Climate Insights for Aki

Aki Shi, Kochi Prefecture, Japan

Hottest
August
29°C peak
Coldest
January
4°C low
Wettest
June
370mm rain
Best to Visit
Varies throughout year

Climate Overview

The climate in Aki is temperate. The average annual temperature is 17°C and approximately 2547mm of precipitation falls per year. Aki receives a notable amount of rainfall throughout the year, including during its driest month. Aki 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 4°C.

Temperature

10° 15° 20° 25° 30° Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Jan Max: 10° Average: 7° Min: 4° Feb Max: 11° Average: 7° Min: 5° Mar Max: 14° Average: 11° Min: 8° Apr Max: 18° Average: 15° Min: 12° May Max: 21° Average: 19° Min: 16° Jun Max: 24° Average: 22° Min: 20° Jul Max: 28° Average: 26° Min: 24° Aug Max: 29° Average: 27° Min: 25° Sep Max: 27° Average: 25° Min: 23° Oct Max: 23° Average: 20° Min: 17° Nov Max: 17° Average: 14° Min: 11° Dec Max: 12° Average: 9° Min: 6°
Max
Average
Min

Temperatures in Aki vary considerably across the year, with a 25°C difference between the coldest and warmest months. The warmest month is August, when average highs reach 29°C and the mean temperature sits around 27°C. January is the coolest month, with minimum temperatures around 4°C and an average of 7°C. Daily temperature variation is modest, with an average difference of 5°C between highs and lows. The sharpest temperature change occurs between November and December, with a 5°C shift in average temperatures.

Precipitation

0mm 50mm 100mm 150mm 200mm 250mm 300mm 350mm 400mm Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Jan Precipitation: 73mm Snow: 3mm Feb Precipitation: 100mm Snow: 1mm Mar Precipitation: 173mm Snow: 0mm Apr Precipitation: 212mm Snow: 0mm May Precipitation: 287mm Snow: 0mm Jun Precipitation: 370mm Snow: 0mm Jul Precipitation: 358mm Snow: 0mm Aug Precipitation: 313mm Snow: 0mm Sep Precipitation: 295mm Snow: 0mm Oct Precipitation: 207mm Snow: 0mm Nov Precipitation: 98mm Snow: 0mm Dec Precipitation: 62mm Snow: 0mm
Precipitation
Snow

Aki is a very wet location, receiving approximately 2547mm of precipitation annually, which averages out to around 212mm per month. The wettest month is June, averaging 370mm of rainfall. July and August also tend to see above-average precipitation. The driest month is December, with just 62mm. That's 308mm 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.

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: 11km/h Apr Wind Speed: 10km/h May Wind Speed: 9km/h Jun Wind Speed: 9km/h Jul Wind Speed: 9km/h Aug Wind Speed: 10km/h Sep Wind Speed: 10km/h Oct Wind Speed: 11km/h Nov Wind Speed: 10km/h Dec Wind Speed: 11km/h
Wind Speed

Aki 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 February, averaging 12km/h, though still comfortable for most outdoor activities. The calmest conditions occur in July, with average winds dropping to 9km/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 11km/h in winter, 10km/h in spring, 9km/h in summer, 10km/h in autumn.

Seasons

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

3 days until Autumn

It is currently summer in Aki, which began on June 21, 2026. Aki 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 29°C, while the coldest stretch bottoms out in January near 4°C. Autumn is next, beginning on September 23, 2026 (3 days from now).

Spring

Temperatures range from 8 to 21°C. Rainfall is heavy, totalling around 671mm across the season with a monthly average of 224mm. Winds are generally light, averaging 10km/h. An umbrella or waterproof jacket is advisable as spring showers are frequent.

Summer

Temperatures range from 20 to 29°C. Rainfall is heavy, totalling around 1041mm across the season with a monthly average of 347mm. Winds are generally light, averaging 9km/h. Light, breathable clothing is ideal. Perfect conditions for outdoor activities.

Autumn

Temperatures range from 11 to 27°C. Rainfall is heavy, totalling around 599mm across the season with a monthly average of 200mm. Winds are generally light, averaging 10km/h. A waterproof jacket and sturdy footwear are recommended as rain becomes more frequent.

Winter

Temperatures range from 4 to 12°C. Precipitation is moderate at around 236mm for the season, averaging 79mm per month. Winds are generally light, averaging 11km/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 Aki 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. 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
4 °C
10 °C
12 km/h
73 mm
3 cm
Feb
5 °C
11 °C
12 km/h
100 mm
1 cm
Mar
8 °C
14 °C
11 km/h
173 mm
0 cm
Apr
12 °C
18 °C
10 km/h
212 mm
0 cm
May
16 °C
21 °C
9 km/h
287 mm
0 cm
Jun
20 °C
24 °C
9 km/h
370 mm
0 cm
Jul
24 °C
28 °C
9 km/h
358 mm
0 cm
Aug
25 °C
29 °C
10 km/h
313 mm
0 cm
Sep Current
23 °C
27 °C
10 km/h
295 mm
0 cm
Oct
17 °C
23 °C
11 km/h
207 mm
0 cm
Nov
11 °C
17 °C
10 km/h
98 mm
0 cm
Dec
6 °C
12 °C
11 km/h
62 mm
0 cm
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Metric (°C, km/h)