How warm is it in Tokyo in January?

Daytime highs averaged 9.7 °C, night-time lows 1.2 °C. The highest value of the past 10 years was 17.9 °C (30 Jan 2017), the lowest -3.4 °C (25 Jan 2023).

How often does it rain in Tokyo in January?

On average there were 4.8 rain days (at least 1 mm) with 50.2 mm of precipitation in total.

How warm is the sea in Tokyo in January?

The sea temperature averaged 15.1 °C (open-sea point approx. 10 km from the town).

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Tokyo weather in January: temperature & rain

Photo: David Kernan · CC BY 4.0

🇯🇵 Weather in Tokyo in January

This is what the weather in Tokyo (Japan) was like in January over the years 2017–2026.

Key facts at a glance

Prevailing weather: Sunny

Avg. daytime high

9.7 °C

8.2 °C – 11.3 °C

Avg. night-time low

1.2 °C

0.2 °C – 3.2 °C

Avg. rain days in period

4.8

15 % of days · ≥ 1.0 mm

Avg. precipitation in period

50.2 mm

12.8 mm – 139 mm

Avg. cloud cover

44 %

This data source has no sunshine hours – average cloud cover is shown instead.

Avg. sea temperature

15.1 °C

Sea temperature available for 4 of 10 years.

Extremes: Highest temperature 17.9 °C (30 Jan 2017) · Lowest temperature -3.4 °C (25 Jan 2023) · Avg. daily peak wind 22 km/h

Weather mix of all days

121Sunny
112Partly cloudy
29Cloudy
21Light rain
19Rain
8Snow

Summary

On average 9.7 °C during the day and 1.2 °C at night.
On average 4.8 rain days (Rain day = at least 1.0 mm of precipitation) with 50.2 mm of precipitation in total.
The sea averaged 15.1 °C.
Prevailing weather: Sunny.
Warmest year: 2024 (avg. 11.3 °C), coolest: 2022 (avg. 8.2 °C).
Wettest year: 2020 (139 mm), driest: 2026 (12.8 mm).
Extremes: 17.9 °C on 30 Jan 2017 and -3.4 °C on 25 Jan 2023.

Overall values from all 10 years. How is this calculated?

Temperatures per year

Average over your travel period

Precipitation & rain days

Year by year

2026
Avg. max9.6°Avg. min0.5°
Rain days
2 Rain days
Precipitation
12.8 mm
Avg. cloud cover
37 % cloudy
Sea temperature
15.0 °C
Max 15.3 °C · Min -1.7 °C
2025
Avg. max10.3°Avg. min1.6°
Rain days
5 Rain days
Precipitation
27.8 mm
Avg. cloud cover
40 % cloudy
Sea temperature
15.4 °C
Max 13.7 °C · Min -0.4 °C
2024
Avg. max11.3°Avg. min2.1°
Rain days
4 Rain days
Precipitation
46.0 mm
Avg. cloud cover
41 % cloudy
Sea temperature
14.6 °C
Max 15.8 °C · Min -0.8 °C
2023
Avg. max9.4°Avg. min1.0°
Rain days
8 Rain days
Precipitation
30.3 mm
Avg. cloud cover
51 % cloudy
Sea temperature
15.2 °C
Max 16.4 °C · Min -3.4 °C
2022
Avg. max8.2°Avg. min0.2°
Rain days
2 Rain days
Precipitation
24.4 mm
Avg. cloud cover
43 % cloudy
Sea temperature
–
Max 12.5 °C · Min -1.4 °C
2021
Avg. max9.5°Avg. min1.0°
Rain days
5 Rain days
Precipitation
85.2 mm
Avg. cloud cover
50 % cloudy
Sea temperature
–
Max 16.6 °C · Min -1.5 °C
2020
Avg. max10.9°Avg. min3.2°
Rain days
10 Rain days
Precipitation
139 mm
Avg. cloud cover
60 % cloudy
Sea temperature
–
Max 16.7 °C · Min 0.1 °C
2019
Avg. max9.4°Avg. min0.4°
Rain days
2 Rain days
Precipitation
18.7 mm
Avg. cloud cover
37 % cloudy
Sea temperature
–
Max 13.4 °C · Min -1.1 °C
2018
Avg. max8.6°Avg. min0.5°
Rain days
6 Rain days
Precipitation
78.3 mm
Avg. cloud cover
44 % cloudy
Sea temperature
–
Max 14.6 °C · Min -3.2 °C
2017
Avg. max9.5°Avg. min1.1°
Rain days
4 Rain days
Precipitation
40.0 mm
Avg. cloud cover
40 % cloudy
Sea temperature
–
Max 17.9 °C · Min -1.9 °C

Frequently asked questions

How warm is it in Tokyo in January?: Daytime highs averaged 9.7 °C, night-time lows 1.2 °C. The highest value of the past 10 years was 17.9 °C (30 Jan 2017), the lowest -3.4 °C (25 Jan 2023).
How often does it rain in Tokyo in January?: On average there were 4.8 rain days (at least 1 mm) with 50.2 mm of precipitation in total.
How warm is the sea in Tokyo in January?: The sea temperature averaged 15.1 °C (open-sea point approx. 10 km from the town).

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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)