October weather forecastHiroshima, Japan
October
Weather in October
October's weather in Hiroshima is notably cooler than September with temperatures reflecting strong autumnal vibes. A significant drop in rainfall, down to 88mm (3.46"), makes October a drier month compared to the preceding monsoon months. Daylight shrinks further than earlier in the year, marking the progress of autumn. Despite the shorter daylight hours, a fair amount of sunshine persists adding to the charm of autumn in Hiroshima. The UV index lowers even more, providing a pleasant atmosphere for outdoor activities without the worry of strong sun exposure.Temperature
The onset of October in Hiroshima, Japan, comes with a shift in the average high-temperature, falling from a moderately hot 29°C (84.2°F) in September to a still warm 23.4°C (74.1°F). During October, Hiroshima experiences a consistent low-temperature average of 14.2°C (57.6°F).Humidity
The average relative humidity in October in Hiroshima is 68%.Rainfall
In October, the rain falls for 12 days. Throughout October, 88mm (3.46") of precipitation is accumulated. In Hiroshima, during the entire year, the rain falls for 190 days and collects up to 1538mm (60.55") of precipitation.Snowfall
In Hiroshima, snow does not fall in April through November.Sea temperature
In October, the average sea temperature is 23.2°C (73.8°F).Note: If someone is sensitive to cold, the enjoyment of swimming in 23.2°C (73.8°F) water hinges on factors like sunshine, wind, and the current air temperature. (For context: Olympic swimming competitions are held in water temperatures of 25°C (77°F) to 28°C (82.4°F).)
Daylight
The average length of the day in October is 11h and 20min.On the first day of October, sunrise is at 06:04 and sunset at 17:54. On the last day of the month, sunrise is at 06:29 and sunset at 17:18 JST.
Sunshine
In Hiroshima, the average sunshine in October is 5.9h.UV index
In October, the average daily maximum UV index is 6. A UV Index value of 6 to 7 symbolizes a high health hazard from exposure to the Sun's UV rays for the ordinary person.Note: The maximum daily UV index of 6 during October translates into the following directions:
Uphold preventive measures and conform to sun safety guidelines. Defending against skin and eye harm is crucial. UV radiation from the sun is at its strongest between 10 a.m. and 4 p.m. Try to limit direct exposure during these hours. A hat with a broad brim is indispensable, filtering out up to half of UV rays. Take caution! The UV rays from the Sun gain strength from sand and water reflections.
Published by: Weather Atlas | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in October
Hiroshima, Japan
- Average high temperature in October: 23.4°C
The warmest month (with the highest average high temperature) is August (32.5°C).
The month with the lowest average high temperature is January (9.7°C).
- Average low temperature in October: 14.2°C
The month with the highest average low temperature is August (24.8°C).
The coldest month (with the lowest average low temperature) is January (1.7°C).
Average humidity in October
Hiroshima, Japan
- Average humidity in October: 68%
The month with the highest relative humidity is July (74%).
The month with the lowest relative humidity is April (63%).
Average rainfall in October
Hiroshima, Japan
- Average rainfall in October: 87.9mm
The wettest month (with the highest rainfall) is July (258.6mm).
The driest month (with the least rainfall) is December (41.2mm).
Average rainfall days in October
Hiroshima, Japan
- Average rainfall days in October: 12 days
The month with the highest number of rainy days is January (19 days).
The month with the least rainy days is October (12 days).
Average snowfall in October
Hiroshima, Japan
- Average snowfall in October: 0mm
The month with the highest snowfall is January (50mm).
The months with the least snowfall are April, May, June, July, August, September, October and November (0mm).
Average snowfall days in October
Hiroshima, Japan
- Average snowfall days in October: 0 days
The month with the highest number of snowfall days is January (8.7 days).
The months with the least snowfall days are April, May, June, July, August, September and October (0 days).
Average sea temperature in October
Hiroshima, Japan
- Average sea temperature in October: 23.2°C
The best month for swimming (with the highest average sea temperature) is August (26.8°C).
The coldest month (with the lowest average sea temperature) is February (12.4°C).
Average daylight in October /
Average sunshine in October
Hiroshima, Japan
- Average daylight in October: 11h and 18min
The month with the longest days is June (Average daylight: 14h and 24min).
The month with the shortest days is December (Average daylight: 9h and 54min).
- Average sunshine in October: 5h and 54min
The month with the most sunshine is August (Average sunshine: 6h and 48min).
The month with the least sunshine is January (Average sunshine: 4h and 24min).
Average UV index in October
Hiroshima, Japan
- Average UV index in October: 6
The month with the highest UV index is July (UV index 11).
The months with the lowest UV index are January and December (UV index 3).
