Rexburg weather in August: Rexburg, Idaho: normal highs, lows, rain and records for August
Rexburg in August has a normal high of 84°F and a normal low of 50°F, a daily mean of 67°F, falling from 87°F on the 1st to 80°F by the 31st. Measurable precipitation falls on 5 days in a normal August, 0.75 inches in all. (NOAA 1991-2020 normals)
In metric: a normal high of 29°C and low of 10°C, 19 mm of precipitation in August.
- NOAA stationRexburg Madison County Airport
- Station IDUSW00094194
- Location43.83°N 111.80°W
- Elevation4,858 ft (1,481 m)
- From the center1 miles
- Population40,695
- Jan 28° 13°
- Feb 32° 16°
- Mar 45° 25°
- Apr 56° 32°
- May 66° 40°
- Jun 74° 46°
- Jul 85° 52°
- Aug 84° 50°
- Sep 73° 42°
- Oct 57° 32°
- Nov 41° 23°
- Dec 29° 14°
Each month: normal high (large) and low, °F. Fill: the month's normal mean, colder blue to hotter red.
How warm is Rexburg in August?
The normal high is 84°F and the normal low 50°F, for a daily mean of 66.9°F. August is 1.3°F cooler than July and 9.5°F warmer than September. August is the 2nd warmest month of the year in Rexburg and the 9th wettest. Across the month the normal high falls 7°F, from 87°F on August 1 to 80°F on August 31. From one year to the next August's mean temperature typically moves about 1.9°F either way (NOAA's standard deviation), so roughly two Augusts in three average between 65°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 15%).
| Day | High | Low | Chance of 0.01 in | Chance of 0.10 in |
|---|---|---|---|---|
| August 1 | 87°F | 53°F | 14% | 4% |
| August 8 | 86°F | 52°F | 14% | 5% |
| August 15 | 85°F | 50°F | 14% | 5% |
| August 22 | 83°F | 48°F | 14% | 5% |
| August 31 | 80°F | 46°F | 15% | 7% |
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 | 87°F | 53°F | 14% | 4% | 14 h 40 min |
| August 2 | 87°F | 53°F | 14% | 4% | 14 h 40 min |
| August 3 | 87°F | 53°F | 14% | 4% | 14 h 30 min |
| August 4 | 87°F | 52°F | 14% | 4% | 14 h 30 min |
| August 5 | 87°F | 52°F | 14% | 5% | 14 h 30 min |
| August 6 | 87°F | 52°F | 14% | 5% | 14 h 30 min |
| August 7 | 87°F | 52°F | 14% | 5% | 14 h 20 min |
| August 8 | 86°F | 52°F | 14% | 5% | 14 h 20 min |
| August 9 | 86°F | 52°F | 14% | 5% | 14 h 20 min |
| August 10 | 86°F | 51°F | 14% | 5% | 14 h 20 min |
| August 11 | 86°F | 51°F | 14% | 5% | 14 h 10 min |
| August 12 | 86°F | 51°F | 14% | 5% | 14 h 10 min |
| August 13 | 85°F | 51°F | 14% | 5% | 14 h 10 min |
| August 14 | 85°F | 50°F | 14% | 5% | 14 h 10 min |
| August 15 | 85°F | 50°F | 14% | 5% | 14 h |
| August 16 | 85°F | 50°F | 14% | 5% | 14 h |
| August 17 | 84°F | 50°F | 14% | 5% | 14 h |
| August 18 | 84°F | 49°F | 14% | 5% | 14 h |
| August 19 | 84°F | 49°F | 14% | 5% | 13 h 50 min |
| August 20 | 83°F | 49°F | 14% | 5% | 13 h 50 min |
| August 21 | 83°F | 49°F | 14% | 5% | 13 h 50 min |
| August 22 | 83°F | 48°F | 14% | 5% | 13 h 40 min |
| August 23 | 83°F | 48°F | 14% | 6% | 13 h 40 min |
| August 24 | 82°F | 48°F | 14% | 6% | 13 h 40 min |
| August 25 | 82°F | 48°F | 15% | 6% | 13 h 40 min |
| August 26 | 82°F | 47°F | 15% | 6% | 13 h 30 min |
| August 27 | 81°F | 47°F | 15% | 6% | 13 h 30 min |
| August 28 | 81°F | 47°F | 15% | 6% | 13 h 30 min |
| August 29 | 81°F | 46°F | 15% | 6% | 13 h 20 min |
| August 30 | 80°F | 46°F | 15% | 7% | 13 h 20 min |
| August 31 | 80°F | 46°F | 15% | 7% | 13 h 20 min |
- Normal high
- 84°FAugust average
- Normal low
- 50°FAugust average
- Precipitation
- 0.75 inmonth total
- Days with precipitation
- 50.01 inch or more
- Days at 90°F or more
- 8
- Daylight
- 14 h 40 min to 13 h 20 minAugust 1 to August 31
- Days at 70°F or more
- 30
- Days at 80°F or more
- 25
- Sunshine
- 87%of clear-sky sunlight (NASA)
Source: NOAA NCEI 1991-2020 daily normals, station USW00094194; monthly normals. Daylight is computed from the place's latitude with NOAA's solar equations.
Does it rain in Rexburg in August?
On a given August day the chance of 0.01 inch or more is 14% on average, highest around August 31 (15%). In all, 0.75 in falls on 5 days of a normal August.
In a normal August in Rexburg, 8 days reach 90°F.
Source: NOAA NCEI 1991-2020 daily and monthly normals, station USW00094194.
What are the records for August in Rexburg?
The warmest August temperature on this station's record (since 1998) is 100°F, on August 1, 2026; the coldest is 33°F, on August 31, 2006. The wettest August brought 4.18 in (2014).
The August mean against the 1991-2020 normal of 66.9°F: 2021 66.0°F (−0.9), 2022 72.7°F (+5.8), 2023 69.7°F (+2.8), 2024 67.1°F (+0.2), 2025 69.0°F (+2.1), 2026 69.9°F (+3.0). 5 of 6 ran warmer than normal.
| August | Mean | Against normal | Precip. |
|---|---|---|---|
| 2021 | 66.0°F | −0.9°F | 2.17 in |
| 2022 | 72.7°F | +5.8°F | 0.47 in |
| 2023 | 69.7°F | +2.8°F | 1.86 in |
| 2024 | 67.1°F | +0.2°F | 0.70 in |
| 2025 | 69.0°F | +2.1°F | 0.80 in |
| 2026 | 69.9°F | +3.0°F | 1.30 in |
Source: records: ACIS, station USW00094194; recent months: ACIS, station USW00094194. Records and recent months use complete months only.
How does August in Rexburg 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; Rexburg's is 84°F.
Source: NOAA NCEI 1991-2020 monthly normals for every station in the state.