May sees warm temperatures in West Virginia with comfortable days and nights as the spring weather blesses the state. The average high temperatures are in the pleasant 65°F (18.3°C) to 75°F (23.9°C) zone, while the average low temperatures are in the warm 40°F (4.4°C) to 55°F (12.8°C) range. Sunshine increases in the state, especially in the southern part, as the average number of days with sunshine increases to 15. The sunrays are up to 50% of peak strength as cloud cover and rain both are common. Rainfall is to the tune of 4" (102mm) to 5" (127mm), and snow disappears from the ground, ending the skiing season. Mountain trails are open everywhere by the end of spring, and there is a buzz of activities like white water rafting, hiking, and biking. The first of the thunderstorms are likely to hit in May, so be cautious in the highlands where there is no cover from the rain! Mid to late spring is the start of the peak tourist season and the resultant swelling of crowds in West Virginia.