Climate Insights for Iwami Airport

Masuda Shi, Shimane-ken, Japan

Hottest
August
28°C peak
Coldest
February
6°C low
Wettest
July
247mm rain
Best to Visit
Varies throughout year

Climate Overview

The climate in Iwami Airport is temperate. The average annual temperature is 17°C and approximately 1870mm of precipitation falls per year. Iwami Airport receives a notable amount of rainfall throughout the year, including during its driest month. Iwami Airport 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 February, January, December, when temperatures can drop to 6°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: 9° Average: 7° Min: 6° Feb Max: 9° Average: 8° Min: 6° Mar Max: 12° Average: 11° Min: 9° Apr Max: 16° Average: 14° Min: 13° May Max: 20° Average: 18° Min: 17° Jun Max: 23° Average: 21° Min: 20° Jul Max: 27° Average: 26° Min: 25° Aug Max: 28° Average: 27° Min: 26° Sep Max: 25° Average: 24° Min: 23° Oct Max: 20° Average: 19° Min: 18° Nov Max: 16° Average: 15° Min: 13° Dec Max: 11° Average: 10° Min: 8°
Max
Average
Min

Temperatures in Iwami Airport 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 28°C and the mean temperature sits around 27°C. February is the coolest month, with minimum temperatures around 6°C and an average of 8°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 Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Jan Precipitation: 138mm Snow: 18mm Feb Precipitation: 112mm Snow: 9mm Mar Precipitation: 134mm Snow: 1mm Apr Precipitation: 149mm Snow: 0mm May Precipitation: 128mm Snow: 0mm Jun Precipitation: 196mm Snow: 0mm Jul Precipitation: 247mm Snow: 0mm Aug Precipitation: 201mm Snow: 0mm Sep Precipitation: 208mm Snow: 0mm Oct Precipitation: 109mm Snow: 0mm Nov Precipitation: 108mm Snow: 0mm Dec Precipitation: 141mm Snow: 7mm
Precipitation
Snow

Iwami Airport is a fairly wet location, receiving approximately 1870mm of precipitation annually, which averages out to around 156mm per month. The wettest month is July, averaging 247mm of rainfall. September and August also tend to see above-average precipitation. The driest month is November, with just 108mm. That's 139mm less than July, the wettest month. Rainfall is relatively evenly distributed throughout the year, so there is no pronounced dry or wet season to plan around. Light snowfall can occur between January and December, totalling around 35cm annually. January is the snowiest month with approximately 18cm.

Wind

0km/h 5km/h 10km/h 15km/h 20km/h 25km/h 30km/h Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Jan Wind Speed: 30km/h Feb Wind Speed: 29km/h Mar Wind Speed: 28km/h Apr Wind Speed: 27km/h May Wind Speed: 24km/h Jun Wind Speed: 22km/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: 30km/h
Wind Speed

Iwami Airport 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 30km/h, noticeable enough to affect lighter outdoor activities. The calmest conditions occur in June, with average winds dropping to 22km/h, making it an ideal period for wind-sensitive activities. Wind conditions are fairly consistent throughout the year, varying by only 8km/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 29km/h in winter, 26km/h in spring, 22km/h in summer, 25km/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 Iwami Airport, which began on March 20, 2026. Iwami Airport 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 28°C, while the coldest stretch bottoms out in February near 6°C. Summer is next, beginning on June 21, 2026 — 89 days from now.

Spring

Temperatures range from 9 to 20°C. Rainfall is heavy, totalling around 411mm across the season with a monthly average of 137mm. Winds are strong, averaging 26km/h. An umbrella or waterproof jacket is advisable as spring showers are frequent.

Summer

Temperatures range from 20 to 28°C. Rainfall is heavy, totalling around 643mm across the season with a monthly average of 214mm. Winds are moderate at around 22km/h. Light, breathable clothing is ideal — perfect conditions for outdoor activities.

Autumn

Temperatures range from 13 to 25°C. Rainfall is heavy, totalling around 425mm across the season with a monthly average of 142mm. Winds are strong, averaging 25km/h. A waterproof jacket and sturdy footwear are recommended as rain becomes more frequent.

Winter

Temperatures range from 6 to 11°C. Rainfall is heavy, totalling around 390mm across the season with a monthly average of 130mm. Expect around 34cm of snow accumulation during this period. Winds are strong, averaging 29km/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 Iwami Airport 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
6 °C
9 °C
30 km/h
138 mm
18 cm
Feb
6 °C
9 °C
29 km/h
112 mm
9 cm
Mar Current
9 °C
12 °C
28 km/h
134 mm
1 cm
Apr
13 °C
16 °C
27 km/h
149 mm
0 cm
May
17 °C
20 °C
24 km/h
128 mm
0 cm
Jun
20 °C
23 °C
22 km/h
196 mm
0 cm
Jul
25 °C
27 °C
22 km/h
247 mm
0 cm
Aug
26 °C
28 °C
22 km/h
201 mm
0 cm
Sep
23 °C
25 °C
24 km/h
208 mm
0 cm
Oct
18 °C
20 °C
25 km/h
109 mm
0 cm
Nov
13 °C
16 °C
26 km/h
108 mm
0 cm
Dec
8 °C
11 °C
30 km/h
141 mm
7 cm
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Metric (°C, km/h)