Climate Insights for Motoyama

Nagaoka Gun, Kochi Prefecture, Japan

Hottest
August
30°C peak
Coldest
January
1°C low
Wettest
July
420mm rain
Best to Visit
Varies throughout year

Climate Overview

The climate in Motoyama is temperate. The average annual temperature is 15°C and approximately 2548mm of precipitation falls per year. Motoyama receives a notable amount of rainfall throughout the year, including during its driest month. Motoyama 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, February, December, when temperatures can drop to 1°C. Light snow can occur between January and December.

Temperature

10° 15° 20° 25° 30° Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Jan Max: 8° Average: 4° Min: 1° Feb Max: 9° Average: 5° Min: 1° Mar Max: 14° Average: 9° Min: 5° Apr Max: 18° Average: 14° Min: 9° May Max: 22° Average: 18° Min: 14° Jun Max: 25° Average: 21° Min: 18° Jul Max: 29° Average: 25° Min: 23° Aug Max: 30° Average: 26° Min: 23° Sep Max: 27° Average: 23° Min: 20° Oct Max: 22° Average: 17° Min: 13° Nov Max: 16° Average: 12° Min: 8° Dec Max: 10° Average: 6° Min: 2°
Max
Average
Min

Temperatures in Motoyama vary considerably across the year, with a 29°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 26°C. January is the coolest month, with minimum temperatures around 1°C and an average of 4°C. Daily temperature variation is modest, with an average difference of 8°C between highs and lows. The sharpest temperature change occurs between September and October, with a 6°C shift in average temperatures.

Precipitation

0mm 50mm 100mm 150mm 200mm 250mm 300mm 350mm 400mm 450mm Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Jan Precipitation: 78mm Snow: 8mm Feb Precipitation: 97mm Snow: 5mm Mar Precipitation: 158mm Snow: 2mm Apr Precipitation: 194mm Snow: 1mm May Precipitation: 228mm Snow: 0mm Jun Precipitation: 369mm Snow: 0mm Jul Precipitation: 420mm Snow: 0mm Aug Precipitation: 277mm Snow: 0mm Sep Precipitation: 333mm Snow: 0mm Oct Precipitation: 200mm Snow: 0mm Nov Precipitation: 113mm Snow: 0mm Dec Precipitation: 80mm Snow: 3mm
Precipitation
Snow

Motoyama is a very wet location, receiving approximately 2548mm of precipitation annually, which averages out to around 212mm per month. The wettest month is July, averaging 420mm of rainfall. June and September also tend to see above-average precipitation. The driest month is January, with just 78mm. That's 341mm less than July, 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 19cm 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: 12km/h Feb Wind Speed: 12km/h Mar Wind Speed: 12km/h Apr Wind Speed: 11km/h May Wind Speed: 10km/h Jun Wind Speed: 9km/h Jul Wind Speed: 9km/h Aug Wind Speed: 9km/h Sep Wind Speed: 9km/h Oct Wind Speed: 10km/h Nov Wind Speed: 10km/h Dec Wind Speed: 11km/h
Wind Speed

Motoyama is relatively calm, with an average annual wind speed of 10km/h. For context, sustained winds below 12km/h are generally light, while anything above 25km/h is considered strong. The windiest month is January, averaging 12km/h, though still comfortable for most outdoor activities. The calmest conditions occur in June, with average winds dropping to 9km/h, making it an ideal period for wind-sensitive activities. There is moderate seasonal variation in wind speed, with a 3km/h gap 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 12km/h in winter, 11km/h in spring, 9km/h in summer, 9km/h in autumn.

Seasons

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

88 days until Summer

It is currently spring in Motoyama, which began on March 20, 2026. Motoyama 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 — 88 days from now.

Spring

Temperatures range from 5 to 22°C. Rainfall is heavy, totalling around 580mm across the season with a monthly average of 193mm. Winds are generally light, averaging 11km/h. An umbrella or waterproof jacket is advisable as spring showers are frequent.

Summer

Temperatures range from 18 to 30°C. Rainfall is heavy, totalling around 1067mm across the season with a monthly average of 356mm. Winds are generally light, averaging 9km/h. Light, breathable clothing is ideal — perfect conditions for outdoor activities.

Autumn

Temperatures range from 8 to 27°C. Rainfall is heavy, totalling around 646mm across the season with a monthly average of 215mm. Winds are generally light, averaging 9km/h. A waterproof jacket and sturdy footwear are recommended as rain becomes more frequent.

Winter

Temperatures range from 1 to 10°C. Precipitation is moderate at around 255mm for the season, averaging 85mm per month. Expect around 16cm of snow accumulation during this period. Winds are generally light, averaging 12km/h. A light jacket or sweater is usually sufficient, though cooler evenings may call for an extra layer.

Monthly Climate Data

The table below shows monthly climate averages for Motoyama 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
12 km/h
78 mm
8 cm
Feb
1 °C
9 °C
12 km/h
97 mm
5 cm
Mar Current
5 °C
14 °C
12 km/h
158 mm
2 cm
Apr
9 °C
18 °C
11 km/h
194 mm
1 cm
May
14 °C
22 °C
10 km/h
228 mm
0 cm
Jun
18 °C
25 °C
9 km/h
369 mm
0 cm
Jul
23 °C
29 °C
9 km/h
420 mm
0 cm
Aug
23 °C
30 °C
9 km/h
277 mm
0 cm
Sep
20 °C
27 °C
9 km/h
333 mm
0 cm
Oct
13 °C
22 °C
10 km/h
200 mm
0 cm
Nov
8 °C
16 °C
10 km/h
113 mm
0 cm
Dec
2 °C
10 °C
11 km/h
80 mm
3 cm
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Metric (°C, km/h)