Even coins such as the Morgan and Peace Silver Dollars have a little bit of copper (90% silver, 10% copper.) The circulating gold coins have some copper, too (ranging from 8.5% to 10%.) You can also rule out Nickels (which are actually 75% copper!) There is 10% copper in the pre-1965 Dimes, Quarters and Half Dollars, and the Cent, of course, was ...
Average Temperatures in Hanoi, Vietnam. The average annual temperature in Hanoi, Vietnam is fairly hot at 24.1 degrees Celsius (75.4 degrees Fahrenheit). There is a variation of mean monthly temperatures of 13 Â°C (23.4Â°F) which is a low range. The mean diurnal temperature variation/ range is 7.1 Â°C (12.8 Â°F). The hottest month is very hot having a mean temperature of 30 degrees Celsius (86 degrees Fahrenheit). January is the coldest month (very mild) having an average temperature of 17 degrees Celsius (62.6 degrees Fahrenheit). Average Temperatures Table for Hanoi
Vietnam is geographically located in the tropical zone, with the top North region on temperate zone. Therefore, its climate is not consistent throughout the country. In fact, the weather varies significantly by latitude and longitude. The North (Hanoi, Halong Bay) is monsoonal with hot and rainy season from April to September and cool dry season from October to March. October and November are the best months to visit since you avoid the domestic tourist flow and also experience a more comfortable temperature and humidity compared with other months.