Winters in Kawartha Lakes are cold, with temperatures often below freezing, averaging around -4°C in January and February. As the season progresses, temperatures gradually rise, reaching averages of 1°C by March. Spring brings a significant warming trend, with April and May temperatures frequently above 10°C, and occasional heatwaves pushing into the mid-30s. Summer is warm to hot, with July and August averaging around 22°C, although overnight lows can still dip below 10°C. Autumn is generally mild, with temperatures gradually cooling from September's highs of around 16°C to November's averages of just above freezing.