Transmutation [Cold]
Level: Cleric 6, Druid 5
Components: V, S
Casting Time: 1 minute
Range: 1 mile
Area: 1-mile-radius circle centered on you
Duration: 2d4 hours
Saving Throw: None
Spell Resistance: No
As you call upon divine power to fuel your spell, you feel the air around you become chilled. The drop in temperature creates a thin fog that exacerbates the cold in the air without hindering your vision or movement whatsoever.
This spell causes a powerful cold front to form, lowering the temperature in the affected area by 5 degrees Fahrenheit per caster level (maximum change of 50 degrees Fahrenheit), to a maximum low of –20 degrees Fahrenheit (see Cold Dangers). Spells with the cold descriptor deal an extra 1 point of damage per die when cast in the area.
Source: Spell Compendium, page 50.