The climate in Niihama during May can be summarized as mild and wet.
May is in the spring in Niihama and is typically the 5th warmest month of the year. Daytime maximum temperatures average around 21°C (70°F), whilst at night 12°C (54°F) is normal.
|Daytime temperature||21.2°C 70.2°F|
|Nightly temperature||12.2°C 54°F|
|Average temperature||16.7°C 62.1°F|
|Daily sunshine||6.6 hrs|
|Avg rainfall||180 mm 7.1 ins|
|Rainy days||15 days|
|Sea temperature||20.2°C 68.3°F|
|Windspeed||9.7kph 6 mph|
On average May is the 5th wettest month of the year in Niihama with around 180mm 7.1 inches of rain making it a wet time to visit. This rainfall is typically spread over 15 days, although this may vary considerably.
On the flip side this corresponds to an average of 6.6 hours of sunshine per day.
The data used in these monthly averages covers a period of over 100 years right up until last year. As such they are a valid prediction of what to expect for the weather in Niihama in May 2022.
|Hottest month:||August||29.2°C 84.6°F|
|Driest month:||December||33mm 1.3ins|
|Coldest month:||January||6.9°C 44.4°F|
|Wettest month:||June||291mm 11.5ins|