Cottage Grove weather in August: Cottage Grove, Oregon: normal highs, lows, rain and records for August
Cottage Grove in August has a normal high of 83°F and a normal low of 50°F, a daily mean of 67°F, falling from 84°F on the 1st to 81°F by the 31st. Measurable precipitation falls on 3 days in a normal August, 0.53 inches in all. (NOAA 1991-2020 normals)
In metric: a normal high of 28°C and low of 10°C, 13 mm of precipitation in August.
- NOAA stationCottage Grove (2 mi E)
- Station IDUSC00351897
- Location43.79°N 123.03°W
- Elevation595 ft (181 m)
- Population10,690
- Jan 48° 33°
- Feb 52° 34°
- Mar 56° 35°
- Apr 61° 38°
- May 68° 44°
- Jun 73° 48°
- Jul 82° 51°
- Aug 83° 50°
- Sep 77° 46°
- Oct 64° 41°
- Nov 53° 37°
- Dec 47° 33°
Each month: normal high (large) and low, °F. Fill: the month's normal mean, colder blue to hotter red.
How warm is Cottage Grove in August?
The normal high is 83°F and the normal low 50°F, for a daily mean of 66.5°F. August is 0.1°F cooler than July and 5.2°F warmer than September. August is the 2nd warmest month of the year in Cottage Grove and the 11th wettest. Across the month the normal high falls 3°F, from 84°F on August 1 to 81°F on August 31. From one year to the next August's mean temperature typically moves about 1.5°F either way (NOAA's standard deviation), so roughly two Augusts in three average between 65°F and 68°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 14%).
| Day | High | Low | Chance of 0.01 in | Chance of 0.10 in |
|---|---|---|---|---|
| August 1 | 84°F | 52°F | 7% | 3% |
| August 8 | 84°F | 51°F | 8% | 3% |
| August 15 | 83°F | 51°F | 9% | 4% |
| August 22 | 82°F | 50°F | 11% | 6% |
| August 31 | 81°F | 49°F | 14% | 8% |
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 | 84°F | 52°F | 7% | 3% | 14 h 40 min |
| August 2 | 84°F | 52°F | 8% | 3% | 14 h 40 min |
| August 3 | 84°F | 52°F | 8% | 3% | 14 h 30 min |
| August 4 | 84°F | 52°F | 8% | 3% | 14 h 30 min |
| August 5 | 84°F | 51°F | 8% | 3% | 14 h 30 min |
| August 6 | 84°F | 51°F | 8% | 3% | 14 h 30 min |
| August 7 | 84°F | 51°F | 8% | 3% | 14 h 20 min |
| August 8 | 84°F | 51°F | 8% | 3% | 14 h 20 min |
| August 9 | 84°F | 51°F | 8% | 3% | 14 h 20 min |
| August 10 | 83°F | 51°F | 8% | 3% | 14 h 20 min |
| August 11 | 83°F | 51°F | 8% | 4% | 14 h 10 min |
| August 12 | 83°F | 51°F | 9% | 4% | 14 h 10 min |
| August 13 | 83°F | 51°F | 9% | 4% | 14 h 10 min |
| August 14 | 83°F | 51°F | 9% | 4% | 14 h 10 min |
| August 15 | 83°F | 51°F | 9% | 4% | 14 h |
| August 16 | 83°F | 51°F | 9% | 4% | 14 h |
| August 17 | 83°F | 50°F | 10% | 4% | 14 h |
| August 18 | 83°F | 50°F | 10% | 5% | 14 h |
| August 19 | 82°F | 50°F | 10% | 5% | 13 h 50 min |
| August 20 | 82°F | 50°F | 10% | 5% | 13 h 50 min |
| August 21 | 82°F | 50°F | 11% | 5% | 13 h 50 min |
| August 22 | 82°F | 50°F | 11% | 6% | 13 h 40 min |
| August 23 | 82°F | 50°F | 11% | 6% | 13 h 40 min |
| August 24 | 82°F | 50°F | 12% | 6% | 13 h 40 min |
| August 25 | 82°F | 50°F | 12% | 6% | 13 h 40 min |
| August 26 | 81°F | 49°F | 12% | 6% | 13 h 30 min |
| August 27 | 81°F | 49°F | 13% | 7% | 13 h 30 min |
| August 28 | 81°F | 49°F | 13% | 7% | 13 h 30 min |
| August 29 | 81°F | 49°F | 13% | 7% | 13 h 20 min |
| August 30 | 81°F | 49°F | 14% | 8% | 13 h 20 min |
| August 31 | 81°F | 49°F | 14% | 8% | 13 h 20 min |
- Normal high
- 83°FAugust average
- Normal low
- 50°FAugust average
- Precipitation
- 0.53 inmonth total
- Days with precipitation
- 30.01 inch or more
- Days at 90°F or more
- 6
- Daylight
- 14 h 40 min to 13 h 20 minAugust 1 to August 31
- Days at 70°F or more
- 30
- Days at 80°F or more
- 22
- Sunshine
- 88%of clear-sky sunlight (NASA)
Source: NOAA NCEI 1991-2020 daily normals, station USC00351897; monthly normals. Daylight is computed from the place's latitude with NOAA's solar equations.
Does it rain in Cottage Grove in August?
On a given August day the chance of 0.01 inch or more is 10% on average, highest around August 31 (14%). In all, 0.53 in falls on 3 days of a normal August.
In a normal August in Cottage Grove, 6 days reach 90°F.
Source: NOAA NCEI 1991-2020 daily and monthly normals, station USC00351897.
What are the records for August in Cottage Grove?
The warmest August temperature on this station's record (since 1916) is 105°F, on August 8, 1978; the coldest is 32°F, on August 20, 1988. The wettest August brought 4.86 in (1968).
The August mean against the 1991-2020 normal of 66.5°F: 2021 67.9°F (+1.4), 2022 68.8°F (+2.3), 2023 70.0°F (+3.5), 2024 66.2°F (−0.3), 2025 70.1°F (+3.6). 4 of 5 ran warmer than normal.
| August | Mean | Against normal | Precip. |
|---|---|---|---|
| 2021 | 67.9°F | +1.4°F | 0.08 in |
| 2022 | 68.8°F | +2.3°F | 0.02 in |
| 2023 | 70.0°F | +3.5°F | 0.06 in |
| 2024 | 66.2°F | −0.3°F | 0.54 in |
| 2025 | 70.1°F | +3.6°F | 0.21 in |
Source: records: ACIS, station USC00351897; recent months: ACIS, station USC00351897. Records and recent months use complete months only.
How does August in Cottage Grove 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; Cottage Grove's is 83°F.
Source: NOAA NCEI 1991-2020 monthly normals for every station in the state.
Other months and places
- Cottage Grove in July82°F by day, 51°F at night
- Cottage Grove in September77°F by day, 46°F at night
- Cottage Grove through the yearEvery month, frost dates, records and recent years
- Oregon in AugustThe statewide normal and the warmest and coolest places
- Cave Junction: Oregon's warmest Augustnormal high 94°F