Temwanjera started the 2009–10 season with a double in Vaslui's opening game against Omonia Nicosia. On 23 August, he scored his first league goal against Gloria Bistriţa, giving his team a 2–1 lead. Vaslui eventually won with 3–1. On 23 September, he scored his second double from the season, in the cup match against Chimia Brazi. On 3 October, Temwanjera scored his team's second goal in Marius Lăcătuş's first competitive match as manager, in Vaslui's 3–1 home win over Astra Ploieşti. On 7 November, he scored the winning goal against Ceahlăul Piatra Neamţ. On 23 November, Temwanjera scored Vaslui's first goal, from the 2–0 home league win against CFR Cluj, helping his team winning the eighth match in a row. On 27 February 2010, he suffered a meniscal laceration, in the 2–1 home league win against Pandurii Târgu Jiu, which forced him out from the field for almost nine months.