Chiba, located east of Tokyo along the Pacific coast, features a humid subtropical climate with four distinct seasons. Summers are warm, humid, and rainy, while winters are mild, breezy, and mostly dry. The city experiences significant rainfall in late summer and autumn, and offers comfortable weather in spring and early summer, making it attractive for outdoor activities year-round.
The best times to travel section shows how the months compare for a visit, so you can find the time of year that fits what you want to do.
Background colours of the months:
The colour shows the typical temperature: yellow (hot), green (mild) and blue (cold). How strong the colour is shows the travel season: full colour means high season, soft colour means shoulder season and soft-striped means off season.
Weather symbols:
Each month has one symbol showing what the weather is typically like, such as hot and sunny, freezing or a rainy or snowy season. Use them to quickly spot months that match the weather you want, or to avoid the ones that don't.
Crowdedness:
The people icon shows how busy the place usually is. The more people, the more crowded it gets.
Additional notes:
The grey info boxes point out special things worth knowing, like recurring weather issues or seasonal events.
Chiba’s climate is characterised by notable seasonal variation and high humidity. Summers (June–September) are warm to hot and humid, with average highs reaching 29–31°C in July and August. The rainy season peaks in June and continues into September and October, with October being the wettest month, often receiving over 220 mm of rain. Typhoons can bring intense downpours and strong winds, particularly from August to October. Despite the rain, summer is lively, with beach activities and festivals along the coast. Sea temperatures are warmest in August, averaging 25–27°C, ideal for swimming and surfing.
Winters (December–February) are mild and mostly dry, with average highs of 9–12°C and lows around 3–6°C. Snowfall is rare and usually light, but the season can be breezy. Spring (March–May) and autumn (September–November) offer the most comfortable weather, with mild temperatures (15–24°C), moderate rainfall, and abundant sunshine. Cherry blossoms bloom in late March to early April, while autumn foliage colours the city from late October to November. Chiba receives about 1,600–1,800 mm of precipitation annually and enjoys up to 6.4 hours of sunshine per day in the sunniest months. Winds are generally moderate, averaging 7–15 km/h, but can be brisk during storms and typhoons.
| Average climate data for Chiba, Japan | |||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Month | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | Year |
| Average maximum temperature (°C) | 9 | 10 | 13 | 17 | 22 | 24 | 28 | 30 | 26 | 22 | 17 | 12 | 30 |
| Average minimum temperature (°C) | 4 | 5 | 7 | 11 | 16 | 19 | 23 | 25 | 22 | 17 | 12 | 7 | 4 |
| Average precipitation (mm) | 42 | 48 | 75 | 76 | 72 | 104 | 93 | 61 | 116 | 126 | 66 | 43 | 921 |
| Average rainfall days (days) | 7 | 11 | 15 | 14 | 13 | 18 | 16 | 15 | 16 | 16 | 13 | 9 | 163 |
| Average snowfall (mm) | 2 | 26 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 28 |
| Average snowfall days (days) | 0 | 1 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 2 |
| Average relative humidity (%) | 62 | 65 | 68 | 69 | 73 | 79 | 83 | 79 | 78 | 73 | 72 | 65 | 72 |
| Average wind speed (km/h) | 16 | 17 | 17 | 17 | 15 | 13 | 15 | 14 | 14 | 15 | 14 | 15 | 15 |
| Average water temperature (°C) | 16 | 14 | 15 | 17 | 18 | 21 | 24 | 25 | 25 | 22 | 20 | 17 | 20 |
| Average daily daylight hours (h) | 10 | 10 | 12 | 13 | 14 | 14 | 14 | 13 | 12 | 11 | 10 | 9 | 12 |
| Average daily sunshine hours (h) | 6 | 5 | 6 | 8 | 9 | 8 | 9 | 10 | 7 | 6 | 5 | 5 | 7 |
| Average cloud coverage (%) | 31 | 43 | 45 | 43 | 39 | 48 | 41 | 35 | 42 | 45 | 40 | 34 | 40 |
| Average UV index | 3 | 3 | 3 | 5 | 5 | 6 | 7 | 6 | 6 | 5 | 3 | 3 | 5 |
The best time to visit Chiba is in spring (late March to June) and autumn (late September to November). These periods offer mild, comfortable temperatures, beautiful cherry blossoms or autumn foliage, and fewer crowds than peak summer. Outdoor activities, sightseeing, and beach outings are especially enjoyable during these clear, pleasant months.
The least favourable time to visit Chiba is from late June to October, when the city experiences its rainy season, peak summer heat, high humidity, and frequent typhoons. Heavy rainfall and stormy weather can disrupt outdoor plans, and the heat can be uncomfortable for sightseeing or hiking.
Chiba has a humid subtropical climate with warm, humid summers and mild, breezy winters. Rainfall is substantial year-round, especially in June, September, and October. Spring and autumn are mild and pleasant.
The rainy season in Chiba runs from June to July, with additional heavy rainfall in September and October due to typhoons. October is typically the wettest month of the year.
Snowfall in Chiba is rare and usually light. When it does snow, it melts quickly due to mild winter temperatures. Most winter days are sunny and dry, but breezy.
Summer temperatures in Chiba typically range from 20°C at night to 31°C during the day. Humidity is high, and the season is often cloudy with frequent rainfall and occasional typhoons.
The best months for swimming and beach activities are July to September, when sea temperatures reach 25–27°C. Earlier and later months are cooler, so swimming is less common.
Yes, Chiba can be affected by typhoons from August to October, bringing heavy rain and strong winds. Travellers should check forecasts during this period and plan accordingly.
Chiba receives about 1,600–1,800 mm of precipitation each year, with the wettest months being June, September, and October. Rain gear is recommended for travel year-round.
The warmest month, with the highest average maximum temperature, is August (29.9 °C). The month with the lowest average maximum temperature is January (9.2 °C). Overall, the average maximum temperature over the whole year is 19.1 °C.
The month with the highest average minimum temperature is August (24.9 °C). The coldest month, with the lowest average minimum temperature, is January (3.8 °C). Overall, the average minimum temperature over the whole year is 14 °C.
The month with the highest average water temperature is August (25.4 °C). The month with the lowest average water temperature is February (14.4 °C). Overall, the average water temperature over the whole year is 19.5 °C.
The wettest month, with the highest amount of precipitation, is October (125.7 mm). The driest month, with the least amount of precipitation, is January (41.6 mm). Over the whole year there are 921.2 mm of rainfall on average.
The month with the most days of rain is June (17.9 days). The month with the fewest days of rain is January (7.1 days). Over the whole year there are 162.7 days of rain on average.
The month with the most snowfall is February (26 mm). The months with the least snowfall are March, April, May, June, July, August, September, October, November and December (0 mm). Over the whole year there are 28 mm of snowfall on average.
The month with the most days of snowfall is February (1.2 days). The months with the fewest days of snowfall are March, May, June and July (0 days). Over the whole year there are 2 days of snowfall on average.
The month with the highest average relative humidity is July (83 %). The month with the lowest average relative humidity is January (62.1 %). The overall average relative humidity over the whole year is 72.2 %.
The windiest month, with the highest average wind speed, is April (17.5 km/h). The calmest month, with the lowest average wind speed, is June (13.3 km/h). The overall average wind speed over the whole year is 15.4 km/h.
The month with the cloudiest skies, so the highest cloud coverage, is June (47.9 %). The month with the clearest skies, so the lowest cloud coverage, is January (31.2 %). Over the whole year there is an average cloud coverage of 40.5 %.
The month with the longest days, so the most daylight, is June (Average daylight: 14 h). The month with the shortest days, so the least daylight, is December (Average daylight: 9.1 h). Over the whole year there are 11.9 h of daylight per day on average.
The month with the most sunshine per day is August (Average sunshine: 10 h). The month with the least sunshine per day is February (Average sunshine: 4.9 h). Over the whole year there are 7 h of sunlight per day on average.
The month with the highest average UV index is July (UV index: 7). The months with the lowest average UV index are January, February, March, November and December (UV index: 3). Over the whole year the average UV index is 4.6.
