Climate Chart of Chiba, Japan

Monthly data: Temperature °C, Rain (mm), Sunshine (h) · 2013–2023

For Chiba, Japan, the climate data cover 2013–2023. Monthly mean temperatures range from January at 5.0 °C to August at 27.1 °C, giving a broad sense of the yearly thermal range without describing daytime highs or lows. Rainfall, sunshine and snowfall also vary through the calendar, so the figures are most useful as planning context rather than a promise of conditions on any particular day.

Climate overview

Temperature

The monthly mean temperature is lowest in January, at 5.0 °C, and reaches its annual peak in August, at 27.1 °C. These figures describe averages across each month, not typical daytime maximum temperatures, so actual conditions can vary around them. Across the calendar months, the unweighted mean of monthly mean temperatures is 15.9 °C. It provides a compact overview, but is not a day-weighted annual average.

Rain

Mean daily rainfall is lowest in January, at 2.09 mm/day, while the highest monthly mean occurs in October, at 7.49 mm/day. These are daily averages for their respective months, not monthly accumulated totals; neither value indicates how often rain falls or guarantees a dry or wet day. The unweighted mean of the monthly mean daily rainfall figures is 4.48 mm/day. It offers a broad reference across the calendar, rather than a day-weighted annual figure.

Sunshine

Average daily sunshine duration peaks in August, at 9.79 hours/day, and is lowest in October, at 6.66 hours/day. Sunshine duration can help frame expectations for outdoor plans, but it is not the same as daylight length and does not guarantee clear skies on a particular date. The unweighted mean across monthly mean sunshine durations is 7.91 hours/day per day, a general calendar-wide reference rather than a day-weighted annual average.

Snow

The highest monthly mean daily snowfall is recorded in February, at 3.05 mm/day; the unweighted mean of monthly mean daily snowfall is 0.38 mm/day. These averages describe snowfall amounts, not the number of snowy days, snow depth, or whether snow cover or skiing conditions are present.

Best Travel Time Guide for Chiba, Japan: Ideal Seasons and Weather Insights

For visitors prioritising lower average rainfall, January is the criterion-based option, with mean daily rainfall of 2.09 mm/day. This does not guarantee dry days or reveal how rainfall is distributed, so flexible outdoor plans and rain protection remain sensible. If cooler monthly-average conditions are the priority, consider January, when the monthly mean temperature is 5.0 °C; it is an average, not a forecast of daytime conditions. For rain preparation, note that the highest mean daily rainfall is in October, at 7.49 mm/day.

For planning daylight outdoor activities, average daily sunshine reaches its high in August at 9.79 hours/day, while its low is in October at 6.66 hours/day. These measures describe sunshine duration, not day length or guaranteed sunshine, so they can guide expectations without settling the best time to visit for every traveller. Snowfall averages alone should not determine winter plans: the highest monthly mean daily amount is 3.05 mm/day in February, but this does not establish snowy-day frequency, snow cover, or skiing conditions.

Climate Data Overview for Chiba, Japan

Explore the comprehensive climate data for Chiba, Japan. This detailed table provides valuable insights into temperature variations, precipitation levels, and seasonal changes, helping you understand the unique weather patterns of this region.

Month	Average: Temperature °C	Rain (mm) / day	Snow (mm) / day	Sunshine (h) / day
Jan	5.0	2.09	1.15	7.31
Feb	5.9	2.25	3.05	7.55
Mar	10.1	4.10	0.20	7.78
Apr	14.0	4.74	0.00	8.50
May	18.7	4.19	0.00	9.11
Jun	21.7	6.20	0.00	7.97
Jul	25.6	5.83	0.00	8.78
Aug	27.1	3.84	0.00	9.79
Sep	23.6	6.54	0.00	7.63
Oct	18.2	7.49	0.00	6.66
Nov	13.2	3.87	0.10	6.82
Dec	7.7	2.58	0.02	7.04
Average	15.9	4.48	0.38	7.91