Climate Insights for Asso

Nishimuro-gun, Wakayama, Japan

Hottest
August
30°C peak
Coldest
January
4°C low
Wettest
June
380mm rain
Best to Visit
Varies throughout year

Climate Overview

The climate in Asso is temperate. The average annual temperature is 16°C and approximately 2418mm of precipitation falls per year. Asso receives a notable amount of rainfall throughout the year, including during its driest month. Asso 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: 9° Average: 6° Min: 4° Feb Max: 10° Average: 7° Min: 4° Mar Max: 14° Average: 10° Min: 7° Apr Max: 18° Average: 15° Min: 12° May Max: 22° Average: 19° Min: 16° Jun Max: 24° Average: 22° Min: 19° Jul Max: 28° Average: 26° Min: 24° Aug Max: 30° Average: 27° Min: 25° Sep Max: 27° Average: 24° Min: 22° Oct Max: 22° Average: 19° Min: 16° Nov Max: 17° Average: 14° Min: 11° Dec Max: 11° Average: 8° Min: 6°
Max
Average
Min

Temperatures in Asso vary considerably across the year, with a 26°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 27°C. January is the coolest month, with minimum temperatures around 4°C and an average of 6°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: 90mm Snow: 3mm Feb Precipitation: 109mm Snow: 1mm Mar Precipitation: 165mm Snow: 0mm Apr Precipitation: 195mm Snow: 0mm May Precipitation: 231mm Snow: 0mm Jun Precipitation: 380mm Snow: 0mm Jul Precipitation: 335mm Snow: 0mm Aug Precipitation: 252mm Snow: 0mm Sep Precipitation: 240mm Snow: 0mm Oct Precipitation: 209mm Snow: 0mm Nov Precipitation: 127mm Snow: 0mm Dec Precipitation: 85mm Snow: 0mm
Precipitation
Snow

Asso is a very wet location, receiving approximately 2418mm of precipitation annually, which averages out to around 202mm per month. The wettest month is June, averaging 380mm of rainfall. July and August also tend to see above-average precipitation. The driest month is December, with just 85mm. That's 295mm 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 Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Jan Wind Speed: 23km/h Feb Wind Speed: 22km/h Mar Wind Speed: 21km/h Apr Wind Speed: 20km/h May Wind Speed: 18km/h Jun Wind Speed: 18km/h Jul Wind Speed: 16km/h Aug Wind Speed: 16km/h Sep Wind Speed: 17km/h Oct Wind Speed: 18km/h Nov Wind Speed: 19km/h Dec Wind Speed: 22km/h
Wind Speed

Asso is mildly breezy, with an average annual wind speed of 19km/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 23km/h, noticeable enough to affect lighter outdoor activities. The calmest conditions occur in July, with average winds dropping to 16km/h, making it an ideal period for wind-sensitive activities. There is moderate seasonal variation in wind speed, with a 7km/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 23km/h in winter, 20km/h in spring, 17km/h in summer, 18km/h in autumn.

Seasons

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

89 days until Summer

It is currently spring in Asso, which began on March 20, 2026. Asso 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 4°C. Summer is next, beginning on June 21, 2026 — 89 days from now.

Spring

Temperatures range from 7 to 22°C. Rainfall is heavy, totalling around 590mm across the season with a monthly average of 197mm. Winds are moderate at around 20km/h. An umbrella or waterproof jacket is advisable as spring showers are frequent.

Summer

Temperatures range from 19 to 30°C. Rainfall is heavy, totalling around 967mm across the season with a monthly average of 322mm. Winds are moderate at around 17km/h. Light, breathable clothing is ideal — perfect conditions for outdoor activities.

Autumn

Temperatures range from 11 to 27°C. Rainfall is heavy, totalling around 577mm across the season with a monthly average of 192mm. Winds are moderate at around 18km/h. A waterproof jacket and sturdy footwear are recommended as rain becomes more frequent.

Winter

Temperatures range from 4 to 11°C. Precipitation is moderate at around 284mm for the season, averaging 95mm per month. Winds are moderate at around 23km/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 Asso 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
9 °C
23 km/h
90 mm
3 cm
Feb
4 °C
10 °C
22 km/h
109 mm
1 cm
Mar Current
7 °C
14 °C
21 km/h
165 mm
0 cm
Apr
12 °C
18 °C
20 km/h
195 mm
0 cm
May
16 °C
22 °C
18 km/h
231 mm
0 cm
Jun
19 °C
24 °C
18 km/h
380 mm
0 cm
Jul
24 °C
28 °C
16 km/h
335 mm
0 cm
Aug
25 °C
30 °C
16 km/h
252 mm
0 cm
Sep
22 °C
27 °C
17 km/h
240 mm
0 cm
Oct
16 °C
22 °C
18 km/h
209 mm
0 cm
Nov
11 °C
17 °C
19 km/h
127 mm
0 cm
Dec
6 °C
11 °C
22 km/h
85 mm
0 cm
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Metric (°C, km/h)