Roseburg weather in September: Roseburg, Oregon: normal highs, lows, rain and records for September
Roseburg in September has a normal high of 80°F and a normal low of 52°F, a daily mean of 66°F, falling from 84°F on the 1st to 75°F by the 30th. Measurable precipitation falls on 5 days in a normal September, 0.85 inches in all. (NOAA 1991-2020 normals)
In metric: a normal high of 27°C and low of 11°C, 22 mm of precipitation in September.
- 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 September?
The normal high is 80°F and the normal low 52°F, for a daily mean of 66.1°F. September is 5.4°F cooler than August and 10.0°F warmer than October. September is the 3rd warmest month of the year in Roseburg and the 10th wettest. Across the month the normal high falls 9°F, from 84°F on September 1 to 75°F on September 30. From one year to the next September's mean temperature typically moves about 1.6°F either way (NOAA's standard deviation), so roughly two Septembers 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 26%).
| Day | High | Low | Chance of 0.01 in | Chance of 0.10 in |
|---|---|---|---|---|
| September 1 | 84°F | 55°F | 10% | 4% |
| September 8 | 83°F | 54°F | 13% | 6% |
| September 15 | 81°F | 53°F | 17% | 8% |
| September 22 | 78°F | 51°F | 21% | 10% |
| September 30 | 75°F | 49°F | 26% | 13% |
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 | 84°F | 55°F | 10% | 4% | 13 h 10 min |
| September 2 | 84°F | 55°F | 10% | 4% | 13 h 10 min |
| September 3 | 84°F | 55°F | 11% | 5% | 13 h 10 min |
| September 4 | 83°F | 55°F | 11% | 5% | 13 h 10 min |
| September 5 | 83°F | 54°F | 11% | 5% | 13 h |
| September 6 | 83°F | 54°F | 12% | 5% | 13 h |
| September 7 | 83°F | 54°F | 12% | 6% | 13 h |
| September 8 | 83°F | 54°F | 13% | 6% | 12 h 50 min |
| September 9 | 82°F | 54°F | 13% | 6% | 12 h 50 min |
| September 10 | 82°F | 54°F | 14% | 7% | 12 h 50 min |
| September 11 | 82°F | 53°F | 14% | 7% | 12 h 50 min |
| September 12 | 82°F | 53°F | 15% | 7% | 12 h 40 min |
| September 13 | 81°F | 53°F | 15% | 8% | 12 h 40 min |
| September 14 | 81°F | 53°F | 16% | 8% | 12 h 40 min |
| September 15 | 81°F | 53°F | 17% | 8% | 12 h 30 min |
| September 16 | 80°F | 52°F | 17% | 9% | 12 h 30 min |
| September 17 | 80°F | 52°F | 18% | 9% | 12 h 30 min |
| September 18 | 80°F | 52°F | 19% | 9% | 12 h 30 min |
| September 19 | 79°F | 52°F | 19% | 9% | 12 h 20 min |
| September 20 | 79°F | 51°F | 20% | 10% | 12 h 20 min |
| September 21 | 79°F | 51°F | 20% | 10% | 12 h 20 min |
| September 22 | 78°F | 51°F | 21% | 10% | 12 h 10 min |
| September 23 | 78°F | 51°F | 22% | 11% | 12 h 10 min |
| September 24 | 78°F | 50°F | 22% | 11% | 12 h 10 min |
| September 25 | 77°F | 50°F | 23% | 11% | 12 h 10 min |
| September 26 | 77°F | 50°F | 23% | 12% | 12 h |
| September 27 | 76°F | 50°F | 24% | 12% | 12 h |
| September 28 | 76°F | 49°F | 25% | 12% | 12 h |
| September 29 | 75°F | 49°F | 26% | 13% | 11 h 50 min |
| September 30 | 75°F | 49°F | 26% | 13% | 11 h 50 min |
- Normal high
- 80°FSeptember average
- Normal low
- 52°FSeptember average
- Precipitation
- 0.85 inmonth total
- Days with precipitation
- 50.01 inch or more
- Days at 90°F or more
- 5
- Daylight
- 13 h 10 min to 11 h 50 minSeptember 1 to September 30
- Days at 70°F or more
- 26
- Days at 80°F or more
- 16
- Sunshine
- 83%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 September?
On a given September day the chance of 0.01 inch or more is 17% on average, highest around September 30 (26%). In all, 0.85 in falls on 5 days of a normal September.
In a normal September in Roseburg, 5 days reach 90°F.
Source: NOAA NCEI 1991-2020 daily and monthly normals, station USW00024231.
What are the records for September in Roseburg?
The warmest September temperature on this station's record (since 1900) is 105°F, on September 5, 2024; the coldest is 32°F, on September 30, 1954. The wettest September brought 3.84 in (2013).
The September mean against the 1991-2020 normal of 66.1°F: 2021 67.0°F (+0.9), 2022 69.1°F (+3.0), 2023 66.1°F (at normal), 2024 68.6°F (+2.5), 2025 68.7°F (+2.6), 2026 63.1°F (−3.0). 4 of 6 ran warmer than normal.
| September | Mean | Against normal | Precip. |
|---|---|---|---|
| 2021 | 67.0°F | +0.9°F | 2.26 in |
| 2022 | 69.1°F | +3.0°F | 0.88 in |
| 2023 | 66.1°F | at normal | 2.23 in |
| 2024 | 68.6°F | +2.5°F | 0.64 in |
| 2025 | 68.7°F | +2.6°F | 0.93 in |
| 2026 | 63.1°F | −3.0°F | 1.41 in |
Source: records: ACIS, station USW00024231; recent months: ACIS, station USW00024231. Records and recent months use complete months only.
How does September in Roseburg 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; Roseburg's is 80°F.
Source: NOAA NCEI 1991-2020 monthly normals for every station in the state.