Baraboo weather in September: Baraboo, Wisconsin: normal highs, lows, rain and records for September
Baraboo in September has a normal high of 74°F and a normal low of 50°F, a daily mean of 62°F, falling from 78°F on the 1st to 68°F by the 30th. Measurable precipitation falls on 10 days in a normal September, 3.85 inches in all. (NOAA 1991-2020 normals)
In metric: a normal high of 23°C and low of 10°C, 98 mm of precipitation in September.
- NOAA stationBaraboo
- Station IDUSC00470516
- Location43.46°N 89.73°W
- Elevation823 ft (251 m)
- From the centerunder 1 mile
- Population13,096
- Jan 28° 10°
- Feb 32° 13°
- Mar 44° 23°
- Apr 57° 34°
- May 70° 46°
- Jun 79° 56°
- Jul 83° 60°
- Aug 81° 58°
- Sep 74° 50°
- Oct 61° 38°
- Nov 46° 28°
- Dec 33° 17°
Each month: normal high (large) and low, °F. Fill: the month's normal mean, colder blue to hotter red.
How warm is Baraboo in September?
The normal high is 74°F and the normal low 50°F, for a daily mean of 61.7°F. September is 7.6°F cooler than August and 12.2°F warmer than October. September is the 4th warmest month of the year in Baraboo and the 6th wettest. Across the month the normal high falls 10°F, from 78°F on September 1 to 68°F on September 30. From one year to the next September's mean temperature typically moves about 2.8°F either way (NOAA's standard deviation), so roughly two Septembers in three average between 59°F and 65°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 35%).
| Day | High | Low | Chance of 0.01 in | Chance of 0.10 in |
|---|---|---|---|---|
| September 1 | 78°F | 55°F | 33% | 21% |
| September 8 | 77°F | 53°F | 34% | 21% |
| September 15 | 74°F | 50°F | 35% | 22% |
| September 22 | 72°F | 47°F | 35% | 22% |
| September 30 | 68°F | 44°F | 35% | 21% |
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 | 78°F | 55°F | 33% | 21% | 13 h 20 min |
| September 2 | 78°F | 54°F | 33% | 21% | 13 h 10 min |
| September 3 | 78°F | 54°F | 33% | 21% | 13 h 10 min |
| September 4 | 78°F | 54°F | 34% | 21% | 13 h 10 min |
| September 5 | 77°F | 53°F | 34% | 21% | 13 h |
| September 6 | 77°F | 53°F | 34% | 21% | 13 h |
| September 7 | 77°F | 53°F | 34% | 21% | 13 h |
| September 8 | 77°F | 53°F | 34% | 21% | 12 h 50 min |
| September 9 | 76°F | 52°F | 34% | 22% | 12 h 50 min |
| September 10 | 76°F | 52°F | 34% | 22% | 12 h 50 min |
| September 11 | 76°F | 52°F | 35% | 22% | 12 h 50 min |
| September 12 | 75°F | 51°F | 35% | 22% | 12 h 40 min |
| September 13 | 75°F | 51°F | 35% | 22% | 12 h 40 min |
| September 14 | 75°F | 50°F | 35% | 22% | 12 h 40 min |
| September 15 | 74°F | 50°F | 35% | 22% | 12 h 30 min |
| September 16 | 74°F | 50°F | 35% | 22% | 12 h 30 min |
| September 17 | 73°F | 49°F | 35% | 22% | 12 h 30 min |
| September 18 | 73°F | 49°F | 35% | 22% | 12 h 30 min |
| September 19 | 73°F | 49°F | 35% | 22% | 12 h 20 min |
| September 20 | 72°F | 48°F | 35% | 22% | 12 h 20 min |
| September 21 | 72°F | 48°F | 35% | 22% | 12 h 20 min |
| September 22 | 72°F | 47°F | 35% | 22% | 12 h 10 min |
| September 23 | 71°F | 47°F | 35% | 22% | 12 h 10 min |
| September 24 | 71°F | 47°F | 35% | 22% | 12 h 10 min |
| September 25 | 70°F | 46°F | 35% | 22% | 12 h 10 min |
| September 26 | 70°F | 46°F | 35% | 22% | 12 h |
| September 27 | 69°F | 46°F | 35% | 22% | 12 h |
| September 28 | 69°F | 45°F | 35% | 22% | 12 h |
| September 29 | 69°F | 45°F | 35% | 22% | 11 h 50 min |
| September 30 | 68°F | 44°F | 35% | 21% | 11 h 50 min |
- Normal high
- 74°FSeptember average
- Normal low
- 50°FSeptember average
- Precipitation
- 3.85 inmonth total
- Days with precipitation
- 100.01 inch or more
- Days at 90°F or more
- 1
- Nights at 32°F or colder
- 2
- Daylight
- 13 h 20 min to 11 h 50 minSeptember 1 to September 30
- Days at 70°F or more
- 21
- Days at 80°F or more
- 9
- Sunshine
- 77%of clear-sky sunlight (NASA)
Source: NOAA NCEI 1991-2020 daily normals, station USC00470516; monthly normals. Daylight is computed from the place's latitude with NOAA's solar equations.
Does it rain in Baraboo in September?
On a given September day the chance of 0.01 inch or more is 35% on average, highest around September 21 (35%). In all, 3.85 in falls on 10 days of a normal September, 1 of them with an inch or more.
In a normal September in Baraboo, 1 days reach 90°F and 2 nights fall to freezing.
Source: NOAA NCEI 1991-2020 daily and monthly normals, station USC00470516.
What are the records for September in Baraboo?
The warmest September temperature on this station's record (since 1893) is 99°F, on September 9, 1955; the coldest is 20°F, on September 29, 1949. The wettest September brought 11.28 in (1965).
The September mean against the 1991-2020 normal of 61.7°F: 2021 62.7°F (+1.0), 2022 61.2°F (−0.5), 2023 65.3°F (+3.6), 2024 64.6°F (+2.9), 2025 64.5°F (+2.8), 2026 64.2°F (+2.5). 5 of 6 ran warmer than normal.
| September | Mean | Against normal | Precip. |
|---|---|---|---|
| 2021 | 62.7°F | +1.0°F | 1.96 in |
| 2022 | 61.2°F | −0.5°F | 3.00 in |
| 2023 | 65.3°F | +3.6°F | 2.56 in |
| 2024 | 64.6°F | +2.9°F | 1.91 in |
| 2025 | 64.5°F | +2.8°F | 0.91 in |
| 2026 | 64.2°F | +2.5°F | 4.07 in |
Source: records: ACIS, station USC00470516; recent months: ACIS, station USC00470516. Records and recent months use complete months only.
How does September in Baraboo compare across Wisconsin?
Across the 165 places PlainClimate covers in Wisconsin, September normal highs run from 64°F in Laona to 77°F in West Allis; Baraboo's is 74°F.
Source: NOAA NCEI 1991-2020 monthly normals for every station in the state.