If you’re hoping to get lost in the rain on your romantic getaway, take a look at these details about year-round temperatures in North Platte: The hottest months are usually July and August, with an average temperature of 23°C, while the coldest months are February and January, with an average of 0°C. The snowiest months in North Platte are March, December, November and January, with each month seeing an average of 25 cm of snowfall.