Grosseto Threshold Days by Year (ITM00016206)

13 fixed thresholds counted per year at Grosseto (ITM00016206): hot days, frost, tropical nights and heavy rain, with the most days in a year.

Key Facts for Grosseto Thresholds

Grosseto: days with 10 mm (0.39 in) or more of precipitation in 21 years, most in 1979 with 28.
Grosseto: days with 25 mm (0.98 in) or more of precipitation in 21 years, most in 1980 with 13.
Grosseto: days with a maximum temperature at or above 30 C (86 F) in 20 years, most in 2003 with 88.
Grosseto: days with a maximum temperature at or above 90 F (32.2 C) in 20 years, most in 2003 with 62.
13 fixed thresholds have at least one qualifying day at Grosseto.

Days at or above 30 C (86 F)

20 years with a qualifying day

Days per year at Grosseto with a maximum temperature at or above 30 C (86 F), with the decade average as a line. The most was 88 in 2003.

Days at or above 30 C (86 F) per year at Grosseto
Year	Days	Decade average
1967	47	35
1968	23	35
1970	51	33.1
1973	54	33.1
1974	36	33.1
1975	42	33.1
1976	17	33.1
1977	7	33.1
1978	23	33.1
1979	35	33.1
1980	22	33.2
1981	29	33.2
1985	39	33.2
1988	46	33.2
1989	30	33.2
2000	49	61.8
2001	65	61.8
2003	88	61.8
2007	45	61.8
2025	46	46

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

First to last qualifying date each year at Grosseto
Year	First date	Last date
1967	1967-06-30	1967-09-07
1968	1968-06-26	1968-09-09
1970	1970-06-16	1970-09-23
1973	1973-06-12	1973-09-11
1974	1974-06-17	1974-09-13
1975	1975-06-23	1975-09-19
1976	1976-06-21	1976-10-01
1977	1977-07-11	1977-09-04
1978	1978-07-13	1978-08-24
1979	1979-05-30	1979-08-22
1980	1980-07-23	1980-09-01
1981	1981-06-11	1981-10-14
1985	1985-07-06	1985-09-27
1988	1988-07-05	1988-09-07
1989	1989-06-25	1989-08-26
2000	2000-06-08	2000-09-12
2001	2001-05-26	2001-10-12
2003	2003-05-28	2003-09-03
2007	2007-05-23	2007-09-02
2025	2025-05-31	2025-08-20

Every Fixed Threshold

Fixed thresholds at Grosseto
Threshold	Years with a qualifying day	Most days in a year	Year	Latest year days
30 C (86 F): Days	20	88	2003	46
35 C (95 F): Days	13	33	2003	12
40 C (104 F): Days	1	2	2003	2
90 F (32.2 C): Days	20	62	2003	24
100 F (37.8 C): Days	7	10	2003	2
0 C (32 F): Frost days (min	1	0	n/a	1
20 C (68 F): Tropical nights (min	1	0	n/a	22
25 C (77 F): Days with min	1	0	n/a	1
10 mm (0.39 in): Days with 10 mm or more rain	21	28	1979	10
25 mm (0.98 in): Days with 25 mm or more rain	21	13	1980	2
50 mm (1.97 in): Days with 50 mm or more rain	14	2	1980	1
100 mm (3.94 in): Days with 100 mm or more rain	5	2	1980	1
200 mm (7.87 in): Days with 200 mm or more rain	1	1	1975	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 Grosseto 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).

Grosseto Threshold Days by Year (ITM00016206)

Key Facts for Grosseto Thresholds

Days at or above 30 C (86 F)

Every Fixed Threshold

Download the Data

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