Temperature
Hot by day, mild at night.
85°Ftypical September high
Typical range
September climate
September in Hiroshima
Japan · East Asia
Hot afternoons and some sun. Heavier storm-season rain is the main drawback.
Some tradeoffs
Late
Daytime high
85°F
Lows around 71°F
Rain
Frequent rain
Sun
9 h/day
Air feel
Humid
When to visit
Month-by-month fit
Best
Precipitation
Rain is frequent. About 14 wet days, more than in most months.
47%wet-day frequency
AmountWet-day chance
Sunshine
Cloudier spells limit sunshine.
8.9 hSeptember sunshine
Heat & humidity by month
Warm days, with humid periods.
58%September Heat feel
Easy airWarm airHot airHumid airVery humid air
Hourly temperature pattern
In September, afternoons feel about 88° and nights feel near 77°.
FreezingVery coldColdCoolComfortableWarmHotSwelteringNight hours
Clear sky
Mostly cloudy skies this month.
35%September Clear sky
Clear skyCloud
Wind pattern
Calm winds are typical in September.
5 mphSeptember Calm
More detailIncludes daypart comfort
Typical September day
September late afternoons are around 83°F, easing to about 78°F in early evening.
Avg temp Typical range
Morning79°F
Feels 83°F
Rain27%
Cloud62%
Humid airHigh
Sun intensityModerate
Midday84°F
Feels 88°F
Rain34%
Cloud68%
Humid airHigh
Sun intensityStrong
Late afternoon83°F
Feels 87°F
Rain31%
Cloud66%
Humid airHigh
Sun intensityLow
Early evening78°F
Feels 82°F
Rain20%
Cloud62%
Humid airHigh
Sun intensityMinimal
Best windowData tableView month-by-month numbers
View month-by-month numbers
| Month | High°F | Low°F | Rainin | Wet days | Sunh | Humidity% |
|---|---|---|---|---|---|---|
| Jan | 50 | 36 | 2.2 | 9 | 7.4 | 70 |
| Feb | 52 | 38 | 2.7 | 10 | 8.2 | 68 |
| Mar | 59 | 43 | 4.4 | 12 | 8.6 | 66 |
| Apr | 69 | 52 | 5.0 | 11 | 9.2 | 65 |
| May | 77 | 61 | 5.8 | 11 | 9.7 | 68 |
| Jun | 82 | 69 | 8.6 | 15 | 8.4 | 75 |
| Jul | 89 | 77 | 9.4 | 17 | 9.5 | 78 |
| Aug | 92 | 78 | 7.1 | 15 | 10.4 | 75 |
| Sep | 85 | 71 | 7.4 | 14 | 8.9 | 75 |
| Oct | 75 | 59 | 4.3 | 9 | 8.4 | 73 |
| Nov | 65 | 49 | 2.9 | 8 | 8.0 | 72 |
| Dec | 54 | 40 | 2.5 | 10 | 7.5 | 72 |
Similar climates
Similar
Similar travel styleSuzhouChinaSimilar travel styleWashington DCUnited StatesSimilar travel styleXianChinaSimilar travel styleBeijingChina
Want a side-by-side climate view? Compare Hiroshima with Suzhou.
Climate data notePlanning guidance, not a forecast
Typical monthly values are based on long-term climate records. Useful for planning, not a forecast. Check the weather before you travel.
Sunshine: source type is not yet identified at metric level.
Local microclimates can vary by beach, neighborhood, trail, or elevation.
Last updated: Jun 1, 2026
Data & methodology