Tokorozawa climate
Tokorozawa is warmest in August, with average highs of 29 °C, and coldest in January, when nights average -2.0 °C. October is the wettest month (218 mm) and December the driest (60 mm). Figures are 1991–2020 climate normals.
Across a full year Tokorozawa averages 1,616 mm of rain, 88 days above 25 °C and 63 days below freezing.
Japan · population 344,194 · 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 -2.0 °C
- Driest month December 60 mm
- Wettest month October 218 mm
- Least cloud January 39 % cloud
- Hottest on record July 39 °C
- Coldest on record January -16 °C
What to expectTokorozawa through the year
Tokorozawa has a clear annual cycle: average daily highs run from 7.4 °C in January to 29 °C in August, a swing of 23 °C in mean temperature across the year.
Counted across a normal year, 88 days a year reach 25 °C, 25 of them reach 30 °C, 63 nights drop below freezing. The warmest reading in the 1991–2020 record is 39 °C, in July.
Rain is strongly seasonal. October averages 218 mm against 60 mm in December — 3.6 times as much. Planning around the dry months matters more here than planning around temperature.
Month by month
| Month | Avg high | Rainfall | Cloud |
|---|---|---|---|
| January | 7.4 °C | 70 mm | 39 % |
| February | 8.4 °C | 69 mm | 48 % |
| March | 11.9 °C | 117 mm | 58 % |
| April | 17.1 °C | 123 mm | 62 % |
| May | 21.6 °C | 143 mm | 69 % |
| June | 24.3 °C | 182 mm | 81 % |
| July | 28.0 °C | 182 mm | 76 % |
| August | 29.2 °C | 148 mm | 67 % |
| September | 25.4 °C | 215 mm | 69 % |
| October | 19.9 °C | 218 mm | 63 % |
| November | 14.9 °C | 89 mm | 52 % |
| December | 9.9 °C | 60 mm | 41 % |
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 | 7.4 °C | -2.0 °C | 2.3 °C | 17.2 °C | -16.2 °C | 0 | 0 | 23 |
| February | 8.4 °C | -1.2 °C | 3.2 °C | 21.2 °C | -15.6 °C | 0 | 0 | 18 |
| March | 11.9 °C | 2.5 °C | 6.9 °C | 24.4 °C | -9.8 °C | 0 | 0 | 8 |
| April | 17.1 °C | 7.8 °C | 12.2 °C | 27.9 °C | -2.4 °C | 0 | 0 | 0 |
| May | 21.6 °C | 13.0 °C | 17.1 °C | 31.0 °C | 3.0 °C | 5 | 0 | 0 |
| June | 24.3 °C | 17.5 °C | 20.6 °C | 33.3 °C | 9.5 °C | 12 | 1 | 0 |
| July | 28.0 °C | 21.5 °C | 24.4 °C | 38.6 °C | 14.5 °C | 25 | 9 | 0 |
| August | 29.2 °C | 22.5 °C | 25.5 °C | 35.5 °C | 16.2 °C | 28 | 13 | 0 |
| September | 25.4 °C | 19.0 °C | 21.9 °C | 35.3 °C | 8.8 °C | 17 | 2 | 0 |
| October | 19.9 °C | 13.0 °C | 16.2 °C | 30.5 °C | 3.2 °C | 2 | 0 | 0 |
| November | 14.9 °C | 6.7 °C | 10.5 °C | 23.7 °C | -6.5 °C | 0 | 0 | 1 |
| December | 9.9 °C | 0.9 °C | 5.0 °C | 22.6 °C | -14.4 °C | 0 | 0 | 13 |
Rain, sun and wind month by month
| Month | Rainfall | Wet days | Daylight | Cloud cover | Humidity | Wind |
|---|---|---|---|---|---|---|
| January | 70 mm | 7 | 10 h/day | 39 % | 69 % | 16 km/h |
| February | 69 mm | 9 | 11 h/day | 48 % | 69 % | 17 km/h |
| March | 117 mm | 13 | 12 h/day | 58 % | 71 % | 19 km/h |
| April | 123 mm | 13 | 13 h/day | 62 % | 74 % | 20 km/h |
| May | 143 mm | 13 | 14 h/day | 69 % | 77 % | 19 km/h |
| June | 182 mm | 16 | 15 h/day | 81 % | 83 % | 16 km/h |
| July | 182 mm | 16 | 14 h/day | 76 % | 84 % | 15 km/h |
| August | 148 mm | 14 | 14 h/day | 67 % | 82 % | 15 km/h |
| September | 215 mm | 14 | 12 h/day | 69 % | 82 % | 16 km/h |
| October | 218 mm | 13 | 11 h/day | 63 % | 80 % | 15 km/h |
| November | 89 mm | 9 | 10 h/day | 52 % | 77 % | 14 km/h |
| December | 60 mm | 7 | 9.8 h/day | 41 % | 72 % | 15 km/h |
Planning a trip? See the best time to visit Tokorozawa.
QuestionsCommon questions about Tokorozawa’s climate
When is the best time to visit Tokorozawa?
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 Tokorozawa get?
In August, the warmest month, daily highs average 29 °C. About 25 days a year pass 30 °C. The highest value in the 1991–2020 record is 39 °C.
How cold does it get in winter?
Nights average -2.0 °C in January, the coldest month. A normal year has 63 nights below freezing.
Which month is wettest in Tokorozawa?
October, averaging 218 mm over 13 days with rain. The driest month is December with 60 mm. The year as a whole averages 1,616 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 Tokorozawa 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
- 35.799°, 139.469° (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.