Aberdeen, SD weather in September
In September, Aberdeen sees highs around 75°F and lows around 47°F: mild, with some rain. There are about 8 days with rain. Good for outdoor plans.
- Normal high
- 75°F
- Normal low
- 47°F
- Wet days
- 8
- 2.0 in total
- Muggy days
- 1
- dew point 65°F+
How September changes from start to finish
| September 1 | September 30 | |
|---|---|---|
| Normal high | 80°F | 69°F |
| Normal low | 52°F | 41°F |
| Chance of a wet day | 26% | 26% |
| Sunrise / sunset | 6:55 am / 8:12 pm | 7:31 am / 7:16 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 (Central Time).
A typical September day
- 6 am51°Fdew point 47°F
- 9 am59°Fdew point 50°F
- Noon68°Fdew point 50°F
- 3 pm72°Fdew point 49°F
- 6 pm68°Fdew point 50°F
- 9 pm58°Fdew point 50°F
NOAA hourly normals (local standard time) from Aberdeen (4 mi away); average wind 10 mph.
What kind of days to expect
- Comfortable dayshigh 65-80°F and dew point under 60°F14 of 30
- Hot dayshigh 90°F or more2 of 30
- Muggy daysdaily mean dew point 65°F or more1 of 30
- Wet daysat least 0.01 in of rain or melted snow8 of 30
- Notable rainat least 0.10 in4 of 30
- Freezing nightslow 32°F or below2 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 2.0 in; a dry September brings about 0.9 in and a wet one about 2.7 in (25th and 75th percentiles). About 1 day brings half an inch or more.
How September varies from year to year
- Warmest September, 1991-20201998: average high 79°F
- Coolest September1999: average high 67°F
- Wettest September1996: 5.3 in
- Driest September2012: 0.01 in
- Highest reading96°F (September 7, 2002)
- Lowest reading20°F (September 22, 1995)
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 | 83°F | 75°F | 59°F |
| Normal low | 57°F | 47°F | 33°F |
| Wet days | 8 | 8 | 8 |
| Comfortable days | 10 | 14 | 8 |
| Daylight | 14.1 h | 12.5 h | 10.9 h |
Highs change by -8°F from August and -16°F into October.
Nearby alternatives in September
- Cooler: Grand Forks, ND183 mi · high 70°F · 9 wet days
How Aberdeen ranks in September
- Normal high286th warmest of 378 cities; 3rd of 4 in South Dakota
- Wet days185th driest of 378
- Comfortable days96th most of 342
What to pack for Aberdeen in September
- Layers – afternoons near 75°F but nights near 47°F
Frost in September
The first fall frost typically comes around Sep 26; in 1 year in 10 it comes before Sep 14. All frost dates for Aberdeen.
Heating and cooling
September has 180 heating degree days and 56 cooling degree days (base 65°F), 3% of the year's total heating and cooling demand.
Questions
How hot is Aberdeen in September?
The normal high is 75°F and the normal low is 47°F. From 1991 to 2020 the hottest September reading was 96°F (most recently on September 7, 2002).
Does it rain a lot in Aberdeen in September?
About 8 days in September have at least 0.01 in of precipitation, and the normal total is 2.0 in. The wettest September in 1991-2020 was in 1996 (5.3 in); the driest was in 2012 (0.01 in).
Is September a good time to visit Aberdeen?
September ranks 3rd of 12 months on our comfort score for Aberdeen (69 out of 100). It has about 14 comfortable days and about 2 days at 90°F or hotter. The best month is May.
Where the numbers come from
- Temperature, rain, snowfall, snow depth, frost dates and humidity and wind by hour: Aberdeen (USW00014929), 3.6 mi E of the city center, 1,302 ft . NOAA normals and daily records, 1991-2020.
- Daily humidity and wind: Aberdeen Regional Airport (726590-14929), 3.8 mi ESE of the city center, 1,298 ft . Hourly observations, 1991-2020.
- Not available for this location: cloud cover (no station close enough or similar enough in elevation).