Click on a day for an hourly weather forecast
The temperatures in Chilliwack in August are quite cold with temperatures between 7°C and 25°C, warm clothes are a must.
You can expect about 3 to 8 days of rain in Chilliwack during the month of August. It’s a good idea to bring along your umbrella so that you don’t get caught in poor weather.
Our weather forecast can give you a great sense of what weather to expect in Chilliwack in August 2025.
If you’re planning to visit Chilliwack in the near future, we highly recommend that you review the 14 day weather forecast for Chilliwack before you arrive.
| Month | Temperatures | Rainy Days | Dry Days | Snowy Days | Rainfall | Weather | More details |
|---|---|---|---|---|---|---|---|
| January | 4° / -4° | 15 | 12 | 5 | 370 mm | Awful | Chilliwack in January |
| February | 5° / -5° | 13 | 8 | 7 | 265 mm | Awful | Chilliwack in February |
| March | 7° / -3° | 18 | 9 | 5 | 349 mm | Awful | Chilliwack in March |
| April | 11° / -1° | 14 | 15 | 1 | 219 mm | Bad | Chilliwack in April |
| May | 17° / 2° | 10 | 21 | 0 | 170 mm | Ok | Chilliwack in May |
| June | 20° / 4° | 9 | 21 | 0 | 135 mm | Ok | Chilliwack in June |
| July | 24° / 6° | 4 | 27 | 0 | 58 mm | Perfect | Chilliwack in July |
| August | 25° / 7° | 4 | 27 | 0 | 62 mm | Perfect | Chilliwack in August |
| September | 20° / 4° | 9 | 21 | 0 | 168 mm | Ok | Chilliwack in September |
| October | 13° / 2° | 12 | 19 | 0 | 287 mm | Bad | Chilliwack in October |
| November | 7° / -1° | 16 | 13 | 1 | 434 mm | Bad | Chilliwack in November |
| December | 3° / -4° | 15 | 10 | 6 | 318 mm | Awful | Chilliwack in December |