Ichinomiya climate
Ichinomiya is warmest in August, with average highs of 30 °C, and coldest in January, when nights average -0.9 °C. July is the wettest month (278 mm) and January the driest (63 mm). Figures are 1991–2020 climate normals.
Across a full year Ichinomiya averages 1,884 mm of rain, 109 days above 25 °C and 59 days below freezing.
Japan · population 380,073 · 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 -0.9 °C
- Driest month January 63 mm
- Wettest month July 278 mm
- Least cloud December 45 % cloud
- Hottest on record August 37 °C
- Coldest on record December -7.8 °C
What to expectIchinomiya through the year
Ichinomiya has a clear annual cycle: average daily highs run from 7.8 °C in January to 30 °C in August, a swing of 23 °C in mean temperature across the year.
Counted across a normal year, 109 days a year reach 25 °C, 35 of them reach 30 °C, 59 nights drop below freezing. The warmest reading in the 1991–2020 record is 37 °C, in August.
Rain is strongly seasonal. July averages 278 mm against 63 mm in January — 4.4 times as much. Planning around the dry months matters more here than planning around temperature.
Month by month
| Month | Avg high | Rainfall | Cloud |
|---|---|---|---|
| January | 7.8 °C | 63 mm | 46 % |
| February | 8.9 °C | 73 mm | 50 % |
| March | 12.8 °C | 124 mm | 53 % |
| April | 17.9 °C | 148 mm | 57 % |
| May | 22.5 °C | 174 mm | 65 % |
| June | 25.7 °C | 230 mm | 78 % |
| July | 29.0 °C | 278 mm | 73 % |
| August | 30.4 °C | 182 mm | 62 % |
| September | 26.8 °C | 255 mm | 62 % |
| October | 21.3 °C | 195 mm | 54 % |
| November | 15.6 °C | 97 mm | 48 % |
| December | 10.2 °C | 65 mm | 45 % |
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 | 7.8 °C | -0.9 °C | 2.9 °C | 17.1 °C | -5.8 °C | 0 | 0 | 22 |
| February | 8.9 °C | -0.5 °C | 3.6 °C | 19.0 °C | -7.1 °C | 0 | 0 | 18 |
| March | 12.8 °C | 2.5 °C | 7.2 °C | 22.5 °C | -4.4 °C | 0 | 0 | 8 |
| April | 17.9 °C | 7.7 °C | 12.5 °C | 27.1 °C | -1.3 °C | 0 | 0 | 0 |
| May | 22.5 °C | 12.9 °C | 17.4 °C | 31.3 °C | 2.8 °C | 6 | 0 | 0 |
| June | 25.7 °C | 17.8 °C | 21.4 °C | 33.3 °C | 10.9 °C | 19 | 1 | 0 |
| July | 29.0 °C | 22.0 °C | 25.1 °C | 35.8 °C | 15.2 °C | 29 | 12 | 0 |
| August | 30.4 °C | 22.9 °C | 26.2 °C | 37.3 °C | 16.1 °C | 30 | 18 | 0 |
| September | 26.8 °C | 19.2 °C | 22.6 °C | 35.9 °C | 8.3 °C | 22 | 3 | 0 |
| October | 21.3 °C | 13.0 °C | 16.7 °C | 29.1 °C | 3.9 °C | 3 | 0 | 0 |
| November | 15.6 °C | 6.8 °C | 10.7 °C | 25.2 °C | -0.2 °C | 0 | 0 | 0 |
| December | 10.2 °C | 1.5 °C | 5.3 °C | 20.8 °C | -7.8 °C | 0 | 0 | 10 |
Rain, sun and wind month by month
| Month | Rainfall | Wet days | Daylight | Cloud cover | Humidity | Wind |
|---|---|---|---|---|---|---|
| January | 63 mm | 7 | 10 h/day | 46 % | 73 % | 17 km/h |
| February | 73 mm | 8 | 11 h/day | 50 % | 70 % | 18 km/h |
| March | 124 mm | 11 | 12 h/day | 53 % | 70 % | 18 km/h |
| April | 148 mm | 11 | 13 h/day | 57 % | 72 % | 18 km/h |
| May | 174 mm | 11 | 14 h/day | 65 % | 75 % | 16 km/h |
| June | 230 mm | 15 | 15 h/day | 78 % | 80 % | 14 km/h |
| July | 278 mm | 18 | 14 h/day | 73 % | 84 % | 13 km/h |
| August | 182 mm | 15 | 14 h/day | 62 % | 81 % | 13 km/h |
| September | 255 mm | 14 | 12 h/day | 62 % | 80 % | 13 km/h |
| October | 195 mm | 11 | 11 h/day | 54 % | 79 % | 13 km/h |
| November | 97 mm | 8 | 10 h/day | 48 % | 77 % | 13 km/h |
| December | 65 mm | 7 | 9.8 h/day | 45 % | 75 % | 16 km/h |
How Ichinomiya 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 |
|---|---|---|---|---|
| Ichinomiya | 30 °C | -0.9 °C | 1,884 mm | 109 |
| Gifu · Japan | 30 °C | -1.1 °C | 2,248 mm | 104 |
| Nagoya · Japan | 31 °C | -0.6 °C | 1,519 mm | 113 |
| Ōgaki · Japan | 30 °C | -0.5 °C | 1,913 mm | 107 |
Planning a trip? See the best time to visit Ichinomiya.
QuestionsCommon questions about Ichinomiya’s climate
When is the best time to visit Ichinomiya?
That depends on what you want, so the honest answer is a comparison rather than a single month. May, June, September 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 Ichinomiya get?
In August, the warmest month, daily highs average 30 °C. About 35 days a year pass 30 °C. The highest value in the 1991–2020 record is 37 °C.
How cold does it get in winter?
Nights average -0.9 °C in January, the coldest month. A normal year has 59 nights below freezing.
Which month is wettest in Ichinomiya?
July, averaging 278 mm over 18 days with rain. The driest month is January with 63 mm. The year as a whole averages 1,884 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 Ichinomiya 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
- Dataset version
- era5-1991-2020-scores1.1
- Last processed
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.