If you’re looking forward to lots of outings with your partner, take a look at these details about year-round temperatures in Nauvoo: The hottest months are usually July and August, with an average temperature of 23°C, while the coldest months are January and February, with an average of 0°C. The snowiest months in Nauvoo are January, December, November and February, with each month seeing an average of 15 cm of snowfall.