nomadseason

September Weather in Martinsville, United States

Last updated: June 24, 2025

In September, the average temperature in Martinsville, United States is a pleasant 21°C (70°F). While you may enjoy the warmth, be prepared for minimum temperatures dropping to 6°C (43°F) and soaring highs of 34°C (93°F). The month sees 74 mm (2.9 in) of precipitation over approximately 6 days, contributing to an average humidity level of 69%.

September Temperature in Martinsville

In September in Martinsville, the average temperature is 21°C (70°F), with maximums reaching 34°C (93°F) and minimums dropping as low as 6°C (43°F). This makes it a great time to explore the area, as you can enjoy 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 21°C (70°F), with highs reaching up to 34°C (93°F) and lows dropping to around 6°C (43°F).
JanFebMarAprMayJunJulAugSepOctNovDec313443526473777470584237
Data source: Temperature data for Martinsville 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 Martinsville

In Martinsville in September, the total precipitation amount is 74 mm (2.9 in), spread over a period of 6 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 74 mm (2.9 inches) of precipitation spread over approximately 6 days.
JanFebMarAprMayJunJulAugSepOctNovDec8696129102131121108107741009888
Data source: Precipitation data for September generated using information from the Copernicus Climate Change Service.
Choose your preferred precipitation unit

September Humidity in Martinsville

In Martinsville in September humidity is 69%. With an average temperature of 21°C (70°F), this humidity feels like a warm embrace, making outdoor activities enjoyable but requiring occasional breaks for hydration and shade during your travels.

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 69%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec87%85%86%84%79%82%79%70%69%76%88%87%
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 8, which corresponds to a very high Exposure Category. This means that the time to burn is only 15 minutes. For more detailed information, you can refer to 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 8, which falls under the very high exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec357910111098643
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 Weather-1°C (31°F)86 mm (3.4 inches)87%moderate
February Weather1°C (34°F)96 mm (3.8 inches)85%moderate
March Weather6°C (43°F)129 mm (5.1 inches)86%high
April Weather11°C (53°F)102 mm (4.0 inches)84%very high
May Weather18°C (65°F)131 mm (5.2 inches)79%very high
June Weather23°C (74°F)121 mm (4.8 inches)82%extreme
July Weather25°C (77°F)108 mm (4.3 inches)79%very high
August Weather23°C (74°F)107 mm (4.2 inches)70%very high
September Weather21°C (70°F)74 mm (2.9 inches)69%very high
October Weather14°C (58°F)100 mm (3.9 inches)76%high
November Weather5°C (42°F)98 mm (3.8 inches)88%moderate
December Weather3°C (37°F)88 mm (3.5 inches)87%moderate

Compare Martinsville's Climate with Cities Worldwide