This study aimed to determine whether the hours of sunshine and/or the amount of precipitation affect the number of cows and heifers that will show oestrus in the following days and the extent to which these climatic elements affect the average number of artificially inseminated cows and heifers per day. During the course of three consecutive years, a total of 21,043 cows and heifers were artificially inseminated in Koprivnica-Križevci County, Croatia. Descriptive statistics, analysis of variance, and Tukey pairwise comparisons were performed between the number of artificially inseminated cows and heifers, cloud cover, rain intensity, and number of days after rain. Significant differences were recorded in relation to cloud cover and the average number of cows and heifers artificially inseminated per day. The average number of artificially inseminated cows and heifers per day did not differ significantly among seasons (p>0.05). Significant differences were observed in the number of artificially inseminated cows and heifers per day in relation to rain (1, 2, 3, 4 or more days after rain) and in relation to the amount of precipitation (dry, light rain, rain, heavy rain, extreme rain). We can conclude that in a temperate climate, significantly fewer cows and heifers were in natural oestrus and artificially inseminated on rainy or cloudy days, while significantly more cattle were artificially inseminated on dry days following rain and on days with more hours of sunshine, regardless of season.