Kamakura records about 1600mm of rain across roughly 120 wet days a year, which is a 33% chance on an average day. September is the wettest month at 210mm (13% of the annual total) and December the driest at 50mm. Local rain type: steady rain. Kamakura's hydrangea season (June) is also peak rainy season — embrace the rain with a clear umbrella for atmospheric temple photography. Autumn and winter are drier and crisp.
Chance of rain on an average day: 33%
Rainfall climatology for Kamakura. The live hour-by-hour answer for today loads at the top of this page from Open-Meteo and refreshes through the day — the figures below describe a typical year, not today.
Last updated: · Live forecast data refreshes hourly.
| Annual rainfall | 1600mm |
| Rain days per year | 120 |
| Odds on an average day | 33% |
| Wettest month | September — 210mm over 16 days |
| Driest month | December — 50mm over 4 days |
| Rain type | steady rain |
| Best dry window | November through February is cold but crisp with clear Pacific Ocean views from the clifftop trails. |
| Worst rain window | June and September bring the most rain — tsuyu in early summer and typhoon season in autumn. |
September delivers 320% more rain than December (210mm vs 50mm). That gap is the difference between planning around showers and ignoring them.
No single month holds more than 13% of the annual total, so rain in Kamakura is spread through the year — there is no season you can rely on being dry.
Kamakura rain typically comes as discrete showers, so a compact umbrella and a flexible plan are usually enough.
Rain falls on about 16 days in September against 4 in December — the frequency swing matters more for planning than the millimetre totals.
Climate normals. Use them to judge whether today's live forecast at the top of the page is typical or unusual for the season.
| Month | Rainfall | Rain days | Chance on a given day | Highs |
|---|---|---|---|---|
| January | 55mm | 4 | 13% | 10°C |
| February | 65mm | 5 | 17% | 10°C |
| March | 110mm | 9 | 30% | 13°C |
| April | 125mm | 10 | 33% | 18°C |
| May | 140mm | 11 | 37% | 23°C |
| June | 200mm | 16 | 53% | 28°C |
| July | 180mm | 14 | 47% | 31°C |
| August | 140mm | 11 | 37% | 31°C |
| September | 210mm | 16 | 53% | 28°C |
| October | 180mm | 14 | 47% | 23°C |
| November | 90mm | 7 | 23% | 18°C |
| December | 50mm | 4 | 13% | 13°C |
Rain probability is the chance that at least 0.2mm falls at your location — not how long it rains. For Kamakura we combine the hourly probability curve, expected volume in millimetres, and the city's own rainfall record into a single umbrella verdict.
| Factor | Weight | What it measures |
|---|---|---|
| Hourly probability | 40% | Peak and sustained chance of measurable rain across the next 24 hours. |
| Expected volume | 30% | Total millimetres, which separates a passing shower from a genuine soaking. |
| Timing & duration | 20% | When rain starts, when it eases, and the longest continuous dry window. |
| Local rain type | 10% | Drizzle, brief showers, thunderstorms or monsoon — each needs different gear. |
Live hourly values come from Open-Meteo and refresh through the day. Monthly rainfall figures are climate normals, so they describe a typical year rather than a forecast.
Kamakura records rain on roughly 120 days a year — about a 33% chance on any given day — totalling around 1600mm.
September, with about 210mm over 16 rain days. That is 13% of the entire year's rainfall in a single month.
December is the driest month at 50mm across roughly 4 days. November through February is cold but crisp with clear Pacific Ocean views from the clifftop trails.
Kamakura's hydrangea season (June) is also peak rainy season — embrace the rain with a clear umbrella for atmospheric temple photography. Autumn and winter are drier and crisp.
No. Probability is the chance that at least 0.2mm of rain falls at your location at some point in the period. Check the expected millimetres alongside it: 40% with 0.4mm is a passing shower, 40% with 12mm is a soaking.