Whittier Threshold Days by Year (USC00509829)

14 fixed thresholds counted per year at Whittier (USC00509829): hot days, frost, tropical nights and heavy rain, with the most days in a year.

Key Facts for Whittier Thresholds

Whittier: days with 10 mm (0.39 in) or more of precipitation in 42 years, most in 1987 with 178.
Whittier: days with 25 mm (0.98 in) or more of precipitation in 42 years, most in 1987 with 108.
Whittier: days with 50 mm (1.97 in) or more of precipitation in 42 years, most in 1987 with 53.
Whittier: nights with a minimum temperature at or below 0 C (32 F) in 41 years, most in 1955 with 203.
14 fixed thresholds have at least one qualifying day at Whittier.

Nights at or below 0 C (32 F)

41 years with a qualifying day

Days per year at Whittier with nights with a minimum temperature at or below 0 C (32 F), with the decade average as a line. The most was 203 in 1955.

Nights at or below 0 C (32 F) per year at Whittier
Year	Days	Decade average
1943	165	168.5
1944	149	168.5
1945	183	168.5
1948	177	168.5
1951	168	178.3
1952	169	178.3
1955	203	178.3
1956	192	178.3
1957	166	178.3
1958	180	178.3
1959	170	178.3
1961	184	182
1962	175	182
1963	187	182
1965	182	182
1983	102	109
1984	111	109
1985	119	109
1986	102	109
1987	99	109
1988	121	109
1989	109	109
1990	141	118.9
1991	115	118.9
1992	138	118.9
1993	93	118.9
1994	133	118.9
1995	103	118.9
1996	149	118.9
1997	96	118.9
1998	102	118.9
2001	131	126.4
2002	123	126.4
2003	105	126.4
2004	129	126.4
2005	107	126.4
2006	139	126.4
2007	120	126.4
2008	154	126.4
2009	130	126.4
2010	131	131

For each year, a bar from the first to the last day at Whittier meeting 0 C (32 F).

First to last qualifying date each year at Whittier
Year	First date	Last date
1943	1943-01-01	1943-12-31
1944	1944-01-01	1944-12-31
1945	1945-01-01	1945-12-26
1948	1948-01-01	1948-12-31
1951	1951-01-01	1951-12-31
1952	1952-01-01	1952-12-31
1955	1955-01-01	1955-12-31
1956	1956-01-01	1956-12-31
1957	1957-01-01	1957-12-31
1958	1958-01-02	1958-12-31
1959	1959-01-01	1959-12-31
1961	1961-01-01	1961-12-31
1962	1962-01-02	1962-12-31
1963	1963-01-01	1963-12-31
1965	1965-01-01	1965-12-31
1983	1983-01-04	1983-12-31
1984	1984-01-04	1984-12-31
1985	1985-01-05	1985-12-31
1986	1986-01-01	1986-12-31
1987	1987-01-03	1987-12-31
1988	1988-01-01	1988-12-31
1989	1989-01-02	1989-12-31
1990	1990-01-01	1990-12-31
1991	1991-01-01	1991-12-30
1992	1992-01-02	1992-12-31
1993	1993-01-01	1993-12-31
1994	1994-01-01	1994-12-30
1995	1995-01-08	1995-12-16
1996	1996-01-02	1996-12-31
1997	1997-01-02	1997-12-31
1998	1998-01-01	1998-12-31
2001	2001-01-01	2001-12-29
2002	2002-01-02	2002-12-31
2003	2003-01-02	2003-12-31
2004	2004-01-01	2004-12-30
2005	2005-01-01	2005-12-27
2006	2006-01-01	2006-12-31
2007	2007-01-01	2007-12-30
2008	2008-01-01	2008-12-31
2009	2009-01-01	2009-12-31
2010	2010-01-01	2010-12-29

Every Fixed Threshold

Fixed thresholds at Whittier
Threshold	Years with a qualifying day	Most days in a year	Year	Latest year days
30 C (86 F): Days	1	1	1957	1
0 C (32 F): Ice days (max	28	120	1961	52
0 C (32 F): Frost days (min	41	203	1955	131
-10 C (14 F): Days with min	41	57	1956	5
-20 C (-4 F): Days with min	13	9	1943	4
20 C (68 F): Tropical nights (min	3	1	1955	1
10 mm (0.39 in): Days with 10 mm or more rain	42	178	1987	139
25 mm (0.98 in): Days with 25 mm or more rain	42	108	1987	72
50 mm (1.97 in): Days with 50 mm or more rain	42	53	1987	27
100 mm (3.94 in): Days with 100 mm or more rain	40	12	1985	2
200 mm (7.87 in): Days with 200 mm or more rain	2	1	1986	1
10 cm (3.9 in): Days with 10 cm or more snowfall	37	33	1955	26
25 cm (9.8 in): Days with 25 cm or more snowfall	36	12	1955	8
50 cm (19.7 in): Days with 50 cm or more snowfall	17	3	1955	1

Years with under 90 percent of days observed are left out of the most days column. Threshold history at this station starts in 1957.

Download the Data

Data for Whittier 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). Threshold counts are computed by this site.

Data as of 2025-12-31. Last revised 31 December 2025 (2025-12-31).

Whittier Threshold Days by Year (USC00509829)

Key Facts for Whittier Thresholds

Nights at or below 0 C (32 F)

Every Fixed Threshold

Download the Data

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