Bellingham weather in August: Bellingham, Washington: normal highs, lows, rain and records for August
Bellingham in August has a normal high of 73°F and a normal low of 55°F, a daily mean of 64°F, falling from 74°F on the 1st to 71°F by the 31st. Measurable precipitation falls on 6 days in a normal August, 1.13 inches in all. (NOAA 1991-2020 normals)
In metric: a normal high of 23°C and low of 13°C, 29 mm of precipitation in August.
- NOAA stationBellingham International Airport
- Station IDUSW00024217
- Location48.79°N 122.54°W
- Elevation149 ft (45 m)
- From the center4 miles
- Population95,860
- Jan 46° 34°
- Feb 49° 35°
- Mar 53° 38°
- Apr 58° 42°
- May 64° 47°
- Jun 68° 52°
- Jul 73° 55°
- Aug 73° 55°
- Sep 68° 50°
- Oct 59° 43°
- Nov 51° 38°
- Dec 46° 34°
Each month: normal high (large) and low, °F. Fill: the month's normal mean, colder blue to hotter red.
How warm is Bellingham in August?
The normal high is 73°F and the normal low 55°F, for a daily mean of 63.9°F. August is 0.0°F warmer than July and 5.0°F warmer than September. August is the warmest month of the year in Bellingham and the 11th wettest. Across the month the normal high falls 3°F, from 74°F on August 1 to 71°F on August 31. From one year to the next August's mean temperature typically moves about 1.3°F either way (NOAA's standard deviation), so roughly two Augusts in three average between 63°F and 65°F.
Bars above: each day's normal high to low. Columns below: the chance of 0.01 inch or more of precipitation that day, on a scale of 0 to 100% (highest 27%).
| Day | High | Low | Chance of 0.01 in | Chance of 0.10 in |
|---|---|---|---|---|
| August 1 | 74°F | 56°F | 16% | 7% |
| August 8 | 74°F | 56°F | 17% | 8% |
| August 15 | 73°F | 55°F | 19% | 9% |
| August 22 | 73°F | 54°F | 22% | 10% |
| August 31 | 71°F | 53°F | 27% | 13% |
Every day of August: normal high, low and chance of precipitation (warmest afternoon August 1, coldest night August 31)
| Day | High | Low | Chance of 0.01 in | Chance of 0.10 in | Daylight |
|---|---|---|---|---|---|
| August 1 | 74°F | 56°F | 16% | 7% | 15 h 10 min |
| August 2 | 74°F | 56°F | 16% | 7% | 15 h 10 min |
| August 3 | 74°F | 56°F | 16% | 7% | 15 h |
| August 4 | 74°F | 56°F | 17% | 7% | 15 h |
| August 5 | 74°F | 56°F | 17% | 7% | 15 h |
| August 6 | 74°F | 56°F | 17% | 7% | 14 h 50 min |
| August 7 | 74°F | 56°F | 17% | 7% | 14 h 50 min |
| August 8 | 74°F | 56°F | 17% | 8% | 14 h 50 min |
| August 9 | 74°F | 56°F | 18% | 8% | 14 h 50 min |
| August 10 | 74°F | 56°F | 18% | 8% | 14 h 40 min |
| August 11 | 74°F | 55°F | 18% | 8% | 14 h 40 min |
| August 12 | 74°F | 55°F | 18% | 8% | 14 h 40 min |
| August 13 | 74°F | 55°F | 19% | 8% | 14 h 30 min |
| August 14 | 74°F | 55°F | 19% | 9% | 14 h 30 min |
| August 15 | 73°F | 55°F | 19% | 9% | 14 h 30 min |
| August 16 | 73°F | 55°F | 20% | 9% | 14 h 20 min |
| August 17 | 73°F | 55°F | 20% | 9% | 14 h 20 min |
| August 18 | 73°F | 55°F | 20% | 9% | 14 h 20 min |
| August 19 | 73°F | 55°F | 21% | 10% | 14 h 10 min |
| August 20 | 73°F | 54°F | 21% | 10% | 14 h 10 min |
| August 21 | 73°F | 54°F | 22% | 10% | 14 h 10 min |
| August 22 | 73°F | 54°F | 22% | 10% | 14 h |
| August 23 | 73°F | 54°F | 23% | 11% | 14 h |
| August 24 | 72°F | 54°F | 23% | 11% | 14 h |
| August 25 | 72°F | 54°F | 24% | 11% | 13 h 50 min |
| August 26 | 72°F | 54°F | 25% | 12% | 13 h 50 min |
| August 27 | 72°F | 53°F | 25% | 12% | 13 h 50 min |
| August 28 | 72°F | 53°F | 26% | 12% | 13 h 40 min |
| August 29 | 72°F | 53°F | 26% | 13% | 13 h 40 min |
| August 30 | 72°F | 53°F | 27% | 13% | 13 h 40 min |
| August 31 | 71°F | 53°F | 27% | 13% | 13 h 30 min |
- Normal high
- 73°FAugust average
- Normal low
- 55°FAugust average
- Precipitation
- 1.13 inmonth total
- Days with precipitation
- 60.01 inch or more
- Daylight
- 15 h 10 min to 13 h 30 minAugust 1 to August 31
- Days at 70°F or more
- 21
- Days at 80°F or more
- 4
- Sunshine
- 81%of clear-sky sunlight (NASA)
Source: NOAA NCEI 1991-2020 daily normals, station USW00024217; monthly normals. Daylight is computed from the place's latitude with NOAA's solar equations.
Does it rain in Bellingham in August?
On a given August day the chance of 0.01 inch or more is 20% on average, highest around August 31 (27%). In all, 1.13 in falls on 6 days of a normal August.
Source: NOAA NCEI 1991-2020 daily and monthly normals, station USW00024217.
How humid and windy is Bellingham in August?
At 3 p.m. the normal temperature is 69°F with 58% relative humidity and a dew point of 53°F; at 6 a.m. it is 55°F with 90% humidity. The wind averages 5.9 mph, most often from the south-southwest in the afternoon.
| Time | Temperature | Dew point | Humidity | Wind | Clear or few clouds |
|---|---|---|---|---|---|
| 6 a.m. | 55°F | 52°F | 90% | 4.7 mph | 47% |
| 9 a.m. | 61°F | 54°F | 77% | 7.5 mph | 47% |
| noon | 67°F | 54°F | 64% | 8.4 mph | 55% |
| 3 p.m. | 69°F | 53°F | 58% | 8.2 mph | 68% |
| 6 p.m. | 66°F | 54°F | 64% | 5.7 mph | 71% |
| 9 p.m. | 59°F | 53°F | 81% | 4.2 mph | 67% |
Source: NOAA NCEI 1991-2020 hourly normals, station USW00024217. Hourly normals exist only for NOAA's first-order stations; a dash where NOAA publishes no value for that hour (the sky at some hours).
What are the records for August in Bellingham?
The warmest August temperature on this station's record (since 1949) is 100°F, on August 12, 2021; the coldest is 38°F, on August 29, 1969. The wettest August brought 4.77 in (1962).
The August mean against the 1991-2020 normal of 63.9°F: 2021 64.8°F (+0.9), 2022 67.0°F (+3.1), 2023 65.4°F (+1.5), 2024 63.0°F (−0.9), 2025 65.2°F (+1.3), 2026 63.9°F (at normal). 4 of 6 ran warmer than normal.
| August | Mean | Against normal | Precip. |
|---|---|---|---|
| 2021 | 64.8°F | +0.9°F | 0.96 in |
| 2022 | 67.0°F | +3.1°F | 0.28 in |
| 2023 | 65.4°F | +1.5°F | 0.51 in |
| 2024 | 63.0°F | −0.9°F | 2.61 in |
| 2025 | 65.2°F | +1.3°F | 1.67 in |
| 2026 | 63.9°F | at normal | 0.36 in |
Source: records: ACIS, station USW00024217; recent months: ACIS, station USW00024217. Records and recent months use complete months only.
How does August in Bellingham compare across Washington?
Across the 96 places PlainClimate covers in Washington, August normal highs run from 67°F in Long Beach to 91°F in Pasco; Bellingham's is 73°F.
Source: NOAA NCEI 1991-2020 monthly normals for every station in the state.