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September Weather in Martinsville, United States

Last updated: June 24, 2025

In Martinsville, United States, the average temperature in September hovers around 22°C (73°F), making it a pleasant time to visit. However, be prepared for temperature fluctuations, as it can dip to a chilly 6°C (44°F) or soar to a warm 37°C (98°F). During this month, expect approximately 114 mm (4.5 in) of precipitation spread over 10 days, contributing to an average humidity of 75%. Whether you're exploring outdoors or enjoying local attractions, pack accordingly!

September Temperature in Martinsville

In September in Martinsville, the average temperature is 22°C (73°F). Maximums can reach 37°C (98°F), while minimums can drop to as low as 6°C (44°F). This diverse temperature range makes Martinsville an ideal destination for travelers seeking both warm days and cool evenings.

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

The chart illustrates September temperature patterns in Martinsville, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Martinsville, September typically has an average temperature of 22°C (73°F), with highs reaching up to 37°C (98°F) and lows dropping to around 6°C (44°F).
JanFebMarAprMayJunJulAugSepOctNovDec404550596875807772634844
Data source: Temperature data for Martinsville 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 Martinsville

In Martinsville in September, the precipitation amount is 114 mm (4.5 in) over a period of 10 days.

September Precipitation Trends in Martinsville

The chart displays monthly precipitation patterns in Martinsville, 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 Martinsville, September typically receives around 114 mm (4.5 inches) of precipitation spread over approximately 10 days.
JanFebMarAprMayJunJulAugSepOctNovDec731096913012582649211411478102
Data source: Precipitation data for September generated using information from the Copernicus Climate Change Service.
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September Humidity in Martinsville

In Martinsville in September humidity is 75%. With an average temperature of 22°C (73°F), this humidity feels like a warm, enveloping embrace, making it essential for travelers to stay hydrated and wear light, breathable clothing to enjoy their adventures comfortably.

September Average Humidity in Martinsville

This chart illustrates the average monthly humidity levels in Martinsville, 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 Martinsville 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 Martinsville

In Martinsville 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 Martinsville.

Maximum UV Index Levels in Martinsville for September

The chart shows the monthly maximum UV Index (UVI) for Martinsville 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 Martinsville typically reaches 9, which falls under the very high exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec3689101110109853
Data source: Martinsville 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 Martinsville Compares to Other Months

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

This table compares monthly weather conditions in Martinsville, showing how September’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather4°C (40°F)73 mm (2.9 inches)84%moderate
February Weather7°C (45°F)109 mm (4.3 inches)84%high
March Weather10°C (50°F)69 mm (2.7 inches)84%very high
April Weather15°C (60°F)130 mm (5.1 inches)82%very high
May Weather20°C (68°F)125 mm (4.9 inches)82%very high
June Weather24°C (75°F)82 mm (3.2 inches)83%extreme
July Weather26°C (80°F)64 mm (2.5 inches)79%very high
August Weather25°C (78°F)92 mm (3.6 inches)77%very high
September Weather22°C (73°F)114 mm (4.5 inches)75%very high
October Weather17°C (63°F)114 mm (4.5 inches)81%very high
November Weather9°C (49°F)78 mm (3.1 inches)87%moderate
December Weather7°C (44°F)102 mm (4.0 inches)85%moderate

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