Yes
1911	365	100%	Yes
1912	356	97%	Yes
1913	362	99%	Yes
1914	365	100%	Yes
1915	364	100%	Yes
1916	364	99%	Yes
1917	362	99%	Yes
1918	363	99%	Yes
1919	361	99%	Yes
1920	364	99%	Yes
1921	364	100%	Yes
1922	364	100%	Yes
1923	363	99%	Yes
1924	366	100%	Yes
1925	365	100%	Yes
1926	365	100%	Yes
1927	365	100%	Yes
1928	366	100%	Yes
1929	365	100%	Yes
1930	364	100%	Yes
1931	365	100%	Yes
1932	365	100%	Yes
1933	363	99%	Yes
1934	364	100%	Yes
1935	365	100%	Yes
1936	366	100%	Yes
1937	365	100%	Yes
1938	363	99%	Yes
1939	364	100%	Yes
1940	366	100%	Yes
1941	364	100%	Yes
1942	356	98%	Yes
1943	341	93%	Yes
1944	364	99%	Yes
1945	362	99%	Yes
1946	361	99%	Yes
1947	362	99%	Yes
1948	366	100%	Yes
1949	364	100%	Yes
1950	365	100%	Yes
1951	364	100%	Yes
1952	366	100%	Yes
1953	332	91%	Yes
1954	364	100%	Yes
1955	336	92%	Yes
1956	333	91%	Yes
1957	360	99%	Yes
1958	364	100%	Yes
1959	364	100%	Yes
1960	355	97%	Yes
1961	355	97%	Yes
1962	355	97%	Yes
1963	357	98%	Yes
1964	365	100%	Yes
1965	356	98%	Yes
1966	361	99%	Yes
1967	351	96%	Yes
1968	304	83%	No
1969	347	95%	Yes
1970	354	97%	Yes
1971	364	100%	Yes
1972	295	81%	No
1973	243	67%	No
1974	324	89%	No
1975	313	86%	No
1976	266	73%	No
1977	247	68%	No
1978	291	80%	No
1979	364	100%	Yes
1980	274	75%	No
1981	364	100%	Yes
1982	29	8%	No
1984	51	14%	No
1986	122	33%	No
1987	271	74%	No
1988	253	69%	No

Latest Records

Latest records at Hailey 3 NNW
Date	Station	Record	Value	Beat old record by	Old record stood	Significance
6 May 1988	Hailey 3 NNW, US	daily snowfall	10.2 cm (4.0 in)	10.2 cm (4.0 in)	88 years	55 of 100 (Notable)
3 May 1988	Hailey 3 NNW, US	daily low min	-7.8 C (18.0 F)	1.7 C (3.1 F)	86 years	38 of 100 (Notable)
2 May 1988	Hailey 3 NNW, US	daily low min	-7.2 C (19.0 F)	0.5 C (0.9 F)	40 years	22 of 100 (Routine)
26 April 1988	Hailey 3 NNW, US	daily low min	-6.7 C (19.9 F)	1.1 C (2.0 F)	67 years	31 of 100 (Routine)
15 April 1988	Hailey 3 NNW, US	monthly high min (Tie)	8.9 C (48.0 F)	tie	20 years	6 of 100 (Routine)
3 April 1988	Hailey 3 NNW, US	daily high min	2.8 C (37.0 F)	1.7 C (3.1 F)	73 years	34 of 100 (Routine)
26 March 1988	Hailey 3 NNW, US	daily high max (Tie)	16.7 C (62.1 F)	tie	92 years	9 of 100 (Routine)
11 January 1988	Hailey 3 NNW, US	daily rain (Tie)	15.2 mm (0.6 in)	tie	52 years	6 of 100 (Routine)
6 November 1987	Hailey 3 NNW, US	daily high min	3.9 C (39.0 F)	1.1 C (2.0 F)	17 years	16 of 100 (Routine)
1 November 1987	Hailey 3 NNW, US	monthly high min (Tie)	6.1 C (43.0 F)	tie	45 years	8 of 100 (Routine)
23 July 1987	Hailey 3 NNW, US	daily low max	23.3 C (73.9 F)	0.6 C (1.1 F)	16 years	15 of 100 (Routine)
22 July 1987	Hailey 3 NNW, US	daily rain	19.1 mm (0.8 in)	9.2 mm (0.36 in)	8 years	20 of 100 (Routine)
22 July 1987	Hailey 3 NNW, US	daily low max	18.9 C (66.0 F)	1.7 C (3.1 F)	14 years	17 of 100 (Routine)
21 July 1987	Hailey 3 NNW, US	daily low min	1.7 C (35.1 F)	1.6 C (2.9 F)	14 years	17 of 100 (Routine)
20 July 1987	Hailey 3 NNW, US	daily low min	2.2 C (36.0 F)	1.7 C (3.1 F)	91 years	41 of 100 (Notable)
20 July 1987	Hailey 3 NNW, US	daily low max	21.7 C (71.1 F)	1.1 C (2.0 F)	14 years	16 of 100 (Routine)
17 July 1987	Hailey 3 NNW, US	daily low max (Tie)	25.0 C (77.0 F)	tie	72 years	7 of 100 (Routine)
2 June 1987	Hailey 3 NNW, US	daily low min (Tie)	-2.2 C (28.0 F)	tie	32 years	4 of 100 (Routine)
28 May 1987	Hailey 3 NNW, US	daily rain	25.4 mm (1.0 in)	12.7 mm (0.5 in)	65 years	52 of 100 (Notable)
25 May 1987	Hailey 3 NNW, US	daily rain	38.1 mm (1.5 in)	15.2 mm (0.6 in)	91 years	64 of 100 (Major)

Climate Trend

58 complete years, 1909 to 1981

One stripe for each of 58 complete years at Hailey 3 NNW, 1909 to 1981. Blue stripes are years cooler than the station's own mean of 6.3 C (43.3 F); red stripes are warmer. The coolest year was 1932, at 5.2 C (41.4 F), and the warmest was 1934, at 9.0 C (48.1 F). The strongest colour marks a difference of 2.7 C (4.9 F).

Annual mean temperature at Hailey 3 NNW as warming stripes, 1909 to 1981
Year	Annual mean temperature	Difference from the station mean
1909	6.0 C	-0.31 C
1910	7.3 C	+0.96 C
1911	5.3 C	-1.04 C
1912	5.6 C	-0.66 C
1913	5.6 C	-0.69 C
1914	6.4 C	+0.08 C
1915	6.8 C	+0.50 C
1916	5.4 C	-0.86 C
1917	5.9 C	-0.42 C
1918	6.8 C	+0.54 C
1919	6.6 C	+0.27 C
1920	5.8 C	-0.50 C
1921	6.2 C	-0.14 C
1922	5.4 C	-0.90 C
1923	5.7 C	-0.59 C
1924	6.5 C	+0.19 C
1925	6.8 C	+0.48 C
1926	6.9 C	+0.63 C
1927	5.4 C	-0.87 C
1928	5.8 C	-0.46 C
1929	5.6 C	-0.74 C
1930	6.2 C	-0.13 C
1931	6.6 C	+0.29 C
1932	5.2 C	-1.10 C
1933	6.2 C	-0.10 C
1934	9.0 C	+2.66 C
1935	5.8 C	-0.46 C
1936	6.7 C	+0.36 C
1937	6.3 C	+0.01 C
1938	6.4 C	+0.05 C
1939	7.5 C	+1.18 C
1940	7.7 C	+1.35 C
1941	7.2 C	+0.87 C
1942	6.2 C	-0.15 C
1943	7.0 C	+0.71 C
1944	6.1 C	-0.19 C
1945	6.2 C	-0.13 C
1946	6.4 C	+0.13 C
1947	7.0 C	+0.67 C
1948	5.9 C	-0.38 C
1949	6.5 C	+0.21 C
1950	6.4 C	+0.10 C
1951	5.5 C	-0.80 C
1952	6.1 C	-0.23 C
1954	6.2 C	-0.12 C
1957	5.9 C	-0.45 C
1958	6.9 C	+0.55 C
1959	6.0 C	-0.32 C
1960	5.8 C	-0.49 C
1961	6.4 C	+0.10 C
1962	6.0 C	-0.33 C
1965	5.9 C	-0.38 C
1966	6.7 C	+0.44 C
1967	6.5 C	+0.15 C
1970	6.2 C	-0.07 C
1971	5.6 C	-0.74 C
1979	6.5 C	+0.24 C
1981	7.3 C	+1.02 C

The fitted trend in annual mean temperature here over 1909 to 1981 is 0.04 C (-0.05 to 0.14) per decade. The interval includes zero, so the trend is not clearly different from zero. In Fahrenheit: 0.1 F (-0.1 to 0.2) per decade. The slope is a straight line fitted to 58 complete years; the brackets give its 95 percent interval.

Fitted temperature trends per decade at Hailey 3 NNW
Measure	Per decade (C)	Per decade (F)	Period	Complete years	Reading
Annual mean temperature	0.04 C (-0.05 to 0.14) per decade	0.1 F (-0.1 to 0.2) per decade	1909 to 1981	58	Not clearly different from zero
Mean daily maximum	0.00 C (-0.12 to 0.12) per decade	0.00 F (-0.21 to 0.21) per decade	1909 to 1981	58	Not clearly different from zero
Mean daily minimum	0.09 C (-0.01 to 0.19) per decade	0.16 F (-0.03 to 0.34) per decade	1909 to 1981	58	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

1893 to 1988

Yearly extremes at Hailey 3 NNW: the record and the median year
Measure	Record	Year of the record	Median year	Years with a value
Hottest day (TXx)	42.8 C (109.0 F)	1900	35.0 C (95.0 F)	89
Coldest night (TNn)	-37.8 C (-36.0 F)	1933	-26.1 C (-15.0 F)	89
Wettest day (Rx1day)	70.6 mm (2.8 in)	1943	31.0 mm (1.2 in)	89
Wettest five days (Rx5day)	196.9 mm (7.8 in)	1964	52.9 mm (2.1 in)	89
Longest dry spell (CDD)	116 days	1942	42 days	89

Hottest day (TXx)

The hottest day of the year at Hailey 3 NNW, 1893 to 1988. The record is 42.8 C (109.0 F) in 1900, marked on the chart; the median year is 35.0 C (95.0 F).

Hottest day (TXx) at Hailey 3 NNW by year
Year	Hottest day (TXx)
1893	n/a
1894	40.0 C (104.0 F)
1895	37.8 C (100.0 F)
1900	42.8 C (109.0 F)
1901	37.8 C (100.0 F)
1902	37.2 C (99.0 F)
1903	9.4 C (48.9 F)
1904	37.2 C (99.0 F)
1905	35.0 C (95.0 F)
1906	21.1 C (70.0 F)
1907	28.3 C (82.9 F)
1908	6.7 C (44.1 F)
1909	36.1 C (97.0 F)
1910	36.7 C (98.1 F)
1911	35.6 C (96.1 F)
1912	35.0 C (95.0 F)
1913	34.4 C (93.9 F)
1914	33.9 C (93.0 F)
1915	35.6 C (96.1 F)
1916	33.9 C (93.0 F)
1917	35.6 C (96.1 F)
1918	35.0 C (95.0 F)
1919	37.8 C (100.0 F)
1920	35.0 C (95.0 F)
1921	35.6 C (96.1 F)
1922	35.0 C (95.0 F)
1923	35.6 C (96.1 F)
1924	36.1 C (97.0 F)
1925	36.7 C (98.1 F)
1926	35.6 C (96.1 F)
1927	34.4 C (93.9 F)
1928	36.7 C (98.1 F)
1929	36.1 C (97.0 F)
1930	35.6 C (96.1 F)
1931	37.8 C (100.0 F)
1932	33.9 C (93.0 F)
1933	37.2 C (99.0 F)
1934	39.4 C (102.9 F)
1935	36.7 C (98.1 F)
1936	38.3 C (100.9 F)
1937	35.6 C (96.1 F)
1938	33.3 C (91.9 F)
1939	38.9 C (102.0 F)
1940	37.8 C (100.0 F)
1941	35.0 C (95.0 F)
1942	35.0 C (95.0 F)
1943	36.1 C (97.0 F)
1944	32.8 C (91.0 F)
1945	35.0 C (95.0 F)
1946	35.6 C (96.1 F)
1947	35.6 C (96.1 F)
1948	35.0 C (95.0 F)
1949	36.7 C (98.1 F)
1950	35.6 C (96.1 F)
1951	35.6 C (96.1 F)
1952	33.3 C (91.9 F)
1953	37.8 C (100.0 F)
1954	35.0 C (95.0 F)
1955	35.0 C (95.0 F)
1956	34.4 C (93.9 F)
1957	32.2 C (90.0 F)
1958	34.4 C (93.9 F)
1959	36.1 C (97.0 F)
1960	36.7 C (98.1 F)
1961	36.7 C (98.1 F)
1962	34.4 C (93.9 F)
1963	33.3 C (91.9 F)
1964	34.4 C (93.9 F)
1965	32.8 C (91.0 F)
1966	34.4 C (93.9 F)
1967	34.4 C (93.9 F)
1968	34.4 C (93.9 F)
1969	35.0 C (95.0 F)
1970	33.3 C (91.9 F)
1971	36.1 C (97.0 F)
1972	35.0 C (95.0 F)
1973	35.6 C (96.1 F)
1974	36.7 C (98.1 F)
1975	35.6 C (96.1 F)
1976	35.0 C (95.0 F)
1977	35.0 C (95.0 F)
1978	33.9 C (93.0 F)
1979	34.4 C (93.9 F)
1980	31.7 C (89.1 F)
1981	34.4 C (93.9 F)
1982	5.6 C (42.1 F)
1984	30.0 C (86.0 F)
1986	28.9 C (84.0 F)
1987	32.2 C (90.0 F)
1988	35.0 C (95.0 F)

Coldest night (TNn)

The coldest night of the year at Hailey 3 NNW, 1893 to 1988. The record is -37.8 C (-36.0 F) in 1933, marked on the chart; the median year is -26.1 C (-15.0 F).

Coldest night (TNn) at Hailey 3 NNW by year
Year	Coldest night (TNn)
1893	n/a
1894	-22.2 C (-8.0 F)
1895	-30.0 C (-22.0 F)
1900	-11.1 C (12.0 F)
1901	-22.2 C (-8.0 F)
1902	-31.7 C (-25.1 F)
1903	-19.4 C (-2.9 F)
1904	-10.6 C (12.9 F)
1905	-24.4 C (-11.9 F)
1906	-25.0 C (-13.0 F)
1907	-1.7 C (28.9 F)
1908	-15.6 C (3.9 F)
1909	-21.7 C (-7.1 F)
1910	-27.2 C (-17.0 F)
1911	-23.9 C (-11.0 F)
1912	-27.8 C (-18.0 F)
1913	-29.4 C (-20.9 F)
1914	-26.1 C (-15.0 F)
1915	-26.7 C (-16.1 F)
1916	-26.7 C (-16.1 F)
1917	-27.2 C (-17.0 F)
1918	-25.0 C (-13.0 F)
1919	-32.2 C (-26.0 F)
1920	-22.8 C (-9.0 F)
1921	-23.9 C (-11.0 F)
1922	-32.8 C (-27.0 F)
1923	-26.7 C (-16.1 F)
1924	-30.0 C (-22.0 F)
1925	-23.9 C (-11.0 F)
1926	-24.4 C (-11.9 F)
1927	-27.8 C (-18.0 F)
1928	-26.7 C (-16.1 F)
1929	-30.0 C (-22.0 F)
1930	-30.0 C (-22.0 F)
1931	-25.6 C (-14.1 F)
1932	-30.0 C (-22.0 F)
1933	-37.8 C (-36.0 F)
1934	-21.1 C (-6.0 F)
1935	-33.9 C (-29.0 F)
1936	-30.0 C (-22.0 F)
1937	-35.6 C (-32.1 F)
1938	-21.7 C (-7.1 F)
1939	-23.3 C (-9.9 F)
1940	-23.3 C (-9.9 F)
1941	-26.1 C (-15.0 F)
1942	-31.7 C (-25.1 F)
1943	-28.9 C (-20.0 F)
1944	-21.7 C (-7.1 F)
1945	-26.1 C (-15.0 F)
1946	-23.9 C (-11.0 F)
1947	-25.0 C (-13.0 F)
1948	-25.6 C (-14.1 F)
1949	-32.8 C (-27.0 F)
1950	-30.0 C (-22.0 F)
1951	-31.7 C (-25.1 F)
1952	-27.2 C (-17.0 F)
1953	-21.1 C (-6.0 F)
1954	-22.8 C (-9.0 F)
1955	-32.8 C (-27.0 F)
1956	-30.6 C (-23.1 F)
1957	-27.8 C (-18.0 F)
1958	-23.3 C (-9.9 F)
1959	-30.0 C (-22.0 F)
1960	-26.7 C (-16.1 F)
1961	-25.6 C (-14.1 F)
1962	-32.8 C (-27.0 F)
1963	-33.3 C (-27.9 F)
1964	-31.7 C (-25.1 F)
1965	-22.2 C (-8.0 F)
1966	-23.3 C (-9.9 F)
1967	-28.9 C (-20.0 F)
1968	-26.1 C (-15.0 F)
1969	-24.4 C (-11.9 F)
1970	-25.0 C (-13.0 F)
1971	-32.2 C (-26.0 F)
1972	-31.7 C (-25.1 F)
1973	-23.3 C (-9.9 F)
1974	-28.3 C (-18.9 F)
1975	-29.4 C (-20.9 F)
1976	-22.2 C (-8.0 F)
1977	-27.8 C (-18.0 F)
1978	-28.3 C (-18.9 F)
1979	-28.9 C (-20.0 F)
1980	-26.1 C (-15.0 F)
1981	-23.9 C (-11.0 F)
1982	-26.1 C (-15.0 F)
1984	-8.9 C (16.0 F)
1986	-17.2 C (1.0 F)
1987	-26.7 C (-16.1 F)
1988	-22.2 C (-8.0 F)

Wettest day (Rx1day)

The wettest day of the year at Hailey 3 NNW, 1893 to 1988. The record is 70.6 mm (2.8 in) in 1943, marked on the chart; the median year is 31.0 mm (1.2 in).

Wettest day (Rx1day) at Hailey 3 NNW by year
Year	Wettest day (Rx1day)
1893	n/a
1894	18.8 mm (0.7 in)
1895	36.1 mm (1.4 in)
1900	33.3 mm (1.3 in)
1901	29.2 mm (1.1 in)
1902	29.0 mm (1.1 in)
1903	41.9 mm (1.6 in)
1904	18.5 mm (0.7 in)
1905	15.7 mm (0.6 in)
1906	33.0 mm (1.3 in)
1907	15.2 mm (0.6 in)
1908	50.8 mm (2.0 in)
1909	24.1 mm (0.9 in)
1910	16.0 mm (0.6 in)
1911	36.1 mm (1.4 in)
1912	38.1 mm (1.5 in)
1913	30.5 mm (1.2 in)
1914	34.3 mm (1.4 in)
1915	32.8 mm (1.3 in)
1916	25.9 mm (1.0 in)
1917	46.2 mm (1.8 in)
1918	22.9 mm (0.9 in)
1919	30.5 mm (1.2 in)
1920	30.5 mm (1.2 in)
1921	35.6 mm (1.4 in)
1922	37.6 mm (1.5 in)
1923	22.4 mm (0.9 in)
1924	26.7 mm (1.1 in)
1925	31.0 mm (1.2 in)
1926	25.4 mm (1.0 in)
1927	42.4 mm (1.7 in)
1928	23.4 mm (0.9 in)
1929	52.6 mm (2.1 in)
1930	19.3 mm (0.8 in)
1931	43.2 mm (1.7 in)
1932	21.8 mm (0.9 in)
1933	23.1 mm (0.9 in)
1934	19.6 mm (0.8 in)
1935	31.8 mm (1.3 in)
1936	28.4 mm (1.1 in)
1937	65.0 mm (2.6 in)
1938	32.0 mm (1.3 in)
1939	20.3 mm (0.8 in)
1940	33.3 mm (1.3 in)
1941	35.6 mm (1.4 in)
1942	25.7 mm (1.0 in)
1943	70.6 mm (2.8 in)
1944	29.2 mm (1.1 in)
1945	46.7 mm (1.8 in)
1946	38.1 mm (1.5 in)
1947	21.6 mm (0.9 in)
1948	22.1 mm (0.9 in)
1949	30.7 mm (1.2 in)
1950	27.2 mm (1.1 in)
1951	31.2 mm (1.2 in)
1952	48.8 mm (1.9 in)
1953	14.0 mm (0.6 in)
1954	29.0 mm (1.1 in)
1955	60.7 mm (2.4 in)
1956	31.0 mm (1.2 in)
1957	25.1 mm (1.0 in)
1958	40.6 mm (1.6 in)
1959	38.1 mm (1.5 in)
1960	47.0 mm (1.9 in)
1961	26.9 mm (1.1 in)
1962	38.6 mm (1.5 in)
1963	62.2 mm (2.4 in)
1964	68.1 mm (2.7 in)
1965	30.5 mm (1.2 in)
1966	45.5 mm (1.8 in)
1967	41.9 mm (1.6 in)
1968	40.4 mm (1.6 in)
1969	44.5 mm (1.8 in)
1970	46.7 mm (1.8 in)
1971	28.7 mm (1.1 in)
1972	15.7 mm (0.6 in)
1973	30.0 mm (1.2 in)
1974	15.2 mm (0.6 in)
1975	31.8 mm (1.3 in)
1976	37.8 mm (1.5 in)
1977	35.8 mm (1.4 in)
1978	26.9 mm (1.1 in)
1979	35.8 mm (1.4 in)
1980	14.7 mm (0.6 in)
1981	38.1 mm (1.5 in)
1982	27.9 mm (1.1 in)
1984	10.2 mm (0.4 in)
1986	9.7 mm (0.38 in)
1987	38.1 mm (1.5 in)
1988	25.1 mm (1.0 in)

Wettest five days (Rx5day)

The wettest five days of the year at Hailey 3 NNW, 1893 to 1988. The record is 196.9 mm (7.8 in) in 1964, marked on the chart; the median year is 52.9 mm (2.1 in).

Wettest five days (Rx5day) at Hailey 3 NNW by year
Year	Wettest five days (Rx5day)
1893	n/a
1894	39.9 mm (1.6 in)
1895	53.9 mm (2.1 in)
1900	34.3 mm (1.4 in)
1901	85.6 mm (3.4 in)
1902	55.4 mm (2.2 in)
1903	63.3 mm (2.5 in)
1904	31.6 mm (1.2 in)
1905	28.4 mm (1.1 in)
1906	80.6 mm (3.2 in)
1907	15.2 mm (0.6 in)
1908	0.0 mm (0.00 in)
1909	54.2 mm (2.1 in)
1910	40.4 mm (1.6 in)
1911	62.5 mm (2.5 in)
1912	39.4 mm (1.6 in)
1913	43.9 mm (1.7 in)
1914	58.7 mm (2.3 in)
1915	45.3 mm (1.8 in)
1916	53.3 mm (2.1 in)
1917	95.8 mm (3.8 in)
1918	41.6 mm (1.6 in)
1919	60.8 mm (2.4 in)
1920	50.6 mm (2.0 in)
1921	65.0 mm (2.6 in)
1922	49.6 mm (2.0 in)
1923	42.5 mm (1.7 in)
1924	39.4 mm (1.6 in)
1925	74.9 mm (2.9 in)
1926	60.8 mm (2.4 in)
1927	69.5 mm (2.7 in)
1928	30.7 mm (1.2 in)
1929	113.6 mm (4.5 in)
1930	36.3 mm (1.4 in)
1931	106.3 mm (4.2 in)
1932	52.9 mm (2.1 in)
1933	58.4 mm (2.3 in)
1934	30.8 mm (1.2 in)
1935	50.4 mm (2.0 in)
1936	50.8 mm (2.0 in)
1937	99.3 mm (3.9 in)
1938	69.9 mm (2.8 in)
1939	27.4 mm (1.1 in)
1940	60.1 mm (2.4 in)
1941	73.2 mm (2.9 in)
1942	60.0 mm (2.4 in)
1943	147.2 mm (5.8 in)
1944	50.6 mm (2.0 in)
1945	74.6 mm (2.9 in)
1946	74.1 mm (2.9 in)
1947	21.9 mm (0.9 in)
1948	48.0 mm (1.9 in)
1949	60.4 mm (2.4 in)
1950	54.3 mm (2.1 in)
1951	59.4 mm (2.3 in)
1952	67.4 mm (2.7 in)
1953	40.9 mm (1.6 in)
1954	47.3 mm (1.9 in)
1955	150.5 mm (5.9 in)
1956	34.8 mm (1.4 in)
1957	49.8 mm (2.0 in)
1958	43.9 mm (1.7 in)
1959	52.2 mm (2.1 in)
1960	49.5 mm (1.9 in)
1961	43.1 mm (1.7 in)
1962	90.6 mm (3.6 in)
1963	100.1 mm (3.9 in)
1964	196.9 mm (7.8 in)
1965	60.2 mm (2.4 in)
1966	95.5 mm (3.8 in)
1967	92.0 mm (3.6 in)
1968	60.7 mm (2.4 in)
1969	115.3 mm (4.5 in)
1970	79.6 mm (3.1 in)
1971	38.9 mm (1.5 in)
1972	36.4 mm (1.4 in)
1973	59.0 mm (2.3 in)
1974	40.7 mm (1.6 in)
1975	66.6 mm (2.6 in)
1976	43.1 mm (1.7 in)
1977	35.1 mm (1.4 in)
1978	64.2 mm (2.5 in)
1979	46.7 mm (1.8 in)
1980	19.1 mm (0.8 in)
1981	38.1 mm (1.5 in)
1982	27.9 mm (1.1 in)
1984	10.2 mm (0.4 in)
1986	22.4 mm (0.9 in)
1987	71.6 mm (2.8 in)
1988	28.9 mm (1.1 in)

Longest dry spell (CDD)

The longest dry spell of the year at Hailey 3 NNW, 1893 to 1988. The record is 116 days in 1942, marked on the chart; the median year is 42 days.

Longest dry spell (CDD) at Hailey 3 NNW by year
Year	Longest dry spell (CDD)
1893	n/a
1894	35 days
1895	42 days
1900	39 days
1901	55 days
1902	80 days
1903	3 days
1904	28 days
1905	32 days
1906	9 days
1907	15 days
1908	22 days
1909	31 days
1910	54 days
1911	92 days
1912	29 days
1913	46 days
1914	41 days
1915	49 days
1916	43 days
1917	66 days
1918	23 days
1919	60 days
1920	32 days
1921	36 days
1922	49 days
1923	31 days
1924	78 days
1925	20 days
1926	30 days
1927	26 days
1928	38 days
1929	46 days
1930	25 days
1931	32 days
1932	35 days
1933	30 days
1934	42 days
1935	79 days
1936	68 days
1937	57 days
1938	28 days
1939	51 days
1940	76 days
1941	30 days
1942	116 days
1943	93 days
1944	28 days
1945	48 days
1946	35 days
1947	69 days
1948	66 days
1949	64 days
1950	46 days
1951	37 days
1952	71 days
1953	101 days
1954	51 days
1955	56 days
1956	40 days
1957	73 days
1958	40 days
1959	42 days
1960	85 days
1961	54 days
1962	29 days
1963	41 days
1964	37 days
1965	59 days
1966	42 days
1967	44 days
1968	35 days
1969	65 days
1970	30 days
1971	28 days
1972	26 days
1973	31 days
1974	60 days
1975	43 days
1976	31 days
1977	48 days
1978	52 days
1979	58 days
1980	27 days
1981	45 days
1982	14 days
1984	14 days
1986	29 days
1987	43 days
1988	64 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

58 years with a frost

Across 58 years with a frost, the median last spring frost at Hailey 3 NNW falls on 11 June and the median first autumn frost on 9 September, which leaves a median of 90 days between them.

Fitted over all years, the growing season changes by +1.1 days per decade at this station.

Frost dates and growing season at Hailey 3 NNW
Measure	Median, all years	Earliest period	Recent period (1937 to 1981)	Recent against earliest	Fitted trend
Last spring frost	11 June	n/a	15 June	n/a	+0.7 days per decade
First autumn frost	9 September	n/a	9 September	n/a	+1.8 days per decade
Growing days	90 days	n/a	94 days	n/a	+1.1 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

64 years, 1901 to 1979

A day with at least 32.3 mm (1.3 in) of rain is expected about once in 2 years. A day with at least 77.3 mm (3.0 in) of rain is expected about once in 100 years.

Rainfall return levels at Hailey 3 NNW: the daily rain expected about once in a given number of years
Expected about once in	A day with at least	Note
2 years	32.3 mm (1.3 in)
5 years	43.1 mm (1.7 in)
10 years	50.8 mm (2.0 in)
25 years	61.0 mm (2.4 in)
50 years	69.0 mm (2.7 in)
100 years	77.3 mm (3.0 in)	Longer than the 64 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, 64 years of values from 1901 to 1979.

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: 70.6 mm (2.8 in) in 1943; 68.1 mm (2.7 in) in 1964; 65.0 mm (2.6 in) in 1937.

Station Changes

1 suspected

One change was suspected in the annual mean temperature of Hailey 3 NNW, at 1954. Each is measured against neighbouring stations.

Relative to 5 neighbouring stations, the station's annual mean temperature from 1954 ran 0.3 C (0.6 F) lower than in the years before (possible change).

Suspected changes in the annual mean temperature at Hailey 3 NNW, against neighbouring stations
Year	Shift (C)	Shift (F)	Strength	Neighbours
1954	-0.3	-0.6	possible	5

Possible change at the station (a move, a new instrument or a new site); the record is kept as measured. A "likely" change has a larger test statistic than a "possible" one. Neither says why the station differs from its neighbours. How changes are found, and the largest ones.

Download the Data

Data for Hailey 3 NNW standing records by year: CSV or JSON. Field meanings are on the data page.
Data for Hailey 3 NNW 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 2026-10-17 (17 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).