Koga, Ibaraki Climate
Japan
Pop. 139,344 Elev. 17 m / 56 ft
TZ: Asia/Tokyo (UTC+9) ·
Koga sees warm summers peaking at 93°F (34°C) in August, and cold winters that bottom out around 30°F (-1°C) in January. Humidity pushes the summer feels-like temperature to around 115°F (46°C). Precipitation occurs on roughly 76 days per year (48.4 in / 1230 mm total), with snow on 3 days and 14 in (355 mm) of annual accumulation. The city averages 126 sunny days per year and around 25 thunderstorm days. Ocean water temperatures reach 86°F (30°C) in summer.
| Temperature | 34°C (93°F) high | -1°C (30°F) low |
| Feels like | 46°C (115°F) high | -4°C (25°F) low |
| Rain | 76 days | 1230 mm (48.4 in) /yr |
| Snow | 3 days | 355 mm (14.0 in) /yr |
| Sky | 126 sunny | 25 stormy |
| Wind | 1.0 m/s (2.3 mph) avg |
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Explore on the MapMonthly Climate Chart
Best months to visit: Apr, Nov
Sky & Air by Month
Cloud cover (%)
28
Jan 30
Feb 61
Mar 58
Apr 81
May 76
Jun 63
Jul 65
Aug 66
Sep 75
Oct 38
Nov 32
Dec Humidity (%)
61
Jan 49
Feb 63
Mar 66
Apr 72
May 76
Jun 75
Jul 70
Aug 75
Sep 77
Oct 67
Nov 65
Dec Weather Days by Month
Water Temperatures
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Nearby
Commercial airport 71 km Tokyo Haneda International Airport (HND)
Ski resort 63 km 赤城山第１スキー
National park 92 km 高鈴県立自然公園
Mountain peak
(1,556 m) 58 km 二小山
Hospital 0 km 古河赤十字病院
Hiking trail 19 km KFT - T25 - Ryousen wo tadoru michi
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Monthly Weather Data
↑ See chart| Month | Avg High | Avg Low | Rainfall | Snowfall | Sunny Days |
|---|---|---|---|---|---|
| January | 10°C 50°F | -1°C 30°F | 34 mm 1.3 in | 19 mm0.7 in | 23 |
| February | 10°C 49°F | -1°C 30°F | 5 mm 0.2 in | 10 mm0.4 in | 19 |
| March | 14°C 58°F | 4°C 39°F | 127 mm 5.0 in | 326 mm12.8 in | 10 |
| April | 20°C 67°F | 10°C 49°F | 125 mm 4.9 in | — | 9 |
| May | 22°C 72°F | 14°C 58°F | 205 mm 8.1 in | — | 3 |
| June | 28°C 83°F | 20°C 69°F | 165 mm 6.5 in | — | 4 |
| July | 32°C 90°F | 24°C 75°F | 95 mm 3.7 in | — | 8 |
| August | 34°C 93°F | 25°C 77°F | 75 mm 2.9 in | — | 5 |
| September | 30°C 85°F | 22°C 72°F | 166 mm 6.5 in | — | 3 |
| October | 21°C 70°F | 15°C 58°F | 148 mm 5.8 in | — | 3 |
| November | 16°C 61°F | 5°C 41°F | 17 mm 0.7 in | — | 16 |
| December | 11°C 52°F | 1°C 33°F | 68 mm 2.7 in | 1 mm0.0 in | 23 |
Weather Days by Month
↑ See chart| Month | Sunny Days | Storm Days |
|---|---|---|
| January | 23 | 0 |
| February | 19 | 0 |
| March | 10 | 2 |
| April | 9 | 2 |
| May | 3 | 4 |
| June | 4 | 4 |
| July | 8 | 4 |
| August | 5 | 1 |
| September | 3 | 4 |
| October | 3 | 3 |
| November | 16 | 0 |
| December | 23 | 1 |
Water Temperatures Data
↑ See chart| Month | Ocean Avg High | Lake Avg High |
|---|---|---|
| January | 12°C 54°F | 3°C 37°F |
| February | 13°C 55°F | 3°C 37°F |
| March | 14°C 58°F | 7°C 45°F |
| April | 17°C 63°F | 13°C 56°F |
| May | 20°C 69°F | 18°C 64°F |
| June | 26°C 80°F | 23°C 74°F |
| July | 29°C 84°F | 28°C 82°F |
| August | 30°C 86°F | 29°C 84°F |
| September | 29°C 85°F | 26°C 78°F |
| October | 24°C 76°F | 18°C 64°F |
| November | 19°C 66°F | 11°C 52°F |
| December | 16°C 60°F | 6°C 43°F |