Iași experiences a humid continental climate with hot, sunny summers and cold, snowy winters. Summer highs reach 27–29°C, while winter lows can drop below -6°C. Rain falls year-round, peaking in late spring and early summer. Sunshine is most abundant from May to August, making Iași a vibrant destination with distinct seasons for travellers.
The best times to travel section shows how the months compare for a visit, so you can find the time of year that fits what you want to do.
Background colours of the months:
The colour shows the typical temperature: yellow (hot), green (mild) and blue (cold). How strong the colour is shows the travel season: full colour means high season, soft colour means shoulder season and soft-striped means off season.
Weather symbols:
Each month has one symbol showing what the weather is typically like, such as hot and sunny, freezing or a rainy or snowy season. Use them to quickly spot months that match the weather you want, or to avoid the ones that don't.
Crowdedness:
The people icon shows how busy the place usually is. The more people, the more crowded it gets.
Additional notes:
The grey info boxes point out special things worth knowing, like recurring weather issues or seasonal events.
Iași, located in northeastern Romania, enjoys four distinct seasons characterised by wide temperature swings and moderate precipitation. Summers (June–August) are warm to hot, with average highs of 27–29°C and occasional heatwaves pushing temperatures above 35°C. Nights are comfortable, and humidity remains moderate. Thunderstorms are common in June and July, which are also the wettest months, each receiving around 70–80 mm of rain. Sunshine is abundant, with 8–9 hours of sun per day and long daylight hours, making this period ideal for festivals and outdoor activities.
Winters (December–February) are cold and often snowy, with average highs of 0–3°C and lows frequently dipping below -6°C. Snowfall is common, especially in January and February, and frost can occur from November to March. Days are short and often cloudy, with just 2–3 hours of sunshine. Spring (March–May) and autumn (September–November) are transitional, bringing mild temperatures (15–23°C in spring, 10–22°C in autumn), blooming or colourful landscapes, and moderate rainfall. May and June are the rainiest months, while January is the driest. Winds are generally light to moderate, and humidity peaks in winter, reaching up to 85%.
| Average climate data for Iași, Romania | |||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Month | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | Year |
| Average maximum temperature (°C) | -0 | 2 | 8 | 17 | 22 | 25 | 27 | 26 | 23 | 16 | 8 | 3 | 27 |
| Average minimum temperature (°C) | -7 | -5 | -1 | 5 | 11 | 14 | 15 | 14 | 11 | 6 | 1 | -3 | -7 |
| Average precipitation (mm) | 32 | 31 | 31 | 53 | 63 | 101 | 82 | 56 | 48 | 25 | 35 | 31 | 587 |
| Average rainfall days (days) | 6 | 6 | 6 | 8 | 8 | 9 | 9 | 5 | 5 | 5 | 6 | 7 | 80 |
| Average snowfall (mm) | 114 | 144 | 120 | 70 | 0 | 0 | 0 | 0 | 0 | 7 | 105 | 62 | 622 |
| Average daily daylight hours (h) | 9 | 10 | 11 | 13 | 15 | 15 | 15 | 14 | 12 | 10 | 9 | 8 | 12 |
| Average daily sunshine hours (h) | 2 | 2 | 4 | 5 | 7 | 8 | 8 | 8 | 6 | 5 | 2 | 1 | 5 |
| Average UV index | 1 | 2 | 3 | 4 | 6 | 7 | 7 | 7 | 5 | 3 | 1 | 1 | 4 |
The best time to visit Iași is from May to September, when temperatures are warm (20–29°C), days are long, and the city is lively with festivals and outdoor events. These months offer the most sunshine and comfortable evenings, ideal for sightseeing, exploring parks, and enjoying the vibrant city life.
The least favourable time to visit is from November to February, when days are shortest, temperatures are coldest (highs of 0–3°C, lows below -6°C), and rain or snow is frequent. Outdoor activities are limited, but the city’s museums and cafés offer cosy refuge from the chilly, damp weather.
Iași has hot, sunny summers (highs 27–29°C) and cold, snowy winters (highs 0–3°C, lows below -6°C). Rain falls year-round, peaking in late spring and early summer, and the city enjoys distinct seasons.
Yes, snow is common from December to February, though heavy accumulation is rare in the city. Most winter precipitation falls as snow or sleet, and frosty mornings are frequent.
May and June are typically the wettest months, with up to 80–100 mm of rain and 12–14 rainy days. Rain is moderate in spring and autumn, while summer is drier except for brief thunderstorms.
Iași enjoys up to 9 hours of sunshine daily in July and August. Annual sunshine averages around 2,000 hours, with the sunniest months from May to August and the least sunshine in December and January.
Pack warm, waterproof layers for winter and spring, and light clothes plus sun protection for summer. Even in summer, evenings can be cool. Always bring layers, as weather can change quickly.
Yes, late spring to early autumn is ideal for outdoor activities, with mild to warm temperatures, long days, and lively parks. Winter is best for cosy indoor experiences and exploring historic sites.
While not a seaside city, Iași has riverfront areas and lakes for summer relaxation. Local swimming spots and pools are popular in hot weather, but always check water quality and safety.
The warmest month, with the highest average maximum temperature, is July (26.8 °C). The month with the lowest average maximum temperature is January (-0.2 °C). Overall, the average maximum temperature over the whole year is 14.8 °C.
The month with the highest average minimum temperature is July (15.1 °C). The coldest month, with the lowest average minimum temperature, is January (-6.9 °C). Overall, the average minimum temperature over the whole year is 5 °C.
The wettest month, with the highest amount of precipitation, is June (100.6 mm). The driest month, with the least amount of precipitation, is October (25 mm). Over the whole year there are 587 mm of rainfall on average.
The month with the most days of rain is June (9.1 days). The month with the fewest days of rain is September (4.9 days). Over the whole year there are 79.7 days of rain on average.
The month with the most snowfall is February (144.4 mm). The months with the least snowfall are May, June, July, August and September (0 mm). Over the whole year there are 622 mm of snowfall on average.
The month with the longest days, so the most daylight, is June (Average daylight: 15.1 h). The month with the shortest days, so the least daylight, is December (Average daylight: 8.1 h). Over the whole year there are 11.8 h of daylight per day on average.
The month with the most sunshine per day is July (Average sunshine: 8.2 h). The month with the least sunshine per day is December (Average sunshine: 1.2 h). Over the whole year there are 4.9 h of sunlight per day on average.
The months with the highest average UV index are June, July and August (UV index: 7). The months with the lowest average UV index are January, November and December (UV index: 1). Over the whole year the average UV index is 3.9.
