Kofu climate
Kofu is warmest in August, with average highs of 29 °C, and coldest in January, when nights average -2.3 °C. July is the wettest month (199 mm) and December the driest (61 mm). Figures are 1991–2020 climate normals.
Across a full year Kofu averages 1,593 mm of rain, 101 days above 25 °C and 57 days below freezing.
Japan · population 189,591 · 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 29 °C
- Coldest month January -2.3 °C
- Driest month December 61 mm
- Wettest month July 199 mm
- Least cloud December 44 % cloud
- Hottest on record July 37 °C
- Coldest on record January -18 °C
What to expectKofu through the year
Kofu has a clear annual cycle: average daily highs run from 6.9 °C in January to 29 °C in August, a swing of 23 °C in mean temperature across the year.
Counted across a normal year, 101 days a year reach 25 °C, 31 of them reach 30 °C, 57 nights drop below freezing. The warmest reading in the 1991–2020 record is 37 °C, in July.
Rain is strongly seasonal. July averages 199 mm against 61 mm in December — 3.3 times as much. Planning around the dry months matters more here than planning around temperature.
Month by month
| Month | Avg high | Rainfall | Cloud |
|---|---|---|---|
| January | 6.9 °C | 68 mm | 44 % |
| February | 7.8 °C | 81 mm | 50 % |
| March | 11.7 °C | 128 mm | 57 % |
| April | 18.0 °C | 129 mm | 62 % |
| May | 22.5 °C | 134 mm | 69 % |
| June | 25.2 °C | 187 mm | 82 % |
| July | 28.8 °C | 199 mm | 79 % |
| August | 29.5 °C | 142 mm | 71 % |
| September | 25.7 °C | 189 mm | 73 % |
| October | 20.4 °C | 188 mm | 65 % |
| November | 15.3 °C | 86 mm | 53 % |
| December | 9.9 °C | 61 mm | 44 % |
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 | 6.9 °C | -2.3 °C | 1.9 °C | 18.9 °C | -18.4 °C | 0 | 0 | 21 |
| February | 7.8 °C | -1.9 °C | 2.6 °C | 21.9 °C | -17.5 °C | 0 | 0 | 18 |
| March | 11.7 °C | 1.8 °C | 6.4 °C | 22.7 °C | -14.5 °C | 0 | 0 | 8 |
| April | 18.0 °C | 7.6 °C | 12.4 °C | 29.6 °C | -2.2 °C | 1 | 0 | 1 |
| May | 22.5 °C | 12.7 °C | 17.4 °C | 32.5 °C | 1.5 °C | 8 | 0 | 0 |
| June | 25.2 °C | 17.3 °C | 20.9 °C | 33.6 °C | 8.2 °C | 16 | 2 | 0 |
| July | 28.8 °C | 21.1 °C | 24.6 °C | 36.8 °C | 12.7 °C | 26 | 12 | 0 |
| August | 29.5 °C | 21.9 °C | 25.3 °C | 36.1 °C | 12.5 °C | 29 | 14 | 0 |
| September | 25.7 °C | 18.3 °C | 21.5 °C | 34.7 °C | 6.6 °C | 18 | 3 | 0 |
| October | 20.4 °C | 12.4 °C | 15.9 °C | 31.0 °C | 1.6 °C | 3 | 0 | 0 |
| November | 15.3 °C | 6.4 °C | 10.4 °C | 24.3 °C | -5.6 °C | 0 | 0 | 0 |
| December | 9.9 °C | 1.4 °C | 5.1 °C | 19.9 °C | -14.8 °C | 0 | 0 | 9 |
Rain, sun and wind month by month
| Month | Rainfall | Wet days | Daylight | Cloud cover | Humidity | Wind |
|---|---|---|---|---|---|---|
| January | 68 mm | 7 | 10 h/day | 44 % | 67 % | 10 km/h |
| February | 81 mm | 9 | 11 h/day | 50 % | 68 % | 11 km/h |
| March | 128 mm | 13 | 12 h/day | 57 % | 71 % | 11 km/h |
| April | 129 mm | 13 | 13 h/day | 62 % | 72 % | 11 km/h |
| May | 134 mm | 13 | 14 h/day | 69 % | 75 % | 9.2 km/h |
| June | 187 mm | 17 | 15 h/day | 82 % | 82 % | 7.7 km/h |
| July | 199 mm | 17 | 14 h/day | 79 % | 84 % | 7.5 km/h |
| August | 142 mm | 16 | 14 h/day | 71 % | 84 % | 7.2 km/h |
| September | 189 mm | 15 | 12 h/day | 73 % | 84 % | 7.5 km/h |
| October | 188 mm | 12 | 11 h/day | 65 % | 81 % | 7.6 km/h |
| November | 86 mm | 9 | 10 h/day | 53 % | 76 % | 8.5 km/h |
| December | 61 mm | 7 | 9.8 h/day | 44 % | 70 % | 10 km/h |
How Kofu 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 |
|---|---|---|---|---|
| Kofu | 29 °C | -2.3 °C | 1,593 mm | 101 |
| Fuji · Japan | 29 °C | 2.3 °C | 2,387 mm | 99 |
| Hadano · Japan | 28 °C | 1.2 °C | 1,862 mm | 82 |
| Aihara · Japan | 28 °C | -1.5 °C | 1,881 mm | 80 |
| Hachiōji · Japan | 29 °C | -1.9 °C | 1,901 mm | 85 |
| Numazu · Japan | 29 °C | 3.1 °C | 2,119 mm | 91 |
Planning a trip? See the best time to visit Kofu.
QuestionsCommon questions about Kofu’s climate
When is the best time to visit Kofu?
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 December the driest. The month-by-month table above has the full picture.
How hot does Kofu get?
In August, the warmest month, daily highs average 29 °C. About 31 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 -2.3 °C in January, the coldest month. A normal year has 57 nights below freezing.
Which month is wettest in Kofu?
July, averaging 199 mm over 17 days with rain. The driest month is December with 61 mm. The year as a whole averages 1,593 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 Kofu 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
- 35.667°, 138.567° (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.