Click on a day for an hourly weather forecast
The weather in Snoqualmie Pass in May is very cold with temperatures between -1°C and 15°C, warm clothes are a must.
You can expect rain for roughly half of the month of May in Snoqualmie Pass. We’re expecting roughly 8 to 15 days of rain, so your rubber boots and umbrella are going to see plenty of use this month if you’re keen on staying dry.
You can expect a few days of snow in Snoqualmie Pass during May. It’s important to get out your snow boots and warm mittens to stay warm while you explore Snoqualmie Pass.
Our weather forecast can give you a great sense of what weather to expect in Snoqualmie Pass in May 2025.
If you’re planning to visit Snoqualmie Pass in the near future, we highly recommend that you review the 14 day weather forecast for Snoqualmie Pass before you arrive.
| Month | Temperatures | Rainy Days | Dry Days | Snowy Days | Rainfall | Weather | More details |
|---|---|---|---|---|---|---|---|
| January | -1° / -10° | 12 | 4 | 18 | 374 mm | Awful | Snoqualmie Pass in January |
| February | 2° / -10° | 12 | 2 | 19 | 331 mm | Awful | Snoqualmie Pass in February |
| March | 4° / -7° | 14 | 3 | 18 | 311 mm | Awful | Snoqualmie Pass in March |
| April | 8° / -4° | 13 | 6 | 12 | 193 mm | Awful | Snoqualmie Pass in April |
| May | 15° / -1° | 12 | 17 | 3 | 150 mm | Bad | Snoqualmie Pass in May |
| June | 19° / 1° | 7 | 23 | 0 | 101 mm | Ok | Snoqualmie Pass in June |
| July | 24° / 3° | 3 | 28 | 0 | 35 mm | Perfect | Snoqualmie Pass in July |
| August | 24° / 4° | 3 | 28 | 0 | 45 mm | Perfect | Snoqualmie Pass in August |
| September | 20° / 2° | 7 | 23 | 0 | 109 mm | Ok | Snoqualmie Pass in September |
| October | 12° / -2° | 11 | 17 | 2 | 281 mm | Awful | Snoqualmie Pass in October |
| November | 4° / -7° | 15 | 5 | 13 | 337 mm | Awful | Snoqualmie Pass in November |
| December | -1° / -11° | 12 | 3 | 21 | 349 mm | Awful | Snoqualmie Pass in December |