Pendleton weather in September: Pendleton, Oregon: normal highs, lows, rain and records for September
Pendleton in September has a normal high of 78°F and a normal low of 49°F, a daily mean of 64°F, falling from 83°F on the 1st to 72°F by the 30th. Measurable precipitation falls on 4 days in a normal September, 0.53 inches in all. (NOAA 1991-2020 normals)
In metric: a normal high of 26°C and low of 9°C, 13 mm of precipitation in September.
- NOAA stationPendleton E Or Regional Airport
- Station IDUSW00024155
- Location45.69°N 118.85°W
- Elevation1,515 ft (462 m)
- From the center2 miles
- Population17,026
- Jan 42° 28°
- Feb 46° 30°
- Mar 55° 34°
- Apr 62° 38°
- May 71° 45°
- Jun 78° 51°
- Jul 89° 57°
- Aug 88° 56°
- Sep 78° 49°
- Oct 64° 39°
- Nov 49° 32°
- Dec 41° 28°
Each month: normal high (large) and low, °F. Fill: the month's normal mean, colder blue to hotter red.
How warm is Pendleton in September?
The normal high is 78°F and the normal low 49°F, for a daily mean of 63.5°F. September is 8.3°F cooler than August and 12.0°F warmer than October. September is the 4th warmest month of the year in Pendleton and the 10th wettest. Across the month the normal high falls 11°F, from 83°F on September 1 to 72°F on September 30. From one year to the next September's mean temperature typically moves about 2.0°F either way (NOAA's standard deviation), so roughly two Septembers in three average between 62°F and 66°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 18%).
| Day | High | Low | Chance of 0.01 in | Chance of 0.10 in |
|---|---|---|---|---|
| September 1 | 83°F | 53°F | 10% | 4% |
| September 8 | 81°F | 51°F | 11% | 5% |
| September 15 | 79°F | 49°F | 14% | 6% |
| September 22 | 76°F | 47°F | 16% | 6% |
| September 30 | 72°F | 45°F | 18% | 7% |
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 | 83°F | 53°F | 10% | 4% | 13 h 20 min |
| September 2 | 83°F | 53°F | 10% | 4% | 13 h 20 min |
| September 3 | 82°F | 52°F | 10% | 4% | 13 h 10 min |
| September 4 | 82°F | 52°F | 10% | 5% | 13 h 10 min |
| September 5 | 82°F | 52°F | 11% | 5% | 13 h 10 min |
| September 6 | 82°F | 52°F | 11% | 5% | 13 h 10 min |
| September 7 | 81°F | 51°F | 11% | 5% | 13 h |
| September 8 | 81°F | 51°F | 11% | 5% | 13 h |
| September 9 | 81°F | 51°F | 12% | 5% | 13 h |
| September 10 | 80°F | 51°F | 12% | 5% | 12 h 50 min |
| September 11 | 80°F | 50°F | 12% | 5% | 12 h 50 min |
| September 12 | 80°F | 50°F | 12% | 5% | 12 h 50 min |
| September 13 | 79°F | 50°F | 13% | 5% | 12 h 40 min |
| September 14 | 79°F | 50°F | 13% | 6% | 12 h 40 min |
| September 15 | 79°F | 49°F | 14% | 6% | 12 h 40 min |
| September 16 | 78°F | 49°F | 14% | 6% | 12 h 30 min |
| September 17 | 78°F | 49°F | 14% | 6% | 12 h 30 min |
| September 18 | 77°F | 49°F | 15% | 6% | 12 h 30 min |
| September 19 | 77°F | 48°F | 15% | 6% | 12 h 20 min |
| September 20 | 77°F | 48°F | 15% | 6% | 12 h 20 min |
| September 21 | 76°F | 48°F | 15% | 6% | 12 h 20 min |
| September 22 | 76°F | 47°F | 16% | 6% | 12 h 10 min |
| September 23 | 75°F | 47°F | 16% | 6% | 12 h 10 min |
| September 24 | 75°F | 47°F | 16% | 6% | 12 h 10 min |
| September 25 | 74°F | 46°F | 17% | 7% | 12 h 10 min |
| September 26 | 74°F | 46°F | 17% | 7% | 12 h |
| September 27 | 73°F | 46°F | 17% | 7% | 12 h |
| September 28 | 73°F | 45°F | 18% | 7% | 12 h |
| September 29 | 72°F | 45°F | 18% | 7% | 11 h 50 min |
| September 30 | 72°F | 45°F | 18% | 7% | 11 h 50 min |
- Normal high
- 78°FSeptember average
- Normal low
- 49°FSeptember average
- Precipitation
- 0.53 inmonth total
- Days with precipitation
- 40.01 inch or more
- Days at 90°F or more
- 3
- Daylight
- 13 h 20 min to 11 h 50 minSeptember 1 to September 30
- Days at 70°F or more
- 25
- Days at 80°F or more
- 14
- Sunshine
- 86%of clear-sky sunlight (NASA)
Source: NOAA NCEI 1991-2020 daily normals, station USW00024155; monthly normals. Daylight is computed from the place's latitude with NOAA's solar equations.
Does it rain in Pendleton in September?
On a given September day the chance of 0.01 inch or more is 14% on average, highest around September 30 (18%). In all, 0.53 in falls on 4 days of a normal September.
In a normal September in Pendleton, 3 days reach 90°F.
Source: NOAA NCEI 1991-2020 daily and monthly normals, station USW00024155.
How humid and windy is Pendleton in September?
At 3 p.m. the normal temperature is 71°F with 31% relative humidity and a dew point of 39°F; at 6 a.m. it is 48°F with 68% humidity. The wind averages 7.7 mph, most often from the west-northwest in the afternoon. A dew point under 50°F feels dry.
| Time | Temperature | Dew point | Humidity | Wind | Clear or few clouds |
|---|---|---|---|---|---|
| 6 a.m. | 48°F | 38°F | 68% | 6.6 mph | 78% |
| 9 a.m. | 59°F | 40°F | 48% | 5.9 mph | 76% |
| noon | 68°F | 39°F | 35% | 9.2 mph | 80% |
| 3 p.m. | 71°F | 39°F | 31% | 9.6 mph | 78% |
| 6 p.m. | 63°F | 39°F | 42% | 7.3 mph | 81% |
| 9 p.m. | 56°F | 39°F | 53% | 8.1 mph | 80% |
Source: NOAA NCEI 1991-2020 hourly normals, station USW00024155. Hourly normals exist only for NOAA's first-order stations; a dash where NOAA publishes no value for that hour (the sky at some hours).
What are the records for September in Pendleton?
The warmest September temperature on Pendleton's official record (since 1892) is 104°F, on September 3, 1930; the coldest is 21°F, on September 25, 1926. The wettest September brought 2.70 in (1927).
The September mean against the 1991-2020 normal of 63.5°F: 2021 63.6°F (+0.1), 2022 67.1°F (+3.6), 2023 64.6°F (+1.1), 2024 68.3°F (+4.8), 2025 68.5°F (+5.0), 2026 61.3°F (−2.2). 5 of 6 ran warmer than normal.
| September | Mean | Against normal | Precip. |
|---|---|---|---|
| 2021 | 63.6°F | +0.1°F | 0.63 in |
| 2022 | 67.1°F | +3.6°F | 0.09 in |
| 2023 | 64.6°F | +1.1°F | 0.90 in |
| 2024 | 68.3°F | +4.8°F | 0.42 in |
| 2025 | 68.5°F | +5.0°F | 0.72 in |
| 2026 | 61.3°F | −2.2°F | 1.07 in |
Source: records: ACIS, NWS threaded record PDTthr; recent months: ACIS, station USW00024155. Records and recent months use complete months only.
How does September in Pendleton 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; Pendleton's is 78°F.
Source: NOAA NCEI 1991-2020 monthly normals for every station in the state.