Joplin weather in August: Joplin, Missouri: normal highs, lows, rain and records for August
Joplin in August has a normal high of 90°F and a normal low of 68°F, a daily mean of 79°F, falling from 91°F on the 1st to 87°F by the 31st. Measurable precipitation falls on 8 days in a normal August, 3.36 inches in all. (NOAA 1991-2020 normals)
In metric: a normal high of 32°C and low of 20°C, 85 mm of precipitation in August.
- NOAA stationJoplin Regional Airport
- Station IDUSW00013987
- Location37.15°N 94.50°W
- Elevation980 ft (299 m)
- Population53,605
- Jan 45° 25°
- Feb 50° 29°
- Mar 60° 37°
- Apr 69° 47°
- May 77° 56°
- Jun 86° 65°
- Jul 90° 70°
- Aug 90° 68°
- Sep 82° 59°
- Oct 71° 48°
- Nov 58° 37°
- Dec 48° 29°
Each month: normal high (large) and low, °F. Fill: the month's normal mean, colder blue to hotter red.
How warm is Joplin in August?
The normal high is 90°F and the normal low 68°F, for a daily mean of 79.0°F. August is 0.9°F cooler than July and 8.3°F warmer than September. August is the 2nd warmest month of the year in Joplin and the 7th wettest. Across the month the normal high falls 4°F, from 91°F on August 1 to 87°F on August 31. From one year to the next August's mean temperature typically moves about 3.1°F either way (NOAA's standard deviation), so roughly two Augusts in three average between 76°F and 82°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 26%).
| Day | High | Low | Chance of 0.01 in | Chance of 0.10 in |
|---|---|---|---|---|
| August 1 | 91°F | 70°F | 26% | 17% |
| August 8 | 91°F | 69°F | 26% | 17% |
| August 15 | 91°F | 68°F | 25% | 16% |
| August 22 | 90°F | 67°F | 25% | 16% |
| August 31 | 87°F | 65°F | 25% | 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 | 91°F | 70°F | 26% | 17% | 14 h |
| August 2 | 91°F | 70°F | 26% | 17% | 14 h |
| August 3 | 91°F | 70°F | 26% | 17% | 14 h |
| August 4 | 91°F | 69°F | 26% | 17% | 14 h |
| August 5 | 91°F | 69°F | 26% | 17% | 14 h |
| August 6 | 91°F | 69°F | 26% | 17% | 14 h |
| August 7 | 91°F | 69°F | 26% | 17% | 13 h 50 min |
| August 8 | 91°F | 69°F | 26% | 17% | 13 h 50 min |
| August 9 | 91°F | 69°F | 26% | 16% | 13 h 50 min |
| August 10 | 91°F | 69°F | 26% | 16% | 13 h 50 min |
| August 11 | 91°F | 69°F | 25% | 16% | 13 h 50 min |
| August 12 | 91°F | 69°F | 25% | 16% | 13 h 40 min |
| August 13 | 91°F | 69°F | 25% | 16% | 13 h 40 min |
| August 14 | 91°F | 69°F | 25% | 16% | 13 h 40 min |
| August 15 | 91°F | 68°F | 25% | 16% | 13 h 40 min |
| August 16 | 90°F | 68°F | 25% | 16% | 13 h 40 min |
| August 17 | 90°F | 68°F | 25% | 16% | 13 h 30 min |
| August 18 | 90°F | 68°F | 25% | 16% | 13 h 30 min |
| August 19 | 90°F | 68°F | 25% | 16% | 13 h 30 min |
| August 20 | 90°F | 68°F | 25% | 16% | 13 h 30 min |
| August 21 | 90°F | 67°F | 25% | 16% | 13 h 30 min |
| August 22 | 90°F | 67°F | 25% | 16% | 13 h 20 min |
| August 23 | 89°F | 67°F | 25% | 16% | 13 h 20 min |
| August 24 | 89°F | 67°F | 24% | 16% | 13 h 20 min |
| August 25 | 89°F | 67°F | 24% | 16% | 13 h 20 min |
| August 26 | 89°F | 66°F | 24% | 16% | 13 h 10 min |
| August 27 | 88°F | 66°F | 24% | 16% | 13 h 10 min |
| August 28 | 88°F | 66°F | 25% | 16% | 13 h 10 min |
| August 29 | 88°F | 66°F | 25% | 16% | 13 h 10 min |
| August 30 | 88°F | 65°F | 25% | 17% | 13 h 10 min |
| August 31 | 87°F | 65°F | 25% | 17% | 13 h |
- Normal high
- 90°FAugust average
- Normal low
- 68°FAugust average
- Precipitation
- 3.36 inmonth total
- Days with precipitation
- 80.01 inch or more
- Days at 90°F or more
- 17
- Daylight
- 14 h to 13 hAugust 1 to August 31
- Days at 70°F or more
- 31
- Days at 80°F or more
- 29
- Sunshine
- 82%of clear-sky sunlight (NASA)
Source: NOAA NCEI 1991-2020 daily normals, station USW00013987; monthly normals. Daylight is computed from the place's latitude with NOAA's solar equations.
Does it rain in Joplin in August?
On a given August day the chance of 0.01 inch or more is 25% on average, highest around August 1 (26%). In all, 3.36 in falls on 8 days of a normal August, 1 of them with an inch or more.
In a normal August in Joplin, 17 days reach 90°F.
Source: NOAA NCEI 1991-2020 daily and monthly normals, station USW00013987.
How humid and windy is Joplin in August?
At 3 p.m. the normal temperature is 87°F with 46% relative humidity and a dew point of 64°F; at 6 a.m. it is 68°F with 86% humidity. The wind averages 7.4 mph, most often from the south-southeast in the afternoon.
| Time | Temperature | Dew point | Humidity | Wind | Clear or few clouds |
|---|---|---|---|---|---|
| 6 a.m. | 68°F | 64°F | 86% | 5.7 mph | 74% |
| 9 a.m. | 77°F | 66°F | 67% | 8.9 mph | 73% |
| noon | 84°F | 65°F | 52% | 9.0 mph | 65% |
| 3 p.m. | 87°F | 64°F | 46% | 9.2 mph | 68% |
| 6 p.m. | 83°F | 65°F | 54% | 7.7 mph | 78% |
| 9 p.m. | 74°F | 65°F | 73% | 6.2 mph | 82% |
Source: NOAA NCEI 1991-2020 hourly normals, station USW00013987. 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 Joplin?
The warmest August temperature on this station's record (since 1902) is 110°F, on August 2, 2011; the coldest is 46°F, on August 21, 1950. The wettest August brought 9.04 in (1940).
The August mean against the 1991-2020 normal of 79.0°F: 2021 80.5°F (+1.5), 2022 81.4°F (+2.4), 2023 80.9°F (+1.9), 2024 79.9°F (+0.9), 2025 77.8°F (−1.2), 2026 83.9°F (+4.9). 5 of 6 ran warmer than normal.
| August | Mean | Against normal | Precip. |
|---|---|---|---|
| 2021 | 80.5°F | +1.5°F | 2.13 in |
| 2022 | 81.4°F | +2.4°F | 4.87 in |
| 2023 | 80.9°F | +1.9°F | 3.85 in |
| 2024 | 79.9°F | +0.9°F | 1.58 in |
| 2025 | 77.8°F | −1.2°F | 2.64 in |
| 2026 | 83.9°F | +4.9°F | 1.32 in |
Source: records: ACIS, station USW00013987; recent months: ACIS, station USW00013987. Records and recent months use complete months only.
How does August in Joplin 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; Joplin's is 90°F.
Source: NOAA NCEI 1991-2020 monthly normals for every station in the state.