Last updated: August 27, 2025
The average temperature in Mountain Ash, United Kingdom during October is a crisp 10°C (51°F). Temperatures can range from a chilly -2°C (28°F) to a pleasant 21°C (70°F). Prepare for some damp days, as the region experiences 143 mm (5.6 in) of precipitation over approximately 15 days. With an average humidity of 89%, be ready for that quintessential cozy weather!
In October in Mountain Ash, the average temperature is 10°C (51°F), with maximums reaching up to 21°C (70°F) and minimums dropping as low as -2°C (28°F). It's advisable to pack layers for your travels, as the weather can vary significantly throughout the day.
In Mountain Ash in October, the total precipitation amount is 143 mm (5.6 in) spread over 15 days.
In Mountain Ash in October humidity is 89%. With an average temperature of 10°C (51°F), this humidity feels like traveling through a thick fog, where the damp air clings to your skin, making the coolness feel even chillier and adding an element of discomfort to your adventures.
In Mountain Ash in October, the maximum UV index reaches 4, which corresponds to a moderate Exposure Category. With a time to burn of 30 minutes, it’s important to take precautions to protect your skin. You can find more details in the Hourly UV Index in Mountain Ash for better planning.
UV Risk Categories
Weather in Mountain Ash varies notably across the year, with each month offering distinct climate conditions. This page compares October’s weather to other months in Mountain Ash, focusing on differences in temperature, rainfall, humidity, and UV levels.
| Temperature | Precipitation | Humidity | UV | |
|---|---|---|---|---|
| January Weather | 4°C (40°F) | 82 mm (3.2 inches) | 88% | low |
| February Weather | 5°C (42°F) | 124 mm (4.9 inches) | 88% | low |
| March Weather | 6°C (43°F) | 111 mm (4.4 inches) | 86% | moderate |
| April Weather | 8°C (47°F) | 64 mm (2.5 inches) | 84% | high |
| May Weather | 11°C (52°F) | 93 mm (3.7 inches) | 80% | high |
| June Weather | 14°C (58°F) | 91 mm (3.6 inches) | 80% | very high |
| July Weather | 16°C (61°F) | 93 mm (3.7 inches) | 70% | very high |
| August Weather | 15°C (60°F) | 114 mm (4.5 inches) | 73% | high |
| September Weather | 13°C (56°F) | 92 mm (3.6 inches) | 79% | high |
| October Weather | 10°C (51°F) | 143 mm (5.6 inches) | 89% | moderate |
| November Weather | 7°C (45°F) | 117 mm (4.6 inches) | 90% | low |
| December Weather | 6°C (43°F) | 144 mm (5.7 inches) | 89% | low |