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Iwaki

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Iwaki Weather, Climate and Best Time to Visit

Data source：Meteostat
Update date：2025-09

Iwaki year round climate

  • Spring (March–May): 47–62°F on average, mild climate but with relatively high rainfall, especially in April and May. Common activities: Hiking, flower viewing. Recommended clothing: Light jacket, comfortable long-sleeved clothing.
  • Summer (June–August): 69–79°F on average, hot and humid, but with relatively low rainfall. Common activities: Swimming at the beach, outdoor activities. Recommended clothing: Light and breathable short-sleeved clothing, shorts, sun hat.
  • Autumn (September–November): 64–75°F on average, pleasant climate, but September has the most rainfall. Common activities: Autumn leaves viewing, outdoor excursions. Recommended clothing: Comfortable long-sleeved clothing, light jacket.
  • Winter (December–February): 40–44°F on average, cold and dry, with low rainfall. Common activities: Hot spring bathing, indoor activities. Recommended clothing: Warm jacket, sweater, scarf, gloves.

Iwaki climatological average

Annual average temperature: approx. 59.0°F / Annual rainfall: approx. 1431 mm / Summer humidity: 70%–80% / Rainiest month: September

Iwaki monthly average temperature and precipitation

Month
Air temperature (°F)
Precipitation (mm)
January
40.1°F
52
February
41.2°F
45.5
March
47.5°F
142.3
April
56.8°F
123
May
62.8°F
172.1
June
69.8°F
155.8
July
78.1°F
114.5
August
79.9°F
101.8
September
75.7°F
265.5
October
64.2°F
120.4
November
55.2°F
106.3
December
44.2°F
32.5

Iwaki weather for the next seven days

4/8
Wednesday
Sunny
56.4°F/42°F
4/9
Thursday
Sunny
63.2°F/44.2°F
4/10
Friday
Patchy rain nearby
59.8°F/55.4°F
4/11
Saturday
Sunny
66.8°F/54.5°F
4/12
Sunday
Sunny
69.2°F/48.9°F
4/13
Monday
Overcast
68.4°F/52.9°F
4/14
Tuesday
Patchy rain nearby
59.7°F/51.4°F

Iwaki Frequently Asked Questions and Useful Information for Travel

What is Iwaki famous for?

Iwaki is renowned for its paleontological discoveries, most notably the Futabasaurus dinosaur. Visitors can delve into the region's mining history at the Horuru: Iwaki Coal and Fossil Museum.

What does Iwaki mean in Japanese?

In Japanese, Iwaki can be written as 岩井 meaning 'stone well' or 岩居 meaning 'resides in a stony place', both common placenames. The former is found as a surname in western Japan, while the latter is more prevalent in eastern Japan.

Does it snow in Iwaki?

Yes, Iwaki experiences snowfall, transforming the landscape into a snow-covered, white expanse. This winter beauty gradually melts away with the bright spring sunlight, revealing speckled patterns on the mountain surfaces.

What kind of food is Iwaki known for?

A savory summer treat in Iwaki is sea urchin, often cooked in its shell and locally called 'gazze'. Fishermen retrieve purple sea urchins from the sea, clean them, stack them in Sakhalin surf clam shells, and carefully roast them over charcoal on small stones.

What can I learn at the Horuru: Iwaki Coal and Fossil Museum?

The Horuru: Iwaki Coal and Fossil Museum offers insights into Iwaki's rich mining history and its significant fossil discoveries, including the famous Futabasaurus dinosaur.