Climate averages 1991–2020
Bellingham weather
in August.
A mild, moderately wet month: the warmest and the 2nd driest of the year. Meets the pleasant-weather rule
Long-term climate patterns, not a forecast for a particular trip.
August is a mild month in Bellingham: daytime highs average 21.7°C and nights cool to about 14.2°C. By daytime temperature it is the warmest month of the year.
Expect about 46 mm of rain on roughly 5 days, which makes August a moderately wet month (the 2nd driest of the 12 months). Daylight, from sunrise to sunset, lasts about 14 h 22 min on an average August day.
The nearest other city in this atlas is Abbotsford (37 km away). In August its highs average 22.8°C, 1.1°C warmer than Bellingham, with 61 mm of rain.
Among the 498 cities listed in the United States, Bellingham ranks 496th of 498 for the warmest August highs and joint 184th of 498 for the driest August (rainfall, lowest first). The mean August high of those 498 cities is 29.9°C; Bellingham is 8.2°C cooler than that mean.
From August to September, average highs fall by 2.6°C to 19.0°C, and monthly rainfall rises from 46 mm to 81 mm.
The annual picture
August in context
Monthly rainfall
Average total · mmAverages from hourly ERA5 reanalysis data. Actual weather varies from year to year. How these numbers are calculated
Every month, side by side
Bellingham climate table
| Month | Average highHigh / low | Average low | Rainfall mm/month | Rain days ≥1 mm/day | Daylight hours/dayDaylight h/day |
|---|---|---|---|---|---|
| January | 6.4°C1.2°C | 1.2°C | 213 | 18.6 | 8.89 h |
| February | 7.8°C1.2°C | 1.2°C | 139 | 15.5 | 10.110 h |
| March | 9.8°C2.6°C | 2.6°C | 171 | 18.9 | 11.912 h |
| April | 12.5°C4.7°C | 4.7°C | 122 | 15.2 | 13.714 h |
| May | 15.9°C8.1°C | 8.1°C | 86 | 11.3 | 15.215 h |
| June | 17.9°C11.1°C | 11.1°C | 64 | 9.4 | 16.116 h |
| July | 21.2°C13.8°C | 13.8°C | 32 | 5.1 | 15.716 h |
| August, selected | 21.7°C14.2°C | 14.2°C | 46 | 5.3 | 14.414 h |
| September | 19.0°C11.8°C | 11.8°C | 81 | 9.1 | 12.613 h |
| October | 13.6°C7.7°C | 7.7°C | 162 | 14.7 | 10.911 h |
| November | 8.7°C3.8°C | 3.8°C | 240 | 18.8 | 9.29 h |
| December | 5.8°C1.3°C | 1.3°C | 206 | 18.3 | 8.48 h |
Rainfall is the average of the 30 separate monthly totals. A rain day is a local calendar day with at least 1 mm of precipitation. Daylight is the calculated sunrise-to-sunset length, not measured sunshine.
Compare places
August in nearby cities
- Abbotsford in AugustCanada · 37 kmHigh 22.8°C · Low 12.8°C · 61 mm rain
- Langley in AugustCanada · 40 kmHigh 23.5°C · Low 13.6°C · 49 mm rain
- Surrey in AugustCanada · 46 kmHigh 23.0°C · Low 13.3°C · 49 mm rain
- Maple Ridge in AugustCanada · 52 kmHigh 23.3°C · Low 13.8°C · 107 mm rain
- Delta in AugustCanada · 55 kmHigh 23.0°C · Low 14.4°C · 41 mm rain
- New Westminster in AugustCanada · 59 kmHigh 22.6°C · Low 13.4°C · 73 mm rain
- Chilliwack in AugustCanada · 60 kmHigh 23.8°C · Low 14.3°C · 74 mm rain
- Coquitlam in AugustCanada · 62 kmHigh 23.3°C · Low 14.4°C · 84 mm rain
Read the numbers correctly
Climate, not a promise.
These patterns help compare months. They cannot tell you the weather on a specific day of your trip.
Sources, method and limitsHow these numbers are made (what the highs, lows and rain days mean, the sources and the model cell used for Bellingham) is explained once on the Bellingham year overview and on the Sources, method and limits page.