Climate averages 1991–2020
Hamamatsu weather
in July.
A hot, very wet month: the 2nd warmest and the wettest of the year.
Long-term climate patterns, not a forecast for a particular trip.
July is a hot month in Hamamatsu: daytime highs average 28.8°C and nights cool to about 22.8°C. By daytime temperature it is the 2nd warmest of the 12 months.
Expect about 273 mm of rain on roughly 17 days, which makes July a very wet month (the wettest month of the year). Daylight, from sunrise to sunset, lasts about 14 h 14 min on an average July day.
The nearest other city in this atlas is Iwata (11 km away). In July its highs average 28.4°C, about as warm as Hamamatsu, with 273 mm of rain.
Among the 303 cities listed in Japan, Hamamatsu ranks joint 92nd of 303 for the warmest July highs and joint 255th of 303 for the driest July (rainfall, lowest first). The mean July high of those 303 cities is 27.9°C; Hamamatsu is 1.0°C warmer than that mean.
From July to August, average highs rise by 1.4°C to 30.2°C, and monthly rainfall falls from 273 mm to 157 mm.
The annual picture
July in context
Monthly rainfall
Average total · mmAverages from hourly ERA5 reanalysis data. Actual weather varies from year to year. How these numbers are calculated
Every month, side by side
Hamamatsu climate table
| Month | Average highHigh / low | Average low | Rainfall mm/month | Rain days ≥1 mm/day | Daylight hours/dayDaylight h/day |
|---|---|---|---|---|---|
| January | 9.5°C1.5°C | 1.5°C | 69 | 5.9 | 10.110 h |
| February | 10.5°C1.6°C | 1.6°C | 90 | 7.0 | 10.911 h |
| March | 13.8°C4.4°C | 4.4°C | 148 | 10.8 | 11.912 h |
| April | 18.3°C9.1°C | 9.1°C | 164 | 11.1 | 13.013 h |
| May | 22.4°C14.0°C | 14.0°C | 184 | 12.0 | 14.014 h |
| June | 25.1°C18.6°C | 18.6°C | 258 | 15.7 | 14.414 h |
| July, selected | 28.8°C22.8°C | 22.8°C | 273 | 16.9 | 14.214 h |
| August | 30.2°C24.0°C | 24.0°C | 157 | 16.2 | 13.513 h |
| September | 27.1°C20.9°C | 20.9°C | 247 | 15.8 | 12.412 h |
| October | 22.1°C15.2°C | 15.2°C | 216 | 12.5 | 11.311 h |
| November | 17.0°C9.2°C | 9.2°C | 122 | 9.2 | 10.410 h |
| December | 11.8°C3.8°C | 3.8°C | 71 | 6.6 | 9.910 h |
Rainfall is the average of the 30 separate monthly totals. A rain day is a local calendar day with at least 1 mm of precipitation. Daylight is the calculated sunrise-to-sunset length, not measured sunshine.
Compare places
July in nearby cities
- Iwata in JulyJapan · 11 kmHigh 28.4°C · Low 22.8°C · 273 mm rain
- Hamakita in JulyJapan · 12 kmHigh 28.6°C · Low 22.4°C · 273 mm rain
- Fukuroi in JulyJapan · 18 kmHigh 28.5°C · Low 22.5°C · 290 mm rain
- Kakegawa in JulyJapan · 27 kmHigh 28.3°C · Low 22.5°C · 290 mm rain
- Toyohashi in JulyJapan · 33 kmHigh 28.8°C · Low 22.5°C · 250 mm rain
- Shimada in JulyJapan · 43 kmHigh 26.8°C · Low 22.3°C · 287 mm rain
- Gamagōri in JulyJapan · 48 kmHigh 28.5°C · Low 22.7°C · 227 mm rain
- Fujieda in JulyJapan · 52 kmHigh 27.3°C · Low 22.4°C · 287 mm rain
Read the numbers correctly
Climate, not a promise.
These patterns help compare months. They cannot tell you the weather on a specific day of your trip.
Sources, method and limitsHow these numbers are made (what the highs, lows and rain days mean, the sources and the model cell used for Hamamatsu) is explained once on the Hamamatsu year overview and on the Sources, method and limits page.
Iwata and Hamakita lie in the same rainfall cell, so their rainfall figures are identical to these; temperatures differ because they come from smaller 0.1° cells.