September Weather in Fredericksburg, United States

Last updated: February 24, 2025

In Fredericksburg, United States, September brings a vibrant mix of warm temperatures and occasional rainfall. The month sees a maximum temperature soaring up to 37°C (99°F), with an average daily temperature resting comfortably at 23°C (73°F). However, the mornings can be quite cool, dipping to a minimum of 8°C (46°F). Rain is not uncommon, as the city experiences about 91 mm (3.6 in) of precipitation over 11 days, contributing to a humidity level of 68%. This blend of warmth and moisture creates a unique atmosphere, making September an intriguing time to explore the rich surroundings of Fredericksburg.

September Temperature in Fredericksburg

In September, Fredericksburg experiences a delightful transition from the sweltering summer heat to the crisp beginnings of autumn. Temperatures begin to moderate, with a minimum of 8°C (46°F) providing a pleasant start to the day, while the average climbs to a comfortable 23°C (73°F). The maximum can still reach up to 37°C (99°F), hinting at the lingering warmth of summer. This month showcases a perfect blend of warm days and cooler nights, making it ideal for outdoor activities and enjoying the vibrant fall foliage. As the days shorten and the air becomes crisper, September invites residents and visitors alike to embrace the changing season in all its beauty.

September Weather in Fredericksburg: Daily Temperature Highs, Lows, and Averages

The chart illustrates September temperature patterns in Fredericksburg, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends.
JanFebMarAprMayJunJulAugSepOctNovDec394348586876817873634943
Data source: Temperature data for Fredericksburg generated using information from the Copernicus Climate Change Service.
Choose your preferred temperature unit
The average of daily temperatures (24 hours) calculated across all days in the month.

September Precipitation in Fredericksburg

In September, Fredericksburg experiences a moderate level of precipitation, accumulating approximately 91 mm (3.6 in) across 11 days. This marks a slight decrease from the notably wetter month of August, which saw 148 mm (5.8 in) over 15 days. Following the trend of the summer months, September continues to deliver consistent rainfall, contributing to the region's lush landscapes. As the transition into fall begins, this moderate rainfall supports the gradual cooling temperatures while maintaining soil moisture, paving the way for the vibrant foliage that characterizes the season. Overall, while September's precipitation levels are less intense than in summer, they play a crucial role in sustaining the natural beauty and agricultural needs of the area.

September Precipitation Trends in Fredericksburg

The chart displays monthly precipitation patterns in Fredericksburg, with values for each month alongside September's data, which is highlighted for easy comparison. It shows the amount of precipitation, providing insights into how September's conditions compare to those of other months.
JanFebMarAprMayJunJulAugSepOctNovDec62907610110910991148911097788
Data source: Precipitation data for September generated using information from the Copernicus Climate Change Service.
Choose your preferred precipitation unit

September Humidity in Fredericksburg

In September, Fredericksburg experiences a noticeable shift in humidity, dropping to 68%. This marks a transitional phase as the summer months fade, showing a significant decrease from the swelter of August's 59%, following a pattern of declining humidity from the peak summer heat. Spring's higher levels, hovering around 86%, give way to a more comfortable atmosphere as the fall approaches. The trend indicates that humidity levels in Fredericksburg are at their highest in the winter and early spring, steadily decreasing through the summer and into the early fall. This gradual shift creates a refreshing respite as the season changes, preparing residents for the heavier humidity that returns in October.

September Average Humidity in Fredericksburg

This chart illustrates the average monthly humidity levels in Fredericksburg, with September's data highlighted for easy comparison. It shows the fluctuation in humidity throughout the year, allowing you to see how September's humidity levels compare to other months.
JanFebMarAprMayJunJulAugSepOctNovDec86%86%86%84%78%79%70%59%68%80%87%85%
Data source: Humidity data for September generated using information from the Copernicus Climate Change Service.

September UV Index in Fredericksburg

As summer fades into autumn, September in Fredericksburg sees a slight dip in the UV Index, registering at 8 with a very high exposure category. This marks a shift from the peak summer months, yet sun protection remains crucial with a burn time of just 15 minutes. The gradual decline from July's unrelenting intensity hints at a transition towards more moderate levels later in the year. However, the lingering strength of the sun in September still calls for vigilance. Residents and visitors should remain aware of UV exposure and take appropriate precautions to enjoy the sunny days responsibly. For detailed insights, check out the Fredericksburg UV Index.

Maximum UV Index Levels in Fredericksburg for September

The chart shows the monthly maximum UV Index (UVI) for Fredericksburg in September, representing the highest UV radiation level. The UVI measures the intensity of ultraviolet radiation from the sun, indicating the potential risk of sunburn and UV-related health issues.
JanFebMarAprMayJunJulAugSepOctNovDec357910101098753
Data source: Fredericksburg September UVI data generated using information from the Copernicus Climate Change Service.

UV Risk Categories

  •  Extreme (11+): Avoid the sun, stay in shade.
  •  Very High (8-10): Limit sun exposure.
  •  High (6-7): Use SPF 30+ and protective clothing.
  •  Moderate (3-5): Midday shade recommended.
  •  Low (0-2): No protection needed.

September Sunshine in Fredericksburg

As summer gracefully transitions into autumn, September in Fredericksburg boasts a delightful 272 hours of sunshine, reflecting a charming balance between warm days and cooler breezes. This month marks a gentle decline from the peak sunlit days of July, which enjoyed an impressive 354 hours. After basking in the summer glow, September offers a vibrant backdrop for outdoor activities, with sunlight still abundant yet beautifully tempered. Following a stellar summer, the lingering warmth invites residents to savor the splendor of early fall, before shedding into the milder october, which dips to 247 hours. As the seasons shift, Fredericksburg residents embrace the sun's golden rays, celebrating the last of summer's warmth while looking forward to the crisp elegance of autumn.

Monthly Sunshine Duration in Fredericksburg: September Highlighted

The September sunshine duration represents the total number of hours Fredericksburg experiences direct sunlight during the month of September, excluding cloudy or obstructed periods. This chart compares the sunshine duration of September with the other months of the year.
JanFebMarAprMayJunJulAugSepOctNovDec156h184h257h261h286h324h354h313h272h247h227h194h
Data source: Fredericksburg September Sunshine duration data generated using information from the Copernicus Climate Change Service.

Chance of Sun in Fredericksburg During September

September in Fredericksburg brings a delightful shift in the weather, boasting a 57% chance of sunny days—the highest probability for sunshine since May. This month often marks a transition into a more stable and pleasant climate, making it an ideal time for outdoor activities and adventures. As summer gives way to autumn, the likelihood of sunny weather continues to rise compared to the preceding months, which typically offer less sunshine. With its beautiful landscapes and welcoming temperatures, September invites residents and visitors alike to embrace the outdoors during this sun-kissed period.

Percentage of Sunny Days in September in Fredericksburg

The chart illustrates the percentage of sunny days in Fredericksburg throughout the year, with September highlighted. It highlights the variation in sunshine across each month and provides an overview of the typical frequency of sunny days, offering insights into how often Fredericksburg experiences clear skies throughout the year.
JanFebMarAprMayJunJulAugSepOctNovDec49%32%51%52%42%39%49%37%57%42%59%43%
Data source: Fredericksburg September chance of sun data, generated using information from the Copernicus Climate Change Service.

Daylight Hours in Fredericksburg in September

As summer fades into autumn, September in Fredericksburg, United States, showcases a subtle transition in daylight duration. With about 12 hours of daylight, September marks a gentle decline from the peak 14 hours enjoyed during the height of summer in June, July, and early August. This gradual reduction signals the approach of shorter days, as the vibrant energy of summer gives way to the cooler, crisp ambiance of fall. As nature transforms, the decreasing daylight invites cozy gatherings and reflective moments, reminding us to savor the fleeting sunshine before autumn fully embraces the region.

Average Daylight Hours in Fredericksburg for September

The chart illustrates the variation in daylight duration in Fredericksburg throughout the year, with September highlighted. It shows the monthly changes in daylight hours, calculated by summing the hours between sunrise and sunset.
JanFebMarAprMayJunJulAugSepOctNovDec9h 50m10h 46m11h 58m13h 12m14h 15m14h 45m14h 29m13h 33m12h 22m11h 9m10h 4m9h 32m
Data source: Fredericksburg daylight hours, calculated by summing the hours between sunrise and sunset for each day.

September Winds in Fredericksburg

As summer fades in Fredericksburg, September breezes bring a refreshing change, with an average wind speed of 2.6 m/s (6 mph). This marks a slight uptick from the quietest summer months, where winds dwindled to 1.9 m/s (4 mph) in August, suggesting a reawakening of the air as the season shifts. The fall months generally see a resurgence, as wind speeds steadily increase again in October. This gradual shift not only hints at the cooler temperatures to come but also invites a sense of renewal, making September a delightful time to experience the natural beauty of Fredericksburg as it transitions from the heat of summer to the crispness of autumn.

Average September Wind Speed in Fredericksburg

The chart displays monthly wind speed patterns in Fredericksburg, with values for each month shown alongside September's data, which is highlighted for easy comparison. It illustrates the average wind speed, offering insights into how September's wind conditions compare to the rest of the year.
JanFebMarAprMayJunJulAugSepOctNovDec2.93.23.13.22.82.62.41.92.6 m/s2.72.92.9
Data source: Fredericksburg September wind data, generated using information from the Copernicus Climate Change Service.

How September Weather in Fredericksburg Compares to Other Months

The weather in Fredericksburg 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 Fredericksburg and find detailed weather information for every month.

September and January present stark contrasts in weather patterns. In September, the temperatures can range from a mild 8°C (46°F) at night to a scorching 37°C (99°F) during the day, with an average of 23°C (73°F). This month also experiences significant rainfall, totaling 91 mm (3.6 in) over 11 days, coupled with a moderate humidity of 68%. In sharp contrast, January features much cooler temperatures, with a minimum of -15°C (6°F) and a maximum of 21°C (71°F), averaging only 4°C (39°F). The precipitation in January is less intense at 62 mm (2.4 in) over 7 days, although humidity levels rise to 86%. For more details on specific conditions during this month, check out Fredericksburg weather in January.

September and February present contrasting weather patterns in terms of temperature and humidity. September boasts a warm average temperature of 23°C (73°F), with highs reaching up to 37°C (99°F), while February's average falls significantly to 6°C (43°F), with a maximum of 26°C (80°F). Both months experience similar levels of precipitation at 90-91 mm (3.6 in), spread across 11 days, yet February tends to be more humid, with a humidity level of 86% compared to September's 68%. For a detailed look at February weather specifics, you can check Fredericksburg weather in February.

When comparing the weather between September and March, we see some notable differences. September features a much warmer average temperature of 23°C (73°F), with maximums reaching up to 37°C (99°F), while March has a cooler average of 9°C (49°F) and a maximum of only 29°C (84°F). Although September has slightly more precipitation at 91 mm (3.6 in) over 11 days, March's precipitation is also significant at 76 mm (3.0 in) across 10 days, complemented by higher humidity at 86% compared to September's 68%. For more detailed information, check Fredericksburg weather in March.

September and April exhibit notable differences in weather patterns. In September, temperatures range from a minimum of 8°C (46°F) to a maximum of 37°C (99°F), with an average of 23°C (73°F), making it generally warmer. In contrast, April sees cooler temperatures, with a minimum of -1°C (31°F) and an average of 15°C (59°F), peaking at 33°C (92°F). Both months experience significant rainfall, with September receiving 91 mm (3.6 in) over 11 days and April slightly wetter at 101 mm (4.0 in) over 10 days. Additionally, April tends to be more humid, with humidity levels reaching 84%, compared to September's 68%. For a closer look at April's weather specifics, visit Fredericksburg weather in April.

In comparing the weather between September and May, we see notable differences in temperature and precipitation. September generally enjoys warmer temperatures, with averages around 23°C (73°F) and highs reaching up to 37°C (99°F), while May has slightly cooler averages of 20°C (68°F) and maximum temperatures peaking at 35°C (95°F). Precipitation levels are also noteworthy; September experiences about 91 mm (3.6 in) of rain over 11 days, whereas May records higher rainfall at 109 mm (4.3 in) over 12 days, contributing to a more humid environment with a humidity of 78% compared to September's 68%. For a detailed look at May weather, you can visit Fredericksburg weather in May.

September weather tends to be warmer during the day, with an average temperature of 23°C (73°F) compared to June's average of 24°C (76°F). However, September features a broader temperature range, dipping to a minimum of 8°C (46°F), while June starts at a higher minimum of 12°C (53°F). Both months experience significant heat, with maximum temperatures reaching up to 37°C (99°F) in September and 37°C (98°F) in June. Precipitation is slightly higher in June, amounting to 109 mm (4.3 in) over 12 days, compared to 91 mm (3.6 in) over 11 days in September. Additionally, June tends to be more humid, with humidity levels around 79%, whereas September sees a lower humidity of 68%. For more details on June weather, visit Fredericksburg weather in June.

When comparing the weather in September and July, it is clear that September experiences a wider temperature range, with minimums dipping to 8°C (46°F) and maximums reaching up to 37°C (99°F), while July maintains a warmer average temperature of 27°C (81°F) with minimums around 16°C (61°F) and maximums peaking at 39°C (102°F). Both months receive similar precipitation levels, with September recording 91 mm (3.6 in) over 11 days and July also seeing 91 mm (3.6 in) but over just 10 days. Humidity levels are comparable as well, with September at 68% and July slightly higher at 70%. For a more detailed look at July weather, you can visit Fredericksburg weather in July.

In comparing the weather between August and September, we see notable differences in both temperature and precipitation. September experiences a wider range in temperature, with minimums dropping to 8°C (46°F) while still reaching maximums of 37°C (99°F), resulting in an average of 23°C (73°F). In contrast, August remains warmer overall, with a higher average temperature of 26°C (78°F) and maximums peaking at 38°C (100°F). Precipitation also varies, as September sees 91 mm (3.6 in) over 11 days, while August is noticeably wetter with 148 mm (5.8 in) across 15 days, contributing to a lower humidity level of 59% compared to September’s 68%. For more detailed insights, you can check out Fredericksburg weather in August.

In comparing the weather of September and October, we notice a significant drop in average temperatures. September boasts a minimum of 8°C (46°F) and an average of 23°C (73°F), while October sees a further decline, with a minimum of 3°C (38°F) and an average of 17°C (63°F). Despite a slightly warmer maximum temperature in October at 36°C (97°F), the overall feel is cooler compared to September's high of 37°C (99°F). Precipitation also increases slightly in October, reaching 109 mm (4.3 in) over 9 days, compared to September's 91 mm (3.6 in) over 11 days, and humidity rises from 68% to 80%. For more detailed information, check out Fredericksburg weather in October.

September weather is typically warm, with average temperatures reaching up to 23°C (73°F) and highs peaking at 37°C (99°F), making it one of the hotter months of the year. In contrast, November brings a significant drop in temperature, with averages falling to 9°C (49°F) and minimums dipping to -4°C (25°F). While September experiences more rainfall with 91 mm (3.6 in) over 11 days, November sees less precipitation at 77 mm (3.0 in) across 7 days. Humidity levels are also higher in November at 86% compared to September's 68%, contributing to a cooler and more overcast atmosphere. For more detailed information, you can visit Fredericksburg weather in November.

September and December present stark contrasts in weather patterns. In September, temperatures range from a mild 8°C (46°F) at night to a scorching 37°C (99°F) during the day, with an average temperature of 23°C (73°F). With 91 mm (3.6 in) of precipitation over 11 days, humidity levels hover around 68%. In contrast, December brings much colder conditions, with temperatures dipping as low as -10°C (14°F) and an average of 6°C (43°F). Despite slightly lower precipitation at 88 mm (3.5 in) over 9 days, humidity increases to 85%. For more detailed insights, check out this link: Fredericksburg weather in December.

Compare Fredericksburg's Climate with Cities Worldwide

Conclusion: What to Expect From September Weather in Fredericksburg

As September rolls in, Fredericksburg experiences a distinct shift in weather compared to the hotter summer months. The average temperatures provide a comfortable respite, with highs lowering significantly, and the evenings becoming cooler. However, September is also marked by increased humidity and the occasional rain, as evidenced by frequent precipitation across the month. With 91 mm of rain falling over approximately 11 days, it's a time when the landscape begins to refresh. This transition not only brings a break from summer's heat but also paves the way for the vibrant colors of autumn. Discover more about what to expect throughout the year in Fredericksburg by visiting Fredericksburg Climate.