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October Weather in Arma, Peru

Last updated: August 27, 2025

In October, the average temperature in Arma, Peru hovers around 5°C (40°F). You can expect minimum lows of -6°C (22°F) and highs reaching up to 12°C (54°F). During this month, precipitation totals around 175 mm (6.9 in) spread over 28 days, contributing to an average humidity of 68%.

October Temperature in Arma

In October in Arma, the average temperature is 5°C (40°F). The maximum can reach 12°C (54°F), while the minimum can be as low as -6°C (22°F). It's a great time to bundle up and enjoy the crisp, cool weather while exploring the local sights.

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

The chart illustrates October temperature patterns in Arma, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Arma, October typically has an average temperature of 5°C (40°F), with highs reaching up to 12°C (54°F) and lows dropping to around -6°C (22°F).
JanFebMarAprMayJunJulAugSepOctNovDec414141403938383939404141
Data source: Temperature data for Arma 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 Arma

In Arma in October, the precipitation amount is 175 mm (6.9 in) over a period of 28 days.

October Precipitation Trends in Arma

The chart displays monthly precipitation patterns in Arma, 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 Arma, October typically receives around 175 mm (6.9 inches) of precipitation spread over approximately 28 days.
JanFebMarAprMayJunJulAugSepOctNovDec230257277159101454258137175173217
Data source: Precipitation data for October generated using information from the Copernicus Climate Change Service.
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October Humidity in Arma

In Arma in October, humidity is 68%. With an average temperature of 5°C (40°F), this humidity feels like a damp chill that can make traveling uncomfortable, as the cold air is heavy and can penetrate your clothing, leaving you feeling clammy and cold throughout your outdoor adventures.

October Average Humidity in Arma

This chart illustrates the average monthly humidity levels in Arma, 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 Arma is approximately 68%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec89%89%90%89%83%69%56%51%53%68%82%87%
Data source: Humidity data for October generated using information from the Copernicus Climate Change Service.

October UV Index in Arma

In Arma in October, the maximum UV index reaches 19, which corresponds to an extreme exposure category. With a time to burn of just 10 minutes, it’s essential to take precautions. For detailed information, you can check the hourly UV index in Arma.

Maximum UV Index Levels in Arma for October

The chart shows the monthly maximum UV Index (UVI) for Arma 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 Arma typically reaches 19, which falls under the extreme exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec192019181512141517191919
Data source: Arma 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 Arma Compares to Other Months

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

This table compares monthly weather conditions in Arma, showing how October’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather5°C (41°F)230 mm (9.1 inches)89%extreme
February Weather5°C (41°F)257 mm (10.1 inches)89%extreme
March Weather5°C (41°F)277 mm (10.9 inches)90%extreme
April Weather5°C (41°F)159 mm (6.2 inches)89%extreme
May Weather4°C (39°F)101 mm (4.0 inches)83%extreme
June Weather3°C (38°F)45 mm (1.8 inches)69%extreme
July Weather3°C (38°F)42 mm (1.6 inches)56%extreme
August Weather4°C (39°F)58 mm (2.3 inches)50%extreme
September Weather4°C (40°F)137 mm (5.4 inches)53%extreme
October Weather5°C (40°F)175 mm (6.9 inches)68%extreme
November Weather5°C (41°F)173 mm (6.8 inches)81%extreme
December Weather5°C (41°F)217 mm (8.5 inches)87%extreme

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