As of 17:35 BST

Weather in Caernarfon

+22°

Caernarfon, Saturday, 8 August, 17:35

Overcast. Feels like 21°C. High 23°C, low 12°C.

Pressure1016 mb

Wind9 mph SW

Humidity57%

Visibility6.2 mi

Dew point13°C

Detailed hourly forecast

Sun, 09+13 ° /23 °

+23 °

Caernarfon, Sunday, 9 August

Overcast. High 23°C, low 13°C.

Pressure1015 mb

Wind8 mph SW

Humidity59%

Visibility6.2 mi

Dew point12°C

Mon, 10+10 ° /20 °

0.1

+20 °

Caernarfon, Monday, 10 August

Light rain. High 20°C, low 10°C.

Pressure1022 mb

Wind6 mph N

Humidity48%

Visibility6.2 mi

Dew point7°C

Tue, 11+11 ° /27 °

+27 °

Caernarfon, Tuesday, 11 August

Clear sky. High 27°C, low 11°C.

Pressure1023 mb

Wind8 mph SW

Humidity30%

Visibility6.2 mi

Dew point6°C

Wed, 12+17 ° /30 °

+30 °

Caernarfon, Wednesday, 12 August

Overcast. High 30°C, low 17°C.

Pressure1021 mb

Wind8 mph S

Humidity26%

Visibility6.2 mi

Dew point7°C

Thu, 13+16 ° /28 °

+28 °

Caernarfon, Thursday, 13 August

Clear sky. High 28°C, low 16°C.

Pressure1018 mb

Wind7 mph SW

Humidity32%

Visibility—

Dew point8°C

Fri, 14+16 ° /24 °

+24 °

Caernarfon, Friday, 14 August

Light rain. High 24°C, low 16°C.

Pressure1017 mb

Wind8 mph W

Humidity67%

Visibility—

Dew point16°C

Sat, 15+12 ° /22 °

+22 °

Caernarfon, Saturday, 15 August

Overcast. High 22°C, low 12°C.

Pressure1018 mb

Wind8 mph N

Humidity48%

Visibility—

Dew point9°C

Sun, 16+12 ° /22 °

+22 °

Caernarfon, Sunday, 16 August

Overcast. High 22°C, low 12°C.

Pressure1014 mb

Wind10 mph SW

Humidity46%

Visibility—

Dew point8°C

Mon, 17+12 ° /20 °

+20 °

Caernarfon, Monday, 17 August

Light rain. High 20°C, low 12°C.

Pressure1014 mb

Wind12 mph NW

Humidity77%

Visibility—

Dew point13°C

Tue, 18+13 ° /18 °

2.8

+18 °

Caernarfon, Tuesday, 18 August

Light rain. High 18°C, low 13°C.

Pressure1012 mb

Wind9 mph NW

Humidity91%

Visibility—

Dew point13°C

Wed, 19+12 ° /18 °

0.5

+18 °

Caernarfon, Wednesday, 19 August

Light rain. High 18°C, low 12°C.

Pressure1014 mb

Wind8 mph SW

Humidity67%

Visibility—

Dew point11°C

Thu, 20+14 ° /20 °

+20 °

Caernarfon, Thursday, 20 August

Light rain. High 20°C, low 14°C.

Pressure1007 mb

Wind13 mph W

Humidity88%

Visibility—

Dew point13°C

Fri, 21+13 ° /18 °

2.2

+18 °

Caernarfon, Friday, 21 August

Light rain. High 18°C, low 13°C.

Pressure1014 mb

Wind15 mph NW

Humidity59%

Visibility—

Dew point9°C

Sat, 22+14 ° /17 °

4.7

+17 °

Caernarfon, Saturday, 22 August

Light rain. High 17°C, low 14°C.

Pressure1014 mb

Wind19 mph W

Humidity73%

Visibility—

Dew point11°C

Sun, 23+12 ° /17 °

0.3

+17 °

Caernarfon, Sunday, 23 August

Light rain. High 17°C, low 12°C.

Pressure1023 mb

Wind14 mph NW

Humidity57%

Visibility—

Dew point8°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 Caernarfon 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 Caernarfon 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.