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September Weather in Lawrenceville, United States

Last updated: June 24, 2025

In September, the average temperature in Lawrenceville, United States hovers around 23°C (74°F). Expect a pleasant range with temperatures dipping to a minimum of 8°C (47°F) and peaking at 35°C (96°F). Be prepared for some showers, as 111 mm (4.4 in) of precipitation might grace the area over 9 days. The average humidity is a comfortable 75%, making it an ideal time to enjoy what Lawrenceville has to offer!

September Temperature in Lawrenceville

In September in Lawrenceville, the average temperature is 23°C (74°F). The maximum can reach 35°C (96°F), and the minimum can drop as low as 8°C (47°F). This variety in temperatures makes Lawrenceville a suitable destination for travelers seeking both warm days and cooler evenings.

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

The chart illustrates September temperature patterns in Lawrenceville, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Lawrenceville, September typically has an average temperature of 23°C (74°F), with highs reaching up to 35°C (96°F) and lows dropping to around 8°C (47°F).
JanFebMarAprMayJunJulAugSepOctNovDec424751616976807873645045
Data source: Temperature data for Lawrenceville generated using information from the Copernicus Climate Change Service.
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The average of daily temperatures (24 hours) calculated across all days in the month.

September Precipitation in Lawrenceville

In Lawrenceville in September, the precipitation amount is 111 mm (4.4 in) over the course of 9 days.

September Precipitation Trends in Lawrenceville

The chart displays monthly precipitation patterns in Lawrenceville, 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. In Lawrenceville, September typically receives around 111 mm (4.4 inches) of precipitation spread over approximately 9 days.
JanFebMarAprMayJunJulAugSepOctNovDec86107841061191291131441111008095
Data source: Precipitation data for September generated using information from the Copernicus Climate Change Service.
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September Humidity in Lawrenceville

In Lawrenceville in September, humidity is 75%. With an average temperature of 23°C (74°F), this humidity feels like a warm, heavy blanket wrapping around you, making it feel more sweltering than it actually is, which can be quite uncomfortable for traveling.

September Average Humidity in Lawrenceville

This chart illustrates the average monthly humidity levels in Lawrenceville, with September’s data highlighted for easy comparison. It shows the fluctuation in humidity throughout the year, helping you understand how conditions vary by season. In September, average humidity in Lawrenceville is approximately 75%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec84%84%84%82%83%83%79%77%75%81%87%85%
Data source: Humidity data for September generated using information from the Copernicus Climate Change Service.

September UV Index in Lawrenceville

In Lawrenceville in September, the maximum UV index is 9, which corresponds to a very high Exposure Category. The time to burn is just 15 minutes, so it's essential to take precautions. For detailed information, you can check the Hourly UV Index in Lawrenceville.

Maximum UV Index Levels in Lawrenceville for September

The chart shows the monthly maximum UV Index (UVI) for Lawrenceville 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. In September, the maximum UV index in Lawrenceville typically reaches 9, which falls under the very high exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec3689101111109853
Data source: Lawrenceville 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.

How September Weather in Lawrenceville Compares to Other Months

Weather in Lawrenceville varies notably across the year, with each month offering distinct climate conditions. This page compares September’s weather to other months in Lawrenceville, focusing on differences in temperature, rainfall, humidity, and UV levels.

This table compares monthly weather conditions in Lawrenceville, showing how September’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather5°C (42°F)86 mm (3.4 inches)84%moderate
February Weather8°C (47°F)106 mm (4.2 inches)84%high
March Weather11°C (51°F)84 mm (3.3 inches)84%very high
April Weather16°C (61°F)106 mm (4.2 inches)82%very high
May Weather21°C (69°F)119 mm (4.7 inches)82%very high
June Weather24°C (76°F)129 mm (5.1 inches)83%extreme
July Weather27°C (80°F)113 mm (4.4 inches)79%extreme
August Weather26°C (78°F)144 mm (5.7 inches)77%very high
September Weather23°C (74°F)111 mm (4.4 inches)75%very high
October Weather18°C (65°F)100 mm (3.9 inches)81%very high
November Weather10°C (51°F)80 mm (3.2 inches)87%moderate
December Weather7°C (46°F)95 mm (3.7 inches)85%moderate

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