Yamagata climate
Yamagata is warmest in August, with average highs of 27 °C, and coldest in January, when nights average -5.5 °C. July is the wettest month (187 mm) and February the driest (91 mm). Figures are 1991–2020 climate normals.
Across a full year Yamagata averages 1,438 mm of rain, 58 days above 25 °C and 114 days below freezing.
Japan · population 248,772 · 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 27 °C
- Coldest month January -5.5 °C
- Driest month February 91 mm
- Wettest month July 187 mm
- Least cloud April 66 % cloud
- Hottest on record August 37 °C
- Coldest on record January -17 °C
What to expectYamagata through the year
Yamagata has a clear annual cycle: average daily highs run from 1.2 °C in January to 27 °C in August, a swing of 25 °C in mean temperature across the year.
Counted across a normal year, 58 days a year reach 25 °C, 12 of them reach 30 °C, 114 nights drop below freezing. The warmest reading in the 1991–2020 record is 37 °C, in August.
Rain is strongly seasonal. July averages 187 mm against 91 mm in February — 2.0 times as much. Planning around the dry months matters more here than planning around temperature.
Month by month
| Month | Avg high | Rainfall | Cloud |
|---|---|---|---|
| January | 1.2 °C | 129 mm | 76 % |
| February | 2.1 °C | 91 mm | 74 % |
| March | 6.0 °C | 109 mm | 69 % |
| April | 13.3 °C | 97 mm | 66 % |
| May | 19.3 °C | 93 mm | 70 % |
| June | 22.6 °C | 121 mm | 79 % |
| July | 25.7 °C | 187 mm | 82 % |
| August | 27.0 °C | 146 mm | 76 % |
| September | 22.9 °C | 129 mm | 76 % |
| October | 17.0 °C | 120 mm | 70 % |
| November | 10.7 °C | 96 mm | 69 % |
| December | 4.3 °C | 121 mm | 75 % |
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 | 1.2 °C | -5.5 °C | -2.3 °C | 10.8 °C | -17.1 °C | 0 | 0 | 29 |
| February | 2.1 °C | -5.0 °C | -1.7 °C | 14.0 °C | -14.8 °C | 0 | 0 | 26 |
| March | 6.0 °C | -2.1 °C | 1.5 °C | 19.6 °C | -15.6 °C | 0 | 0 | 23 |
| April | 13.3 °C | 3.3 °C | 7.8 °C | 25.2 °C | -7.6 °C | 0 | 0 | 6 |
| May | 19.3 °C | 9.4 °C | 14.0 °C | 32.0 °C | -0.7 °C | 2 | 0 | 0 |
| June | 22.6 °C | 14.4 °C | 18.1 °C | 34.8 °C | 6.8 °C | 7 | 0 | 0 |
| July | 25.7 °C | 18.8 °C | 21.8 °C | 35.9 °C | 10.6 °C | 18 | 4 | 0 |
| August | 27.0 °C | 19.8 °C | 23.0 °C | 36.7 °C | 11.0 °C | 22 | 6 | 0 |
| September | 22.9 °C | 15.9 °C | 18.9 °C | 32.6 °C | 5.4 °C | 8 | 1 | 0 |
| October | 17.0 °C | 9.3 °C | 12.7 °C | 28.1 °C | -0.8 °C | 0 | 0 | 0 |
| November | 10.7 °C | 3.1 °C | 6.5 °C | 21.6 °C | -6.5 °C | 0 | 0 | 6 |
| December | 4.3 °C | -2.1 °C | 0.8 °C | 17.6 °C | -15.5 °C | 0 | 0 | 23 |
Rain, sun and wind month by month
| Month | Rainfall | Wet days | Daylight | Cloud cover | Humidity | Wind |
|---|---|---|---|---|---|---|
| January | 129 mm | 22 | 9.8 h/day | 76 % | 82 % | 16 km/h |
| February | 91 mm | 17 | 11 h/day | 74 % | 79 % | 17 km/h |
| March | 109 mm | 16 | 12 h/day | 69 % | 77 % | 17 km/h |
| April | 97 mm | 14 | 13 h/day | 66 % | 76 % | 16 km/h |
| May | 93 mm | 12 | 14 h/day | 70 % | 77 % | 13 km/h |
| June | 121 mm | 13 | 15 h/day | 79 % | 83 % | 11 km/h |
| July | 187 mm | 18 | 15 h/day | 82 % | 87 % | 9.6 km/h |
| August | 146 mm | 15 | 14 h/day | 76 % | 86 % | 9.6 km/h |
| September | 129 mm | 13 | 12 h/day | 76 % | 86 % | 11 km/h |
| October | 120 mm | 12 | 11 h/day | 70 % | 84 % | 12 km/h |
| November | 96 mm | 15 | 10 h/day | 69 % | 83 % | 14 km/h |
| December | 121 mm | 20 | 9.5 h/day | 75 % | 82 % | 15 km/h |
Where Yamagata ranks
| Ranking | Position | Value |
|---|---|---|
| The coolest places in Asia in June | 38th of 50 | 23 °C |
| The coolest places in Asia in May | 49th of 50 | 19 °C |
Planning a trip? See the best time to visit Yamagata.
QuestionsCommon questions about Yamagata’s climate
When is the best time to visit Yamagata?
That depends on what you want, so the honest answer is a comparison rather than a single month. June, July, September sit closest to 20 °C on average, August is the warmest month and February the driest. The month-by-month table above has the full picture.
How hot does Yamagata get?
In August, the warmest month, daily highs average 27 °C. About 12 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 -5.5 °C in January, the coldest month. A normal year has 114 nights below freezing.
Which month is wettest in Yamagata?
July, averaging 187 mm over 18 days with rain. The driest month is February with 91 mm. The year as a whole averages 1,438 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 Yamagata 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
- 38.233°, 140.367° (the coordinates the reanalysis values are taken for)
- 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.