South Bend weather in August: South Bend, Indiana: normal highs, lows, rain and records for August
South Bend in August has a normal high of 81°F and a normal low of 61°F, a daily mean of 71°F, falling from 82°F on the 1st to 79°F by the 31st. Measurable precipitation falls on 10 days in a normal August, 4.01 inches in all. (NOAA 1991-2020 normals)
In metric: a normal high of 27°C and low of 16°C, 102 mm of precipitation in August.
- NOAA stationSouth Bend Airport
- Station IDUSW00014848
- Location41.71°N 86.32°W
- Elevation773 ft (236 m)
- From the center3 miles
- Population103,713
- Jan 31° 17°
- Feb 35° 19°
- Mar 46° 27°
- Apr 59° 37°
- May 70° 48°
- Jun 79° 58°
- Jul 83° 62°
- Aug 81° 61°
- Sep 74° 53°
- Oct 62° 42°
- Nov 48° 32°
- Dec 36° 23°
Each month: normal high (large) and low, °F. Fill: the month's normal mean, colder blue to hotter red.
How warm is South Bend in August?
The normal high is 81°F and the normal low 61°F, for a daily mean of 70.7°F. August is 1.7°F cooler than July and 7.0°F warmer than September. August is the 2nd warmest month of the year in South Bend and the 3rd wettest. Across the month the normal high falls 3°F, from 82°F on August 1 to 79°F on August 31. From one year to the next August's mean temperature typically moves about 2.4°F either way (NOAA's standard deviation), so roughly two Augusts in three average between 68°F and 73°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 32%).
| Day | High | Low | Chance of 0.01 in | Chance of 0.10 in |
|---|---|---|---|---|
| August 1 | 82°F | 62°F | 32% | 21% |
| August 8 | 82°F | 61°F | 32% | 21% |
| August 15 | 81°F | 61°F | 32% | 21% |
| August 22 | 80°F | 60°F | 32% | 20% |
| August 31 | 79°F | 58°F | 32% | 19% |
Every day of August: normal high, low and chance of precipitation (warmest afternoon August 1, coldest night August 31)
| Day | High | Low | Chance of 0.01 in | Chance of 0.10 in | Daylight |
|---|---|---|---|---|---|
| August 1 | 82°F | 62°F | 32% | 21% | 14 h 30 min |
| August 2 | 82°F | 62°F | 32% | 21% | 14 h 20 min |
| August 3 | 82°F | 62°F | 32% | 21% | 14 h 20 min |
| August 4 | 82°F | 62°F | 32% | 21% | 14 h 20 min |
| August 5 | 82°F | 62°F | 32% | 21% | 14 h 20 min |
| August 6 | 82°F | 62°F | 32% | 21% | 14 h 20 min |
| August 7 | 82°F | 62°F | 32% | 21% | 14 h 10 min |
| August 8 | 82°F | 61°F | 32% | 21% | 14 h 10 min |
| August 9 | 82°F | 61°F | 32% | 21% | 14 h 10 min |
| August 10 | 81°F | 61°F | 32% | 21% | 14 h 10 min |
| August 11 | 81°F | 61°F | 32% | 21% | 14 h |
| August 12 | 81°F | 61°F | 32% | 21% | 14 h |
| August 13 | 81°F | 61°F | 32% | 21% | 14 h |
| August 14 | 81°F | 61°F | 32% | 21% | 14 h |
| August 15 | 81°F | 61°F | 32% | 21% | 13 h 50 min |
| August 16 | 81°F | 61°F | 32% | 21% | 13 h 50 min |
| August 17 | 81°F | 61°F | 32% | 21% | 13 h 50 min |
| August 18 | 81°F | 61°F | 32% | 21% | 13 h 50 min |
| August 19 | 81°F | 61°F | 32% | 20% | 13 h 40 min |
| August 20 | 81°F | 60°F | 32% | 20% | 13 h 40 min |
| August 21 | 81°F | 60°F | 32% | 20% | 13 h 40 min |
| August 22 | 80°F | 60°F | 32% | 20% | 13 h 40 min |
| August 23 | 80°F | 60°F | 32% | 20% | 13 h 30 min |
| August 24 | 80°F | 60°F | 32% | 20% | 13 h 30 min |
| August 25 | 80°F | 60°F | 32% | 20% | 13 h 30 min |
| August 26 | 80°F | 59°F | 32% | 20% | 13 h 30 min |
| August 27 | 80°F | 59°F | 32% | 20% | 13 h 20 min |
| August 28 | 80°F | 59°F | 32% | 20% | 13 h 20 min |
| August 29 | 79°F | 59°F | 32% | 20% | 13 h 20 min |
| August 30 | 79°F | 59°F | 32% | 20% | 13 h 20 min |
| August 31 | 79°F | 58°F | 32% | 19% | 13 h 10 min |
- Normal high
- 81°FAugust average
- Normal low
- 61°FAugust average
- Precipitation
- 4.01 inmonth total
- Days with precipitation
- 100.01 inch or more
- Days at 90°F or more
- 3
- Daylight
- 14 h 30 min to 13 h 10 minAugust 1 to August 31
- Days at 70°F or more
- 30
- Days at 80°F or more
- 20
- Sunshine
- 79%of clear-sky sunlight (NASA)
Source: NOAA NCEI 1991-2020 daily normals, station USW00014848; monthly normals. Daylight is computed from the place's latitude with NOAA's solar equations.
Does it rain in South Bend in August?
On a given August day the chance of 0.01 inch or more is 32% on average, highest around August 4 (32%). In all, 4.01 in falls on 10 days of a normal August, 1 of them with an inch or more.
In a normal August in South Bend, 3 days reach 90°F.
Source: NOAA NCEI 1991-2020 daily and monthly normals, station USW00014848.
How humid and windy is South Bend in August?
At 3 p.m. the normal temperature is 78°F with 54% relative humidity and a dew point of 60°F; at 6 a.m. it is 62°F with 89% humidity. The wind averages 6.6 mph, most often from the west in the afternoon.
| Time | Temperature | Dew point | Humidity | Wind | Clear or few clouds |
|---|---|---|---|---|---|
| 6 a.m. | 62°F | 59°F | 89% | 4.6 mph | 71% |
| 9 a.m. | 69°F | 61°F | 75% | 7.4 mph | 65% |
| noon | 76°F | 61°F | 59% | 8.8 mph | 57% |
| 3 p.m. | 78°F | 60°F | 54% | 9.7 mph | 54% |
| 6 p.m. | 76°F | 60°F | 58% | 8.6 mph | 71% |
| 9 p.m. | 69°F | 61°F | 77% | 5.1 mph | 75% |
Source: NOAA NCEI 1991-2020 hourly normals, station USW00014848. Hourly normals exist only for NOAA's first-order stations; a dash where NOAA publishes no value for that hour (the sky at some hours).
What are the records for August in South Bend?
The warmest August temperature on South Bend's official record (since 1893) is 105°F, on August 9, 1934; the coldest is 40°F, on August 31, 1911. The wettest August brought 12.81 in (2016).
The August mean against the 1991-2020 normal of 70.7°F: 2021 75.6°F (+4.9), 2022 73.2°F (+2.5), 2023 71.5°F (+0.8), 2024 73.1°F (+2.4), 2025 70.7°F (at normal), 2026 71.7°F (+1.0). 5 of 6 ran warmer than normal.
| August | Mean | Against normal | Precip. |
|---|---|---|---|
| 2021 | 75.6°F | +4.9°F | 5.50 in |
| 2022 | 73.2°F | +2.5°F | 2.03 in |
| 2023 | 71.5°F | +0.8°F | 2.11 in |
| 2024 | 73.1°F | +2.4°F | 2.21 in |
| 2025 | 70.7°F | at normal | 3.62 in |
| 2026 | 71.7°F | +1.0°F | 4.11 in |
Source: records: ACIS, NWS threaded record SBNthr; recent months: ACIS, station USW00014848. Records and recent months use complete months only.
How does August in South Bend compare across Indiana?
Across the 99 places PlainClimate covers in Indiana, August normal highs run from 80°F in Angola to 88°F in English; South Bend's is 81°F.
Source: NOAA NCEI 1991-2020 monthly normals for every station in the state.