Tsu climate
Tsu (Japan) has a humid subtropical climate (Köppen Cfa). The average temperature over the year is 16 °C60 °F, and about 1,940 mm76 in of precipitation falls in an average year.
Temperature by month
Precipitation by month
Tsu climate table
| Month | High °C°F | Low °C°F | Mean °C°F | Precip. mmin |
|---|---|---|---|---|
| Jan | 846 | 032 | 439 | 702.8 |
| Feb | 1050 | 133 | 541 | 803.2 |
| Mar | 1457 | 337 | 847 | 1254.9 |
| Apr | 1967 | 846 | 1456 | 1586.2 |
| May | 2475 | 1356 | 1966 | 1797.1 |
| Jun | 2781 | 1865 | 2373 | 2289.0 |
| Jul | 3188 | 2373 | 2781 | 2339.2 |
| Aug | 3290 | 2374 | 2882 | 2068.1 |
| Sep | 2883 | 2067 | 2475 | 26610 |
| Oct | 2272 | 1456 | 1864 | 2228.7 |
| Nov | 1762 | 846 | 1254 | 1003.9 |
| Dec | 1151 | 236 | 744 | 732.9 |
| Year | 3290 | 032 | 1660 | 1,94076 |
“Year” row: highest monthly high, lowest monthly low, annual mean and annual total.
| Month | Humid. | Cloud | Solar | Daylight |
|---|---|---|---|---|
| Jan | 85% | 69% | 2.5 | 10:04 |
| Feb | 83% | 69% | 3.2 | 10:53 |
| Mar | 81% | 67% | 4.1 | 11:52 |
| Apr | 80% | 66% | 4.9 | 13:01 |
| May | 80% | 70% | 5.2 | 13:58 |
| Jun | 84% | 81% | 4.7 | 14:28 |
| Jul | 85% | 75% | 4.9 | 14:16 |
| Aug | 84% | 64% | 5.1 | 13:27 |
| Sep | 86% | 70% | 4.0 | 12:20 |
| Oct | 87% | 67% | 3.2 | 11:14 |
| Nov | 85% | 63% | 2.7 | 10:17 |
| Dec | 86% | 65% | 2.3 | 9:50 |
Humid. = average relative humidity at 2 m; cloud = average cloud amount; solar = average daily solar energy reaching the ground in kWh/m² (all-sky); daylight in hours:minutes, calculated for the 15th of each month.
What the climate of Tsu is like
The warmest month is August, with an average high of 32 °C90 °F and a low of 23 °C74 °F. The coldest is January, when highs average 8 °C46 °F and lows 0 °C32 °F. Seasons are strongly marked: the warmest month is on average 23.6 °C42.4 °F warmer than the coldest.
It is wet, with about 1,940 mm76 in of precipitation per year. The wettest three-month stretch is July–September, which brings 36% of the annual total. The wettest month is September (266 mm10 in), the driest is January (70 mm2.8 in).
Relative humidity ranges from 80% in April to 87% in October. The clearest skies (lowest average cloud amount, 63%) are typical of November. Average wind speed near the ground ranges from 1 km/h (0 mph) in July to 2 km/h (1 mph) in March. Daylight lasts from about 9.8 hours in December to 14.5 hours in June.
Best time to visit Tsu
Based on these averages, the most comfortable months for sightseeing and outdoor activities are May and November: average highs of 17 °C62 °F to 24 °C75 °F with 100 mm3.9 in to 179 mm7.1 in of precipitation per month.
The most challenging month is July, which is hot, with average highs of 31 °C88 °F, very wet (233 mm9.2 in) and humid (85% relative humidity).
Comfort score: months are ranked by how close they come to an average high of 21–28 °C (70–82 °F), lows above 5 °C (41 °F), little precipitation and moderate humidity. The best-ranked months of each place are recommended, even where none meets all of these. These are general rules of thumb applied to long-term averages.
What to pack for Tsu
- Winter (December–February) — highs 846 to 11 °C51 °F, lows 032 to 2 °C36 °F, about 74 mm2.9 in of precipitation a month. Pack a warm coat, layers and closed shoes.
- Spring (March–May) — highs 1457 to 24 °C75 °F, lows 337 to 13 °C56 °F, about 154 mm6.1 in of precipitation a month. Pack light layers — T-shirts plus a light sweater or jacket, an extra layer for the cooler mornings and evenings and an umbrella or light rain jacket.
- Summer (June–August) — highs 2781 to 32 °C90 °F, lows 1865 to 23 °C74 °F, about 222 mm8.8 in of precipitation a month. Pack very light, breathable clothing, a sun hat and plenty of water and a good rain jacket or umbrella and quick-drying shoes.
- Autumn (September–November) — highs 1762 to 28 °C83 °F, lows 846 to 20 °C67 °F, about 196 mm7.7 in of precipitation a month. Pack light layers — T-shirts plus a light sweater or jacket and an umbrella or light rain jacket.
How Tsu compares
Compared with Yokkaichi, about 28 km to the north, Tsu has practically the same average temperature and receives 11% more precipitation (1,940 mm76 in vs 1,741 mm69 in). The difference is largest in November (0.8 °C1.4 °F cooler).
Of the 111 places in Japan covered by World Climates, Tsu is the 47th warmest by annual mean temperature and the 22nd wettest by annual precipitation. See all of them on the Japan climate page.
Places in other countries with the most similar temperature and rainfall pattern: East Hampton (United States, Cfa), Norfolk (United States, Cfa) and Virginia Beach (United States, Cfa).
The same NASA POWER grid cell also contains Matsusaka (pop. 159,145). Their long-term averages in this dataset are essentially the same as for Tsu, so they do not have separate pages.
Nearby places
- Yokkaichi 28 km · 16 °C61 °F · 1,741 mm69 in
- Ise 32 km · 17 °C62 °F · 1,879 mm74 in
- Kusatsu 59 km · 14 °C58 °F · 1,674 mm66 in
- Nagoya 61 km · 16 °C61 °F · 1,741 mm69 in
- Hikone 62 km · 14 °C58 °F · 1,865 mm73 in
- Okazaki 64 km · 16 °C60 °F · 1,741 mm69 in
- Toyota 70 km · 16 °C60 °F · 1,741 mm69 in
- Nagahama 76 km · 15 °C58 °F · 1,865 mm73 in
Frequently asked questions
What is the warmest month in Tsu?
August is the warmest month in Tsu, with an average high of 32 °C (90 °F) and an average low of 23 °C (74 °F).
What is the coldest month in Tsu?
January is the coldest month, with an average high of 8 °C (46 °F) and an average low of 0 °C (32 °F).
When does it rain the most in Tsu?
September is the wettest month with about 266 mm (10.5 in) of precipitation; January is the driest with about 70 mm (2.8 in).
What is the best time to visit Tsu?
Judging by long-term averages, the most comfortable months are May and November.
About this data
All figures are 25-year averages (January 2001 – December 2025) from the NASA POWER project. Temperature, humidity, wind and precipitation come from the MERRA-2 reanalysis (precipitation is the bias-corrected MERRA-2 product), cloud and solar values from CERES satellite data. They describe a grid cell of roughly 50–70 km, not a single weather station, so they can differ from airport records — most of all on coasts, in mountains and for rainfall. Average highs and lows are the monthly mean temperature plus/minus half of the average daily temperature range. Counts of rainy days are not part of this dataset.
The grid cell’s average elevation is 382 m, while Tsu lies at about 1 m. Temperatures on this page were therefore adjusted by +2.5 °C4.5 °F using the standard lapse rate of 6.5 °C per 1,000 m.