Portland, OR weather in October
October in Portland: cool, with frequent rain. Highs 63°F, lows 48°F, about 14 wet days.
- Normal high
- 63°F
- Normal low
- 48°F
- Wet days
- 14
- 3.4 in total
- Muggy days
- 0
- dew point 65°F+
How October changes from start to finish
| October 1 | October 31 | |
|---|---|---|
| Normal high | 70°F | 57°F |
| Normal low | 52°F | 44°F |
| Chance of a wet day | 34% | 51% |
| Sunrise / sunset | 7:09 am / 6:51 pm | 7:48 am / 5:59 pm |
| Daylight | 11.7 h | 10.2 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 October day
- 6 am50°Fdew point 46°F
- 9 am53°Fdew point 47°F
- Noon59°Fdew point 47°F
- 3 pm63°Fdew point 47°F
- 6 pm58°Fdew point 47°F
- 9 pm54°Fdew point 47°F
NOAA hourly normals (local standard time) from Portland Intl Airport (6 mi away); average wind 6 mph.
What kind of days to expect
- Comfortable dayshigh 65-80°F and dew point under 60°F11 of 31
- Hot dayshigh 90°F or more0 of 31
- Muggy daysdaily mean dew point 65°F or more0 of 31
- Wet daysat least 0.01 in of rain or melted snow14 of 31
- Notable rainat least 0.10 in8 of 31
- Freezing nightslow 32°F or below0 of 31
- Snow on the groundsnow depth 1 in or more0 of 31
Average days per October, counted from daily records for each year 1991-2020.
Rain in October
Normal precipitation is 3.4 in; a dry October brings about 1.8 in and a wet one about 3.8 in (25th and 75th percentiles). About 2 days bring half an inch or more, and about 1 an inch or more.
How October varies from year to year
- Warmest October, 1991-20202015: average high 68°F
- Coolest October2019: average high 59°F
- Wettest October1994: 8.4 in
- Driest October2002: 0.6 in
- Highest reading85°F (October 9, 1996)
- Lowest reading31°F (October 31, 2002)
From the station's daily records with NOAA quality flags removed; most recent date shown when a reading repeats.
October compared with September and November
| September | October | November | |
|---|---|---|---|
| Normal high | 75°F | 63°F | 52°F |
| Normal low | 55°F | 48°F | 42°F |
| Wet days | 7 | 14 | 18 |
| Comfortable days | 18 | 11 | 1 |
| Daylight | 12.5 h | 10.9 h | 9.5 h |
Highs change by -12°F from September and -11°F into November.
Nearby alternatives in October
- Drier: Bend, OR121 mi · high 63°F · 4 wet days
- Cooler: Port Angeles, WA183 mi · high 57°F · 14 wet days
How Portland ranks in October
- Normal high287th warmest of 378 cities; 5th of 6 in Oregon
- Wet days352nd driest of 378
- Comfortable days198th most of 340
What to pack for Portland in October
- A rain jacket or umbrella – rain on about 14 days
Heating and cooling
October has 302 heating degree days and 4 cooling degree days (base 65°F), 7% of the year's total heating and cooling demand.
Questions
How cold is Portland in October?
The normal high is 63°F and the normal low is 48°F. From 1991 to 2020 the coldest October reading was 31°F (most recently on October 31, 2002).
Does it rain a lot in Portland in October?
About 14 days in October have at least 0.01 in of precipitation, and the normal total is 3.4 in. The wettest October in 1991-2020 was in 1994 (8.4 in); the driest was in 2002 (0.6 in).
Is October a good time to visit Portland?
October ranks 7th of 12 months on our comfort score for Portland (57 out of 100). It has about 11 comfortable days. The best month is June.
Where the numbers come from
- Temperature: Portland Kgw-Tv (USC00356749), 0.7 mi WSW of the city center, 159 ft (127 ft higher than the city). NOAA normals and daily records, 1991-2020.
- Rain, snowfall, snow depth, frost dates and humidity and wind by hour: Portland Intl Airport (USW00024229), 5.9 mi NE of the city center, 19 ft . NOAA normals and daily records, 1991-2020.
- Daily humidity and wind: Portland International Airport (726980-24229), 6.0 mi NNE of the city center, 22 ft . Hourly observations, 1991-2020.
- Not available for this location: cloud cover (no station close enough or similar enough in elevation).