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Climate guideThirty-year normals for Tokyo
Tokyo climate by month
Humid subtropical · CfaBest Apr–May · Oct
Annual mean15°day and night
Seasonal swing23°warmest vs coolest
Precipitation1,517 mm134 wet days a year
35.69° N, 139.69° EElevation 44 mUTC+9 · Japan Standard Time
When to goTokyo · weather score
Best timeApr–May · Oct
October: high / low20° / 14°
iSummary
What the weather is like
Tokyo has a humid subtropical climate (Köppen Cfa): rain spread through the year and no real dry season.
The warmest month is August, when afternoons average 29° and nights 24°. January is the coolest month, with highs of 8° and lows of 0°. The difference between the warmest and the coolest month is about 23°, a large swing typical of continental interiors.
About 1,517 mm of precipitation falls in an average year. July is the wettest month (155 mm, 17 wet days) and January the driest (50 mm, 5 wet days). Cloud cover ranges from 26% in December to 61% in June.
The sea reaches about 26° in August. Sea temperatures lag the air by a month or two, so late summer is usually warmer for swimming than early summer.
Year in figures
- Hottest afternoons
- 29° · August
- Coldest nights
- 0° · January
- Wettest month
- July
- Driest month
- January
- Clearest skies
- December · 26% cloud
- Warmest sea
- 26° · August
- Longest day
- 14 h 33 min
- Shortest day
- 9 h 46 min
iiCharts
Twelve months at a glance
Temperature and precipitation
Daily high/low range bars, monthly precipitation columns, sea temperature lineTemperature curve
Average high, low and seaDaylight
Hours between sunrise and sunset on the 15th of each monthiiiData table
Climate normals month by month
| Month | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Average high | 8° | 9° | 12° | 17° | 21° | 24° | 28° | 29° | 26° | 20° | 15° | 11° |
| Average low | 0° | 0° | 4° | 9° | 14° | 18° | 22° | 24° | 20° | 14° | 8° | 3° |
| Precipitation | 50 mm | 55 mm | 110 mm | 124 mm | 135 mm | 166 mm | 155 mm | 170 mm | 216 mm | 195 mm | 91 mm | 50 mm |
| Wet days (≥1 mm) | 5.2 | 6.5 | 10.3 | 11.1 | 12.1 | 14.9 | 16.6 | 13.9 | 14.3 | 13.1 | 9 | 6.7 |
| Cloud cover | 27% | 33% | 43% | 45% | 52% | 61% | 53% | 40% | 46% | 42% | 36% | 26% |
| Sea temperature | 14° | 13° | 13° | 15° | 18° | 21° | 23° | 26° | 25° | 22° | 19° | 16° |
| Daylight | 10h 00 | 10h 53 | 11h 55 | 13h 04 | 14h 02 | 14h 33 | 14h 21 | 13h 33 | 12h 27 | 11h 20 | 10h 19 | 9h 46 |
| Month score | 46 | 41 | 38 | 62 | 62 | 54 | 46 | 45 | 57 | 64 | 62 | 45 |
ivMonth by month
Tokyo in every month
January46
8° / 0°
50 mm · 5.2 wet days
February41
9° / 0°
55 mm · 6.5 wet days
March38
12° / 4°
110 mm · 10.3 wet days
April62
17° / 9°
124 mm · 11.1 wet days
May62
21° / 14°
135 mm · 12.1 wet days
June54
24° / 18°
166 mm · 14.9 wet days
July46
28° / 22°
155 mm · 16.6 wet days
August45
29° / 24°
170 mm · 13.9 wet days
September57
26° / 20°
216 mm · 14.3 wet days
October64
20° / 14°
195 mm · 13.1 wet days
November62
15° / 8°
91 mm · 9 wet days
December45
11° / 3°
50 mm · 6.7 wet days