Generally, SPF values remained stable throughout the whole period of study. However, when the sunscreen was exposed to the temperature at 8 ±2 C, upon 3 days, a slight decrease of approximately 5% in SPF was identified (P < 0.05) compared to the initial SPF value. A similar SPF reduction (6.5%) was perceived in the group of 25+ 2 C, when comparing initial SPF with the one measured on day 28 (P < 0.05). Nevertheless, in spite of the statistical significance of the values, these determinations do not compromise the general trend of results, which indicate the maintenance of the SPF. The SPF variation of formulations F1, F2, F3 and F4 at 8+ 2 C, 25 +2 C and 40 C+2 C, upon 28 days of exposition, was obtained by comparison with the fresh sample not subjected to temperature effect, assumed as 100%. In fact, final SPF does not display accentuated alterations either when comparing the result of the experimental groups with the initial SPF or when comparing experimental groups themselves. An exception occurs for the maximum average temperature as compared to the initial SPF value, as previously referred, which is significant (P