Davenport weather in September: Davenport, Iowa: normal highs, lows, rain and records for September
Davenport in September has a normal high of 76°F and a normal low of 53°F, a daily mean of 65°F, falling from 80°F on the 1st to 71°F by the 30th. Measurable precipitation falls on 10 days in a normal September, 3.47 inches in all. (NOAA 1991-2020 normals)
In metric: a normal high of 25°C and low of 12°C, 88 mm of precipitation in September.
- NOAA stationDavenport
- Station IDUSW00094982
- Location41.61°N 90.58°W
- Elevation754 ft (230 m)
- Population100,938
- Jan 30° 14°
- Feb 34° 18°
- Mar 48° 29°
- Apr 61° 39°
- May 73° 51°
- Jun 81° 61°
- Jul 84° 64°
- Aug 82° 62°
- Sep 76° 53°
- Oct 63° 42°
- Nov 48° 30°
- Dec 35° 20°
Each month: normal high (large) and low, °F. Fill: the month's normal mean, colder blue to hotter red.
How warm is Davenport in September?
The normal high is 76°F and the normal low 53°F, for a daily mean of 64.6°F. September is 7.1°F cooler than August and 12.1°F warmer than October. September is the 4th warmest month of the year in Davenport and the 6th wettest. Across the month the normal high falls 9°F, from 80°F on September 1 to 71°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 61°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 39%).
| Day | High | Low | Chance of 0.01 in | Chance of 0.10 in |
|---|---|---|---|---|
| September 1 | 80°F | 58°F | 39% | 18% |
| September 8 | 79°F | 56°F | 37% | 18% |
| September 15 | 77°F | 53°F | 35% | 18% |
| September 22 | 74°F | 51°F | 34% | 17% |
| September 30 | 71°F | 48°F | 32% | 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 | 80°F | 58°F | 39% | 18% | 13 h 10 min |
| September 2 | 80°F | 58°F | 39% | 18% | 13 h 10 min |
| September 3 | 80°F | 57°F | 38% | 18% | 13 h 10 min |
| September 4 | 80°F | 57°F | 38% | 18% | 13 h |
| September 5 | 79°F | 57°F | 38% | 18% | 13 h |
| September 6 | 79°F | 56°F | 37% | 18% | 13 h |
| September 7 | 79°F | 56°F | 37% | 18% | 12 h 50 min |
| September 8 | 79°F | 56°F | 37% | 18% | 12 h 50 min |
| September 9 | 78°F | 55°F | 37% | 18% | 12 h 50 min |
| September 10 | 78°F | 55°F | 36% | 18% | 12 h 50 min |
| September 11 | 78°F | 55°F | 36% | 18% | 12 h 40 min |
| September 12 | 78°F | 54°F | 36% | 18% | 12 h 40 min |
| September 13 | 77°F | 54°F | 36% | 18% | 12 h 40 min |
| September 14 | 77°F | 54°F | 35% | 18% | 12 h 40 min |
| September 15 | 77°F | 53°F | 35% | 18% | 12 h 30 min |
| September 16 | 76°F | 53°F | 35% | 18% | 12 h 30 min |
| September 17 | 76°F | 53°F | 35% | 18% | 12 h 30 min |
| September 18 | 76°F | 52°F | 35% | 18% | 12 h 20 min |
| September 19 | 75°F | 52°F | 34% | 18% | 12 h 20 min |
| September 20 | 75°F | 51°F | 34% | 17% | 12 h 20 min |
| September 21 | 75°F | 51°F | 34% | 17% | 12 h 20 min |
| September 22 | 74°F | 51°F | 34% | 17% | 12 h 10 min |
| September 23 | 74°F | 50°F | 33% | 17% | 12 h 10 min |
| September 24 | 74°F | 50°F | 33% | 17% | 12 h 10 min |
| September 25 | 73°F | 50°F | 33% | 17% | 12 h 10 min |
| September 26 | 73°F | 49°F | 33% | 17% | 12 h |
| September 27 | 72°F | 49°F | 33% | 17% | 12 h |
| September 28 | 72°F | 48°F | 33% | 17% | 12 h |
| September 29 | 71°F | 48°F | 32% | 17% | 11 h 50 min |
| September 30 | 71°F | 48°F | 32% | 17% | 11 h 50 min |
- Normal high
- 76°FSeptember average
- Normal low
- 53°FSeptember average
- Precipitation
- 3.47 inmonth total
- Days with precipitation
- 100.01 inch or more
- Days at 90°F or more
- 1
- Daylight
- 13 h 10 min to 11 h 50 minSeptember 1 to September 30
- Days at 70°F or more
- 24
- Days at 80°F or more
- 12
- Sunshine
- 81%of clear-sky sunlight (NASA)
Source: NOAA NCEI 1991-2020 daily normals, station USW00094982; monthly normals. Daylight is computed from the place's latitude with NOAA's solar equations.
Does it rain in Davenport in September?
On a given September day the chance of 0.01 inch or more is 35% on average, highest around September 1 (39%). In all, 3.47 in falls on 10 days of a normal September, 1 of them with an inch or more.
In a normal September in Davenport, 1 days reach 90°F.
Source: NOAA NCEI 1991-2020 daily and monthly normals, station USW00094982.
What are the records for September in Davenport?
The warmest September temperature on this station's record (since 1996) is 97°F, on September 9, 2013; the coldest is 31°F, on September 29, 2003. The wettest September brought 8.72 in (2020).
The September mean against the 1991-2020 normal of 64.6°F: 2021 68.7°F (+4.1), 2022 65.3°F (+0.7), 2023 68.7°F (+4.1), 2024 67.0°F (+2.4), 2026 69.5°F (+4.9). 5 of 5 ran warmer than normal.
| September | Mean | Against normal | Precip. |
|---|---|---|---|
| 2021 | 68.7°F | +4.1°F | 0.63 in |
| 2022 | 65.3°F | +0.7°F | 4.93 in |
| 2023 | 68.7°F | +4.1°F | 2.89 in |
| 2024 | 67.0°F | +2.4°F | 0.59 in |
| 2026 | 69.5°F | +4.9°F | 7.86 in |
Source: records: ACIS, station USW00094982; recent months: ACIS, station USW00094982. Records and recent months use complete months only.
How does September in Davenport 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; Davenport's is 76°F.
Source: NOAA NCEI 1991-2020 monthly normals for every station in the state.