Gettysburg, PA weather in August
Gettysburg is warm and often humid in August, with some rain: highs average 84°F and nights drop to about 63°F. Rain falls on about 9 days. This is the peak of the warm season in Gettysburg.
- Normal high
- 84°F
- Normal low
- 63°F
- Wet days
- 9
- 3.7 in total
- Muggy days
- 13
- dew point 65°F+
How August changes from start to finish
| August 1 | August 31 | |
|---|---|---|
| Normal high | 85°F | 82°F |
| Normal low | 65°F | 61°F |
| Chance of a wet day | 33% | 29% |
| Sunrise / sunset | 6:07 am / 8:22 pm | 6:36 am / 7:42 pm |
| Daylight | 14.3 h | 13.1 h |
Chance of a wet day: average for the first and last 7 days of the month. Times are local clock time (Eastern Time).
A typical August day
- 6 am65°Fdew point 62°F
- 9 am74°Fdew point 64°F
- Noon81°Fdew point 63°F
- 3 pm83°Fdew point 62°F
- 6 pm80°Fdew point 63°F
- 9 pm72°Fdew point 64°F
NOAA hourly normals (local standard time) from Martinsburg E Wv Rgnl Airport (50 mi away); average wind 4 mph; clear or few clouds in 57% of daytime hours, mostly cloudy or overcast in 31%.
What kind of days to expect
- Comfortable dayshigh 65-80°F and dew point under 60°F5 of 31
- Hot dayshigh 90°F or more5 of 31
- Muggy daysdaily mean dew point 65°F or more13 of 31
- Wet daysat least 0.01 in of rain or melted snow9 of 31
- Notable rainat least 0.10 in6 of 31
- Freezing nightslow 32°F or below0 of 31
- Snow on the groundsnow depth 1 in or more0 of 31
Average days per August, counted from daily records for each year 1991-2020.
Rain in August
Normal precipitation is 3.7 in; a dry August brings about 2.7 in and a wet one about 4.8 in (25th and 75th percentiles). About 2 days bring half an inch or more, and about 1 an inch or more.
How August varies from year to year
- Warmest August, 1991-20202016: average high 89°F
- Coolest August1992: average high 78°F
- Wettest August2015: 6.8 in
- Driest August1995: 0.8 in
- Highest reading100°F (August 10, 2001)
- Lowest reading44°F (August 30, 1992)
From the station's daily records with NOAA quality flags removed; most recent date shown when a reading repeats.
August compared with July and September
| July | August | September | |
|---|---|---|---|
| Normal high | 86°F | 84°F | 77°F |
| Normal low | 65°F | 63°F | 56°F |
| Wet days | 11 | 9 | 10 |
| Comfortable days | 2 | 5 | 13 |
| Daylight | 14.7 h | 13.7 h | 12.4 h |
Highs change by -2°F from July and -7°F into September.
How Gettysburg ranks in August
- Normal high233rd warmest of 378 cities; 3rd of 4 in Pennsylvania
- Wet days214th driest of 378
- Comfortable days131st most of 341
What to pack for Gettysburg in August
- A rain jacket or umbrella – rain on about 9 days
Heating and cooling
August has 4 heating degree days and 266 cooling degree days (base 65°F), 4% of the year's total heating and cooling demand.
Questions
How hot is Gettysburg in August?
The normal high is 84°F and the normal low is 63°F. From 1991 to 2020 the hottest August reading was 100°F (August 10, 2001).
Does it rain a lot in Gettysburg in August?
About 9 days in August have at least 0.01 in of precipitation, and the normal total is 3.7 in. The wettest August in 1991-2020 was in 2015 (6.8 in); the driest was in 1995 (0.8 in).
Is August a good time to visit Gettysburg?
August ranks 6th of 12 months on our comfort score for Gettysburg (55 out of 100). It has about 5 comfortable days and about 5 days at 90°F or hotter. The best month is May.
Where the numbers come from
- Temperature, rain, snowfall, snow depth and frost dates: Biglerville (USC00360656), 7.3 mi N of the city center, 720 ft (183 ft higher than the city). NOAA normals and daily records, 1991-2020.
- Humidity and wind by hour and cloud cover: Martinsburg E Wv Rgnl Airport (USW00013734), 50 mi SW of the city center, 534 ft . NOAA normals and daily records, 1991-2020.
- Daily humidity and wind: Capital City Airport (725118-14751), 33 mi NE of the city center, 335 ft (202 ft lower than the city). Hourly observations, 1991-2020.