You can plant your beet seeds 3 weeks before your last frost date, and again about 2 weeks after the frost date for a second crop. Your seeding and spacing are somewhat dependent on how you plan on using your beets.
Philadelphia: Annual Weather Averages. July is the hottest month in Philadelphia with an average temperature of 26Â°C (79Â°F) and the coldest is January at 2Â°C (36Â°F) with the most daily sunshine hours at 10 in July. The wettest month is July with an average of 114mm of rain.
Summers are pleasantly warm. During the warmest part of the day temperatures are just below 30 degrees Celsius (86 degrees Fahrenheit). Climate information The figures below are based on long term weather and climate records. They are an average for Philadelphia: