Tomakomai Weather Records (JA000047424)

Record envelope, standing records and threshold days for Tomakomai (JA000047424), Japan, with 76 years of record.

Key Facts for Tomakomai

Tomakomai (JA000047424) is a weather station in Japan at 42.62 latitude and 141.55 longitude, 11 m (36 ft) above sea level.
The station reports from 1951 to 2026, 76 years of record.
1,464 records set at Tomakomai still stand.
Records are tracked for tmax, tmin, prcp: an element needs 30 years of data to be eligible.
Tomakomai set a daily record high maximum temperature of 23.4 C (74.1 F) on 9 October 2026 (provisional).

Provisional Records

Records set in the last 60 days are provisional until they clear the revision window.

About the Station

Location: Japan, 42.62 latitude, 141.55 longitude.
Elevation: 11 m (36 ft).
Period of record: 1951 to 2026, 76 years.
Eligible elements: tmax, tmin, prcp.

Daily Record Envelope and 2026

8 days at or beyond a record

The band shows the record high and record low for each calendar day at Tomakomai. The lines show the 2026 daily maximum and minimum. 8 days in 2026 matched or passed a record. Temperatures are in degrees Celsius.

Daily record high and record low at Tomakomai, with 2026 drawn through them
Month	Highest record high	Lowest record low	2026 highest maximum	2026 lowest minimum
Jan	10.0 C (50.0 F)	-20.5 C (-4.9 F)	6.6 C (43.9 F)	-12.2 C (10.0 F)
Feb	12.7 C (54.9 F)	-20.9 C (-5.6 F)	7.2 C (45.0 F)	-15.3 C (4.5 F)
Mar	15.5 C (59.9 F)	-16.3 C (2.7 F)	10.2 C (50.4 F)	-5.4 C (22.3 F)
Apr	21.8 C (71.2 F)	-8.8 C (16.2 F)	16.8 C (62.2 F)	-0.8 C (30.6 F)
May	27.3 C (81.1 F)	-3.9 C (25.0 F)	24.6 C (76.3 F)	3.2 C (37.8 F)
Jun	30.6 C (87.1 F)	1.8 C (35.2 F)	23.4 C (74.1 F)	8.7 C (47.7 F)
Jul	33.8 C (92.8 F)	6.5 C (43.7 F)	26.8 C (80.2 F)	14.6 C (58.3 F)
Aug	35.5 C (95.9 F)	9.2 C (48.6 F)	31.2 C (88.2 F)	15.8 C (60.4 F)
Sep	29.5 C (85.1 F)	2.4 C (36.3 F)	25.6 C (78.1 F)	9.2 C (48.6 F)
Oct	27.2 C (81.0 F)	-3.9 C (25.0 F)	23.4 C (74.1 F)	8.3 C (46.9 F)
Nov	20.5 C (68.9 F)	-12.6 C (9.3 F)	n/a	n/a
Dec	17.8 C (64.0 F)	-16.7 C (1.9 F)	n/a	n/a

Which Years Hold Standing Records

1,464 standing records

1,464 records at Tomakomai still stand. 2025 holds the most, with 97.

Standing records at Tomakomai by the year they were set
Year set	Standing records
1951	38
1952	43
1953	43
1954	29
1955	24
1956	19
1957	21
1958	7
1959	15
1960	18
1961	17
1962	18
1963	18
1964	27
1965	21
1966	31
1967	29
1968	30
1969	52
1970	29
1971	23
1972	14
1973	21
1974	18
1975	14
1976	16
1977	15
1978	29
1979	30
1980	24
1981	24
1982	17
1983	24
1984	34
1985	15
1986	10
1987	19
1988	15
1989	17
1990	1
1991	3
1994	13
1995	2
1996	16
1997	16
1998	19
1999	20
2000	5
2001	8
2002	15
2003	13
2004	11
2005	7
2006	3
2007	14
2008	11
2009	12
2010	15
2011	6
2012	16
2013	6
2014	9
2015	12
2016	19
2017	7
2018	22
2019	11
2020	18
2021	23
2022	22
2023	32
2024	26
2025	97
2026	26

All-Time Record Progression

10 new records

10 all-time records were set at Tomakomai between 4 August 1981 and 11 July 2026. Each dot is a new record.

When Tomakomai set new all-time records
Date	Kind	Detail
1981-08-04	Record daily precipitation	Record daily precipitation 176.0 mm (6.9 in)
1982-08-04	Record high maximum temperature	Record high maximum temperature 30.7 C (87.3 F)
1984-08-06	Record high minimum temperature	Record high minimum temperature 23.6 C (74.5 F)
1985-08-12	Record high maximum temperature	Record high maximum temperature 31.6 C (88.9 F)
1987-08-26	Record daily precipitation	Record daily precipitation 195.5 mm (7.7 in)
1994-08-03	Record high maximum temperature	Record high maximum temperature 32.2 C (90.0 F)
1994-08-04	Record high maximum temperature	Record high maximum temperature 33.3 C (91.9 F)
2007-08-15	Record high maximum temperature	Record high maximum temperature 35.5 C (95.9 F)
2023-08-04	Record high minimum temperature	Record high minimum temperature 23.8 C (74.8 F)
2026-07-11	Record daily precipitation	Record daily precipitation 369.5 mm (14.5 in)

Wettest Day of Each Month

Jul: 369.5 mm (14.5 in)

The wettest day on record for each calendar month at Tomakomai. The most was 369.5 mm (14.5 in) on 11 July 2026.

Record daily precipitation for each month at Tomakomai
Month	Record daily precipitation (mm)	Date
Jan	63.0 mm (2.5 in)	31 January 1970
Feb	77.5 mm (3.1 in)	23 February 2004
Mar	69.1 mm (2.7 in)	10 March 2015
Apr	72.5 mm (2.9 in)	24 April 1985
May	119.9 mm (4.7 in)	27 May 1994
Jun	100.5 mm (4.0 in)	29 June 1989
Jul	369.5 mm (14.5 in)	11 July 2026
Aug	195.5 mm (7.7 in)	26 August 1987
Sep	153.9 mm (6.1 in)	11 September 2014
Oct	116.1 mm (4.6 in)	4 October 2019
Nov	90.5 mm (3.6 in)	7 November 1975
Dec	78.0 mm (3.1 in)	4 December 2012

Period of Record Coverage

1951 to 2026

75 years of record at Tomakomai, 1951 to 2026. 29 years have data for under 90 percent of days and are left out of rankings: 1990, 1991, 1993, 1994, 1995, 1996, 1997, 1998 and others.

Days with data per year at Tomakomai
Year	Days with data	Share of year	Complete
1951	365	100%	Yes
1952	366	100%	Yes
1953	363	99%	Yes
1954	363	99%	Yes
1955	358	98%	Yes
1956	362	99%	Yes
1957	362	99%	Yes
1958	360	99%	Yes
1959	363	99%	Yes
1960	364	99%	Yes
1961	357	98%	Yes
1962	362	99%	Yes
1963	363	99%	Yes
1964	366	100%	Yes
1965	365	100%	Yes
1966	365	100%	Yes
1967	365	100%	Yes
1968	366	100%	Yes
1969	365	100%	Yes
1970	365	100%	Yes
1971	365	100%	Yes
1972	366	100%	Yes
1973	365	100%	Yes
1974	365	100%	Yes
1975	365	100%	Yes
1976	366	100%	Yes
1977	365	100%	Yes
1978	365	100%	Yes
1979	365	100%	Yes
1980	366	100%	Yes
1981	365	100%	Yes
1982	365	100%	Yes
1983	365	100%	Yes
1984	366	100%	Yes
1985	365	100%	Yes
1986	365	100%	Yes
1987	365	100%	Yes
1988	366	100%	Yes
1989	365	100%	Yes
1990	3	1%	No
1991	1	0%	No
1993	1	0%	No
1994	248	68%	No
1995	312	85%	No
1996	321	88%	No
1997	302	83%	No
1998	310	85%	No
1999	309	85%	No
2000	328	90%	No
2001	275	75%	No
2002	321	88%	No
2003	313	86%	No
2004	311	85%	No
2005	332	91%	Yes
2006	327	90%	No
2007	337	92%	Yes
2008	335	92%	Yes
2009	321	88%	No
2010	319	87%	No
2011	334	92%	Yes
2012	322	88%	No
2013	317	87%	No
2014	329	90%	Yes
2015	323	88%	No
2016	332	91%	Yes
2017	327	90%	No
2018	324	89%	No
2019	328	90%	No
2020	309	84%	No
2021	313	86%	No
2022	325	89%	No
2023	250	68%	No
2024	281	77%	No
2025	356	98%	Yes
2026	275	75%	No

Latest Records

Latest records at Tomakomai
Date	Station	Record	Value	Beat old record by	Old record stood	Significance
9 October 2026	Tomakomai, JP	daily high max (Provisional)	23.4 C (74.1 F)	1.0 C (1.8 F)	32 years	19 of 100 (Routine)
5 October 2026	Tomakomai, JP	daily high min (Provisional)	16.4 C (61.5 F)	1.8 C (3.2 F)	0 years	11 of 100 (Routine)
28 September 2026	Tomakomai, JP	daily rain (Provisional)	59.5 mm (2.3 in)	9.5 mm (0.37 in)	24 years	18 of 100 (Routine)
27 September 2026	Tomakomai, JP	daily high min (Provisional)	19.2 C (66.6 F)	4.0 C (7.2 F)	35 years	27 of 100 (Routine)
22 September 2026	Tomakomai, JP	daily high max (Provisional)	25.6 C (78.1 F)	1.1 C (2.0 F)	43 years	23 of 100 (Routine)
13 September 2026	Tomakomai, JP	daily high min (Provisional)	19.4 C (66.9 F)	0.9 C (1.6 F)	0 years	9 of 100 (Routine)
3 September 2026	Tomakomai, JP	all-time rain (Provisional)	454.5 mm (17.9 in)	85.0 mm (3.3 in)	0 years	67 of 100 (Major)
2 September 2026	Tomakomai, JP	monthly rain (Provisional)	254.5 mm (10.0 in)	28.0 mm (1.1 in)	0 years	31 of 100 (Routine)
1 September 2026	Tomakomai, JP	monthly rain (Provisional)	226.5 mm (8.9 in)	72.6 mm (2.9 in)	11 years	57 of 100 (Notable)
31 August 2026	Tomakomai, JP	daily rain (Provisional)	99.5 mm (3.9 in)	27.6 mm (1.1 in)	4 years	20 of 100 (Routine)
20 August 2026	Tomakomai, JP	daily rain (Provisional)	72.5 mm (2.9 in)	26.5 mm (1.0 in)	21 years	24 of 100 (Routine)
20 August 2026	Tomakomai, JP	daily high max (Tie, Provisional)	27.9 C (82.2 F)	tie	52 years	5 of 100 (Routine)
18 August 2026	Tomakomai, JP	daily rain (Provisional)	115.0 mm (4.5 in)	6.0 mm (0.24 in)	52 years	24 of 100 (Routine)
18 August 2026	Tomakomai, JP	daily high min (Tie, Provisional)	22.1 C (71.8 F)	tie	47 years	5 of 100 (Routine)
13 August 2026	Tomakomai, JP	daily rain	148.0 mm (5.8 in)	12.7 mm (0.5 in)	68 years	32 of 100 (Routine)
8 August 2026	Tomakomai, JP	daily rain	154.0 mm (6.1 in)	63.1 mm (2.5 in)	31 years	43 of 100 (Notable)
7 August 2026	Tomakomai, JP	daily rain	145.5 mm (5.7 in)	126.5 mm (5.0 in)	47 years	61 of 100 (Major)
29 July 2026	Tomakomai, JP	daily low max	18.2 C (64.8 F)	0.1 C (0.2 F)	37 years	18 of 100 (Routine)
13 July 2026	Tomakomai, JP	daily high min	20.9 C (69.6 F)	1.6 C (2.9 F)	48 years	27 of 100 (Routine)
11 July 2026	Tomakomai, JP	all-time rain	369.5 mm (14.5 in)	174.0 mm (6.9 in)	38 years	78 of 100 (Major)

Climate Trend

40 complete years, 1951 to 2025

One stripe for each of 40 complete years at Tomakomai, 1951 to 2025. Blue stripes are years cooler than the station's own mean of 7.1 C (44.8 F); red stripes are warmer. The coolest year was 1969, at 6.1 C (43.0 F), and the warmest was 2025, at 9.9 C (49.7 F). The strongest colour marks a difference of 2.8 C (5.0 F).

Annual mean temperature at Tomakomai as warming stripes, 1951 to 2025
Year	Annual mean temperature	Difference from the station mean
1951	6.8 C	-0.29 C
1952	6.2 C	-0.90 C
1953	6.4 C	-0.75 C
1954	6.7 C	-0.44 C
1955	7.4 C	+0.33 C
1956	7.1 C	-0.03 C
1957	7.3 C	+0.19 C
1958	7.7 C	+0.55 C
1959	7.6 C	+0.47 C
1960	7.1 C	+0.04 C
1961	7.6 C	+0.45 C
1962	7.5 C	+0.44 C
1963	7.7 C	+0.56 C
1964	6.7 C	-0.40 C
1965	6.6 C	-0.50 C
1966	6.8 C	-0.32 C
1967	7.1 C	-0.03 C
1968	7.4 C	+0.30 C
1969	6.1 C	-1.00 C
1970	6.8 C	-0.29 C
1971	6.8 C	-0.33 C
1972	7.8 C	+0.65 C
1973	7.6 C	+0.47 C
1974	7.0 C	-0.15 C
1975	7.5 C	+0.42 C
1976	6.8 C	-0.27 C
1977	6.8 C	-0.32 C
1978	7.0 C	-0.08 C
1979	7.2 C	+0.07 C
1980	6.8 C	-0.31 C
1981	6.6 C	-0.51 C
1982	7.3 C	+0.19 C
1983	6.9 C	-0.23 C
1984	6.4 C	-0.74 C
1985	6.8 C	-0.28 C
1986	6.5 C	-0.60 C
1987	7.0 C	-0.06 C
1988	7.1 C	-0.05 C
1989	8.1 C	+0.96 C
2025	9.9 C	+2.76 C

The annual mean temperature here has risen by 0.2 C (0.1 to 0.3) per decade over 1951 to 2025. In Fahrenheit: 0.3 F (0.1 to 0.6) per decade. The slope is a straight line fitted to 40 complete years; the brackets give its 95 percent interval.

Fitted temperature trends per decade at Tomakomai
Measure	Per decade (C)	Per decade (F)	Period	Complete years	Reading
Annual mean temperature	0.2 C (0.1 to 0.3) per decade	0.3 F (0.1 to 0.6) per decade	1951 to 2025	40	Rise
Mean daily maximum	0.13 C (-0.01 to 0.26) per decade	0.23 F (-0.01 to 0.47) per decade	1951 to 2025	40	Not clearly different from zero
Mean daily minimum	0.3 C (0.1 to 0.4) per decade	0.5 F (0.2 to 0.7) per decade	1951 to 2025	40	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

1951 to 2026

Yearly extremes at Tomakomai: the record and the median year
Measure	Record	Year of the record	Median year	Years with a value
Hottest day (TXx)	35.5 C (95.9 F)	2007	28.7 C (83.7 F)	75
Coldest night (TNn)	-20.9 C (-5.6 F)	1977	-15.8 C (3.6 F)	75
Wettest day (Rx1day)	454.5 mm (17.9 in)	2026	90.7 mm (3.6 in)	72
Wettest five days (Rx5day)	1,071.5 mm (42.2 in)	2026	127.5 mm (5.0 in)	71
Longest dry spell (CDD)	39 days	1967	17 days	70

Hottest day (TXx)

The hottest day of the year at Tomakomai, 1951 to 2026. The record is 35.5 C (95.9 F) in 2007, marked on the chart; the median year is 28.7 C (83.7 F).

Hottest day (TXx) at Tomakomai by year
Year	Hottest day (TXx)
1951	30.5 C (86.9 F)
1952	30.2 C (86.4 F)
1953	27.6 C (81.7 F)
1954	26.2 C (79.2 F)
1955	29.0 C (84.2 F)
1956	27.8 C (82.0 F)
1957	29.6 C (85.3 F)
1958	27.1 C (80.8 F)
1959	28.1 C (82.6 F)
1960	28.2 C (82.8 F)
1961	28.6 C (83.5 F)
1962	26.2 C (79.2 F)
1963	26.7 C (80.1 F)
1964	28.7 C (83.7 F)
1965	26.4 C (79.5 F)
1966	30.0 C (86.0 F)
1967	29.7 C (85.5 F)
1968	27.3 C (81.1 F)
1969	27.7 C (81.9 F)
1970	26.0 C (78.8 F)
1971	27.7 C (81.9 F)
1972	26.7 C (80.1 F)
1973	28.8 C (83.8 F)
1974	27.9 C (82.2 F)
1975	29.2 C (84.6 F)
1976	28.6 C (83.5 F)
1977	27.7 C (81.9 F)
1978	30.6 C (87.1 F)
1979	27.8 C (82.0 F)
1980	26.4 C (79.5 F)
1981	27.7 C (81.9 F)
1982	30.7 C (87.3 F)
1983	27.1 C (80.8 F)
1984	30.3 C (86.5 F)
1985	31.6 C (88.9 F)
1986	28.3 C (82.9 F)
1987	29.6 C (85.3 F)
1988	28.2 C (82.8 F)
1989	31.3 C (88.3 F)
1990	26.5 C (79.7 F)
1991	26.6 C (79.9 F)
1993	25.5 C (77.9 F)
1994	33.3 C (91.9 F)
1995	29.3 C (84.7 F)
1996	27.7 C (81.9 F)
1997	28.7 C (83.7 F)
1998	27.5 C (81.5 F)
1999	29.4 C (84.9 F)
2000	29.9 C (85.8 F)
2001	26.4 C (79.5 F)
2002	28.5 C (83.3 F)
2003	29.2 C (84.6 F)
2004	28.1 C (82.6 F)
2005	30.3 C (86.5 F)
2006	30.2 C (86.4 F)
2007	35.5 C (95.9 F)
2008	28.4 C (83.1 F)
2009	27.6 C (81.7 F)
2010	30.6 C (87.1 F)
2011	31.0 C (87.8 F)
2012	30.3 C (86.5 F)
2013	28.5 C (83.3 F)
2014	29.7 C (85.5 F)
2015	29.5 C (85.1 F)
2016	28.7 C (83.7 F)
2017	29.9 C (85.8 F)
2018	31.6 C (88.9 F)
2019	31.1 C (88.0 F)
2020	30.9 C (87.6 F)
2021	33.8 C (92.8 F)
2022	33.8 C (92.8 F)
2023	32.4 C (90.3 F)
2024	32.3 C (90.1 F)
2025	32.6 C (90.7 F)
2026	31.2 C (88.2 F)

Coldest night (TNn)

The coldest night of the year at Tomakomai, 1951 to 2026. The record is -20.9 C (-5.6 F) in 1977, marked on the chart; the median year is -15.8 C (3.6 F).

Coldest night (TNn) at Tomakomai by year
Year	Coldest night (TNn)
1951	-20.5 C (-4.9 F)
1952	-19.6 C (-3.3 F)
1953	-18.5 C (-1.3 F)
1954	-20.4 C (-4.7 F)
1955	-16.7 C (1.9 F)
1956	-16.3 C (2.7 F)
1957	-16.0 C (3.2 F)
1958	-14.0 C (6.8 F)
1959	-18.3 C (-0.9 F)
1960	-16.8 C (1.8 F)
1961	-16.7 C (1.9 F)
1962	-15.2 C (4.6 F)
1963	-14.7 C (5.5 F)
1964	-15.0 C (5.0 F)
1965	-14.9 C (5.2 F)
1966	-18.6 C (-1.5 F)
1967	-19.2 C (-2.6 F)
1968	-14.6 C (5.7 F)
1969	-17.7 C (0.1 F)
1970	-18.6 C (-1.5 F)
1971	-14.6 C (5.7 F)
1972	-16.3 C (2.7 F)
1973	-15.2 C (4.6 F)
1974	-14.5 C (5.9 F)
1975	-15.9 C (3.4 F)
1976	-16.6 C (2.1 F)
1977	-20.9 C (-5.6 F)
1978	-18.3 C (-0.9 F)
1979	-16.9 C (1.6 F)
1980	-16.5 C (2.3 F)
1981	-14.7 C (5.5 F)
1982	-17.1 C (1.2 F)
1983	-14.0 C (6.8 F)
1984	-17.4 C (0.7 F)
1985	-18.6 C (-1.5 F)
1986	-16.6 C (2.1 F)
1987	-16.6 C (2.1 F)
1988	-14.9 C (5.2 F)
1989	-12.4 C (9.7 F)
1990	19.7 C (67.5 F)
1991	15.2 C (59.4 F)
1993	20.2 C (68.4 F)
1994	-13.7 C (7.3 F)
1995	-14.2 C (6.4 F)
1996	-19.0 C (-2.2 F)
1997	-13.4 C (7.9 F)
1998	-16.7 C (1.9 F)
1999	-15.0 C (5.0 F)
2000	-19.2 C (-2.6 F)
2001	-17.6 C (0.3 F)
2002	-15.6 C (3.9 F)
2003	-15.5 C (4.1 F)
2004	-13.8 C (7.2 F)
2005	-14.9 C (5.2 F)
2006	-15.9 C (3.4 F)
2007	-11.4 C (11.5 F)
2008	-13.8 C (7.2 F)
2009	-13.2 C (8.2 F)
2010	-15.5 C (4.1 F)
2011	-15.1 C (4.8 F)
2012	-16.2 C (2.8 F)
2013	-16.3 C (2.7 F)
2014	-15.1 C (4.8 F)
2015	-11.7 C (10.9 F)
2016	-13.6 C (7.5 F)
2017	-15.8 C (3.6 F)
2018	-18.1 C (-0.6 F)
2019	-17.9 C (-0.2 F)
2020	-14.5 C (5.9 F)
2021	-15.1 C (4.8 F)
2022	-17.4 C (0.7 F)
2023	-17.2 C (1.0 F)
2024	-12.9 C (8.8 F)
2025	-12.7 C (9.1 F)
2026	-15.3 C (4.5 F)

Wettest day (Rx1day)

The wettest day of the year at Tomakomai, 1951 to 2026. The record is 454.5 mm (17.9 in) in 2026, marked on the chart; the median year is 90.7 mm (3.6 in).

Wettest day (Rx1day) at Tomakomai by year
Year	Wettest day (Rx1day)
1951	108.0 mm (4.3 in)
1952	56.1 mm (2.2 in)
1953	76.8 mm (3.0 in)
1954	58.5 mm (2.3 in)
1955	109.3 mm (4.3 in)
1956	74.2 mm (2.9 in)
1957	135.3 mm (5.3 in)
1958	104.0 mm (4.1 in)
1959	97.1 mm (3.8 in)
1960	56.7 mm (2.2 in)
1961	69.8 mm (2.7 in)
1962	108.5 mm (4.3 in)
1963	48.4 mm (1.9 in)
1964	99.1 mm (3.9 in)
1965	90.4 mm (3.6 in)
1966	52.4 mm (2.1 in)
1967	65.5 mm (2.6 in)
1968	66.0 mm (2.6 in)
1969	57.0 mm (2.2 in)
1970	91.0 mm (3.6 in)
1971	92.0 mm (3.6 in)
1972	70.0 mm (2.8 in)
1973	109.0 mm (4.3 in)
1974	82.0 mm (3.2 in)
1975	112.0 mm (4.4 in)
1976	63.5 mm (2.5 in)
1977	62.5 mm (2.5 in)
1978	58.0 mm (2.3 in)
1979	108.0 mm (4.3 in)
1980	81.5 mm (3.2 in)
1981	176.0 mm (6.9 in)
1982	80.5 mm (3.2 in)
1983	98.5 mm (3.9 in)
1984	46.0 mm (1.8 in)
1985	119.0 mm (4.7 in)
1986	68.5 mm (2.7 in)
1987	195.5 mm (7.7 in)
1988	95.5 mm (3.8 in)
1989	100.5 mm (4.0 in)
1990	n/a
1991	n/a
1993	n/a
1994	119.9 mm (4.7 in)
1995	90.9 mm (3.6 in)
1996	126.0 mm (5.0 in)
1997	74.9 mm (2.9 in)
1998	103.1 mm (4.1 in)
1999	86.9 mm (3.4 in)
2000	117.9 mm (4.6 in)
2001	95.0 mm (3.7 in)
2002	74.9 mm (2.9 in)
2003	81.0 mm (3.2 in)
2004	77.5 mm (3.1 in)
2005	94.0 mm (3.7 in)
2006	63.0 mm (2.5 in)
2007	50.0 mm (2.0 in)
2008	89.9 mm (3.5 in)
2009	79.0 mm (3.1 in)
2010	149.1 mm (5.9 in)
2011	82.0 mm (3.2 in)
2012	113.8 mm (4.5 in)
2013	140.0 mm (5.5 in)
2014	153.9 mm (6.1 in)
2015	90.9 mm (3.6 in)
2016	108.0 mm (4.3 in)
2017	67.1 mm (2.6 in)
2018	83.1 mm (3.3 in)
2019	116.1 mm (4.6 in)
2020	61.0 mm (2.4 in)
2021	90.9 mm (3.6 in)
2022	135.9 mm (5.4 in)
2023	132.1 mm (5.2 in)
2024	72.9 mm (2.9 in)
2025	10.0 mm (0.4 in)
2026	454.5 mm (17.9 in)

Wettest five days (Rx5day)

The wettest five days of the year at Tomakomai, 1951 to 2026. The record is 1,071.5 mm (42.2 in) in 2026, marked on the chart; the median year is 127.5 mm (5.0 in).

Wettest five days (Rx5day) at Tomakomai by year
Year	Wettest five days (Rx5day)
1951	123.4 mm (4.9 in)
1952	90.2 mm (3.6 in)
1953	121.2 mm (4.8 in)
1954	102.8 mm (4.0 in)
1955	147.7 mm (5.8 in)
1956	115.8 mm (4.6 in)
1957	155.9 mm (6.1 in)
1958	154.1 mm (6.1 in)
1959	137.6 mm (5.4 in)
1960	144.6 mm (5.7 in)
1961	111.7 mm (4.4 in)
1962	186.0 mm (7.3 in)
1963	108.9 mm (4.3 in)
1964	120.4 mm (4.7 in)
1965	201.6 mm (7.9 in)
1966	139.5 mm (5.5 in)
1967	150.8 mm (5.9 in)
1968	121.0 mm (4.8 in)
1969	72.0 mm (2.8 in)
1970	107.5 mm (4.2 in)
1971	167.5 mm (6.6 in)
1972	128.5 mm (5.1 in)
1973	181.0 mm (7.1 in)
1974	122.0 mm (4.8 in)
1975	248.0 mm (9.8 in)
1976	97.5 mm (3.8 in)
1977	161.5 mm (6.4 in)
1978	93.0 mm (3.7 in)
1979	227.5 mm (9.0 in)
1980	187.5 mm (7.4 in)
1981	394.5 mm (15.5 in)
1982	133.0 mm (5.2 in)
1983	121.5 mm (4.8 in)
1984	61.0 mm (2.4 in)
1985	126.5 mm (5.0 in)
1986	89.0 mm (3.5 in)
1987	278.0 mm (10.9 in)
1988	117.0 mm (4.6 in)
1989	159.5 mm (6.3 in)
1990	n/a
1991	n/a
1993	n/a
1994	166.3 mm (6.5 in)
1995	167.8 mm (6.6 in)
1996	31.3 mm (1.2 in)
1997	101.6 mm (4.0 in)
1998	n/a
1999	140.7 mm (5.5 in)
2000	35.2 mm (1.4 in)
2001	138.7 mm (5.5 in)
2002	57.7 mm (2.3 in)
2003	122.7 mm (4.8 in)
2004	97.8 mm (3.9 in)
2005	42.6 mm (1.7 in)
2006	142.2 mm (5.6 in)
2007	35.5 mm (1.4 in)
2008	96.5 mm (3.8 in)
2009	154.4 mm (6.1 in)
2010	190.2 mm (7.5 in)
2011	109.8 mm (4.3 in)
2012	158.3 mm (6.2 in)
2013	237.0 mm (9.3 in)
2014	298.9 mm (11.8 in)
2015	98.0 mm (3.9 in)
2016	182.4 mm (7.2 in)
2017	94.5 mm (3.7 in)
2018	126.5 mm (5.0 in)
2019	185.1 mm (7.3 in)
2020	71.6 mm (2.8 in)
2021	98.5 mm (3.9 in)
2022	173.2 mm (6.8 in)
2023	157.5 mm (6.2 in)
2024	127.5 mm (5.0 in)
2025	18.5 mm (0.7 in)
2026	1,071.5 mm (42.2 in)

Longest dry spell (CDD)

The longest dry spell of the year at Tomakomai, 1951 to 2026. The record is 39 days in 1967, marked on the chart; the median year is 17 days.

Longest dry spell (CDD) at Tomakomai by year
Year	Longest dry spell (CDD)
1951	18 days
1952	17 days
1953	12 days
1954	23 days
1955	9 days
1956	24 days
1957	22 days
1958	15 days
1959	15 days
1960	12 days
1961	16 days
1962	17 days
1963	17 days
1964	19 days
1965	13 days
1966	13 days
1967	39 days
1968	17 days
1969	18 days
1970	15 days
1971	17 days
1972	19 days
1973	13 days
1974	18 days
1975	17 days
1976	19 days
1977	15 days
1978	25 days
1979	18 days
1980	18 days
1981	18 days
1982	22 days
1983	17 days
1984	18 days
1985	15 days
1986	21 days
1987	17 days
1988	20 days
1989	17 days
1990	n/a
1991	n/a
1993	n/a
1994	1 day
1995	1 day
1996	2 days
1997	1 day
1998	2 days
1999	11 days
2000	n/a
2001	n/a
2002	3 days
2003	11 days
2004	11 days
2005	3 days
2006	3 days
2007	3 days
2008	17 days
2009	14 days
2010	14 days
2011	24 days
2012	19 days
2013	13 days
2014	22 days
2015	12 days
2016	19 days
2017	28 days
2018	20 days
2019	19 days
2020	17 days
2021	11 days
2022	10 days
2023	12 days
2024	20 days
2025	9 days
2026	14 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

40 years with a frost

Across 40 years with a frost, the median last spring frost at Tomakomai falls on 29 April and the median first autumn frost on 25 October, which leaves a median of 178 days between them.

Fitted over all years, the growing season changes by +4.4 days per decade at this station.

Frost dates and growing season at Tomakomai
Measure	Median, all years	Earliest period	Recent period (1961 to 2025)	Recent against earliest	Fitted trend
Last spring frost	29 April	n/a	27 April	n/a	-4.0 days per decade
First autumn frost	25 October	n/a	24 October	n/a	+0.4 days per decade
Growing days	178 days	n/a	183 days	n/a	+4.4 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

52 years, 1951 to 2022

A day with at least 87.8 mm (3.5 in) of rain is expected about once in 2 years. A day with at least 197.2 mm (7.8 in) of rain is expected about once in 100 years.

Rainfall return levels at Tomakomai: the daily rain expected about once in a given number of years
Expected about once in	A day with at least	Note
2 years	87.8 mm (3.5 in)
5 years	116.8 mm (4.6 in)
10 years	136.2 mm (5.4 in)
25 years	160.7 mm (6.3 in)
50 years	179.0 mm (7.0 in)
100 years	197.2 mm (7.8 in)	Longer than the 52 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, 52 years of values from 1951 to 2022.

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: 195.5 mm (7.7 in) in 1987; 176.0 mm (6.9 in) in 1981; 153.9 mm (6.1 in) in 2014.

Station Changes

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

Download the Data

Data for Tomakomai standing records by year: CSV or JSON. Field meanings are on the data page.
Data for Tomakomai 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 2026-10-15 (15 October 2026). Records are computed by this site and are not official.

Data as of 2026-10-15. Last revised 15 October 2026 (2026-10-15).