Ionia Weather Records (USC00143997)

Record envelope, standing records and threshold days for Ionia (USC00143997), Kansas, United States, with 133 years of record.

Key Facts for Ionia

Ionia (USC00143997) is a weather station in Kansas, United States at 39.66 latitude and -98.35 longitude, 469 m (1,537 ft) above sea level.
The station reports from 1894 to 2026, 133 years of record.
1,460 records set at Ionia still stand.
Records are tracked for prcp, snow, snwd: an element needs 30 years of data to be eligible.
Ionia set a daily record precipitation of 23.4 mm (0.9 in) on 25 April 2025.

About the Station

Location: Kansas, United States, 39.66 latitude, -98.35 longitude.
Elevation: 469 m (1,537 ft).
Period of record: 1894 to 2026, 133 years.
Eligible elements: 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 Ionia. 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 Ionia, with 2026 drawn through them
Month	Highest record high	Lowest record low	2026 highest maximum	2026 lowest minimum
Jan	20.6 C (69.1 F)	-30.0 C (-22.0 F)	n/a	n/a
Feb	23.9 C (75.0 F)	-27.2 C (-17.0 F)	n/a	n/a
Mar	34.4 C (93.9 F)	-17.8 C (0.0 F)	n/a	n/a
Apr	32.8 C (91.0 F)	-9.4 C (15.1 F)	n/a	n/a
May	38.3 C (100.9 F)	-0.6 C (30.9 F)	n/a	n/a
Jun	38.3 C (100.9 F)	5.0 C (41.0 F)	n/a	n/a
Jul	41.7 C (107.1 F)	9.4 C (48.9 F)	n/a	n/a
Aug	38.9 C (102.0 F)	11.1 C (52.0 F)	n/a	n/a
Sep	37.8 C (100.0 F)	-1.7 C (28.9 F)	n/a	n/a
Oct	31.7 C (89.1 F)	-9.4 C (15.1 F)	n/a	n/a
Nov	26.7 C (80.1 F)	-18.9 C (-2.0 F)	n/a	n/a
Dec	20.6 C (69.1 F)	-22.8 C (-9.0 F)	n/a	n/a

Which Years Hold Standing Records

1,460 standing records

1,460 records at Ionia still stand. 1894 holds the most, with 805.

Wettest Day of Each Month

Aug: 120.7 mm (4.8 in)

The wettest day on record for each calendar month at Ionia. The most was 120.7 mm (4.8 in) on 19 August 1961.

Record daily precipitation for each month at Ionia
Month	Record daily precipitation (mm)	Date
Jan	35.6 mm (1.4 in)	16 January 2017
Feb	52.1 mm (2.1 in)	26 February 1895
Mar	75.7 mm (3.0 in)	23 March 1987
Apr	94.0 mm (3.7 in)	14 April 1987
May	91.7 mm (3.6 in)	25 May 2011
Jun	116.6 mm (4.6 in)	2 June 2011
Jul	92.5 mm (3.6 in)	27 July 2020
Aug	120.7 mm (4.8 in)	19 August 1961
Sep	116.1 mm (4.6 in)	12 September 1961
Oct	87.1 mm (3.4 in)	11 October 1986
Nov	73.2 mm (2.9 in)	20 November 1973
Dec	45.0 mm (1.8 in)	14 December 2015

Period of Record Coverage

1894 to 1895

2 years of record at Ionia, 1894 to 1895. Every year has data for at least 90 percent of its days.

Latest Records

Latest records at Ionia
Date	Station	Record	Value	Beat old record by	Old record stood	Significance
25 April 2025	Ionia, US	daily rain	23.4 mm (0.9 in)	7.4 mm (0.29 in)	16 years	20 of 100 (Routine)
20 March 2025	Ionia, US	daily snowfall	6.4 cm (2.5 in)	1.3 cm (0.5 in)	19 years	18 of 100 (Routine)
19 February 2025	Ionia, US	daily snowfall	1.3 cm (0.5 in)	1.3 cm (0.5 in)	130 years	20 of 100 (Routine)
18 February 2025	Ionia, US	daily snowfall (Tie)	5.1 cm (2.0 in)	tie	41 years	5 of 100 (Routine)
6 January 2025	Ionia, US	daily rain	7.6 mm (0.30 in)	2.3 mm (0.09 in)	30 years	20 of 100 (Routine)
6 January 2025	Ionia, US	daily snowfall	7.6 cm (3.0 in)	1.2 cm (0.5 in)	20 years	18 of 100 (Routine)
5 January 2025	Ionia, US	daily snowfall	10.2 cm (4.0 in)	5.1 cm (2.0 in)	29 years	29 of 100 (Routine)
19 November 2024	Ionia, US	daily rain	21.1 mm (0.8 in)	5.1 mm (0.20 in)	32 years	20 of 100 (Routine)
9 November 2024	Ionia, US	daily rain	35.1 mm (1.4 in)	21.9 mm (0.9 in)	41 years	44 of 100 (Notable)
17 September 2024	Ionia, US	daily rain	19.6 mm (0.8 in)	7.9 mm (0.31 in)	54 years	20 of 100 (Routine)
2 May 2024	Ionia, US	daily rain	17.3 mm (0.7 in)	5.6 mm (0.22 in)	25 years	20 of 100 (Routine)
26 April 2024	Ionia, US	daily rain	37.3 mm (1.5 in)	22.8 mm (0.9 in)	52 years	48 of 100 (Notable)
26 March 2024	Ionia, US	daily snowfall	1.3 cm (0.5 in)	1.3 cm (0.5 in)	129 years	20 of 100 (Routine)
3 February 2024	Ionia, US	daily rain	21.1 mm (0.8 in)	8.1 mm (0.32 in)	12 years	20 of 100 (Routine)
15 December 2023	Ionia, US	daily rain	23.6 mm (0.9 in)	2.3 mm (0.09 in)	38 years	20 of 100 (Routine)
10 May 2023	Ionia, US	daily rain	42.4 mm (1.7 in)	19.5 mm (0.8 in)	65 years	45 of 100 (Notable)
22 January 2023	Ionia, US	daily snowfall	9.7 cm (3.8 in)	4.6 cm (1.8 in)	3 years	19 of 100 (Routine)
15 November 2022	Ionia, US	daily snowfall	1.0 cm (0.4 in)	1.0 cm (0.4 in)	126 years	20 of 100 (Routine)
28 July 2022	Ionia, US	daily rain	54.6 mm (2.1 in)	16.2 mm (0.6 in)	25 years	27 of 100 (Routine)
25 July 2022	Ionia, US	daily rain	54.4 mm (2.1 in)	32.0 mm (1.3 in)	48 years	44 of 100 (Notable)

Extremes by Year

1894 to 2026

Yearly extremes at Ionia: the record and the median year
Measure	Record	Year of the record	Median year	Years with a value
Hottest day (TXx)	41.7 C (107.1 F)	1894	40.0 C (104.0 F)	2
Coldest night (TNn)	-30.0 C (-22.0 F)	1894	-28.6 C (-19.5 F)	2
Wettest day (Rx1day)	120.7 mm (4.8 in)	1961	57.8 mm (2.3 in)	78
Wettest five days (Rx5day)	198.7 mm (7.8 in)	1961	88.3 mm (3.5 in)	77
Longest dry spell (CDD)	71 days	2006	34 days	78

Hottest day (TXx)

The hottest day of the year at Ionia, 1894 to 2026. The record is 41.7 C (107.1 F) in 1894, marked on the chart; the median year is 40.0 C (104.0 F).

Hottest day (TXx) at Ionia by year
Year	Hottest day (TXx)
1894	41.7 C (107.1 F)
1895	38.3 C (100.9 F)
1948	n/a
1949	n/a
1950	n/a
1951	n/a
1955	n/a
1956	n/a
1957	n/a
1958	n/a
1959	n/a
1960	n/a
1961	n/a
1962	n/a
1963	n/a
1964	n/a
1965	n/a
1966	n/a
1967	n/a
1968	n/a
1969	n/a
1970	n/a
1971	n/a
1972	n/a
1973	n/a
1974	n/a
1975	n/a
1976	n/a
1977	n/a
1978	n/a
1979	n/a
1980	n/a
1981	n/a
1982	n/a
1983	n/a
1984	n/a
1985	n/a
1986	n/a
1987	n/a
1988	n/a
1989	n/a
1990	n/a
1991	n/a
1992	n/a
1993	n/a
1994	n/a
1995	n/a
1996	n/a
1997	n/a
1998	n/a
1999	n/a
2000	n/a
2001	n/a
2002	n/a
2003	n/a
2004	n/a
2005	n/a
2006	n/a
2007	n/a
2008	n/a
2009	n/a
2010	n/a
2011	n/a
2012	n/a
2013	n/a
2014	n/a
2015	n/a
2016	n/a
2017	n/a
2018	n/a
2019	n/a
2020	n/a
2021	n/a
2022	n/a
2023	n/a
2024	n/a
2025	n/a
2026	n/a

Coldest night (TNn)

The coldest night of the year at Ionia, 1894 to 2026. The record is -30.0 C (-22.0 F) in 1894, marked on the chart; the median year is -28.6 C (-19.5 F).

Coldest night (TNn) at Ionia by year
Year	Coldest night (TNn)
1894	-30.0 C (-22.0 F)
1895	-27.2 C (-17.0 F)
1948	n/a
1949	n/a
1950	n/a
1951	n/a
1955	n/a
1956	n/a
1957	n/a
1958	n/a
1959	n/a
1960	n/a
1961	n/a
1962	n/a
1963	n/a
1964	n/a
1965	n/a
1966	n/a
1967	n/a
1968	n/a
1969	n/a
1970	n/a
1971	n/a
1972	n/a
1973	n/a
1974	n/a
1975	n/a
1976	n/a
1977	n/a
1978	n/a
1979	n/a
1980	n/a
1981	n/a
1982	n/a
1983	n/a
1984	n/a
1985	n/a
1986	n/a
1987	n/a
1988	n/a
1989	n/a
1990	n/a
1991	n/a
1992	n/a
1993	n/a
1994	n/a
1995	n/a
1996	n/a
1997	n/a
1998	n/a
1999	n/a
2000	n/a
2001	n/a
2002	n/a
2003	n/a
2004	n/a
2005	n/a
2006	n/a
2007	n/a
2008	n/a
2009	n/a
2010	n/a
2011	n/a
2012	n/a
2013	n/a
2014	n/a
2015	n/a
2016	n/a
2017	n/a
2018	n/a
2019	n/a
2020	n/a
2021	n/a
2022	n/a
2023	n/a
2024	n/a
2025	n/a
2026	n/a

Wettest day (Rx1day)

The wettest day of the year at Ionia, 1894 to 2026. The record is 120.7 mm (4.8 in) in 1961, marked on the chart; the median year is 57.8 mm (2.3 in).

Wettest day (Rx1day) at Ionia by year
Year	Wettest day (Rx1day)
1894	49.3 mm (1.9 in)
1895	70.9 mm (2.8 in)
1948	33.0 mm (1.3 in)
1949	62.5 mm (2.5 in)
1950	72.4 mm (2.9 in)
1951	75.7 mm (3.0 in)
1955	23.1 mm (0.9 in)
1956	29.2 mm (1.1 in)
1957	67.3 mm (2.6 in)
1958	72.9 mm (2.9 in)
1959	59.7 mm (2.4 in)
1960	50.0 mm (2.0 in)
1961	120.7 mm (4.8 in)
1962	55.1 mm (2.2 in)
1963	58.4 mm (2.3 in)
1964	40.6 mm (1.6 in)
1965	53.3 mm (2.1 in)
1966	76.2 mm (3.0 in)
1967	52.6 mm (2.1 in)
1968	73.2 mm (2.9 in)
1969	39.1 mm (1.5 in)
1970	40.6 mm (1.6 in)
1971	56.4 mm (2.2 in)
1972	71.1 mm (2.8 in)
1973	89.7 mm (3.5 in)
1974	21.3 mm (0.8 in)
1975	45.0 mm (1.8 in)
1976	40.6 mm (1.6 in)
1977	81.3 mm (3.2 in)
1978	50.8 mm (2.0 in)
1979	60.7 mm (2.4 in)
1980	41.4 mm (1.6 in)
1981	67.1 mm (2.6 in)
1982	47.0 mm (1.9 in)
1983	51.1 mm (2.0 in)
1984	36.8 mm (1.4 in)
1985	53.3 mm (2.1 in)
1986	87.1 mm (3.4 in)
1987	94.0 mm (3.7 in)
1988	48.8 mm (1.9 in)
1989	88.6 mm (3.5 in)
1990	63.2 mm (2.5 in)
1991	31.0 mm (1.2 in)
1992	61.0 mm (2.4 in)
1993	81.8 mm (3.2 in)
1994	42.7 mm (1.7 in)
1995	49.3 mm (1.9 in)
1996	71.1 mm (2.8 in)
1997	43.4 mm (1.7 in)
1998	66.0 mm (2.6 in)
1999	33.3 mm (1.3 in)
2000	23.9 mm (0.9 in)
2001	64.3 mm (2.5 in)
2002	59.4 mm (2.3 in)
2003	90.7 mm (3.6 in)
2004	47.8 mm (1.9 in)
2005	75.7 mm (3.0 in)
2006	50.5 mm (2.0 in)
2007	48.8 mm (1.9 in)
2008	62.7 mm (2.5 in)
2009	43.4 mm (1.7 in)
2010	69.9 mm (2.8 in)
2011	116.6 mm (4.6 in)
2012	71.9 mm (2.8 in)
2013	58.4 mm (2.3 in)
2014	110.7 mm (4.4 in)
2015	81.3 mm (3.2 in)
2016	57.7 mm (2.3 in)
2017	43.4 mm (1.7 in)
2018	66.5 mm (2.6 in)
2019	57.9 mm (2.3 in)
2020	92.5 mm (3.6 in)
2021	69.1 mm (2.7 in)
2022	54.6 mm (2.1 in)
2023	42.4 mm (1.7 in)
2024	37.3 mm (1.5 in)
2025	23.4 mm (0.9 in)
2026	0.0 mm (0.00 in)

Wettest five days (Rx5day)

The wettest five days of the year at Ionia, 1894 to 2026. The record is 198.7 mm (7.8 in) in 1961, marked on the chart; the median year is 88.3 mm (3.5 in).

Wettest five days (Rx5day) at Ionia by year
Year	Wettest five days (Rx5day)
1894	78.0 mm (3.1 in)
1895	95.3 mm (3.8 in)
1948	38.3 mm (1.5 in)
1949	84.2 mm (3.3 in)
1950	125.5 mm (4.9 in)
1951	145.6 mm (5.7 in)
1955	59.5 mm (2.3 in)
1956	68.9 mm (2.7 in)
1957	99.6 mm (3.9 in)
1958	79.0 mm (3.1 in)
1959	93.3 mm (3.7 in)
1960	57.4 mm (2.3 in)
1961	198.7 mm (7.8 in)
1962	102.0 mm (4.0 in)
1963	95.5 mm (3.8 in)
1964	78.2 mm (3.1 in)
1965	63.0 mm (2.5 in)
1966	76.2 mm (3.0 in)
1967	89.0 mm (3.5 in)
1968	92.8 mm (3.7 in)
1969	70.3 mm (2.8 in)
1970	54.1 mm (2.1 in)
1971	79.3 mm (3.1 in)
1972	105.6 mm (4.2 in)
1973	135.2 mm (5.3 in)
1974	40.3 mm (1.6 in)
1975	94.5 mm (3.7 in)
1976	48.2 mm (1.9 in)
1977	93.8 mm (3.7 in)
1978	77.2 mm (3.0 in)
1979	91.9 mm (3.6 in)
1980	80.2 mm (3.2 in)
1981	120.0 mm (4.7 in)
1982	79.2 mm (3.1 in)
1983	76.5 mm (3.0 in)
1984	69.6 mm (2.7 in)
1985	86.8 mm (3.4 in)
1986	97.0 mm (3.8 in)
1987	102.9 mm (4.1 in)
1988	65.6 mm (2.6 in)
1989	124.7 mm (4.9 in)
1990	89.1 mm (3.5 in)
1991	54.8 mm (2.2 in)
1992	92.2 mm (3.6 in)
1993	180.6 mm (7.1 in)
1994	59.9 mm (2.4 in)
1995	76.2 mm (3.0 in)
1996	122.9 mm (4.8 in)
1997	69.1 mm (2.7 in)
1998	88.3 mm (3.5 in)
1999	54.6 mm (2.1 in)
2000	34.5 mm (1.4 in)
2001	140.9 mm (5.5 in)
2002	136.6 mm (5.4 in)
2003	100.6 mm (4.0 in)
2004	103.2 mm (4.1 in)
2005	75.7 mm (3.0 in)
2006	60.4 mm (2.4 in)
2007	66.1 mm (2.6 in)
2008	82.3 mm (3.2 in)
2009	60.2 mm (2.4 in)
2010	108.5 mm (4.3 in)
2011	131.6 mm (5.2 in)
2012	73.4 mm (2.9 in)
2013	66.5 mm (2.6 in)
2014	118.4 mm (4.7 in)
2015	122.2 mm (4.8 in)
2016	94.5 mm (3.7 in)
2017	94.0 mm (3.7 in)
2018	124.3 mm (4.9 in)
2019	95.2 mm (3.7 in)
2020	113.6 mm (4.5 in)
2021	94.5 mm (3.7 in)
2022	115.6 mm (4.6 in)
2023	66.1 mm (2.6 in)
2024	56.9 mm (2.2 in)
2025	53.3 mm (2.1 in)
2026	n/a

Longest dry spell (CDD)

The longest dry spell of the year at Ionia, 1894 to 2026. The record is 71 days in 2006, marked on the chart; the median year is 34 days.

Longest dry spell (CDD) at Ionia by year
Year	Longest dry spell (CDD)
1894	63 days
1895	28 days
1948	28 days
1949	50 days
1950	42 days
1951	19 days
1955	20 days
1956	38 days
1957	26 days
1958	41 days
1959	44 days
1960	27 days
1961	25 days
1962	30 days
1963	44 days
1964	43 days
1965	37 days
1966	32 days
1967	59 days
1968	37 days
1969	24 days
1970	50 days
1971	31 days
1972	47 days
1973	23 days
1974	58 days
1975	31 days
1976	38 days
1977	38 days
1978	31 days
1979	38 days
1980	39 days
1981	30 days
1982	32 days
1983	22 days
1984	49 days
1985	25 days
1986	33 days
1987	22 days
1988	35 days
1989	48 days
1990	28 days
1991	49 days
1992	29 days
1993	27 days
1994	30 days
1995	37 days
1996	47 days
1997	34 days
1998	27 days
1999	55 days
2000	28 days
2001	37 days
2002	62 days
2003	22 days
2004	25 days
2005	36 days
2006	71 days
2007	35 days
2008	37 days
2009	49 days
2010	43 days
2011	18 days
2012	50 days
2013	31 days
2014	28 days
2015	27 days
2016	49 days
2017	37 days
2018	25 days
2019	28 days
2020	45 days
2021	34 days
2022	48 days
2023	23 days
2024	31 days
2025	28 days
2026	1 day

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.

Rainfall Return Levels

73 years, 1894 to 2024

A day with at least 57.8 mm (2.3 in) of rain is expected about once in 2 years. A day with at least 120.0 mm (4.7 in) of rain is expected about once in 100 years.

Rainfall return levels at Ionia: the daily rain expected about once in a given number of years
Expected about once in	A day with at least	Note
2 years	57.8 mm (2.3 in)
5 years	76.2 mm (3.0 in)
10 years	87.6 mm (3.4 in)
25 years	101.3 mm (4.0 in)
50 years	110.9 mm (4.4 in)
100 years	120.0 mm (4.7 in)	Longer than the 73 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, 73 years of values from 1894 to 2024.

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: 120.7 mm (4.8 in) in 1961; 116.6 mm (4.6 in) in 2011; 110.7 mm (4.4 in) in 2014.

Download the Data

Data for Ionia standing records by year: CSV or JSON. Field meanings are on the data page.
Data for Ionia 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 2026-10-14 (14 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).

Year	Days with data	Share of year	Complete
1894	361	99%	Yes
1895	338	93%	Yes