The Nimba Range has a sub-equatorial montane climate. Temperature changes extremely with altitude, with a daytime maximum ranging between 24 °C and 33 °C, and the nightly minimum can fall below 10 °C. Some parts of the reserve receive significantly less precipitation, due to rain-shadow effect of the high ridge. In general, southern slopes are moister than the leeward northern ones which are affected by dry Harmattan wind from the Sahara. The Nimba Range, as well as the reserve has exceptional microclimatic diversity.