October Weather in St Johnston, Ireland

Last updated: August 23, 2025

In October, the average temperature in St Johnston, Ireland hovers around 10°C (50°F), with a minimum of 1°C (33°F) and a maximum reaching 19°C (67°F). Be prepared for some rain, as the area experiences about 112 mm (4.4 in) of precipitation spread across 18 days. Additionally, the average humidity is a brisk 87%, making for a refreshingly cool atmosphere.

October Temperature in St Johnston

In October in St Johnston, the average temperature is 10°C (50°F). The maximum can reach 19°C (67°F), and the minimum can be as low as 1°C (33°F). It's a great time to visit St Johnston if you enjoy mild weather and the possibility of layering your clothing.

October Weather in St Johnston: Daily Temperature Highs, Lows, and Averages

The chart illustrates October temperature patterns in St Johnston, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In St Johnston, October typically has an average temperature of 10°C (50°F), with highs reaching up to 19°C (67°F) and lows dropping to around 1°C (33°F).

Data source: Temperature data for St Johnston generated using information from the Copernicus Climate Change Service.

October Precipitation in St Johnston

In St Johnston in October, the precipitation amount is 112 mm (4.4 in) over a span of 18 days.

October Precipitation Trends in St Johnston

The chart displays monthly precipitation patterns in St Johnston, 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 St Johnston, October typically receives around 112 mm (4.4 inches) of precipitation spread over approximately 18 days.

Data source: Precipitation data for October generated using information from the Copernicus Climate Change Service.

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Millimeters (mm) Inches (in)

October Humidity in St Johnston

In St Johnston in October humidity is 87%. With an average temperature of 10°C (50°F), this humidity feels like a heavy cloak wrapping around you, making every step feel laborious and the air thick with moisture, challenging your comfort while traveling.

October Average Humidity in St Johnston

This chart illustrates the average monthly humidity levels in St Johnston, 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 St Johnston is approximately 87%, offering insight into how humid the weather typically is during this month.

Data source: Humidity data for October generated using information from the Copernicus Climate Change Service.

October UV Index in St Johnston

In St Johnston in October, the maximum UV index is 3, which corresponds to a moderate Exposure Category. The time to burn is approximately 30 minutes. For more details on the hourly UV index in St Johnston, you can check the information here.

Maximum UV Index Levels in St Johnston for October

The chart shows the monthly maximum UV Index (UVI) for St Johnston 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 St Johnston typically reaches 3, which falls under the moderate exposure category.

Data source: St Johnston 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 St Johnston Compares to Other Months

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

This table compares monthly weather conditions in St Johnston, showing how October’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
	Temperature	Precipitation	Humidity	UV
January Weather	5°C (42°F)	72 mm (2.8 inches)	84%	low
February Weather	6°C (42°F)	113 mm (4.4 inches)	84%	low
March Weather	6°C (44°F)	106 mm (4.2 inches)	83%	moderate
April Weather	8°C (47°F)	64 mm (2.5 inches)	84%	moderate
May Weather	11°C (52°F)	93 mm (3.7 inches)	83%	high
June Weather	13°C (56°F)	107 mm (4.2 inches)	83%	very high
July Weather	15°C (59°F)	99 mm (3.9 inches)	86%	very high
August Weather	15°C (58°F)	157 mm (6.2 inches)	86%	high
September Weather	13°C (55°F)	97 mm (3.8 inches)	87%	moderate
October Weather	10°C (50°F)	112 mm (4.4 inches)	87%	moderate
November Weather	7°C (46°F)	94 mm (3.7 inches)	88%	low
December Weather	6°C (43°F)	103 mm (4.1 inches)	84%	low