Aikawa Threshold Days by Year (JA000047602)

12 fixed thresholds counted per year at Aikawa (JA000047602): hot days, frost, tropical nights and heavy rain, with the most days in a year.

Key Facts for Aikawa Thresholds

Aikawa: days with 10 mm (0.39 in) or more of precipitation in 53 years, most in 1961 with 70.
Aikawa: days with 25 mm (0.98 in) or more of precipitation in 53 years, most in 1958 with 23.
Aikawa: days with 50 mm (1.97 in) or more of precipitation in 47 years, most in 1953 with 5.
Aikawa: days with a maximum temperature at or above 30 C (86 F) in 42 years, most in 2025 with 40.
12 fixed thresholds have at least one qualifying day at Aikawa.

Days at or above 30 C (86 F)

42 years with a qualifying day

Days per year at Aikawa with a maximum temperature at or above 30 C (86 F), with the decade average as a line. The most was 40 in 2025.

Days at or above 30 C (86 F) per year at Aikawa
Year	Days	Decade average
1951	23	14.1
1952	12	14.1
1953	12	14.1
1954	19	14.1
1955	30	14.1
1956	15	14.1
1957	10	14.1
1958	1	14.1
1959	5	14.1
1960	20	16
1961	34	16
1962	28	16
1963	13	16
1964	18	16
1965	10	16
1966	12	16
1967	9	16
1968	10	16
1969	6	16
1970	19	18.3
1971	17	18.3
1972	10	18.3
1973	31	18.3
1974	11	18.3
1975	31	18.3
1976	6	18.3
1977	13	18.3
1978	39	18.3
1979	6	18.3
1980	3	15.7
1981	15	15.7
1982	6	15.7
1983	15	15.7
1984	30	15.7
1985	35	15.7
1986	13	15.7
1987	7	15.7
1988	14	15.7
1989	19	15.7
1990	16	16
2025	40	28.5
2026	17	28.5

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

First to last qualifying date each year at Aikawa
Year	First date	Last date
1951	1951-07-10	1951-08-30
1952	1952-07-22	1952-08-31
1953	1953-07-27	1953-08-17
1954	1954-08-01	1954-09-26
1955	1955-07-11	1955-09-30
1956	1956-07-26	1956-09-10
1957	1957-07-29	1957-08-24
1958	1958-09-05	1958-09-05
1959	1959-08-01	1959-09-17
1960	1960-07-22	1960-08-29
1961	1961-07-20	1961-09-16
1962	1962-07-09	1962-09-08
1963	1963-06-20	1963-08-15
1964	1964-08-01	1964-08-24
1965	1965-07-29	1965-09-16
1966	1966-07-26	1966-08-31
1967	1967-07-20	1967-08-23
1968	1968-07-25	1968-08-17
1969	1969-07-18	1969-09-03
1970	1970-07-23	1970-09-04
1971	1971-07-07	1971-08-27
1972	1972-07-20	1972-08-10
1973	1973-07-16	1973-09-01
1974	1974-07-25	1974-09-02
1975	1975-07-26	1975-09-07
1976	1976-07-09	1976-09-08
1977	1977-06-29	1977-09-11
1978	1978-06-19	1978-08-29
1979	1979-06-22	1979-08-18
1980	1980-08-14	1980-09-12
1981	1981-07-09	1981-08-29
1982	1982-07-11	1982-08-29
1983	1983-08-05	1983-09-06
1984	1984-06-17	1984-08-22
1985	1985-08-01	1985-09-07
1986	1986-07-12	1986-09-21
1987	1987-07-16	1987-09-07
1988	1988-08-10	1988-08-27
1989	1989-07-24	1989-08-30
1990	1990-07-12	1990-09-02
2025	2025-06-21	2025-09-07
2026	2026-07-09	2026-09-01

Every Fixed Threshold

Fixed thresholds at Aikawa
Threshold	Years with a qualifying day	Most days in a year	Year	Latest year days
30 C (86 F): Days	42	40	2025	17
35 C (95 F): Days	6	2	1971	1
90 F (32.2 C): Days	37	14	1985	2
0 C (32 F): Ice days (max	33	11	1984	1
0 C (32 F): Frost days (min	41	73	1970	11
20 C (68 F): Tropical nights (min	41	95	2025	80
25 C (77 F): Days with min	36	35	2025	30
10 mm (0.39 in): Days with 10 mm or more rain	53	70	1961	19
25 mm (0.98 in): Days with 25 mm or more rain	53	23	1958	17
50 mm (1.97 in): Days with 50 mm or more rain	47	5	1953	13
100 mm (3.94 in): Days with 100 mm or more rain	12	3	1961	10
200 mm (7.87 in): Days with 200 mm or more rain	1	0	n/a	5

Years with under 90 percent of days observed are left out of the most days column. Threshold history at this station starts in 1951.

Download the Data

Data for Aikawa 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 2026-10-17. Last revised 17 October 2026 (2026-10-17).

Aikawa Threshold Days by Year (JA000047602)

Key Facts for Aikawa Thresholds

Days at or above 30 C (86 F)

Every Fixed Threshold

Download the Data

Related