Generally, laboratory temperature and humidity conditions are governed by the requirements of sophisticated analytical instruments such as FTIR, HPLC, LC-MS/MS, NMR, AAS, and others which are sensitive to the temperature conditions in the surroundings in the laboratory. Therefore, the temperature is usually maintained between 20-25 deg. C in the laboratory.
For the temperature of 25.9 deg C, you may seek advice from the manufacturers of the sophisticated instruments installed in your laboratory, whether this high temperature will be acceptable.
For other areas in the laboratory (such as the wet chemistry laboratory section) the excursion in the temperature up to 25.9 deg. C for a short period should be ok. Please specify these aspects in your internal SOP of Laboratory Management.