Ankeny weather in September: Ankeny, Iowa: normal highs, lows, rain and records for September
Ankeny in September has a normal high of 77°F and a normal low of 53°F, a daily mean of 65°F, falling from 81°F on the 1st to 72°F by the 30th. Measurable precipitation falls on 8 days in a normal September, 3.62 inches in all. (NOAA 1991-2020 normals)
In metric: a normal high of 25°C and low of 12°C, 92 mm of precipitation in September.
- NOAA stationAnkeny
- Station IDUSC00130241
- Location41.73°N 93.65°W
- Elevation975 ft (297 m)
- From the center3 miles
- Population76,727
- Jan 30° 12°
- Feb 34° 16°
- Mar 47° 27°
- Apr 61° 38°
- May 72° 50°
- Jun 82° 61°
- Jul 86° 65°
- Aug 84° 62°
- Sep 77° 53°
- Oct 64° 41°
- Nov 48° 29°
- Dec 35° 18°
Each month: normal high (large) and low, °F. Fill: the month's normal mean, colder blue to hotter red.
How warm is Ankeny in September?
The normal high is 77°F and the normal low 53°F, for a daily mean of 65.0°F. September is 7.7°F cooler than August and 13.0°F warmer than October. September is the 4th warmest month of the year in Ankeny and the 6th wettest. Across the month the normal high falls 9°F, from 81°F on September 1 to 72°F on September 30. From one year to the next September's mean temperature typically moves about 3.1°F either way (NOAA's standard deviation), so roughly two Septembers in three average between 62°F and 68°F.
Bars above: each day's normal high to low. Columns below: the chance of 0.01 inch or more of precipitation that day, on a scale of 0 to 100% (highest 28%).
| Day | High | Low | Chance of 0.01 in | Chance of 0.10 in |
|---|---|---|---|---|
| September 1 | 81°F | 58°F | 28% | 18% |
| September 8 | 80°F | 56°F | 28% | 18% |
| September 15 | 78°F | 53°F | 28% | 18% |
| September 22 | 75°F | 50°F | 27% | 18% |
| September 30 | 72°F | 47°F | 27% | 17% |
Every day of September: normal high, low and chance of precipitation (warmest afternoon September 1, coldest night September 30)
| Day | High | Low | Chance of 0.01 in | Chance of 0.10 in | Daylight |
|---|---|---|---|---|---|
| September 1 | 81°F | 58°F | 28% | 18% | 13 h 10 min |
| September 2 | 81°F | 58°F | 28% | 18% | 13 h 10 min |
| September 3 | 81°F | 58°F | 28% | 18% | 13 h 10 min |
| September 4 | 81°F | 57°F | 28% | 18% | 13 h |
| September 5 | 80°F | 57°F | 28% | 18% | 13 h |
| September 6 | 80°F | 57°F | 28% | 18% | 13 h |
| September 7 | 80°F | 56°F | 28% | 18% | 12 h 50 min |
| September 8 | 80°F | 56°F | 28% | 18% | 12 h 50 min |
| September 9 | 79°F | 56°F | 28% | 18% | 12 h 50 min |
| September 10 | 79°F | 55°F | 28% | 18% | 12 h 50 min |
| September 11 | 79°F | 55°F | 28% | 18% | 12 h 40 min |
| September 12 | 79°F | 54°F | 28% | 18% | 12 h 40 min |
| September 13 | 78°F | 54°F | 28% | 18% | 12 h 40 min |
| September 14 | 78°F | 54°F | 28% | 18% | 12 h 40 min |
| September 15 | 78°F | 53°F | 28% | 18% | 12 h 30 min |
| September 16 | 77°F | 53°F | 28% | 18% | 12 h 30 min |
| September 17 | 77°F | 53°F | 28% | 18% | 12 h 30 min |
| September 18 | 77°F | 52°F | 28% | 18% | 12 h 20 min |
| September 19 | 76°F | 52°F | 28% | 18% | 12 h 20 min |
| September 20 | 76°F | 51°F | 28% | 18% | 12 h 20 min |
| September 21 | 76°F | 51°F | 28% | 18% | 12 h 20 min |
| September 22 | 75°F | 50°F | 27% | 18% | 12 h 10 min |
| September 23 | 75°F | 50°F | 27% | 18% | 12 h 10 min |
| September 24 | 74°F | 50°F | 27% | 17% | 12 h 10 min |
| September 25 | 74°F | 49°F | 27% | 17% | 12 h 10 min |
| September 26 | 74°F | 49°F | 27% | 17% | 12 h |
| September 27 | 73°F | 48°F | 27% | 17% | 12 h |
| September 28 | 73°F | 48°F | 27% | 17% | 12 h |
| September 29 | 72°F | 48°F | 27% | 17% | 11 h 50 min |
| September 30 | 72°F | 47°F | 27% | 17% | 11 h 50 min |
- Normal high
- 77°FSeptember average
- Normal low
- 53°FSeptember average
- Precipitation
- 3.62 inmonth total
- Days with precipitation
- 80.01 inch or more
- Days at 90°F or more
- 3
- Nights at 32°F or colder
- 1
- Daylight
- 13 h 10 min to 11 h 50 minSeptember 1 to September 30
- Days at 70°F or more
- 23
- Days at 80°F or more
- 14
- Sunshine
- 80%of clear-sky sunlight (NASA)
Source: NOAA NCEI 1991-2020 daily normals, station USC00130241; monthly normals. Daylight is computed from the place's latitude with NOAA's solar equations.
Does it rain in Ankeny in September?
On a given September day the chance of 0.01 inch or more is 28% on average, highest around September 1 (28%). In all, 3.62 in falls on 8 days of a normal September, 1 of them with an inch or more.
In a normal September in Ankeny, 3 days reach 90°F and 1 nights fall to freezing.
Source: NOAA NCEI 1991-2020 daily and monthly normals, station USC00130241.
What are the records for September in Ankeny?
The warmest September temperature on this station's record (since 1950) is 100°F, on September 10, 2013; the coldest is 22°F, on September 21, 1999. The wettest September brought 7.85 in (1961).
Source: records: ACIS, station USC00130241. Records and recent months use complete months only.
How does September in Ankeny compare across Iowa?
Across the 132 places PlainClimate covers in Iowa, September normal highs run from 71°F in Northwood to 79°F in Glenwood; Ankeny's is 77°F.
Source: NOAA NCEI 1991-2020 monthly normals for every station in the state.