Climate

Romania has a temperate climate, similar to the northeastern United States, with four distinct seasons.
Spring is pleasant with cool mornings and nights and warm days.
Summer is quite warm, with extended sunny days. The hottest areas in summer are the lowlands in southern and eastern Romania where 100 F is often reached in July and August. Temperatures are always cooler in the mountains.
Autumn is dry and cool, with fields and trees producing colorful foliage, much like New England.
Winters can be cold, especially in the mountains. While not the rule, abundant snowfalls may occur throughout the country, from December to mid-March.
There are significant regional differences of the climate between different regions of Romania.
Weather history for Bucharest - www.wunderground.com/history/...

Average temperatures (°F)

Month	Bucharest	Western Romania	Central Romania	The Black Sea Coast
January	26	28	34	31
February	31	34	34	34
March	40	41	42	39
April	52	52	52	55
May	62	61	61	66
June	69	67	66	75
July	71	67	69	79
August	70	65	69	79
September	65	65	65	70
October	53	53	55	62
November	41	43	45	52
December	34	34	36	43

The above temperatures are averages. Please keep in mind that variances can be as high as +/- 60°F at midday during the Summer or over night during the Winter.
Romania Weather Forecast - www.weather.com/...
Bucharest Weather Forecast - http://www.weather.com/outlook/travel/businesstraveler/local/...
Facts about Romania's climate:

Warmest month: July
Coldest month: January
Record High Temperature:
44.5°C (112°F) - August 10, 1951 South-Eastern Romania
Record Low Temperature:
-38.5°C (-37.3°F) - January 24, 1942 (Central Romania)
Average annual Rainfall: 26 inches.