UTC Offset
UTC+01:00
Castletown, United Kingdom Snapshot 2026
Where is Castletown?
Castletown, United Kingdom
- Continent
- Europe
- Country
- United Kingdom
- City
- Castletown
- Population
- 840
- Coordinates
- 58.59°, -3.39°
Castletown is a city in United Kingdom with a population of approximately 840. Average temperatures range from 3°C (38°F) in February to 16°C (60°F) in August. The best time to visit is May, June, July, August.
Time in Castletown right now
Open full time & time zone page 00:01 01
Tuesday, June 16, 2026
IANA time zone
Europe/London
Daylight saving
DST in effect
GMT / BST
Next DST change
October 25
backward -1h
Live weather in Castletown
Daylight in Castletown today
View full sunrise & sunset page Sunrise
Sunset
Day length
18h 20m
Climate normals for Castletown
Long-term monthly averages based on historical data.
January
Poor 
February
Poor March
Poor April
Poor May best
Fair June best
Fair July best
Good August best
Good September
Fair October
Poor November
Poor December
Poor | Month | Temp | Feels Like | Rain | Sun | Humidity | UV | Status | Details |
|---|---|---|---|---|---|---|---|---|
| January | 7°C / 4°C | 2°C / -2°C | 15days (69 mm) Wet | 2.9h Poor | 79% Humid | 0.6 Low | Poor | View Details |
| February | 7°C / 3°C | 2°C / -2°C | 14days (59 mm) Wet | 5.3h Fair | 78% Humid | 1.2 Low | Poor | View Details |
| March | 8°C / 4°C | 3°C / -1°C | 15days (58 mm) Wet | 7.2h Good | 78% Humid | 2.6 Moderate | Poor | View Details |
| April | 9°C / 5°C | 5°C / 1°C | 13days (53 mm) Wet | 9.8h Good | 77% Humid | 3.9 Moderate | Poor | View Details |
| May best | 12°C / 7°C | 9°C / 4°C | 14days (59 mm) Wet | 10.7h Excellent | 80% Humid | 5 Moderate | Fair | View Details |
| June best | 14°C / 10°C | 12°C / 7°C | 14days (66 mm) Wet | 11.2h Excellent | 81% Humid | 5.2 High | Fair | View Details |
| July best | 16°C / 12°C | 14°C / 9°C | 17days (83 mm) Wet | 10h Excellent | 83% Humid | 4.8 Moderate | Good | View Details |
| August best | 16°C / 12°C | 14°C / 10°C | 15days (75 mm) Wet | 9.8h Good | 82% Humid | 4.4 Moderate | Good | View Details |
| September | 14°C / 11°C | 12°C / 8°C | 17days (91 mm) Wet | 7.8h Good | 81% Humid | 3.1 Moderate | Fair | View Details |
| October | 12°C / 9°C | 8°C / 5°C | 17days (95 mm) Wet | 5.2h Fair | 80% Humid | 1.5 Low | Poor | View Details |
| November | 9°C / 6°C | 5°C / 1°C | 16days (77 mm) Wet | 3.4h Poor | 80% Humid | 0.7 Low | Poor | View Details |
| December | 8°C / 5°C | 3°C / 0°C | 16days (83 mm) Wet | 2.1h Poor | 82% Humid | 0.4 Low | Poor | View Details |
Monthly Temperatures
HighLow
Line chart showing monthly temperatures. Jan: 7°C / 4°C . Feb: 7°C / 3°C . Mar: 8°C / 4°C . Apr: 9°C / 5°C . May: 12°C / 7°C . Jun: 14°C / 10°C . Jul: 16°C / 12°C . Aug: 16°C / 12°C . Sep: 14°C / 11°C . Oct: 12°C / 9°C . Nov: 9°C / 6°C . Dec: 8°C / 5°C .
Monthly Rainfall
Rainfall
Bar chart showing monthly rainfall. Jan: 69 mm. Feb: 59 mm. Mar: 58 mm. Apr: 53 mm. May: 59 mm. Jun: 66 mm. Jul: 83 mm. Aug: 75 mm. Sep: 91 mm. Oct: 95 mm. Nov: 77 mm. Dec: 83 mm.
Monthly Humidity
Humidity
Line chart showing monthly humidity. Jan: 79%. Feb: 78%. Mar: 78%. Apr: 77%. May: 80%. Jun: 81%. Jul: 83%. Aug: 82%. Sep: 81%. Oct: 80%. Nov: 80%. Dec: 82%.
Monthly Wind Speed
Wind SpeedGusts
Bar chart showing monthly wind speed. Jan: 31 km/h . Feb: 30 km/h . Mar: 28 km/h . Apr: 25 km/h . May: 23 km/h . Jun: 23 km/h . Jul: 22 km/h . Aug: 23 km/h . Sep: 26 km/h . Oct: 29 km/h . Nov: 28 km/h . Dec: 29 km/h .
Sea Temperature
Sea Temperatureswim
Line chart showing monthly sea temperature. Jan: 9°C . Feb: 8°C . Mar: 8°C . Apr: 8°C . May: 10°C . Jun: 12°C . Jul: 14°C . Aug: 14°C . Sep: 14°C . Oct: 13°C . Nov: 11°C . Dec: 10°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 5. Jun: UV 5. Jul: UV 5. Aug: UV 4. Sep: UV 3. Oct: UV 2. Nov: UV 1. Dec: UV 0.
Frequently Asked Questions
Castletown has a population of approximately 840.
The best months to visit Castletown are May, June, July, August, when temperatures are pleasant and rainfall is lower.
Castletown receives approximately 868mm of rainfall annually across 183 rainy days.
Castletown is located in United Kingdom, in the Europe region.