Tokyo 30-Day Weather Forecast: Temperatures & Rain Tips

Anyone who has tried to nail down Tokyo’s weather a full month ahead knows the puzzle: one forecast promises sun, another warns of rain, and the humidity can make even modest temperatures feel like a different season entirely. This guide pulls together official climate patterns and travel know-how so you can actually use that 30-day outlook to plan your trip, not second-guess it.

Average high temperature in July: 31°C (88°F) ·
Average low temperature in July: 24°C (75°F) ·
Rainy days in July (average): 12 days ·
Humidity range in summer: 70–85% ·
Best months for travel: March–May, October–November

The table below compiles the six key figures that define Tokyo’s current 30-day weather outlook, drawn from official and authoritative sources.

Is it a good time to visit Tokyo now?

Best months for weather and tourism

• Spring (March–May): mild 10–20°C, low rainfall, cherry blossoms, peak tourism season.
• Autumn (October–November): pleasant 15–25°C, clear skies, fall foliage, fewer crowds than spring.
• Winter (December–February): cold but dry, 2–10°C, lower hotel rates, ideal for indoor attractions.

Spring and autumn consistently rank as the most comfortable seasons for outdoor sightseeing, with moderate temperatures and lower humidity. According to CityWeather (climate guide), spring highs reach 13–19°C while autumn highs sit between 23–28°C, both well within the comfortable range for walking-based travel.

When to avoid: rainy season and typhoon months

• Rainy season (June–mid-July): rain on roughly 2 out of 3 days, high humidity, overcast skies.
• Typhoon season (August–September): risk of heavy storms, flight cancellations, and flooding.
• Peak summer (July–August): heat index often exceeds 35°C, indoor breaks become necessary.

The TripGuide Tokyo (local travel guide) notes that rain occurs on roughly two out of every three days during tsuyu, making itinerary flexibility essential. August typhoons add another layer of uncertainty, as storm tracks can change with little notice.

Current conditions snapshot

As of late June, Tokyo is in the middle of its rainy season. Daytime temperatures hover around 27–30°C with humidity above 75%, and moderate to heavy rain showers appear regularly in short-range forecasts, according to World Travel Guide (travel authority). The 30-day outlook points to continued unsettled conditions through mid-July, followed by a gradual shift to hotter, stickier summer weather.

What is the 30-day weather forecast for Tokyo?

Daily high and low temperatures

Long-range forecast models from multiple sources converge on a consistent pattern for the next 30 days: daytime highs averaging 31°C and nighttime lows around 24°C. Weather25 (long-range forecaster) shows temperatures in the high 20s to mid-30s °C across its August forecast window, while Meteoprog (monthly forecaster) reports September highs similarly in the mid-to-low 30s °C and lows in the low-to-mid 20s °C.

The table below breaks down the temperature and rain risk trends across the 30-day forecast period.

The pattern here is clear: temperatures edge upward across the 30 days, while rain risk remains a constant factor that travelers need to plan around.

Precipitation probability and rainy days

The QWeather (weather data service) 30-day forecast estimates roughly 12–18 rainy days within a typical summer window, with some days bringing moderate or heavy showers depositing around 19.2 mm of rain. World Travel Guide confirms that moderate to heavy rain showers appear frequently in Tokyo’s short-range summer forecasts.

Humidity and wind conditions

Humidity in Tokyo during summer ranges from 70% to 85%, with the highest levels occurring during and immediately after the rainy season. Weather25 data indicates that the combination of heat and moisture creates a heat index that can make the air feel 5–10°C hotter than the actual temperature. Winds are generally light except during typhoon passages, when gusts can exceed 100 km/h.

Is it very hot in Tokyo now?

Current temperature and heat index

• Actual temperature range: 27–31°C during the day.
• Heat index (feels-like): 32–38°C due to humidity.
• Nighttime lows offer little relief, staying around 24–26°C.

With humidity sitting at 70–85%, the heat index amplifies the real temperature significantly. World Travel Guide notes that summer conditions in Tokyo can feel oppressive for visitors unaccustomed to high humidity, with the combination of heat and moisture making midday sightseeing uncomfortable.

Comparison to seasonal averages

Tokyo’s average high in July is 31°C, which is consistent with the current 30-day outlook. Meteoprog (monthly forecaster) data shows September highs remain in the low-to-mid 30s °C, meaning the heat extends well beyond midsummer. By contrast, spring highs of 13–19°C and autumn highs of 23–28°C are markedly more comfortable, per CityWeather.

Health tips for hot weather

• Heatstroke warnings are common in Tokyo from July through September.
• Stay hydrated — carry a water bottle and drink regularly.
• Plan indoor activities (museums, shopping arcades, cafes) during 12:00–15:00.
• Use portable fans, cooling towels, and UV-blocking umbrellas.

The Japan Meteorological Agency issues heatstroke alerts when the wet-bulb globe temperature (a combined measure of heat, humidity, and radiation) exceeds 31°C. Visitors should monitor local alerts and adjust their schedules accordingly.

Is it rainy season in Tokyo right now?

Typical rainy season dates and duration

Tokyo’s rainy season, known as tsuyu, usually starts in early June and ends in mid-July. TripGuide Tokyo confirms the window runs from around June 8 to July 19. During this six-week stretch, the city experiences its highest concentration of rainfall, with the region’s monsoon airflow colliding with cooler Pacific currents.

Current rain outlook

As of late June, Tokyo is firmly within the tsuyu period. The 30-day forecast indicates frequent rain through mid-July, with the QWeather model estimating 12–18 rainy days in the window. World Travel Guide describes the conditions as moderate to heavy rain showers appearing on multiple days per week.

How rainy season affects travel plans

• Outdoor attractions (Meiji Shrine, Shinjuku Gyoen) are less enjoyable in persistent rain.
• Photography conditions deteriorate — overcast skies and wet crowds.
• Indoor alternatives (teamLab Borderless, Tokyo National Museum, shopping districts) become the backbone of any itinerary.
• Transportation rarely stops, but surface flooding can cause delays.

The implication is clear: travelers arriving during tsuyu need a rain-first packing strategy and a flexible daily plan. TripGuide Tokyo emphasizes that rain gear — specifically a compact umbrella and waterproof footwear — makes the difference between a ruined day and a manageable one.

What to wear in Tokyo?

Summer clothing guide

• Lightweight, breathable fabrics: cotton, linen, quick-dry synthetics.
• Loose-fit tops and shorts or skirts for maximum air circulation.
• UV-protective hat and sunglasses.
• Comfortable, breathable walking shoes (sandals with good grip for rain).

CityWeather (climate guide) recommends light layers even in summer because air-conditioned trains, shops, and restaurants keep indoor temperatures around 22–24°C, creating a sharp contrast with the outdoor heat. A thin cardigan or scarf that fits in a day bag solves the indoor chill problem.

Winter clothing guide

• Warm coat or insulated jacket (temperatures 2–10°C).
• Scarf, gloves, and a beanie for cold mornings and evenings.
• Layered base + mid-layer + outer shell for temperature swings.
• Closed, waterproof shoes for occasional rain or sleet.

Winter in Tokyo is dry, which makes the cold feel more manageable than in humid climates. CityWeather notes that winter lows hover around 1–2°C, but daytime highs often reach 8–10°C, making layered clothing the most practical approach.

Rainy season and layering tips

• Compact travel umbrella (mandatory — shops sell them on every corner).
• Waterproof shoes or shoes with good grip (wet pavement is slippery).
• Quick-dry clothing for layering under a rain shell.
• A small towel or handkerchief — public restrooms often lack paper towels.

TripGuide Tokyo suggests that locals rely on a simple formula: a rain layer on top, quick-dry base underneath, and a second pair of socks in the day bag. The guide notes that rain occurs on roughly two out of three days during tsuyu, making waterproof footwear the single most important packing decision.

Tokyo’s seasonal timeline

• Early June — Rainy season (tsuyu) begins. Frequent rain, high humidity, overcast skies.
• Mid-July — Rainy season ends. Summer heat intensifies, temperatures climb above 30°C.
• August — Peak summer heat. Typhoon season begins. Highest temperature and humidity levels.
• September — Typhoon risk highest. Still hot, but humidity begins to drop late in the month.
• October — Comfortable autumn weather returns. Clear skies, pleasant temperatures, travel conditions improve.
• December — Winter dry season begins. Cold but sunny, low humidity, good for indoor attractions.

The timeline shows a clear pattern: Tokyo’s weather is most hospitable in the shoulder seasons (spring and autumn), while summer carries a dual burden of rain and heat. CityWeather data confirms that autumn shoulder months (October–November) see 8–10 rainy days per month with 120–180 mm rainfall, compared to summer’s 12–18 rainy days and higher totals.

What’s confirmed vs. what’s uncertain

“Long-range 30-day forecasts are most useful for identifying trends — like ‘this period tends to be rainy’ — but they don’t give you reliable day-by-day accuracy. That requires a shorter lead time.”

— QWeather (weather data service) methodology note

“Moderate or heavy rain showers appear on multiple days during the summer period. Travelers should plan for wet conditions and bring appropriate gear.”

— World Travel Guide (travel authority) Tokyo weather overview

“The tsuyu season concentrates frequent rain into a short window. Rain occurs on roughly two out of three days, so a flexible itinerary and the right clothing make a real difference.”

— TripGuide Tokyo (local travel guide)

One pattern emerges from these perspectives: the 30-day forecast is a planning compass, not a daily guarantee. For the traveler, the smart approach is to use the long-range outlook to choose the right season and pack the right gear, then switch to a 7-day forecast for actual day-by-day decisions.

Related reading: Tokyo clothing and packing guide by season · Tokyo rainy day fashion and rainy season guide

Frequently asked questions

Editor’s note: Weather forecasts are inherently uncertain beyond 7–10 days. The data in this article draws on multiple sources to provide a reliable planning picture, but conditions can change. Always check a near-term forecast before departure. Prices and conditions mentioned reflect typical patterns, not guarantees.