Vancouver, WA weather in September
September in Vancouver: mild, with some rain. Highs 77°F, lows 54°F, rain on about 7 days. A great month for outdoor plans.
- Normal high
- 77°F
- Normal low
- 54°F
- Wet days
- 7
- 1.5 in total
- Muggy days
- 0
- dew point 65°F+
How September changes from start to finish
| September 1 | September 30 | |
|---|---|---|
| Normal high | 80°F | 72°F |
| Normal low | 57°F | 51°F |
| Chance of a wet day | 18% | 30% |
| Sunrise / sunset | 6:32 am / 7:49 pm | 7:07 am / 6:53 pm |
| Daylight | 13.3 h | 11.8 h |
Chance of a wet day: average for the first and last 7 days of the month. Times are local clock time (Pacific Time).
A typical September day
- 6 am56°Fdew point 52°F
- 9 am61°Fdew point 52°F
- Noon69°Fdew point 51°F
- 3 pm74°Fdew point 50°F
- 6 pm71°Fdew point 51°F
- 9 pm64°Fdew point 53°F
NOAA hourly normals (local standard time) from Portland Intl Airport (4 mi away); average wind 6 mph.
What kind of days to expect
- Comfortable dayshigh 65-80°F and dew point under 60°F18 of 30
- Hot dayshigh 90°F or more2 of 30
- Muggy daysdaily mean dew point 65°F or more0 of 30
- Wet daysat least 0.01 in of rain or melted snow7 of 30
- Notable rainat least 0.10 in4 of 30
- Freezing nightslow 32°F or below0 of 30
- Snow on the groundsnow depth 1 in or more0 of 30
Average days per September, counted from daily records for each year 1991-2020.
Rain in September
Normal precipitation is 1.5 in; a dry September brings about 0.9 in and a wet one about 1.9 in (25th and 75th percentiles). About 1 day brings half an inch or more.
How September varies from year to year
- Warmest September, 1991-20201991: average high 81°F
- Coolest September1996: average high 71°F
- Wettest September2013: 5.6 in
- Driest September1993: no measurable precipitation
- Highest reading98°F (September 2, 2017)
- Lowest reading39°F (September 30, 2019)
From the station's daily records with NOAA quality flags removed; most recent date shown when a reading repeats.
September compared with August and October
| August | September | October | |
|---|---|---|---|
| Normal high | 82°F | 77°F | 64°F |
| Normal low | 59°F | 54°F | 47°F |
| Wet days | 4 | 7 | 14 |
| Comfortable days | 13 | 18 | 12 |
| Daylight | 14.1 h | 12.5 h | 10.9 h |
Highs change by -5°F from August and -13°F into October.
Nearby alternatives in September
- Drier: Bend, OR128 mi · high 76°F · 2 wet days
- Cooler: Cannon Beach, OR65 mi · high 68°F · 9 wet days
How Vancouver ranks in September
- Normal high247th warmest of 378 cities; 2nd of 9 in Washington
- Wet days136th driest of 378
- Comfortable days30th most of 342
Heating and cooling
September has 61 heating degree days and 73 cooling degree days (base 65°F), 3% of the year's total heating and cooling demand.
Questions
How hot is Vancouver in September?
The normal high is 77°F and the normal low is 54°F. From 1991 to 2020 the hottest September reading was 98°F (September 2, 2017).
Does it rain a lot in Vancouver in September?
About 7 days in September have at least 0.01 in of precipitation, and the normal total is 1.5 in. The wettest September in 1991-2020 was in 2013 (5.6 in); the driest was in 1993, with no measurable precipitation.
Is September a good time to visit Vancouver?
September ranks 4th of 12 months on our comfort score for Vancouver (73 out of 100). It has about 18 comfortable days and about 2 days at 90°F or hotter. The best month is June.
Where the numbers come from
- Temperature, rain, snowfall, snow depth, frost dates and humidity and wind by hour: Portland Intl Airport (USW00024229), 4.4 mi SE of the city center, 19 ft (172 ft lower than the city). NOAA normals and daily records, 1991-2020.
- Daily humidity and wind: Portland International Airport (726980-24229), 3.9 mi SE of the city center, 22 ft (169 ft lower than the city). Hourly observations, 1991-2020.
- Not available for this location: cloud cover (no station close enough or similar enough in elevation).