Climate Insights for Susami

Nishimuro-gun, Wakayama, Japan

Hottest
August
29°C peak
Coldest
January
7°C low
Wettest
June
355mm rain
Best to Visit
Varies throughout year

Climate Overview

The climate in Susami is warm and mild. The average annual temperature is 18°C and approximately 2395mm of precipitation falls per year. Susami receives a notable amount of rainfall throughout the year, including during its driest month. Susami 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 7°C.

Temperature

10° 15° 20° 25° 30° Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Jan Max: 11° Average: 9° Min: 7° Feb Max: 11° Average: 10° Min: 7° Mar Max: 14° Average: 13° Min: 11° Apr Max: 18° Average: 16° Min: 14° May Max: 21° Average: 20° Min: 18° Jun Max: 24° Average: 23° Min: 21° Jul Max: 27° Average: 26° Min: 25° Aug Max: 29° Average: 28° Min: 26° Sep Max: 27° Average: 25° Min: 24° Oct Max: 23° Average: 21° Min: 20° Nov Max: 18° Average: 17° Min: 15° Dec Max: 13° Average: 12° Min: 10°
Max
Average
Min

Temperatures in Susami vary considerably across the year, with a 22°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 28°C. January is the coolest month, with minimum temperatures around 7°C and an average of 9°C. Daily temperature variation is modest, with an average difference of 3°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: 98mm Snow: 1mm Feb Precipitation: 108mm Snow: 0mm Mar Precipitation: 171mm Snow: 0mm Apr Precipitation: 186mm Snow: 0mm May Precipitation: 223mm Snow: 0mm Jun Precipitation: 355mm Snow: 0mm Jul Precipitation: 290mm Snow: 0mm Aug Precipitation: 245mm Snow: 0mm Sep Precipitation: 252mm Snow: 0mm Oct Precipitation: 231mm Snow: 0mm Nov Precipitation: 143mm Snow: 0mm Dec Precipitation: 91mm Snow: 0mm
Precipitation
Snow

Susami is a very wet location, receiving approximately 2395mm of precipitation annually, which averages out to around 200mm per month. The wettest month is June, averaging 355mm of rainfall. July and September also tend to see above-average precipitation. The driest month is December, with just 91mm. That's 264mm less than June, the wettest month. Precipitation varies noticeably between seasons, with the second half (July to December) of the year generally seeing more rainfall.

Wind

0km/h 5km/h 10km/h 15km/h 20km/h 25km/h 30km/h 35km/h Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Jan Wind Speed: 32km/h Feb Wind Speed: 31km/h Mar Wind Speed: 28km/h Apr Wind Speed: 28km/h May Wind Speed: 24km/h Jun Wind Speed: 24km/h Jul Wind Speed: 22km/h Aug Wind Speed: 22km/h Sep Wind Speed: 24km/h Oct Wind Speed: 25km/h Nov Wind Speed: 26km/h Dec Wind Speed: 31km/h
Wind Speed

Susami is moderately windy, with an average annual wind speed of 26km/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 32km/h, which can feel quite blustery and may affect outdoor activities. The calmest conditions occur in July, with average winds dropping to 22km/h, making it an ideal period for wind-sensitive activities. There is moderate seasonal variation in wind speed, with a 10km/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 31km/h in winter, 27km/h in spring, 23km/h in summer, 25km/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 Susami, which began on March 20, 2026. Susami 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 7°C. Summer is next, beginning on June 21, 2026 — 87 days from now.

Spring

Temperatures range from 11 to 21°C. Rainfall is heavy, totalling around 581mm across the season with a monthly average of 194mm. Winds are strong, averaging 27km/h. An umbrella or waterproof jacket is advisable as spring showers are frequent.

Summer

Temperatures range from 21 to 29°C. Rainfall is heavy, totalling around 890mm across the season with a monthly average of 297mm. Winds are moderate at around 23km/h. Light, breathable clothing is ideal — perfect conditions for outdoor activities.

Autumn

Temperatures range from 15 to 27°C. Rainfall is heavy, totalling around 626mm across the season with a monthly average of 209mm. Winds are strong, averaging 25km/h. A waterproof jacket and sturdy footwear are recommended as rain becomes more frequent.

Winter

Temperatures range from 7 to 13°C. Precipitation is moderate at around 298mm for the season, averaging 99mm per month. Winds are strong, averaging 31km/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 Susami 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
7 °C
11 °C
32 km/h
98 mm
1 cm
Feb
7 °C
11 °C
31 km/h
108 mm
0 cm
Mar Current
11 °C
14 °C
28 km/h
171 mm
0 cm
Apr
14 °C
18 °C
28 km/h
186 mm
0 cm
May
18 °C
21 °C
24 km/h
223 mm
0 cm
Jun
21 °C
24 °C
24 km/h
355 mm
0 cm
Jul
25 °C
27 °C
22 km/h
290 mm
0 cm
Aug
26 °C
29 °C
22 km/h
245 mm
0 cm
Sep
24 °C
27 °C
24 km/h
252 mm
0 cm
Oct
20 °C
23 °C
25 km/h
231 mm
0 cm
Nov
15 °C
18 °C
26 km/h
143 mm
0 cm
Dec
10 °C
13 °C
31 km/h
91 mm
0 cm
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Metric (°C, km/h)