Understanding Osaka weather is essential for planning a comfortable trip to Japan’s vibrant second city. Located on the shores of Osaka Bay in the Kansai region, Osaka experiences four distinct seasons — from mild, cherry-blossom-filled springs to hot, humid summers, colorful autumns, and crisp winters. Each season brings different conditions that affect what you’ll wear, what you’ll do, and how much you’ll spend.
This complete Osaka weather guide covers monthly temperatures, rainfall patterns, humidity levels, typhoon season, and practical packing advice so you’ll know exactly what to expect during your visit.
Osaka Weather at a Glance
Osaka has a humid subtropical climate (Köppen classification Cfa) with four distinct seasons. Summers are hot and humid, while winters are cool but rarely severe. The city receives approximately 1,500mm of rainfall annually, with the heaviest rains falling during the June–July rainy season. Here’s a quick overview:
| Month | Avg High | Avg Low | Rain (mm) | Rain Days | Humidity |
|---|---|---|---|---|---|
| January | 9.7°C | 3.0°C | 45 | 6 | 61% |
| February | 10.5°C | 3.2°C | 60 | 7 | 60% |
| March | 14.2°C | 6.0°C | 105 | 10 | 59% |
| April | 19.9°C | 10.9°C | 100 | 10 | 58% |
| May | 24.9°C | 16.0°C | 135 | 10 | 61% |
| June | 28.0°C | 20.3°C | 185 | 12 | 68% |
| July | 31.8°C | 24.6°C | 175 | 11 | 70% |
| August | 33.7°C | 25.8°C | 115 | 8 | 66% |
| September | 29.5°C | 21.9°C | 155 | 11 | 67% |
| October | 23.7°C | 16.0°C | 135 | 9 | 65% |
| November | 17.8°C | 10.2°C | 75 | 7 | 64% |
| December | 12.3°C | 5.3°C | 55 | 7 | 62% |
Spring Weather in Osaka (March–May)
Spring is one of the most pleasant seasons for Osaka weather. March starts cool (6–14°C) with temperatures steadily climbing through April (11–20°C) and into May (16–25°C). Rainfall is moderate — around 100–135mm per month — but showers tend to be brief and intermittent rather than prolonged.
Late March through mid-April is cherry blossom season, when temperatures hover around 15–20°C — ideal for long walks through Osaka Castle Park and along the Okawa River. May is particularly lovely, with warm days (20–25°C), low humidity (around 61%), and plenty of sunshine. It’s one of the best times to visit Osaka.
What to pack for spring: Light layers are key. Mornings and evenings can be cool (especially in March), so bring a light jacket or cardigan. A compact umbrella is useful for occasional spring showers. Comfortable walking shoes are essential for temple and park visits.
Summer Weather in Osaka (June–August)
Summer is the most challenging season for Osaka weather. Temperatures regularly reach 32–34°C in July and August, with the mercury occasionally touching 38°C during heat waves. Combined with humidity levels of 66–70%, the “feels like” temperature can be significantly higher.
The Rainy Season (Tsuyu): June–Mid July
Japan’s rainy season, called tsuyu (梅雨), typically hits Osaka from early June to mid-July. June is the wettest month, receiving around 185mm of rain across 12 rainy days. The rain isn’t constant — expect intermittent showers, sometimes heavy, with occasional sunny breaks. Temperatures during tsuyu range from 20–28°C with high humidity.
After the rainy season lifts in mid-July, Osaka enters its hottest period. August is the peak of summer heat (25–34°C) but is actually drier than June, with only 115mm of rain. This is when you’ll find the best summer festivals, including the famous Tenjin Matsuri.
What to pack for summer: Lightweight, breathable clothing made from moisture-wicking fabrics. A portable fan, sunscreen, sunglasses, and a reusable water bottle are essential. Carry a compact umbrella for sudden downpours. Many visitors appreciate a small towel for wiping away sweat — you’ll see locals using them everywhere.
Autumn Weather in Osaka (September–November)
Autumn brings welcome relief from summer’s heat. September starts warm (22–30°C) and can still feel summer-like, but by October, Osaka weather settles into its most comfortable range: 16–24°C with lower humidity (65%) and abundant sunshine. November cools further (10–18°C) but remains mild — perfect sweater weather.
This is the season of koyo (autumn foliage), which typically peaks in Osaka from mid to late November. The fiery red and gold maples at Minoh Park, Osaka Castle Park, and nearby Katsuo-ji Temple make this one of the most photogenic times to visit.
What to pack for autumn: Layered clothing works best. A medium-weight jacket is useful for November evenings. The transitional weather means mornings can be cool while afternoons are warm. A light rain jacket handles the occasional shower. Comfortable walking shoes are a must for foliage hikes.
Winter Weather in Osaka (December–February)
Winter in Osaka is cold but manageable. Temperatures range from 3–12°C in December, dipping to 3–10°C in January and February (the coldest months). Snowfall is rare in central Osaka — you might see a light dusting once or twice per winter, but it rarely sticks. Rainfall is low (45–60mm per month), making winter one of the driest seasons.
Despite the cold, winter has its charms. The low humidity (60–62%) creates clear skies perfect for city views, and the absence of crowds means shorter queues at popular attractions. Winter illuminations light up the city throughout December, and Osaka’s legendary comfort food — steaming bowls of ramen, hot takoyaki, and warming oden — tastes even better in the cold. This is also the cheapest time to visit Osaka, with hotel rates at their lowest.
What to pack for winter: A warm coat is essential, along with a scarf and gloves for evening outings. Thermal underlayers help on the coldest days. The wind from Osaka Bay can make it feel colder than the thermometer suggests. Waterproof shoes handle occasional rain.
Typhoon Season in Osaka
Japan’s typhoon season runs from May to October, with the peak risk for Osaka occurring in August and September. However, Osaka’s inland position means direct typhoon hits are uncommon. More often, the city experiences peripheral effects — heavy rain, strong winds, and disrupted transport for 1–2 days.
What happens during a typhoon? Trains and buses may be suspended, outdoor attractions close, and some businesses shut temporarily. Flights can be delayed or cancelled. Most typhoons pass through quickly (24–48 hours), and normal service resumes fast.
How to prepare: Monitor the Japan Meteorological Agency (JMA) website and NHK World for forecasts. Download a weather app with typhoon tracking. Keep your hotel reception number handy, and have a backup plan for indoor activities like shopping arcades, museums, and underground malls. Consider travel insurance that covers weather disruptions.
Osaka Weather vs. Other Japanese Cities
How does Osaka weather compare to other popular Japanese destinations? Osaka is slightly warmer than Tokyo year-round due to its southern location. It’s warmer than Kyoto in winter (Kyoto’s inland basin traps cold air) but comparable in summer. Compared to Hiroshima and Fukuoka, Osaka has similar temperatures but slightly more rainfall.
| City | Summer High | Winter Low | Annual Rain |
|---|---|---|---|
| Osaka | 33.7°C | 3.0°C | 1,500mm |
| Tokyo | 31.4°C | 2.5°C | 1,530mm |
| Kyoto | 33.6°C | 1.5°C | 1,490mm |
| Hiroshima | 33.0°C | 2.8°C | 1,540mm |
If you’re planning day trips from Osaka to Kyoto, Nara, or Kobe, expect very similar weather conditions — they’re all within the same climate zone.
Frequently Asked Questions
Does it snow in Osaka?
Rarely. Central Osaka might see a light dusting of snow 1–2 times per winter (usually January or February), but it almost never sticks or accumulates. For guaranteed snow, head to nearby ski resorts in Shiga or the Japan Sea coast — both are accessible as day trips from Osaka.
What is the hottest month in Osaka?
August is the hottest month, with average highs of 33.7°C and lows of 25.8°C. Heat waves can push temperatures above 38°C. The combination of heat and humidity makes it feel even hotter. Stay hydrated, take advantage of air-conditioned spaces, and plan outdoor activities for early morning or evening.
What is the best weather month to visit Osaka?
October arguably offers the best overall weather — comfortable temperatures (16–24°C), low rainfall, low humidity, and abundant sunshine. May is a close second. For more guidance, see our complete best time to visit Osaka guide.
Is Osaka humid?
Yes, especially in summer. Humidity peaks at 70% in July and remains above 66% from June through September. Spring and winter are much more comfortable, with humidity levels around 58–62%. The high summer humidity is one reason many travelers prefer visiting in spring or autumn.
Should I worry about typhoons when visiting Osaka?
If you’re visiting between August and October, there’s a small chance a typhoon could affect your plans. Direct hits on Osaka are uncommon, but peripheral effects (rain and wind) can disrupt 1–2 days of your trip. Monitor forecasts, have indoor backup plans, and consider flexible bookings. Most typhoons pass quickly and normal life resumes within a day.
Osaka weather is manageable year-round with the right preparation. Spring and autumn offer the most comfortable conditions for sightseeing, summer brings festival energy alongside the heat, and winter rewards budget travelers with clear skies and lower prices. Whatever the forecast, Osaka’s incredible indoor food scene, underground shopping arcades, and warm hospitality ensure you’ll have an amazing time. For help planning your ideal Osaka itinerary, see our comprehensive Osaka travel guide.