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September Weather in Randolph, United States

Last updated: June 24, 2025

In Randolph, United States, the average temperature in September is a comfortable 15°C (59°F), with minimums dipping to -4°C (24°F) and maximums reaching up to 30°C (87°F). Expect 79 mm (3.1 in) of precipitation over 9 days, contributing to an average humidity level of 72%. Perfect for those who enjoy a mix of mild weather and the occasional shower!

September Temperature in Randolph

In September in Randolph, the average temperature is 15°C (59°F). Maximums can reach 30°C (87°F), while minima can drop as low as -4°C (24°F). Be prepared for a diverse range of weather conditions during your travels, so pack accordingly!

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

The chart illustrates September temperature patterns in Randolph, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Randolph, September typically has an average temperature of 15°C (59°F), with highs reaching up to 30°C (87°F) and lows dropping to around -4°C (24°F).
JanFebMarAprMayJunJulAugSepOctNovDec182128415463686659473223
Data source: Temperature data for Randolph 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 Randolph

In Randolph in September, the precipitation amount is 79 mm (3.1 in) spread over 9 days.

September Precipitation Trends in Randolph

The chart displays monthly precipitation patterns in Randolph, 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 Randolph, September typically receives around 79 mm (3.1 inches) of precipitation spread over approximately 9 days.
JanFebMarAprMayJunJulAugSepOctNovDec8487811281101051501027915311293
Data source: Precipitation data for September generated using information from the Copernicus Climate Change Service.
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September Humidity in Randolph

In Randolph in September humidity is 72%. With an average temperature of 15°C (59°F), this humidity feels like a warm blanket wrapping around you, creating a sultry atmosphere that can make traveling a bit uncomfortable. The stickiness in the air can leave you feeling sluggish, so it’s advisable to stay hydrated and take breaks often while exploring.

September Average Humidity in Randolph

This chart illustrates the average monthly humidity levels in Randolph, 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 Randolph is approximately 72%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec90%88%86%84%76%72%67%64%72%81%87%85%
Data source: Humidity data for September generated using information from the Copernicus Climate Change Service.

September UV Index in Randolph

In Randolph in September, the maximum UV index is 7, which corresponds to the high Exposure Category. This means that the time to burn is approximately 25 minutes. For more detailed information, you can check the Hourly UV Index in Randolph.

Maximum UV Index Levels in Randolph for September

The chart shows the monthly maximum UV Index (UVI) for Randolph 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 Randolph typically reaches 7, which falls under the high exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec2458910997532
Data source: Randolph 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 Randolph Compares to Other Months

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

This table compares monthly weather conditions in Randolph, showing how September’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather-8°C (18°F)84 mm (3.3 inches)89%low
February Weather-6°C (21°F)87 mm (3.4 inches)88%moderate
March Weather-2°C (28°F)81 mm (3.2 inches)86%moderate
April Weather5°C (42°F)128 mm (5.0 inches)84%very high
May Weather12°C (54°F)110 mm (4.3 inches)76%very high
June Weather17°C (63°F)105 mm (4.1 inches)72%very high
July Weather20°C (68°F)150 mm (5.9 inches)66%very high
August Weather19°C (66°F)102 mm (4.0 inches)64%very high
September Weather15°C (59°F)79 mm (3.1 inches)72%high
October Weather9°C (48°F)153 mm (6.0 inches)81%moderate
November Weather0°C (33°F)112 mm (4.4 inches)87%moderate
December Weather-5°C (23°F)93 mm (3.7 inches)84%low

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