Chillicothe Mound City Threshold Days by Year (USC00331528)

17 fixed thresholds counted per year at Chillicothe Mound City (USC00331528): hot days, frost, tropical nights and heavy rain, with the most days in a year.

Key Facts for Chillicothe Mound City Thresholds

Chillicothe Mound City: days with 10 mm (0.39 in) or more of precipitation in 30 years, most in 1996 with 44.
Chillicothe Mound City: days with 25 mm (0.98 in) or more of precipitation in 30 years, most in 1990 with 15.
Chillicothe Mound City: days with a maximum temperature at or above 30 C (86 F) in 29 years, most in 1991 with 84.
Chillicothe Mound City: days with a maximum temperature at or above 90 F (32.2 C) in 29 years, most in 1983 with 55.
17 fixed thresholds have at least one qualifying day at Chillicothe Mound City.

Days at or above 30 C (86 F)

29 years with a qualifying day

Days per year at Chillicothe Mound City with a maximum temperature at or above 30 C (86 F), with the decade average as a line. The most was 84 in 1991.

Days at or above 30 C (86 F) per year at Chillicothe Mound City
Year	Days	Decade average
1973	56	56.7
1974	40	56.7
1975	64	56.7
1976	45	56.7
1977	76	56.7
1978	65	56.7
1979	51	56.7
1980	71	58.3
1981	52	58.3
1982	56	58.3
1983	83	58.3
1984	65	58.3
1985	42	58.3
1986	61	58.3
1988	63	58.3
1989	32	58.3
1990	36	42.6
1991	84	42.6
1992	14	42.6
1993	57	42.6
1994	27	42.6
1995	48	42.6
1996	37	42.6
1997	20	42.6
1998	40	42.6
1999	63	42.6
2000	28	42.3
2001	39	42.3
2002	60	42.3

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

First to last qualifying date each year at Chillicothe Mound City
Year	First date	Last date
1973	1973-06-04	1973-10-05
1974	1974-05-15	1974-08-28
1975	1975-05-20	1975-09-06
1976	1976-04-18	1976-09-14
1977	1977-04-19	1977-09-19
1978	1978-05-20	1978-09-22
1979	1979-05-08	1979-09-13
1980	1980-05-05	1980-09-22
1981	1981-05-25	1981-09-27
1982	1982-05-06	1982-10-07
1983	1983-06-11	1983-10-04
1984	1984-04-27	1984-09-26
1985	1985-04-22	1985-09-24
1986	1986-04-27	1986-10-01
1988	1988-05-16	1988-08-28
1989	1989-05-31	1989-09-22
1990	1990-04-27	1990-09-07
1991	1991-05-14	1991-09-18
1992	1992-06-18	1992-08-28
1993	1993-05-10	1993-09-15
1994	1994-06-07	1994-09-17
1995	1995-06-20	1995-09-07
1996	1996-05-19	1996-09-09
1997	1997-06-21	1997-10-05
1998	1998-05-15	1998-09-28
1999	1999-05-13	1999-09-29
2000	2000-05-07	2000-09-03
2001	2001-04-10	2001-09-10
2002	2002-04-17	2002-09-19

Every Fixed Threshold

Fixed thresholds at Chillicothe Mound City
Threshold	Years with a qualifying day	Most days in a year	Year	Latest year days
30 C (86 F): Days	29	84	1991	60
35 C (95 F): Days	18	22	1988	3
40 C (104 F): Days	1	1	1983	1
90 F (32.2 C): Days	29	55	1983	25
100 F (37.8 C): Days	3	8	1988	1
0 C (32 F): Ice days (max	29	44	1979	10
0 C (32 F): Frost days (min	26	138	1974	111
-10 C (14 F): Days with min	26	44	1977	13
-20 C (-4 F): Days with min	14	16	1977	6
-30 C (-22 F): Days with min	1	2	1994	2
20 C (68 F): Tropical nights (min	26	31	1995	17
25 C (77 F): Days with min	3	2	1998	1
10 mm (0.39 in): Days with 10 mm or more rain	30	44	1996	38
25 mm (0.98 in): Days with 25 mm or more rain	30	15	1990	9
50 mm (1.97 in): Days with 50 mm or more rain	18	4	1990	3
100 mm (3.94 in): Days with 100 mm or more rain	2	1	1974	1
10 cm (3.9 in): Days with 10 cm or more snowfall	19	4	1984	1

Years with under 90 percent of days observed are left out of the most days column. Threshold history at this station starts in 1973.

Download the Data

Data for Chillicothe Mound City 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).

Chillicothe Mound City Threshold Days by Year (USC00331528)

Key Facts for Chillicothe Mound City Thresholds

Days at or above 30 C (86 F)

Every Fixed Threshold

Download the Data

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