Last updated: February 24, 2025
In September, Lafayette, United States, experiences a dynamic weather pattern characterized by a warm average temperature of 26°C (80°F), peaking at a sizzling 36°C (96°F). As summer transitions into fall, daytime heat is frequently tempered by cooler nights, with temperatures dipping to a refreshing 13°C (56°F). The month sees significant rainfall, accumulating 117 mm (4.6 in) over approximately 14 days, resulting in a humidity level that averages around 79%. This blend of warmth and moisture fosters a lush environment, making Lafayette's September a unique and inviting time for outdoor activities.
As September rolls into Lafayette, the temperatures begin to reflect the transition towards autumn. With minimums around 13°C (56°F) and a pleasant average of 26°C (80°F), the month offers a welcome respite from the sweltering summer heat. Highs peak at about 36°C (96°F), which still hints at the lingering warmth, but overall, it's a time when the days start to cool down, making it an ideal season for outdoor activities. The gradual decline in temperatures from the scorching heights of July and August signifies the approaching fall, offering residents and visitors a taste of crisp air and vibrant foliage ahead.
In September, Lafayette experiences a notable transition in weather patterns, with precipitation totaling 117 mm (4.6 in) over approximately 14 days. This month sees a moderate drop in rainfall when compared to the heavier downpours of the preceding summer, particularly August's 163 mm (6.4 in) over 19 days. The consistent rainfall through the summer months leads into September's more balanced climate, marking a slight decline while still maintaining a steady rhythm of rainy days. As autumn approaches, the weather in Lafayette remains dynamic, offering a blend of lingering summer humidity and the crispness of fall, making September a unique climatic bridge in the yearly cycle.
September in Lafayette, United States, experiences a consistent humidity level of 79%, maintaining the trend established over the summer months. While slightly elevated compared to the drier October that follows, September's humidity reflects a gradual decrease from the early peak of 83% in January and February. The transition into fall brings a notable dip from the summer's higher averages, yet it remains comfortably humid, setting the stage for the increased moisture levels seen in the following months of November and December. This moderate humidity allows for a pleasant blend of warmth and comfort, hallmarking early autumn in this region.
As summer fades into fall, the UV Index in Lafayette, United States, remains notably high in September, registering at 10 on the scale, which indicates a very high exposure risk. This trend reflects the tail end of an intense summer season, where the index peaked at 12 from June to August. Consequently, typical burn time decreases significantly during these months; in September, it stretches to about 15 minutes. As we transition into the autumn months, the UV Index shows a gradual decline, dipping to 9 in October. Overall, it's essential to stay vigilant about sun protection during September, and you can monitor the changing UV levels throughout the year by visiting Lafayette UV Index.
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In September, Lafayette basks in a delightful 279 hours of sunshine, marking a gentle transition from the sun-drenched days of summer. As the summer months shine brightly—peaking in July and August with 316 and 313 hours respectively—September begins to ease into the crispness of fall, yet still offers ample daylight. This month reflects a noticeable dip from the summer highs but remains robust compared to the other months of the year, especially when juxtaposed with the earlier winter months. With each passing day featuring less light, residents savor these sunny days, preparing for the cozier vibes of autumn ahead.
In Lafayette, the likelihood of sunny weather in September is promising, with a 48% chance of sunshine gracing the skies. As summer fades, September stands as a transitional month, slightly edging above the averages of the previous months. This increase in sunshine probability hints at a shift towards clearer days, making September one of the more favorable times to enjoy outdoor activities. Looking ahead, the forecast continues to brighten with October boasting an even higher 53% chance, suggesting that the delightful days of autumn are just around the corner.
As summer transitions into fall, September's daylight duration in Lafayette, United States, reflects a gentle decline, offering about 12 hours of sunshine each day. This month marks a notable shift from the peak brightness of June's 14 hours, creating a more moderate and comfortable atmosphere. While daylight begins to wane, the lingering warmth of summer still graces the days, allowing residents to enjoy outdoor activities before the crispness of autumn sets in. The gradual decrease in daylight, following the consistent 13 hours observed in July and August, highlights the cyclical rhythm of the seasons, as Lafayette prepares for the shorter days of October and the enveloping embrace of winter’s return.
As September rolls into Lafayette, residents experience a noticeable shift in the wind patterns, with an average speed of 2.5 m/s (5 mph). Compared to the breezier spring months, where winds hover around 3.7 to 3.9 m/s (8 to 9 mph), September offers a gentle sigh of calm that marks the transition to fall. This decrease in wind speed continues the trend observed during the summer, particularly in July and August, when the winds dipped to their lowest averages of 1.9 m/s (4 mph) and 2.3 m/s (5 mph), respectively. However, as autumn approaches, Lafayette can expect the winds to gradually pick up again in October, hinting at the seasonal shifts ahead. Overall, September's mild winds create a perfect backdrop for enjoying the changing scenery, while also providing a transition to the more dynamic winds of the coming months.
The weather in Lafayette 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 Lafayette and find detailed weather information for every month.
September and January present contrasting weather conditions. In September, temperatures range from a mild 13°C (56°F) to a warm 36°C (96°F), with an average of 26°C (80°F). The month experiences significant rainfall, totaling 117 mm (4.6 in) over 14 days and a humidity level of 79%. In stark contrast, January sees much cooler temperatures, with a minimum of -9°C (16°F), an average of 12°C (53°F), and a maximum of 28°C (83°F). Despite receiving slightly less precipitation at 100 mm (3.9 in) over 9 days, January boasts a higher humidity level of 83%. For more detailed information on January weather, visit Lafayette weather in January.
In September, the weather tends to be warm and humid, with average temperatures reaching 26°C (80°F) and highs soaring to 36°C (96°F). The month also sees significant rainfall, with about 117 mm (4.6 in) of precipitation over 14 days, creating a humid environment at 79% humidity. In contrast, February experiences much cooler temperatures, with averages around 15°C (59°F) and daytime highs of 28°C (83°F). Although February has slightly less precipitation at 104 mm (4.1 in) over 13 days, the humidity remains relatively high at 83%. For a closer look at February conditions, explore Lafayette weather in February.
When comparing the weather in September and March, there are notable differences in temperature and precipitation. September typically experiences warmer conditions, with average temperatures ranging from a minimum of 13°C (56°F) to a maximum of 36°C (96°F), while March sees a cooler climate with temperatures ranging from -1°C (31°F) to a maximum of 30°C (86°F). Additionally, September has higher precipitation levels, averaging 117 mm (4.6 in) over 14 rainy days, compared to March's 73 mm (2.9 in) over 11 days. Both months exhibit similar humidity levels, with September at 79% and March at 80%. For more details on March weather specifically, you can check Lafayette weather in March.
Comparing the weather in September and April reveals notable differences. September tends to be warmer with average temperatures peaking at 26°C (80°F) and maximums reaching as high as 36°C (96°F), while April has a cooler average temperature of 20°C (69°F) and maximum temperatures of 33°C (91°F). In terms of precipitation, both months are relatively wet, with September receiving 117 mm (4.6 in) over 14 days, compared to April’s 137 mm (5.4 in) across 11 days. Humidity levels are similar, with September at 79% and April slightly higher at 81%. For a more detailed look at April weather, you can check this link: Lafayette weather in April.
In comparing the weather of September and May, both months exhibit warm temperatures, with September having a slightly higher average at 26°C (80°F) compared to May's 25°C (77°F). However, both months can experience maximum temperatures reaching up to 36°C (96°F). When it comes to precipitation, September sees an average of 117 mm (4.6 in) over 14 days, while May has slightly higher rainfall at 147 mm (5.8 in) across 11 days. Humidity levels are also quite similar, with September at 79% and May at 81%, indicating a generally moist atmosphere in both months. For more details on May weather specifically, check out Lafayette weather in May.
In comparing the weather of September and June, we observe a notable difference in temperature and precipitation patterns. September boasts minimum temperatures of 13°C (56°F) and average highs reaching up to 36°C (96°F), while June starts warmer with a minimum of 17°C (62°F) and an average maximum of 35°C (95°F). Both months have a similar average humidity, with September at 79% and June slightly lower at 78%. However, September experiences around 117 mm (4.6 in) of precipitation over 14 days, whereas June sees a higher rainfall of 156 mm (6.1 in) spread over 16 days. For a more detailed look at the June weather specifics, you can visit Lafayette weather in June.
When comparing the weather in September and July, September generally experiences slightly cooler temperatures with an average of 26°C (80°F), while July tends to be warmer, averaging 28°C (83°F). The max temperature in September reaches 36°C (96°F), which is just below July's peak of 38°C (101°F). Both months have high humidity levels at 79%, but July sees more rainfall, with 177 mm (7.0 in) over 18 days compared to September’s 117 mm (4.6 in) over 14 days. For more detailed information about July weather, you can visit Lafayette weather in July.
In August, the weather typically showcases warmer temperatures with minimums around 20°C (68°F) and maximums reaching up to 38°C (100°F), resulting in an average of 28°C (82°F). This month also experiences higher precipitation, with 163 mm (6.4 in) over 19 days, maintaining a humidity level of 79%. In contrast, September sees a slight drop in temperatures, with minimums at 13°C (56°F) and maximums peaking at 36°C (96°F), yielding an average of 26°C (80°F). Additionally, while September's precipitation amounts to 117 mm (4.6 in) over 14 days, it still maintains the same humidity level of 79%. For more detailed August weather information, visit Lafayette weather in August.
In comparing the weather of September and October, September is noticeably warmer, with average temperatures reaching up to 26°C (80°F) and a maximum of 36°C (96°F). Meanwhile, October sees a drop in temperatures, with an average of 23°C (73°F) and a minimum of 3°C (38°F), showcasing the transition into cooler fall weather. When it comes to precipitation, September experiences slightly higher rainfall at 117 mm (4.6 in) over 14 days, compared to October's 103 mm (4.1 in) over just 9 days. Humidity remains fairly consistent, with September at 79% and October at 77%. For more detailed information, you can check out Lafayette weather in October.
In September, the weather is characterized by warmer temperatures, with an average of 26°C (80°F) and highs reaching up to 36°C (96°F). The month sees notable precipitation, totaling 117 mm (4.6 inches) over 14 days, accompanied by a humidity level of 79%. In contrast, November experiences a significant drop in temperatures, with an average of 16°C (60°F) and highs of 29°C (85°F). Precipitation decreases as well, with 81 mm (3.2 inches) falling over 9 days, and humidity rises slightly to 85%. For a detailed look at the weather in November, you can visit Lafayette weather in November.
In September, the weather is characterized by warm temperatures, ranging from a minimum of 13°C (56°F) to a maximum of 36°C (96°F), with an average of 26°C (80°F). The month sees significant rainfall, totaling 117 mm (4.6 in) over 14 days, coupled with high humidity levels averaging 79%. In contrast, December experiences much cooler temperatures, with a minimum of -3°C (28°F) and a maximum of 29°C (84°F), averaging 14°C (57°F). While December has slightly less precipitation at 109 mm (4.3 in) over 11 days, it is marked by higher humidity at 88%. For more detailed information on Lafayette's weather during this month, you can visit Lafayette weather in December.
As September arrives in Lafayette, it marks a noticeable shift in weather patterns, blending the remnants of summer heat with increasing humidity. The temperatures can still peak at invigorating highs, but the average settles at a comfortable warmth, ideal for outdoor activities. Meanwhile, September is characterized by its share of rain, with frequent showers contributing to a feeling of lushness in the landscape. This month often stands out due to its balmy climate and substantial precipitation, presenting a unique contrast to the dry, scorching days of July and August. For a deeper understanding of the weather trends in Lafayette, make sure to check out Lafayette Climate.