Your April weather guide
MildWeather in Tokyo in April
April is a good time for Tokyo if you want mild weather for exploring the city rather than heat. Average highs of 17°C make walking comfortable, but nights around 9°C call for a jacket. The catch is rain, with about 11 rainy days across the month, so keep your plans flexible. For a UK traveller, it offers a warmer spring than London, not a reliably warm or dry holiday.
Long-term climate averages for Tokyo, not a forecast · 1991-2020
Tokyo, month by month
Your snapshot
At a glance
The useful details for Tokyo.
- Average daytime high
- 17.2°C
- 9 in 10 days stay below 21°C
- Average night-time low
- 8.6°C
- coldest 10% of nights: 4°C or lower
- Compared with London
- +3.7°C
- London averages 13.5°C in April
- Sea temperature
- 15.2°C
- year to year: 15°C to 16°C
- Sunshine per day (est.)
- 5.0h
- 39% of 12.9 h of daylight
- Rainy days (1 mm+)
- 11
- 113 mm over the month
- Humidity
- 74%
- Days over 25°C
- 0%
- none over 30°C
- Record high 1991-2020
- 26.3°C
- 2018-04-22
- Record low 1991-2020
- -1.6°C
- 2001-04-01
- Flight from London
- ≈ 12 h 42 min
- 9595 km, long-haul (estimate for a direct flight)
Records are observed extremes within 1991-2020, not typical holiday conditions. Warm-day percentages are shares of days, not day counts.
How April compares
April is the 7th warmest month of the year in Tokyo and ranks 106th of 134 destinations we compare for April - see where else is hot in April. Against London's average high of 13.5°C in April, Tokyo is 3.7°C warmer by day and 3.5°C warmer at night.
Daytime and night-time in April
The typical April day in Tokyo peaks at 17.2°C, but that is an average: the warmest 10% of days reach 21.4°C or more. Roughly 1 in 250 days top 25°C. Nights average 8.6°C; one night in ten drops to 4.3°C or lower, so pack a layer for evenings - it is genuinely cool after dark. Between 1991 and 2020 the hottest April day here reached 26.3°C (2018-04-22) and the coldest night -1.6°C (2001-04-01).
Rain in April
Wet (more than 8 rainy days): about 11 days with 1 mm or more, 113 mm in total. Year to year it varies a lot - the wettest April was 2008 with 235 mm, the driest 2001 with 41 mm. Humidity averages 74%.
Sea temperature in April
The sea averages 15.2°C - too cold for most (under 18°c). Depending on the year it ranges from 14.6°C to 16.1°C. For the warmest sea here, come in August (26.7°C).
Sunshine and daylight
Around 5.0 hours of sunshine a day (estimated from cloud cover), 12.9 hours of daylight: the sun rises about 05:08 and sets about 18:14 local time in mid-April. Average cloud cover is 62%.
Is April a good time to visit Tokyo?
April is not the strongest month here: mild days and frequent rain. The best months for Tokyo on our scoring are August, September, July; months averaging 25°C or more: Jul, Aug, Sep.
Comfortable days, but pack for chilly evenings
Tokyo's April temperatures suit travellers who prefer walking without strong heat. A light jumper or jacket is a sensible daytime starting point, with layers you can remove when it warms up. The warmer days reach 21.4°C or more, but that is not the everyday expectation. At the other end, the coldest nights fall to 4.3°C or below, so do not pack solely for the daytime average. Bring a warmer layer if you expect to stay out after dark. April makes more sense for an active city break than for anyone hoping to spend the whole trip in shorts and a T-shirt.
Allow for rain rather than planning around sunshine
Rain is the main compromise in April. About 11 rainy days mean waterproof outerwear and shoes that cope with wet pavements deserve space in your luggage. Keep indoor plans available and move longer outdoor walks to the drier spells rather than fixing every day in advance. There is still useful daylight: about 12.9 hours, with roughly 5 hours of sunshine on average. That gives you room to shift your plans, but it does not promise clear skies throughout the day. If dependable dry weather is your priority, April is a compromise; if you can adapt, the mild temperatures are a practical advantage.
A little perspective
Tokyo through the year
April is highlighted. See how it compares with the rest of the year.
| Month | Day | Night | Sea | Sun/day | Rain mm | Rainy days | Days 25°C+ |
|---|---|---|---|---|---|---|---|
| January | 8.1°C | -0.4°C | 13.6°C | 5.9 | 67 | 7 | 0% |
| February | 9.0°C | 0.1°C | 13.2°C | 5.5 | 63 | 8 | 0% |
| March | 12.4°C | 3.5°C | 13.6°C | 4.9 | 114 | 12 | 0% |
| AprilSelected | 17.2°C | 8.6°C | 15.2°C | 5.0 | 113 | 11 | 0% |
| May | 21.7°C | 14.0°C | 18.4°C | 4.4 | 131 | 12 | 13% |
| June | 24.5°C | 18.0°C | 21.3°C | 2.8 | 164 | 14 | 44% |
| Julybest | 28.1°C | 22.0°C | 24.7°C | 3.5 | 151 | 13 | 84% |
| Augustbest | 29.7°C | 23.4°C | 26.7°C | 4.7 | 114 | 11 | 93% |
| Septemberbest | 26.0°C | 20.0°C | 25.1°C | 4.0 | 185 | 14 | 64% |
| October | 20.6°C | 14.1°C | 21.6°C | 4.2 | 211 | 13 | 8% |
| November | 15.5°C | 8.0°C | 18.7°C | 4.7 | 90 | 10 | 0% |
| December | 10.5°C | 2.5°C | 15.6°C | 5.5 | 60 | 8 | 0% |
Day = average daytime high, night = average night-time low, 1991-2020.Sun is hours per day; rainy days count 1 mm or more.
Day, night and sea
Monthly average temperatures, 1991-2020
- Day
- Night
- Sea
Best months here
On warmth, low rainfall and sunshine, start with these.
Keep exploring
Similar in April
Closest matches on daytime temperature, sea temperature and sunshine, in other countries.
A little more detail
Tokyo in April FAQs
Plain answers, grounded in the averages.
Is Tokyo hot in April?
Tokyo is mild in April: the average daytime high is 17.2°C and nights average 8.6°C. Roughly 1 in 250 April days reach 25°C.
Can you swim in the sea in Tokyo in April?
The sea around Tokyo averages 15.2°C in April, which is cold for swimming without a wetsuit. Between 1991 and 2020 it ranged from 15°C to 16°C depending on the year.
How much does it rain in Tokyo in April?
Tokyo sees about 11 rainy days (1 mm or more) and 113 mm of rain in a typical April. The wettest April between 1991 and 2020 was 2008 (235 mm) and the driest was 2001 (41 mm).
How sunny is Tokyo in April?
Tokyo gets around 5.0 hours of sunshine a day in April out of 12.9 hours of daylight (estimated from average cloud cover).
How does Tokyo compare with the UK in April?
Tokyo is on average 3.7°C warmer than London by day in April (17.2°C against 13.5°C).
What is the hottest April on record in Tokyo?
Between 1991 and 2020 the hottest April day in Tokyo reached 26.3°C on 2018-04-22, and the coldest night dropped to -1.6°C on 2001-04-01.
How much warmer is Tokyo than London in April?
Tokyo's average daytime high is 17.2°C, compared with 13.5°C in London, a difference of 3.7°C. That is a noticeable lift for daytime exploring, but evenings remain cool. Think warmer spring weather rather than summer conditions.
Is the sea warm enough for swimming?
The sea averages 15.2°C in April, which is cold rather than comfortable for a casual swim. If warm-water swimming matters to your holiday, Tokyo in April is not a good fit. Choose it for mild city weather instead.
Is April's weather worth the long flight from London?
The flight from London takes about 12 h 42 min, so this is a long-haul trip for mild weather, not guaranteed warmth. April suits a city-focused holiday if you accept cool evenings and rain; it is less convincing for a sunshine-led break.
About these averages
ERA5-Land climate reanalysis via Open-Meteo (11 km grid) and NOAA Coral Reef Watch 5 km sea temperatures, 1991-2020
Averages computed from daily values at Tokyo. Sea temperature from the nearest 5 km sea cell, 14.8 km from that point. Sunshine hours are estimated from average cloud cover.Records are the highest and lowest daily values in that 30-year period, not all-time records. These are climate averages, not a forecast for your trip. How we measure holiday weather
- Hot · 25°C+
- Warm · 20°C to below 25°C
- Mild · 15°C to below 20°C
- Cool · below 15°C