See exactly when rain will start and stop with a minute-by-minute precipitation nowcast for the next hour.
Compare today's weather with yesterday's data and track temperature trends over time.
Hourly Forecast
Daylight Hours
05:33
Sunrise
17:32
Sunset
Moon
Waxing Gibbous
14:45
Moonrise
00:33
Moonset
Daily Forecast
Monday
Tuesday
Wednesday
Thursday
Friday
Saturday
Sunday
Monday
Tuesday
Wednesday
Air Quality Data Available
Upgrade to access real-time air quality data for Oyama.
Resources
UV Index
Humidity
Current stargazing conditions?
See sky darkness, moon phase, and the best viewing window for Oyama.
View stargazing scoreWeather in Oyama today, September 21, 2026
Expect unsettled, showery conditions in Oyama on September 21, 2026 as rain moves through. The day opens on a wet note and needs flexible outdoor plans. Morning plans should assume damp conditions, as rain chances climb toward 100% around 07:00. Cloud cover is also at its densest near 06:00 at roughly 100%.
Expect highs of 24°C and cooler readings close to 21°C. The air stays humid, with relative humidity between 88% and 96% and the peak around 14:00. Expect gentle winds, highest near 21:00 at 7.4 km/h.
Through the afternoon wet weather remains a factor, with rain chances near 100% around 12:00. Cloud also stays substantial, close to 100% near 12:00. Horizontal visibility sits around 6.3 km, briefly nearer 1.5 km. Sunrise is at 05:33 and sunset at 17:32, giving 11 hours 58 minutes of sunlight today.
The practical takeaway for Oyama on September 21, 2026 is simple: plan for rain, keep layers handy, and work around a high of about 24°C.
Frequently asked questions about weather in Oyama
How warm does it get in Oyama?
The warmest month in Oyama is August, with average high temperatures of 32°C. The average temperature during this period is around 28°C.
How cold does it get in Oyama?
The coldest month in Oyama is January, with average low temperatures of 0°C. The average temperature during this period is around 4°C.
What is the wettest time of year in Oyama?
The wettest month in Oyama is July, with an average of 209mm of precipitation.
What is the driest time of year in Oyama?
The driest month in Oyama is December, with an average of 42mm of precipitation.
