Three Rivers Threshold Days by Year

14 fixed thresholds counted per year at Three Rivers (ASN00007080): hot days, frost, tropical nights and heavy rain, with the most days in a year.

Key Facts for Three Rivers Thresholds

Three Rivers: days with 10 mm (0.39 in) or more of precipitation in 84 years, most in 1942 with 17.
Three Rivers: days with 25 mm (0.98 in) or more of precipitation in 70 years, most in 1931 with 7.
Three Rivers: days with 50 mm (1.97 in) or more of precipitation in 32 years, most in 1909 with 2.
Three Rivers: days with a maximum temperature at or above 30 C (86 F) in 13 years, most in 1977 with 208.
14 fixed thresholds have at least one qualifying day at Three Rivers.

Days at or above 30 C (86 F)

13 years with a qualifying day

Days per year at Three Rivers with a maximum temperature at or above 30 C (86 F), with the decade average as a line. The most was 208 in 1977.

Days at or above 30 C (86 F) per year at Three Rivers
Year	Days	Decade average
1968	171	171
1970	192	183.2
1971	166	183.2
1972	206	183.2
1973	173	183.2
1974	168	183.2
1975	148	183.2
1977	208	183.2
1978	201	183.2
1979	187	183.2
1982	190	190.5
1983	191	190.5
1996	180	180

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

First to last qualifying date each year at Three Rivers
Year	First date	Last date
1968	1968-01-01	1968-12-31
1970	1970-01-01	1970-12-31
1971	1971-01-01	1971-12-31
1972	1972-01-01	1972-12-31
1973	1973-01-01	1973-12-31
1974	1974-01-01	1974-12-31
1975	1975-01-01	1975-12-31
1977	1977-01-01	1977-12-31
1978	1978-01-01	1978-12-31
1979	1979-01-01	1979-12-31
1982	1982-01-01	1982-12-30
1983	1983-01-02	1983-12-31
1996	1996-01-01	1996-12-31

Every Fixed Threshold

Fixed thresholds at Three Rivers
Threshold	Years with a qualifying day	Most days in a year	Year	Latest year days
30 C (86 F): Days	13	208	1977	180
35 C (95 F): Days	13	149	1970	117
40 C (104 F): Days	13	50	1970	42
45 C (113 F): Days	1	15	1977	15
90 F (32.2 C): Days	13	182	1978	144
100 F (37.8 C): Days	13	103	1970	68
110 F (43.3 C): Days	12	24	1977	1
0 C (32 F): Frost days (min	13	17	1977	3
20 C (68 F): Tropical nights (min	13	119	1979	110
25 C (77 F): Days with min	13	51	1979	26
10 mm (0.39 in): Days with 10 mm or more rain	84	17	1942	8
25 mm (0.98 in): Days with 25 mm or more rain	70	7	1931	2
50 mm (1.97 in): Days with 50 mm or more rain	32	2	1909	1
100 mm (3.94 in): Days with 100 mm or more rain	2	1	1934	1

Years with under 90 percent of days observed are left out of the most days column. Threshold history at this station starts in 1968.

Download the Data

Data for Three Rivers 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 2026-10-16 (16 October 2026). Threshold counts are computed by this site.

Data as of 2026-10-16. Last revised 16 October 2026 (2026-10-16).

Three Rivers Threshold Days by Year

Key Facts for Three Rivers Thresholds

Days at or above 30 C (86 F)

Every Fixed Threshold

Download the Data

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