Here is a good site to bookmark for a look at historical weather data:
http://www.wunderground.com/tripplanner/index.asp
I plugged in May 9 - May 18 for Orlando and got the following:
Temperature:
The Average High Temperature is 88 F with a historical range of 72 F to 94 F
The Average Low Temperature is 67 F with a historical range of 55 F to 73 F
There is a 38% chance of a Hot Day (temperature over 90°F / 32°C).
(57 days out of 150 in historical record)
Most consecutive days found in historic record: 8
There is a 0% chance of a Freezing Day (temperature below 32°F / 0°C).
(0 days out of 150 in historical record)
Most consecutive days found in historic record: 0
Daily Precipitation:
The Average Daily Precipitation is 0.13 with a historical range of 0.00 to 1.24
There is a 29% chance of a Precipitation Day.
(44 days out of 150 in historical record)
Most consecutive days found in historic record: 9
Cloud Cover:
Average Cloud Cover is mostly sunny
There is a 15% chance of a Cloudy Day.
(23 days out of 150 in historical record)
Most consecutive days found in historic record: 3
Wind:
The Average Wind is 6 mph with a historical range of 0 mph to 14 mph
There is a 7% chance of a Windy Day (average wind over 10 mph / 15km/h).
(11 days out of 150 in historical record)
Most consecutive days found in historic record: 3
Humidity:
The Average High Dew Point is 69 F with a historical range of 60 F to 76 F
The Average Low Dew Point is 60 F with a historical range of 43 F to 70 F
There is a 98% chance of a Humid Day (dew point over 65°F / 18°C).
(147 days out of 150 in historical record)
Most consecutive days found in historic record: 9
There is a 39% chance of a Sweltering Day (dew point over 70°F / 21°C).
(58 days out of 150 in historical record)
Most consecutive days found in historic record: 9