Weather in Tokyo 🇯🇵
Monthly weather averages & travel planning
September
Avg Temp
26°C
Rain Days
14 days
Sun Hours
8 hrs
Humidity
65%
Asia › 🇯🇵 Japan › Tokyo
Updated: March 2026
Is September a Good Time to Visit Tokyo?
4/10
Fair
September is a fair time to visit Tokyo (4/10). With 8 daily sunshine hours and only 14 rain days, this month delivers genuinely reliable outdoor conditions, ranking it 9th sunniest of the year in Tokyo. September suits travellers visiting for indoor culture, food, and architecture rather than outdoor activities. Pack accordingly for 14 potential rain days. October offers a similar profile at lower hotel rates if dates are flexible. The main practical note: Tokyo's popular sites are busiest between 10am and 3pm regardless of season. Arriving at opening time or after 4pm makes a significant difference to the experience. Planning tips: most accommodation categories have availability, and last-minute deals are common. The quieter streets and shorter queues can make this a genuinely enjoyable time to visit for the right type of traveller. Budget-conscious visitors will find the best value of the year in this period.
vs August:30°C avg high
Step off the plane in Tokyo in September and the air meets you at around 26°C, a temperature that feels genuinely welcoming after a long flight. By the time evening arrives and temperatures settle near 20°C, the city takes on a different character entirely. With 8 hours of daylight sun on offer, September gives you the raw material for a genuinely memorable trip.
26°C
79°F
Avg High
20°C
68°F
Avg Low
14 days
189 mm total
Rain Days
8h
per day avg
Sunshine
65%
Moderate
Humidity
Temperature in Tokyo in September
The 6°C day-night temperature range is typical for continental climates: a light jacket in the morning that you shed by midday and need again after sunset. Humidity averages 65%, which is comfortable for most visitors. On warmer days, lighter fabrics help with the mild stickiness in the afternoon. UV index averages 6 this month, classed as moderate. Sunscreen is a sensible precaution for extended outdoor time, particularly at midday. Wind averages 20 km/h, light enough to be refreshing on warm days but noticeable in open coastal areas or elevated viewpoints. In Fahrenheit: 79°F average high, 68°F overnight low. Data sourced from Open-Meteo ERA5 climate reanalysis (1991–2020 normals).
Temperature Trends
High
Low
Rainfall (mm)
0-20 mm21-50 mm51-100 mm100+ mm
What to Wear in Tokyo in September
Morning20°CBefore the day warms up
Afternoon26°CPeak daytime temperature
Evening23°CAfter sunset cools down
Packing for Tokyo in September means dressing for 26°C days and 20°C evenings. A light cotton tee with a casual overshirt works well at 26°C, the overshirt doubles as a layer for air-conditioned venues. Evening temperatures settle at 20°C, a modest 6°C drop that a light cardigan or denim jacket covers. Comfortable walking trainers are the versatile choice for both outdoor sightseeing and indoor venues. With 14 rain days expected, a compact travel umbrella is worth the bag space. A waterproof jacket is better than an umbrella if you plan full-day outdoor routes. For temple and religious site visits, carry a lightweight scarf or sarong to cover shoulders and knees, required at most major sites across the region.
Local tip: Temple and religious site visits require covered shoulders and knees in most of Tokyo's heritage areas. A lightweight scarf or sarong weighs almost nothing and solves the problem instantly.
Events in Tokyo in September
September has no major festivals or public holidays in Tokyo, which is one of its practical advantages for independent travellers. Attractions run at lower capacity than during peak event periods, queues are shorter, and accommodation is easier to find without needing to book many months in advance. Local restaurants, markets, and transport operate at a relaxed pace, making this an ideal time for visitors who prefer a more authentic, unhurried experience of everyday city life rather than large crowds drawn in by a single major headline event.
What to Pack for Tokyo in September
Based on 26°C average highs and 14 rainy days
- Light layers for morning and evening
- Breathable T-shirts and comfortable trousers
- UV-protective sunglasses
- Quick-dry travel towel
- Anti-chafe balm for long walking days
- Moisture-wicking synthetic fabrics for active days
- Compact folding umbrella
- Waterproof outer layer or packable rain jacket
- Quick-dry clothing that recovers fast after a shower
- SPF 30+ sunscreen
- Comfortable walking shoes (a second pair lets the first air out overnight)
- Universal travel adapter
- Small day pack for city exploration
- Reusable water bottle
Best Activities in Tokyo in September
- Explore outdoor markets and street food stallsMid-morning (10am-12pm)At 26°C, the temperature is ideal for extended walking without overheating
- Guided walking tour of the historic centreMorning or late afternoonComfortable temperatures allow several hours on foot without fatigue
- Visit rooftop viewpoints and observation decksGolden hour (1 hour before sunset)Warm clear evenings provide exceptional visibility for panoramic photography
- Day trip to the surrounding countryside or coastFull day (depart by 8am)September is reliably dry enough for rural day trips without weather risk
- Spend a morning in the national or city art museumOpens at 10am; arrive earlyWith 14 rain days expected, having a full-day indoor plan is practical insurance
- Cooking class focused on regional cuisineHalf-day sessions run 10am-1pm or 3-6pmIndoor activity that fills a rainy half-day with genuine cultural content
- Visit covered historical sites: cathedral, palace, or bazaarAny time; most crowded middayRoofed monuments and covered markets provide exploration without weather exposure
- Visit the main botanical garden or city park at seasonal peakYear-round; best light in morningSeptember brings distinct seasonal changes to public green spaces worth exploring
- Seek out chilled local specialities: cold-brew tea, ice desserts, or chilled seafood at street-level stallsAny time; most atmospheric in evening marketsHot-weather street food culture peaks in September, with vendors setting up specifically for warm evenings
Why is Tokyo warm in September?
Tokyo's September heat is driven by the Asian summer monsoon system, as the low-pressure cell that forms over the heated landmass draws warm, humid air from the oceans. The result is temperatures averaging 26°C with high moisture in the air. Overnight temperatures remain elevated at 20°C, as clouds and humidity prevent the earth from radiating heat away after sunset. Climate data: Open-Meteo ERA5 (1991–2020).
Sunshine Hours
The average number of hours per day with direct sunlight. Calculated from satellite measurements. Days with more than 7 hours of sunshine are ideal for outdoor activities. Under 3 hours means overcast conditions dominate.
UV Index
A scale from 0-11+ measuring ultraviolet radiation intensity. UV 0-2: Minimal risk. UV 3-5: Moderate, wear sunscreen. UV 6-7: High, hat and SPF 30+ essential. UV 8-10: Very High, limit midday exposure. UV 11+: Extreme, seek shade between 10am-4pm.
Rain Days
A rain day is counted when precipitation exceeds 0.1mm. This threshold captures even light drizzle. Unlike total rainfall in mm, rain days tells you how often you might need an umbrella, which is useful for planning outdoor activities.
Humidity
Relative humidity as a percentage. Below 40%: Dry, skin and throat may feel parched. 40-60%: Comfortable, ideal for most people. 60-80%: Sticky, light breathable fabrics recommended. Above 80%: Muggy, heat feels more intense; quick-dry clothing is essential.
Frequently Asked Questions
Tokyo in September
In September, Tokyo experiences average highs of 26°C (79°F) and lows of 20°C (68°F). Expect around 14 rainy days and 8 hours of sunshine per day, with humidity averaging 65%. The 6°C gap between daytime and overnight temperatures is worth planning around: light layers work for most visitors during the day, but an overshirt or cardigan handles the cooler evenings. UV index averages 6, so sun protection is advisable on clear days.
Tokyo typically sees 14 rainy days in September, with total precipitation of around 189mm. Rain is moderate and manageable. Showers tend to pass quickly, and a light rain layer or foldable umbrella is sufficient protection for most days. For context, the driest month in Tokyo typically sees 4-6 fewer rain days than September.
Pack light layers, a light jacket for evenings, comfortable walking shoes, and sunscreen for Tokyo in September. Daytime temperatures of 26°C are pleasant, but the evening drop to 20°C means a jacket is essential if you plan to be out after dark. With 14 rainy days, bring a compact umbrella or waterproof jacket for unexpected showers. Comfortable walking shoes are a priority given the amount of ground most visitors cover.
September is a reasonable time to visit Tokyo. Expect 14 rainy days, so pack a light rain layer for flexibility. Average temperatures of 26°C make outdoor exploration comfortable during the dry periods. With 8 daily sunshine hours, there are reliable windows of good weather to plan outdoor activities around, even if the month is not the driest on the calendar.
The average high temperature in Tokyo in September is 26°C (79°F), and the average low is 20°C (68°F). The mean daily temperature is approximately 23°C (73°F). The day-to-night range of 6°C is moderate, meaning a single light jacket covers most situations. These are 30-year climate normals based on the 1991 to 2020 reference period; individual years will vary, particularly in transitional months like spring and autumn.
The best month to visit Tokyo is generally August. August offers the most sunshine at 10 hours per day and only 11 rainy days. Average temperatures reach 30°C, making it comfortable for sightseeing, outdoor dining, and exploring the city. If your travel dates are flexible, planning your trip around August gives you the best chance of dry, bright weather.
September is shoulder or low season in Tokyo, meaning fewer tourists and generally lower prices than peak months. With 8 sunshine hours and 14 rainy days, the weather is less of a draw for mass tourism. This is an advantage for travellers who prefer a quieter, more relaxed experience with shorter queues and easier accommodation availability.
In September, Tokyo suits a range of activities thanks to mild temperatures around 26°C. Mix of indoor and outdoor activities works well given the moderate chance of rain. Top options include exploring historic neighbourhoods, visiting museums and galleries, local food markets, and day trips to surrounding areas. With 8 hours of sunshine, parks and waterfront walks are particularly enjoyable.
September ranks 9th sunniest of the year in Tokyo, with an average 8 daily sunshine hours. The driest months are January, December, and February. August is the hottest month (30°C avg high); January is the coolest (8°C). From here, temperatures fall 5°C into October. Compared to last month (August: 30°C high, 11 rain days), September is cooler and wetter. September sits in the middle of the annual sunshine ranking for Tokyo, offering a reasonable balance of good weather and manageable crowds.
Year-Round Climate
| Month | High | Low | Rain Days | Sun | Details |
|---|---|---|---|---|---|
| January | 8°C | 0°C | 6 | 8h | View |
| February | 9°C | 1°C | 8 | 8h | View |
| March | 12°C | 4°C | 12 | 8h | View |
| April | 17°C | 9°C | 11 | 9h | View |
| May | 22°C | 14°C | 11 | 9h | View |
| June | 25°C | 18°C | 15 | 8h | View |
| July | 28°C | 22°C | 13 | 9h | View |
| August | 30°C | 24°C | 11 | 10h | View |
| September | 26°C | 20°C | 14 | 8h | View |
| October | 21°C | 14°C | 13 | 7h | View |
| November | 16°C | 8°C | 9 | 7h | View |
| December | 11°C | 3°C | 7 | 7h | View |
January
6 rain days, 8h sun
8°0°
February
8 rain days, 8h sun
9°1°
March
12 rain days, 8h sun
12°4°
April
11 rain days, 9h sun
17°9°
May
11 rain days, 9h sun
22°14°
June
15 rain days, 8h sun
25°18°
July
13 rain days, 9h sun
28°22°
August
11 rain days, 10h sun
30°24°
September
14 rain days, 8h sun
26°20°
October
13 rain days, 7h sun
21°14°
November
9 rain days, 7h sun
16°8°
December
7 rain days, 7h sun
11°3°
Other Months in Tokyo
Plan Your Trip to Tokyo
Nearby Destinations
Cities within 500 km with comparable weather conditions
Data Sources for Tokyo
Climate normals represent 30-year averages (1991-2020). Individual years may vary.