Tonami climate — normals and trends

Q: What is the climate of Tonami?

Tonami has a hot-summer humid continental climate (Köppen Dfa). Over 1940-2025, the average annual temperature is 11.0 °C and it receives 2,784 mm of precipitation per year.

Q: What is the hottest day ever recorded in Tonami?

The hottest day measured in Tonami between 1940 and 2025 was 10 August 2023, reaching 36.1 °C.

Q: What is the coldest day in Tonami?

The coldest day measured in Tonami between 1940 and 2025 was 6 January 1965, at -17.0 °C.

Q: Does it snow in Tonami?

Yes. Tonami gets on average 351.6 cm of snow per year and has around 112 frost days.

Q: Has the climate of Tonami warmed?

Yes: Tonami warmed by +2.8 °C between 1940 and 2025, a statistically significant trend.

Q: What is the wettest day in Tonami?

The wettest day measured in Tonami between 1940 and 2025 was 13 July 1972, with 197 mm of rain in 24 hours.

Q: What was the windiest day in Tonami?

The windiest day measured in Tonami between 1940 and 2025 was 4 September 2018, with winds reaching 50.3 km/h.

Q: What is the warmest month in Tonami?

The warmest month in Tonami is August (24.0 °C on average); the coldest is January (-1.4 °C).

Q: How much does it rain in Tonami?

Tonami receives on average 2,784 mm of precipitation per year, spread over about 237 rainy days.

Q: Is it sunny in Tonami?

Tonami gets on average 8.6 hours of sunshine per day, roughly 3,139 hours per year over 1940-2025.

Tonami (Japan) has a hot-summer humid continental climate (Dfa) under the Köppen-Geiger classification. Its mean annual temperature is 11.0 °C and it receives 2,784 mm of precipitation per year.

These figures are normals computed over 86 complete calendar years, from 1940 to 2025, using ERA5 reanalysis data from the Copernicus programme.

The warmest month is August (24.0 °C on average) and the coldest is January (-1.4 °C). Rainfall peaks in July.

Tonami averages 112 frost days, 19 hot days (≥ 30 °C) and 237 rainy days per year.

Tonami has warmed by +2.8 °C between 1940 and 2025, or +0.33 °C per decade. This trend is statistically significant.

The number of frost days there went from about 132 to 92 per year over the period.

The hottest day of the period reached 36.1 °C (on 10 August 2023) and the coldest -17.0 °C (on 6 January 1965).

Data from ERA5 reanalysis (Copernicus Climate Change Service), redistributed under a CC-BY 4.0 licence. Normals are recomputed whenever the archive is updated.

Climate normals · ERA5

TonamiToyama

coords: 36.62°, 136.94°
period: 1940–2025 · 86 yrs

DfaHot-summer humid continentalWarmest monthAugustColdest monthJanuaryWettest monthJulyDriest monthApril

Mean daily temperature

11.0°C

Average daily high

15.5°C

Average daily low

6.7°C

Annual rainfall

2,784mm

Sunshine / day

8.6h

Mean relative humidity

81%

Average peak wind

10.8km/h

Seasonal range

25.4°C

Frost days (< 0 °C)

112 d/yr

Hot days (≥ 30 °C)

19 d/yr

Rainy days (≥ 1 mm)

237 d/yr

Annual snowfall

351.6 cm

Average feels-like high

15.3 °C

Average feels-like low

5.2 °C

Average peak gust

36.3 km/h

Tropical nights (≥ 20 °C)

37 d/yr

Solar radiation

14.4 MJ/m²

Has the climate changed?

One stripe per year, 1940 to 2025

+2.8 °C

since 1940

+0.3 °C per decade · r² = 0.65 · p = < 0.001

19402025

Trend fitted by linear regression (ordinary least squares) on annual means. A trend is shown only when it is statistically significant (p < 0.05).

A climograph overlays rainfall (bars) and temperature (line): the standard reading in climatology, where you can see at a glance whether the warm season is also the dry one.

Records for the period

Hottest day

36.1 °C

10 August 2023

Coldest day

-17.0 °C

6 January 1965

Wettest day

197 mm

13 July 1972

Windiest day

50.3 km/h

4 September 2018

Strongest gust

173.5 km/h

4 September 2018

Hottest feels-like

41.3 °C

1 August 2022

Coldest feels-like

-22.1 °C

6 January 1965

Snowiest day

31.4 cm

31 January 1970

Sunniest day

14.0 h

27 May 1940

Year	Hottest day	Coldest day	Annual mean	Rainfall	Hot days	Frost days
2025	34.7 °C4 August 2025	-8.4 °C12 February 2025	12.8 °C	2,710 mm	58	99
2024	34.6 °C23 July 2024	-12.6 °C14 January 2024	13.2 °C	3,124 mm	46	94
2023	36.1 °C10 August 2023	-10.5 °C26 January 2023	13.2 °C	2,718 mm	54	85
2022	34.1 °C28 June 2022	-9.3 °C2 January 2022	12.4 °C	2,951 mm	32	95
2021	33.1 °C5 August 2021	-10.2 °C27 December 2021	12.6 °C	3,120 mm	22	84
2020	34.9 °C10 August 2020	-10.5 °C21 December 2020	12.8 °C	3,031 mm	32	66
2019	33.5 °C7 August 2019	-11.1 °C10 January 2019	12.5 °C	2,690 mm	35	93
2018	35.5 °C5 August 2018	-10.2 °C14 January 2018	12.5 °C	2,790 mm	40	90
2017	33.3 °C11 July 2017	-9.5 °C26 January 2017	11.5 °C	2,879 mm	17	111
2016	32.6 °C2 July 2016	-14.7 °C8 February 2016	12.7 °C	2,549 mm	22	91
2015	34.1 °C26 July 2015	-7.7 °C2 January 2015	12.4 °C	2,792 mm	22	89
2014	33.8 °C26 July 2014	-12.4 °C12 February 2014	11.3 °C	2,957 mm	12	100
2013	32.8 °C19 August 2013	-11.7 °C5 January 2013	11.7 °C	2,842 mm	22	110
2012	33.3 °C16 July 2012	-10.6 °C18 January 2012	11.3 °C	2,688 mm	30	112
2011	33.0 °C10 August 2011	-10.5 °C31 January 2011	11.5 °C	2,645 mm	26	118
2010	34.1 °C24 August 2010	-11.2 °C18 January 2010	12.2 °C	2,965 mm	47	93
2009	32.2 °C20 August 2009	-9.8 °C14 January 2009	11.9 °C	2,695 mm	5	94
2008	32.9 °C3 August 2008	-14.6 °C28 January 2008	11.8 °C	2,422 mm	15	98
2007	33.5 °C14 August 2007	-11.7 °C5 February 2007	12.0 °C	2,416 mm	25	97
2006	34.4 °C17 August 2006	-9.9 °C4 March 2006	11.8 °C	2,628 mm	29	102
2005	32.6 °C2 August 2005	-11.4 °C27 February 2005	11.6 °C	2,507 mm	22	113
2004	34.1 °C8 July 2004	-8.6 °C10 February 2004	12.6 °C	2,963 mm	32	90
2003	32.5 °C3 August 2003	-10.2 °C9 January 2003	11.5 °C	2,761 mm	12	104
2002	33.5 °C26 July 2002	-9.6 °C14 December 2002	11.6 °C	2,745 mm	26	105
2001	32.5 °C5 July 2001	-9.9 °C12 March 2001	11.4 °C	2,579 mm	18	105
2000	33.1 °C23 July 2000	-13.8 °C28 January 2000	11.5 °C	2,751 mm	34	110
1999	34.5 °C7 August 1999	-11.0 °C4 February 1999	11.7 °C	2,849 mm	27	104
1998	33.1 °C3 July 1998	-9.2 °C30 January 1998	12.4 °C	3,263 mm	10	100
1997	33.4 °C11 August 1997	-12.4 °C14 December 1997	11.2 °C	2,911 mm	14	110
1996	33.2 °C18 July 1996	-10.2 °C20 February 1996	10.5 °C	2,583 mm	16	125
1995	34.0 °C24 July 1995	-11.3 °C17 January 1995	10.7 °C	2,757 mm	25	120
1994	34.6 °C14 August 1994	-10.7 °C17 December 1994	12.2 °C	1,937 mm	44	115
1993	31.2 °C29 July 1993	-10.9 °C23 January 1993	10.9 °C	3,166 mm	6	110
1992	32.9 °C30 July 1992	-9.4 °C16 January 1992	11.4 °C	2,462 mm	23	93
1991	32.8 °C23 July 1991	-9.1 °C24 January 1991	11.8 °C	3,215 mm	13	94
1990	32.8 °C16 August 1990	-9.7 °C5 January 1990	12.4 °C	2,534 mm	29	90
1989	33.3 °C27 July 1989	-8.3 °C2 December 1989	11.7 °C	3,085 mm	14	95
1988	31.4 °C22 August 1988	-10.7 °C22 February 1988	10.4 °C	3,020 mm	8	125
1987	32.8 °C23 July 1987	-12.9 °C22 January 1987	11.6 °C	2,373 mm	14	105
1986	32.6 °C30 July 1986	-11.0 °C13 January 1986	10.5 °C	2,209 mm	19	121
1985	32.6 °C14 August 1985	-11.8 °C13 December 1985	11.1 °C	2,922 mm	36	113
1984	32.5 °C12 August 1984	-11.8 °C8 January 1984	10.3 °C	2,255 mm	25	130
1983	33.3 °C29 August 1983	-11.5 °C27 December 1983	11.0 °C	3,136 mm	18	116
1982	30.8 °C28 August 1982	-11.9 °C8 January 1982	11.1 °C	2,648 mm	2	110
1981	32.0 °C31 August 1981	-10.1 °C4 December 1981	10.3 °C	2,805 mm	18	119
1980	31.3 °C21 July 1980	-12.2 °C6 January 1980	10.7 °C	3,214 mm	4	113
1979	33.1 °C17 August 1979	-10.8 °C20 January 1979	11.6 °C	3,199 mm	12	109
1978	32.9 °C7 July 1978	-11.7 °C17 February 1978	11.3 °C	2,636 mm	36	114
1977	33.2 °C4 August 1977	-11.3 °C23 December 1977	11.2 °C	2,558 mm	14	101
1976	32.0 °C25 July 1976	-10.9 °C16 January 1976	10.4 °C	3,671 mm	12	118
1975	33.8 °C5 August 1975	-12.2 °C18 February 1975	11.0 °C	3,137 mm	22	117
1974	31.4 °C30 July 1974	-10.0 °C4 February 1974	10.3 °C	2,948 mm	11	125
1973	31.7 °C21 August 1973	-10.5 °C25 December 1973	10.8 °C	2,626 mm	25	117
1972	32.6 °C18 August 1972	-11.2 °C20 December 1972	11.3 °C	3,836 mm	18	106
1971	33.2 °C8 July 1971	-13.5 °C2 February 1971	10.4 °C	3,312 mm	17	117
1970	31.7 °C24 July 1970	-10.6 °C28 December 1970	10.3 °C	2,943 mm	15	133
1969	31.0 °C13 August 1969	-11.2 °C20 December 1969	10.4 °C	3,167 mm	13	123
1968	32.1 °C27 July 1968	-9.7 °C12 January 1968	10.7 °C	2,946 mm	13	109
1967	32.3 °C10 August 1967	-13.3 °C31 December 1967	10.7 °C	2,749 mm	14	125
1966	30.3 °C24 July 1966	-11.7 °C22 January 1966	9.9 °C	2,977 mm	8	134
1965	31.7 °C6 August 1965	-17.0 °C6 January 1965	9.1 °C	3,111 mm	4	139
1964	33.7 °C16 August 1964	-11.7 °C5 January 1964	11.3 °C	3,018 mm	32	116
1963	32.0 °C26 July 1963	-10.5 °C20 December 1963	10.9 °C	2,850 mm	16	120
1962	32.9 °C30 July 1962	-10.1 °C14 February 1962	11.0 °C	2,422 mm	23	118
1961	33.0 °C26 August 1961	-11.4 °C20 January 1961	11.7 °C	3,073 mm	33	113
1960	32.6 °C7 August 1960	-10.5 °C12 February 1960	11.3 °C	2,691 mm	24	115
1959	32.7 °C30 July 1959	-12.9 °C22 December 1959	11.8 °C	3,056 mm	12	99
1958	32.1 °C31 July 1958	-15.6 °C4 January 1958	11.2 °C	2,725 mm	9	113
1957	32.4 °C31 July 1957	-11.7 °C9 January 1957	10.5 °C	2,907 mm	14	107
1956	32.0 °C27 July 1956	-11.1 °C19 February 1956	10.5 °C	2,815 mm	18	129
1955	32.9 °C30 July 1955	-11.4 °C24 December 1955	11.4 °C	2,800 mm	28	105
1954	32.0 °C13 August 1954	-12.0 °C18 December 1954	11.1 °C	2,472 mm	13	102
1953	32.4 °C27 July 1953	-9.9 °C9 February 1953	10.5 °C	3,320 mm	10	119
1952	30.8 °C3 August 1952	-12.6 °C13 January 1952	9.2 °C	2,905 mm	3	131
1951	32.3 °C18 August 1951	-14.3 °C15 January 1951	9.6 °C	2,253 mm	10	133
1950	31.6 °C22 July 1950	-13.3 °C22 February 1950	10.2 °C	2,417 mm	9	127
1949	30.9 °C17 July 1949	-12.8 °C17 January 1949	9.7 °C	2,544 mm	3	144
1948	29.4 °C30 July 1948	-12.2 °C10 February 1948	10.3 °C	2,684 mm	0	121
1947	31.6 °C14 August 1947	-16.2 °C29 January 1947	8.7 °C	2,718 mm	6	157
1946	32.4 °C18 July 1946	-13.8 °C11 February 1946	10.0 °C	2,244 mm	9	131
1945	30.2 °C3 August 1945	-13.3 °C10 January 1945	9.0 °C	3,296 mm	2	134
1944	30.0 °C2 August 1944	-15.3 °C4 January 1944	9.8 °C	2,367 mm	1	133
1943	29.8 °C30 August 1943	-15.6 °C10 January 1943	9.4 °C	2,058 mm	0	141
1942	31.6 °C3 August 1942	-15.1 °C20 January 1942	9.8 °C	1,916 mm	16	135
1941	30.1 °C7 August 1941	-14.6 °C9 February 1941	9.6 °C	2,557 mm	1	135
1940	31.4 °C24 July 1940	-13.5 °C30 December 1940	9.1 °C	2,262 mm	3	136

Normals computed over complete calendar years 1940–2025.

A specific year

Pick a year and see how it compares to normal — warmer, drier or more extreme than usual?

Year

Across the whole year

Average daily high

17.5 °C

+2.0 °C

Hot days (≥ 30 °C)

58 d/yr

+39

Frost days (< 0 °C)

99 d/yr

-13

Annual rainfall

2710 mm

-74 mm

Month by month

	High	vs. normal	Precipitation	vs. normal
Jan	3.8 °C	+1.6 °C	217 mm	+2 mm
Feb	2.1 °C	-0.9 °C	219 mm	+38 mm
Mar	9.5 °C	+2.1 °C	184 mm	-9 mm
Apr	17.1 °C	+2.5 °C	164 mm	-9 mm
May	21.1 °C	+0.7 °C	169 mm	-19 mm
Jun	26.0 °C	+2.6 °C	250 mm	-32 mm
Jul	31.5 °C	+4.3 °C	73 mm	-289 mm
Aug	30.8 °C	+2.4 °C	323 mm	+71 mm
Sep	27.2 °C	+3.2 °C	366 mm	+59 mm
Oct	19.3 °C	+1.1 °C	312 mm	+98 mm
Nov	13.2 °C	+1.1 °C	159 mm	-34 mm
Dec	7.9 °C	+2.3 °C	274 mm	+49 mm

The year's extremes

Hottest day

34.7 °C

4 Aug 2025

Coldest day

-8.4 °C

12 Feb 2025

Wettest day

84.1 mm

10 Aug 2025

Windiest day

23.9 km/h

21 Mar 2025

Strongest gust

86.0 km/h

10 May 2025

Hottest feels-like

39.6 °C

20 Jul 2025

Coldest feels-like

-13.0 °C

12 Feb 2025

Snowiest day

16.7 cm

26 Dec 2025

Sunniest day

14.0 h

5 Jun 2025

What was the weather like that day?

Your birthday, a wedding, a memorable trip: discover the actual weather for any date since 1940.

Date

Frequently asked questions

What is the climate of Tonami?

Tonami has a hot-summer humid continental climate (Köppen Dfa). Over 1940-2025, the average annual temperature is 11.0 °C and it receives 2,784 mm of precipitation per year.

What is the hottest day ever recorded in Tonami?

The hottest day measured in Tonami between 1940 and 2025 was 10 August 2023, reaching 36.1 °C.

What is the coldest day in Tonami?

The coldest day measured in Tonami between 1940 and 2025 was 6 January 1965, at -17.0 °C.

Does it snow in Tonami?

Yes. Tonami gets on average 351.6 cm of snow per year and has around 112 frost days.

Has the climate of Tonami warmed?

Yes: Tonami warmed by +2.8 °C between 1940 and 2025, a statistically significant trend.

What is the wettest day in Tonami?

The wettest day measured in Tonami between 1940 and 2025 was 13 July 1972, with 197 mm of rain in 24 hours.

What was the windiest day in Tonami?

The windiest day measured in Tonami between 1940 and 2025 was 4 September 2018, with winds reaching 50.3 km/h.

What is the warmest month in Tonami?

The warmest month in Tonami is August (24.0 °C on average); the coldest is January (-1.4 °C).

How much does it rain in Tonami?

Tonami receives on average 2,784 mm of precipitation per year, spread over about 237 rainy days.

Is it sunny in Tonami?

Tonami gets on average 8.6 hours of sunshine per day, roughly 3,139 hours per year over 1940-2025.

What is the biggest single-day snowfall in Tonami?

The heaviest 24-hour snowfall measured in Tonami between 1940 and 2025 was 31 January 1970, with 31.4 cm.

Are there tropical nights in Tonami?

Yes: Tonami has on average 37 tropical nights per year (temperature staying above 20 °C), over 1940-2025.

What was the most extreme apparent temperature in Tonami?

In Tonami, between 1940 and 2025, the highest apparent temperature reached 41.3 °C on 1 August 2022, and the lowest was -22.1 °C on 6 January 1965.

Compare Tonami with another city

Pick a second city: its normals will be set against these, indicator by indicator.

Nearby cities

The climate around Tonami

Other cities — Japan

All cities in Japan →