Ascencion (Smn) Threshold Days by Year (MXN00008001)

18 fixed thresholds counted per year at Ascencion (Smn) (MXN00008001): hot days, frost, tropical nights and heavy rain, with the most days in a year.

Key Facts for Ascencion (Smn) Thresholds

Ascencion (Smn): days with 10 mm (0.39 in) or more of precipitation in 49 years, most in 1971 with 13.
Ascencion (Smn): days with 25 mm (0.98 in) or more of precipitation in 32 years, most in 1997 with 6.
Ascencion (Smn): nights with a minimum temperature at or below 0 C (32 F) in 29 years, most in 1973 with 152.
Ascencion (Smn): nights with a minimum temperature at or above 20 C (68 F) in 29 years, most in 1989 with 44.
18 fixed thresholds have at least one qualifying day at Ascencion (Smn).

Days at or above 30 C (86 F)

24 years with a qualifying day

Days per year at Ascencion (Smn) with a maximum temperature at or above 30 C (86 F), with the decade average as a line. The most was 227 in 1996.

Days at or above 30 C (86 F) per year at Ascencion (Smn)
Year	Days	Decade average
1967	157	143.7
1968	135	143.7
1969	139	143.7
1970	140	126
1971	129	126
1972	153	126
1973	109	126
1974	136	126
1976	109	126
1977	109	126
1978	129	126
1979	120	126
1980	127	154.8
1986	130	154.8
1988	168	154.8
1989	194	154.8
1990	150	160.1
1991	148	160.1
1992	156	160.1
1993	196	160.1
1996	227	160.1
1997	140	160.1
1999	104	160.1
2003	139	139

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

First to last qualifying date each year at Ascencion (Smn)
Year	First date	Last date
1967	1967-03-17	1967-10-27
1968	1968-04-28	1968-10-29
1969	1969-04-02	1969-10-18
1970	1970-04-15	1970-10-13
1971	1971-03-26	1971-09-29
1972	1972-03-07	1972-10-17
1973	1973-05-10	1973-10-22
1974	1974-03-16	1974-10-10
1976	1976-05-02	1976-09-30
1977	1977-05-02	1977-11-02
1978	1978-03-28	1978-10-12
1979	1979-04-14	1979-09-30
1980	1980-04-19	1980-10-05
1986	1986-04-07	1986-10-01
1988	1988-03-24	1988-10-31
1989	1989-03-13	1989-10-28
1990	1990-03-20	1990-11-15
1991	1991-05-06	1991-10-20
1992	1992-04-11	1992-10-27
1993	1993-04-18	1993-12-26
1996	1996-01-10	1996-11-20
1997	1997-03-24	1997-11-02
1999	1999-05-04	1999-10-07
2003	2003-04-28	2003-12-18

Every Fixed Threshold

Fixed thresholds at Ascencion (Smn)
Threshold	Years with a qualifying day	Most days in a year	Year	Latest year days
30 C (86 F): Days	24	227	1996	139
35 C (95 F): Days	24	136	1996	38
40 C (104 F): Days	18	69	1996	6
45 C (113 F): Days	4	35	1996	35
50 C (122 F): Days	1	3	1996	3
90 F (32.2 C): Days	24	174	1996	63
100 F (37.8 C): Days	24	92	1996	15
110 F (43.3 C): Days	4	48	1996	48
120 F (48.9 C): Days	2	4	1996	4
0 C (32 F): Ice days (max	2	1	1972	1
0 C (32 F): Frost days (min	29	152	1973	24
-10 C (14 F): Days with min	17	27	1973	2
-20 C (-4 F): Days with min	1	1	1910	1
20 C (68 F): Tropical nights (min	29	44	1989	8
25 C (77 F): Days with min	5	7	1907	1
10 mm (0.39 in): Days with 10 mm or more rain	49	13	1971	3
25 mm (0.98 in): Days with 25 mm or more rain	32	6	1997	6
50 mm (1.97 in): Days with 50 mm or more rain	13	1	1907	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 Ascencion (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).

Ascencion (Smn) Threshold Days by Year (MXN00008001)

Key Facts for Ascencion (Smn) Thresholds

Days at or above 30 C (86 F)

Every Fixed Threshold

Download the Data

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