What will the weather be like?

Visitors should be aware that mountain weather is very changeable. Be prepared for unseasonable weather at all times of the year.
Average Monthly Temperatures at Mount Rainier:

Paradise
(5400 ft/1647 m)
Longmire(2762 ft/825 m) Ohanapecosh
(1950 ft/560 m)
High Low High Low High Low
°F/°C °F/°C °F/°C °F/°C °F/°C °F/°C
January 33 / 0.5 21 / -6 36 / 2 24 / -4 39 / 4 30 / -1
February 35 / 2 22 / -6 40 / 4 26 / -3 41 / 5 30 / 1
March 37 / 3 22 / -6 44 / 7 28 / -2 42 /6 32 / 0
April 44 / 7 27 / -3 53 / 12 32 / 0 58 / 14 35 / 2
May 50 / 10 32 / 0 62 / 17 37 / 3 70 / 21 41 / 5
June 56 / 14 44 / 7 66 / 19 43 / 6 77 / 25 45 / 7
July 64 / 18 44 / 7 75 / 24 47 / 8 78 / 23 49 / 9
August 63 / 17 43 / 6 74 / 23 47 / 8 81 / 27 48 / 9
September 57 / 14 39 / 4 68 / 20 43 / 6 72 / 22 43 / 6
October 48 / 9 33 / 0.5 57 / 14 38 / 3 57 / 14 36 / 2
November 41 / 5 37 / 3 45 / 7 31 / -0.5 39 / 4 27 / -3
December 34 / 1 22 / -6 39 / 4 28 / -2 34 / 1 23 / -5