Valparaiso weather in September: Valparaiso, Indiana: normal highs, lows, rain and records for September
Valparaiso in September has a normal high of 78°F and a normal low of 55°F, a daily mean of 66°F, falling from 82°F on the 1st to 73°F by the 30th. Measurable precipitation falls on 10 days in a normal September, 2.51 inches in all. (NOAA 1991-2020 normals)
In metric: a normal high of 25°C and low of 13°C, 64 mm of precipitation in September.
- NOAA stationValparaiso Porter County Municipal Airport
- Station IDUSW00004846
- Location41.45°N 87.01°W
- Elevation770 ft (235 m)
- Population35,065
- Jan 34° 18°
- Feb 38° 22°
- Mar 49° 31°
- Apr 62° 40°
- May 73° 51°
- Jun 82° 61°
- Jul 85° 64°
- Aug 83° 62°
- Sep 78° 55°
- Oct 65° 44°
- Nov 51° 34°
- Dec 39° 25°
Each month: normal high (large) and low, °F. Fill: the month's normal mean, colder blue to hotter red.
How warm is Valparaiso in September?
The normal high is 78°F and the normal low 55°F, for a daily mean of 66.2°F. September is 6.6°F cooler than August and 11.6°F warmer than October. September is the 4th warmest month of the year in Valparaiso and the 7th wettest. Across the month the normal high falls 9°F, from 82°F on September 1 to 73°F on September 30. From one year to the next September's mean temperature typically moves about 2.7°F either way (NOAA's standard deviation), so roughly two Septembers in three average between 64°F and 69°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 36%).
| Day | High | Low | Chance of 0.01 in | Chance of 0.10 in |
|---|---|---|---|---|
| September 1 | 82°F | 60°F | 36% | 19% |
| September 8 | 80°F | 58°F | 36% | 18% |
| September 15 | 78°F | 55°F | 35% | 18% |
| September 22 | 76°F | 53°F | 34% | 18% |
| September 30 | 73°F | 50°F | 35% | 19% |
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 | 82°F | 60°F | 36% | 19% | 13 h 10 min |
| September 2 | 81°F | 59°F | 36% | 19% | 13 h 10 min |
| September 3 | 81°F | 59°F | 36% | 19% | 13 h |
| September 4 | 81°F | 59°F | 36% | 18% | 13 h |
| September 5 | 81°F | 59°F | 36% | 18% | 13 h |
| September 6 | 81°F | 58°F | 36% | 18% | 13 h |
| September 7 | 80°F | 58°F | 36% | 18% | 12 h 50 min |
| September 8 | 80°F | 58°F | 36% | 18% | 12 h 50 min |
| September 9 | 80°F | 57°F | 35% | 18% | 12 h 50 min |
| September 10 | 80°F | 57°F | 35% | 18% | 12 h 50 min |
| September 11 | 79°F | 57°F | 35% | 18% | 12 h 40 min |
| September 12 | 79°F | 56°F | 35% | 18% | 12 h 40 min |
| September 13 | 79°F | 56°F | 35% | 18% | 12 h 40 min |
| September 14 | 78°F | 56°F | 35% | 18% | 12 h 40 min |
| September 15 | 78°F | 55°F | 35% | 18% | 12 h 30 min |
| September 16 | 78°F | 55°F | 35% | 18% | 12 h 30 min |
| September 17 | 77°F | 54°F | 35% | 18% | 12 h 30 min |
| September 18 | 77°F | 54°F | 34% | 18% | 12 h 20 min |
| September 19 | 77°F | 54°F | 34% | 18% | 12 h 20 min |
| September 20 | 76°F | 53°F | 34% | 18% | 12 h 20 min |
| September 21 | 76°F | 53°F | 34% | 18% | 12 h 20 min |
| September 22 | 76°F | 53°F | 34% | 18% | 12 h 10 min |
| September 23 | 75°F | 52°F | 34% | 18% | 12 h 10 min |
| September 24 | 75°F | 52°F | 34% | 18% | 12 h 10 min |
| September 25 | 75°F | 51°F | 34% | 19% | 12 h 10 min |
| September 26 | 74°F | 51°F | 34% | 19% | 12 h |
| September 27 | 74°F | 51°F | 35% | 19% | 12 h |
| September 28 | 73°F | 50°F | 35% | 19% | 12 h |
| September 29 | 73°F | 50°F | 35% | 19% | 11 h 50 min |
| September 30 | 73°F | 50°F | 35% | 19% | 11 h 50 min |
- Normal high
- 78°FSeptember average
- Normal low
- 55°FSeptember average
- Precipitation
- 2.51 inmonth total
- Days with precipitation
- 100.01 inch or more
- Days at 90°F or more
- 2
- 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
- 79%of clear-sky sunlight (NASA)
Source: NOAA NCEI 1991-2020 daily normals, station USW00004846; monthly normals. Daylight is computed from the place's latitude with NOAA's solar equations.
Does it rain in Valparaiso in September?
On a given September day the chance of 0.01 inch or more is 35% on average, highest around September 1 (36%). In all, 2.51 in falls on 10 days of a normal September.
In a normal September in Valparaiso, 2 days reach 90°F.
Source: NOAA NCEI 1991-2020 daily and monthly normals, station USW00004846.
What are the records for September in Valparaiso?
The warmest September temperature on this station's record (since 1997) is 97°F, on September 11, 2013; the coldest is 36°F, on September 24, 2012. The wettest September brought 6.35 in (2019).
The September mean against the 1991-2020 normal of 66.2°F: 2021 69.0°F (+2.8), 2022 64.7°F (−1.5), 2023 65.0°F (−1.2), 2024 67.1°F (+0.9), 2025 67.5°F (+1.3), 2026 68.3°F (+2.1). 4 of 6 ran warmer than normal.
| September | Mean | Against normal | Precip. |
|---|---|---|---|
| 2021 | 69.0°F | +2.8°F | 1.03 in |
| 2022 | 64.7°F | −1.5°F | 1.06 in |
| 2023 | 65.0°F | −1.2°F | 2.15 in |
| 2024 | 67.1°F | +0.9°F | 1.87 in |
| 2025 | 67.5°F | +1.3°F | 1.49 in |
| 2026 | 68.3°F | +2.1°F | 4.23 in |
Source: records: ACIS, station USW00004846; recent months: ACIS, station USW00004846. Records and recent months use complete months only.
How does September in Valparaiso compare across Indiana?
Across the 99 places PlainClimate covers in Indiana, September normal highs run from 74°F in Angola to 82°F in English; Valparaiso's is 78°F.
Source: NOAA NCEI 1991-2020 monthly normals for every station in the state.