Itami, Japan experiences average highs of 20°C (68°F) and lows of 13°C (55°F) throughout the year. Rainfall is moderate, averaging about 10 rainy days per month. Average highs have stayed broadly stable across the available records.
Itami, Japan Weather & Climate 2026
Monthly climate averages for Itami, Japan. Based on 10-year ERA5 reanalysis data.
Climate Overview
Drier season: Jan–Dec 
Wetter season: Jun–Oct At-a-Glance Climate Summary
Live Weather & Air Quality
Key figures
Climate Score
5.7/10
Best: April, May, June, October, November
UV Index
5
Low
Temperature 20°C / 13°C
Feels Like 20°C / 13°C
Rainy Days 10
Rainfall 130 mm
Sunshine 8 h
Humidity 77%
Wind Speed 14 km/h
Dew Point 12°C
Snow Days 1 days
Frost Days 4 days
Hottest Month
32°C
August
Avg Low 25°C
Rain 12 days
Coldest Month
2°C
January
Avg High 9°C
Rain 6 days
Driest Month
6 days
January
Avg High 9°C
Avg Low 2°C
Windiest Month
16 km/h
February (Gusts 38)
Sea Temperature
9°C – 29°C
Warmest water: August (
29.4°C
)
Worst Time to Visit
Consider avoiding January, February, July, August due to frequent rain.
Sun Position
Sunrise 04:56
Daylight 14.3h
Sunset 19:12
Live conditions —
Itami on the map · live conditions
Itami, Japan
- Continent
- Asia
- Country
- Japan
- City
- Itami
- Population
- 198.1K
- Coordinates
- 34.78°, 135.40°
Seasonal Breakdown
Spring
Mar–May
Avg High 19°C
Avg Low 10°C
Rain 10 days/mo
2/3 best months
Summer
Jun–Aug
Avg High 30°C
Avg Low 23°C
Rain 13 days/mo
1/3 best months
Autumn
Sep–Nov
Avg High 22°C
Avg Low 16°C
Rain 10 days/mo
2/3 best months
Winter
Dec–Feb
Avg High 10°C
Avg Low 3°C
Rain 6 days/mo
Climate Charts
Based on historical averages (2016–2025)
Monthly Temperatures
High Low Shaded bands show the typical range across the available yearly records.
Line chart showing monthly temperatures. Jan: 9°C / 2°C . Feb: 10°C / 2°C . Mar: 14°C / 6°C . Apr: 19°C / 10°C . May: 23°C / 15°C . Jun: 27°C / 20°C . Jul: 31°C / 24°C . Aug: 32°C / 25°C . Sep: 28°C / 22°C . Oct: 22°C / 16°C . Nov: 17°C / 9°C . Dec: 11°C / 4°C .
Monthly Rainfall
Rainfall
Bar chart showing monthly rainfall. Jan: 49 mm. Feb: 60 mm. Mar: 103 mm. Apr: 138 mm. May: 164 mm. Jun: 215 mm. Jul: 222 mm. Aug: 163 mm. Sep: 170 mm. Oct: 171 mm. Nov: 63 mm. Dec: 47 mm.
Monthly Humidity
Humidity
Line chart showing monthly humidity. Jan: 76%. Feb: 73%. Mar: 73%. Apr: 73%. May: 74%. Jun: 79%. Jul: 82%. Aug: 79%. Sep: 80%. Oct: 78%. Nov: 78%. Dec: 77%.
Monthly Wind Speed
Wind Speed Gusts
Bar chart showing monthly wind speed. Jan: 16 km/h . Feb: 16 km/h . Mar: 16 km/h . Apr: 16 km/h . May: 14 km/h . Jun: 14 km/h . Jul: 13 km/h . Aug: 14 km/h . Sep: 13 km/h . Oct: 13 km/h . Nov: 13 km/h . Dec: 15 km/h .
Sunshine
Sunshine
Sunshine: Jan: 8h. Feb: 8h. Mar: 8h. Apr: 9h. May: 9h. Jun: 9h. Jul: 9h. Aug: 10h. Sep: 8h. Oct: 8h. Nov: 8h. Dec: 7h.
Sea Temperature
Sea Temperature swim
Line chart showing monthly sea temperature. Jan: 10°C . Feb: 9°C . Mar: 11°C . Apr: 15°C . May: 19°C . Jun: 23°C . Jul: 28°C . Aug: 29°C . Sep: 29°C . Oct: 24°C . Nov: 18°C . Dec: 13°C .
UV Index
UV Index
Bar chart showing monthly UV index. Jan: UV 3. Feb: UV 4. Mar: UV 5. Apr: UV 6. May: UV 6. Jun: UV 7. Jul: UV 8. Aug: UV 7. Sep: UV 6. Oct: UV 5. Nov: UV 4. Dec: UV 3.
Monthly Daylight Hours
Daylight 12h reference
Monthly Dew Point & Comfort
Dew Point Dry Comfortable Humid Muggy
Snow Days
Snow Days Snowfall
Snow Days: Jan: 2 days. Feb: 1 days. Mar: 1 days. Apr: 0 days. May: 0 days. Jun: 0 days. Jul: 0 days. Aug: 0 days. Sep: 0 days. Oct: 0 days. Nov: 0 days. Dec: 0 days.
Climate Trends
Average highs have stayed broadly stable across the available records. Average rainfall is trending drier by about 33 mm.
2016 to 2025
Avg high Avg rainfall
Climate summary
| Last 12 months | All years | |
|---|---|---|
| Hottest month | Jul 2025 · 33°C | Aug · 32°C |
| Coldest month | Feb 2025 · 1°C | Jan · 2°C |
| Wettest month | May 2025 · 219 mm | Jul · 222 mm |
| Windiest month | Feb 2025 · 18 km/h | Feb · 16 km/h |
Month-by-Month Weather Table
January
Poor 
February
Poor March
Fair April best
Good May best
Excellent June best
Excellent July
Wet August
Poor September
Good October best
Excellent November best
Good December
Fair | Month | Temp | Feels Like | Rain | Sun | Humidity | UV | Status | Details |
|---|---|---|---|---|---|---|---|---|
| January | 9°C / 2°C | 5°C / -1°C | 6days (49 mm) Good | 7.6h Good | 76% Humid | 3.3 Moderate | Poor | View Details |
| February | 10°C / 2°C | 6°C / -1°C | 7days (60 mm) Good | 7.9h Good | 73% Muggy | 4.1 Moderate | Poor | View Details |
| March | 14°C / 6°C | 12°C / 3°C | 10days (103 mm) Wet | 8.4h Good | 73% Muggy | 4.9 Moderate | Fair | View Details |
| April best | 19°C / 10°C | 18°C / 9°C | 10days (138 mm) Wet | 8.9h Good | 73% Muggy | 6 High | Good | View Details |
| May best | 23°C / 15°C | 24°C / 15°C | 10days (164 mm) Wet | 9.1h Good | 74% Muggy | 6.1 High | Excellent | View Details |
| June best | 27°C / 20°C | 29°C / 22°C | 13days (215 mm) Wet | 8.7h Good | 79% Humid | 6.5 High | Excellent | View Details |
| July | 31°C / 24°C | 36°C / 29°C | 15days (222 mm) Wet | 9.3h Good | 82% Humid | 7.5 Very High | Wet | View Details |
| August | 32°C / 25°C | 37°C / 30°C | 12days (163 mm) Wet | 10.4h Excellent | 79% Humid | 7.3 Very High | Poor | View Details |
| September | 28°C / 22°C | 32°C / 25°C | 13days (170 mm) Wet | 8.4h Good | 80% Humid | 6.4 High | Good | View Details |
| October best | 22°C / 16°C | 23°C / 16°C | 11days (171 mm) Wet | 7.7h Good | 78% Humid | 4.7 Moderate | Excellent | View Details |
| November best | 17°C / 9°C | 15°C / 8°C | 7days (63 mm) Good | 7.8h Good | 78% Humid | 3.7 Moderate | Good | View Details |
| December | 11°C / 4°C | 8°C / 1°C | 6days (47 mm) Good | 7.4h Good | 77% Humid | 3.1 Moderate | Fair | View Details |
Compare Nearby City Climates
Frequently Asked Questions
The best months to visit Itami are April, May, June, October, November, when temperatures are comfortable and rainfall is at its lowest. This is based on 10-year climate averages for Itami, scoring temperature, rainfall, humidity, and sunshine hours.
The hottest month in Itami is August, with average daytime highs of 32°C (90°F). Plan outdoor activities for early morning or late afternoon if visiting during this period.
The coldest month in Itami is January, with average overnight lows of 2°C (35°F). Pack warm layers and expect shorter daylight hours during this period.
The wettest month in Itami is July, averaging 222mm of precipitation across 15 rainy days. An umbrella or waterproof jacket is essential.
The rainy season in Itami runs through July, June, September, August, with the heaviest rainfall in July. Based on 10-year averages for Itami.
Itami receives approximately 102 sunshine hours per year. The sunniest month is August with around 10 hours. Based on climate data for Itami.
The least favorable months to visit Itami are January, February, July, August, primarily due to frequent rain. For the best conditions, consider April, May, June, October, November instead.
The annual average UV index in Itami is 5, classified as moderate. Standard sun protection (sunscreen, hat) is recommended during prolonged outdoor exposure.
Average humidity in Itami is 77%, classified as humid. Humidity levels are generally comfortable and should not affect outdoor activities for most people.
Yes — sea temperatures in June, July, August, September, October average 27°C (81°F), which is warm and comfortable for swimming and water activities.
Yes, Itami receives snow. Months with snowfall average 1 snow days and 0 cm (0 in) of accumulation, with about 4 frost days during winter.
Average wind speeds in Itami are 14 km/h (9 mph). The windiest month is February with peak winds reaching 16 km/h (10 mph) (gusts up to 38 km/h / 24 mph).
Itami averages 3 clear-sky days per month with overall cloud cover around 59%. The clearest skies occur in November.
The annual average dew point in Itami is 12°C (54°F), which feels pleasant with low humidity. Outdoor activities are comfortable year-round from a humidity standpoint.
Itami has a Humid Subtropical climate, classified as Cfa under the Köppen system. Temperate climates have mild winters and warm summers, with rainfall spread across the year and four distinct seasons.
The 'feels like' temperature in Itami ranges from 13°C (55°F) to 20°C (68°F) on average. The 'feels like' temperature closely matches the actual temperature throughout most of the year.
July is not the best time to visit Itami, with a climate score of 2.6/10. Consider visiting during April, May, June, October, November instead for better conditions.
For July in Itami, pack Umbrella, Waterproof jacket, Waterproof shoes, Breathable clothing, Sunscreen (SPF 30+). With average highs of 31°C (87°F) and 15 rainy days, these essentials will keep you comfortable.
Data Source
Climate data derived from ERA5 reanalysis (ECMWF), averaged over 2016–2025. Sea surface temperature from marine reanalysis data. Climate scores and seasonal estimates are computed by WorldStats.
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