Ione Weather Records (USC00044283)

Record envelope, standing records and threshold days for Ione (USC00044283), California, United States, with 72 years of record.

Key Facts for Ione

Ione (USC00044283) is a weather station in California, United States at 38.35 latitude and -120.93 longitude, 85 m (279 ft) above sea level.
The station reports from 1906 to 1977, 72 years of record.
1,464 records set at Ione still stand.
Records are tracked for no element yet: an element needs 30 years of data to be eligible.

About the Station

Location: California, United States, 38.35 latitude, -120.93 longitude.
Elevation: 85 m (279 ft).
Period of record: 1906 to 1977, 72 years.
Eligible elements: none yet.

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 Ione. 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 Ione, with 2026 drawn through them
Month	Highest record high	Lowest record low	2026 highest maximum	2026 lowest minimum
Jan	16.7 C (62.1 F)	-7.2 C (19.0 F)	n/a	n/a
Feb	22.2 C (72.0 F)	-4.4 C (24.1 F)	n/a	n/a
Mar	24.4 C (75.9 F)	-2.2 C (28.0 F)	n/a	n/a
Apr	25.6 C (78.1 F)	-1.1 C (30.0 F)	n/a	n/a
May	30.0 C (86.0 F)	4.4 C (39.9 F)	n/a	n/a
Jun	40.0 C (104.0 F)	12.2 C (54.0 F)	n/a	n/a
Jul	41.1 C (106.0 F)	13.3 C (55.9 F)	n/a	n/a
Aug	40.6 C (105.1 F)	11.1 C (52.0 F)	n/a	n/a
Sep	36.7 C (98.1 F)	5.0 C (41.0 F)	n/a	n/a
Oct	33.3 C (91.9 F)	1.1 C (34.0 F)	n/a	n/a
Nov	23.3 C (73.9 F)	-3.3 C (26.1 F)	n/a	n/a
Dec	20.0 C (68.0 F)	-4.4 C (24.1 F)	n/a	n/a

Which Years Hold Standing Records

1,464 standing records

1,464 records at Ione still stand. 1915 holds the most, with 482.

Wettest Day of Each Month

Dec: 111.0 mm (4.4 in)

The wettest day on record for each calendar month at Ione. The most was 111.0 mm (4.4 in) on 11 December 1906.

Record daily precipitation for each month at Ione
Month	Record daily precipitation (mm)	Date
Jan	64.0 mm (2.5 in)	22 January 1967
Feb	73.2 mm (2.9 in)	1 February 1963
Mar	61.0 mm (2.4 in)	15 March 1906
Apr	30.7 mm (1.2 in)	27 April 1960
May	25.9 mm (1.0 in)	14 May 1968
Jun	18.8 mm (0.7 in)	9 June 1964
Jul	29.0 mm (1.1 in)	9 July 1974
Aug	16.5 mm (0.6 in)	12 August 1965
Sep	46.7 mm (1.8 in)	7 September 1912
Oct	46.5 mm (1.8 in)	14 October 1962
Nov	50.3 mm (2.0 in)	20 November 1963
Dec	111.0 mm (4.4 in)	11 December 1906

Period of Record Coverage

1915 to 1918

4 years of record at Ione, 1915 to 1918. 1 years have data for under 90 percent of days and are left out of rankings: 1918.

Latest Records

No records were set at this station in the latest data.

Extremes by Year

1906 to 1977

Yearly extremes at Ione: the record and the median year
Measure	Record	Year of the record	Median year	Years with a value
Hottest day (TXx)	41.1 C (106.0 F)	1917	39.8 C (103.6 F)	4
Coldest night (TNn)	-7.2 C (19.0 F)	1917	-3.8 C (25.1 F)	4
Wettest day (Rx1day)	111.0 mm (4.4 in)	1906	41.0 mm (1.6 in)	32
Wettest five days (Rx5day)	212.9 mm (8.4 in)	1906	74.9 mm (2.9 in)	31
Longest dry spell (CDD)	178 days	1911	95 days	31

Hottest day (TXx)

The hottest day of the year at Ione, 1906 to 1977. The record is 41.1 C (106.0 F) in 1917, marked on the chart; the median year is 39.8 C (103.6 F).

Hottest day (TXx) at Ione by year
Year	Hottest day (TXx)
1906	n/a
1907	n/a
1908	n/a
1909	n/a
1910	n/a
1911	n/a
1912	n/a
1913	n/a
1914	n/a
1915	40.6 C (105.1 F)
1916	38.9 C (102.0 F)
1917	41.1 C (106.0 F)
1918	23.3 C (73.9 F)
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

Coldest night (TNn)

The coldest night of the year at Ione, 1906 to 1977. The record is -7.2 C (19.0 F) in 1917, marked on the chart; the median year is -3.8 C (25.1 F).

Coldest night (TNn) at Ione by year
Year	Coldest night (TNn)
1906	n/a
1907	n/a
1908	n/a
1909	n/a
1910	n/a
1911	n/a
1912	n/a
1913	n/a
1914	n/a
1915	-4.4 C (24.1 F)
1916	-3.3 C (26.1 F)
1917	-7.2 C (19.0 F)
1918	-3.3 C (26.1 F)
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

Wettest day (Rx1day)

The wettest day of the year at Ione, 1906 to 1977. The record is 111.0 mm (4.4 in) in 1906, marked on the chart; the median year is 41.0 mm (1.6 in).

Wettest day (Rx1day) at Ione by year
Year	Wettest day (Rx1day)
1906	111.0 mm (4.4 in)
1907	61.0 mm (2.4 in)
1908	33.0 mm (1.3 in)
1909	36.8 mm (1.4 in)
1910	50.8 mm (2.0 in)
1911	55.1 mm (2.2 in)
1912	46.7 mm (1.8 in)
1913	30.5 mm (1.2 in)
1914	57.4 mm (2.3 in)
1915	45.7 mm (1.8 in)
1916	48.3 mm (1.9 in)
1917	33.0 mm (1.3 in)
1918	40.6 mm (1.6 in)
1959	39.1 mm (1.5 in)
1960	35.1 mm (1.4 in)
1961	28.2 mm (1.1 in)
1962	46.5 mm (1.8 in)
1963	73.2 mm (2.9 in)
1964	39.6 mm (1.6 in)
1965	41.4 mm (1.6 in)
1966	45.5 mm (1.8 in)
1967	64.0 mm (2.5 in)
1968	44.7 mm (1.8 in)
1969	49.3 mm (1.9 in)
1970	34.3 mm (1.4 in)
1971	40.6 mm (1.6 in)
1972	40.6 mm (1.6 in)
1973	41.7 mm (1.6 in)
1974	31.2 mm (1.2 in)
1975	37.8 mm (1.5 in)
1976	19.8 mm (0.8 in)
1977	23.4 mm (0.9 in)

Wettest five days (Rx5day)

The wettest five days of the year at Ione, 1906 to 1977. The record is 212.9 mm (8.4 in) in 1906, marked on the chart; the median year is 74.9 mm (2.9 in).

Wettest five days (Rx5day) at Ione by year
Year	Wettest five days (Rx5day)
1906	212.9 mm (8.4 in)
1907	101.9 mm (4.0 in)
1908	45.7 mm (1.8 in)
1909	115.2 mm (4.5 in)
1910	98.6 mm (3.9 in)
1911	163.9 mm (6.5 in)
1912	59.4 mm (2.3 in)
1913	74.9 mm (2.9 in)
1914	101.4 mm (4.0 in)
1915	72.0 mm (2.8 in)
1916	72.4 mm (2.9 in)
1917	82.5 mm (3.2 in)
1918	n/a
1959	61.0 mm (2.4 in)
1960	53.0 mm (2.1 in)
1961	54.9 mm (2.2 in)
1962	118.1 mm (4.6 in)
1963	117.4 mm (4.6 in)
1964	67.1 mm (2.6 in)
1965	83.0 mm (3.3 in)
1966	82.1 mm (3.2 in)
1967	126.2 mm (5.0 in)
1968	54.9 mm (2.2 in)
1969	84.1 mm (3.3 in)
1970	89.3 mm (3.5 in)
1971	53.3 mm (2.1 in)
1972	73.3 mm (2.9 in)
1973	123.5 mm (4.9 in)
1974	57.4 mm (2.3 in)
1975	44.2 mm (1.7 in)
1976	43.1 mm (1.7 in)
1977	28.5 mm (1.1 in)

Longest dry spell (CDD)

The longest dry spell of the year at Ione, 1906 to 1977. The record is 178 days in 1911, marked on the chart; the median year is 95 days.

Longest dry spell (CDD) at Ione by year
Year	Longest dry spell (CDD)
1906	90 days
1907	133 days
1908	112 days
1909	105 days
1910	77 days
1911	178 days
1912	81 days
1913	126 days
1914	46 days
1915	31 days
1916	28 days
1917	24 days
1918	n/a
1959	94 days
1960	134 days
1961	142 days
1962	90 days
1963	93 days
1964	82 days
1965	112 days
1966	81 days
1967	118 days
1968	97 days
1969	173 days
1970	87 days
1971	95 days
1972	127 days
1973	140 days
1974	84 days
1975	113 days
1976	98 days
1977	34 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.

Download the Data

Data for Ione standing records by year: CSV or JSON. Field meanings are on the data page.
Data for Ione 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
1915	363	99%	Yes
1916	359	98%	Yes
1917	360	99%	Yes
1918	150	41%	No