Toyohashi climate

Name: Toyohashi
Address: JP

Toyohashi is warmest in August, with average highs of 30 °C, and coldest in January, when nights average 1.6 °C. June is the wettest month (252 mm) and January the driest (65 mm). Figures are 1991–2020 climate normals.

Across a full year Toyohashi averages 1,881 mm of rain, 106 days above 25 °C and 19 days below freezing.

Japan · population 377,453 · 1991–2020 normals

Temperature below 0 °C to above 30 °C Rain band height is that month’s share of the wettest month

Warmest month August 30 °C
Coldest month January 1.6 °C
Driest month January 65 mm
Wettest month June 252 mm
Least cloud December 36 % cloud
Hottest on record August 38 °C
Coldest on record February -5.0 °C
Warmest sea August 27 °C

What to expectToyohashi through the year

Toyohashi has a clear annual cycle: average daily highs run from 8.9 °C in January to 30 °C in August, a swing of 22 °C in mean temperature across the year.

Counted across a normal year, 106 days a year reach 25 °C, 30 of them reach 30 °C, 19 nights drop below freezing. The warmest reading in the 1991–2020 record is 38 °C, in August.

Rain is strongly seasonal. June averages 252 mm against 65 mm in January — 3.9 times as much. Planning around the dry months matters more here than planning around temperature.

The sea off Toyohashi is warmest in August at 27 °C and coldest in February at 16 °C. Sea temperature lags the air by a month or two, which is why late summer swims warmer than early summer at the same air temperature.

Month by month

Month	Avg high	Rainfall	Cloud
January	8.9 °C	65 mm	38 %
February	10.0 °C	85 mm	44 %
March	13.4 °C	136 mm	51 %
April	18.1 °C	153 mm	56 %
May	22.3 °C	174 mm	66 %
June	25.2 °C	252 mm	78 %
July	28.8 °C	243 mm	72 %
August	30.2 °C	144 mm	60 %
September	27.0 °C	242 mm	62 %
October	21.8 °C	209 mm	55 %
November	16.5 °C	112 mm	45 %
December	11.2 °C	67 mm	36 %

Temperature month by month

Month	Avg high	Avg low	Mean	Record high	Record low	Days above 25 °C	Days above 30 °C	Days below 0 °C
January	8.9 °C	1.6 °C	4.7 °C	16.6 °C	-3.9 °C	0	0	8
February	10.0 °C	1.9 °C	5.5 °C	19.2 °C	-5.0 °C	0	0	8
March	13.4 °C	4.7 °C	8.7 °C	22.0 °C	-1.4 °C	0	0	2
April	18.1 °C	9.5 °C	13.6 °C	26.8 °C	0.5 °C	0	0	0
May	22.3 °C	14.2 °C	18.1 °C	31.0 °C	5.4 °C	4	0	0
June	25.2 °C	18.6 °C	21.7 °C	32.9 °C	11.9 °C	16	1	0
July	28.8 °C	22.7 °C	25.5 °C	35.6 °C	17.0 °C	29	10	0
August	30.2 °C	23.8 °C	26.6 °C	37.6 °C	18.2 °C	30	16	0
September	27.0 °C	20.5 °C	23.4 °C	35.7 °C	11.3 °C	23	3	0
October	21.8 °C	14.8 °C	18.0 °C	30.2 °C	5.8 °C	4	0	0
November	16.5 °C	9.0 °C	12.4 °C	25.9 °C	0.9 °C	0	0	0
December	11.2 °C	3.8 °C	7.1 °C	21.6 °C	-4.0 °C	0	0	2

Rain, sun and wind month by month

Month	Rainfall	Wet days	Daylight	Cloud cover	Humidity	Wind	Sea temp
January	65 mm	6	10 h/day	38 %	68 %	25 km/h	16.1 °C
February	85 mm	7	11 h/day	44 %	66 %	25 km/h	15.5 °C
March	136 mm	10	12 h/day	51 %	68 %	25 km/h	15.6 °C
April	153 mm	11	13 h/day	56 %	71 %	23 km/h	17.1 °C
May	174 mm	11	14 h/day	66 %	76 %	21 km/h	19.2 °C
June	252 mm	15	14 h/day	78 %	82 %	19 km/h	21.9 °C
July	243 mm	15	14 h/day	72 %	84 %	18 km/h	24.9 °C
August	144 mm	15	13 h/day	60 %	81 %	18 km/h	26.7 °C
September	242 mm	15	12 h/day	62 %	80 %	18 km/h	25.7 °C
October	209 mm	11	11 h/day	55 %	78 %	18 km/h	23.2 °C
November	112 mm	8	10 h/day	45 %	75 %	20 km/h	20.8 °C
December	67 mm	6	9.8 h/day	36 %	71 %	24 km/h	18.4 °C

How Toyohashi compares

The same four figures for nearby destinations, so the numbers above have something to be read against. Summer high is the warmest month's average high; winter low is the coldest month's average low.

Destination	Summer high	Winter low	Rain per year	Days above 25 °C
Toyohashi	30 °C	1.6 °C	1,881 mm	106
Nishio · Japan	30 °C	1.4 °C	1,497 mm	102
Hamamatsu · Japan	30 °C	1.9 °C	2,016 mm	105
Anjō · Japan	31 °C	-0.08 °C	1,493 mm	111
Toyota · Japan	31 °C	0.03 °C	1,878 mm	115
Nagoya · Japan	31 °C	-0.6 °C	1,519 mm	113

Planning a trip? See the best time to visit Toyohashi.

QuestionsCommon questions about Toyohashi’s climate

When is the best time to visit Toyohashi?

That depends on what you want, so the honest answer is a comparison rather than a single month. May, June, October sit closest to 20 °C on average, August is the warmest month and January the driest. The month-by-month table above has the full picture.

How hot does Toyohashi get?

In August, the warmest month, daily highs average 30 °C. About 30 days a year pass 30 °C. The highest value in the 1991–2020 record is 38 °C.

How cold does it get in winter?

Nights average 1.6 °C in January, the coldest month. A normal year has 19 nights below freezing.

Which month is wettest in Toyohashi?

June, averaging 252 mm over 15 days with rain. The driest month is January with 65 mm. The year as a whole averages 1,881 mm.

Are these figures a forecast?

No. They are 1991–2020 climate normals: the average of thirty years, which describes what a month is usually like in Toyohashi rather than what any particular week will bring. Individual years can differ substantially from the normal.

Data sources and method

ERA5 / ERA5-Land reanalysis — Copernicus Climate Change Service (C3S), ECMWF. Copernicus Licence
Open-Meteo — Open-Meteo.com. CC BY 4.0
NOAA OISST v2.1 — NOAA Physical Sciences Laboratory. Public domain
GeoNames — GeoNames.org. CC BY 4.0

Normal period: 1991–2020
Data point: 34.767°, 137.383° (the coordinates the reanalysis values are taken for)
Dataset version: era5-1991-2020-scores1.1
Last processed: 1 August 2026

Measured values come from ERA5 reanalysis and are reproduced unchanged. Calculated by us: monthly rankings, daylight hours, beach and comfort scores. Full formulas are on the methodology page.

Contains modified Copernicus Climate Change Service information 2026. Neither the European Commission nor ECMWF is responsible for any use that may be made of the Copernicus information or data it contains.