Williamsport weather in August: Williamsport, Pennsylvania: normal highs, lows, rain and records for August
Williamsport in August has a normal high of 83°F and a normal low of 61°F, a daily mean of 72°F, falling from 84°F on the 1st to 80°F by the 31st. Measurable precipitation falls on 11 days in a normal August, 4.17 inches in all. (NOAA 1991-2020 normals)
In metric: a normal high of 28°C and low of 16°C, 106 mm of precipitation in August.
- NOAA stationWilliamsport Regional Airport
- Station IDUSW00014778
- Location41.24°N 76.92°W
- Elevation520 ft (159 m)
- Population27,628
- Jan 35° 20°
- Feb 39° 22°
- Mar 48° 29°
- Apr 62° 39°
- May 72° 49°
- Jun 81° 58°
- Jul 85° 63°
- Aug 83° 61°
- Sep 75° 54°
- Oct 63° 43°
- Nov 51° 33°
- Dec 40° 26°
Each month: normal high (large) and low, °F. Fill: the month's normal mean, colder blue to hotter red.
How warm is Williamsport in August?
The normal high is 83°F and the normal low 61°F, for a daily mean of 72.0°F. August is 1.7°F cooler than July and 7.3°F warmer than September. August is the 2nd warmest month of the year in Williamsport and the 3rd wettest. Across the month the normal high falls 4°F, from 84°F on August 1 to 80°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 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 38%).
| Day | High | Low | Chance of 0.01 in | Chance of 0.10 in |
|---|---|---|---|---|
| August 1 | 84°F | 63°F | 38% | 24% |
| August 8 | 84°F | 62°F | 37% | 24% |
| August 15 | 83°F | 62°F | 35% | 22% |
| August 22 | 82°F | 61°F | 33% | 21% |
| August 31 | 80°F | 59°F | 32% | 20% |
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 | 84°F | 63°F | 38% | 24% | 14 h 20 min |
| August 2 | 84°F | 63°F | 38% | 24% | 14 h 20 min |
| August 3 | 84°F | 63°F | 37% | 24% | 14 h 20 min |
| August 4 | 84°F | 63°F | 37% | 24% | 14 h 20 min |
| August 5 | 84°F | 62°F | 37% | 24% | 14 h 20 min |
| August 6 | 84°F | 62°F | 37% | 24% | 14 h 10 min |
| August 7 | 84°F | 62°F | 37% | 24% | 14 h 10 min |
| August 8 | 84°F | 62°F | 37% | 24% | 14 h 10 min |
| August 9 | 84°F | 62°F | 36% | 23% | 14 h 10 min |
| August 10 | 84°F | 62°F | 36% | 23% | 14 h |
| August 11 | 84°F | 62°F | 36% | 23% | 14 h |
| August 12 | 83°F | 62°F | 36% | 23% | 14 h |
| August 13 | 83°F | 62°F | 35% | 23% | 14 h |
| August 14 | 83°F | 62°F | 35% | 22% | 14 h |
| August 15 | 83°F | 62°F | 35% | 22% | 13 h 50 min |
| August 16 | 83°F | 61°F | 35% | 22% | 13 h 50 min |
| August 17 | 83°F | 61°F | 34% | 22% | 13 h 50 min |
| August 18 | 83°F | 61°F | 34% | 22% | 13 h 50 min |
| August 19 | 83°F | 61°F | 34% | 21% | 13 h 40 min |
| August 20 | 82°F | 61°F | 34% | 21% | 13 h 40 min |
| August 21 | 82°F | 61°F | 33% | 21% | 13 h 40 min |
| August 22 | 82°F | 61°F | 33% | 21% | 13 h 40 min |
| August 23 | 82°F | 60°F | 33% | 20% | 13 h 30 min |
| August 24 | 82°F | 60°F | 33% | 20% | 13 h 30 min |
| August 25 | 82°F | 60°F | 33% | 20% | 13 h 30 min |
| August 26 | 81°F | 60°F | 32% | 20% | 13 h 30 min |
| August 27 | 81°F | 60°F | 32% | 20% | 13 h 20 min |
| August 28 | 81°F | 60°F | 32% | 20% | 13 h 20 min |
| August 29 | 81°F | 59°F | 32% | 20% | 13 h 20 min |
| August 30 | 81°F | 59°F | 32% | 20% | 13 h 20 min |
| August 31 | 80°F | 59°F | 32% | 20% | 13 h 10 min |
- Normal high
- 83°FAugust average
- Normal low
- 61°FAugust average
- Precipitation
- 4.17 inmonth total
- Days with precipitation
- 110.01 inch or more
- Days at 90°F or more
- 4
- 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
- 23
- Sunshine
- 75%of clear-sky sunlight (NASA)
Source: NOAA NCEI 1991-2020 daily normals, station USW00014778; monthly normals. Daylight is computed from the place's latitude with NOAA's solar equations.
Does it rain in Williamsport in August?
On a given August day the chance of 0.01 inch or more is 35% on average, highest around August 1 (38%). In all, 4.17 in falls on 11 days of a normal August, 1 of them with an inch or more.
In a normal August in Williamsport, 4 days reach 90°F.
Source: NOAA NCEI 1991-2020 daily and monthly normals, station USW00014778.
How humid and windy is Williamsport in August?
At 3 p.m. the normal temperature is 79°F with 50% relative humidity and a dew point of 59°F; at 6 a.m. it is 61°F with 91% humidity. The wind averages 4.4 mph, most often from the southwest in the afternoon.
| Time | Temperature | Dew point | Humidity | Wind | Clear or few clouds |
|---|---|---|---|---|---|
| 6 a.m. | 61°F | 58°F | 91% | 2.9 mph | – |
| 9 a.m. | 68°F | 60°F | 76% | 5.1 mph | 48% |
| noon | 76°F | 60°F | 57% | 6.2 mph | 50% |
| 3 p.m. | 79°F | 59°F | 50% | 7.2 mph | 47% |
| 6 p.m. | 76°F | 61°F | 60% | 5.4 mph | 64% |
| 9 p.m. | 68°F | 61°F | 80% | 3.2 mph | 67% |
Source: NOAA NCEI 1991-2020 hourly normals, station USW00014778. 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 Williamsport?
The warmest August temperature on Williamsport's official record (since 1895) is 103°F, on August 7, 1918; the coldest is 38°F, on August 25, 1940. The wettest August brought 9.65 in (1912).
The August mean against the 1991-2020 normal of 72.0°F: 2021 75.6°F (+3.6), 2022 75.1°F (+3.1), 2023 71.5°F (−0.5), 2024 72.2°F (+0.2), 2025 70.0°F (−2.0), 2026 72.0°F (at normal). 3 of 6 ran warmer than normal.
| August | Mean | Against normal | Precip. |
|---|---|---|---|
| 2021 | 75.6°F | +3.6°F | 3.92 in |
| 2022 | 75.1°F | +3.1°F | 2.63 in |
| 2023 | 71.5°F | −0.5°F | 8.61 in |
| 2024 | 72.2°F | +0.2°F | 7.07 in |
| 2025 | 70.0°F | −2.0°F | 1.40 in |
| 2026 | 72.0°F | at normal | 8.75 in |
Source: records: ACIS, NWS threaded record IPTthr; recent months: ACIS, station USW00014778. Records and recent months use complete months only.
How does August in Williamsport 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; Williamsport's is 83°F.
Source: NOAA NCEI 1991-2020 monthly normals for every station in the state.
Other months and places
- Williamsport in July85°F by day, 63°F at night
- Williamsport in September75°F by day, 54°F at night
- Williamsport 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