Last updated: August 21, 2025
In Chiba, Japan, the weather in May welcomes a delightful transition into warmer days. With maximum temperatures reaching 27°C (81°F) and an average of 19°C (66°F), the climate is pleasantly mild. However, the minimum temperatures can dip to 10°C (51°F), reminding us of the lingering chill. Expect moderate rainfall, as the month sees a total of 147 mm (5.8 in) across 12 rain-soaked days, contributing to the region's lush greenery. The high humidity level of 81% adds a soft veil to the vibrant atmosphere, making May an enchanting time to experience the beauty of Chiba.
In May, Chiba, Japan begins to embrace the warmth of spring, showing a noticeable shift from the cooler temperatures of previous months. The minimum temperature rises to a comfortable 10°C (51°F), while the average reaches a pleasant 19°C (66°F), peaking at a delightful 27°C (81°F) during the day. This month signifies a transition, as nature awakens with vivid greenery and blossoms, accompanied by increasingly sunny skies. As the temperatures continue to climb, outdoor activities become more appealing, making May an ideal time to enjoy the beauty of Chiba's parks and coastal areas before the heat of summer sets in.
In May, Chiba, Japan experiences a notable surge in precipitation, recording 147 mm (5.8 in) over 12 days. This increase follows the wet conditions of April, which sees 137 mm (5.4 in) across 11 days. The rainfall in May acts as a lead-in to the even wetter months of June and July, where totals escalate sharply, hinting at the start of Japan's summer monsoon season. As the landscape blossoms with the lush greenery of late spring, the consistent rain provides a crucial boost to growth, establishing May as a pivotal month in the annual precipitation cycle.
May marks a notable shift in Chiba, Japan's humidity levels, rising to a brisk 81% compared to the previous months. This increase signals the approach of summer, following a gradual decline from 76% in January to a relatively stable 70% in March. As spring progresses, April sees a slight rebound to 74%, but it's in May that the humidity truly surges, foreshadowing the muggy conditions of the upcoming summer months. With June ramping up to 88% and July soaring to 93%, it becomes clear that May not only stands out with its humidity, but also acts as a clear precursor to the sultry, tropical feel that characterizes the region in the height of summer.
As May arrives in Chiba, Japan, the UV Index reaches a significant peak of 10, indicating a very high exposure category. This trend marks a continuation from the previous month, where the UV Index surged to 9 in April, highlighting the increasing intensity of sunlight as spring progresses towards summer. With a burn time of just 15 minutes, residents and visitors alike should take protective measures against potential skin damage, as the risk of harm from unprotected sun exposure escalates. Notably, this month serves as a precursor to an even more intense June, when the UV Index climbs to 11 in the extreme category. Staying informed is crucial, so for more insights on UV levels throughout the year, visit Chiba UV Index.
UV Risk Categories
In Chiba, Japan, May shines brightly with an impressive 281 hours of sunshine, marking it as one of the sunniest months of the year. This delightful increase from 270 hours in April reflects a stunning trend as the region transitions into the warmth of summer. Following the peak in May, sunshine hours slightly dip in June, dropping to 257 hours, yet the overall pattern hints at a steady progression from the cooler months. After a modest start in January with just 189 hours, Chiba experiences a gradual ascent, building up to a sunny crescendo in both May and August, where sunshine peaks at 288 hours. Such a vibrant display of sunlight not only enriches the landscape but also invigorates the spirit, making May a truly radiant experience in Chiba.
In Chiba, Japan, the likelihood of sunny weather takes a noticeable dip in May with only a 24% chance of sunshine, making it one of the less bright months of the year. This decrease follows a generally inconsistent pattern of sunshine probability throughout the spring, where March starts at 41% and only rises slightly to 50% in April. As the warmer months approach, the chances of sun bounce back in July and August, showing a seasonal trend of fluctuating sunlight—a reminder that while May may be less sunny, it contributes to the lush vibrancy of the season that follows.
As spring blossoms into summer in Chiba, Japan, daylight duration sees a remarkable rise. Starting the year with a modest 10 hours in both January and February, the days gradually grow longer. By March, we welcome 11 hours of daylight, paving the way for a vibrant April that boasts 13 hours of sunshine. **May shines brightly with 14 hours, marking the peak of this trend, a length of daylight that is mirrored in June and July. As summer wanes towards August, daylight gently diminishes to 13 hours, continuing the gradual decline into early autumn. By November, daylight shortens to 10 hours, culminating in December with just 9 hours, showcasing the cyclical rhythm of Chiba's seasons. This dance of daylight underscores the beauty of nature's transition, inviting residents and visitors alike to savor longer days and the warmth of the sun during the summer months.
In May, Chiba experiences a noticeable uptick in average wind speed, reaching 5.0 m/s (11 mph), making it one of the breeziest months of the year. This rise is particularly striking when compared to the preceding months, where wind speeds hovered around 4.4 m/s (10 mph) or less. The invigorating gusts of May signal a shift in the season, offering refreshing breezes that complement the blossoming landscapes. Following this peak, a gentle decline is observed in the summer months, where speeds drop to 3.1 m/s (7 mph) in July, suggesting a tranquil interlude before the winds pick up again in autumn. Embracing the dynamic nature of Chiba’s winds, May stands out as a vibrant month, ideal for outdoor activities, as the warmth of spring dances alongside more spirited breezes.
Weather in Chiba varies notably across the year, with each month offering distinct climate conditions. This page compares May’s weather to other months in Chiba, focusing on differences in temperature, rainfall, humidity, and UV levels.
May and January present quite contrasting weather conditions. In May, temperatures range from a minimum of 10°C (51°F) to a maximum of 27°C (81°F), with an average of 19°C (66°F). This month experiences higher humidity at 81% and more precipitation, totaling 147 mm (5.8 in) over approximately 12 days, contributing to a lush, vibrant environment. In contrast, January is much colder, with temperatures ranging from -2°C (28°F) to a maximum of 16°C (61°F), averaging just 6°C (43°F). This winter month has significantly less precipitation, at 63 mm (2.5 in) over about 5 days, and slightly lower humidity at 76%. For a more detailed look at how January weather unfolds, check out Chiba weather in January.
May and February display stark contrasts in weather. In May, temperatures range from a minimum of 10°C (51°F) to a maximum of 27°C (81°F), with an average of 19°C (66°F). This month also experiences significant rainfall, totaling 147 mm (5.8 in) over about 12 days, alongside high humidity levels at 81%. In contrast, February features much cooler temperatures, with a minimum of 0°C (32°F) and a maximum of 16°C (62°F), averaging just 7°C (44°F). Rainfall is considerably lower in February, with only 50 mm (2.0 in) recorded over 7 days, and humidity at a more moderate 74%. For more specific information, you can find details on Chiba weather in February.
In comparing the weather between March and May, May boasts significantly warmer temperatures, with an average of 19°C (66°F) and maximums reaching up to 27°C (81°F), compared to March's average of 10°C (50°F) and a maximum of 20°C (68°F). However, March tends to experience slightly more precipitation, with 162 mm (6.4 in) over 13 days, compared to May's 147 mm (5.8 in) over 12 days. Humidity levels also differ, with May exhibiting a higher average of 81%, while March maintains a more moderate 70%. For a closer look at March weather specifics, visit Chiba weather in March.
In comparing the weather of May and April, it is clear that May experiences warmer temperatures, with averages rising to 19°C (66°F) compared to April's average of 14°C (57°F). The maximum temperature in May reaches a pleasant 27°C (81°F), while April peaks at a lower 24°C (76°F). Precipitation levels are slightly higher in May, totaling 147 mm (5.8 in) over 12 days, as opposed to April's 137 mm (5.4 in) across 11 days. Additionally, May is characterized by higher humidity, averaging 81%, compared to April's 74%. For a more detailed look at April's weather, visit Chiba weather in April.
In comparing the weather of May and June, it’s evident that June tends to be warmer and more humid. May sees average temperatures ranging from a minimum of 10°C (51°F) to a maximum of 27°C (81°F), while June experiences milder lows of 16°C (61°F) and highs reaching up to 31°C (88°F). Additionally, June has a higher average precipitation of 190 mm (7.5 in) over 14 days, compared to May's 147 mm (5.8 in) over 12 days, resulting in a slightly more humid atmosphere at 88% in June versus 81% in May. For more detailed insights, you can explore Chiba weather in June.
In comparing the weather in May and July, it is clear that July experiences warmer temperatures, with a minimum of 19°C (66°F) and a maximum reaching up to 36°C (97°F), compared to May's range of 10°C (51°F) to 27°C (81°F). The average temperature in July is also higher at 25°C (78°F), making it a noticeably hotter month. However, July brings increased precipitation, with 226 mm (8.9 in) falling over 16 days, which is significantly more than May's 147 mm (5.8 in) over 12 days. Additionally, humidity levels rise in July to 93%, compared to 81% in May, contributing to a more oppressive and muggy atmosphere. For a detailed overview of July weather, you can check Chiba weather in July.
May and August present quite different weather conditions. In May, temperatures range from a cool 10°C (51°F) to a warm 27°C (81°F), with an average of 19°C (66°F). This month experiences significant rainfall, totaling 147 mm (5.8 in) over about 12 days, accompanied by a humidity level of 81%. In contrast, August boasts higher temperatures, with a minimum of 20°C (69°F), an average of 27°C (81°F), and a maximum reaching up to 33°C (92°F). Although it experiences slightly less precipitation than May, at 118 mm (4.7 in) over 13 days, the humidity rises to 90%, making it feel quite muggy. For more details on August weather, check Chiba weather in August.
May and September offer distinct weather patterns, highlighting the transition from spring to early autumn. In May, temperatures range from a mild 10°C (51°F) at night to a pleasant average of 19°C (66°F) during the day, peaking at 27°C (81°F). However, this month also sees a significant amount of rainfall, with 147 mm (5.8 in) falling over 12 days, and humidity levels are relatively high at 81%.
In contrast, September boasts warmer temperatures, with a minimum of 16°C (60°F), averaging 24°C (75°F), and reaching a high of 32°C (89°F). Despite the warmth, it experiences even greater precipitation, totaling 232 mm (9.1 in) over 18 days, accompanied by humidity at 86%. For a more detailed perspective on September weather, you can visit Chiba weather in September.
In May, temperatures range from a minimum of 10°C (51°F) to a maximum of 27°C (81°F), with an average of 19°C (66°F). During this month, precipitation totals around 147 mm (5.8 in) over approximately 12 days, accompanied by a humidity level of 81%.
In contrast, October shows similar average temperatures, with a minimum of 11°C (53°F) and a maximum of 28°C (83°F), also averaging 19°C (66°F). However, October experiences significantly more rainfall, with a total of 313 mm (12.3 in) spread across 17 days and a slightly higher humidity of 83%. For more detailed insights into October's weather, you can visit Chiba weather in October.
May and November exhibit distinct weather characteristics. In May, temperatures range from a minimum of 10°C (51°F) to a maximum of 27°C (81°F), with an average of 19°C (66°F). This month experiences higher precipitation at 147 mm (5.8 in) over 12 days, coupled with a humidity level of 81%. In contrast, November presents cooler conditions, with temperatures averaging 14°C (58°F), peaking at 21°C (71°F) and dipping to a minimum of 5°C (41°F). It also sees less precipitation, totaling 119 mm (4.7 in) over the same number of days, and a slightly lower humidity of 80%. For more detailed information, you can check Chiba weather in November.
In May, the weather is generally warmer, with average temperatures ranging from a minimum of 10°C (51°F) to a maximum of 27°C (81°F), accompanied by high humidity at 81%. This month also sees significant rainfall, with approximately 147 mm (5.8 in) over about 12 days. In contrast, December experiences cooler temperatures, averaging between 0°C (33°F) and 20°C (68°F) and with a lower average humidity of 78%. Precipitation is less frequent in December, totaling around 80 mm (3.2 in) across 8 days. For more detailed insights, you can check out Chiba weather in December.
May in Chiba ushers in a delightful transition from the cooler spring months to a warmer summer atmosphere. With pleasant temperatures averaging around 19°C (66°F) and peaks reaching up to 27°C (81°F), it's a perfect time for outdoor activities. While the humidity remains relatively high at 81%, the overall feel is still comfortable compared to the sweltering heat of July and August. However, be prepared for some rain, as May experiences an average precipitation of 147 mm (5.8 in) over about 12 days. This blend of warmth and occasional showers helps to rejuvenate the lush scenery that Chiba is known for, making it a vibrant month on the calendar. For more insights on the weather throughout the year, explore Chiba Climate.