Click on a day for an hourly weather forecast
The weather in Mammoth in May is very cold with temperatures between -3°C and 9°C, warm clothes are a must.
There’s going to be many days of rain during the month of May in Mammoth.
Mammoth should expect an average of 15 to 22 days of rain, so be sure to bring along a waterproof jacket to stay dry this month!
Let it snow! You can expect Mammoth to be covered in white during the month of May. Be sure to bundle up when you venture outside, or take the opportunity to enjoy hot cocoa by the fire for warmth this month.
Our weather forecast can give you a great sense of what weather to expect in Mammoth in May 2025.
If you’re planning to visit Mammoth in the near future, we highly recommend that you review the 14 day weather forecast for Mammoth before you arrive.
| Month | Temperatures | Rainy Days | Dry Days | Snowy Days | Rainfall | Weather | More details |
|---|---|---|---|---|---|---|---|
| January | -6° / -15° | 3 | 5 | 24 | 112 mm | Awful | Mammoth in January |
| February | -6° / -15° | 4 | 1 | 25 | 118 mm | Awful | Mammoth in February |
| March | -1° / -11° | 6 | 1 | 27 | 129 mm | Awful | Mammoth in March |
| April | 2° / -8° | 7 | 2 | 26 | 141 mm | Awful | Mammoth in April |
| May | 9° / -3° | 15 | 2 | 22 | 163 mm | Awful | Mammoth in May |
| June | 16° / 3° | 10 | 11 | 8 | 113 mm | Bad | Mammoth in June |
| July | 22° / 7° | 6 | 25 | 1 | 56 mm | Good | Mammoth in July |
| August | 21° / 6° | 7 | 23 | 1 | 67 mm | Ok | Mammoth in August |
| September | 16° / 3° | 6 | 19 | 5 | 76 mm | Ok | Mammoth in September |
| October | 6° / -4° | 7 | 7 | 17 | 94 mm | Awful | Mammoth in October |
| November | -2° / -10° | 4 | 6 | 21 | 100 mm | Awful | Mammoth in November |
| December | -7° / -16° | 3 | 3 | 25 | 111 mm | Awful | Mammoth in December |