Mission Threshold Days by Year (USC00395620)

19 fixed thresholds counted per year at Mission (USC00395620): hot days, frost, tropical nights and heavy rain, with the most days in a year.

Key Facts for Mission Thresholds

Mission: days with 10 mm (0.39 in) or more of precipitation in 45 years, most in 1998 with 26.
Mission: days with 25 mm (0.98 in) or more of precipitation in 45 years, most in 1999 with 8.
Mission: nights with a minimum temperature at or below 0 C (32 F) in 44 years, most in 1970 with 186.
Mission: nights with a minimum temperature at or below -10 C (14 F) in 44 years, most in 1975 with 86.
19 fixed thresholds have at least one qualifying day at Mission.

Days at or above 30 C (86 F)

43 years with a qualifying day

Days per year at Mission with a maximum temperature at or above 30 C (86 F), with the decade average as a line. The most was 73 in 1970.

Days at or above 30 C (86 F) per year at Mission
Year	Days	Decade average
1967	42	46
1968	44	46
1969	52	46
1970	73	62.1
1971	62	62.1
1972	48	62.1
1973	62	62.1
1974	65	62.1
1975	63	62.1
1976	73	62.1
1979	51	62.1
1980	69	51.9
1981	46	51.9
1982	45	51.9
1983	60	51.9
1984	37	51.9
1985	51	51.9
1986	34	51.9
1987	54	51.9
1988	67	51.9
1989	56	51.9
1990	54	42.3
1991	51	42.3
1992	24	42.3
1993	21	42.3
1994	39	42.3
1995	53	42.3
1996	47	42.3
1997	46	42.3
1998	45	42.3
1999	43	42.3
2000	58	53.8
2001	55	53.8
2002	65	53.8
2003	61	53.8
2004	40	53.8
2005	60	53.8
2006	58	53.8
2007	65	53.8
2008	41	53.8
2009	35	53.8
2010	57	58.5
2011	60	58.5

For each year, a bar from the first to the last day at Mission meeting 30 C (86 F).

First to last qualifying date each year at Mission
Year	First date	Last date
1967	1967-05-23	1967-10-04
1968	1968-06-03	1968-10-31
1969	1969-05-15	1969-09-29
1970	1970-05-08	1970-10-06
1971	1971-04-16	1971-09-14
1972	1972-05-17	1972-09-20
1973	1973-05-21	1973-10-08
1974	1974-05-20	1974-10-11
1975	1975-04-27	1975-10-09
1976	1976-05-12	1976-10-01
1979	1979-05-17	1979-10-01
1980	1980-04-21	1980-10-10
1981	1981-05-03	1981-09-29
1982	1982-05-04	1982-09-11
1983	1983-05-27	1983-10-01
1984	1984-06-01	1984-09-20
1985	1985-04-16	1985-09-19
1986	1986-05-05	1986-09-10
1987	1987-04-18	1987-09-27
1988	1988-05-18	1988-09-18
1989	1989-04-22	1989-10-01
1990	1990-04-23	1990-10-06
1991	1991-04-07	1991-10-17
1992	1992-05-01	1992-10-22
1993	1993-06-22	1993-10-07
1994	1994-05-17	1994-09-15
1995	1995-06-07	1995-10-13
1996	1996-04-11	1996-09-10
1997	1997-05-18	1997-10-03
1998	1998-05-18	1998-09-19
1999	1999-06-05	1999-09-25
2000	2000-05-05	2000-09-19
2001	2001-04-29	2001-09-11
2002	2002-05-30	2002-09-18
2003	2003-04-14	2003-10-20
2004	2004-05-06	2004-09-21
2005	2005-05-21	2005-10-03
2006	2006-05-19	2006-10-08
2007	2007-05-13	2007-10-04
2008	2008-06-25	2008-09-26
2009	2009-04-24	2009-09-09
2010	2010-05-23	2010-10-16
2011	2011-05-09	2011-10-05

Every Fixed Threshold

Fixed thresholds at Mission
Threshold	Years with a qualifying day	Most days in a year	Year	Latest year days
30 C (86 F): Days	43	73	1970	60
35 C (95 F): Days	43	32	1970	12
40 C (104 F): Days	18	4	1974	1
90 F (32.2 C): Days	43	59	1970	29
100 F (37.8 C): Days	36	13	2002	2
110 F (43.3 C): Days	1	2	2006	2
0 C (32 F): Ice days (max	43	73	1969	53
0 C (32 F): Frost days (min	44	186	1970	168
-10 C (14 F): Days with min	44	86	1975	63
-20 C (-4 F): Days with min	43	32	1985	17
-30 C (-22 F): Days with min	19	8	1989	1
20 C (68 F): Tropical nights (min	41	19	1988	10
25 C (77 F): Days with min	4	1	1974	1
10 mm (0.39 in): Days with 10 mm or more rain	45	26	1998	21
25 mm (0.98 in): Days with 25 mm or more rain	45	8	1999	7
50 mm (1.97 in): Days with 50 mm or more rain	18	2	1982	2
10 cm (3.9 in): Days with 10 cm or more snowfall	36	9	1996	3
25 cm (9.8 in): Days with 25 cm or more snowfall	8	3	2009	1
50 cm (19.7 in): Days with 50 cm or more snowfall	1	0	n/a	1

Years with under 90 percent of days observed are left out of the most days column. Threshold history at this station starts in 1967.

Download the Data

Data for Mission 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).

Mission Threshold Days by Year (USC00395620)

Key Facts for Mission Thresholds

Days at or above 30 C (86 F)

Every Fixed Threshold

Download the Data

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