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October Weather in San Mateo, Peru

Last updated: August 27, 2025

In October, the average temperature in San Mateo, Peru hovers around 3°C (38°F). Expect minimums dipping to -6°C (22°F), while maximums can reach up to 13°C (55°F). With an average precipitation of 174 mm (6.8 in) spread over 29 days, you'll want to keep an umbrella handy. The air maintains an average humidity of 56%, adding a touch of briskness to the atmosphere.

October Temperature in San Mateo

In October in San Mateo, the average temperature is 3°C (38°F). The maximum can reach 13°C (55°F), while the minimum can drop as low as -6°C (22°F). It's advisable to pack warm clothing and be prepared for chilly conditions if you're traveling during this time.

October Weather in San Mateo: Daily Temperature Highs, Lows, and Averages

The chart illustrates October temperature patterns in San Mateo, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In San Mateo, October typically has an average temperature of 3°C (38°F), with highs reaching up to 13°C (55°F) and lows dropping to around -6°C (22°F).
JanFebMarAprMayJunJulAugSepOctNovDec383838383736353637373839
Data source: Temperature data for San Mateo 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 San Mateo

In San Mateo in October, the precipitation amount reached 174 mm (6.8 in) over the course of 29 days.

October Precipitation Trends in San Mateo

The chart displays monthly precipitation patterns in San Mateo, 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 San Mateo, October typically receives around 174 mm (6.8 inches) of precipitation spread over approximately 29 days.
JanFebMarAprMayJunJulAugSepOctNovDec220251291164124504459120174232244
Data source: Precipitation data for October generated using information from the Copernicus Climate Change Service.
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October Humidity in San Mateo

In San Mateo in October humidity is 56%. With an average temperature of 3°C (38°F), this humidity feels like a brisk chill that can make outdoor activities invigorating yet a bit uncomfortable, requiring warm layers to truly enjoy the sights while exploring.

October Average Humidity in San Mateo

This chart illustrates the average monthly humidity levels in San Mateo, 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 San Mateo is approximately 56%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec91%90%91%89%85%65%47%38%40%56%76%90%
Data source: Humidity data for October generated using information from the Copernicus Climate Change Service.

October UV Index in San Mateo

In San Mateo in October, the maximum UV index is 18, which corresponds to an extreme exposure category. This means that the time to burn is just 10 minutes. For more detailed information, you can check the hourly UV index in San Mateo.

Maximum UV Index Levels in San Mateo for October

The chart shows the monthly maximum UV Index (UVI) for San Mateo 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 San Mateo typically reaches 18, which falls under the extreme exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec201920181413141517182018
Data source: San Mateo 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 San Mateo Compares to Other Months

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

This table compares monthly weather conditions in San Mateo, showing how October’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather3°C (38°F)220 mm (8.7 inches)91%extreme
February Weather3°C (39°F)251 mm (9.9 inches)90%extreme
March Weather3°C (38°F)291 mm (11.5 inches)91%extreme
April Weather3°C (38°F)164 mm (6.5 inches)89%extreme
May Weather3°C (37°F)124 mm (4.9 inches)85%extreme
June Weather2°C (36°F)50 mm (2.0 inches)65%extreme
July Weather2°C (35°F)44 mm (1.7 inches)47%extreme
August Weather2°C (36°F)59 mm (2.3 inches)38%extreme
September Weather3°C (37°F)120 mm (4.7 inches)40%extreme
October Weather3°C (38°F)174 mm (6.8 inches)56%extreme
November Weather4°C (39°F)232 mm (9.1 inches)76%extreme
December Weather4°C (39°F)244 mm (9.6 inches)90%extreme

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