Grants Pass weather in September: Grants Pass, Oregon: normal highs, lows, rain and records for September
Grants Pass in September has a normal high of 84°F and a normal low of 48°F, a daily mean of 66°F, falling from 88°F on the 1st to 79°F by the 30th. Measurable precipitation falls on 3 days in a normal September, 0.56 inches in all. (NOAA 1991-2020 normals)
In metric: a normal high of 29°C and low of 9°C, 14 mm of precipitation in September.
- NOAA stationGrants Pass
- Station IDUSC00353445
- Location42.42°N 123.32°W
- Elevation932 ft (284 m)
- Population39,468
- Jan 48° 35°
- Feb 54° 36°
- Mar 60° 37°
- Apr 65° 40°
- May 74° 46°
- Jun 81° 51°
- Jul 91° 56°
- Aug 91° 55°
- Sep 84° 48°
- Oct 70° 41°
- Nov 54° 39°
- Dec 46° 35°
Each month: normal high (large) and low, °F. Fill: the month's normal mean, colder blue to hotter red.
How warm is Grants Pass in September?
The normal high is 84°F and the normal low 48°F, for a daily mean of 66.1°F. September is 6.6°F cooler than August and 10.6°F warmer than October. September is the 3rd warmest month of the year in Grants Pass and the 10th wettest. Across the month the normal high falls 9°F, from 88°F on September 1 to 79°F on September 30. From one year to the next September's mean temperature typically moves about 1.7°F either way (NOAA's standard deviation), so roughly two Septembers in three average between 64°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 17%).
| Day | High | Low | Chance of 0.01 in | Chance of 0.10 in |
|---|---|---|---|---|
| September 1 | 88°F | 52°F | 8% | 4% |
| September 8 | 86°F | 50°F | 9% | 5% |
| September 15 | 84°F | 49°F | 12% | 6% |
| September 22 | 82°F | 47°F | 14% | 7% |
| September 30 | 79°F | 44°F | 17% | 9% |
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 | 88°F | 52°F | 8% | 4% | 13 h 10 min |
| September 2 | 88°F | 52°F | 8% | 4% | 13 h 10 min |
| September 3 | 87°F | 51°F | 8% | 4% | 13 h 10 min |
| September 4 | 87°F | 51°F | 8% | 5% | 13 h |
| September 5 | 87°F | 51°F | 9% | 5% | 13 h |
| September 6 | 87°F | 51°F | 9% | 5% | 13 h |
| September 7 | 87°F | 51°F | 9% | 5% | 13 h |
| September 8 | 86°F | 50°F | 9% | 5% | 12 h 50 min |
| September 9 | 86°F | 50°F | 10% | 5% | 12 h 50 min |
| September 10 | 86°F | 50°F | 10% | 5% | 12 h 50 min |
| September 11 | 86°F | 50°F | 10% | 6% | 12 h 40 min |
| September 12 | 85°F | 49°F | 11% | 6% | 12 h 40 min |
| September 13 | 85°F | 49°F | 11% | 6% | 12 h 40 min |
| September 14 | 85°F | 49°F | 11% | 6% | 12 h 40 min |
| September 15 | 84°F | 49°F | 12% | 6% | 12 h 30 min |
| September 16 | 84°F | 48°F | 12% | 6% | 12 h 30 min |
| September 17 | 84°F | 48°F | 13% | 7% | 12 h 30 min |
| September 18 | 84°F | 48°F | 13% | 7% | 12 h 30 min |
| September 19 | 83°F | 48°F | 13% | 7% | 12 h 20 min |
| September 20 | 83°F | 47°F | 14% | 7% | 12 h 20 min |
| September 21 | 82°F | 47°F | 14% | 7% | 12 h 20 min |
| September 22 | 82°F | 47°F | 14% | 7% | 12 h 10 min |
| September 23 | 82°F | 46°F | 15% | 8% | 12 h 10 min |
| September 24 | 81°F | 46°F | 15% | 8% | 12 h 10 min |
| September 25 | 81°F | 46°F | 15% | 8% | 12 h 10 min |
| September 26 | 80°F | 46°F | 16% | 8% | 12 h |
| September 27 | 80°F | 45°F | 16% | 8% | 12 h |
| September 28 | 80°F | 45°F | 17% | 8% | 12 h |
| September 29 | 79°F | 45°F | 17% | 9% | 11 h 50 min |
| September 30 | 79°F | 44°F | 17% | 9% | 11 h 50 min |
- Normal high
- 84°FSeptember average
- Normal low
- 48°FSeptember average
- Precipitation
- 0.56 inmonth total
- Days with precipitation
- 30.01 inch or more
- Days at 90°F or more
- 9
- Nights at 32°F or colder
- 1
- Daylight
- 13 h 10 min to 11 h 50 minSeptember 1 to September 30
- Days at 70°F or more
- 28
- Days at 80°F or more
- 20
- Sunshine
- 88%of clear-sky sunlight (NASA)
Source: NOAA NCEI 1991-2020 daily normals, station USC00353445; monthly normals. Daylight is computed from the place's latitude with NOAA's solar equations.
Does it rain in Grants Pass in September?
On a given September day the chance of 0.01 inch or more is 12% on average, highest around September 30 (17%). In all, 0.56 in falls on 3 days of a normal September.
In a normal September in Grants Pass, 9 days reach 90°F and 1 nights fall to freezing.
Source: NOAA NCEI 1991-2020 daily and monthly normals, station USC00353445.
What are the records for September in Grants Pass?
The warmest September temperature on this station's record (since 1893) is 106°F, on September 4, 2020; the coldest is 24°F, on September 25, 1908. The wettest September brought 4.19 in (1977).
The September mean against the 1991-2020 normal of 66.1°F: 2021 66.8°F (+0.7), 2022 69.5°F (+3.4), 2023 66.2°F (+0.1), 2024 69.9°F (+3.8), 2026 64.5°F (−1.6). 4 of 5 ran warmer than normal.
| September | Mean | Against normal | Precip. |
|---|---|---|---|
| 2021 | 66.8°F | +0.7°F | 1.60 in |
| 2022 | 69.5°F | +3.4°F | 0.90 in |
| 2023 | 66.2°F | +0.1°F | 1.71 in |
| 2024 | 69.9°F | +3.8°F | 0.01 in |
| 2026 | 64.5°F | −1.6°F | – |
Source: records: ACIS, station USC00353445; recent months: ACIS, station USC00353445. Records and recent months use complete months only.
How does September in Grants Pass 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; Grants Pass's is 84°F.
Source: NOAA NCEI 1991-2020 monthly normals for every station in the state.
Other months and places
- Grants Pass in August91°F by day, 55°F at night
- Grants Pass in October70°F by day, 41°F at night
- Grants Pass 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