Climate Insights for Iaşi

The climate in Iaşi is temperate. The average annual temperature is 12°C and approximately 580mm of precipitation falls per year. June is the wettest month, receiving around 105mm of rainfall. Iaşi is in the Northern Hemisphere. Summer begins at the end of June and lasts through September. The summer months are: August, July, June. The coldest months are January, February, December, when temperatures can drop to -6°C. Snowfall occurs from January to December, with around 78cm accumulating over the season.

Temperatures in Iaşi vary considerably across the year, with a 35°C difference between the coldest and warmest months. The warmest month is August, when average highs reach 29°C and the mean temperature sits around 23°C. The coldest month is January, when overnight lows fall to -6°C and the daily average is -2°C. On average, daily temperatures fluctuate by about 9°C between overnight lows and afternoon highs. The sharpest temperature change occurs between September and October, with a 7°C shift in average temperatures.

Iaşi is a relatively dry area, receiving approximately 580mm of precipitation annually, which averages out to around 48mm per month. The wettest month is June, averaging 105mm of rainfall. May and October also tend to see above-average precipitation. The driest month is August, with just 29mm. That's 77mm less than June, the wettest month. Precipitation varies noticeably between seasons, with the first half (January to June) of the year generally seeing more rainfall. Snowfall is a regular feature from January to December, with around 78cm accumulating over the season. January typically sees the most snow at around 24cm.

Iaşi is relatively calm, with an average annual wind speed of 3km/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 June, 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.

It is currently summer in Iaşi, which began on June 21, 2026. Iaşi 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 29°C, while the coldest stretch bottoms out in January near -6°C. Autumn is next, beginning on September 23, 2026 — 93 days from now.

The best time to visit Iaşi is during May, July, August and September, when the weather is most comfortable for travellers. During these months, average temperatures hover around 20°C with modest rainfall averaging 47mm per month. By contrast, January can be quite cold with temperatures dropping to -6°C. A light rain jacket is recommended, though showers are generally brief and shouldn't disrupt your plans.

The table below shows monthly climate averages for Iaşi 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.