Climate Insights for Aki

Aki Shi, Kochi Prefecture, Japan

Hottest
August
30°C peak
Coldest
January
5°C low
Wettest
July
369mm rain
Best to Visit
Varies throughout year

Climate Overview

The climate in Aki is temperate. The average annual temperature is 18°C and approximately 2301mm 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 5°C.

Temperature

10° 15° 20° 25° 30° Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Jan Max: 11° Average: 8° Min: 5° Feb Max: 12° Average: 8° Min: 6° Mar Max: 15° Average: 12° Min: 9° Apr Max: 19° Average: 16° Min: 13° May Max: 22° Average: 20° Min: 17° Jun Max: 25° Average: 23° Min: 21° Jul Max: 28° Average: 26° Min: 25° Aug Max: 30° Average: 28° Min: 26° Sep Max: 28° Average: 25° Min: 23° Oct Max: 23° Average: 20° Min: 18° Nov Max: 18° Average: 15° Min: 13° Dec Max: 13° Average: 10° Min: 7°
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 30°C and the mean temperature sits around 28°C. January is the coolest month, with minimum temperatures around 5°C and an average of 8°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: 66mm Feb Precipitation: 88mm Mar Precipitation: 147mm Apr Precipitation: 188mm May Precipitation: 231mm Jun Precipitation: 350mm Jul Precipitation: 369mm Aug Precipitation: 277mm Sep Precipitation: 258mm Oct Precipitation: 154mm Nov Precipitation: 100mm Dec Precipitation: 70mm
Precipitation

Aki is a very wet location, receiving approximately 2301mm of precipitation annually, which averages out to around 192mm per month. The wettest month is July, averaging 369mm of rainfall. June and August also tend to see above-average precipitation. The driest month is January, with just 66mm. That's 303mm 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.

Wind

0km/h 5km/h 10km/h 15km/h 20km/h Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Jan Wind Speed: 17km/h Feb Wind Speed: 16km/h Mar Wind Speed: 17km/h Apr Wind Speed: 17km/h May Wind Speed: 15km/h Jun Wind Speed: 15km/h Jul Wind Speed: 14km/h Aug Wind Speed: 14km/h Sep Wind Speed: 14km/h Oct Wind Speed: 14km/h Nov Wind Speed: 14km/h Dec Wind Speed: 16km/h
Wind Speed

Aki is mildly breezy, with an average annual wind speed of 15km/h. For context, sustained winds below 12km/h are generally light, while anything above 25km/h is considered strong. The windiest month is March, averaging 17km/h, though still comfortable for most outdoor activities. The calmest conditions occur in November, with average winds dropping to 14km/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.

Seasons

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

90 days until Summer

It is currently spring in Aki, which began on March 20, 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 30°C, while the coldest stretch bottoms out in January near 5°C. Summer is next, beginning on June 21, 2026 — 90 days from now.

Spring

Temperatures range from 9 to 22°C. Rainfall is heavy, totalling around 567mm across the season with a monthly average of 189mm. Winds are moderate at around 16km/h. An umbrella or waterproof jacket is advisable as spring showers are frequent.

Summer

Temperatures range from 21 to 30°C. Rainfall is heavy, totalling around 997mm across the season with a monthly average of 332mm. Winds are generally light, averaging 14km/h. Light, breathable clothing is ideal — perfect conditions for outdoor activities.

Autumn

Temperatures range from 13 to 28°C. Rainfall is heavy, totalling around 513mm across the season with a monthly average of 171mm. Winds are generally light, averaging 14km/h. A waterproof jacket and sturdy footwear are recommended as rain becomes more frequent.

Winter

Temperatures range from 5 to 13°C. Precipitation is moderate at around 224mm for the season, averaging 75mm per month. Winds are moderate at around 16km/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
5 °C
11 °C
17 km/h
66 mm
0 cm
Feb
6 °C
12 °C
16 km/h
88 mm
0 cm
Mar Current
9 °C
15 °C
17 km/h
147 mm
0 cm
Apr
13 °C
19 °C
17 km/h
188 mm
0 cm
May
17 °C
22 °C
15 km/h
231 mm
0 cm
Jun
21 °C
25 °C
15 km/h
350 mm
0 cm
Jul
25 °C
28 °C
14 km/h
369 mm
0 cm
Aug
26 °C
30 °C
14 km/h
277 mm
0 cm
Sep
23 °C
28 °C
14 km/h
258 mm
0 cm
Oct
18 °C
23 °C
14 km/h
154 mm
0 cm
Nov
13 °C
18 °C
14 km/h
100 mm
0 cm
Dec
7 °C
13 °C
16 km/h
70 mm
0 cm
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Metric (°C, km/h)