Climate and monthly weather forecastYokohama, Japan
Climate and monthly weather forecast
The climate of Yokohama
Classified under the Köppen climate system as Cfa, prevalent weather conditions in Yokohama, Japan, are typically described as a humid subtropical climate, largely due to its lack of a definite dry season. Yokohama's geographical location along the Honshu island's eastern coast affects the city's climate pattern, contributing to the subtle variations seen across the individual weather parameters throughout the year.In terms of temperature, Yokohama's annual highs and lows demonstrate a clear seasonality. The warmer months of July and August see the peak temperatures, averaging from 28.2°C (82.8°F) to a high of 29.8°C (85.6°F), while January and February are predominantly chilly, with average high temperatures barely above 10.1°C (50.2°F). Concurrently, low temperatures take a similar pathway, averaging 25.3°C (77.5°F) in August, sharply dropping to a cold 4°C (39.2°F) in January.
Relative humidity levels throughout the year remain fairly consistent, with relatively minor fluctuations. The values tend to stay between 60% and 80%, with the highest registered values reported during the months of July and August.
The pattern of rainfall in Yokohama displays certain monthly variations. The city witnesses the maximum rainfall, 126mm (4.96"), in the month of October. Conversely, January reports the lowest amount of rainfall with 40mm (1.57") on average. Notably, December and November are comparatively drier with less than 65mm (2.56") of rainfall.
The best time to visit Yokohama
Weather patterns suggest that the most accommodating period to visit Yokohama is arguably between April and June. During these months, the city experiences moderate temperatures, ranging from a comfortable 17.1°C (62.8°F) to 24.2°C (75.6°F). Correspondingly, this period witnesses less rainfall compared to the rest of the year to enhance outdoor activities. From beach lounging to city touring, the pleasant temperatures along with reduced rainfall make this period ideal for a wide range of sight-seeing options.The worst time to visit Yokohama
From the climatological data, it appears that late autumn, specifically October, may not be the most highly recommended time to visit Yokohama. Not only is it the month with the highest recorded rainfall, averaging 126mm (4.96"), but it also has a high count of rainfall days, 15.9 days on average. The city also experiences warmer temperatures during late summer to early fall, from July to September, with maximum temperatures rising up to 29.8°C (85.6°F). High heat combined with rain could potentially hamper outdoor explorations and sight-seeing experiences.Spring weather in Yokohama
Spring, spanning March to May, showcases mild and favorable weather conditions in Yokohama. During this time, daily high temperatures exhibit a gradual warming trend, moving from 12.9°C (55.2°F) in March to warmer 21.9°C (71.4°F) in May. Similarly, night temperatures also rise over this period from 7.1°C (44.8°F) to 16.4°C (61.5°F). Concurrently, rainfall amounts increase slightly, commencing at 79mm (3.11") in March and reaping a peak of 79mm (3.11") again in April, before tapering off to 65mm (2.56") in May.Summer weather in Yokohama
Summer months, June through August, in Yokohama are typically hot, with July and August witnessing the hottest conditions. The city experiences average high temperatures of 28.2°C (82.8°F) in July, escalating to the annual highest of 29.8°C (85.6°F) in August. In conjunction, nightly low temperatures remain warm, averaging between 23.5°C (74.3°F) and 25.3°C (77.5°F). Despite the heat, humidity levels soar to the highest for the year, notably a high of 80% in July.Autumn weather in Yokohama
Autumn months of September through November in Yokohama are characterized by a progressive cooling of temperatures and an increase in rainfall. Average high temperatures drop from 26.5°C (79.7°F) in September to a cooler 16.7°C (62.1°F) by November. In terms of rainfall, October is the rainiest month with an average of 126mm (4.96") and close to 16 rainy days.Winter weather in Yokohama
Winter in Yokohama, which lasts from December to February, is marked by colder temperatures and relatively low rainfall. Average high temperatures hover around 10.1°C (50.2°F) in February, with the lowest annual temperature of 4°C (39.2°F) recorded in January. Rainfall levels in winter are the lowest for the year, with January witnessing an average of only 40mm (1.57").Weather in January
January in Yokohama ushers in the new year with relatively mild weather, characterized by moderate temperatures ranging from 4°C (39.2°F) at night to a daytime high of 9.3°C (48.7°F). The arrival of winter is accompanied by increased humidity and the potential for brief showers. Weather in January »Weather in February
Shaking off the coolness of January, Yokohama sees a slight increase in temperatures during February with lows of 4.4°C (39.9°F) and highs of 10.1°C (50.2°F). Overcast skies are more common this month, and the city experiences its first substantial snowfall of the year at 22mm (0.87"). Weather in February »Weather in March
March ushers in the end of Yokohama's brief winter, with temperatures rising to an average high of 12.9°C (55.2°F). The transition into spring is marked by increased humidity and notably heavier rainfall compared to the previous months. Weather in March »Weather in April
April signifies a clear shift in Yokohama weather patterns as the climate comfortably eases into spring. An evident increase of temperatures marks the transition, from lows of 11.4°C (52.5°F) to high temperatures reaching 17.1°C (62.8°F). Weather in April »Weather in May
The month of May in Yokohama sees another increase in temperatures, this time reaching up to 21.9°C (71.4°F) while the lowest dips to 16.4°C (61.5°F). Bringing along with it an increase in the UV index warning residents and tourists to take protective measures while venturing out in the sun. Weather in May »Weather in June
As summer begins to roll in, June in Yokohama experiences warmer conditions with average temperatures reaching as high as 24.2°C (75.6°F). The increase in rainfall signifies the arrival of the East Asian monsoon season, which is marked by frequent heavy showers. Weather in June »Weather in July
July is characteristically the warmest month in Yokohama with average daily high temperatures peaking at 28.2°C (82.8°F). The monsoon showers from June persist, leading to high humidity levels that could feel oppressive for those unaccustomed to such conditions. Weather in July »Weather in August
Plunging into the depth of summer, August continues the warm trend seen in July, but temperatures reach their peak now with highs of 29.8°C (85.6°F). High humidity persists in Yokohama, though the frequency of rainfalls sees a notable drop as compared to the previous months. Weather in August »Weather in September
September brings a slight relief from the intense summer heat, with temperatures declining to highs of around 26.5°C (79.7°F). However, with rainfall amounting to 104mm (4.09"), it is the wettest month of the year in Yokohama. Weather in September »Weather in October
October is when Yokohama truly begins to see and feel the onset of autumn. The temperatures steadily decrease, providing relief from the residual heat of summer. Rainfall remains high, keeping the city's climate humid and leading to the beautiful change in foliage that autumn brings. Weather in October »Weather in November
As autumn progresses in Yokohama, November witnesses a marked drop in temperatures with average high temperatures of 16.7°C (62.1°F). The humidity levels and rainfall continue on the downward trend, setting the stage for the approaching winter. Weather in November »Weather in December
December in Yokohama greets the arrival of winter with cooler temperatures and declining humidity levels. It marks a significant difference in temperatures between day and night, signaling the onset of chillier days ahead. Rainfall, while still present, diminishes significantly in comparison to the previous months. Weather in December »Updated: Jan 31, 2024
Published by: Weather Atlas | About Us
Data Sources | Weather Forecasting & Climate
Published by: Weather Atlas | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
January stands out as Yokohama's coldest month, with an average high-temperature of 9.3°C (48.7°F) and a low-temperature of 4°C (39.2°F).
The least humid month is January, with an average relative humidity of 60%.
Throughout the year, in Yokohama, Japan, there are 160.5 rainfall days, and 884mm (34.8") of precipitation is accumulated.
January through March are months with snowfall.
In Yokohama, during the entire year, snow falls for 2.8 days and aggregates up to 25mm (0.98") of snow.
January through March and December, with an average maximum UV index of 3, are months with the lowest UV index.
February is the month with the most snowfall. Snow falls for 1.6 days and accumulates 22mm (0.87") of snow.
February and March, with an average sea temperature of 16.2°C (61.2°F), are months with the coldest seawater in Yokohama.
February has the least sunshine of the year in Yokohama, Japan, with an average of 5.5h of sunshine.
April through December are months without snowfall in Yokohama.
With an average of 14h and 30min of daylight, June has the longest days of the year in Yokohama, Japan.
With an average relative humidity of 80%, July is the most humid month.
With an average maximum UV index of 7, July is the month with the highest UV index.
August temperatures in Yokohama tend to peak at an average high of 29.8°C (85.6°F) and dip to a low of 25.3°C (77.5°F).
August is the month with the warmest seawater in Yokohama, with an average sea temperature of 26.2°C (79.2°F).
With an average of 10.5h of sunshine, August has the most sunshine of the year.
The month with the most rainfall in Yokohama, Japan, is October, when the rain falls for 15.9 days and typically aggregates up to 126mm (4.96") of precipitation.
The month with the least rainfall in Yokohama, Japan, is December, when the rain falls for 9 days and typically collects 40mm (1.57") of precipitation.
The month with the shortest days is December, with an average of 9h and 48min of daylight.
Yokohama does not utilize Daylight Saving Time (DST). JST timezone is used throughout the entire year.
Average temperature
Yokohama, Japan
The warmest month (with the highest average high temperature) is August (29.8°C).
The month with the lowest average high temperature is January (9.3°C).
The month with the highest average low temperature is August (25.3°C).
The coldest month (with the lowest average low temperature) is January (4°C).
Average pressure
Yokohama, Japan
- Average pressure in January:
1016.2mbar - Average pressure in February:
1017mbar - Average pressure in March:
1015.4mbar - Average pressure in April:
1014.2mbar - Average pressure in May:
1011.9mbar - Average pressure in June:
1009.1mbar
- Average pressure in July:
1009.8mbar - Average pressure in August:
1010.2mbar - Average pressure in September:
1013.4mbar - Average pressure in October:
1016.4mbar - Average pressure in November:
1018mbar - Average pressure in December:
1016.3mbar
The month with the highest atmospheric pressure is November (1018mbar).
The month with the lowest atmospheric pressure is June (1009.1mbar).
Average wind speed
Yokohama, Japan
- Average wind speed in January:
16km/h - Average wind speed in February:
17.2km/h - Average wind speed in March:
17.8km/h - Average wind speed in April:
17.9km/h - Average wind speed in May:
16.1km/h - Average wind speed in June:
14.2km/h
- Average wind speed in July:
15.6km/h - Average wind speed in August:
14.9km/h - Average wind speed in September:
14.7km/h - Average wind speed in October:
16.3km/h - Average wind speed in November:
14.8km/h - Average wind speed in December:
15.6km/h
The windiest month (with the highest average wind speed) is April (17.9km/h).
The calmest month (with the lowest average wind speed) is June (14.2km/h).
Average humidity
Yokohama, Japan
The month with the highest relative humidity is July (80%).
The month with the lowest relative humidity is January (60%).
Average rainfall
Yokohama, Japan
The wettest month (with the highest rainfall) is October (126mm).
The driest month (with the least rainfall) is December (40mm).
Average rainfall days
Yokohama, Japan
- Average rainfall days in January:
8.3 days - Average rainfall days in February:
10.6 days - Average rainfall days in March:
15.7 days - Average rainfall days in April:
14.5 days - Average rainfall days in May:
13.8 days - Average rainfall days in June:
16.1 days
- Average rainfall days in July:
15.8 days - Average rainfall days in August:
13.3 days - Average rainfall days in September:
15 days - Average rainfall days in October:
15.9 days - Average rainfall days in November:
12.5 days - Average rainfall days in December:
9 days
The month with the highest number of rainy days is June (16.1 days).
The month with the least rainy days is January (8.3 days).
Average snowfall
Yokohama, Japan
The month with the highest snowfall is February (22mm).
The months with the least snowfall are April, May, June, July, August, September, October, November and December (0mm).
Average snowfall days
Yokohama, Japan
- Average snowfall days in January:
0.7 days - Average snowfall days in February:
1.6 days - Average snowfall days in March:
0.3 days - Average snowfall days in April:
0 days - Average snowfall days in May:
0 days - Average snowfall days in June:
0 days
- Average snowfall days in July:
0 days - Average snowfall days in August:
0 days - Average snowfall days in September:
0 days - Average snowfall days in October:
0 days - Average snowfall days in November:
0 days - Average snowfall days in December:
0.2 days
The month with the highest number of snowfall days is February (1.6 days).
The months with the least snowfall days are April, May, June, July, August, September, October and November (0 days).
Average sea temperature
Yokohama, Japan
The best month for swimming (with the highest average sea temperature) is August (26.2°C).
The coldest months (with the lowest average sea temperature) are February and March (16.2°C).
Average daylight / Average sunshine
Yokohama, Japan
- Average daylight in January:
10h and 6min - Average daylight in February:
10h and 54min - Average daylight in March:
12h and 0min - Average daylight in April:
13h and 6min - Average daylight in May:
14h and 0min - Average daylight in June:
14h and 30min
- Average daylight in July:
14h and 18min - Average daylight in August:
13h and 30min - Average daylight in September:
12h and 24min - Average daylight in October:
11h and 18min - Average daylight in November:
10h and 18min - Average daylight in December:
9h and 48min
The month with the longest days is June (Average daylight: 14h and 30min).
The month with the shortest days is December (Average daylight: 9h and 48min).
- Average sunshine in January:
6h and 18min - Average sunshine in February:
5h and 30min - Average sunshine in March:
6h and 36min - Average sunshine in April:
8h and 48min - Average sunshine in May:
9h and 24min - Average sunshine in June:
8h and 42min
- Average sunshine in July:
9h and 42min - Average sunshine in August:
10h and 30min - Average sunshine in September:
8h and 0min - Average sunshine in October:
6h and 42min - Average sunshine in November:
5h and 54min - Average sunshine in December:
6h and 12min
The month with the most sunshine is August (Average sunshine: 10h and 30min).
The month with the least sunshine is February (Average sunshine: 5h and 30min).
Average sunshine days
Yokohama, Japan
- Average sunshine days in January:
20.8 days - Average sunshine days in February:
14.3 days - Average sunshine days in March:
13.2 days - Average sunshine days in April:
12.9 days - Average sunshine days in May:
15.3 days - Average sunshine days in June:
12.2 days
- Average sunshine days in July:
14 days - Average sunshine days in August:
15.3 days - Average sunshine days in September:
12.1 days - Average sunshine days in October:
11.7 days - Average sunshine days in November:
15.2 days - Average sunshine days in December:
19.7 days
The month with the most sunshine days is January (20.8 days).
The month with the least sunshine days is October (11.7 days).
Average UV index
Yokohama, Japan
The month with the highest UV index is July (UV index 7).
The months with the lowest UV index are January, February, March and December (UV index 3).
Average cloud cover
Yokohama, Japan
The month with the most cloud cover is October (Cloud cover 44).
The month with the least cloud cover is January (Cloud cover 30).
Average visibility
Yokohama, Japan
The months with the highest visibility are January, February, March, April, May, June, July, August, September, October, November and December (10km).
The months with the lowest visibility are January, February, March, April, May, June, July, August, September, October, November and December (10km).
