Coquitlam climate by month
What the weather is like
Coquitlam has an oceanic climate (Köppen Cfb): rain spread through the year and no real dry season.
The warmest month is August, when afternoons average 25° and nights 12°. December is the coolest month, with highs of 6° and lows of -1°. The difference between the warmest and the coolest month is about 16°.
About 2,716 mm of precipitation falls in an average year. December is the wettest month (361 mm, 22 wet days) and August the driest (80 mm, 10 wet days). Cloud cover ranges from 29% in August to 60% in November.
The sea reaches about 16° in August. Sea temperatures lag the air by a month or two, so late summer is usually warmer for swimming than early summer.
Compared with Ottawa, the capital, Coquitlam is 0.9° cooler on a August afternoon and receives more precipitation over the year.
Year in figures
- Hottest afternoons
- 25° · August
- Coldest nights
- -1° · December
- Wettest month
- December
- Driest month
- August
- Clearest skies
- August · 29% cloud
- Warmest sea
- 16° · August
- Longest day
- 16 h 13 min
- Shortest day
- 8 h 13 min
Twelve months at a glance
Temperature and precipitation
Daily high/low range bars, monthly precipitation columns, sea temperature lineTemperature curve
Average high, low and seaDaylight
Hours between sunrise and sunset on the 15th of each monthClimate normals month by month
| Month | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Average high | 6° | 8° | 11° | 15° | 20° | 22° | 25° | 25° | 21° | 15° | 9° | 6° |
| Average low | -1° | 0° | 1° | 4° | 7° | 10° | 12° | 12° | 9° | 6° | 2° | -1° |
| Precipitation | 364 mm | 260 mm | 257 mm | 210 mm | 151 mm | 121 mm | 77 mm | 80 mm | 126 mm | 289 mm | 420 mm | 361 mm |
| Wet days (≥1 mm) | 21.1 | 17.6 | 21.4 | 18.7 | 16.4 | 16.4 | 10.7 | 9.8 | 13.2 | 19 | 21.4 | 21.5 |
| Cloud cover | 58% | 52% | 51% | 48% | 44% | 42% | 31% | 29% | 34% | 49% | 60% | 58% |
| Sea temperature | 7° | 7° | 8° | 10° | 12° | 14° | 16° | 16° | 14° | 11° | 9° | 8° |
| Daylight | 8h 39 | 10h 10 | 11h 51 | 13h 44 | 15h 20 | 16h 13 | 15h 50 | 14h 26 | 12h 38 | 10h 50 | 9h 08 | 8h 13 |
| Month score | 13 | 16 | 23 | 45 | 61 | 62 | 74 | 77 | 67 | 43 | 13 | 13 |