Climateby Month

Gettysburg, PA climate by month

NOAA 1991-2020 normals · 537 ft elevation

Gettysburg has warm and often humid summers and cold and snowy winters. Highs peak at 86°F in July and fall to 38°F in January. Wet days are spread through the year, from about 9 to 13 a month. Normal snowfall is about 27 in a year. By our comfort score the best month is May.

Warmest month
86°F
July normal high
Coldest month
22°F
January normal low
Wet days a year
123
45.3 in of precipitation
Snow a year
27.0 in
normal snowfall

How warm is Gettysburg?

Normal highs range from 38°F in January to 86°F in July.

20°40°60°80°100° January: normal high 38°F (3°C), low 22°F (-6°C) 38° 22° February: normal high 41°F (5°C), low 23°F (-5°C) March: normal high 50°F (10°C), low 30°F (-1°C) April: normal high 62°F (17°C), low 41°F (5°C) May: normal high 72°F (22°C), low 51°F (11°C) June: normal high 81°F (27°C), low 60°F (16°C) July: normal high 86°F (30°C), low 65°F (18°C) 86° 65° August: normal high 84°F (29°C), low 63°F (17°C) September: normal high 77°F (25°C), low 56°F (13°C) October: normal high 65°F (18°C), low 44°F (7°C) November: normal high 53°F (12°C), low 35°F (2°C) December: normal high 43°F (6°C), low 27°F (-3°C) JFMAMJJASOND

Bars run from the normal low to the normal high for each month.

How rainy is Gettysburg?

May has the most wet days (about 13); the year brings about 45 in of precipitation.

January: 10 wet days February: 9 wet days March: 10 wet days April: 12 wet days May: 13 wet days 13 June: 11 wet days July: 11 wet days August: 9 wet days September: 10 wet days October: 9 wet days November: 9 wet days 9 December: 10 wet days JFMAMJJASOND

Wet day: at least 0.01 in of rain or melted snow, counted from daily records 1991-2020.

How much does it snow?

Normal snowfall is 27.0 in a year, most of it in January.

January: 8.7 in of snow 8.7 February: 8.7 in of snow March: 5.1 in of snow April: 0.3 in of snow May: 0.0 in of snow 0.0 June: 0.0 in of snow July: 0.0 in of snow August: 0.0 in of snow September: 0.0 in of snow October: 0.2 in of snow November: 0.4 in of snow December: 3.6 in of snow JFMAMJJASOND

How humid is Gettysburg?

Muggy days peak in July, at about 17 days.

January: 0 muggy days 0 February: 0 muggy days March: 0 muggy days April: 0 muggy days May: 2 muggy days June: 8 muggy days July: 17 muggy days 17 August: 13 muggy days September: 5 muggy days October: 1 muggy days November: 0 muggy days December: 0 muggy days JFMAMJJASOND

Muggy day: daily mean dew point of 65°F or higher, from hourly observations 1991-2020 at Capital City Airport, 33 mi NE of the city center (the nearest airport with complete hourly records).

How much daylight?

Daylight ranges from about 9.4 hours in December to 15.0 hours in June.

January: 9.7 hours of daylight February: 10.7 hours of daylight March: 12.0 hours of daylight April: 13.3 hours of daylight May: 14.4 hours of daylight June: 14.9 hours of daylight 14.9 July: 14.7 hours of daylight August: 13.7 hours of daylight September: 12.4 hours of daylight October: 11.1 hours of daylight November: 10.0 hours of daylight December: 9.4 hours of daylight 9.4 JFMAMJJASOND
See all numbers
Monthly climate normals and day counts for Gettysburg, 1991-2020
MonthHighLowPrecip.Wet daysSnowMuggy daysDaylight
January 38°F22°F 3.5 in10 8.7 in 0 9.7 h
February 41°F23°F 2.6 in9 8.7 in 0 10.7 h
March 50°F30°F 3.6 in10 5.1 in 0 12.0 h
April 62°F41°F 3.9 in12 0.3 in 0 13.3 h
May 72°F51°F 4.4 in13 0.0 in 2 14.4 h
June 81°F60°F 4.2 in11 0.0 in 8 14.9 h
July 86°F65°F 3.6 in11 0.0 in 17 14.7 h
August 84°F63°F 3.7 in9 0.0 in 13 13.7 h
September 77°F56°F 5.2 in10 0.0 in 5 12.4 h
October 65°F44°F 3.9 in9 0.2 in 1 11.1 h
November 53°F35°F 3.2 in9 0.4 in 0 10.0 h
December 43°F27°F 3.4 in10 3.6 in 0 9.4 h

High and low: NOAA 1991-2020 normal daily high and low. Wet days: at least 0.01 in of rain or melted snow. Muggy days: daily mean dew point 65°F or higher.

Best months to visit Gettysburg

By our comfort score, the best month is May.

Comfort score by month (0-100) and its parts, in days per month
MonthScoreComfortableNotable rainHot or cold
Jan 290719
Feb 361514
Mar 47477
Apr 631071
May 691481
Jun 63974
Jul 51279
Aug 55565
Sep 641362
Oct 621360
Nov 47454
Dec 331614

Score = 40 × share of comfortable days + 25 × share of days without notable rain + 20 × share of days neither hot (90°F+) nor cold (high 40°F or below) + 15 × daylight. How the score works.

Frost dates in Gettysburg

The last spring frost typically comes around Apr 15, and the first fall frost around Oct 27, leaving 194 frost-free days in a typical year.

Frost and freeze dates for Gettysburg
Typical date1 year in 10
Last spring frost (32°F)Apr 15after May 4
First fall frost (32°F)Oct 27before Oct 11
Last hard freeze (28°F)Apr 3after Apr 17
First hard freeze (28°F)Nov 8before Oct 26
Frost-free season194 daysunder 172 days

"Typical" is the date with a 50% chance of a later spring frost (or earlier fall frost). Planting after the "1 year in 10" spring date gives a 90% chance of no further frost. The Old Farmer's Almanac publishes 30% dates, which fall between our typical and 1-in-10 dates.

Station: Biglerville (USC00360656), NOAA 1991-2020 freeze probabilities. Frost dates for every city in Pennsylvania.

Hottest and coldest readings, 1991-2020

The highest reading was 101°F (July 23, 2011); the lowest was -18°F (January 20, 1994, and 1 other day).

From the temperature station's daily records with NOAA quality flags removed. Not an all-time record.

Near Gettysburg

Similar climates elsewhere

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.

Distances from the city center (USGS). Methodology · Report an error