Cottage Grove weather in September: Cottage Grove, Oregon: normal highs, lows, rain and records for September
Cottage Grove in September has a normal high of 77°F and a normal low of 46°F, a daily mean of 61°F, falling from 80°F on the 1st to 71°F by the 30th. Measurable precipitation falls on 6 days in a normal September, 1.54 inches in all. (NOAA 1991-2020 normals)
In metric: a normal high of 25°C and low of 8°C, 39 mm of precipitation in September.
- 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 September?
The normal high is 77°F and the normal low 46°F, for a daily mean of 61.3°F. September is 5.2°F cooler than August and 8.7°F warmer than October. September is the 3rd warmest month of the year in Cottage Grove and the 10th wettest. Across the month the normal high falls 9°F, from 80°F on September 1 to 71°F on September 30. From one year to the next September's mean temperature typically moves about 1.4°F either way (NOAA's standard deviation), so roughly two Septembers in three average between 60°F and 63°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 34%).
| Day | High | Low | Chance of 0.01 in | Chance of 0.10 in |
|---|---|---|---|---|
| September 1 | 80°F | 49°F | 14% | 8% |
| September 8 | 79°F | 47°F | 18% | 10% |
| September 15 | 77°F | 46°F | 22% | 13% |
| September 22 | 75°F | 45°F | 27% | 15% |
| September 30 | 71°F | 44°F | 34% | 19% |
Every day of September: normal high, low and chance of precipitation (warmest afternoon September 1, coldest night September 30)
| Day | High | Low | Chance of 0.01 in | Chance of 0.10 in | Daylight |
|---|---|---|---|---|---|
| September 1 | 80°F | 49°F | 14% | 8% | 13 h 20 min |
| September 2 | 80°F | 48°F | 15% | 8% | 13 h 10 min |
| September 3 | 80°F | 48°F | 15% | 9% | 13 h 10 min |
| September 4 | 80°F | 48°F | 16% | 9% | 13 h 10 min |
| September 5 | 80°F | 48°F | 16% | 9% | 13 h |
| September 6 | 79°F | 48°F | 17% | 9% | 13 h |
| September 7 | 79°F | 48°F | 17% | 10% | 13 h |
| September 8 | 79°F | 47°F | 18% | 10% | 13 h |
| September 9 | 79°F | 47°F | 18% | 11% | 12 h 50 min |
| September 10 | 79°F | 47°F | 19% | 11% | 12 h 50 min |
| September 11 | 78°F | 47°F | 19% | 11% | 12 h 50 min |
| September 12 | 78°F | 47°F | 20% | 12% | 12 h 40 min |
| September 13 | 78°F | 47°F | 20% | 12% | 12 h 40 min |
| September 14 | 77°F | 46°F | 21% | 12% | 12 h 40 min |
| September 15 | 77°F | 46°F | 22% | 13% | 12 h 30 min |
| September 16 | 77°F | 46°F | 23% | 13% | 12 h 30 min |
| September 17 | 76°F | 46°F | 23% | 13% | 12 h 30 min |
| September 18 | 76°F | 46°F | 24% | 14% | 12 h 30 min |
| September 19 | 76°F | 46°F | 25% | 14% | 12 h 20 min |
| September 20 | 75°F | 45°F | 26% | 14% | 12 h 20 min |
| September 21 | 75°F | 45°F | 26% | 15% | 12 h 20 min |
| September 22 | 75°F | 45°F | 27% | 15% | 12 h 10 min |
| September 23 | 74°F | 45°F | 28% | 16% | 12 h 10 min |
| September 24 | 74°F | 45°F | 29% | 16% | 12 h 10 min |
| September 25 | 73°F | 44°F | 30% | 16% | 12 h 10 min |
| September 26 | 73°F | 44°F | 31% | 17% | 12 h |
| September 27 | 73°F | 44°F | 32% | 17% | 12 h |
| September 28 | 72°F | 44°F | 33% | 18% | 12 h |
| September 29 | 72°F | 44°F | 33% | 18% | 11 h 50 min |
| September 30 | 71°F | 44°F | 34% | 19% | 11 h 50 min |
- Normal high
- 77°FSeptember average
- Normal low
- 46°FSeptember average
- Precipitation
- 1.54 inmonth total
- Days with precipitation
- 60.01 inch or more
- Days at 90°F or more
- 2
- Daylight
- 13 h 20 min to 11 h 50 minSeptember 1 to September 30
- Days at 70°F or more
- 24
- Days at 80°F or more
- 13
- Sunshine
- 83%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 September?
On a given September day the chance of 0.01 inch or more is 23% on average, highest around September 30 (34%). In all, 1.54 in falls on 6 days of a normal September.
In a normal September in Cottage Grove, 2 days reach 90°F.
Source: NOAA NCEI 1991-2020 daily and monthly normals, station USC00351897.
What are the records for September in Cottage Grove?
The warmest September temperature on this station's record (since 1916) is 105°F, on September 5, 1944; the coldest is 24°F, on September 25, 1926. The wettest September brought 7.00 in (2013).
The September mean against the 1991-2020 normal of 61.3°F: 2021 61.7°F (+0.4), 2022 62.8°F (+1.5), 2023 61.5°F (+0.2), 2024 63.0°F (+1.7). 4 of 4 ran warmer than normal.
| September | Mean | Against normal | Precip. |
|---|---|---|---|
| 2021 | 61.7°F | +0.4°F | 3.26 in |
| 2022 | 62.8°F | +1.5°F | 0.44 in |
| 2023 | 61.5°F | +0.2°F | 1.65 in |
| 2024 | 63.0°F | +1.7°F | 1.82 in |
Source: records: ACIS, station USC00351897; recent months: ACIS, station USC00351897. Records and recent months use complete months only.
How does September in Cottage Grove compare across Oregon?
Across the 105 places PlainClimate covers in Oregon, September normal highs run from 64°F in Newport to 87°F in Cave Junction; Cottage Grove's is 77°F.
Source: NOAA NCEI 1991-2020 monthly normals for every station in the state.
Other months and places
- Cottage Grove in August83°F by day, 50°F at night
- Cottage Grove in October64°F by day, 41°F at night
- Cottage Grove through the yearEvery month, frost dates, records and recent years
- Oregon in SeptemberThe statewide normal and the warmest and coolest places
- Cave Junction: Oregon's warmest Septembernormal high 87°F