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October Weather in Herrin, United States

Last updated: June 24, 2025

In October, the average temperature in Herrin, United States hovers around 16°C (61°F). Expect a minimum of -1°C (30°F) and a maximum of 35°C (95°F), showcasing the month’s temperature variability. With an average precipitation of 114 mm (4.5 in) over just 9 days, it’s wise to prepare for some rain. The atmosphere is typically humid, with an average humidity level of 74%, adding to the overall climate experience.

October Temperature in Herrin

In October in Herrin, the average temperature is 16°C (61°F). Maximums can reach 35°C (95°F), and minimums can be as low as -1°C (30°F). Travelers should be prepared for a wide range of temperatures and pack accordingly for both warm and cool conditions.

October Weather in Herrin: Daily Temperature Highs, Lows, and Averages

The chart illustrates October temperature patterns in Herrin, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Herrin, October typically has an average temperature of 16°C (61°F), with highs reaching up to 35°C (95°F) and lows dropping to around -1°C (30°F).
JanFebMarAprMayJunJulAugSepOctNovDec363949576977807773614641
Data source: Temperature data for Herrin 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.

October Precipitation in Herrin

In Herrin in October, the precipitation amount is 114 mm (4.5 in) over the course of 9 days.

October Precipitation Trends in Herrin

The chart displays monthly precipitation patterns in Herrin, with values for each month alongside October’s data, which is highlighted for easy comparison. It shows the amount of precipitation, providing insights into how October’s conditions compare to those of other months. In Herrin, October typically receives around 114 mm (4.5 inches) of precipitation spread over approximately 9 days.
JanFebMarAprMayJunJulAugSepOctNovDec981181411421381089381741149488
Data source: Precipitation data for October generated using information from the Copernicus Climate Change Service.
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October Humidity in Herrin

In Herrin in October humidity is 74%. With an average temperature of 16°C (61°F), this humidity feels like a damp blanket wrapping around you, making traveling quite uncomfortable as the air feels thick and muggy, potentially leading to fatigue and a longing for a cool breeze.

October Average Humidity in Herrin

This chart illustrates the average monthly humidity levels in Herrin, with October’s data highlighted for easy comparison. It shows the fluctuation in humidity throughout the year, helping you understand how conditions vary by season. In October, average humidity in Herrin is approximately 74%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec86%84%84%80%82%83%80%76%75%75%85%88%
Data source: Humidity data for October generated using information from the Copernicus Climate Change Service.

October UV Index in Herrin

In Herrin in October, 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 Herrin.

Maximum UV Index Levels in Herrin for October

The chart shows the monthly maximum UV Index (UVI) for Herrin in October, 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 October, the maximum UV index in Herrin typically reaches 7, which falls under the high exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec35710111110109753
Data source: Herrin October 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 October Weather in Herrin Compares to Other Months

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

This table compares monthly weather conditions in Herrin, showing how October’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather2°C (36°F)98 mm (3.9 inches)86%moderate
February Weather4°C (39°F)118 mm (4.7 inches)84%moderate
March Weather10°C (49°F)141 mm (5.6 inches)84%high
April Weather14°C (57°F)142 mm (5.6 inches)80%very high
May Weather20°C (69°F)138 mm (5.4 inches)82%extreme
June Weather25°C (77°F)108 mm (4.2 inches)83%extreme
July Weather27°C (81°F)92 mm (3.6 inches)79%very high
August Weather25°C (78°F)81 mm (3.2 inches)76%very high
September Weather23°C (74°F)74 mm (2.9 inches)75%very high
October Weather16°C (61°F)114 mm (4.5 inches)74%high
November Weather8°C (46°F)94 mm (3.7 inches)85%moderate
December Weather5°C (42°F)88 mm (3.4 inches)88%moderate

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