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
05:32
Sunrise
17:31
Sunset
Moon
Waxing Gibbous
14:43
Moonrise
00:32
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 Tsukuba.
Resources
UV Index
Humidity
Current stargazing conditions?
See sky darkness, moon phase, and the best viewing window for Tsukuba.
View stargazing scoreWeather in Tsukuba today, September 21, 2026
Tsukuba looks damp on September 21, 2026, so plan for wet spells during the day. Early travel and outdoor time should assume rain can arrive quickly. Early hours look the most unsettled, with rain probability near 100% by 07:00. The thickest cloud arrives around 07:00, reaching about 100%.
Temperatures climb from an overnight low near 21°C toward a daytime high of about 25°C. Relative humidity sits between 87% and 98%, reaching its peak around 09:00. Winds stay light, near 7.9 km/h by 23:00, so the day feels still more than breezy.
Afternoon showers stay in play, peaking near 100% around 12:00. Skies remain cluttered, with cover about 100% by 12:00. Horizontal visibility sits around 4.7 km, briefly nearer 0.8 km. Expect sunrise at 05:32, sunset at 17:31, and 11 hours 58 minutes of sunlight today overall.
Overall, Tsukuba on September 21, 2026 suits indoor plans or waterproof kit, especially while rain chances stay near 100% and the high sits around 25°C.
Frequently asked questions about weather in Tsukuba
How warm does it get in Tsukuba?
The warmest month in Tsukuba 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 Tsukuba?
The coldest month in Tsukuba 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 Tsukuba?
The wettest month in Tsukuba is June, with an average of 174mm of precipitation.
What is the driest time of year in Tsukuba?
The driest month in Tsukuba is December, with an average of 46mm of precipitation.
