Studied mental performance in high school students under different weather conditions. Deterioration, perception, attention, memory, and thinking have been found to impair them. The mental capacity of 15-year-old students at type I was 0.90 ± 0.04 ppm, and for type III it was significantly lower – 0.78 ± 0.03 ppm than for I and II types; for students of 16 years under conditions of type I the weather was 0.94 ± 0.02 ppm, for II it was probably worse, compared to the values for type I (0.86 ± 0.02 ppm), and for type III its values were 0.80 ± 0.02 ppm, which is probably less than those of type I meteosituations; in high school students of 17 years at the first type of weather the mental capacity coefficient reached 0.89 ± 0.02 ppm, and at the third type it probably decreased to 0.74 ± 0.03 ppm, compared to the values at the meteorological ​​ situations I and II types. The age and gender peculiarities of mental performance revealed by us in different weather conditions should be taken into account in differentiating training and predicting work efficiency.