Eugene, OR weather in September
Eugene is mild and mostly dry in September: highs average 78°F and nights drop to about 48°F. Rain falls on about 6 days. A great month for outdoor plans.
- Normal high
- 78°F
- Normal low
- 48°F
- Wet days
- 6
- 1.4 in total
- Muggy days
- 0
- dew point 65°F+
How September changes from start to finish
| September 1 | September 30 | |
|---|---|---|
| Normal high | 82°F | 73°F |
| Normal low | 50°F | 45°F |
| Chance of a wet day | 15% | 27% |
| Sunrise / sunset | 6:35 am / 7:49 pm | 7:08 am / 6:55 pm |
| Daylight | 13.2 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 am51°Fdew point 47°F
- 9 am61°Fdew point 51°F
- Noon71°Fdew point 50°F
- 3 pm76°Fdew point 49°F
- 6 pm71°Fdew point 50°F
- 9 pm60°Fdew point 50°F
NOAA hourly normals (local standard time) from Eugene Mahlon Sweet Airport (9 mi away); average wind 7 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 snow6 of 30
- Notable rainat least 0.10 in3 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 1.4 in; a dry September brings about 0.4 in and a wet one about 1.8 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 82°F
- Coolest September2004: average high 72°F
- Wettest September2013: 7.1 in
- Driest September1993: no measurable precipitation
- Highest reading98°F (September 5, 2014)
- Lowest reading31°F (September 23, 2000)
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 | 84°F | 78°F | 65°F |
| Normal low | 52°F | 48°F | 42°F |
| Wet days | 3 | 6 | 12 |
| Comfortable days | 10 | 18 | 13 |
| Daylight | 14.0 h | 12.5 h | 11.0 h |
Highs change by -6°F from August and -13°F into October.
Nearby alternatives in September
- Drier: Bend, OR88 mi · high 76°F · 2 wet days
- Cooler: Cannon Beach, OR134 mi · high 68°F · 9 wet days
How Eugene ranks in September
- Normal high222nd warmest of 378 cities; 1st of 6 in Oregon
- Wet days105th driest of 378
- Comfortable days31st most of 342
What to pack for Eugene in September
- Layers – afternoons near 78°F but nights near 48°F
Heating and cooling
September has 101 heating degree days and 38 cooling degree days (base 65°F), 3% of the year's total heating and cooling demand.
Questions
How hot is Eugene in September?
The normal high is 78°F and the normal low is 48°F. From 1991 to 2020 the hottest September reading was 98°F (September 5, 2014).
Does it rain a lot in Eugene in September?
About 6 days in September have at least 0.01 in of precipitation, and the normal total is 1.4 in. The wettest September in 1991-2020 was in 2013 (7.1 in); the driest was in 1993, with no measurable precipitation.
Is September a good time to visit Eugene?
September ranks 3rd of 12 months on our comfort score for Eugene (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, frost dates and humidity and wind by hour: Eugene Mahlon Sweet Airport (USW00024221), 8.5 mi NW of the city center, 353 ft (77 ft lower than the city). NOAA normals and daily records, 1991-2020.
- Snowfall and snow depth: Cottage Grove 2E (USC00351897), 18 mi S of the city center, 595 ft (165 ft higher than the city). NOAA normals and daily records, 1991-2020.
- Daily humidity and wind: Mahlon Sweet Field Airport (726930-24221), 8.5 mi NW of the city center, 358 ft (72 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).