Twin Falls weather in August: Twin Falls, Idaho: normal highs, lows, rain and records for August
Twin Falls in August has a normal high of 87°F and a normal low of 56°F, a daily mean of 71°F, falling from 90°F on the 1st to 83°F by the 31st. Measurable precipitation falls on 3 days in a normal August, 0.43 inches in all. (NOAA 1991-2020 normals)
In metric: a normal high of 30°C and low of 13°C, 11 mm of precipitation in August.
- NOAA stationTwin Falls Sun Valley Regional Airport
- Station IDUSW00094178
- Location42.48°N 114.49°W
- Elevation4,151 ft (1,265 m)
- Population55,589
- Jan 37° 21°
- Feb 42° 24°
- Mar 52° 30°
- Apr 59° 34°
- May 69° 42°
- Jun 78° 49°
- Jul 88° 58°
- Aug 87° 56°
- Sep 76° 47°
- Oct 62° 36°
- Nov 47° 26°
- Dec 37° 20°
Each month: normal high (large) and low, °F. Fill: the month's normal mean, colder blue to hotter red.
How warm is Twin Falls in August?
The normal high is 87°F and the normal low 56°F, for a daily mean of 71.3°F. August is 1.7°F cooler than July and 9.5°F warmer than September. August is the 2nd warmest month of the year in Twin Falls and the 11th wettest. Across the month the normal high falls 7°F, from 90°F on August 1 to 83°F on August 31. From one year to the next August's mean temperature typically moves about 2.2°F either way (NOAA's standard deviation), so roughly two Augusts in three average between 69°F and 74°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 11%).
| Day | High | Low | Chance of 0.01 in | Chance of 0.10 in |
|---|---|---|---|---|
| August 1 | 90°F | 59°F | 10% | 3% |
| August 8 | 89°F | 58°F | 10% | 3% |
| August 15 | 87°F | 56°F | 10% | 3% |
| August 22 | 85°F | 54°F | 11% | 3% |
| August 31 | 83°F | 52°F | 11% | 3% |
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 | 90°F | 59°F | 10% | 3% | 14 h 30 min |
| August 2 | 90°F | 59°F | 10% | 3% | 14 h 30 min |
| August 3 | 90°F | 59°F | 10% | 3% | 14 h 30 min |
| August 4 | 90°F | 59°F | 10% | 3% | 14 h 20 min |
| August 5 | 89°F | 59°F | 10% | 3% | 14 h 20 min |
| August 6 | 89°F | 58°F | 10% | 3% | 14 h 20 min |
| August 7 | 89°F | 58°F | 10% | 3% | 14 h 20 min |
| August 8 | 89°F | 58°F | 10% | 3% | 14 h 10 min |
| August 9 | 89°F | 58°F | 10% | 3% | 14 h 10 min |
| August 10 | 89°F | 58°F | 10% | 3% | 14 h 10 min |
| August 11 | 88°F | 57°F | 10% | 3% | 14 h 10 min |
| August 12 | 88°F | 57°F | 10% | 3% | 14 h 10 min |
| August 13 | 88°F | 57°F | 10% | 3% | 14 h |
| August 14 | 88°F | 57°F | 10% | 3% | 14 h |
| August 15 | 87°F | 56°F | 10% | 3% | 14 h |
| August 16 | 87°F | 56°F | 10% | 3% | 14 h |
| August 17 | 87°F | 56°F | 10% | 3% | 13 h 50 min |
| August 18 | 87°F | 55°F | 10% | 3% | 13 h 50 min |
| August 19 | 86°F | 55°F | 10% | 3% | 13 h 50 min |
| August 20 | 86°F | 55°F | 10% | 3% | 13 h 40 min |
| August 21 | 86°F | 55°F | 10% | 3% | 13 h 40 min |
| August 22 | 85°F | 54°F | 11% | 3% | 13 h 40 min |
| August 23 | 85°F | 54°F | 11% | 3% | 13 h 40 min |
| August 24 | 85°F | 54°F | 11% | 3% | 13 h 30 min |
| August 25 | 85°F | 53°F | 11% | 3% | 13 h 30 min |
| August 26 | 84°F | 53°F | 11% | 3% | 13 h 30 min |
| August 27 | 84°F | 53°F | 11% | 3% | 13 h 30 min |
| August 28 | 84°F | 53°F | 11% | 3% | 13 h 20 min |
| August 29 | 83°F | 52°F | 11% | 3% | 13 h 20 min |
| August 30 | 83°F | 52°F | 11% | 3% | 13 h 20 min |
| August 31 | 83°F | 52°F | 11% | 3% | 13 h 20 min |
- Normal high
- 87°FAugust average
- Normal low
- 56°FAugust average
- Precipitation
- 0.43 inmonth total
- Days with precipitation
- 30.01 inch or more
- Days at 90°F or more
- 14
- Daylight
- 14 h 30 min to 13 h 20 minAugust 1 to August 31
- Days at 70°F or more
- 31
- Days at 80°F or more
- 28
- Sunshine
- 89%of clear-sky sunlight (NASA)
Source: NOAA NCEI 1991-2020 daily normals, station USW00094178; monthly normals. Daylight is computed from the place's latitude with NOAA's solar equations.
Does it rain in Twin Falls in August?
On a given August day the chance of 0.01 inch or more is 10% on average, highest around August 30 (11%). In all, 0.43 in falls on 3 days of a normal August.
In a normal August in Twin Falls, 14 days reach 90°F.
Source: NOAA NCEI 1991-2020 daily and monthly normals, station USW00094178.
What are the records for August in Twin Falls?
The warmest August temperature on this station's record (since 1997) is 103°F, on August 2, 2024; the coldest is 38°F, on August 31, 1999. The wettest August brought 5.57 in (2014).
The August mean against the 1991-2020 normal of 71.3°F: 2021 70.6°F (−0.7), 2022 76.4°F (+5.1), 2023 72.9°F (+1.6), 2024 71.8°F (+0.5), 2025 72.8°F (+1.5), 2026 74.7°F (+3.4). 5 of 6 ran warmer than normal.
| August | Mean | Against normal | Precip. |
|---|---|---|---|
| 2021 | 70.6°F | −0.7°F | 0.76 in |
| 2022 | 76.4°F | +5.1°F | 0.17 in |
| 2023 | 72.9°F | +1.6°F | 0.86 in |
| 2024 | 71.8°F | +0.5°F | 0.72 in |
| 2025 | 72.8°F | +1.5°F | 0.48 in |
| 2026 | 74.7°F | +3.4°F | 0.15 in |
Source: records: ACIS, station USW00094178; recent months: ACIS, station USW00094178. Records and recent months use complete months only.
How does August in Twin Falls compare across Idaho?
Across the 85 places PlainClimate covers in Idaho, August normal highs run from 69°F in Mullan to 97°F in Glenns Ferry; Twin Falls's is 87°F.
Source: NOAA NCEI 1991-2020 monthly normals for every station in the state.