Rosario Threshold Days by Year (MXN00010061)

10 fixed thresholds counted per year at Rosario (MXN00010061): hot days, frost, tropical nights and heavy rain, with the most days in a year.

Key Facts for Rosario Thresholds

Rosario: days with 10 mm (0.39 in) or more of precipitation in 40 years, most in 1966 with 28.
Rosario: nights with a minimum temperature at or below 0 C (32 F) in 39 years, most in 1997 with 120.
Rosario: days with a maximum temperature at or above 30 C (86 F) in 37 years, most in 2005 with 146.
Rosario: days with a maximum temperature at or above 90 F (32.2 C) in 36 years, most in 1994 with 88.
10 fixed thresholds have at least one qualifying day at Rosario.

Days at or above 30 C (86 F)

37 years with a qualifying day

Days per year at Rosario with a maximum temperature at or above 30 C (86 F), with the decade average as a line. The most was 146 in 2005.

Days at or above 30 C (86 F) per year at Rosario
Year	Days	Decade average
1965	140	114
1966	101	114
1967	123	114
1968	72	114
1969	134	114
1970	116	92.9
1971	95	92.9
1972	109	92.9
1974	79	92.9
1975	69	92.9
1976	61	92.9
1977	108	92.9
1978	118	92.9
1979	81	92.9
1980	50	35.8
1981	36	35.8
1984	11	35.8
1985	38	35.8
1986	43	35.8
1987	37	35.8
1990	59	78.8
1991	39	78.8
1992	56	78.8
1993	79	78.8
1994	119	78.8
1995	65	78.8
1996	86	78.8
1997	84	78.8
1998	122	78.8
2000	43	86.9
2001	36	86.9
2002	43	86.9
2003	93	86.9
2004	96	86.9
2005	146	86.9
2006	116	86.9
2007	122	86.9

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

First to last qualifying date each year at Rosario
Year	First date	Last date
1965	1965-03-28	1965-11-19
1966	1966-03-21	1966-09-25
1967	1967-03-12	1967-10-06
1968	1968-03-30	1968-10-13
1969	1969-04-01	1969-10-26
1970	1970-03-31	1970-11-22
1971	1971-03-13	1971-10-22
1972	1972-02-23	1972-12-10
1974	1974-03-02	1974-08-21
1975	1975-03-21	1975-09-18
1976	1976-03-18	1976-10-09
1977	1977-03-15	1977-10-30
1978	1978-04-15	1978-10-09
1979	1979-03-27	1979-11-05
1980	1980-04-20	1980-08-03
1981	1981-05-16	1981-06-30
1984	1984-04-24	1984-09-10
1985	1985-03-10	1985-10-07
1986	1986-03-31	1986-09-29
1987	1987-04-17	1987-08-09
1990	1990-04-29	1990-07-05
1991	1991-04-29	1991-07-01
1992	1992-06-04	1992-09-08
1993	1993-04-22	1993-08-28
1994	1994-04-14	1994-10-06
1995	1995-05-01	1995-09-17
1996	1996-05-01	1996-08-02
1997	1997-05-03	1997-09-20
1998	1998-05-02	1998-09-28
2000	2000-05-01	2000-09-06
2001	2001-04-20	2001-07-01
2002	2002-04-30	2002-07-09
2003	2003-05-07	2003-09-25
2004	2004-03-25	2004-10-20
2005	2005-03-28	2005-11-09
2006	2006-02-19	2006-11-08
2007	2007-03-01	2007-10-21

Every Fixed Threshold

Fixed thresholds at Rosario
Threshold	Years with a qualifying day	Most days in a year	Year	Latest year days
30 C (86 F): Days	37	146	2005	122
35 C (95 F): Days	34	53	1994	9
90 F (32.2 C): Days	36	88	1994	38
100 F (37.8 C): Days	6	3	1969	1
0 C (32 F): Frost days (min	39	120	1997	79
-10 C (14 F): Days with min	21	8	1971	1
20 C (68 F): Tropical nights (min	4	2	1980	1
10 mm (0.39 in): Days with 10 mm or more rain	40	28	1966	10
25 mm (0.98 in): Days with 25 mm or more rain	32	10	1967	1
50 mm (1.97 in): Days with 50 mm or more rain	11	4	1968	1

Years with under 90 percent of days observed are left out of the most days column. Threshold history at this station starts in 1965.

Download the Data

Data for Rosario 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).

Rosario Threshold Days by Year (MXN00010061)

Key Facts for Rosario Thresholds

Days at or above 30 C (86 F)

Every Fixed Threshold

Download the Data

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