Climate Insights for Ubuyama

Aso-gun, Kumamoto, Japan

Hottest
August
30°C peak
Coldest
January
-1°C low
Wettest
June
330mm rain
Best to Visit
Varies throughout year

Climate Overview

The climate in Ubuyama is temperate. The average annual temperature is 14°C and approximately 1916mm of precipitation falls per year. Ubuyama receives a notable amount of rainfall throughout the year, including during its driest month. Ubuyama is in the Northern Hemisphere. Summer begins at the end of June and lasts through September. The summer months are: August, July, September. The coldest months are January, December, February, when temperatures can drop to -1°C. Light snow can occur between January and December.

Temperature

-10° 10° 20° 30° Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Jan Max: 8° Average: 3° Min: -1° Feb Max: 9° Average: 4° Min: 0° Mar Max: 14° Average: 9° Min: 4° Apr Max: 19° Average: 14° Min: 9° May Max: 22° Average: 18° Min: 13° Jun Max: 25° Average: 21° Min: 17° Jul Max: 28° Average: 25° Min: 22° Aug Max: 30° Average: 25° Min: 22° Sep Max: 26° Average: 22° Min: 19° Oct Max: 21° Average: 16° Min: 12° Nov Max: 16° Average: 10° Min: 6° Dec Max: 9° Average: 4° Min: 0°
Max
Average
Min

Temperatures in Ubuyama vary considerably across the year, with a 31°C difference between the coldest and warmest months. The warmest month is August, when average highs reach 30°C and the mean temperature sits around 25°C. The coldest month is January, when overnight lows fall to -1°C and the daily average is 3°C. On average, daily temperatures fluctuate by about 9°C between overnight lows and afternoon highs. The sharpest temperature change occurs between November and December, with a 6°C shift in average temperatures.

Precipitation

0mm 50mm 100mm 150mm 200mm 250mm 300mm 350mm Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Jan Precipitation: 73mm Snow: 8mm Feb Precipitation: 97mm Snow: 4mm Mar Precipitation: 129mm Snow: 1mm Apr Precipitation: 141mm Snow: 0mm May Precipitation: 184mm Snow: 0mm Jun Precipitation: 330mm Snow: 0mm Jul Precipitation: 300mm Snow: 0mm Aug Precipitation: 202mm Snow: 0mm Sep Precipitation: 206mm Snow: 0mm Oct Precipitation: 107mm Snow: 0mm Nov Precipitation: 85mm Snow: 0mm Dec Precipitation: 62mm Snow: 3mm
Precipitation
Snow

Ubuyama is a fairly wet location, receiving approximately 1916mm of precipitation annually, which averages out to around 160mm per month. The wettest month is June, averaging 330mm of rainfall. July and September also tend to see above-average precipitation. The driest month is December, with just 62mm. That's 268mm less than June, the wettest month. Rainfall is heavily concentrated in certain months, creating a distinct wet and dry season. Visitors should plan around these patterns, as the difference between peak and low months is dramatic. Light snowfall can occur between January and December, totalling around 17cm annually. January is the snowiest month with approximately 8cm.

Wind

0km/h 5km/h 10km/h 15km/h Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Jan Wind Speed: 14km/h Feb Wind Speed: 14km/h Mar Wind Speed: 13km/h Apr Wind Speed: 13km/h May Wind Speed: 12km/h Jun Wind Speed: 11km/h Jul Wind Speed: 12km/h Aug Wind Speed: 12km/h Sep Wind Speed: 11km/h Oct Wind Speed: 11km/h Nov Wind Speed: 11km/h Dec Wind Speed: 13km/h
Wind Speed

Ubuyama is mildly breezy, with an average annual wind speed of 12km/h. For context, sustained winds below 12km/h are generally light, while anything above 25km/h is considered strong. The windiest month is February, averaging 14km/h, though still comfortable for most outdoor activities. The calmest conditions occur in October, with average winds dropping to 11km/h, making it an ideal period for wind-sensitive activities. Wind conditions are fairly consistent throughout the year, varying by only 3km/h between the calmest and windiest months. Wind tends to be stronger during winter months, driven by seasonal pressure systems. The seasonal averages break down to 14km/h in winter, 12km/h in spring, 11km/h in summer, 11km/h in autumn.

Seasons

Winter
Dec 21
Spring
Mar 20
Summer
Jun 21
Autumn
Sep 23

87 days until Summer

It is currently spring in Ubuyama, which began on March 20, 2026. Ubuyama is in the Northern Hemisphere, where spring begins in March, summer in June, autumn in September, and winter in December. The warmest period peaks in August at around 30°C, while the coldest stretch bottoms out in January near -1°C. Summer is next, beginning on June 21, 2026 — 87 days from now.

Spring

Temperatures range from 4 to 22°C. Rainfall is heavy, totalling around 454mm across the season with a monthly average of 151mm. Winds are generally light, averaging 12km/h. An umbrella or waterproof jacket is advisable as spring showers are frequent.

Summer

Temperatures range from 17 to 30°C. Rainfall is heavy, totalling around 832mm across the season with a monthly average of 277mm. Winds are generally light, averaging 11km/h. Light, breathable clothing is ideal — perfect conditions for outdoor activities.

Autumn

Temperatures range from 6 to 26°C. Rainfall is heavy, totalling around 398mm across the season with a monthly average of 133mm. Winds are generally light, averaging 11km/h. A waterproof jacket and sturdy footwear are recommended as rain becomes more frequent.

Winter

Temperatures range from -1 to 9°C. Precipitation is moderate at around 233mm for the season, averaging 78mm per month. Expect around 15cm of snow accumulation during this period. Winds are generally light, averaging 14km/h. Warm winter clothing and waterproof boots are a must, and travel may be affected by snow.

Monthly Climate Data

The table below shows monthly climate averages for Ubuyama based on historical weather data. Min and max temperatures represent typical overnight lows and afternoon highs for each month, shown in degrees Celsius (°C). Precipitation is measured in millimetres (mm) and indicates the average total rainfall per month. Snow is measured in centimetres (cm) and reflects average monthly snowfall accumulation. Wind speed is the average sustained speed in kilometres per hour (km/h). All values are based on averages from over 10 years of historical weather data. The current month is highlighted for quick reference.

Month
Min Temperature
Max Temperature
Wind Speed
Precipitation
Snow
Jan
-1 °C
8 °C
14 km/h
73 mm
8 cm
Feb
0 °C
9 °C
14 km/h
97 mm
4 cm
Mar Current
4 °C
14 °C
13 km/h
129 mm
1 cm
Apr
9 °C
19 °C
13 km/h
141 mm
0 cm
May
13 °C
22 °C
12 km/h
184 mm
0 cm
Jun
17 °C
25 °C
11 km/h
330 mm
0 cm
Jul
22 °C
28 °C
12 km/h
300 mm
0 cm
Aug
22 °C
30 °C
12 km/h
202 mm
0 cm
Sep
19 °C
26 °C
11 km/h
206 mm
0 cm
Oct
12 °C
21 °C
11 km/h
107 mm
0 cm
Nov
6 °C
16 °C
11 km/h
85 mm
0 cm
Dec
0 °C
9 °C
13 km/h
62 mm
3 cm
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Metric (°C, km/h)