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🇯🇵 Weather in Tokyo in August
This is what the weather in Tokyo (Japan) was like in August over the years 2017–2026.
Key facts at a glance
Prevailing weather: Light rain
Avg. daytime high
31.6 °C
30.3 °C – 33.2 °C
Avg. night-time low
24.7 °C
23.6 °C – 25.7 °C
Avg. rain days in period
17.9
58 % of days · ≥ 1.0 mm
Avg. precipitation in period
163 mm
33.7 mm – 346 mm
Avg. cloud cover
68 %
This data source has no sunshine hours – average cloud cover is shown instead.
Avg. sea temperature
27.0 °C
Sea temperature available for 2 of 10 years.
Extremes: Highest temperature 36.7 °C (25 Aug 2017) · Lowest temperature 17.9 °C (18 Aug 2018) · Avg. daily peak wind 19 km/h
Weather mix of all days
- 14Sunny
- 79Partly cloudy
- 31Cloudy
- 106Light rain
- 73Rain
Summary
- On average 31.6 °C during the day and 24.7 °C at night.
- On average 17.9 rain days (Rain day = at least 1.0 mm of precipitation) with 163 mm of precipitation in total.
- The sea averaged 27.0 °C.
- Prevailing weather: Light rain.
- Warmest year: 2025 (avg. 33.2 °C), coolest: 2021 (avg. 30.3 °C).
- Wettest year: 2024 (346 mm), driest: 2020 (33.7 mm).
- Extremes: 36.7 °C on 25 Aug 2017 and 17.9 °C on 18 Aug 2018.
Overall values from all 10 years. How is this calculated?
Charts
Temperatures per year
Average over your travel period
Avg. daytime high: 2017 31°, 2018 32°, 2019 32°, 2020 32°, 2021 30°, 2022 31°, 2023 32°, 2024 32°, 2025 33°, 2026 30°. Avg. night-time low: 2017 24°, 2018 24°, 2019 25°, 2020 25°, 2021 24°, 2022 24°, 2023 26°, 2024 26°, 2025 26°, 2026 24°. Sea temperature: 2017 –, 2018 –, 2019 –, 2020 –, 2021 –, 2022 –, 2023 –, 2024 –, 2025 27°, 2026 27°.
Precipitation & rain days
Precipitation (mm): 2017 141, 2018 97, 2019 92, 2020 34, 2021 313, 2022 166, 2023 102, 2024 346, 2025 84, 2026 257.
Year by year
2026
Avg. max30.4°Avg. min23.6°- Rain days
- 24 Rain days
- Precipitation
- 257 mm
- Avg. cloud cover
- –
- Sea temperature
- 26.9 °C
Max 35.7 °C · Min 20.6 °C
2025
Avg. max33.2°Avg. min25.5°- Rain days
- 13 Rain days
- Precipitation
- 84.3 mm
- Avg. cloud cover
- 59 % cloudy
- Sea temperature
- 27.1 °C
Max 36.7 °C · Min 23.4 °C
2024
Avg. max32.3°Avg. min25.7°- Rain days
- 22 Rain days
- Precipitation
- 346 mm
- Avg. cloud cover
- 66 % cloudy
- Sea temperature
- –
Max 34.9 °C · Min 24.1 °C
2023
Avg. max32.2°Avg. min25.5°- Rain days
- 17 Rain days
- Precipitation
- 102 mm
- Avg. cloud cover
- 55 % cloudy
- Sea temperature
- –
Max 34.5 °C · Min 24.4 °C
2022
Avg. max31.0°Avg. min24.3°- Rain days
- 22 Rain days
- Precipitation
- 166 mm
- Avg. cloud cover
- 76 % cloudy
- Sea temperature
- –
Max 36.1 °C · Min 19.9 °C
2021
Avg. max30.3°Avg. min24.3°- Rain days
- 18 Rain days
- Precipitation
- 313 mm
- Avg. cloud cover
- 73 % cloudy
- Sea temperature
- –
Max 34.3 °C · Min 20.5 °C
2020
Avg. max32.4°Avg. min24.6°- Rain days
- 9 Rain days
- Precipitation
- 33.7 mm
- Avg. cloud cover
- 59 % cloudy
- Sea temperature
- –
Max 35.6 °C · Min 21.6 °C
2019
Avg. max31.6°Avg. min25.0°- Rain days
- 17 Rain days
- Precipitation
- 92.1 mm
- Avg. cloud cover
- 73 % cloudy
- Sea temperature
- –
Max 34.6 °C · Min 22.4 °C
2018
Avg. max31.7°Avg. min24.5°- Rain days
- 17 Rain days
- Precipitation
- 97.4 mm
- Avg. cloud cover
- 64 % cloudy
- Sea temperature
- –
Max 36.0 °C · Min 17.9 °C
2017
Avg. max30.8°Avg. min23.7°- Rain days
- 20 Rain days
- Precipitation
- 141 mm
- Avg. cloud cover
- 84 % cloudy
- Sea temperature
- –
Max 36.7 °C · Min 19.1 °C
Frequently asked questions
- How warm is it in Tokyo in August?
- Daytime highs averaged 31.6 °C, night-time lows 24.7 °C. The highest value of the past 10 years was 36.7 °C (25 Aug 2017), the lowest 17.9 °C (18 Aug 2018).
- How often does it rain in Tokyo in August?
- On average there were 17.9 rain days (at least 1 mm) with 163 mm of precipitation in total.
- How warm is the sea in Tokyo in August?
- The sea temperature averaged 27.0 °C (open-sea point approx. 10 km from the town).
Check your exact travel dates
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Other destinations in August
Data sources
- Weather data
- Data obtained from the NASA Langley Research Center (LaRC) POWER Project funded through the NASA Earth Science/Applied Science Program
Reanalysis (weather model constrained by observations) on a coarse grid of about 50 km. Values represent a large area and can differ from local conditions, especially on islands, coasts and in mountains. Snow depth is the model value for the grid cell, not the depth on the slopes. No sunshine duration.
Reanalysis (weather model constrained by observations)
Reanalysis values represent a grid cell (approx. 25–50 km) and may differ from local measurements on coasts, islands and in mountains. - Sea temperature
- MUR SST data were provided by JPL under support by NASA MEaSUREs program; accessed via NOAA CoastWatch ERDDAP
Daily multi-scale ultra-high resolution (≈ 1 km) analysis of satellite measurements (infrared, microwave) and in-situ data. Represents the foundation temperature below the daily warm surface layer. (Satellite and in-situ analysis) - Sea measuring point approx. 10 km from the location (35.600, 139.810)
- Place search
- Natural Earth (public domain) · GeoNames (CC BY 4.0) / OpenStreetMap (ODbL)