Mio Hydro Plt Weather Records (USC00205531)

Record envelope, standing records and threshold days for Mio Hydro Plt (USC00205531), Michigan, United States, with 115 years of record.

Key Facts for Mio Hydro Plt

Mio Hydro Plt (USC00205531) is a weather station in Michigan, United States at 44.66 latitude and -84.13 longitude, 293 m (960 ft) above sea level.
The station reports from 1892 to 2006, 115 years of record.
1,464 records set at Mio Hydro Plt still stand.
Records are tracked for tmax, tmin, prcp, snow, snwd: an element needs 30 years of data to be eligible.
Mio Hydro Plt set a daily record high maximum temperature of 10.6 C (51.1 F) on 18 December 2006.

About the Station

Location: Michigan, United States, 44.66 latitude, -84.13 longitude.
Elevation: 293 m (960 ft).
Period of record: 1892 to 2006, 115 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 Mio Hydro Plt. 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 Mio Hydro Plt, with 2026 drawn through them
Month	Highest record high	Lowest record low	2026 highest maximum	2026 lowest minimum
Jan	16.1 C (61.0 F)	-38.9 C (-38.0 F)	n/a	n/a
Feb	17.2 C (63.0 F)	-43.9 C (-47.0 F)	n/a	n/a
Mar	25.6 C (78.1 F)	-39.4 C (-38.9 F)	n/a	n/a
Apr	32.2 C (90.0 F)	-30.6 C (-23.1 F)	n/a	n/a
May	35.6 C (96.1 F)	-8.3 C (17.1 F)	n/a	n/a
Jun	39.4 C (102.9 F)	-3.3 C (26.1 F)	n/a	n/a
Jul	44.4 C (111.9 F)	-1.7 C (28.9 F)	n/a	n/a
Aug	37.8 C (100.0 F)	-4.4 C (24.1 F)	n/a	n/a
Sep	35.6 C (96.1 F)	-7.2 C (19.0 F)	n/a	n/a
Oct	30.6 C (87.1 F)	-15.0 C (5.0 F)	n/a	n/a
Nov	23.9 C (75.0 F)	-23.9 C (-11.0 F)	n/a	n/a
Dec	18.9 C (66.0 F)	-36.1 C (-33.0 F)	n/a	n/a

Which Years Hold Standing Records

1,464 standing records

1,464 records at Mio Hydro Plt still stand. 1918 holds the most, with 39.

Standing records at Mio Hydro Plt by the year they were set
Year set	Standing records
1893	7
1894	2
1896	33
1897	18
1898	16
1899	35
1900	8
1901	13
1902	12
1903	20
1904	12
1906	16
1917	14
1918	39
1919	17
1920	24
1921	32
1922	6
1923	25
1924	12
1925	24
1926	22
1927	24
1928	14
1929	26
1930	31
1931	28
1932	11
1933	21
1934	31
1935	6
1936	39
1937	7
1938	13
1939	16
1940	9
1941	20
1942	14
1943	16
1944	23
1945	26
1946	20
1947	27
1948	17
1949	18
1950	25
1951	14
1952	7
1953	11
1954	11
1955	10
1956	12
1957	7
1958	8
1959	8
1960	1
1961	4
1962	5
1963	13
1964	18
1965	12
1966	12
1967	7
1968	10
1969	10
1970	7
1971	10
1972	10
1973	15
1974	14
1975	8
1976	13
1977	11
1978	3
1979	14
1980	9
1981	13
1982	10
1983	12
1984	11
1985	8
1986	11
1987	12
1988	10
1989	14
1990	17
1991	18
1992	5
1993	5
1994	8
1995	9
1996	9
1997	9
1998	15
1999	13
2000	10
2001	11
2002	12
2003	7
2004	5
2005	14
2006	13

All-Time Record Progression

3 new records

3 all-time records were set at Mio Hydro Plt between 20 August 1947 and 18 July 2006. Each dot is a new record.

When Mio Hydro Plt set new all-time records
Date	Kind	Detail
1947-08-20	Record daily precipitation	Record daily precipitation 77.0 mm (3.0 in)
1990-08-19	Record daily precipitation	Record daily precipitation 79.5 mm (3.1 in)
2006-07-18	Record daily precipitation	Record daily precipitation 95.3 mm (3.8 in)

Wettest Day of Each Month

Jul: 95.3 mm (3.8 in)

The wettest day on record for each calendar month at Mio Hydro Plt. The most was 95.3 mm (3.8 in) on 18 July 2006.

Record daily precipitation for each month at Mio Hydro Plt
Month	Record daily precipitation (mm)	Date
Jan	33.8 mm (1.3 in)	12 January 1898
Feb	36.6 mm (1.4 in)	20 February 1971
Mar	53.8 mm (2.1 in)	31 March 1998
Apr	40.4 mm (1.6 in)	25 April 1929
May	53.1 mm (2.1 in)	26 May 1932
Jun	75.7 mm (3.0 in)	28 June 1931
Jul	95.3 mm (3.8 in)	18 July 2006
Aug	79.5 mm (3.1 in)	19 August 1990
Sep	58.7 mm (2.3 in)	26 September 2005
Oct	53.3 mm (2.1 in)	20 October 1988
Nov	44.5 mm (1.8 in)	29 November 1919
Dec	50.8 mm (2.0 in)	13 December 2004

Period of Record Coverage

1892 to 2006

104 years of record at Mio Hydro Plt, 1892 to 2006. 14 years have data for under 90 percent of days and are left out of rankings: 1892, 1893, 1894, 1896, 1900, 1901, 1904, 1905 and others.

Days with data per year at Mio Hydro Plt
Year	Days with data	Share of year	Complete
1892	37	10%	No
1893	268	73%	No
1894	111	30%	No
1896	165	45%	No
1897	365	100%	Yes
1898	365	100%	Yes
1899	363	99%	Yes
1900	90	25%	No
1901	272	75%	No
1902	357	98%	Yes
1903	358	98%	Yes
1904	213	58%	No
1905	61	17%	No
1906	341	93%	Yes
1917	296	81%	No
1918	363	99%	Yes
1919	359	98%	Yes
1920	357	98%	Yes
1921	346	95%	Yes
1922	362	99%	Yes
1923	363	99%	Yes
1924	363	99%	Yes
1925	359	98%	Yes
1926	364	100%	Yes
1927	362	99%	Yes
1928	364	99%	Yes
1929	363	99%	Yes
1930	364	100%	Yes
1931	363	99%	Yes
1932	363	99%	Yes
1933	365	100%	Yes
1934	365	100%	Yes
1935	358	98%	Yes
1936	366	100%	Yes
1937	358	98%	Yes
1938	362	99%	Yes
1939	356	98%	Yes
1940	365	100%	Yes
1941	363	99%	Yes
1942	363	99%	Yes
1943	361	99%	Yes
1944	364	99%	Yes
1945	362	99%	Yes
1946	364	100%	Yes
1947	364	100%	Yes
1948	366	100%	Yes
1949	364	100%	Yes
1950	365	100%	Yes
1951	364	100%	Yes
1952	365	100%	Yes
1953	365	100%	Yes
1954	365	100%	Yes
1955	364	100%	Yes
1956	366	100%	Yes
1957	365	100%	Yes
1958	354	97%	Yes
1959	364	100%	Yes
1960	325	89%	No
1961	365	100%	Yes
1962	362	99%	Yes
1963	364	100%	Yes
1964	360	98%	Yes
1965	365	100%	Yes
1966	363	99%	Yes
1967	365	100%	Yes
1968	366	100%	Yes
1969	359	98%	Yes
1970	359	98%	Yes
1971	364	100%	Yes
1972	365	100%	Yes
1973	363	99%	Yes
1974	361	99%	Yes
1975	362	99%	Yes
1976	364	99%	Yes
1977	365	100%	Yes
1978	363	99%	Yes
1979	364	100%	Yes
1980	364	99%	Yes
1981	363	99%	Yes
1982	328	90%	No
1983	362	99%	Yes
1984	361	99%	Yes
1985	358	98%	Yes
1986	364	100%	Yes
1987	302	83%	No
1988	366	100%	Yes
1989	335	92%	Yes
1990	361	99%	Yes
1991	360	99%	Yes
1992	329	90%	No
1993	362	99%	Yes
1994	361	99%	Yes
1995	328	90%	No
1996	362	99%	Yes
1997	362	99%	Yes
1998	365	100%	Yes
1999	361	99%	Yes
2000	347	95%	Yes
2001	360	99%	Yes
2002	363	99%	Yes
2003	352	96%	Yes
2004	360	98%	Yes
2005	337	92%	Yes
2006	350	96%	Yes

Latest Records

Latest records at Mio Hydro Plt
Date	Station	Record	Value	Beat old record by	Old record stood	Significance
18 December 2006	Mio Hydro Plt, US	daily high max	10.6 C (51.1 F)	0.6 C (1.1 F)	75 years	33 of 100 (Routine)
18 December 2006	Mio Hydro Plt, US	daily high min (Tie)	0.0 C (32.0 F)	tie	16 years	3 of 100 (Routine)
28 November 2006	Mio Hydro Plt, US	daily high min	4.4 C (39.9 F)	1.1 C (2.0 F)	72 years	33 of 100 (Routine)
26 November 2006	Mio Hydro Plt, US	daily high min	5.6 C (42.1 F)	2.3 C (4.1 F)	4 years	15 of 100 (Routine)
11 November 2006	Mio Hydro Plt, US	daily snowfall	10.2 cm (4.0 in)	5.1 cm (2.0 in)	72 years	43 of 100 (Notable)
11 November 2006	Mio Hydro Plt, US	daily rain	22.6 mm (0.9 in)	4.1 mm (0.16 in)	11 years	19 of 100 (Routine)
29 October 2006	Mio Hydro Plt, US	daily rain	14.5 mm (0.6 in)	1.5 mm (0.06 in)	44 years	20 of 100 (Routine)
13 October 2006	Mio Hydro Plt, US	daily low max	1.1 C (34.0 F)	4.5 C (8.1 F)	67 years	37 of 100 (Notable)
4 October 2006	Mio Hydro Plt, US	daily rain	47.2 mm (1.9 in)	14.4 mm (0.6 in)	73 years	51 of 100 (Notable)
25 August 2006	Mio Hydro Plt, US	daily rain	29.5 mm (1.2 in)	6.6 mm (0.26 in)	104 years	46 of 100 (Notable)
4 August 2006	Mio Hydro Plt, US	daily high max	36.1 C (97.0 F)	1.1 C (2.0 F)	17 years	17 of 100 (Routine)
1 August 2006	Mio Hydro Plt, US	daily high min	22.2 C (72.0 F)	2.2 C (4.0 F)	51 years	29 of 100 (Routine)
29 July 2006	Mio Hydro Plt, US	daily high min	22.8 C (73.0 F)	1.1 C (2.0 F)	65 years	31 of 100 (Routine)
26 July 2006	Mio Hydro Plt, US	daily high min (Tie)	20.0 C (68.0 F)	tie	52 years	6 of 100 (Routine)
18 July 2006	Mio Hydro Plt, US	all-time rain	95.3 mm (3.8 in)	15.8 mm (0.6 in)	15 years	48 of 100 (Notable)
17 July 2006	Mio Hydro Plt, US	daily high min	22.2 C (72.0 F)	1.1 C (2.0 F)	7 years	14 of 100 (Routine)
27 June 2006	Mio Hydro Plt, US	daily rain	31.8 mm (1.3 in)	0.8 mm (0.03 in)	20 years	16 of 100 (Routine)
18 June 2006	Mio Hydro Plt, US	monthly high min (Tie)	23.3 C (73.9 F)	tie	40 years	8 of 100 (Routine)
31 May 2006	Mio Hydro Plt, US	monthly high min (Tie)	19.4 C (66.9 F)	tie	88 years	11 of 100 (Routine)
30 May 2006	Mio Hydro Plt, US	daily high min (Tie)	18.3 C (64.9 F)	tie	76 years	8 of 100 (Routine)

Climate Trend

87 complete years, 1897 to 2006

One stripe for each of 87 complete years at Mio Hydro Plt, 1897 to 2006. Blue stripes are years cooler than the station's own mean of 6.3 C (43.3 F); red stripes are warmer. The coolest year was 1924, at 4.2 C (39.6 F), and the warmest was 1921, at 9.1 C (48.4 F). The strongest colour marks a difference of 2.9 C (5.2 F).

Annual mean temperature at Mio Hydro Plt as warming stripes, 1897 to 2006
Year	Annual mean temperature	Difference from the station mean
1897	5.3 C	-1.01 C
1898	6.0 C	-0.33 C
1899	5.3 C	-0.99 C
1902	6.1 C	-0.19 C
1903	5.4 C	-0.84 C
1918	5.7 C	-0.59 C
1919	6.9 C	+0.63 C
1920	6.3 C	+0.01 C
1921	9.1 C	+2.84 C
1922	6.9 C	+0.57 C
1923	4.9 C	-1.37 C
1924	4.2 C	-2.04 C
1925	5.2 C	-1.06 C
1926	4.5 C	-1.83 C
1927	5.7 C	-0.56 C
1928	5.5 C	-0.81 C
1929	5.1 C	-1.17 C
1930	6.6 C	+0.33 C
1931	7.9 C	+1.64 C
1932	6.0 C	-0.30 C
1933	5.8 C	-0.46 C
1934	4.9 C	-1.38 C
1935	4.9 C	-1.43 C
1936	5.0 C	-1.25 C
1937	5.7 C	-0.61 C
1938	6.8 C	+0.54 C
1939	6.4 C	+0.15 C
1940	5.4 C	-0.86 C
1941	6.9 C	+0.64 C
1942	6.4 C	+0.12 C
1943	5.3 C	-0.97 C
1944	6.9 C	+0.64 C
1945	5.6 C	-0.66 C
1946	6.0 C	-0.26 C
1947	5.6 C	-0.72 C
1948	5.5 C	-0.75 C
1949	6.6 C	+0.36 C
1950	5.3 C	-1.03 C
1951	5.8 C	-0.49 C
1952	6.6 C	+0.31 C
1953	7.2 C	+0.91 C
1954	6.0 C	-0.26 C
1955	6.6 C	+0.34 C
1956	5.3 C	-0.97 C
1957	5.8 C	-0.48 C
1958	5.4 C	-0.92 C
1959	5.9 C	-0.34 C
1961	6.1 C	-0.23 C
1962	5.3 C	-0.96 C
1963	5.3 C	-0.96 C
1964	6.5 C	+0.17 C
1965	6.5 C	+0.22 C
1966	6.7 C	+0.38 C
1967	6.1 C	-0.14 C
1968	6.9 C	+0.58 C
1969	6.5 C	+0.18 C
1970	6.8 C	+0.52 C
1971	7.0 C	+0.73 C
1972	5.8 C	-0.52 C
1973	7.9 C	+1.57 C
1974	6.5 C	+0.19 C
1975	7.2 C	+0.93 C
1976	6.2 C	-0.09 C
1977	7.0 C	+0.75 C
1978	6.1 C	-0.19 C
1979	5.7 C	-0.60 C
1980	5.4 C	-0.84 C
1981	6.6 C	+0.28 C
1983	7.0 C	+0.69 C
1984	6.6 C	+0.35 C
1985	6.2 C	-0.10 C
1986	6.7 C	+0.39 C
1988	6.6 C	+0.35 C
1990	7.3 C	+0.97 C
1991	7.4 C	+1.10 C
1993	6.0 C	-0.31 C
1996	5.5 C	-0.74 C
1997	6.0 C	-0.33 C
1998	8.9 C	+2.57 C
1999	7.6 C	+1.36 C
2000	6.9 C	+0.57 C
2001	8.2 C	+1.89 C
2002	7.5 C	+1.17 C
2003	6.6 C	+0.27 C
2004	7.0 C	+0.72 C
2005	7.9 C	+1.60 C
2006	8.6 C	+2.27 C

The annual mean temperature here has risen by 0.2 C (0.1 to 0.2) per decade over 1897 to 2006. In Fahrenheit: 0.3 F (0.2 to 0.4) per decade. The slope is a straight line fitted to 87 complete years; the brackets give its 95 percent interval.

Fitted temperature trends per decade at Mio Hydro Plt
Measure	Per decade (C)	Per decade (F)	Period	Complete years	Reading
Annual mean temperature	0.2 C (0.1 to 0.2) per decade	0.3 F (0.2 to 0.4) per decade	1897 to 2006	87	Rise
Mean daily maximum	0.1 C (0.1 to 0.2) per decade	0.2 F (0.1 to 0.3) per decade	1897 to 2006	87	Rise
Mean daily minimum	0.2 C (0.1 to 0.3) per decade	0.4 F (0.2 to 0.5) per decade	1897 to 2006	87	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

1892 to 2006

Yearly extremes at Mio Hydro Plt: the record and the median year
Measure	Record	Year of the record	Median year	Years with a value
Hottest day (TXx)	44.4 C (111.9 F)	1936	34.4 C (93.9 F)	104
Coldest night (TNn)	-43.9 C (-47.0 F)	1918	-30.6 C (-23.1 F)	104
Wettest day (Rx1day)	95.3 mm (3.8 in)	2006	40.6 mm (1.6 in)	102
Wettest five days (Rx5day)	115.9 mm (4.6 in)	1987	63.3 mm (2.5 in)	102
Longest dry spell (CDD)	42 days	1995	20 days	102

Hottest day (TXx)

The hottest day of the year at Mio Hydro Plt, 1892 to 2006. The record is 44.4 C (111.9 F) in 1936, marked on the chart; the median year is 34.4 C (93.9 F).

Hottest day (TXx) at Mio Hydro Plt by year
Year	Hottest day (TXx)
1892	26.7 C (80.1 F)
1893	37.8 C (100.0 F)
1894	30.6 C (87.1 F)
1896	26.1 C (79.0 F)
1897	36.1 C (97.0 F)
1898	34.4 C (93.9 F)
1899	35.0 C (95.0 F)
1900	13.9 C (57.0 F)
1901	37.2 C (99.0 F)
1902	31.1 C (88.0 F)
1903	32.2 C (90.0 F)
1904	32.2 C (90.0 F)
1905	15.6 C (60.1 F)
1906	32.2 C (90.0 F)
1917	36.1 C (97.0 F)
1918	37.8 C (100.0 F)
1919	36.7 C (98.1 F)
1920	33.3 C (91.9 F)
1921	42.2 C (108.0 F)
1922	33.3 C (91.9 F)
1923	35.0 C (95.0 F)
1924	32.2 C (90.0 F)
1925	34.4 C (93.9 F)
1926	35.6 C (96.1 F)
1927	36.1 C (97.0 F)
1928	36.7 C (98.1 F)
1929	33.9 C (93.0 F)
1930	34.4 C (93.9 F)
1931	36.7 C (98.1 F)
1932	33.3 C (91.9 F)
1933	36.7 C (98.1 F)
1934	38.9 C (102.0 F)
1935	32.2 C (90.0 F)
1936	44.4 C (111.9 F)
1937	36.1 C (97.0 F)
1938	36.1 C (97.0 F)
1939	35.0 C (95.0 F)
1940	35.0 C (95.0 F)
1941	36.1 C (97.0 F)
1942	35.0 C (95.0 F)
1943	33.3 C (91.9 F)
1944	36.1 C (97.0 F)
1945	35.6 C (96.1 F)
1946	33.3 C (91.9 F)
1947	37.2 C (99.0 F)
1948	37.2 C (99.0 F)
1949	35.6 C (96.1 F)
1950	33.3 C (91.9 F)
1951	32.2 C (90.0 F)
1952	34.4 C (93.9 F)
1953	35.0 C (95.0 F)
1954	32.2 C (90.0 F)
1955	37.8 C (100.0 F)
1956	35.6 C (96.1 F)
1957	33.3 C (91.9 F)
1958	32.2 C (90.0 F)
1959	33.3 C (91.9 F)
1960	32.2 C (90.0 F)
1961	33.3 C (91.9 F)
1962	32.8 C (91.0 F)
1963	33.9 C (93.0 F)
1964	35.0 C (95.0 F)
1965	33.9 C (93.0 F)
1966	36.1 C (97.0 F)
1967	30.0 C (86.0 F)
1968	33.3 C (91.9 F)
1969	33.3 C (91.9 F)
1970	34.4 C (93.9 F)
1971	35.6 C (96.1 F)
1972	32.8 C (91.0 F)
1973	35.0 C (95.0 F)
1974	33.3 C (91.9 F)
1975	35.6 C (96.1 F)
1976	33.3 C (91.9 F)
1977	36.1 C (97.0 F)
1978	32.8 C (91.0 F)
1979	32.2 C (90.0 F)
1980	32.8 C (91.0 F)
1981	34.4 C (93.9 F)
1982	32.2 C (90.0 F)
1983	37.2 C (99.0 F)
1984	33.3 C (91.9 F)
1985	33.9 C (93.0 F)
1986	35.0 C (95.0 F)
1987	37.8 C (100.0 F)
1988	38.3 C (100.9 F)
1989	35.0 C (95.0 F)
1990	35.0 C (95.0 F)
1991	33.9 C (93.0 F)
1992	35.0 C (95.0 F)
1993	33.3 C (91.9 F)
1994	36.7 C (98.1 F)
1995	39.4 C (102.9 F)
1996	33.3 C (91.9 F)
1997	33.9 C (93.0 F)
1998	36.1 C (97.0 F)
1999	33.9 C (93.0 F)
2000	30.6 C (87.1 F)
2001	37.2 C (99.0 F)
2002	35.6 C (96.1 F)
2003	32.8 C (91.0 F)
2004	32.2 C (90.0 F)
2005	35.0 C (95.0 F)
2006	36.1 C (97.0 F)

Coldest night (TNn)

The coldest night of the year at Mio Hydro Plt, 1892 to 2006. The record is -43.9 C (-47.0 F) in 1918, marked on the chart; the median year is -30.6 C (-23.1 F).

Coldest night (TNn) at Mio Hydro Plt by year
Year	Coldest night (TNn)
1892	0.0 C (32.0 F)
1893	-22.8 C (-9.0 F)
1894	-28.9 C (-20.0 F)
1896	-17.2 C (1.0 F)
1897	-28.9 C (-20.0 F)
1898	-31.1 C (-24.0 F)
1899	-38.9 C (-38.0 F)
1900	-28.9 C (-20.0 F)
1901	-22.2 C (-8.0 F)
1902	-25.6 C (-14.1 F)
1903	-28.9 C (-20.0 F)
1904	-31.7 C (-25.1 F)
1905	-20.0 C (-4.0 F)
1906	-30.6 C (-23.1 F)
1917	-36.1 C (-33.0 F)
1918	-43.9 C (-47.0 F)
1919	-28.9 C (-20.0 F)
1920	-36.7 C (-34.1 F)
1921	-25.6 C (-14.1 F)
1922	-33.3 C (-27.9 F)
1923	-31.1 C (-24.0 F)
1924	-34.4 C (-29.9 F)
1925	-35.0 C (-31.0 F)
1926	-33.3 C (-27.9 F)
1927	-37.2 C (-35.0 F)
1928	-37.8 C (-36.0 F)
1929	-41.7 C (-43.1 F)
1930	-32.2 C (-26.0 F)
1931	-26.7 C (-16.1 F)
1932	-27.8 C (-18.0 F)
1933	-36.1 C (-33.0 F)
1934	-42.8 C (-45.0 F)
1935	-34.4 C (-29.9 F)
1936	-37.2 C (-35.0 F)
1937	-26.7 C (-16.1 F)
1938	-33.9 C (-29.0 F)
1939	-31.7 C (-25.1 F)
1940	-31.7 C (-25.1 F)
1941	-33.9 C (-29.0 F)
1942	-33.9 C (-29.0 F)
1943	-39.4 C (-38.9 F)
1944	-30.0 C (-22.0 F)
1945	-31.7 C (-25.1 F)
1946	-31.7 C (-25.1 F)
1947	-34.4 C (-29.9 F)
1948	-36.1 C (-33.0 F)
1949	-23.9 C (-11.0 F)
1950	-32.2 C (-26.0 F)
1951	-38.9 C (-38.0 F)
1952	-31.7 C (-25.1 F)
1953	-27.8 C (-18.0 F)
1954	-30.0 C (-22.0 F)
1955	-30.6 C (-23.1 F)
1956	-26.1 C (-15.0 F)
1957	-28.3 C (-18.9 F)
1958	-32.2 C (-26.0 F)
1959	-35.6 C (-32.1 F)
1960	-28.3 C (-18.9 F)
1961	-29.4 C (-20.9 F)
1962	-33.3 C (-27.9 F)
1963	-32.2 C (-26.0 F)
1964	-27.8 C (-18.0 F)
1965	-28.3 C (-18.9 F)
1966	-27.8 C (-18.0 F)
1967	-31.7 C (-25.1 F)
1968	-32.2 C (-26.0 F)
1969	-25.0 C (-13.0 F)
1970	-32.2 C (-26.0 F)
1971	-29.4 C (-20.9 F)
1972	-27.8 C (-18.0 F)
1973	-30.6 C (-23.1 F)
1974	-28.3 C (-18.9 F)
1975	-28.3 C (-18.9 F)
1976	-31.7 C (-25.1 F)
1977	-33.3 C (-27.9 F)
1978	-30.6 C (-23.1 F)
1979	-38.9 C (-38.0 F)
1980	-30.0 C (-22.0 F)
1981	-35.0 C (-31.0 F)
1982	-30.0 C (-22.0 F)
1983	-26.7 C (-16.1 F)
1984	-33.3 C (-27.9 F)
1985	-31.7 C (-25.1 F)
1986	-28.9 C (-20.0 F)
1987	-31.7 C (-25.1 F)
1988	-28.3 C (-18.9 F)
1989	-27.8 C (-18.0 F)
1990	-23.9 C (-11.0 F)
1991	-26.7 C (-16.1 F)
1992	-27.8 C (-18.0 F)
1993	-30.6 C (-23.1 F)
1994	-33.9 C (-29.0 F)
1995	-27.2 C (-17.0 F)
1996	-35.0 C (-31.0 F)
1997	-28.3 C (-18.9 F)
1998	-23.9 C (-11.0 F)
1999	-26.7 C (-16.1 F)
2000	-27.2 C (-17.0 F)
2001	-23.9 C (-11.0 F)
2002	-23.9 C (-11.0 F)
2003	-28.9 C (-20.0 F)
2004	-29.4 C (-20.9 F)
2005	-28.3 C (-18.9 F)
2006	-20.6 C (-5.1 F)

Wettest day (Rx1day)

The wettest day of the year at Mio Hydro Plt, 1892 to 2006. The record is 95.3 mm (3.8 in) in 2006, marked on the chart; the median year is 40.6 mm (1.6 in).

Wettest day (Rx1day) at Mio Hydro Plt by year
Year	Wettest day (Rx1day)
1892	57.9 mm (2.3 in)
1893	n/a
1894	n/a
1896	50.8 mm (2.0 in)
1897	38.1 mm (1.5 in)
1898	66.0 mm (2.6 in)
1899	48.0 mm (1.9 in)
1900	30.5 mm (1.2 in)
1901	40.6 mm (1.6 in)
1902	33.8 mm (1.3 in)
1903	34.5 mm (1.4 in)
1904	34.5 mm (1.4 in)
1905	21.8 mm (0.9 in)
1906	45.7 mm (1.8 in)
1917	33.0 mm (1.3 in)
1918	43.9 mm (1.7 in)
1919	50.8 mm (2.0 in)
1920	31.2 mm (1.2 in)
1921	68.6 mm (2.7 in)
1922	49.3 mm (1.9 in)
1923	42.9 mm (1.7 in)
1924	41.9 mm (1.6 in)
1925	35.6 mm (1.4 in)
1926	50.8 mm (2.0 in)
1927	40.1 mm (1.6 in)
1928	37.8 mm (1.5 in)
1929	40.4 mm (1.6 in)
1930	41.9 mm (1.6 in)
1931	75.7 mm (3.0 in)
1932	53.1 mm (2.1 in)
1933	25.9 mm (1.0 in)
1934	43.9 mm (1.7 in)
1935	37.6 mm (1.5 in)
1936	33.0 mm (1.3 in)
1937	53.1 mm (2.1 in)
1938	50.3 mm (2.0 in)
1939	25.4 mm (1.0 in)
1940	49.5 mm (1.9 in)
1941	53.3 mm (2.1 in)
1942	39.6 mm (1.6 in)
1943	55.1 mm (2.2 in)
1944	29.0 mm (1.1 in)
1945	34.5 mm (1.4 in)
1946	39.6 mm (1.6 in)
1947	77.0 mm (3.0 in)
1948	42.2 mm (1.7 in)
1949	26.2 mm (1.0 in)
1950	39.1 mm (1.5 in)
1951	47.5 mm (1.9 in)
1952	32.5 mm (1.3 in)
1953	40.1 mm (1.6 in)
1954	34.3 mm (1.4 in)
1955	33.3 mm (1.3 in)
1956	31.5 mm (1.2 in)
1957	41.4 mm (1.6 in)
1958	27.4 mm (1.1 in)
1959	40.1 mm (1.6 in)
1960	63.8 mm (2.5 in)
1961	49.3 mm (1.9 in)
1962	31.8 mm (1.3 in)
1963	56.9 mm (2.2 in)
1964	49.5 mm (1.9 in)
1965	32.3 mm (1.3 in)
1966	28.4 mm (1.1 in)
1967	65.0 mm (2.6 in)
1968	34.5 mm (1.4 in)
1969	44.5 mm (1.8 in)
1970	31.2 mm (1.2 in)
1971	36.6 mm (1.4 in)
1972	50.8 mm (2.0 in)
1973	43.2 mm (1.7 in)
1974	31.8 mm (1.3 in)
1975	42.7 mm (1.7 in)
1976	30.2 mm (1.2 in)
1977	25.9 mm (1.0 in)
1978	54.1 mm (2.1 in)
1979	46.2 mm (1.8 in)
1980	40.6 mm (1.6 in)
1981	33.0 mm (1.3 in)
1982	27.4 mm (1.1 in)
1983	35.6 mm (1.4 in)
1984	59.7 mm (2.4 in)
1985	43.7 mm (1.7 in)
1986	40.1 mm (1.6 in)
1987	48.8 mm (1.9 in)
1988	53.3 mm (2.1 in)
1989	26.7 mm (1.1 in)
1990	79.5 mm (3.1 in)
1991	49.3 mm (1.9 in)
1992	60.5 mm (2.4 in)
1993	72.4 mm (2.9 in)
1994	34.0 mm (1.3 in)
1995	22.6 mm (0.9 in)
1996	24.1 mm (0.9 in)
1997	36.6 mm (1.4 in)
1998	53.8 mm (2.1 in)
1999	60.7 mm (2.4 in)
2000	39.4 mm (1.6 in)
2001	36.3 mm (1.4 in)
2002	33.3 mm (1.3 in)
2003	41.1 mm (1.6 in)
2004	50.8 mm (2.0 in)
2005	58.7 mm (2.3 in)
2006	95.3 mm (3.8 in)

Wettest five days (Rx5day)

The wettest five days of the year at Mio Hydro Plt, 1892 to 2006. The record is 115.9 mm (4.6 in) in 1987, marked on the chart; the median year is 63.3 mm (2.5 in).

Wettest five days (Rx5day) at Mio Hydro Plt by year
Year	Wettest five days (Rx5day)
1892	57.9 mm (2.3 in)
1893	n/a
1894	n/a
1896	84.3 mm (3.3 in)
1897	76.6 mm (3.0 in)
1898	109.4 mm (4.3 in)
1899	88.5 mm (3.5 in)
1900	36.6 mm (1.4 in)
1901	71.3 mm (2.8 in)
1902	53.6 mm (2.1 in)
1903	62.9 mm (2.5 in)
1904	47.5 mm (1.9 in)
1905	28.3 mm (1.1 in)
1906	77.5 mm (3.1 in)
1917	36.4 mm (1.4 in)
1918	71.2 mm (2.8 in)
1919	64.4 mm (2.5 in)
1920	53.4 mm (2.1 in)
1921	79.3 mm (3.1 in)
1922	79.2 mm (3.1 in)
1923	61.7 mm (2.4 in)
1924	91.9 mm (3.6 in)
1925	57.4 mm (2.3 in)
1926	55.4 mm (2.2 in)
1927	62.6 mm (2.5 in)
1928	62.0 mm (2.4 in)
1929	48.3 mm (1.9 in)
1930	45.7 mm (1.8 in)
1931	81.8 mm (3.2 in)
1932	58.9 mm (2.3 in)
1933	53.1 mm (2.1 in)
1934	58.1 mm (2.3 in)
1935	64.8 mm (2.6 in)
1936	50.5 mm (2.0 in)
1937	55.1 mm (2.2 in)
1938	73.4 mm (2.9 in)
1939	35.8 mm (1.4 in)
1940	91.1 mm (3.6 in)
1941	53.6 mm (2.1 in)
1942	50.5 mm (2.0 in)
1943	63.7 mm (2.5 in)
1944	47.0 mm (1.9 in)
1945	65.0 mm (2.6 in)
1946	48.0 mm (1.9 in)
1947	112.1 mm (4.4 in)
1948	83.9 mm (3.3 in)
1949	59.2 mm (2.3 in)
1950	63.7 mm (2.5 in)
1951	69.6 mm (2.7 in)
1952	70.9 mm (2.8 in)
1953	66.0 mm (2.6 in)
1954	85.2 mm (3.4 in)
1955	47.7 mm (1.9 in)
1956	44.2 mm (1.7 in)
1957	59.2 mm (2.3 in)
1958	58.2 mm (2.3 in)
1959	68.0 mm (2.7 in)
1960	66.1 mm (2.6 in)
1961	70.9 mm (2.8 in)
1962	60.6 mm (2.4 in)
1963	72.1 mm (2.8 in)
1964	58.9 mm (2.3 in)
1965	54.3 mm (2.1 in)
1966	85.9 mm (3.4 in)
1967	69.3 mm (2.7 in)
1968	67.0 mm (2.6 in)
1969	83.6 mm (3.3 in)
1970	57.1 mm (2.2 in)
1971	57.9 mm (2.3 in)
1972	80.7 mm (3.2 in)
1973	58.9 mm (2.3 in)
1974	66.9 mm (2.6 in)
1975	84.4 mm (3.3 in)
1976	69.9 mm (2.8 in)
1977	58.9 mm (2.3 in)
1978	86.0 mm (3.4 in)
1979	55.8 mm (2.2 in)
1980	59.1 mm (2.3 in)
1981	39.9 mm (1.6 in)
1982	41.9 mm (1.6 in)
1983	57.6 mm (2.3 in)
1984	72.7 mm (2.9 in)
1985	72.2 mm (2.8 in)
1986	74.2 mm (2.9 in)
1987	115.9 mm (4.6 in)
1988	85.6 mm (3.4 in)
1989	41.2 mm (1.6 in)
1990	96.8 mm (3.8 in)
1991	74.6 mm (2.9 in)
1992	53.3 mm (2.1 in)
1993	94.0 mm (3.7 in)
1994	103.1 mm (4.1 in)
1995	53.8 mm (2.1 in)
1996	39.7 mm (1.6 in)
1997	41.4 mm (1.6 in)
1998	82.2 mm (3.2 in)
1999	74.8 mm (2.9 in)
2000	51.1 mm (2.0 in)
2001	54.1 mm (2.1 in)
2002	41.9 mm (1.6 in)
2003	59.7 mm (2.4 in)
2004	76.2 mm (3.0 in)
2005	79.0 mm (3.1 in)
2006	102.9 mm (4.1 in)

Longest dry spell (CDD)

The longest dry spell of the year at Mio Hydro Plt, 1892 to 2006. The record is 42 days in 1995, marked on the chart; the median year is 20 days.

Longest dry spell (CDD) at Mio Hydro Plt by year
Year	Longest dry spell (CDD)
1892	13 days
1893	n/a
1894	n/a
1896	18 days
1897	19 days
1898	21 days
1899	16 days
1900	16 days
1901	19 days
1902	11 days
1903	25 days
1904	15 days
1905	10 days
1906	12 days
1917	19 days
1918	33 days
1919	34 days
1920	18 days
1921	22 days
1922	17 days
1923	15 days
1924	19 days
1925	21 days
1926	16 days
1927	27 days
1928	16 days
1929	26 days
1930	25 days
1931	21 days
1932	17 days
1933	27 days
1934	15 days
1935	13 days
1936	25 days
1937	22 days
1938	21 days
1939	20 days
1940	11 days
1941	14 days
1942	6 days
1943	27 days
1944	23 days
1945	26 days
1946	16 days
1947	23 days
1948	21 days
1949	18 days
1950	12 days
1951	13 days
1952	16 days
1953	19 days
1954	21 days
1955	18 days
1956	15 days
1957	23 days
1958	31 days
1959	15 days
1960	12 days
1961	18 days
1962	22 days
1963	22 days
1964	15 days
1965	14 days
1966	17 days
1967	16 days
1968	17 days
1969	24 days
1970	21 days
1971	20 days
1972	14 days
1973	14 days
1974	15 days
1975	14 days
1976	22 days
1977	22 days
1978	21 days
1979	32 days
1980	21 days
1981	12 days
1982	22 days
1983	24 days
1984	20 days
1985	13 days
1986	23 days
1987	27 days
1988	17 days
1989	24 days
1990	20 days
1991	15 days
1992	14 days
1993	22 days
1994	14 days
1995	42 days
1996	26 days
1997	20 days
1998	23 days
1999	24 days
2000	15 days
2001	26 days
2002	40 days
2003	20 days
2004	33 days
2005	41 days
2006	15 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

87 years with a frost

Across 87 years with a frost, the median last spring frost at Mio Hydro Plt falls on 30 May and the median first autumn frost on 18 September, which leaves a median of 111 days between them.

In 1971 to 2006 the median growing season was 122 days. That is 35 days more than in 1897 to 1942.

Fitted over all years, the growing season changes by +5.5 days per decade at this station.

Frost dates and growing season at Mio Hydro Plt
Measure	Median, all years	Earliest period (1897 to 1942)	Recent period (1971 to 2006)	Recent against earliest	Fitted trend
Last spring frost	30 May	9 June	26 May	14 days earlier	-1.4 days per decade
First autumn frost	18 September	4 September	25 September	21 days later	+4.0 days per decade
Growing days	111 days	87 days	122 days	35 days more	+5.5 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

88 years, 1897 to 2005

A day with at least 40.4 mm (1.6 in) of rain is expected about once in 2 years. A day with at least 84.2 mm (3.3 in) of rain is expected about once in 100 years.

Rainfall return levels at Mio Hydro Plt: the daily rain expected about once in a given number of years
Expected about once in	A day with at least	Note
2 years	40.4 mm (1.6 in)
5 years	51.8 mm (2.0 in)
10 years	59.4 mm (2.3 in)
25 years	69.3 mm (2.7 in)
50 years	76.7 mm (3.0 in)
100 years	84.2 mm (3.3 in)	Longer than the 88 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, 88 years of values from 1897 to 2005.

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: 79.5 mm (3.1 in) in 1990; 77.0 mm (3.0 in) in 1947; 75.7 mm (3.0 in) in 1931.

Station Changes

No change in the annual mean temperature of this station was found against its neighbours.

Download the Data

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

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