See exactly when rain will start and stop with a minute-by-minute precipitation nowcast for the next hour.
24°
Mostly Cloudy
Feels Like: 24°
Min: 24°
Max: 27°
The next few hours will be overcast, with today reaching 27°C and dropping to 23°C. The coming days will be light rain throughout the day.
Compare today's weather with yesterday's data and track temperature trends over time.
Hourly Forecast
Daylight Hours
05:59
Sunrise
17:58
Sunset
Moon
Waxing Gibbous
15:04
Moonrise
01:06
Moonset
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View stargazing scoreWeather in Niihama today, September 21, 2026
Niihama stays under cloudy skies on September 21, 2026, with only brief brighter breaks. Plan for a day that feels grey more often than open. Expect a grey start, with morning cloud around 88% by 06:00. Outdoor plans early on should not rely on bright skies.
Temperatures climb from an overnight low near 24°C toward a daytime high of about 27°C. Moisture in the air spans 61%-76%, with the highest values around 06:00. Expect gentle winds, highest near 18:00 at 5.1 km/h.
Afternoon skies stay clogged, peaking close to 76% near 12:00. The grey theme continues rather than clearing out. Expect visibility around 16.1 km. The sun rises at 05:59 and sets at 17:58, for a total of 11 hours 58 minutes of sunlight today.
Taken together, overcast skies in Niihama on September 21, 2026 favour indoor or covered options, with temperatures near 27°C.
Frequently asked questions about weather in Niihama
How warm does it get in Niihama?
The warmest month in Niihama is August, with average high temperatures of 30°C. The average temperature during this period is around 28°C.
How cold does it get in Niihama?
The coldest month in Niihama is January, with average low temperatures of 3°C. The average temperature during this period is around 5°C.
What is the wettest time of year in Niihama?
The wettest month in Niihama is June, with an average of 265mm of precipitation.
What is the driest time of year in Niihama?
The driest month in Niihama is December, with an average of 71mm of precipitation.
