Last updated: February 24, 2025
In September, Gettysburg experiences a transition into autumn, marked by a maximum temperature soaring to 34°C (93°F) and a milder average of 21°C (70°F). Early mornings can be crisp, dipping down to a minimum of 4°C (39°F). Rain is a notable feature this month, with a total precipitation of 118 mm (4.6 in) over nine days, contributing to a humidity level of 75%. This blend of warmth and moisture not only shapes the local climate but also enhances the vibrant fall colors, making the historic landscape particularly picturesque.
In September, Gettysburg experiences a delightful transition, with temperatures beginning to cool down from the summer heat. The month records a minimum temperature of 4°C (39°F), rising to an average of 21°C (70°F), and peaks at a comfortable 34°C (93°F). This notable drop from the sweltering highs of July and August marks a shift towards crisp fall air, making it an ideal time for outdoor activities amid the changing foliage. As the month progresses, the weather offers a perfect blend of warmth and refreshing breezes, paving the way for a beautiful autumn in this historic town.
In September, Gettysburg experiences a consistent pattern in precipitation, with 118 mm (4.6 in) of rain falling over just 9 days. This marks the end of a notably wet summer, where July stood out with the highest rainfall of 134 mm (5.3 in) across 12 days. The trend from the previous months shows a gradual decline in both precipitation amounts and the number of rainy days as the region transitions into autumn. In contrast to the previous month's 14 days of rain in August, September’s rainfall offers a slight reprieve, yet it still sustains the overall moisture levels that have characterized the summer months. This blend of relatively high precipitation and fewer rainy days suggests a shift towards crisper days ahead while maintaining the lush greenery that often lingers into fall.
September in Gettysburg presents a modest shift in humidity, averaging 75%, reflecting a slight increase from the drier summer months of July and August, which bottomed out at 74% and 72%, respectively. As the warm days of summer give way to the crispness of fall, the humidity begins its gradual ascent, foreshadowing the wetter conditions typical of the upcoming months. Notably, this uptick marks a transition as the region prepares for the seasonal shift towards higher humidity levels in October (81%) and November (85%), setting the stage for a cozy autumn atmosphere enveloped in richer aromas and vibrant foliage.
As summer fades, September in Gettysburg still holds onto the sun's intense rays, with a UV Index of 8, categorized as very high. This suggests that, despite the arrival of autumn, sun protection remains crucial, with a burn time of just 15 minutes for unprotected skin. Building on the high readings from the peak summer months, where the UV Index reached its maximum at 10, the decrease to 8 indicates a slight decline but emphasizes that vigilance is still necessary. As outdoor activities draw people to enjoy the mild weather, it's wise to stay informed about the UV levels to ensure both safety and enjoyment in the sun. For more detailed seasonal insights, check the Gettysburg UV Index.
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As summer's warmth gently transitions into the crisp embrace of autumn, September in Gettysburg showcases a remarkable 272 hours of sunshine—a vibrant reminder of the lingering summer days. This month continues to bask in the sun’s golden rays, although the hours of sunlight begin to taper off compared to the peak of summer in July, which boasts an impressive 350 hours. The trend through the year reveals a steady increase in sunshine from January's chilly 140 hours to the sun-soaked heights of June and July, before gradually descending as fall sets in. September’s sunny disposition, still robust compared to the onset of winter, encapsulates the beauty of seasonal change, encouraging outdoor exploration and reflection in this historic town.
September in Gettysburg boasts a 51% chance of sunny weather, marking a notable increase in sunshine compared to the summer months where the probabilities hover around 36-50%. As the season transitions into autumn, this late summer sun offers a delightful respite, making September one of the more favorable months for outdoor activities. Interestingly, this sunny likelihood slightly outpaces the average in both April and May, suggesting that those looking to explore Gettysburg’s rich history and stunning landscapes might find September to be a particularly rewarding time for a visit. With cooler temperatures on the horizon, the blend of sunny days and mild weather enhances the charm of this historical destination, inviting visitors to seize the day outdoors.
As September unfolds in Gettysburg, daylight begins to wane, offering approximately 12 hours of sunlight each day. This marks a gentle transition from the summer's peak of 14 hours in June, July, and August, down to the more subdued quantities experienced in October and November. The gradual decrease from the vibrant, sunlit days of summer speaks to the changing seasons; as nature prepares for autumn, the softening light creates a serene ambiance, inviting residents and visitors alike to savor the shifting landscape. With each passing day, the evenings draw nearer, encouraging cozy get-togethers under the fading sunlight and a deeper appreciation for the beauty of the season.
In September, the winds in Gettysburg pick up slightly from the summer lull, averaging around 2.6 m/s (6 mph). This gentle breeze offers a refreshing transition from the sweltering heat of August, which recorded its lowest wind speeds of the year at 1.8 m/s (4 mph). As autumn approaches, the winds remain steady, mirroring the patterns of October and November, which also maintain an average of 2.6 m/s and 2.8 m/s, respectively. This trend showcases a slight uptick in gusts as the season shifts, providing a pleasant backdrop to the historical landscape, where the whispers of the past seem to intertwine with the rustling leaves.
The weather in Gettysburg changes throughout the year, offering a unique experience in each season. Below is a month-by-month comparison of September'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.
September and January present strikingly different weather characteristics. In September, temperatures range from a cool 4°C (39°F) at night to a warm 34°C (93°F) during the day, with an average of 21°C (70°F). The month experiences about 118 mm (4.6 in) of rainfall over 9 days, paired with a humidity level of 75%, making it generally warm and somewhat muggy. In contrast, January offers a much colder climate, with temperatures dropping to a minimum of -17°C (2°F) and peaking at 20°C (68°F), with an average temperature of just 1°C (34°F). Precipitation is less frequent at 62 mm (2.4 in) over 8 days, but the humidity is higher at 84%, contributing to the crisp, frosty atmosphere. For those interested in specifics, you can find more details about the winter conditions at Gettysburg weather in January.
September and February present contrasting weather conditions, reflecting the transition between late summer and late winter. In September, temperatures can range from a refreshing 4°C (39°F) at night to a sweltering 34°C (93°F) during the day, with an average of 21°C (70°F). This month also experiences significant humidity at 75% and a total precipitation of 118 mm (4.6 in) over about 9 days. In contrast, February sees much cooler temperatures, with nighttime lows plunging to -17°C (2°F) and daytime highs reaching only 27°C (80°F), leading to an average temperature of just 3°C (38°F). Although February has slightly lower total precipitation at 97 mm (3.8 in) over 11 days, the humidity is noticeably higher at 83%, contributing to an overall chill in the air. For a detailed look at February weather specifics, visit Gettysburg weather in February.
September and March present quite contrasting weather conditions. In September, temperatures range from a pleasant 4°C (39°F) at night to a warm 34°C (93°F) during the day, with an average of 21°C (70°F). The month sees about 118 mm (4.6 in) of rainfall over 9 days, with humidity at a moderate 75%. In stark contrast, March experiences much colder temperatures, dipping as low as -14°C (7°F) and averaging only 6°C (44°F), while reaching a maximum of 25°C (78°F). This month also sees a bit more precipitation, at 94 mm (3.7 in) over 11 days, but with higher humidity levels at 83%. For more specific details, you can check Gettysburg weather in March.
In comparing the weather of September and April, September tends to be warmer with average temperatures hovering around 21°C (70°F) and maximums reaching up to 34°C (93°F). In contrast, April's temperatures are milder, with averages of 12°C (54°F) and highs peaking at 30°C (86°F). While September experiences slightly more precipitation at 118 mm (4.6 in) over 9 days, April is not far behind with 98 mm (3.9 in) across 12 days, indicating a wetter month despite warmer conditions in September. Additionally, humidity levels are consistently high in both months, with September at 75% and April at 81%. For more detailed insights, you can explore Gettysburg weather in April.
September and May offer distinct weather patterns, each bringing its own charm. In September, temperatures range from a cooler minimum of 4°C (39°F) to an average of 21°C (70°F) and a maximum of 34°C (93°F), making it feel quite warm. The month experiences about 118 mm (4.6 in) of precipitation over approximately 9 days, with humidity levels around 75%. In contrast, May starts a bit chillier, with minimum temperatures hitting 0°C (33°F) and an average of 18°C (64°F), reaching a comfortable maximum of 32°C (91°F). Precipitation in May is slightly higher at 132 mm (5.2 in) over about 14 days, with humidity also a bit higher at 78%. For a detailed look at the weather in May, you can visit Gettysburg weather in May.
When comparing the weather of September and June, we find some interesting similarities and differences. Both months experience high temperatures, with June averaging around 22°C (73°F) and September at 21°C (70°F). However, September tends to have slightly lower minimum temperatures at 4°C (39°F) compared to June's 8°C (47°F). Precipitation levels are relatively close, with September receiving 118 mm (4.6 in) over 9 days, while June has 103 mm (4.1 in) over a slightly higher number of days at 12. Humidity also plays a role; September has an average humidity of 75%, while June is somewhat more humid at 79%. For more details on the climate, you can view the Gettysburg weather in June.
In July, temperatures are generally warmer, with average highs of 25°C (78°F) and maximums reaching up to 36°C (97°F). The month experiences relatively high humidity at 74% and slightly more precipitation, totaling 134 mm (5.3 in) over approximately 12 days. In contrast, September offers a wider temperature range, with minimums dipping to 4°C (39°F) and average highs of 21°C (70°F), while still reaching a maximum of 34°C (93°F). The humidity remains similar at 75%, but the month sees slightly less rainfall, totaling 118 mm (4.6 in) over 9 days. For a more detailed look at the conditions in July, you can visit Gettysburg weather in July.
In comparing the weather of September to August, we notice a significant decrease in minimum temperatures, with September's lows dipping to 4°C (39°F) compared to August's 13°C (56°F). While the average temperature in September is slightly lower at 21°C (70°F) than August's 24°C (76°F), it still reaches similar maximum temperatures, peaking at 34°C (93°F) in September versus 36°C (97°F) in August. Both months receive comparable amounts of precipitation, with September recording 118 mm (4.6 in) over 9 days and August similar at 118 mm (4.7 in) across 14 days. Notably, September exhibits a higher humidity level at 75% in contrast to August's 72%. For more insights on August weather, you can visit Gettysburg weather in August.
In comparing the weather between September and October, September experiences milder average temperatures, ranging from a minimum of 4°C (39°F) to a maximum of 34°C (93°F), with an average of 21°C (70°F). The month sees significant rainfall, totaling 118 mm (4.6 in) over about 9 days, accompanied by a humidity level of 75%. In contrast, October brings cooler temperatures, featuring a minimum of 1°C (33°F) and an average of 15°C (60°F), while still reaching the same maximum of 34°C (93°F). Rainfall decreases slightly to 100 mm (3.9 in) over 10 days, with humidity increasing to 81%. For more specific details, check out Gettysburg weather in October.
September and November present contrasting weather patterns. In September, temperatures range from a comfortable minimum of 4°C (39°F) to a sweltering maximum of 34°C (93°F), with an average of 21°C (70°F). The month sees about 118 mm (4.6 in) of precipitation over 9 days and maintains a humidity level of 75%. In stark contrast, November experiences much cooler weather, with temperatures dropping to a minimum of -6°C (21°F) and averaging just 7°C (45°F), while highs reach a mild 24°C (76°F). Precipitation decreases to 86 mm (3.4 in) over 7 days, and humidity increases to 85%. For more details on how November weather specifically affects the area, you can check Gettysburg weather in November.
September and December present a stark contrast in weather conditions. In September, temperatures typically range from a mild 21°C (70°F) on average, peaking at a hot 34°C (93°F) on some days, accompanied by significant humidity levels at 75%. This month also sees an average of 118 mm (4.6 in) of precipitation over nine days. In contrast, December brings a much colder climate, with average temperatures dropping to just 3°C (38°F), and falling as low as -13°C (10°F) at night. Although December receives slightly less precipitation at 92 mm (3.6 in), the humidity rises to 84%, creating a chillier atmosphere. For more details on what to expect, check out Gettysburg weather in December.
In September, Gettysburg experiences a transition towards cooler temperatures, with pleasant days averaging around 21°C (70°F), while the highs can still reach up to 34°C (93°F). Unlike the hot summer months, this month brings a noticeable drop in temperature with the nights dipping to a refreshing 4°C (39°F). Humidity levels often linger around 75%, contributing to a muggier feel, but it's the consistent precipitation—averaging 118 mm over about nine days—that sets September apart. This combination of mild temperatures and increased rainfall creates a unique atmosphere, making the landscape lush and inviting. For more detailed insights about weather patterns, visit Gettysburg Climate.