Climate of Moscow
Moscow has a humid continental climate with warm, sometimes hot, somewhat humid summers and long, cold winters. Typical high temperatures in the warm months of June, July and August are around 23 °C (73 °F), but during heat waves, which can occur anytime from May to September, daytime temperature highs often top 30 °C (86 °F) for sometimes one or two weeks.
In the winter, temperatures normally drop to approximately −10 °C (14 °F), though there can be periods of warmth with temperatures rising above 0 °C (32 °F). Summer lasts from mid-May to the beginning of September. Winter lasts from the beginning of November to the end of March.
You can check current temperature in Moscow here.