UTC Offset
UTC+01:00
Treharris, United Kingdom Snapshot 2026
Where is Treharris?
Treharris, United Kingdom
- Continent
- Europe
- Country
- United Kingdom
- City
- Treharris
- Population
- 12.4K
- Coordinates
- 51.66°, -3.31°
Treharris is a city in United Kingdom with a population of approximately 12.4K. Average temperatures range from 2°C (36°F) in January to 20°C (68°F) in July. The best time to visit is May, June, July, August, September.
Time in Treharris right now
Open full time & time zone page 19:14 14
Monday, June 15, 2026
IANA time zone
Europe/London
Daylight saving
DST in effect
GMT / BST
Next DST change
October 25
backward -1h
Live weather in Treharris
Daylight in Treharris today
View full sunrise & sunset page Sunrise
Sunset
Day length
16h 38m
Climate normals for Treharris
Long-term monthly averages based on historical data.
January
Poor 
February
Poor March
Poor April
Fair May best
Good June best
Good July best
Excellent August best
Excellent September best
Good October
Poor November
Poor December
Poor | Month | Temp | Feels Like | Rain | Sun | Humidity | UV | Status | Details |
|---|---|---|---|---|---|---|---|---|
| January | 7°C / 2°C | 4°C / -1°C | 13days (93 mm) Wet | 3.8h Poor | 90% Very Muggy | 1.1 Low | Poor | View Details |
| February | 8°C / 3°C | 4°C / -1°C | 13days (97 mm) Wet | 5h Fair | 86% Very Muggy | 1.3 Low | Poor | View Details |
| March | 10°C / 3°C | 6°C / 0°C | 15days (101 mm) Wet | 6.8h Fair | 84% Humid | 3.2 Moderate | Poor | View Details |
| April | 12°C / 5°C | 9°C / 1°C | 11days (71 mm) Wet | 9.2h Good | 78% Humid | 4.4 Moderate | Fair | View Details |
| May best | 16°C / 8°C | 14°C / 6°C | 12days (81 mm) Wet | 10.7h Excellent | 78% Humid | 5.6 High | Good | View Details |
| June best | 19°C / 11°C | 18°C / 10°C | 12days (80 mm) Wet | 10.7h Excellent | 79% Humid | 6.1 High | Good | View Details |
| July best | 20°C / 13°C | 19°C / 12°C | 13days (78 mm) Wet | 10.8h Excellent | 79% Humid | 5.5 High | Excellent | View Details |
| August best | 20°C / 13°C | 19°C / 12°C | 12days (81 mm) Wet | 9.7h Good | 81% Humid | 5 Moderate | Excellent | View Details |
| September best | 17°C / 11°C | 16°C / 10°C | 13days (104 mm) Wet | 7.5h Good | 84% Humid | 3.6 Moderate | Good | View Details |
| October | 14°C / 9°C | 12°C / 7°C | 15days (126 mm) Wet | 5.7h Fair | 87% Very Muggy | 2.3 Moderate | Poor | View Details |
| November | 10°C / 5°C | 7°C / 2°C | 13days (110 mm) Wet | 4.2h Fair | 89% Very Muggy | 1.2 Low | Poor | View Details |
| December | 8°C / 4°C | 5°C / 1°C | 15days (122 mm) Wet | 3.1h Poor | 91% Very Muggy | 0.8 Low | Poor | View Details |
Monthly Temperatures
HighLow
Line chart showing monthly temperatures. Jan: 7°C / 2°C . Feb: 8°C / 3°C . Mar: 10°C / 3°C . Apr: 12°C / 5°C . May: 16°C / 8°C . Jun: 19°C / 11°C . Jul: 20°C / 13°C . Aug: 20°C / 13°C . Sep: 17°C / 11°C . Oct: 14°C / 9°C . Nov: 10°C / 5°C . Dec: 8°C / 4°C .
Monthly Rainfall
Rainfall
Bar chart showing monthly rainfall. Jan: 93 mm. Feb: 97 mm. Mar: 101 mm. Apr: 71 mm. May: 81 mm. Jun: 80 mm. Jul: 78 mm. Aug: 81 mm. Sep: 104 mm. Oct: 126 mm. Nov: 110 mm. Dec: 122 mm.
Monthly Humidity
Humidity
Line chart showing monthly humidity. Jan: 90%. Feb: 86%. Mar: 84%. Apr: 78%. May: 78%. Jun: 79%. Jul: 79%. Aug: 81%. Sep: 84%. Oct: 87%. Nov: 89%. Dec: 91%.
Monthly Wind Speed
Wind SpeedGusts
Bar chart showing monthly wind speed. Jan: 21 km/h . Feb: 23 km/h . Mar: 22 km/h . Apr: 19 km/h . May: 18 km/h . Jun: 18 km/h . Jul: 18 km/h . Aug: 19 km/h . Sep: 19 km/h . Oct: 20 km/h . Nov: 20 km/h . Dec: 22 km/h .
Sea Temperature
Sea Temperatureswim
Line chart showing monthly sea temperature. Jan: 6°C . Feb: 7°C . Mar: 8°C . Apr: 11°C . May: 15°C . Jun: 18°C . Jul: 19°C . Aug: 20°C . Sep: 18°C . Oct: 15°C . Nov: 12°C . Dec: 8°C .
UV Index
UV Index
Bar chart showing monthly UV index. Jan: UV 1. Feb: UV 1. Mar: UV 3. Apr: UV 4. May: UV 6. Jun: UV 6. Jul: UV 6. Aug: UV 5. Sep: UV 4. Oct: UV 2. Nov: UV 1. Dec: UV 1.
Frequently Asked Questions
Treharris has a population of approximately 12.4K.
The best months to visit Treharris are May, June, July, August, September, when temperatures are pleasant and rainfall is lower.
Treharris receives approximately 1144mm of rainfall annually across 157 rainy days.
Treharris is located in United Kingdom, in the Europe region.