According to the search results, the CP of a 100 IV Eevee depends on its level and whether it is boosted by weather. The following are the CP values for a 100 IV Eevee at different levels:
- Level 15: 424 CP - 459 CP
- Level 20: 565 CP - 612 CP
- Level 25 (weather-boosted): 707 CP - 765 CP
- Level 30 (non-boosted): 830 CP
- Level 35 (weather-boosted): 918 CP
Its important to note that each of these CPs only represents the chance that the Eevee has 100% IV. To confirm if an Eevee has 100% IV, players should use the appraisal feature.