Wenatchee weather in September: Wenatchee, Washington: normal highs, lows, rain and records for September
Wenatchee in September has a normal high of 77°F and a normal low of 53°F, a daily mean of 65°F, falling from 82°F on the 1st to 70°F by the 30th. Measurable precipitation falls on 3 days in a normal September, 0.23 inches in all. (NOAA 1991-2020 normals)
In metric: a normal high of 25°C and low of 11°C, 6 mm of precipitation in September.
- NOAA stationWenatchee Pangborn Airport
- Station IDUSW00094239
- Location47.40°N 120.20°W
- Elevation1,229 ft (375 m)
- From the center7 miles
- Population35,401
- Jan 34° 24°
- Feb 42° 27°
- Mar 53° 34°
- Apr 62° 40°
- May 72° 49°
- Jun 78° 55°
- Jul 88° 62°
- Aug 86° 61°
- Sep 77° 53°
- Oct 61° 41°
- Nov 44° 31°
- Dec 33° 25°
Each month: normal high (large) and low, °F. Fill: the month's normal mean, colder blue to hotter red.
How warm is Wenatchee in September?
The normal high is 77°F and the normal low 53°F, for a daily mean of 64.6°F. September is 9.1°F cooler than August and 13.9°F warmer than October. September is the 4th warmest month of the year in Wenatchee and the 11th wettest. Across the month the normal high falls 12°F, from 82°F on September 1 to 70°F on September 30. From one year to the next September's mean temperature typically moves about 2.2°F either way (NOAA's standard deviation), so roughly two Septembers in three average between 62°F and 67°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 12%).
| Day | High | Low | Chance of 0.01 in | Chance of 0.10 in |
|---|---|---|---|---|
| September 1 | 82°F | 57°F | 7% | 2% |
| September 8 | 80°F | 55°F | 8% | 2% |
| September 15 | 77°F | 53°F | 9% | 2% |
| September 22 | 74°F | 51°F | 11% | 3% |
| September 30 | 70°F | 48°F | 12% | 3% |
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 | 82°F | 57°F | 7% | 2% | 13 h 30 min |
| September 2 | 82°F | 57°F | 8% | 2% | 13 h 20 min |
| September 3 | 81°F | 56°F | 8% | 2% | 13 h 20 min |
| September 4 | 81°F | 56°F | 8% | 2% | 13 h 20 min |
| September 5 | 81°F | 56°F | 8% | 2% | 13 h 10 min |
| September 6 | 80°F | 56°F | 8% | 2% | 13 h 10 min |
| September 7 | 80°F | 55°F | 8% | 2% | 13 h 10 min |
| September 8 | 80°F | 55°F | 8% | 2% | 13 h |
| September 9 | 79°F | 55°F | 8% | 2% | 13 h |
| September 10 | 79°F | 54°F | 9% | 2% | 13 h |
| September 11 | 79°F | 54°F | 9% | 2% | 12 h 50 min |
| September 12 | 78°F | 54°F | 9% | 2% | 12 h 50 min |
| September 13 | 78°F | 53°F | 9% | 2% | 12 h 50 min |
| September 14 | 78°F | 53°F | 9% | 2% | 12 h 40 min |
| September 15 | 77°F | 53°F | 9% | 2% | 12 h 40 min |
| September 16 | 77°F | 53°F | 10% | 2% | 12 h 40 min |
| September 17 | 77°F | 52°F | 10% | 2% | 12 h 30 min |
| September 18 | 76°F | 52°F | 10% | 2% | 12 h 30 min |
| September 19 | 76°F | 52°F | 10% | 3% | 12 h 30 min |
| September 20 | 75°F | 51°F | 10% | 3% | 12 h 20 min |
| September 21 | 75°F | 51°F | 10% | 3% | 12 h 20 min |
| September 22 | 74°F | 51°F | 11% | 3% | 12 h 20 min |
| September 23 | 74°F | 50°F | 11% | 3% | 12 h 10 min |
| September 24 | 73°F | 50°F | 11% | 3% | 12 h 10 min |
| September 25 | 73°F | 49°F | 11% | 3% | 12 h 10 min |
| September 26 | 72°F | 49°F | 11% | 3% | 12 h |
| September 27 | 72°F | 49°F | 12% | 3% | 12 h |
| September 28 | 71°F | 48°F | 12% | 3% | 12 h |
| September 29 | 71°F | 48°F | 12% | 3% | 11 h 50 min |
| September 30 | 70°F | 48°F | 12% | 3% | 11 h 50 min |
- Normal high
- 77°FSeptember average
- Normal low
- 53°FSeptember average
- Precipitation
- 0.23 inmonth total
- Days with precipitation
- 30.01 inch or more
- Days at 90°F or more
- 3
- Daylight
- 13 h 30 min to 11 h 50 minSeptember 1 to September 30
- Days at 70°F or more
- 25
- Days at 80°F or more
- 12
- Sunshine
- 79%of clear-sky sunlight (NASA)
Source: NOAA NCEI 1991-2020 daily normals, station USW00094239; monthly normals. Daylight is computed from the place's latitude with NOAA's solar equations.
Does it rain in Wenatchee in September?
On a given September day the chance of 0.01 inch or more is 10% on average, highest around September 30 (12%). In all, 0.23 in falls on 3 days of a normal September.
In a normal September in Wenatchee, 3 days reach 90°F.
Source: NOAA NCEI 1991-2020 daily and monthly normals, station USW00094239.
How humid and windy is Wenatchee in September?
At 3 p.m. the normal temperature is 70°F with 32% relative humidity and a dew point of 39°F; at 6 a.m. it is 50°F with 65% humidity. The wind averages 6.7 mph, most often from the west in the afternoon. A dew point under 50°F feels dry.
| Time | Temperature | Dew point | Humidity | Wind | Clear or few clouds |
|---|---|---|---|---|---|
| 6 a.m. | 50°F | 39°F | 65% | 5.8 mph | – |
| 9 a.m. | 57°F | 40°F | 54% | 6.1 mph | – |
| noon | 66°F | 39°F | 37% | 6.5 mph | – |
| 3 p.m. | 70°F | 39°F | 32% | 8.3 mph | – |
| 6 p.m. | 64°F | 40°F | 42% | 7.6 mph | – |
| 9 p.m. | 59°F | 39°F | 48% | 6.7 mph | – |
Source: NOAA NCEI 1991-2020 hourly normals, station USW00094239. 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 Wenatchee?
The warmest September temperature on this station's record (since 1959) is 101°F, on September 1, 1987; the coldest is 31°F, on September 29, 1985. The wettest September brought 2.31 in (1986).
The September mean against the 1991-2020 normal of 64.6°F: 2021 64.0°F (−0.6), 2022 67.8°F (+3.2), 2023 64.9°F (+0.3), 2024 70.0°F (+5.4), 2025 71.0°F (+6.4), 2026 63.0°F (−1.6). 4 of 6 ran warmer than normal.
| September | Mean | Against normal | Precip. |
|---|---|---|---|
| 2021 | 64.0°F | −0.6°F | 0.24 in |
| 2022 | 67.8°F | +3.2°F | 0.54 in |
| 2023 | 64.9°F | +0.3°F | 0.18 in |
| 2024 | 70.0°F | +5.4°F | 0.03 in |
| 2025 | 71.0°F | +6.4°F | 0.06 in |
| 2026 | 63.0°F | −1.6°F | 1.23 in |
Source: records: ACIS, station USW00094239; recent months: ACIS, station USW00094239. Records and recent months use complete months only.
How does September in Wenatchee compare across Washington?
Across the 96 places PlainClimate covers in Washington, September normal highs run from 66°F in Coupeville to 81°F in Pasco; Wenatchee's is 77°F.
Source: NOAA NCEI 1991-2020 monthly normals for every station in the state.