Showers are expected to begin Saturday morning in Windsor, with cloudy skies continuing through the day, according to Environment Canada. The high is expected to reach 21 C, with a UV index of 3, or moderate. Showers will continue Saturday night, with a risk of thunderstorms and a local rainfall amount of 15 to 25 millimetres. The overnight low will be 14 C. Sunday will remain cloudy, with a 70 per cent chance of showers and a high of 19 C, according to Environment Canada. Sunday night will be cloudy with a 30 per cent chance of showers and a low of 11 C.