Climate Overview
The climate in Ōmiya is temperate. The average annual temperature is 15°C and approximately 1403mm of precipitation falls per year. Ōmiya receives a notable amount of rainfall throughout the year, including during its driest month. Ōmiya is in the Northern Hemisphere. Summer begins at the end of June and lasts through September. The summer months are: August, July, September. The coldest months are January, February, December, when temperatures can drop to 0°C. Light snow can occur between January and November.
Temperature
Temperatures in Ōmiya vary considerably across the year, with a 31°C difference between the coldest and warmest months. The warmest month is August, when average highs reach 31°C and the mean temperature sits around 27°C. The coldest month is January, when overnight lows fall to 0°C and the daily average is 4°C. Daily temperature variation is modest, with an average difference of 8°C between highs and lows. The sharpest temperature change occurs between September and October, with a 6°C shift in average temperatures.
Precipitation
Ōmiya is a fairly wet location, receiving approximately 1403mm of precipitation annually, which averages out to around 117mm per month. The wettest month is October, averaging 192mm of rainfall. July and September also tend to see above-average precipitation. The driest month is December, with just 39mm. That's 152mm less than October, the wettest month. Precipitation varies noticeably between seasons, with the second half (July to December) of the year generally seeing more rainfall. Light snowfall can occur between January and November, totalling around 35cm annually. January is the snowiest month with approximately 16cm.
Wind
Ōmiya is relatively calm, with an average annual wind speed of 2km/h. For context, sustained winds below 12km/h are generally light, while anything above 25km/h is considered strong. The windiest month is April, averaging 3km/h, though still comfortable for most outdoor activities. The calmest conditions occur in July, with average winds dropping to 2km/h, making it an ideal period for wind-sensitive activities. Wind conditions are fairly consistent throughout the year, varying by only 1km/h between the calmest and windiest months.
Seasons
92 days until Autumn
It is currently summer in Ōmiya, which began on June 21, 2026. Ōmiya is in the Northern Hemisphere, where spring begins in March, summer in June, autumn in September, and winter in December. The warmest period peaks in August at around 31°C, while the coldest stretch bottoms out in January near 0°C. Autumn is next, beginning on September 23, 2026 — 92 days from now.
Spring
Temperatures range from 4 to 24°C. Rainfall is heavy, totalling around 344mm across the season with a monthly average of 115mm. Winds are generally light, averaging 2km/h. An umbrella or waterproof jacket is advisable as spring showers are frequent.
Summer
Temperatures range from 18 to 31°C. Rainfall is heavy, totalling around 483mm across the season with a monthly average of 161mm. Winds are generally light, averaging 2km/h. Light, breathable clothing is ideal — perfect conditions for outdoor activities.
Autumn
Temperatures range from 7 to 26°C. Rainfall is heavy, totalling around 428mm across the season with a monthly average of 143mm. Winds are generally light, averaging 2km/h. A waterproof jacket and sturdy footwear are recommended as rain becomes more frequent.
Winter
Temperatures range from 0 to 10°C. Rainfall is relatively light, with around 148mm over the season and a monthly average of 49mm. Expect around 25cm of snow accumulation during this period. Winds are generally light, averaging 2km/h. Warm winter clothing and waterproof boots are a must, and travel may be affected by snow.
Monthly Climate Data
The table below shows monthly climate averages for Ōmiya based on historical weather data. Min and max temperatures represent typical overnight lows and afternoon highs for each month, shown in degrees Celsius (°C). Precipitation is measured in millimetres (mm) and indicates the average total rainfall per month. Snow is measured in centimetres (cm) and reflects average monthly snowfall accumulation. Wind speed is the average sustained speed in kilometres per hour (km/h). All values are based on averages from over 10 years of historical weather data. The current month is highlighted for quick reference.
