Rolla weather in August: Rolla, Missouri: normal highs, lows, rain and records for August
Rolla in August has a normal high of 88°F and a normal low of 67°F, a daily mean of 78°F, falling from 90°F on the 1st to 85°F by the 31st. Measurable precipitation falls on 9 days in a normal August, 4.52 inches in all. (NOAA 1991-2020 normals)
In metric: a normal high of 31°C and low of 19°C, 115 mm of precipitation in August.
- NOAA stationRolla Missouri S&t
- Station IDUSC00237263
- Location37.96°N 91.78°W
- Elevation1,173 ft (358 m)
- From the center1 miles
- Population20,660
- Jan 41° 22°
- Feb 46° 26°
- Mar 56° 35°
- Apr 67° 45°
- May 76° 56°
- Jun 84° 65°
- Jul 89° 69°
- Aug 88° 67°
- Sep 80° 59°
- Oct 69° 47°
- Nov 56° 36°
- Dec 45° 27°
Each month: normal high (large) and low, °F. Fill: the month's normal mean, colder blue to hotter red.
How warm is Rolla in August?
The normal high is 88°F and the normal low 67°F, for a daily mean of 77.6°F. August is 1.2°F cooler than July and 8.0°F warmer than September. August is the 2nd warmest month of the year in Rolla and the 4th wettest. Across the month the normal high falls 5°F, from 90°F on August 1 to 85°F on August 31. From one year to the next August's mean temperature typically moves about 2.9°F either way (NOAA's standard deviation), so roughly two Augusts in three average between 75°F and 81°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 30%).
| Day | High | Low | Chance of 0.01 in | Chance of 0.10 in |
|---|---|---|---|---|
| August 1 | 90°F | 69°F | 29% | 19% |
| August 8 | 89°F | 68°F | 30% | 19% |
| August 15 | 89°F | 68°F | 30% | 19% |
| August 22 | 87°F | 66°F | 29% | 18% |
| August 31 | 85°F | 64°F | 29% | 18% |
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 | 69°F | 29% | 19% | 14 h 10 min |
| August 2 | 90°F | 69°F | 29% | 19% | 14 h 10 min |
| August 3 | 90°F | 69°F | 29% | 19% | 14 h |
| August 4 | 90°F | 69°F | 30% | 19% | 14 h |
| August 5 | 90°F | 69°F | 30% | 19% | 14 h |
| August 6 | 89°F | 68°F | 30% | 19% | 14 h |
| August 7 | 89°F | 68°F | 30% | 19% | 14 h |
| August 8 | 89°F | 68°F | 30% | 19% | 14 h |
| August 9 | 89°F | 68°F | 30% | 19% | 13 h 50 min |
| August 10 | 89°F | 68°F | 30% | 19% | 13 h 50 min |
| August 11 | 89°F | 68°F | 30% | 19% | 13 h 50 min |
| August 12 | 89°F | 68°F | 30% | 19% | 13 h 50 min |
| August 13 | 89°F | 68°F | 30% | 19% | 13 h 40 min |
| August 14 | 89°F | 68°F | 30% | 19% | 13 h 40 min |
| August 15 | 89°F | 68°F | 30% | 19% | 13 h 40 min |
| August 16 | 89°F | 67°F | 30% | 19% | 13 h 40 min |
| August 17 | 88°F | 67°F | 30% | 19% | 13 h 40 min |
| August 18 | 88°F | 67°F | 29% | 19% | 13 h 30 min |
| August 19 | 88°F | 67°F | 29% | 19% | 13 h 30 min |
| August 20 | 88°F | 67°F | 29% | 19% | 13 h 30 min |
| August 21 | 88°F | 67°F | 29% | 18% | 13 h 30 min |
| August 22 | 87°F | 66°F | 29% | 18% | 13 h 30 min |
| August 23 | 87°F | 66°F | 29% | 18% | 13 h 20 min |
| August 24 | 87°F | 66°F | 29% | 18% | 13 h 20 min |
| August 25 | 87°F | 66°F | 29% | 18% | 13 h 20 min |
| August 26 | 87°F | 66°F | 29% | 18% | 13 h 20 min |
| August 27 | 86°F | 65°F | 29% | 18% | 13 h 10 min |
| August 28 | 86°F | 65°F | 29% | 18% | 13 h 10 min |
| August 29 | 86°F | 65°F | 29% | 18% | 13 h 10 min |
| August 30 | 86°F | 65°F | 29% | 18% | 13 h 10 min |
| August 31 | 85°F | 64°F | 29% | 18% | 13 h |
- Normal high
- 88°FAugust average
- Normal low
- 67°FAugust average
- Precipitation
- 4.52 inmonth total
- Days with precipitation
- 90.01 inch or more
- Days at 90°F or more
- 14
- Daylight
- 14 h 10 min to 13 hAugust 1 to August 31
- Days at 70°F or more
- 31
- Days at 80°F or more
- 28
- Sunshine
- 80%of clear-sky sunlight (NASA)
Source: NOAA NCEI 1991-2020 daily normals, station USC00237263; monthly normals. Daylight is computed from the place's latitude with NOAA's solar equations.
Does it rain in Rolla in August?
On a given August day the chance of 0.01 inch or more is 29% on average, highest around August 7 (30%). In all, 4.52 in falls on 9 days of a normal August, 2 of them with an inch or more.
In a normal August in Rolla, 14 days reach 90°F.
Source: NOAA NCEI 1991-2020 daily and monthly normals, station USC00237263.
What are the records for August in Rolla?
The warmest August temperature on this station's record (since 1897) is 108°F, on August 8, 1934; the coldest is 42°F, on August 31, 1915. The wettest August brought 12.29 in (1915).
The August mean against the 1991-2020 normal of 77.6°F: 2021 78.5°F (+0.9), 2022 77.8°F (+0.2), 2023 77.3°F (−0.3), 2024 76.8°F (−0.8), 2025 77.2°F (−0.4), 2026 78.8°F (+1.3). 3 of 6 ran warmer than normal.
| August | Mean | Against normal | Precip. |
|---|---|---|---|
| 2021 | 78.5°F | +0.9°F | 2.62 in |
| 2022 | 77.8°F | +0.2°F | 5.95 in |
| 2023 | 77.3°F | −0.3°F | 5.69 in |
| 2024 | 76.8°F | −0.8°F | 3.69 in |
| 2025 | 77.2°F | −0.4°F | 1.89 in |
| 2026 | 78.8°F | +1.3°F | 5.33 in |
Source: records: ACIS, station USC00237263; recent months: ACIS, station USC00237263. Records and recent months use complete months only.
How does August in Rolla compare across Missouri?
Across the 134 places PlainClimate covers in Missouri, August normal highs run from 83°F in Canton to 91°F in Malden; Rolla's is 88°F.
Source: NOAA NCEI 1991-2020 monthly normals for every station in the state.