Coos Bay weather in August: Coos Bay, Oregon: normal highs, lows, rain and records for August
Coos Bay in August has a normal high of 66°F and a normal low of 50°F, a daily mean of 58°F, rising from 65°F on the 1st to 67°F by the 31st. Measurable precipitation falls on 8 days in a normal August, 0.46 inches in all. (NOAA 1991-2020 normals)
In metric: a normal high of 19°C and low of 10°C, 12 mm of precipitation in August.
- NOAA stationCoos Bay (8 mi SW)
- Station IDUSW00004141
- Location43.27°N 124.32°W
- Elevation12 ft (4 m)
- Population15,801
- Jan 52° 36°
- Feb 54° 37°
- Mar 56° 38°
- Apr 57° 39°
- May 60° 44°
- Jun 62° 47°
- Jul 64° 51°
- Aug 66° 50°
- Sep 66° 47°
- Oct 63° 42°
- Nov 56° 39°
- Dec 51° 36°
Each month: normal high (large) and low, °F. Fill: the month's normal mean, colder blue to hotter red.
How warm is Coos Bay in August?
The normal high is 66°F and the normal low 50°F, for a daily mean of 58.0°F. August is 0.8°F warmer than July and 1.7°F warmer than September. August is the warmest month of the year in Coos Bay and the 12th wettest. Across the month the normal high rises 2°F, from 65°F on August 1 to 67°F on August 31. From one year to the next August's mean temperature typically moves about 1.4°F either way (NOAA's standard deviation), so roughly two Augusts in three average between 57°F and 59°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 26%).
| Day | High | Low | Chance of 0.01 in | Chance of 0.10 in |
|---|---|---|---|---|
| August 1 | 65°F | 52°F | 24% | 1% |
| August 8 | 65°F | 51°F | 25% | 2% |
| August 15 | 66°F | 51°F | 25% | 3% |
| August 22 | 66°F | 50°F | 25% | 5% |
| August 31 | 67°F | 49°F | 26% | 8% |
Every day of August: normal high, low and chance of precipitation (warmest afternoon August 30, coldest night August 31)
| Day | High | Low | Chance of 0.01 in | Chance of 0.10 in | Daylight |
|---|---|---|---|---|---|
| August 1 | 65°F | 52°F | 24% | 1% | 14 h 30 min |
| August 2 | 65°F | 52°F | 24% | 1% | 14 h 30 min |
| August 3 | 65°F | 52°F | 24% | 2% | 14 h 30 min |
| August 4 | 65°F | 51°F | 25% | 2% | 14 h 30 min |
| August 5 | 65°F | 51°F | 25% | 2% | 14 h 30 min |
| August 6 | 65°F | 51°F | 25% | 2% | 14 h 20 min |
| August 7 | 65°F | 51°F | 25% | 2% | 14 h 20 min |
| August 8 | 65°F | 51°F | 25% | 2% | 14 h 20 min |
| August 9 | 65°F | 51°F | 25% | 2% | 14 h 20 min |
| August 10 | 65°F | 51°F | 25% | 2% | 14 h 10 min |
| August 11 | 65°F | 51°F | 25% | 2% | 14 h 10 min |
| August 12 | 66°F | 51°F | 25% | 2% | 14 h 10 min |
| August 13 | 66°F | 51°F | 25% | 3% | 14 h 10 min |
| August 14 | 66°F | 51°F | 25% | 3% | 14 h |
| August 15 | 66°F | 51°F | 25% | 3% | 14 h |
| August 16 | 66°F | 51°F | 25% | 3% | 14 h |
| August 17 | 66°F | 50°F | 25% | 3% | 14 h |
| August 18 | 66°F | 50°F | 25% | 3% | 13 h 50 min |
| August 19 | 66°F | 50°F | 25% | 4% | 13 h 50 min |
| August 20 | 66°F | 50°F | 25% | 4% | 13 h 50 min |
| August 21 | 66°F | 50°F | 25% | 4% | 13 h 50 min |
| August 22 | 66°F | 50°F | 25% | 5% | 13 h 40 min |
| August 23 | 66°F | 50°F | 25% | 5% | 13 h 40 min |
| August 24 | 66°F | 50°F | 25% | 5% | 13 h 40 min |
| August 25 | 66°F | 50°F | 26% | 5% | 13 h 30 min |
| August 26 | 66°F | 49°F | 26% | 6% | 13 h 30 min |
| August 27 | 66°F | 49°F | 26% | 6% | 13 h 30 min |
| August 28 | 66°F | 49°F | 26% | 7% | 13 h 30 min |
| August 29 | 66°F | 49°F | 26% | 7% | 13 h 20 min |
| August 30 | 67°F | 49°F | 26% | 7% | 13 h 20 min |
| August 31 | 67°F | 49°F | 26% | 8% | 13 h 20 min |
- Normal high
- 66°FAugust average
- Normal low
- 50°FAugust average
- Precipitation
- 0.46 inmonth total
- Days with precipitation
- 80.01 inch or more
- Daylight
- 14 h 30 min to 13 h 20 minAugust 1 to August 31
- Days at 70°F or more
- 6
- Days at 80°F or more
- 1
- Sunshine
- 79%of clear-sky sunlight (NASA)
Source: NOAA NCEI 1991-2020 daily normals, station USW00004141; monthly normals. Daylight is computed from the place's latitude with NOAA's solar equations.
Does it rain in Coos Bay in August?
On a given August day the chance of 0.01 inch or more is 25% on average, highest around August 28 (26%). In all, 0.46 in falls on 8 days of a normal August.
Source: NOAA NCEI 1991-2020 daily and monthly normals, station USW00004141.
What are the records for August in Coos Bay?
The August mean against the 1991-2020 normal of 58.0°F: 2022 60.8°F (+2.8), 2023 60.4°F (+2.4), 2024 59.4°F (+1.4), 2025 58.6°F (+0.6), 2026 59.2°F (+1.2). 5 of 5 ran warmer than normal.
| August | Mean | Against normal | Precip. |
|---|---|---|---|
| 2022 | 60.8°F | +2.8°F | 0.16 in |
| 2023 | 60.4°F | +2.4°F | 0.41 in |
| 2024 | 59.4°F | +1.4°F | 1.07 in |
| 2025 | 58.6°F | +0.6°F | 0.82 in |
| 2026 | 59.2°F | +1.2°F | 0.00 in |
Source: recent months: ACIS, station USW00004141. Records and recent months use complete months only.
How does August in Coos Bay compare across Oregon?
Across the 105 places PlainClimate covers in Oregon, August normal highs run from 64°F in Newport to 94°F in Cave Junction; Coos Bay's is 66°F.
Source: NOAA NCEI 1991-2020 monthly normals for every station in the state.