As of 20:30 BST

Weather in Castletown

+15°

Castletown, Saturday, 8 August, 20:30

Overcast. Feels like 15°C. High 18°C, low 13°C.

Pressure1007 mb

Wind6 mph SW

Humidity83%

Visibility6.2 mi

Dew point13°C

Detailed hourly forecast

Sun, 09+11 ° /17 °

0.9

+17 °

Castletown, Sunday, 9 August

Light rain. High 17°C, low 11°C.

Pressure1006 mb

Wind20 mph W

Humidity64%

Visibility6.2 mi

Dew point8°C

Mon, 10+10 ° /12 °

0.3

+12 °

Castletown, Monday, 10 August

Light rain. High 12°C, low 10°C.

Pressure1020 mb

Wind20 mph NW

Humidity59%

Visibility6.2 mi

Dew point4°C

Tue, 11+9 ° /17 °

+17 °

Castletown, Tuesday, 11 August

Overcast. High 17°C, low 9°C.

Pressure1023 mb

Wind10 mph SE

Humidity78%

Visibility6.2 mi

Dew point9°C

Wed, 12+14 ° /22 °

1.3

+22 °

Castletown, Wednesday, 12 August

Light rain. High 22°C, low 14°C.

Pressure1016 mb

Wind9 mph S

Humidity58%

Visibility6.2 mi

Dew point13°C

Thu, 13+15 ° /21 °

10.9

+21 °

Castletown, Thursday, 13 August

Rain. High 21°C, low 15°C.

Pressure1016 mb

Wind12 mph NW

Humidity76%

Visibility—

Dew point16°C

Fri, 14+13 ° /17 °

4.5

+17 °

Castletown, Friday, 14 August

Light rain. High 17°C, low 13°C.

Pressure1018 mb

Wind10 mph NW

Humidity85%

Visibility—

Dew point13°C

Sat, 15+12 ° /15 °

+15 °

Castletown, Saturday, 15 August

Overcast. High 15°C, low 12°C.

Pressure1019 mb

Wind12 mph NW

Humidity78%

Visibility—

Dew point11°C

Sun, 16+11 ° /15 °

+15 °

Castletown, Sunday, 16 August

Overcast. High 15°C, low 11°C.

Pressure1018 mb

Wind10 mph SE

Humidity71%

Visibility—

Dew point10°C

Mon, 17+11 ° /15 °

5.5

+15 °

Castletown, Monday, 17 August

Rain. High 15°C, low 11°C.

Pressure1007 mb

Wind14 mph SE

Humidity82%

Visibility—

Dew point12°C

Tue, 18+12 ° /15 °

1.3

+15 °

Castletown, Tuesday, 18 August

Light rain. High 15°C, low 12°C.

Pressure1004 mb

Wind19 mph W

Humidity68%

Visibility—

Dew point9°C

Wed, 19+11 ° /16 °

3.3

+16 °

Castletown, Wednesday, 19 August

Light rain. High 16°C, low 11°C.

Pressure1003 mb

Wind14 mph W

Humidity75%

Visibility—

Dew point11°C

Thu, 20+11 ° /14 °

10.2

+14 °

Castletown, Thursday, 20 August

Rain. High 14°C, low 11°C.

Pressure1010 mb

Wind23 mph N

Humidity79%

Visibility—

Dew point10°C

Fri, 21+11 ° /14 °

13.1

+14 °

Castletown, Friday, 21 August

Rain. High 14°C, low 11°C.

Pressure1006 mb

Wind23 mph N

Humidity78%

Visibility—

Dew point8°C

Sat, 22+10 ° /14 °

1.9

+14 °

Castletown, Saturday, 22 August

Light rain. High 14°C, low 10°C.

Pressure1004 mb

Wind20 mph NW

Humidity75%

Visibility—

Dew point9°C

Sun, 23+10 ° /14 °

4.9

+14 °

Castletown, Sunday, 23 August

Light rain. High 14°C, low 10°C.

Pressure1015 mb

Wind20 mph NW

Humidity85%

Visibility—

Dew point9°C

Questions about the month ahead

How accurate is a month-long forecast?

The first 16 days come from weather models — highly reliable for the first 3–5 days, gradually less so after that. Days 17 to 30 for Castletown are built from climate averages over the last 60 years, so they show typical weather for those dates rather than a specific forecast.

What does "above average" mean?

We compare the forecast with the climate average for exactly the same calendar days, calculated from 60 years of observations. The difference shows how the coming month compares with a typical one.

Where do the 66-year records come from?

These are real historical extremes recorded in Castletown since 1960: the highest and lowest temperature for each calendar date, with the year it happened.

How often is the 30-day forecast updated?

The forecast portion refreshes every hour. The climate portion is based on long-term data and stays stable.