Lafayette weather in August: Lafayette, Indiana: normal highs, lows, rain and records for August
Lafayette in August has a normal high of 83°F and a normal low of 62°F, a daily mean of 72°F, falling from 83°F on the 1st to 81°F by the 31st. Measurable precipitation falls on 10 days in a normal August, 3.12 inches in all. (NOAA 1991-2020 normals)
In metric: a normal high of 28°C and low of 17°C, 79 mm of precipitation in August.
- NOAA stationLafayette Purdue University Airport
- Station IDUSW00014835
- Location40.41°N 86.94°W
- Elevation599 ft (183 m)
- Population71,757
- Jan 33° 18°
- Feb 38° 21°
- Mar 50° 30°
- Apr 62° 40°
- May 73° 51°
- Jun 81° 60°
- Jul 84° 63°
- Aug 83° 62°
- Sep 77° 54°
- Oct 65° 43°
- Nov 50° 33°
- Dec 38° 24°
Each month: normal high (large) and low, °F. Fill: the month's normal mean, colder blue to hotter red.
How warm is Lafayette in August?
The normal high is 83°F and the normal low 62°F, for a daily mean of 72.2°F. August is 1.4°F cooler than July and 6.7°F warmer than September. August is the 2nd warmest month of the year in Lafayette and the 5th wettest. Across the month the normal high falls 2°F, from 83°F on August 1 to 81°F on August 31. From one year to the next August's mean temperature typically moves about 2.6°F either way (NOAA's standard deviation), so roughly two Augusts in three average between 70°F and 75°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 37%).
| Day | High | Low | Chance of 0.01 in | Chance of 0.10 in |
|---|---|---|---|---|
| August 1 | 83°F | 63°F | 37% | 20% |
| August 8 | 83°F | 63°F | 36% | 19% |
| August 15 | 83°F | 62°F | 35% | 18% |
| August 22 | 83°F | 61°F | 34% | 18% |
| August 31 | 81°F | 59°F | 32% | 17% |
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 | 83°F | 63°F | 37% | 20% | 14 h 20 min |
| August 2 | 83°F | 63°F | 37% | 20% | 14 h 20 min |
| August 3 | 83°F | 63°F | 37% | 20% | 14 h 20 min |
| August 4 | 83°F | 63°F | 37% | 20% | 14 h 10 min |
| August 5 | 83°F | 63°F | 36% | 20% | 14 h 10 min |
| August 6 | 83°F | 63°F | 36% | 19% | 14 h 10 min |
| August 7 | 83°F | 63°F | 36% | 19% | 14 h 10 min |
| August 8 | 83°F | 63°F | 36% | 19% | 14 h 10 min |
| August 9 | 83°F | 63°F | 36% | 19% | 14 h |
| August 10 | 83°F | 63°F | 36% | 19% | 14 h |
| August 11 | 83°F | 63°F | 36% | 19% | 14 h |
| August 12 | 83°F | 62°F | 35% | 19% | 14 h |
| August 13 | 83°F | 62°F | 35% | 19% | 13 h 50 min |
| August 14 | 83°F | 62°F | 35% | 18% | 13 h 50 min |
| August 15 | 83°F | 62°F | 35% | 18% | 13 h 50 min |
| August 16 | 83°F | 62°F | 35% | 18% | 13 h 50 min |
| August 17 | 83°F | 62°F | 35% | 18% | 13 h 40 min |
| August 18 | 83°F | 62°F | 35% | 18% | 13 h 40 min |
| August 19 | 83°F | 62°F | 34% | 18% | 13 h 40 min |
| August 20 | 83°F | 62°F | 34% | 18% | 13 h 40 min |
| August 21 | 83°F | 61°F | 34% | 18% | 13 h 40 min |
| August 22 | 83°F | 61°F | 34% | 18% | 13 h 30 min |
| August 23 | 82°F | 61°F | 34% | 18% | 13 h 30 min |
| August 24 | 82°F | 61°F | 33% | 17% | 13 h 30 min |
| August 25 | 82°F | 61°F | 33% | 17% | 13 h 30 min |
| August 26 | 82°F | 60°F | 33% | 17% | 13 h 20 min |
| August 27 | 82°F | 60°F | 33% | 17% | 13 h 20 min |
| August 28 | 82°F | 60°F | 33% | 17% | 13 h 20 min |
| August 29 | 82°F | 60°F | 33% | 17% | 13 h 20 min |
| August 30 | 82°F | 59°F | 33% | 17% | 13 h 10 min |
| August 31 | 81°F | 59°F | 32% | 17% | 13 h 10 min |
- Normal high
- 83°FAugust average
- Normal low
- 62°FAugust average
- Precipitation
- 3.12 inmonth total
- Days with precipitation
- 100.01 inch or more
- Days at 90°F or more
- 5
- Daylight
- 14 h 20 min to 13 h 10 minAugust 1 to August 31
- Days at 70°F or more
- 31
- Days at 80°F or more
- 24
- Sunshine
- 81%of clear-sky sunlight (NASA)
Source: NOAA NCEI 1991-2020 daily normals, station USW00014835; monthly normals. Daylight is computed from the place's latitude with NOAA's solar equations.
Does it rain in Lafayette in August?
On a given August day the chance of 0.01 inch or more is 35% on average, highest around August 1 (37%). In all, 3.12 in falls on 10 days of a normal August, 1 of them with an inch or more.
In a normal August in Lafayette, 5 days reach 90°F.
Source: NOAA NCEI 1991-2020 daily and monthly normals, station USW00014835.
How humid and windy is Lafayette in August?
At 3 p.m. the normal temperature is 82°F with 52% relative humidity and a dew point of 62°F; at 6 a.m. it is 63°F with 91% humidity. The wind averages 5.7 mph, most often from the west-southwest in the afternoon.
| Time | Temperature | Dew point | Humidity | Wind | Clear or few clouds |
|---|---|---|---|---|---|
| 6 a.m. | 63°F | 60°F | 91% | 3.3 mph | 70% |
| 9 a.m. | 70°F | 63°F | 77% | 5.8 mph | 73% |
| noon | 79°F | 63°F | 58% | 8.2 mph | 64% |
| 3 p.m. | 82°F | 62°F | 52% | 8.9 mph | 57% |
| 6 p.m. | 79°F | 62°F | 56% | 7.6 mph | 76% |
| 9 p.m. | 70°F | 63°F | 77% | 4.6 mph | 80% |
Source: NOAA NCEI 1991-2020 hourly normals, station USW00014835. 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 Lafayette?
The warmest August temperature on this station's record (since 1944) is 100°F, on August 20, 1983; the coldest is 37°F, on August 29, 1965. The wettest August brought 12.22 in (1981).
The August mean against the 1991-2020 normal of 72.2°F: 2021 75.5°F (+3.3), 2022 74.0°F (+1.8), 2023 71.9°F (−0.3), 2024 72.8°F (+0.6), 2025 71.9°F (−0.3), 2026 73.5°F (+1.3). 4 of 6 ran warmer than normal.
| August | Mean | Against normal | Precip. |
|---|---|---|---|
| 2021 | 75.5°F | +3.3°F | 2.62 in |
| 2022 | 74.0°F | +1.8°F | 3.60 in |
| 2023 | 71.9°F | −0.3°F | 3.54 in |
| 2024 | 72.8°F | +0.6°F | 2.59 in |
| 2025 | 71.9°F | −0.3°F | 1.85 in |
| 2026 | 73.5°F | +1.3°F | 4.02 in |
Source: records: ACIS, station USW00014835; recent months: ACIS, station USW00014835. Records and recent months use complete months only.
How does August in Lafayette 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; Lafayette's is 83°F.
Source: NOAA NCEI 1991-2020 monthly normals for every station in the state.