San Pedro Chenalho (Smn) Threshold Days by Year (MXN00007033)

11 fixed thresholds counted per year at San Pedro Chenalho (Smn) (MXN00007033): hot days, frost, tropical nights and heavy rain, with the most days in a year.

Key Facts for San Pedro Chenalho (Smn) Thresholds

San Pedro Chenalho (Smn): days with 10 mm (0.39 in) or more of precipitation in 40 years, most in 1972 with 158.
San Pedro Chenalho (Smn): days with 25 mm (0.98 in) or more of precipitation in 40 years, most in 1966 with 51.
San Pedro Chenalho (Smn): days with 50 mm (1.97 in) or more of precipitation in 33 years, most in 1967 with 16.
San Pedro Chenalho (Smn): days with a maximum temperature at or above 30 C (86 F) in 22 years, most in 1973 with 49.
11 fixed thresholds have at least one qualifying day at San Pedro Chenalho (Smn).

Days at or above 30 C (86 F)

22 years with a qualifying day

Days per year at San Pedro Chenalho (Smn) with a maximum temperature at or above 30 C (86 F), with the decade average as a line. The most was 49 in 1973.

Days at or above 30 C (86 F) per year at San Pedro Chenalho (Smn)
Year	Days	Decade average
1940	28	10.5
1942	11	10.5
1948	2	10.5
1949	1	10.5
1967	27	28.3
1968	21	28.3
1969	37	28.3
1970	31	21.5
1971	23	21.5
1972	29	21.5
1973	49	21.5
1974	8	21.5
1975	19	21.5
1976	2	21.5
1979	11	21.5
1980	14	9.6
1981	5	9.6
1982	4	9.6
1983	23	9.6
1984	17	9.6
1985	1	9.6
1986	3	9.6

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

First to last qualifying date each year at San Pedro Chenalho (Smn)
Year	First date	Last date
1940	1940-01-11	1940-10-04
1942	1942-02-17	1942-04-05
1948	1948-04-02	1948-04-03
1949	1949-09-29	1949-09-29
1967	1967-03-05	1967-06-30
1968	1968-03-10	1968-06-06
1969	1969-02-15	1969-09-01
1970	1970-02-15	1970-05-31
1971	1971-04-18	1971-09-15
1972	1972-03-02	1972-05-25
1973	1973-02-01	1973-05-31
1974	1974-02-21	1974-05-13
1975	1975-03-18	1975-05-31
1976	1976-04-07	1976-05-13
1979	1979-03-22	1979-05-09
1980	1980-03-24	1980-05-31
1981	1981-03-04	1981-06-03
1982	1982-03-14	1982-04-02
1983	1983-03-04	1983-05-21
1984	1984-03-19	1984-05-04
1985	1985-03-30	1985-03-30
1986	1986-03-12	1986-03-15

Every Fixed Threshold

Fixed thresholds at San Pedro Chenalho (Smn)
Threshold	Years with a qualifying day	Most days in a year	Year	Latest year days
30 C (86 F): Days	22	49	1973	3
35 C (95 F): Days	3	5	1973	1
40 C (104 F): Days	1	2	1940	2
90 F (32.2 C): Days	12	20	1973	1
100 F (37.8 C): Days	1	2	1940	2
0 C (32 F): Frost days (min	5	19	1967	2
20 C (68 F): Tropical nights (min	3	43	1948	1
10 mm (0.39 in): Days with 10 mm or more rain	40	158	1972	80
25 mm (0.98 in): Days with 25 mm or more rain	40	51	1966	43
50 mm (1.97 in): Days with 50 mm or more rain	33	16	1967	14
100 mm (3.94 in): Days with 100 mm or more rain	3	2	1967	1

Years with under 90 percent of days observed are left out of the most days column. Threshold history at this station starts in 1940.

Download the Data

Data for San Pedro Chenalho (Smn) 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).

San Pedro Chenalho (Smn) Threshold Days by Year (MXN00007033)

Key Facts for San Pedro Chenalho (Smn) Thresholds

Days at or above 30 C (86 F)

Every Fixed Threshold

Download the Data

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