Columbia, MO weather in September
Columbia is warm in September, with some rain: highs average 80°F and nights drop to about 58°F. Expect about 7 wet days. A good month for most outdoor plans.
- Normal high
- 80°F
- Normal low
- 58°F
- Wet days
- 7
- 3.8 in total
- Muggy days
- 7
- dew point 65°F+
How September changes from start to finish
| September 1 | September 30 | |
|---|---|---|
| Normal high | 85°F | 75°F |
| Normal low | 64°F | 53°F |
| Chance of a wet day | 25% | 26% |
| Sunrise / sunset | 6:38 am / 7:40 pm | 7:04 am / 6:54 pm |
| Daylight | 13.0 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 am60°Fdew point 56°F
- 9 am69°Fdew point 59°F
- Noon76°Fdew point 58°F
- 3 pm78°Fdew point 58°F
- 6 pm72°Fdew point 59°F
- 9 pm66°Fdew point 58°F
NOAA hourly normals (local standard time) from Columbia Rgnl Airport (11 mi away); average wind 8 mph; clear or few clouds in 67% of daytime hours, mostly cloudy or overcast in 26%.
What kind of days to expect
- Comfortable dayshigh 65-80°F and dew point under 60°F11 of 30
- Hot dayshigh 90°F or more3 of 30
- Muggy daysdaily mean dew point 65°F or more7 of 30
- Wet daysat least 0.01 in of rain or melted snow7 of 30
- Notable rainat least 0.10 in5 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 3.8 in; a dry September brings about 1.8 in and a wet one about 4.8 in (25th and 75th percentiles). About 3 days bring half an inch or more, and about 1 an inch or more.
How September varies from year to year
- Warmest September, 1991-20202019: average high 86°F
- Coolest September1993: average high 73°F
- Wettest September1993: 12.1 in
- Driest September1994: 1.0 in
- Highest reading98°F (September 1, 2011)
- Lowest reading33°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 | 88°F | 80°F | 68°F |
| Normal low | 67°F | 58°F | 47°F |
| Wet days | 9 | 7 | 9 |
| Comfortable days | 3 | 11 | 14 |
| Daylight | 13.7 h | 12.4 h | 11.2 h |
Highs change by -8°F from August and -12°F into October.
How Columbia ranks in September
- Normal high197th warmest of 378 cities; 5th of 7 in Missouri
- Wet days162nd driest of 378
- Comfortable days142nd most of 342
Heating and cooling
September has 47 heating degree days and 173 cooling degree days (base 65°F), 4% of the year's total heating and cooling demand.
Questions
How hot is Columbia in September?
The normal high is 80°F and the normal low is 58°F. From 1991 to 2020 the hottest September reading was 98°F (September 1, 2011).
Does it rain a lot in Columbia in September?
About 7 days in September have at least 0.01 in of precipitation, and the normal total is 3.8 in. The wettest September in 1991-2020 was in 1993 (12.1 in); the driest was in 1994 (1.0 in).
Is September a good time to visit Columbia?
September ranks 4th of 12 months on our comfort score for Columbia (62 out of 100). It has about 11 comfortable days and about 3 days at 90°F or hotter. The best months are April and May.
Where the numbers come from
- Temperature, rain, snowfall, snow depth, humidity and wind by hour and cloud cover: Columbia Rgnl Airport (USW00003945), 11 mi SE of the city center, 893 ft (186 ft higher than the city). NOAA normals and daily records, 1991-2020.
- Frost dates: Columbia U Of M (USC00231801), 1.0 mi SE of the city center, 770 ft (63 ft higher than the city). NOAA normals and daily records, 1991-2020.
- Daily humidity and wind: Columbia Regional Airport (724450-03945), 11 mi SE of the city center, 893 ft (186 ft higher than the city). Hourly observations, 1991-2020.