Climate and monthly weather forecastGettysburg, PA
Climate and monthly weather forecast
The climate of Gettysburg
The climatological overview of Gettysburg, Pennsylvania, USA, reveals a propensity for a Humid subtropical climate, scientifically classified under the Köppen climate designation as Cfa. The Humid subtropical climate refers to the region that has no dry season, implying that rainfall can be expected throughout the year. The city rests on the latitude where this type of climate prevails, neighboring regions with moderate subtropical and temperate climatic conditions.From January to December, Gettysburg's climate presents an interesting variability in the range of temperatures, rainfall, snowfall, daylight and other meteorological parameters. The temperatures rise and fall throughout the year, reaching a peak of 84°F (28.9°C) in July, and descending to a low of 22.6°F (-5.2°C) in January. There is a noticeable fluctuation in levels of humidity, wind speeds, and air pressure. These variations significantly shape the city's weather patterns, shaping the lifestyle and activities of the residents.
The city does not remain dry in any month, with rainfall measurements ranging from a minimum of 0.71in in January and February to a maximum of 1.46in in July. The peak summer month, July, coincides with the maximum rainfall, pointing to the possible occurrence of hot and humid conditions. Additionally, the city witnesses snowfall from January to April and in November and December, reaching its maximum (1.3in) in March.
Unpredictable weather events might occur but usually conform to the broader climate pattern. Exceptionally hot or cold months can register temperatures higher or lower than the annual average. Extreme climate events might also cause rainfall and snowfall levels to soar or fall drastically.
The best time to visit Gettysburg
Given the available climatological data, the most fitting time for tourism in Gettysburg, would arguably be during the late spring, from May to early June. During this time, the temperature ranges from 61°F (16.1°C) to 71.1°F (21.7°C), offering a delightful climatic setting for sightseeing and outdoor activities. There is moderate rainfall during this period, averaging around 1.02in to 1.34in that would not disturb sightseeing and outdoor recreational activities.The worst time to visit Gettysburg
Conversely, the least opportune time to visit Gettysburg would be in the midst of winter, specifically between the months of December to February. During this period, temperatures plunge to a chilly range between 22.6°F (-5.2°C) to 25.2°F (-3.8°C), likely to be uncomfortably cold for visitors unaccustomed to such weather. Additionally, snowfall occurs during these months, which could potentially disrupt transport and accessibility to key tourist locations.Spring weather in Gettysburg
Spring, encompassing the months from March to May, ushers in a period of gradual warming following winter's frigid embrace. March sees a significant jump in temperatures, climbing up from 32°F (0°C) to 48.4°F (9.1°C). By the end of May, temperatures have reached a welcoming 71.1°F (21.7°C). Despite the higher temperatures, Spring is also a relatively wet season with rainfall peaking in May at 1.34in. Sunshine hours increase from 6.5h in March to 8.5h in May, providing longer daylight hours for exploring the outdoors.Summer weather in Gettysburg
Arriving in June and spanning till August, summer ushers in a combination of warmer temperatures alongside increased rainfall. The temperatures reach their annual maximum in July, hitting a high of 84°F (28.9°C). Rainfall also steeply escalates reaching the annual maximum of 1.46in in July. However, sunshine hours peak at 10.6h offering bright and sunny days despite intermittent rain showers.Autumn weather in Gettysburg
Autumn, covering September to November, provides a period of gradual cooling as temperatures slide from 74.8°F (23.8°C) in September to a much cooler 50.7°F (10.4°C) in November. Rainfall recedes back to a lower level of 0.87in in November from its peak in Summer. However, sunshine hours decrease considerably, falling from 8.9h in September to 5.6h in November, indicating shorter daytime hours.Winter weather in Gettysburg
December welcomes the Winter season in Gettysburg, with temperatures falling drastically to a nippy range of 29.8°F (-1.2°C) to 41.5°F (5.3°C) in December. This season also marks the resumption of snowfall with December seeing snowfall of 0.83in, and snowfall days increasing to 3.4 days from zero in November. Despite the cold and snowy conditions, there is a substantial amount of sunlight at 4.9h per day on average, with cloud coverage at 47%.Weather in January
During January in Gettysburg, Pennsylvania, weather patterns exhibit classic winter conditions, being the second coldest month after December. The low temperatures bring about the formation of a frosty landscape typical during this time of year. Weather in January »Weather in February
February marks the shift from the intensity of winter experienced in January. Temperatures experience a slight increase hinting towards the upcoming spring season. Despite being the shortest month, February averages 1.14" (29mm) of snow, a modest decline compared to January. Weather in February »Weather in March
As the Spring season in Gettysburg welcomes March, the weather begins its transition from icy winter to milder spring temperatures that average from 32°F (0°C) to 48.4°F (9.1°C). Snowfall becomes less frequent, averaging around 1.3" (33mm), and rainfall increases. Weather in March »Weather in April
April's arrival brings growing daylight hours and an end to the winter season in Gettysburg. There is a noticeable change in the weather patterns including reduced snowfall, with just 0.08" (2mm) recorded on average. More rainfall can be expected as April sees the onset of increasingly wet conditions. Weather in April »Weather in May
May in Gettysburg signifies the official start of the warm season with temperatures increasing significantly to fall between 52.2°F (11.2°C) and 71.1°F (21.7°C), contributing to the bloom of flora throughout the city. Changes in atmospheric pressure and temperature trends bring about regular rain showers, rendering it the wettest month with expected rainfall reaching 1.34" (34mm). Weather in May »Weather in June
June in Gettysburg is characterized by long days and the onset of summer heat. There's a welcome drop in the cloud cover, promoting higher amounts of sunshine averaging around 15 hours a day. Precipitation trends shift from heavy rainfall towards more moderate rates at 1.1" (28mm) over the month. Weather in June »Weather in July
July is the pinnacle of the summer season in Gettysburg and is known for its hot temperatures reaching up to 84°F (28.9°C). The town is met with a decrease in relative humidity and cloud cover, allowing the maximum sunshine hours to peak at 10.6 hours a day. Weather in July »Weather in August
August is characterized by slightly lower temperatures falling from 64°F (17.8°C) to 81.3°F (27.4°C), compared to July, providing a refreshing relief from the peak of the summer heat. Rainfall continues to play a significant role providing 1.42" (36mm) over the month. Weather in August »Weather in September
The arrival of September marks the transition from summer to fall in Gettysburg, heralding a consistent drop in temperatures. The weather still feels predominantly warm, but rainfall becomes less frequent, decreasing to 0.75" (19mm) over the month. Weather in September »Weather in October
October brings a definite feel of autumn to Gettysburg with cooler temperatures, colorful foliage, and the increase in wind speeds up to 6.6mph (10.6km/h). As the month progresses, residents begin to notice shorter days and longer nights, a hallmark of the fall season. Weather in October »Weather in November
As November unfolds in Gettysburg, a crisp chill permeates the air, and signs of approaching winter become evident with temperatures ranging from 35.4°F (1.9°C) to 50.7°F (10.4°C). Cloud cover shows an uptick, yet sunshine hours hold steady at 5.6 hours a day, signaling the increased likelihood of shorter, grayer days. Weather in November »Weather in December
December in Gettysburg brings the full onset of winter, with temperatures falling from 29.8°F (-1.2°C) to 41.5°F (5.3°C). Good amounts of snowfall are expected with an accumulation of approximately 0.83" (21mm) of snow over the month. Weather in December »Updated: Aug 4, 2024
Published by: Weather Atlas | About Us
Data Sources | Weather Forecasting & Climate
Published by: Weather Atlas | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
The lowest temperatures are recorded in January, with averages reaching a high of 35.6°F (2°C) and a low of 22.6°F (-5.2°C).
The months with the least rainfall are January and February Rain falls for 5 days and accumulates 0.71" (18mm) of rain.
In Gettysburg, during the entire year, the rain falls for 125 days and collects up to 12.13" (308mm) of precipitation.
January through April, October through December are months with snowfall.
Throughout the year, there are 20.9 snowfall days, and 4.8" (122mm) of snow is accumulated.
January, February, November and December, with an average maximum UV index of 2, are months with the lowest UV index.
February has the least sunshine of the year, with an average of 4.6h of sunshine.
March is the month with the most snowfall. Snow falls for 3.9 days and accumulates 1.3" (33mm) of snow.
On Sunday, March 10. 2024, at 2:00 am, Daylight Saving Time starts, and the time zone changes from EST to EDT. Daylight Saving Time ends Sunday, November 3. 2024, at 2:00 am, and the time zone reverts from EDT to EST.
The months with the lowest humidity are April and July, with an average relative humidity of 75%.
The most humid month is May, with an average relative humidity of 80%.
May through September are months without snowfall.
May through July, with an average maximum UV index of 6, are months with the highest UV index.
June has the longest days of the year, with an average of 14h and 54min of daylight.
In Gettysburg, temperatures reach their average annual highs in July, measuring 84°F (28.9°C) and a minimum average of 64°F (17.8°C).
July is the month with the most rainfall. Rain falls for 14.3 days and accumulates 1.46" (37mm) of precipitation.
July has the most sunshine of the year, with an average of 10.6h of sunshine.
The month with the shortest days is December, with an average of 9h and 24min of daylight.
Average temperature
Gettysburg, PA
The warmest month (with the highest average high temperature) is July (84°F).
The month with the lowest average high temperature is January (35.6°F).
The month with the highest average low temperature is July (64°F).
The coldest month (with the lowest average low temperature) is January (22.6°F).
Average pressure
Gettysburg, PA
- Average pressure in January:
30.1"Hg - Average pressure in February:
30.07"Hg - Average pressure in March:
30.08"Hg - Average pressure in April:
29.99"Hg - Average pressure in May:
30.01"Hg - Average pressure in June:
29.95"Hg
- Average pressure in July:
29.97"Hg - Average pressure in August:
30"Hg - Average pressure in September:
30.06"Hg - Average pressure in October:
30.04"Hg - Average pressure in November:
30.14"Hg - Average pressure in December:
30.11"Hg
The month with the highest atmospheric pressure is November (30.14"Hg).
The month with the lowest atmospheric pressure is June (29.95"Hg).
Average wind speed
Gettysburg, PA
- Average wind speed in January:
8.1mph - Average wind speed in February:
8.1mph - Average wind speed in March:
8.1mph - Average wind speed in April:
8mph - Average wind speed in May:
6.3mph - Average wind speed in June:
5.8mph
- Average wind speed in July:
4.9mph - Average wind speed in August:
4.8mph - Average wind speed in September:
5.4mph - Average wind speed in October:
6.6mph - Average wind speed in November:
7.1mph - Average wind speed in December:
7.6mph
The windiest months (with the highest average wind speed) are January, February and March (8.1mph).
The calmest month (with the lowest average wind speed) is August (4.8mph).
Average humidity
Gettysburg, PA
The month with the highest relative humidity is May (80%).
The months with the lowest relative humidity are April and July (75%).
Average rainfall
Gettysburg, PA
- Average rainfall in January:
0.71" - Average rainfall in February:
0.71" - Average rainfall in March:
0.87" - Average rainfall in April:
1.02" - Average rainfall in May:
1.34" - Average rainfall in June:
1.1"
- Average rainfall in July:
1.46" - Average rainfall in August:
1.42" - Average rainfall in September:
0.75" - Average rainfall in October:
1.02" - Average rainfall in November:
0.87" - Average rainfall in December:
0.87"
The wettest month (with the highest rainfall) is July (1.46").
The driest months (with the least rainfall) are January and February (0.71").
Average rainfall days
Gettysburg, PA
- Average rainfall days in January:
5 days - Average rainfall days in February:
6.6 days - Average rainfall days in March:
10.2 days - Average rainfall days in April:
12.3 days - Average rainfall days in May:
14.8 days - Average rainfall days in June:
12.8 days
- Average rainfall days in July:
14.3 days - Average rainfall days in August:
14.6 days - Average rainfall days in September:
10.5 days - Average rainfall days in October:
9.4 days - Average rainfall days in November:
7 days - Average rainfall days in December:
7.5 days
The month with the highest number of rainy days is May (14.8 days).
The month with the least rainy days is January (5 days).
Average snowfall
Gettysburg, PA
The month with the highest snowfall is March (1.3").
The months with the least snowfall are May, June, July, August and September (0").
Average snowfall days
Gettysburg, PA
- Average snowfall days in January:
6.1 days - Average snowfall days in February:
6.4 days - Average snowfall days in March:
3.9 days - Average snowfall days in April:
0.4 days - Average snowfall days in May:
0.1 days - Average snowfall days in June:
0 days
- Average snowfall days in July:
0 days - Average snowfall days in August:
0 days - Average snowfall days in September:
0 days - Average snowfall days in October:
0.1 days - Average snowfall days in November:
0.5 days - Average snowfall days in December:
3.4 days
The month with the highest number of snowfall days is February (6.4 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight / Average sunshine
Gettysburg, PA
- Average daylight in January:
9h and 42min - Average daylight in February:
10h and 42min - Average daylight in March:
12h and 0min - Average daylight in April:
13h and 18min - Average daylight in May:
14h and 24min - Average daylight in June:
14h and 54min
- Average daylight in July:
14h and 42min - Average daylight in August:
13h and 42min - Average daylight in September:
12h and 24min - Average daylight in October:
11h and 6min - Average daylight in November:
10h and 0min - Average daylight in December:
9h and 24min
The month with the longest days is June (Average daylight: 14h and 54min).
The month with the shortest days is December (Average daylight: 9h and 24min).
- Average sunshine in January:
4h and 48min - Average sunshine in February:
4h and 36min - Average sunshine in March:
6h and 30min - Average sunshine in April:
8h and 24min - Average sunshine in May:
8h and 30min - Average sunshine in June:
10h and 0min
- Average sunshine in July:
10h and 36min - Average sunshine in August:
10h and 12min - Average sunshine in September:
8h and 54min - Average sunshine in October:
5h and 30min - Average sunshine in November:
5h and 36min - Average sunshine in December:
4h and 54min
The month with the most sunshine is July (Average sunshine: 10h and 36min).
The month with the least sunshine is February (Average sunshine: 4h and 36min).
Average sunshine days
Gettysburg, PA
- Average sunshine days in January:
20.8 days - Average sunshine days in February:
16.8 days - Average sunshine days in March:
17.2 days - Average sunshine days in April:
15 days - Average sunshine days in May:
13.7 days - Average sunshine days in June:
13.8 days
- Average sunshine days in July:
13.8 days - Average sunshine days in August:
13.6 days - Average sunshine days in September:
16.3 days - Average sunshine days in October:
19.4 days - Average sunshine days in November:
21.6 days - Average sunshine days in December:
20.6 days
The month with the most sunshine days is November (21.6 days).
The month with the least sunshine days is August (13.6 days).
Average UV index
Gettysburg, PA
The months with the highest UV index are May, June and July (UV index 6).
The months with the lowest UV index are January, February, November and December (UV index 2).
Average cloud cover
Gettysburg, PA
The month with the most cloud cover is February (Cloud cover 49).
The month with the least cloud cover is July (Cloud cover 31).
Average visibility
Gettysburg, PA
The months with the highest visibility are January, February, March, April, June, July, August, October, November and December (6mi).
The months with the lowest visibility are May and September (5mi).
