Last updated: February 24, 2025
In December, Gettysburg experiences a striking contrast in temperatures, with daily maximums reaching 18°C (64°F) and dipping to a chilling -13°C (10°F). The average temperature hovers around a brisk 3°C (38°F), creating a brisk atmosphere. This month also brings 92 mm (3.6 in) of precipitation over approximately 9 days, contributing to a notably humid environment with an average humidity level of 84%. Visitors will find a blend of crisp air and occasional moisture, making December in Gettysburg a unique experience for those who embrace the winter season.
In December, Gettysburg experiences a noticeable chill as winter firmly settles in. With minimum temperatures dipping to around -13°C (10°F), the month showcases the onset of colder weather compared to the milder fall. The average temperature hovers around 3°C (38°F), offering a brisk atmosphere for residents and visitors alike. Despite these cold conditions, max temperatures can reach a more manageable 18°C (64°F), providing brief moments of comfort amid the winter chill. This month serves as a transitional phase, where the last remnants of autumn blend into the frosty embrace of winter, setting the stage for the icy months ahead.
In December, Gettysburg experiences a transition into winter, with precipitation measuring 92 mm (3.6 in) over the course of about 9 rainy days. This level of rainfall is consistent with the previous months, showing a slight decrease compared to November's 86 mm but still contributing to the overall wetness leading into the new year. The month's precipitation is relatively steady, reflecting a pattern that tends to stabilize around this time, following the wetter spring and summer months. Even as temperatures drop, this rainfall supports the lush landscapes that characterize the region, highlighting Gettysburg's dynamic climate as it shifts from the vibrancy of autumn into the chill of winter.
In Gettysburg, December sees humidity levels at a notable 84%, reflecting a trend of elevated moisture that begins in November and persists into the new year. Throughout the colder months, humidity remains relatively high, peaking at 85% in November before slightly dipping in December. This contrasts sharply with the warmer summer months, where humidity levels drop significantly, reaching a yearly low of 72% in August. The gradual decline from January's 84% to July's 74% illustrates a seasonal pattern, while December’s humidity heralds the return of a moist winter atmosphere, hinting at the ongoing influence of seasonal transitions on weather experiences in the region.
As December rolls into Gettysburg, the UV Index settles at 3, indicating a moderate level of sun exposure. This marks a notable decrease from the summer months, where the index often peaked at 10 during June and July, requiring only a quick 15-minute burn time before sun protection became essential. As the year progresses from the high UV levels in spring and summer to a more manageable moderate rating in winter, residents and visitors can enjoy outdoor activities with a reduced risk of sunburn, absorbing the serene winter landscape for up to 30 minutes. This trend highlights the seasonal fluctuations in UV exposure, reminding us that even in the cooler months, some sun safety measures remain relevant. For a more detailed look at the UV Index throughout the year, check out Gettysburg UV Index.
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As December settles in Gettysburg, the town experiences a shift from the abundant sunshine of summer toward the more subdued winter light. With an average of 183 hours of sunshine, December marks a dip compared to the radiant highs of July, which boasts a remarkable 350 hours. While the winter months generally see less daylight, it's interesting to note that December's sunshine still outshines the dreariness of January, where only 140 hours are captured. The transition from the vibrant 269 hours in May and a peak of 321 hours in June creates an inviting atmosphere, perfect for holiday festivities against a backdrop of winter's chill. Thus, while December may not compete with the summer’s splendor, it retains a charm of its own, offering moments of brightness during the cozy winter days.
In Gettysburg, the likelihood of sunny weather tends to fluctuate throughout the year, with December sitting at a modest 33% chance of sunshine. This represents one of the lower probabilities when compared to the more promising months of November and March, which boast 53% and 52% chances, respectively. As we transition from the mild autumn into winter, the trend shows a noticeable drop in sunny days, with December trailing behind windier summer months like July, which offers a 50% chance of sun. Overall, while December doesn’t promise a lot of sunshine, it’s part of a seasonal pattern that underscores the distinct shifts in Gettysburg’s weather dynamics, with brief sunny windows amidst the colder, cloudier days.
As December settles over Gettysburg, daylight dips to 9 hours, mirroring the shorter days of November. This pattern reflects a significant trend, with daylight duration gradually increasing from the depths of winter in January to a peak of 14 hours during the summer months of June, July, and August. The transformation is gradual, with each spring month heralding longer days—March boasting 11 hours and April increasing to 13 hours. By the time November rolls around, the daylight recedes again, marking the onset of winter. Thus, December serves as a reminder of the seasonal cycle, where daylight ebbs and flows, reminding residents that brighter days are just around the corner.
In December, the winds of Gettysburg settle into a calm rhythm, averaging 2.8 m/s (6 mph), mirroring the subdued breezes typical of late autumn. Throughout the year, wind speeds in this historic town exhibit a general decline from the briskness of March at 3.4 m/s (8 mph), gradually easing down to the gentle sighs of summer. As the temperatures drop, December’s winds remain consistent with those of November, maintaining a steady yet tranquil presence. This transition reflects a broader trend where the early months of the year usher in sharper gusts, only to give way to a softer breeze in the latter part of the year, creating a serene atmosphere perfect for contemplating the rich history of this iconic landscape.
The weather in Gettysburg changes throughout the year, offering a unique experience in each season. Below is a month-by-month comparison of December's weather with other months, highlighting differences in temperature, precipitation, and other key factors. Click on each section to discover seasonal trends in Gettysburg and find detailed weather information for every month.
In December, temperatures in Gettysburg range from a chilly minimum of -13°C (10°F) to a mild maximum of 18°C (64°F), with an average of 3°C (38°F). The month experiences about 92 mm (3.6 in) of precipitation over 9 days, accompanied by a relatively high humidity of 84%. In contrast, January sees even colder temperatures, with a minimum of -17°C (2°F) and a slightly warmer maximum of 20°C (68°F), while the average temperature dips to 1°C (34°F). Precipitation decreases to 62 mm (2.4 in) over 8 days, yet the humidity remains consistent at 84%. For a more detailed look at January weather in the area, check out Gettysburg weather in January.
December and February exhibit notable differences in weather conditions. In December, temperatures range from a minimum of -13°C (10°F) to a maximum of 18°C (64°F), with an average of 3°C (38°F). The month sees about 92 mm (3.6 in) of precipitation over 9 days, accompanied by a high humidity level of 84%. Conversely, February experiences slightly colder minimum temperatures at -17°C (2°F) but can reach a warmer maximum of 27°C (80°F), maintaining the same average of 3°C (38°F). Precipitation increases slightly to 97 mm (3.8 in) over 11 days, while humidity remains comparable at 83%. For those interested in specific February conditions, you can find more detailed information here: Gettysburg weather in February.
December and March present distinctly different weather patterns despite their proximity on the calendar. In December, temperatures generally range from a chilly minimum of -13°C (10°F) to a more temperate maximum of 18°C (64°F), with an average temperature of around 3°C (38°F). The month experiences higher humidity levels at 84% and receives about 92 mm (3.6 in) of precipitation over approximately 9 days.
In contrast, March sees a notable warming trend, with daytime maximums reaching up to 25°C (78°F) and an average temperature of 6°C (44°F). The minimum temperature dips slightly lower at -14°C (7°F), but the overall feel is much milder. Precipitation remains similar, at 94 mm (3.7 in), though it occurs over 11 days, with humidity slightly lower at 83%. This transition from December to March showcases the gradual shift from winter's chill to the early warmth of spring. For more details, check out Gettysburg weather in March.
December and April present significantly different weather conditions. In December, temperatures can drop to a frigid minimum of -13°C (10°F), with an average of 3°C (38°F) and a maximum reaching only 18°C (64°F). The month sees about 92 mm (3.6 in) of precipitation over approximately 9 days, accompanied by a high humidity level of 84%. In contrast, April experiences milder temperatures, ranging from a minimum of -3°C (28°F) to a maximum of 30°C (86°F), with an average of 12°C (54°F). Precipitation slightly increases to 98 mm (3.9 in) and occurs on around 12 days, while humidity remains lower at 81%. For more detailed insights, you can check Gettysburg weather in April.
In December, the weather tends to be quite cold, with temperatures ranging from a minimum of -13°C (10°F) to a maximum of 18°C (64°F), and an average temperature of around 3°C (38°F). Precipitation is common, with about 92 mm (3.6 in) falling over 9 days, contributing to a relatively high humidity level of 84%. In contrast, May ushers in a much warmer climate, with temperatures between 0°C (33°F) and 32°C (91°F), and an average temperature of 18°C (64°F). Though it sees increased rainfall, totaling 132 mm (5.2 in) across 14 days, the humidity drops slightly to 78%. For a closer look at how pleasant and warm the weather can be in May, check out Gettysburg weather in May.
December and June present strikingly different weather conditions. In December, temperatures can plunge as low as -13°C (10°F), with an average temperature of around 3°C (38°F) and a maximum reaching 18°C (64°F). This month experiences significant precipitation, totaling 92 mm (3.6 in) over about 9 days, accompanied by high humidity at 84%. In contrast, June boasts much milder temperatures, with minimums of 8°C (47°F), averages of 22°C (73°F), and highs that can soar to 34°C (94°F). The month also sees slightly higher precipitation at 103 mm (4.1 in) over about 12 days, yet with a lower humidity of 79%. For more details on the pleasant conditions typical of this month, check out Gettysburg weather in June.
December and July present starkly contrasting weather conditions. In December, temperatures can plummet to a chilling minimum of -13°C (10°F), with an average around 3°C (38°F) and a maximum of 18°C (64°F). The month is characterized by high humidity at 84% and approximately 92 mm (3.6 in) of precipitation over 9 days. In contrast, July boasts much warmer weather, with temperatures ranging from a minimum of 14°C (57°F) to a sweltering maximum of 36°C (97°F) and an average of 25°C (78°F). Although July sees more precipitation at 134 mm (5.3 in) over 12 days, the humidity is lower at 74%. For a closer look at conditions during July, you can visit Gettysburg weather in July.
December and August present strikingly different weather patterns. In December, temperatures can plummet to a minimum of -13°C (10°F), with an average of 3°C (38°F) and highs reaching only 18°C (64°F). The month is characterized by higher humidity levels averaging 84% and substantial precipitation totaling 92 mm (3.6 in) over about 9 days. In contrast, August is much warmer, with minimum temperatures around 13°C (56°F), an average of 24°C (76°F), and maximum highs soaring to 36°C (97°F). While August experiences more precipitation at 118 mm (4.7 in) across 14 days, the humidity is lower at 72%, making for a more comfortable heat compared to December's chill. To explore more about the specifics of August weather, check out Gettysburg weather in August.
December and September present starkly contrasting weather patterns. In December, temperatures plummet to a minimum of -13°C (10°F), with an average of just 3°C (38°F) and a maximum of 18°C (64°F), while humidity levels rise to 84%. This month also sees a considerable amount of precipitation, averaging 92 mm (3.6 in) over 9 days. In contrast, September boasts a much milder climate, featuring a minimum temperature of 4°C (39°F) and soaring to an average of 21°C (70°F), peaking at a high of 34°C (93°F). Despite slightly higher precipitation at 118 mm (4.6 in) over the same 9 days, the overall humidity is lower at 75%. For more specific insights about the weather during this vibrant month, check out Gettysburg weather in September.
In comparing the weather of December and October, December presents a significantly colder profile, with temperatures dropping to a minimum of -13°C (10°F) and an average of 3°C (38°F). In contrast, October enjoys much milder conditions, where the minimum temperature is a relatively pleasant 1°C (33°F) and averages around 15°C (60°F), with daytime highs reaching up to 34°C (93°F). Precipitation levels are somewhat similar, with December receiving 92 mm (3.6 in) over 9 days and October accumulating 100 mm (3.9 in) across 10 days. Interestingly, December's humidity is slightly higher at 84% compared to October's 81%. For more details on the specifics of October's climate, check out Gettysburg weather in October.
In comparing the weather of December and November, December typically experiences a broader temperature range, with minimums plummeting to -13°C (10°F) and maximums reaching up to 18°C (64°F). In contrast, November is milder on average, with minimums around -6°C (21°F) and maximums peaking at 24°C (76°F). Additionally, December sees slightly more precipitation at 92 mm (3.6 in) over 9 days, compared to November’s 86 mm (3.4 in) over 7 days. Humidity levels are fairly consistent, with December at 84% and November at 85%. For a closer look at November weather patterns, you can explore Gettysburg weather in November.
As December settles in, Gettysburg experiences a significant drop in temperatures compared to the preceding months, with a chilly average around 3°C and the potential for harsher lows plummeting as low as -13°C. This month sets itself apart with increased precipitation, averaging 92 mm across about 9 rainy days—creating a stark contrast to the drier spells of autumn. The humidity rises notably, hovering around 84%, enhancing the biting cold. As such, December's climate invites a cozy retreat indoors, making it an ideal time to reflect on the historical beauty of this iconic battlefield. For a deeper understanding of how the climate shapes this region, visit Gettysburg Climate.