Cold Snap

(Spell Compendium, page 50, DnD 3.5)

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, DMG 302). Spells with the cold descriptor deal an extra 1 point of damage per die when cast in the area.