Sequim weather in August: Sequim, Washington: normal highs, lows, rain and records for August
Sequim in August has a normal high of 70°F and a normal low of 51°F, a daily mean of 61°F, falling from 71°F on the 1st to 69°F by the 31st. Measurable precipitation falls on 5 days in a normal August, 0.56 inches in all. (NOAA 1991-2020 normals)
In metric: a normal high of 21°C and low of 11°C, 14 mm of precipitation in August.
- NOAA stationSequim (2 mi E)
- Station IDUSC00457544
- Location48.09°N 123.06°W
- Elevation50 ft (15 m)
- Population8,199
- Jan 46° 32°
- Feb 48° 32°
- Mar 51° 35°
- Apr 56° 38°
- May 62° 44°
- Jun 65° 49°
- Jul 70° 52°
- Aug 70° 51°
- Sep 66° 46°
- Oct 58° 40°
- Nov 50° 35°
- Dec 46° 32°
Each month: normal high (large) and low, °F. Fill: the month's normal mean, colder blue to hotter red.
How warm is Sequim in August?
The normal high is 70°F and the normal low 51°F, for a daily mean of 60.7°F. August is 0.1°F cooler than July and 4.7°F warmer than September. August is the 2nd warmest month of the year in Sequim and the 11th wettest. Across the month the normal high falls 2°F, from 71°F on August 1 to 69°F on August 31. From one year to the next August's mean temperature typically moves about 1.6°F either way (NOAA's standard deviation), so roughly two Augusts in three average between 59°F and 62°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 22%).
| Day | High | Low | Chance of 0.01 in | Chance of 0.10 in |
|---|---|---|---|---|
| August 1 | 71°F | 52°F | 15% | 5% |
| August 8 | 71°F | 52°F | 16% | 5% |
| August 15 | 71°F | 51°F | 16% | 5% |
| August 22 | 70°F | 51°F | 18% | 6% |
| August 31 | 69°F | 49°F | 22% | 7% |
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 | 71°F | 52°F | 15% | 5% | 15 h |
| August 2 | 71°F | 52°F | 15% | 5% | 15 h |
| August 3 | 71°F | 52°F | 15% | 5% | 15 h |
| August 4 | 71°F | 52°F | 15% | 5% | 15 h |
| August 5 | 71°F | 52°F | 15% | 5% | 14 h 50 min |
| August 6 | 71°F | 52°F | 15% | 5% | 14 h 50 min |
| August 7 | 71°F | 52°F | 16% | 5% | 14 h 50 min |
| August 8 | 71°F | 52°F | 16% | 5% | 14 h 40 min |
| August 9 | 71°F | 52°F | 16% | 5% | 14 h 40 min |
| August 10 | 71°F | 52°F | 16% | 5% | 14 h 40 min |
| August 11 | 71°F | 52°F | 16% | 5% | 14 h 30 min |
| August 12 | 71°F | 52°F | 16% | 5% | 14 h 30 min |
| August 13 | 71°F | 52°F | 16% | 5% | 14 h 30 min |
| August 14 | 71°F | 52°F | 16% | 5% | 14 h 30 min |
| August 15 | 71°F | 51°F | 16% | 5% | 14 h 20 min |
| August 16 | 71°F | 51°F | 17% | 5% | 14 h 20 min |
| August 17 | 71°F | 51°F | 17% | 6% | 14 h 20 min |
| August 18 | 70°F | 51°F | 17% | 6% | 14 h 10 min |
| August 19 | 70°F | 51°F | 17% | 6% | 14 h 10 min |
| August 20 | 70°F | 51°F | 18% | 6% | 14 h 10 min |
| August 21 | 70°F | 51°F | 18% | 6% | 14 h |
| August 22 | 70°F | 51°F | 18% | 6% | 14 h |
| August 23 | 70°F | 50°F | 19% | 6% | 14 h |
| August 24 | 70°F | 50°F | 19% | 6% | 13 h 50 min |
| August 25 | 70°F | 50°F | 19% | 6% | 13 h 50 min |
| August 26 | 70°F | 50°F | 20% | 6% | 13 h 50 min |
| August 27 | 70°F | 50°F | 20% | 7% | 13 h 40 min |
| August 28 | 69°F | 50°F | 21% | 7% | 13 h 40 min |
| August 29 | 69°F | 50°F | 21% | 7% | 13 h 40 min |
| August 30 | 69°F | 49°F | 21% | 7% | 13 h 30 min |
| August 31 | 69°F | 49°F | 22% | 7% | 13 h 30 min |
- Normal high
- 70°FAugust average
- Normal low
- 51°FAugust average
- Precipitation
- 0.56 inmonth total
- Days with precipitation
- 50.01 inch or more
- Daylight
- 15 h to 13 h 30 minAugust 1 to August 31
- Days at 70°F or more
- 17
- Days at 80°F or more
- 2
- Sunshine
- 81%of clear-sky sunlight (NASA)
Source: NOAA NCEI 1991-2020 daily normals, station USC00457544; monthly normals. Daylight is computed from the place's latitude with NOAA's solar equations.
Does it rain in Sequim in August?
On a given August day the chance of 0.01 inch or more is 17% on average, highest around August 31 (22%). In all, 0.56 in falls on 5 days of a normal August.
Source: NOAA NCEI 1991-2020 daily and monthly normals, station USC00457544.
What are the records for August in Sequim?
The warmest August temperature on this station's record (since 1980) is 93°F, on August 12, 2025; the coldest is 33°F, on August 19, 2001. The wettest August brought 2.71 in (1995).
The August mean against the 1991-2020 normal of 60.7°F: 2021 61.9°F (+1.2), 2022 65.2°F (+4.5), 2024 62.6°F (+1.9), 2025 65.4°F (+4.7), 2026 63.2°F (+2.5). 5 of 5 ran warmer than normal.
| August | Mean | Against normal | Precip. |
|---|---|---|---|
| 2021 | 61.9°F | +1.2°F | 0.08 in |
| 2022 | 65.2°F | +4.5°F | 0.10 in |
| 2024 | 62.6°F | +1.9°F | 1.42 in |
| 2025 | 65.4°F | +4.7°F | 0.49 in |
| 2026 | 63.2°F | +2.5°F | 0.04 in |
Source: records: ACIS, station USC00457544; recent months: ACIS, station USC00457544. Records and recent months use complete months only.
How does August in Sequim 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; Sequim's is 70°F.
Source: NOAA NCEI 1991-2020 monthly normals for every station in the state.