Koshu, Yamanashi Climate
Japan
Pop. 31,526 Elev. 635 m / 2,083 ft
TZ: Asia/Tokyo (UTC+9) ·
Koshu has mild summers with average highs of 83°F (28°C) in August, and frigid winters averaging 20°F (-7°C) in February. Humidity pushes the summer feels-like temperature to around 90°F (32°C). Rain falls on about 86 days per year (53.6 in / 1361 mm total), with snow on 9 days and 59 in (1497 mm) of annual accumulation. The city averages 114 sunny days per year and around 39 thunderstorm days. Ocean water temperatures reach 82°F (28°C) in summer.
| Temperature | 28°C (83°F) high | -7°C (20°F) low |
| Feels like | 32°C (90°F) high | -10°C (14°F) low |
| Rain | 86 days | 1361 mm (53.6 in) /yr |
| Snow | 9 days | 1497 mm (58.9 in) /yr |
| Sky | 114 sunny | 39 stormy |
| Wind | 0.8 m/s (1.8 mph) avg |
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Explore on the MapMonthly Climate Chart
Best months to visit: Aug
Sky & Air by Month
Cloud cover (%)
31
Jan 33
Feb 63
Mar 58
Apr 82
May 77
Jun 71
Jul 72
Aug 73
Sep 78
Oct 45
Nov 35
Dec Humidity (%)
55
Jan 45
Feb 66
Mar 61
Apr 72
May 75
Jun 80
Jul 79
Aug 80
Sep 84
Oct 70
Nov 66
Dec Weather Days by Month
Water Temperatures
Cities with Similar Climate
Find similar cities on the map →Nearby Cities
Nearby
Commercial airport 90 km Shinshu-Matsumoto Airport (MMJ)
Ski resort 16 km カムイみさかスキー場
National park 191 km 高鈴県立自然公園
Mountain peak
(1,600 m) 6 km 鈴庫山
Hospital 5 km 山梨厚生会塩山市民病院
Hiking trail 6 km 大菩薩山 ループ
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Monthly Weather Data
↑ See chart| Month | Avg High | Avg Low | Rainfall | Snowfall | Sunny Days |
|---|---|---|---|---|---|
| January | 5°C 40°F | -5°C 23°F | 21 mm 0.8 in | 88 mm3.5 in | 22 |
| February | 4°C 39°F | -7°C 20°F | 6 mm 0.2 in | 141 mm5.5 in | 19 |
| March | 9°C 48°F | -1°C 30°F | 77 mm 3.0 in | 1075 mm42.3 in | 10 |
| April | 15°C 60°F | 5°C 40°F | 93 mm 3.7 in | 137 mm5.4 in | 9 |
| May | 19°C 66°F | 10°C 50°F | 178 mm 7.0 in | — | 1 |
| June | 25°C 76°F | 16°C 61°F | 168 mm 6.6 in | — | 3 |
| July | 27°C 81°F | 19°C 66°F | 237 mm 9.3 in | — | 3 |
| August | 28°C 83°F | 20°C 67°F | 140 mm 5.5 in | — | 3 |
| September | 25°C 76°F | 17°C 62°F | 211 mm 8.3 in | — | 4 |
| October | 17°C 62°F | 10°C 50°F | 152 mm 6.0 in | — | 3 |
| November | 12°C 53°F | 1°C 34°F | 25 mm 1.0 in | 5 mm0.2 in | 16 |
| December | 7°C 44°F | -3°C 27°F | 52 mm 2.1 in | 50 mm2.0 in | 21 |
Weather Days by Month
↑ See chart| Month | Sunny Days | Storm Days |
|---|---|---|
| January | 22 | 0 |
| February | 19 | 0 |
| March | 10 | 0 |
| April | 9 | 2 |
| May | 1 | 2 |
| June | 3 | 5 |
| July | 3 | 15 |
| August | 3 | 6 |
| September | 4 | 6 |
| October | 3 | 2 |
| November | 16 | 0 |
| December | 21 | 1 |
Water Temperatures Data
↑ See chart| Month | Ocean Avg High | Lake Avg High |
|---|---|---|
| January | 16°C 61°F | 4°C 39°F |
| February | 15°C 59°F | 3°C 38°F |
| March | 15°C 60°F | 5°C 42°F |
| April | 17°C 63°F | 10°C 50°F |
| May | 20°C 68°F | 15°C 60°F |
| June | 25°C 77°F | 21°C 70°F |
| July | 27°C 81°F | 27°C 80°F |
| August | 28°C 82°F | 28°C 83°F |
| September | 27°C 81°F | 25°C 77°F |
| October | 24°C 76°F | 19°C 66°F |
| November | 21°C 69°F | 12°C 54°F |
| December | 19°C 67°F | 8°C 46°F |