Uonuma Temperature by Month
The average annual maximum temperature in Uonuma, Niigata Prefecture, Japan is 17°C (63°F), with daytime highs ranging from 3°C (37°F) in January to 30°C (86°F) in August. This page covers monthly averages, day-night differences, and how Uonuma compares to cities worldwide.
Uonuma Monthly Temperatures
Depending on the time of the year, temperatures range from comfortable to cold in Uonuma. At night, minimum temperatures range from 21°C (70°F) in August to -3°C (27°F) in January.
The chart below illustrates the average maximum day and minimum night temperatures in Uonuma by month:
The coolest part of the day is typically between 4 AM and 6 AM, while 3 PM is usually the warmest, when solar heating is at its peak. August, the city's warmest month, averages 193 hours of sunshine.
The chart below shows the average temperature throughout the year:
Temperature: Uonuma vs Japan
The map below shows the annual temperature across Japan. You can also select individual months if you want to compare a specific time of year.
very warm
warm
pleasant
moderate
cold
very cold
Uonuma vs World: Temperature Compared
Uonuma's average annual maximum temperature is 17°C (63°F). To put that in context, here's how it compares to a few well-known destinations:
Athens, Greece sits at 23°C (73°F) on average, with hot dry summers and mild winters characteristic of the Mediterranean.
Reykjavík, Iceland averages 9°C (48°F) a year — mild summers by Icelandic standards, but cold winters and frequent wind.
San Francisco, USA averages 19°C (66°F) annually, but with little seasonal variation — summers are often cool and foggy, winters mild.
Melbourne, Australia averages 20°C (68°F) annually — known for unpredictable weather, with four seasons sometimes happening in one day.
Climate temperature data is typically calculated as a 30-year average. This smooths out year-to-year variability and gives a more reliable picture of what a place is actually like, rather than what happened in any single unusual year.
The readings come from a range of sources — land-based weather stations, ocean buoys, ships, and satellites. That data is collected by weather services around the world, then pooled, quality-checked, and averaged to produce the climate records you see here.
Global average temperatures have risen by around 1.2°C since the pre-industrial era, and the effects are visible across many regions. Winters are milder on average, with fewer frost days and less snow in many parts of the world. Heatwaves are more frequent and more intense, and Europe's summers of 2018, 2019, and 2020 all set records.
Summers are also getting drier in some areas, while winter rainfall has increased in others. This contributies to higher river levels and more flooding. In many countries, spring arrives earlier and autumn lasts longer. It has knock-on effects for wildlife, agriculture, and local ecosystems.
For more on Uonuma's weather — including monthly rainfall, sunshine hours, and humidity — visit our Uonuma climate page.
