Roseburg weather in August: Roseburg, Oregon: normal highs, lows, rain and records for August
Roseburg in August has a normal high of 86°F and a normal low of 57°F, a daily mean of 72°F, falling from 88°F on the 1st to 84°F by the 31st. Measurable precipitation falls on 2 days in a normal August, 0.23 inches in all. (NOAA 1991-2020 normals)
In metric: a normal high of 30°C and low of 14°C, 6 mm of precipitation in August.
- NOAA stationRoseburg Regional Airport
- Station IDUSW00024231
- Location43.24°N 123.35°W
- Elevation525 ft (160 m)
- Population23,795
- Jan 50° 37°
- Feb 54° 38°
- Mar 59° 40°
- Apr 63° 43°
- May 71° 48°
- Jun 77° 53°
- Jul 86° 57°
- Aug 86° 57°
- Sep 80° 52°
- Oct 67° 45°
- Nov 54° 41°
- Dec 48° 37°
Each month: normal high (large) and low, °F. Fill: the month's normal mean, colder blue to hotter red.
How warm is Roseburg in August?
The normal high is 86°F and the normal low 57°F, for a daily mean of 71.5°F. August is 0.1°F cooler than July and 5.4°F warmer than September. August is the 2nd warmest month of the year in Roseburg and the 12th wettest. Across the month the normal high falls 4°F, from 88°F on August 1 to 84°F on August 31. From one year to the next August's mean temperature typically moves about 1.8°F either way (NOAA's standard deviation), so roughly two Augusts in three average between 70°F and 73°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 10%).
| Day | High | Low | Chance of 0.01 in | Chance of 0.10 in |
|---|---|---|---|---|
| August 1 | 88°F | 58°F | 4% | 2% |
| August 8 | 87°F | 58°F | 4% | 2% |
| August 15 | 86°F | 57°F | 5% | 2% |
| August 22 | 85°F | 57°F | 7% | 3% |
| August 31 | 84°F | 55°F | 10% | 4% |
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 | 88°F | 58°F | 4% | 2% | 14 h 30 min |
| August 2 | 88°F | 58°F | 4% | 2% | 14 h 30 min |
| August 3 | 87°F | 58°F | 4% | 2% | 14 h 30 min |
| August 4 | 87°F | 58°F | 4% | 2% | 14 h 30 min |
| August 5 | 87°F | 58°F | 4% | 2% | 14 h 30 min |
| August 6 | 87°F | 58°F | 4% | 2% | 14 h 20 min |
| August 7 | 87°F | 58°F | 4% | 2% | 14 h 20 min |
| August 8 | 87°F | 58°F | 4% | 2% | 14 h 20 min |
| August 9 | 87°F | 58°F | 4% | 2% | 14 h 20 min |
| August 10 | 87°F | 58°F | 4% | 2% | 14 h 10 min |
| August 11 | 87°F | 58°F | 4% | 2% | 14 h 10 min |
| August 12 | 87°F | 58°F | 5% | 2% | 14 h 10 min |
| August 13 | 86°F | 58°F | 5% | 2% | 14 h 10 min |
| August 14 | 86°F | 58°F | 5% | 2% | 14 h |
| August 15 | 86°F | 57°F | 5% | 2% | 14 h |
| August 16 | 86°F | 57°F | 5% | 2% | 14 h |
| August 17 | 86°F | 57°F | 5% | 2% | 14 h |
| August 18 | 86°F | 57°F | 6% | 2% | 13 h 50 min |
| August 19 | 86°F | 57°F | 6% | 2% | 13 h 50 min |
| August 20 | 85°F | 57°F | 6% | 2% | 13 h 50 min |
| August 21 | 85°F | 57°F | 6% | 2% | 13 h 40 min |
| August 22 | 85°F | 57°F | 7% | 3% | 13 h 40 min |
| August 23 | 85°F | 56°F | 7% | 3% | 13 h 40 min |
| August 24 | 85°F | 56°F | 7% | 3% | 13 h 40 min |
| August 25 | 85°F | 56°F | 8% | 3% | 13 h 30 min |
| August 26 | 85°F | 56°F | 8% | 3% | 13 h 30 min |
| August 27 | 85°F | 56°F | 8% | 3% | 13 h 30 min |
| August 28 | 84°F | 56°F | 9% | 4% | 13 h 30 min |
| August 29 | 84°F | 56°F | 9% | 4% | 13 h 20 min |
| August 30 | 84°F | 55°F | 9% | 4% | 13 h 20 min |
| August 31 | 84°F | 55°F | 10% | 4% | 13 h 20 min |
- Normal high
- 86°FAugust average
- Normal low
- 57°FAugust average
- Precipitation
- 0.23 inmonth total
- Days with precipitation
- 20.01 inch or more
- Days at 90°F or more
- 11
- Daylight
- 14 h 30 min to 13 h 20 minAugust 1 to August 31
- Days at 70°F or more
- 31
- Days at 80°F or more
- 25
- Sunshine
- 88%of clear-sky sunlight (NASA)
Source: NOAA NCEI 1991-2020 daily normals, station USW00024231; monthly normals. Daylight is computed from the place's latitude with NOAA's solar equations.
Does it rain in Roseburg in August?
On a given August day the chance of 0.01 inch or more is 6% on average, highest around August 31 (10%). In all, 0.23 in falls on 2 days of a normal August.
In a normal August in Roseburg, 11 days reach 90°F.
Source: NOAA NCEI 1991-2020 daily and monthly normals, station USW00024231.
What are the records for August in Roseburg?
The warmest August temperature on this station's record (since 1900) is 109°F, on August 15, 2020; the coldest is 41°F, on August 22, 1955. The wettest August brought 1.40 in (1899).
The August mean against the 1991-2020 normal of 71.5°F: 2021 73.3°F (+1.8), 2022 75.0°F (+3.5), 2023 75.5°F (+4.0), 2024 71.7°F (+0.2), 2025 75.7°F (+4.2), 2026 72.8°F (+1.3). 6 of 6 ran warmer than normal.
| August | Mean | Against normal | Precip. |
|---|---|---|---|
| 2021 | 73.3°F | +1.8°F | 0.04 in |
| 2022 | 75.0°F | +3.5°F | 0.00 in |
| 2023 | 75.5°F | +4.0°F | 0.21 in |
| 2024 | 71.7°F | +0.2°F | 0.85 in |
| 2025 | 75.7°F | +4.2°F | 0.13 in |
| 2026 | 72.8°F | +1.3°F | 0.00 in |
Source: records: ACIS, station USW00024231; recent months: ACIS, station USW00024231. Records and recent months use complete months only.
How does August in Roseburg 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; Roseburg's is 86°F.
Source: NOAA NCEI 1991-2020 monthly normals for every station in the state.