Chillicothe Radio Kchi Weather Records (USW00013982)

Record envelope, standing records and threshold days for Chillicothe Radio Kchi (USW00013982), Missouri, United States, with 64 years of record.

Key Facts for Chillicothe Radio Kchi

Chillicothe Radio Kchi (USW00013982) is a weather station in Missouri, United States at 39.80 latitude and -93.55 longitude, 241 m (791 ft) above sea level.
The station reports from 1917 to 1980, 64 years of record.
1,464 records set at Chillicothe Radio Kchi still stand.
Records are tracked for tmax, tmin, prcp, snow, snwd: an element needs 30 years of data to be eligible.
Chillicothe Radio Kchi set a daily record low minimum temperature of 2.8 C (37.0 F) on 17 September 1980.

About the Station

Location: Missouri, United States, 39.80 latitude, -93.55 longitude.
Elevation: 241 m (791 ft).
Period of record: 1917 to 1980, 64 years.
Eligible elements: tmax, tmin, prcp, snow, snwd.

Daily Record Envelope and 2026

0 days at or beyond a record

The band shows the record high and record low for each calendar day at Chillicothe Radio Kchi. The lines show the 2026 daily maximum and minimum. 0 days in 2026 matched or passed a record. Temperatures are in degrees Celsius.

Daily record high and record low at Chillicothe Radio Kchi, with 2026 drawn through them
Month	Highest record high	Lowest record low	2026 highest maximum	2026 lowest minimum
Jan	22.2 C (72.0 F)	-33.9 C (-29.0 F)	n/a	n/a
Feb	28.3 C (82.9 F)	-30.6 C (-23.1 F)	n/a	n/a
Mar	31.1 C (88.0 F)	-27.2 C (-17.0 F)	n/a	n/a
Apr	34.4 C (93.9 F)	-15.0 C (5.0 F)	n/a	n/a
May	38.3 C (100.9 F)	-1.7 C (28.9 F)	n/a	n/a
Jun	43.3 C (109.9 F)	4.4 C (39.9 F)	n/a	n/a
Jul	46.7 C (116.1 F)	8.3 C (46.9 F)	n/a	n/a
Aug	45.6 C (114.1 F)	5.6 C (42.1 F)	n/a	n/a
Sep	40.6 C (105.1 F)	-4.4 C (24.1 F)	n/a	n/a
Oct	37.2 C (99.0 F)	-15.6 C (3.9 F)	n/a	n/a
Nov	28.9 C (84.0 F)	-20.6 C (-5.1 F)	n/a	n/a
Dec	21.7 C (71.1 F)	-31.7 C (-25.1 F)	n/a	n/a

Which Years Hold Standing Records

1,464 standing records

1,464 records at Chillicothe Radio Kchi still stand. 1936 holds the most, with 92.

Standing records at Chillicothe Radio Kchi by the year they were set
Year set	Standing records
1917	21
1918	36
1919	10
1920	12
1921	11
1922	5
1923	23
1924	36
1925	29
1926	25
1927	20
1928	27
1929	32
1930	38
1931	30
1932	25
1933	27
1934	57
1935	24
1936	92
1937	18
1938	29
1939	28
1940	26
1941	25
1942	17
1943	18
1944	21
1945	22
1946	32
1947	19
1948	16
1949	15
1950	33
1951	23
1952	26
1953	24
1954	18
1955	18
1956	31
1957	11
1958	19
1959	14
1960	21
1961	14
1962	26
1963	29
1964	15
1965	28
1966	26
1967	17
1968	14
1969	6
1970	18
1971	11
1972	20
1973	12
1974	19
1975	15
1976	31
1977	13
1978	11
1979	16
1980	19

All-Time Record Progression

2 new records

2 all-time records were set at Chillicothe Radio Kchi between 15 July 1958 and 16 March 1960. Each dot is a new record.

When Chillicothe Radio Kchi set new all-time records
Date	Kind	Detail
1958-07-15	Record daily precipitation	Record daily precipitation 181.9 mm (7.2 in)
1960-03-16	Record snow depth	Record snow depth 50.8 cm (20.0 in)

Wettest Day of Each Month

Jul: 181.9 mm (7.2 in)

The wettest day on record for each calendar month at Chillicothe Radio Kchi. The most was 181.9 mm (7.2 in) on 15 July 1958.

Record daily precipitation for each month at Chillicothe Radio Kchi
Month	Record daily precipitation (mm)	Date
Jan	71.1 mm (2.8 in)	1 January 1965
Feb	42.2 mm (1.7 in)	23 February 1925
Mar	55.9 mm (2.2 in)	4 March 1976
Apr	63.8 mm (2.5 in)	24 April 1975
May	94.0 mm (3.7 in)	28 May 1935
Jun	143.8 mm (5.7 in)	21 June 1939
Jul	181.9 mm (7.2 in)	15 July 1958
Aug	123.2 mm (4.9 in)	2 August 1956
Sep	122.7 mm (4.8 in)	13 September 1961
Oct	156.2 mm (6.1 in)	1 October 1927
Nov	108.0 mm (4.3 in)	17 November 1928
Dec	68.6 mm (2.7 in)	15 December 1971

Period of Record Coverage

1917 to 1980

64 years of record at Chillicothe Radio Kchi, 1917 to 1980. 7 years have data for under 90 percent of days and are left out of rankings: 1917, 1920, 1921, 1922, 1930, 1951, 1980.

Days with data per year at Chillicothe Radio Kchi
Year	Days with data	Share of year	Complete
1917	245	67%	No
1918	343	94%	Yes
1919	355	97%	Yes
1920	287	78%	No
1921	209	57%	No
1922	285	78%	No
1923	339	93%	Yes
1924	338	92%	Yes
1925	343	94%	Yes
1926	340	93%	Yes
1927	338	93%	Yes
1928	350	96%	Yes
1929	347	95%	Yes
1930	322	88%	No
1931	355	97%	Yes
1932	345	94%	Yes
1933	346	95%	Yes
1934	343	94%	Yes
1935	342	94%	Yes
1936	348	95%	Yes
1937	343	94%	Yes
1938	342	94%	Yes
1939	346	95%	Yes
1940	348	95%	Yes
1941	338	93%	Yes
1942	333	91%	Yes
1943	343	94%	Yes
1944	341	93%	Yes
1945	341	93%	Yes
1946	354	97%	Yes
1947	365	100%	Yes
1948	366	100%	Yes
1949	365	100%	Yes
1950	338	93%	Yes
1951	307	84%	No
1952	365	100%	Yes
1953	364	100%	Yes
1954	364	100%	Yes
1955	365	100%	Yes
1956	365	100%	Yes
1957	365	100%	Yes
1958	365	100%	Yes
1959	363	99%	Yes
1960	366	100%	Yes
1961	365	100%	Yes
1962	365	100%	Yes
1963	365	100%	Yes
1964	366	100%	Yes
1965	365	100%	Yes
1966	365	100%	Yes
1967	365	100%	Yes
1968	366	100%	Yes
1969	364	100%	Yes
1970	364	100%	Yes
1971	365	100%	Yes
1972	365	100%	Yes
1973	365	100%	Yes
1974	365	100%	Yes
1975	364	100%	Yes
1976	361	99%	Yes
1977	364	100%	Yes
1978	365	100%	Yes
1979	362	99%	Yes
1980	272	74%	No

Latest Records

Latest records at Chillicothe Radio Kchi
Date	Station	Record	Value	Beat old record by	Old record stood	Significance
17 September 1980	Chillicothe Radio Kchi, US	daily low min	2.8 C (37.0 F)	1.6 C (2.9 F)	62 years	27 of 100 (Routine)
1 September 1980	Chillicothe Radio Kchi, US	daily rain	61.0 mm (2.4 in)	0.8 mm (0.03 in)	29 years	14 of 100 (Routine)
29 August 1980	Chillicothe Radio Kchi, US	daily high max (Tie)	35.6 C (96.1 F)	tie	35 years	4 of 100 (Routine)
11 August 1980	Chillicothe Radio Kchi, US	daily rain	22.6 mm (0.9 in)	4.8 mm (0.19 in)	4 years	10 of 100 (Routine)
1 August 1980	Chillicothe Radio Kchi, US	daily high max	42.2 C (108.0 F)	2.2 C (4.0 F)	49 years	25 of 100 (Routine)
31 July 1980	Chillicothe Radio Kchi, US	daily high max	42.8 C (109.0 F)	1.1 C (2.0 F)	49 years	22 of 100 (Routine)
30 July 1980	Chillicothe Radio Kchi, US	daily high max	43.9 C (111.0 F)	1.1 C (2.0 F)	49 years	22 of 100 (Routine)
20 July 1980	Chillicothe Radio Kchi, US	daily high min	25.6 C (78.1 F)	1.7 C (3.1 F)	46 years	24 of 100 (Routine)
18 July 1980	Chillicothe Radio Kchi, US	daily high min (Tie)	24.4 C (75.9 F)	tie	59 years	5 of 100 (Routine)
16 July 1980	Chillicothe Radio Kchi, US	daily high max	43.9 C (111.0 F)	1.7 C (3.1 F)	44 years	23 of 100 (Routine)
15 July 1980	Chillicothe Radio Kchi, US	daily high min	25.6 C (78.1 F)	1.2 C (2.2 F)	46 years	22 of 100 (Routine)
14 July 1980	Chillicothe Radio Kchi, US	daily high min	25.6 C (78.1 F)	0.6 C (1.1 F)	46 years	20 of 100 (Routine)
13 July 1980	Chillicothe Radio Kchi, US	daily high min (Tie)	25.6 C (78.1 F)	tie	46 years	4 of 100 (Routine)
11 July 1980	Chillicothe Radio Kchi, US	daily high max (Tie)	41.7 C (107.1 F)	tie	44 years	4 of 100 (Routine)
10 July 1980	Chillicothe Radio Kchi, US	daily high max	42.2 C (108.0 F)	1.1 C (2.0 F)	44 years	21 of 100 (Routine)
10 July 1980	Chillicothe Radio Kchi, US	daily high min	27.2 C (81.0 F)	2.8 C (5.0 F)	25 years	21 of 100 (Routine)
9 July 1980	Chillicothe Radio Kchi, US	daily high max	41.1 C (106.0 F)	1.1 C (2.0 F)	44 years	21 of 100 (Routine)
8 July 1980	Chillicothe Radio Kchi, US	daily high max	40.6 C (105.1 F)	0.6 C (1.1 F)	46 years	20 of 100 (Routine)
7 July 1980	Chillicothe Radio Kchi, US	daily high max	40.6 C (105.1 F)	1.2 C (2.2 F)	44 years	22 of 100 (Routine)
28 June 1980	Chillicothe Radio Kchi, US	daily high min (Tie)	25.0 C (77.0 F)	tie	21 years	3 of 100 (Routine)

Climate Trend

56 complete years, 1918 to 1979

One stripe for each of 56 complete years at Chillicothe Radio Kchi, 1918 to 1979. Blue stripes are years cooler than the station's own mean of 12.0 C (53.6 F); red stripes are warmer. The coolest year was 1978, at 10.1 C (50.2 F), and the warmest was 1938, at 13.7 C (56.7 F). The strongest colour marks a difference of 1.9 C (3.4 F).

Annual mean temperature at Chillicothe Radio Kchi as warming stripes, 1918 to 1979
Year	Annual mean temperature	Difference from the station mean
1918	12.3 C	+0.32 C
1919	12.6 C	+0.54 C
1923	11.5 C	-0.48 C
1924	10.2 C	-1.84 C
1925	11.3 C	-0.76 C
1926	11.3 C	-0.69 C
1927	11.8 C	-0.20 C
1928	11.9 C	-0.16 C
1929	10.2 C	-1.82 C
1931	13.5 C	+1.48 C
1932	11.6 C	-0.40 C
1933	12.6 C	+0.61 C
1934	13.3 C	+1.25 C
1935	11.8 C	-0.25 C
1936	12.1 C	+0.09 C
1937	11.2 C	-0.80 C
1938	13.7 C	+1.73 C
1939	13.3 C	+1.25 C
1940	11.4 C	-0.62 C
1941	13.2 C	+1.22 C
1942	11.9 C	-0.10 C
1943	11.1 C	-0.92 C
1944	11.7 C	-0.31 C
1945	11.2 C	-0.81 C
1946	13.0 C	+0.96 C
1947	11.4 C	-0.60 C
1948	11.3 C	-0.75 C
1949	11.3 C	-0.72 C
1952	12.2 C	+0.22 C
1953	13.1 C	+1.07 C
1954	13.5 C	+1.47 C
1955	12.3 C	+0.33 C
1956	12.9 C	+0.90 C
1957	12.0 C	+0.03 C
1958	11.5 C	-0.50 C
1959	12.0 C	-0.02 C
1960	11.3 C	-0.76 C
1961	11.3 C	-0.74 C
1962	11.4 C	-0.61 C
1963	11.9 C	-0.11 C
1964	12.3 C	+0.33 C
1965	12.3 C	+0.24 C
1966	11.7 C	-0.28 C
1967	12.3 C	+0.27 C
1968	12.4 C	+0.43 C
1969	12.1 C	+0.10 C
1970	12.6 C	+0.58 C
1971	12.8 C	+0.78 C
1972	12.3 C	+0.25 C
1973	13.0 C	+0.97 C
1974	12.7 C	+0.66 C
1975	12.8 C	+0.78 C
1976	11.6 C	-0.40 C
1977	11.5 C	-0.47 C
1978	10.1 C	-1.88 C
1979	11.1 C	-0.88 C

The fitted trend in annual mean temperature here over 1918 to 1979 is 0.03 C (-0.10 to 0.16) per decade. The interval includes zero, so the trend is not clearly different from zero. In Fahrenheit: 0.1 F (-0.2 to 0.3) per decade. The slope is a straight line fitted to 56 complete years; the brackets give its 95 percent interval.

Fitted temperature trends per decade at Chillicothe Radio Kchi
Measure	Per decade (C)	Per decade (F)	Period	Complete years	Reading
Annual mean temperature	0.03 C (-0.10 to 0.16) per decade	0.1 F (-0.2 to 0.3) per decade	1918 to 1979	56	Not clearly different from zero
Mean daily maximum	-0.12 C (-0.29 to 0.04) per decade	-0.2 F (-0.5 to 0.1) per decade	1918 to 1979	56	Not clearly different from zero
Mean daily minimum	0.2 C (0.1 to 0.3) per decade	0.3 F (0.1 to 0.5) per decade	1918 to 1979	56	Rise

A year is complete when all 12 months have at least 20 days of both daily maximum and daily minimum readings. The annual mean is the mean of the monthly means. The trend describes this one station over this period; it does not say what caused the change.

Extremes by Year

1917 to 1980

Yearly extremes at Chillicothe Radio Kchi: the record and the median year
Measure	Record	Year of the record	Median year	Years with a value
Hottest day (TXx)	46.7 C (116.1 F)	1936	38.3 C (100.9 F)	64
Coldest night (TNn)	-33.9 C (-29.0 F)	1930	-24.4 C (-11.9 F)	64
Wettest day (Rx1day)	181.9 mm (7.2 in)	1958	68.6 mm (2.7 in)	64
Wettest five days (Rx5day)	243.3 mm (9.6 in)	1927	104.8 mm (4.1 in)	64
Longest dry spell (CDD)	46 days	1967	25 days	64

Hottest day (TXx)

The hottest day of the year at Chillicothe Radio Kchi, 1917 to 1980. The record is 46.7 C (116.1 F) in 1936, marked on the chart; the median year is 38.3 C (100.9 F).

Hottest day (TXx) at Chillicothe Radio Kchi by year
Year	Hottest day (TXx)
1917	38.9 C (102.0 F)
1918	43.3 C (109.9 F)
1919	40.0 C (104.0 F)
1920	36.7 C (98.1 F)
1921	37.8 C (100.0 F)
1922	36.7 C (98.1 F)
1923	36.7 C (98.1 F)
1924	35.6 C (96.1 F)
1925	37.8 C (100.0 F)
1926	39.4 C (102.9 F)
1927	36.7 C (98.1 F)
1928	36.1 C (97.0 F)
1929	38.3 C (100.9 F)
1930	42.2 C (108.0 F)
1931	42.8 C (109.0 F)
1932	40.6 C (105.1 F)
1933	39.4 C (102.9 F)
1934	45.6 C (114.1 F)
1935	40.0 C (104.0 F)
1936	46.7 C (116.1 F)
1937	39.4 C (102.9 F)
1938	40.0 C (104.0 F)
1939	40.6 C (105.1 F)
1940	41.1 C (106.0 F)
1941	39.4 C (102.9 F)
1942	36.1 C (97.0 F)
1943	38.9 C (102.0 F)
1944	36.1 C (97.0 F)
1945	38.9 C (102.0 F)
1946	38.9 C (102.0 F)
1947	40.6 C (105.1 F)
1948	37.2 C (99.0 F)
1949	35.6 C (96.1 F)
1950	35.6 C (96.1 F)
1951	36.7 C (98.1 F)
1952	37.8 C (100.0 F)
1953	40.6 C (105.1 F)
1954	43.9 C (111.0 F)
1955	39.4 C (102.9 F)
1956	37.8 C (100.0 F)
1957	37.2 C (99.0 F)
1958	35.0 C (95.0 F)
1959	35.6 C (96.1 F)
1960	37.2 C (99.0 F)
1961	35.0 C (95.0 F)
1962	37.2 C (99.0 F)
1963	36.7 C (98.1 F)
1964	38.3 C (100.9 F)
1965	35.0 C (95.0 F)
1966	38.9 C (102.0 F)
1967	37.2 C (99.0 F)
1968	36.7 C (98.1 F)
1969	37.8 C (100.0 F)
1970	41.1 C (106.0 F)
1971	37.8 C (100.0 F)
1972	39.4 C (102.9 F)
1973	38.9 C (102.0 F)
1974	42.8 C (109.0 F)
1975	38.9 C (102.0 F)
1976	38.9 C (102.0 F)
1977	35.6 C (96.1 F)
1978	36.7 C (98.1 F)
1979	38.3 C (100.9 F)
1980	44.4 C (111.9 F)

Coldest night (TNn)

The coldest night of the year at Chillicothe Radio Kchi, 1917 to 1980. The record is -33.9 C (-29.0 F) in 1930, marked on the chart; the median year is -24.4 C (-11.9 F).

Coldest night (TNn) at Chillicothe Radio Kchi by year
Year	Coldest night (TNn)
1917	-8.9 C (16.0 F)
1918	-28.9 C (-20.0 F)
1919	-27.8 C (-18.0 F)
1920	-17.8 C (0.0 F)
1921	-15.0 C (5.0 F)
1922	-17.8 C (0.0 F)
1923	-20.0 C (-4.0 F)
1924	-31.7 C (-25.1 F)
1925	-21.1 C (-6.0 F)
1926	-22.2 C (-8.0 F)
1927	-31.1 C (-24.0 F)
1928	-23.9 C (-11.0 F)
1929	-30.0 C (-22.0 F)
1930	-33.9 C (-29.0 F)
1931	-17.2 C (1.0 F)
1932	-28.9 C (-20.0 F)
1933	-27.2 C (-17.0 F)
1934	-30.6 C (-23.1 F)
1935	-21.7 C (-7.1 F)
1936	-29.4 C (-20.9 F)
1937	-18.9 C (-2.0 F)
1938	-19.4 C (-2.9 F)
1939	-20.0 C (-4.0 F)
1940	-26.7 C (-16.1 F)
1941	-15.6 C (3.9 F)
1942	-23.9 C (-11.0 F)
1943	-27.2 C (-17.0 F)
1944	-25.6 C (-14.1 F)
1945	-22.2 C (-8.0 F)
1946	-18.3 C (-0.9 F)
1947	-27.8 C (-18.0 F)
1948	-27.2 C (-17.0 F)
1949	-27.2 C (-17.0 F)
1950	-21.1 C (-6.0 F)
1951	-28.3 C (-18.9 F)
1952	-20.6 C (-5.1 F)
1953	-22.2 C (-8.0 F)
1954	-20.0 C (-4.0 F)
1955	-21.1 C (-6.0 F)
1956	-25.0 C (-13.0 F)
1957	-22.2 C (-8.0 F)
1958	-26.1 C (-15.0 F)
1959	-26.1 C (-15.0 F)
1960	-27.2 C (-17.0 F)
1961	-25.0 C (-13.0 F)
1962	-30.0 C (-22.0 F)
1963	-25.6 C (-14.1 F)
1964	-20.0 C (-4.0 F)
1965	-25.6 C (-14.1 F)
1966	-24.4 C (-11.9 F)
1967	-18.3 C (-0.9 F)
1968	-25.6 C (-14.1 F)
1969	-21.1 C (-6.0 F)
1970	-24.4 C (-11.9 F)
1971	-21.1 C (-6.0 F)
1972	-24.4 C (-11.9 F)
1973	-21.7 C (-7.1 F)
1974	-27.2 C (-17.0 F)
1975	-22.8 C (-9.0 F)
1976	-27.2 C (-17.0 F)
1977	-27.2 C (-17.0 F)
1978	-24.4 C (-11.9 F)
1979	-27.2 C (-17.0 F)
1980	-22.8 C (-9.0 F)

Wettest day (Rx1day)

The wettest day of the year at Chillicothe Radio Kchi, 1917 to 1980. The record is 181.9 mm (7.2 in) in 1958, marked on the chart; the median year is 68.6 mm (2.7 in).

Wettest day (Rx1day) at Chillicothe Radio Kchi by year
Year	Wettest day (Rx1day)
1917	68.6 mm (2.7 in)
1918	51.8 mm (2.0 in)
1919	44.5 mm (1.8 in)
1920	53.3 mm (2.1 in)
1921	76.2 mm (3.0 in)
1922	53.6 mm (2.1 in)
1923	93.2 mm (3.7 in)
1924	55.4 mm (2.2 in)
1925	56.4 mm (2.2 in)
1926	68.6 mm (2.7 in)
1927	156.2 mm (6.1 in)
1928	108.0 mm (4.3 in)
1929	52.1 mm (2.1 in)
1930	70.4 mm (2.8 in)
1931	59.9 mm (2.4 in)
1932	58.4 mm (2.3 in)
1933	82.3 mm (3.2 in)
1934	43.9 mm (1.7 in)
1935	94.0 mm (3.7 in)
1936	88.9 mm (3.5 in)
1937	58.7 mm (2.3 in)
1938	49.3 mm (1.9 in)
1939	143.8 mm (5.7 in)
1940	48.0 mm (1.9 in)
1941	46.5 mm (1.8 in)
1942	79.0 mm (3.1 in)
1943	69.1 mm (2.7 in)
1944	56.1 mm (2.2 in)
1945	67.6 mm (2.7 in)
1946	62.2 mm (2.4 in)
1947	99.8 mm (3.9 in)
1948	34.3 mm (1.4 in)
1949	72.6 mm (2.9 in)
1950	75.9 mm (3.0 in)
1951	60.2 mm (2.4 in)
1952	93.5 mm (3.7 in)
1953	37.6 mm (1.5 in)
1954	74.7 mm (2.9 in)
1955	68.6 mm (2.7 in)
1956	123.2 mm (4.9 in)
1957	109.5 mm (4.3 in)
1958	181.9 mm (7.2 in)
1959	61.5 mm (2.4 in)
1960	80.8 mm (3.2 in)
1961	122.7 mm (4.8 in)
1962	56.9 mm (2.2 in)
1963	42.4 mm (1.7 in)
1964	93.5 mm (3.7 in)
1965	89.7 mm (3.5 in)
1966	54.1 mm (2.1 in)
1967	96.3 mm (3.8 in)
1968	38.1 mm (1.5 in)
1969	105.9 mm (4.2 in)
1970	92.7 mm (3.6 in)
1971	68.6 mm (2.7 in)
1972	70.4 mm (2.8 in)
1973	52.1 mm (2.1 in)
1974	100.3 mm (3.9 in)
1975	63.8 mm (2.5 in)
1976	61.0 mm (2.4 in)
1977	120.9 mm (4.8 in)
1978	101.1 mm (4.0 in)
1979	48.8 mm (1.9 in)
1980	61.0 mm (2.4 in)

Wettest five days (Rx5day)

The wettest five days of the year at Chillicothe Radio Kchi, 1917 to 1980. The record is 243.3 mm (9.6 in) in 1927, marked on the chart; the median year is 104.8 mm (4.1 in).

Wettest five days (Rx5day) at Chillicothe Radio Kchi by year
Year	Wettest five days (Rx5day)
1917	51.8 mm (2.0 in)
1918	86.3 mm (3.4 in)
1919	83.9 mm (3.3 in)
1920	69.8 mm (2.7 in)
1921	114.6 mm (4.5 in)
1922	119.7 mm (4.7 in)
1923	126.7 mm (5.0 in)
1924	114.3 mm (4.5 in)
1925	109.7 mm (4.3 in)
1926	133.8 mm (5.3 in)
1927	243.3 mm (9.6 in)
1928	145.3 mm (5.7 in)
1929	105.4 mm (4.1 in)
1930	86.3 mm (3.4 in)
1931	186.2 mm (7.3 in)
1932	103.2 mm (4.1 in)
1933	92.2 mm (3.6 in)
1934	83.2 mm (3.3 in)
1935	145.8 mm (5.7 in)
1936	111.3 mm (4.4 in)
1937	142.1 mm (5.6 in)
1938	89.2 mm (3.5 in)
1939	207.0 mm (8.1 in)
1940	55.9 mm (2.2 in)
1941	94.3 mm (3.7 in)
1942	154.7 mm (6.1 in)
1943	88.1 mm (3.5 in)
1944	88.9 mm (3.5 in)
1945	88.5 mm (3.5 in)
1946	80.6 mm (3.2 in)
1947	142.8 mm (5.6 in)
1948	83.1 mm (3.3 in)
1949	91.5 mm (3.6 in)
1950	87.1 mm (3.4 in)
1951	49.1 mm (1.9 in)
1952	157.8 mm (6.2 in)
1953	45.7 mm (1.8 in)
1954	121.7 mm (4.8 in)
1955	109.9 mm (4.3 in)
1956	184.2 mm (7.3 in)
1957	125.2 mm (4.9 in)
1958	225.5 mm (8.9 in)
1959	83.6 mm (3.3 in)
1960	84.9 mm (3.3 in)
1961	128.3 mm (5.1 in)
1962	78.6 mm (3.1 in)
1963	68.8 mm (2.7 in)
1964	114.6 mm (4.5 in)
1965	138.7 mm (5.5 in)
1966	78.7 mm (3.1 in)
1967	117.9 mm (4.6 in)
1968	78.2 mm (3.1 in)
1969	157.2 mm (6.2 in)
1970	115.1 mm (4.5 in)
1971	73.7 mm (2.9 in)
1972	122.0 mm (4.8 in)
1973	90.3 mm (3.6 in)
1974	133.6 mm (5.3 in)
1975	104.2 mm (4.1 in)
1976	86.4 mm (3.4 in)
1977	162.9 mm (6.4 in)
1978	117.9 mm (4.6 in)
1979	84.2 mm (3.3 in)
1980	90.9 mm (3.6 in)

Longest dry spell (CDD)

The longest dry spell of the year at Chillicothe Radio Kchi, 1917 to 1980. The record is 46 days in 1967, marked on the chart; the median year is 25 days.

Longest dry spell (CDD) at Chillicothe Radio Kchi by year
Year	Longest dry spell (CDD)
1917	36 days
1918	32 days
1919	43 days
1920	31 days
1921	25 days
1922	25 days
1923	20 days
1924	21 days
1925	39 days
1926	31 days
1927	22 days
1928	35 days
1929	16 days
1930	24 days
1931	18 days
1932	17 days
1933	26 days
1934	28 days
1935	21 days
1936	27 days
1937	20 days
1938	24 days
1939	36 days
1940	26 days
1941	18 days
1942	16 days
1943	28 days
1944	26 days
1945	22 days
1946	21 days
1947	29 days
1948	29 days
1949	27 days
1950	30 days
1951	13 days
1952	25 days
1953	23 days
1954	26 days
1955	20 days
1956	44 days
1957	31 days
1958	29 days
1959	35 days
1960	20 days
1961	18 days
1962	15 days
1963	30 days
1964	18 days
1965	21 days
1966	20 days
1967	46 days
1968	23 days
1969	18 days
1970	27 days
1971	30 days
1972	18 days
1973	21 days
1974	32 days
1975	20 days
1976	40 days
1977	26 days
1978	22 days
1979	31 days
1980	24 days

Each chart shows one value per year; the dot marks the record year. TXx is the hottest daily maximum, TNn the coldest daily minimum, Rx1day and Rx5day the largest one-day and five-day rain totals, and CDD the longest run of days with less than 1 mm of rain. A year with missing days can understate an extreme.

Frost Dates and Growing Season

56 years with a frost

Across 56 years with a frost, the median last spring frost at Chillicothe Radio Kchi falls on 18 April and the median first autumn frost on 15 October, which leaves a median of 181 days between them.

Fitted over all years, the growing season changes by +2.7 days per decade at this station.

Frost dates and growing season at Chillicothe Radio Kchi
Measure	Median, all years	Earliest period	Recent period (1948 to 1979)	Recent against earliest	Fitted trend
Last spring frost	18 April	n/a	15 April	n/a	-1.3 days per decade
First autumn frost	15 October	n/a	16 October	n/a	+1.3 days per decade
Growing days	181 days	n/a	183 days	n/a	+2.7 days per decade

A frost day is a day with a daily minimum at or below 0 C (32 F). The last spring frost and the first autumn frost are the last and first such days of the cold season, and growing days are the days between them. A negative trend for the last spring frost means it comes earlier.

Rainfall Return Levels

58 years, 1918 to 1979

A day with at least 70.5 mm (2.8 in) of rain is expected about once in 2 years. A day with at least 184.3 mm (7.3 in) of rain is expected about once in 100 years.

Rainfall return levels at Chillicothe Radio Kchi: the daily rain expected about once in a given number of years
Expected about once in	A day with at least	Note
2 years	70.5 mm (2.8 in)
5 years	97.2 mm (3.8 in)
10 years	116.3 mm (4.6 in)
25 years	142.2 mm (5.6 in)
50 years	162.7 mm (6.4 in)
100 years	184.3 mm (7.3 in)	Longer than the 58 years of record

The levels come from a generalised extreme value (GEV) distribution fitted by L-moments to the wettest-day total of each year, 58 years of values from 1918 to 1979.

A return level is an estimate. It is least reliable for the long periods, 50 and 100 years, and for any period longer than the record behind the fit, where the fit has to reach past the largest day actually observed. It is not a forecast.

The largest wettest-day totals in the fit: 181.9 mm (7.2 in) in 1958; 156.2 mm (6.1 in) in 1927; 143.8 mm (5.7 in) in 1939.

Station Changes

1 suspected

One change was suspected in the annual mean temperature of Chillicothe Radio Kchi, at 1967. Each is measured against neighbouring stations.

Relative to 5 neighbouring stations, the station's annual mean temperature from 1967 ran 0.3 C (0.6 F) higher than in the years before (likely change).

Suspected changes in the annual mean temperature at Chillicothe Radio Kchi, against neighbouring stations
Year	Shift (C)	Shift (F)	Strength	Neighbours
1967	+0.3	+0.6	likely	5

Possible change at the station (a move, a new instrument or a new site); the record is kept as measured. A "likely" change has a larger test statistic than a "possible" one. Neither says why the station differs from its neighbours. How changes are found, and the largest ones.

Download the Data

Data for Chillicothe Radio Kchi standing records by year: CSV or JSON. Field meanings are on the data page.
Data for Chillicothe Radio Kchi 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). Records are computed by this site and are not official.

Data as of 2025-12-31. Last revised 31 December 2025 (2025-12-31).