Here are some data provided by Stephanie Childs from her Wunderground trip planner weather report. Follow the link for more historical weather information.  These results are based on the previous 15 years of data (from 1995).

Temperature:

• The Average High Temperature is 73 F with a historical range of 42 F to 96 F
• The Average Low Temperature is 53 F with a historical range of 37 F to 67 F
• There is a 1% chance of a Hot Day (temperature over 90°F / 32°C).
• (1 day out of 88 in historical record)
• Most consecutive days found in historic record: 1
• There is a 92% chance of a Warm Day (temperature over 60°F / 16°C).
• (81 days out of 88 in historical record)
• Most consecutive days found in historic record: 7
• There is a 0% chance of a Freezing Day (temperature below 32°F / 0°C).
• (0 days out of 88 in historical record)
• Most consecutive days found in historic record: 0

Daily Precipitation:

• The Average Daily Precipitation is 0.16  with a historical range of 0.00  to 2.93 
• There is a 47% chance of a Precipitation Day.
• (41 days out of 88 in historical record)
• Most consecutive days found in historic record: 7