Hiroshima in October
In October, Hiroshima has 109.2 mm (4.30 in) of rain, a daily high of 23.7 °C (74.7 °F) and a daily low of 14.9 °C (58.8 °F), as 1991-2020 means; figures in brackets are converted.
Last updated : what the month is like; shorter source notes.
Best time to visit Hiroshima: October meets our rule. Expect 6.2 rain days and days that shorten by 1 h 02 min.
What October is like in Hiroshima
- Children carry portable shrines from Hiroshima Toshogu the day before or after its autumn festival in mid-October. A kirin lion dances with them. It is said to come down in times of peace. Source: Hiroshima Toshogu, checked .
- Pots of chrysanthemums fill the Ninomaru of Hiroshima Castle from late October to early November. Some have big blooms. Others hang down in cascades or grow as bonsai. Source: Dive! Hiroshima (Hiroshima Tourism Association, official), checked .
- In the maple wood of Hiroshima Botanical Garden, some fifty kinds of maple change colour from late October to late November. Source: Hiroshima Botanical Garden (official; Wayback copy, live site is http only), checked .
Key figures
Weather in October, 1991-2020 means
- Daily high
- 23.7 °C (74.7 °F)
- Daily low
- 14.9 °C (58.8 °F)
- Rain
- 109.2 mm (4.30 in) in the month
- Sunshine
- 178.6 h in the month
Climate normals 1991-2020, computed by JMA and submitted to the World Meteorological Organization. Checked .
Station: Hiroshima, 1.6 km from the city centre point.
In October the sea off Hiroshima averages 23.1 °C (73.6 °F), 2.1 °C cooler than in September.
Our 1991-2020 mean of NOAA OISST v2.1, checked .
Daylight on 15 October 2026
- Sunrise
- 06:15 local time
- Sunset
- 17:36 local time
- Day length
- 11 h 21 min
Day length 1-31 October: 11 h 51 min to 10 h 49 min, -1 h 02 min.
Source: NOAA Solar Calculator equations, checked .
Month by month
Each month: daily high in °C, then rain in mm, 1991-2020 means.
WMO climate normals 1991-2020, as above, checked .
This month against the year
| Measure | October | Rank |
|---|---|---|
| Daily high | 23.7 °C | 6th warmest |
| Daily low | 14.9 °C | 6th warmest |
| Rain | 109.2 mm | 5th driest |
| Sunshine | 178.6 hours | 4th sunniest |
| Day length | 11 h 21 min | 5th shortest |
Equal values share a rank. How we rank months
Sunshine share: 51% of the 351.1 hours from sunrise to sunset in October. How we compute sunshine share
Hiroshima in October, on average: 6.2 rain days (1 mm or more).
WMO climate normals 1991-2020, as above, checked .
Day length: NOAA solar equations, checked .
Public holidays this month
| Date | Holiday | Scope |
|---|---|---|
| Monday | Sports Day | national |
| Date | Holiday | Scope |
|---|---|---|
| Monday | Sports Day | national |
Checked against the official list, .
Source: holidays Python library, checked . Library: holidays 0.105.
Same month in 20 cities
Hiroshima is warmer than 14 of our 20 cities in October by mean daily high. How we rank cities
Closest high and low in October: Barcelona (0.6 °C apart, equal), Osaka (0.6, equal), Tokyo (0.9).
| City | Gap from Hiroshima, °C | High, °C | Low, °C | Rain, mm | Sunshine, hours |
|---|---|---|---|---|---|
| Hiroshima (this page) | — | 23.7 | 14.9 | 109.2 | 178.6 |
| Barcelona (closest) | 0.6 | 22.7 | 15.0 | 83.5 | 162.7 |
| Osaka (closest) | 0.6 | 23.7 | 16.0 | 136.0 | 166.1 |
| Tokyo (closest) | 0.9 | 22.0 | 14.8 | 234.8 | 129.4 |
| Buenos Aires | 1.3 | 22.6 | 13.4 | 122.9 | 205.4 |
| Seville | 1.3 | 26.0 | 14.7 | 75.4 | 244.4 |
| Los Angeles | 1.4 | 25.9 | 15.5 | 14.7 | no data |
| Rome | 2.0 | 22.2 | 12.4 | no data | no data |
| Madrid | 3.8 | 20.0 | 11.1 | 64.2 | no data |
| New York | 4.9 | 18.1 | 10.8 | 111.3 | no data |
| Paris | 6.1 | 16.5 | 9.9 | 55.2 | 118.0 |
| London | 6.6 | 15.9 | 9.5 | 66.9 | no data |
| Hong Kong | 6.7 | 28.1 | 23.9 | 120.3 | 197.8 |
| Chicago | 7.1 | 17.1 | 7.4 | 87.1 | no data |
| Amsterdam | 8.1 | 14.7 | 7.7 | 86.7 | 116.9 |
| Vienna | 8.5 | 14.3 | 7.3 | 46.9 | 129.9 |
| Munich | 8.8 | 14.5 | 6.5 | 66.9 | 123.3 |
| Berlin | 9.0 | 14.0 | 6.6 | 43.9 | 115.0 |
| Singapore | 9.1 | 31.8 | 25.0 | 168.3 | no data |
| Prague | 9.5 | 13.9 | 5.8 | 36.0 | 108.0 |
Sources (1991-2020): WMO climate normals and NOAA U.S. Climate Normals, checked , ; Hong Kong: our 1991-2020 mean of the Hong Kong Observatory daily climate series on DATA.GOV.HK; Singapore: our 1991-2020 mean of the National Environment Agency monthly climate series on data.gov.sg; both checked . Each city's page names its station. All sources in full on Methodology.
Hong Kong figures: The Government of the Hong Kong Special Administrative Region and the Hong Kong Observatory own the intellectual property rights in the data; attribution to them and DATA.GOV.HK. Licence: Terms and Conditions of Use of DATA.GOV.HK, version 1.2.
Singapore figures: Contains information from the National Environment Agency on data.gov.sg, made available under the terms of the Singapore Open Data Licence version 1.0 (https://data.gov.sg/open-data-licence). The Agency does not endorse our means.
Sources
- WMO Member Nations (each national weather service's own submission); archived by NOAA National Centers for Environmental Information. Attribution: WMO Member Nations (2023). WMO Climatological Standard Normals for 1991-2020 (NCEI Accession 0253808). Station files named in each record. NOAA National Centers for Environmental Information. Dataset. https://doi.org/10.25921/800j-vn07. Accessed on the check date shown. Licence: No licence stated. Published by NOAA NCEI for WMO; citation requested. Checked .
- NOAA Solar Calculator equations, computed locally, NOAA Global Monitoring Laboratory (method); City by Month (computation). Attribution: Computed with the NOAA Solar Calculator method (no NOAA endorsement implied). Licence: Method, not data. Checked .
- holidays Python library, run locally. Attribution: holidays library, Vacanza team. Licence: MIT. Checked .
Cite this page: City by Month. "Hiroshima in October: weather, daylight, holidays". https://citybymonth.com/cities/japan/hiroshima/october/. Last updated 5 November 2026.