West Mifflin weather in August: West Mifflin, Pennsylvania: normal highs, lows, rain and records for August
West Mifflin in August has a normal high of 81°F and a normal low of 63°F, a daily mean of 72°F, falling from 83°F on the 1st to 79°F by the 31st. Measurable precipitation falls on 12 days in a normal August, 3.81 inches in all. (NOAA 1991-2020 normals)
In metric: a normal high of 27°C and low of 17°C, 97 mm of precipitation in August.
- NOAA stationPittsburgh Allegheny County Airport
- Station IDUSW00014762
- Location40.35°N 79.92°W
- Elevation1,248 ft (380 m)
- From the centerunder 1 mile
- Population18,902
- Jan 37° 22°
- Feb 40° 24°
- Mar 49° 31°
- Apr 63° 42°
- May 72° 52°
- Jun 79° 60°
- Jul 83° 64°
- Aug 81° 63°
- Sep 75° 56°
- Oct 63° 45°
- Nov 51° 35°
- Dec 41° 28°
Each month: normal high (large) and low, °F. Fill: the month's normal mean, colder blue to hotter red.
How warm is West Mifflin in August?
The normal high is 81°F and the normal low 63°F, for a daily mean of 72.1°F. August is 1.5°F cooler than July and 6.7°F warmer than September. August is the 2nd warmest month of the year in West Mifflin and the 4th wettest. Across the month the normal high falls 4°F, from 83°F on August 1 to 79°F on August 31. From one year to the next August's mean temperature typically moves about 2.3°F either way (NOAA's standard deviation), so roughly two Augusts in three average between 70°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 42%).
| Day | High | Low | Chance of 0.01 in | Chance of 0.10 in |
|---|---|---|---|---|
| August 1 | 83°F | 64°F | 42% | 26% |
| August 8 | 82°F | 64°F | 41% | 25% |
| August 15 | 82°F | 63°F | 40% | 24% |
| August 22 | 81°F | 62°F | 39% | 23% |
| August 31 | 79°F | 61°F | 37% | 21% |
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 | 64°F | 42% | 26% | 14 h 20 min |
| August 2 | 83°F | 64°F | 42% | 26% | 14 h 20 min |
| August 3 | 83°F | 64°F | 42% | 26% | 14 h 20 min |
| August 4 | 82°F | 64°F | 42% | 26% | 14 h 10 min |
| August 5 | 82°F | 64°F | 42% | 25% | 14 h 10 min |
| August 6 | 82°F | 64°F | 42% | 25% | 14 h 10 min |
| August 7 | 82°F | 64°F | 41% | 25% | 14 h 10 min |
| August 8 | 82°F | 64°F | 41% | 25% | 14 h 10 min |
| August 9 | 82°F | 64°F | 41% | 25% | 14 h |
| August 10 | 82°F | 64°F | 41% | 25% | 14 h |
| August 11 | 82°F | 64°F | 41% | 25% | 14 h |
| August 12 | 82°F | 64°F | 41% | 25% | 14 h |
| August 13 | 82°F | 63°F | 40% | 24% | 13 h 50 min |
| August 14 | 82°F | 63°F | 40% | 24% | 13 h 50 min |
| August 15 | 82°F | 63°F | 40% | 24% | 13 h 50 min |
| August 16 | 82°F | 63°F | 40% | 24% | 13 h 50 min |
| August 17 | 81°F | 63°F | 40% | 24% | 13 h 40 min |
| August 18 | 81°F | 63°F | 40% | 24% | 13 h 40 min |
| August 19 | 81°F | 63°F | 39% | 23% | 13 h 40 min |
| August 20 | 81°F | 63°F | 39% | 23% | 13 h 40 min |
| August 21 | 81°F | 62°F | 39% | 23% | 13 h 40 min |
| August 22 | 81°F | 62°F | 39% | 23% | 13 h 30 min |
| August 23 | 81°F | 62°F | 39% | 23% | 13 h 30 min |
| August 24 | 81°F | 62°F | 38% | 22% | 13 h 30 min |
| August 25 | 80°F | 62°F | 38% | 22% | 13 h 30 min |
| August 26 | 80°F | 62°F | 38% | 22% | 13 h 20 min |
| August 27 | 80°F | 61°F | 38% | 22% | 13 h 20 min |
| August 28 | 80°F | 61°F | 37% | 22% | 13 h 20 min |
| August 29 | 80°F | 61°F | 37% | 21% | 13 h 20 min |
| August 30 | 80°F | 61°F | 37% | 21% | 13 h 10 min |
| August 31 | 79°F | 61°F | 37% | 21% | 13 h 10 min |
- Normal high
- 81°FAugust average
- Normal low
- 63°FAugust average
- Precipitation
- 3.81 inmonth total
- Days with precipitation
- 120.01 inch or more
- Days at 90°F or more
- 3
- Daylight
- 14 h 20 min to 13 h 10 minAugust 1 to August 31
- Days at 70°F or more
- 30
- Days at 80°F or more
- 20
- Sunshine
- 76%of clear-sky sunlight (NASA)
Source: NOAA NCEI 1991-2020 daily normals, station USW00014762; monthly normals. Daylight is computed from the place's latitude with NOAA's solar equations.
Does it rain in West Mifflin in August?
On a given August day the chance of 0.01 inch or more is 40% on average, highest around August 1 (42%). In all, 3.81 in falls on 12 days of a normal August, 1 of them with an inch or more.
In a normal August in West Mifflin, 3 days reach 90°F.
Source: NOAA NCEI 1991-2020 daily and monthly normals, station USW00014762.
How humid and windy is West Mifflin in August?
At 3 p.m. the normal temperature is 79°F with 52% relative humidity and a dew point of 59°F; at 6 a.m. it is 63°F with 89% humidity. The wind averages 6.0 mph, most often from the southwest in the afternoon.
| Time | Temperature | Dew point | Humidity | Wind | Clear or few clouds |
|---|---|---|---|---|---|
| 6 a.m. | 63°F | 59°F | 89% | 4.9 mph | 59% |
| 9 a.m. | 69°F | 61°F | 74% | 5.9 mph | 57% |
| noon | 76°F | 60°F | 57% | 7.2 mph | 47% |
| 3 p.m. | 79°F | 59°F | 52% | 7.7 mph | 41% |
| 6 p.m. | 76°F | 59°F | 56% | 7.0 mph | 57% |
| 9 p.m. | 71°F | 60°F | 68% | 5.7 mph | 66% |
Source: NOAA NCEI 1991-2020 hourly normals, station USW00014762. 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 West Mifflin?
The warmest August temperature on this station's record (since 1935) is 99°F, on August 27, 1948; the coldest is 46°F, on August 31, 1935. The wettest August brought 8.29 in (2026).
The August mean against the 1991-2020 normal of 72.1°F: 2021 74.9°F (+2.8), 2022 73.0°F (+0.9), 2023 71.7°F (−0.4), 2024 74.7°F (+2.6), 2026 72.2°F (+0.1). 4 of 5 ran warmer than normal.
| August | Mean | Against normal | Precip. |
|---|---|---|---|
| 2021 | 74.9°F | +2.8°F | 6.27 in |
| 2022 | 73.0°F | +0.9°F | 4.46 in |
| 2023 | 71.7°F | −0.4°F | 4.34 in |
| 2024 | 74.7°F | +2.6°F | 3.78 in |
| 2026 | 72.2°F | +0.1°F | 8.29 in |
Source: records: ACIS, station USW00014762; recent months: ACIS, station USW00014762. Records and recent months use complete months only.
How does August in West Mifflin compare across Pennsylvania?
Across the 108 places PlainClimate covers in Pennsylvania, August normal highs run from 75°F in Laporte to 87°F in Marcus Hook; West Mifflin's is 81°F.
Source: NOAA NCEI 1991-2020 monthly normals for every station in the state.
Other months and places
- West Mifflin in July83°F by day, 64°F at night
- West Mifflin in September75°F by day, 56°F at night
- West Mifflin through the yearEvery month, frost dates, records and recent years
- Pennsylvania in AugustThe statewide normal and the warmest and coolest places
- Marcus Hook: Pennsylvania's warmest Augustnormal high 87°F