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      Thunderstorm Advisory
      until 12:00 AM JST
      +3 more alerts
      Elev 15 ft, 35.659 °N 139.773 °E

      Koutou-ku, JP

      Tokyo Heliport Station73°
      Updated: 5:30 PM JST on September 21, 2026 (GMT +9)
      7 minutes ago
      78°
      70°
      73
      Feels Like 73
      Heavy Rain
      N
      17
      Gusts 32 mph
      Higher temperature is expected tomorrow
      50
      50
      575
      90
      50
      7
      0 mph
      50
      50
      50
      50
      50
      50
      Radar · Now
        Hyper-local data from Weather Underground's network of
        400,000+ personal weather stations worldwide
        Tonight
        Mon 09/21
        Low 72°f
         100% Precip. / 2.52 in
        Cloudy and windy with a soaking rain early...then becoming partly cloudy. Low 72F. NNW winds at 25 to 35 mph, decreasing to 10 to 15 mph. Chance of rain 100%. 2 to 3 inches of rain expected. Locally heavy rainfall possible.
        Tomorrow
        Tue 09/22
        High 85°f
         61% Precip. / 0.05 in
        Partly cloudy early followed by increasing clouds with showers developing later in the day. High near 85F. Winds N at 5 to 10 mph. Chance of rain 60%.
        Tomorrow night
        Tue 09/22
        Low 70°f
         48% Precip. / 0.05 in
        Occasional light rain. Low around 70F. Winds ENE at 5 to 10 mph. Chance of rain 50%.
        Hourly Forecast
        Now
        73°
        5:39PM
        Sunset
        6PM
        98%
        73°
        7PM
        96%
        73°
        8PM
        60%
        74°
        9PM
        58%
        75°
        10PM
        76°
        11PM
        76°
        12AM
        77°
        1AM
        77°
        2AM
        77°
        3AM
        77°
        4AM
        77°
        5AM
        77°
        5:28AM
        Sunrise
        6AM
        77°
        7AM
        78°
        8AM
        80°
        9AM
        82°
        10AM
        83°
        11AM
        84°
        12PM
        85°
        1PM
        85°
        2PM
        84°
        3PM
        84°
        4PM
        35%
        83°
        5PM
        59%
        81°
        Precipitation
        98%
        Rain continuing through 9 PM
        Pollen
        Ragweed Pollen
        Low
        Air Quality
        11
        Good
        UV Index
        0
        Low
        Additional Conditions
        1. Pressure 29.37 in
        2. Visibility 0.59 miles
        3. Clouds Cloudy
        4. Dew Point73°F
        5. Humidity 100%
        6. Rainfall 10.95 in
        7. Snow Depth 0 in
         RJTI Station History
        Almanac for September 21, 2026
        1. Forecast Average Record
        2. Temperature
        3. High 78°F 80°F 91°F 2024
        4. Low 70°F 67°F 60°F 1974
        5. Rain/Snow Depth
        6. Precipitation 2.52 in 0.3 in -
        7. Snow 0 in - in -
        Almanac for September 22, 2026
        1. Forecast Average Record
        2. Temperature
        3. High 85°F 79°F 91°F
        4. Low 70°F 66°F 57°F
        Astronomy
        1. Sun Rise Set
        2. Actual Time 5:27 AM 5:39 PM
        3. Civil Twilight 5:02 AM 6:05 PM
        4. Nautical Twilight 4:32 AM 6:35PM
        5. Astronomical Twilight 4:01 AM 7:05 PM
        1. Length of Visible Light 13h 3m
        2. Length of Day 12h 12m
        3. Tomorrow will be 2 minutes 13 seconds shorter
        1. Moon 2:43 PM -
        2. Waxing Gibbous71% of the Moon is Illuminated
        Sep 27
        Full Moon
        Oct 3
        Waning Half Last Qtr
        Oct 11
        New Moon
        Oct 19
        Waxing Half First Qtr
        Precipitation
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