As of 19:37 BST

Weather in Griffydam

+26°

Griffydam, Saturday, 8 August, 19:37

Overcast. Feels like 25°C. High 27°C, low 10°C.

Pressure1015 mb

Wind8 mph SW

Humidity30%

Visibility6.2 mi

Dew point7°C

Detailed hourly forecast

Sun, 09+14 ° /29 °

+29 °

Griffydam, Sunday, 9 August

Partly cloudy. High 29°C, low 14°C.

Pressure1014 mb

Wind10 mph W

Humidity26%

Visibility6.2 mi

Dew point5°C

Mon, 10+12 ° /25 °

+25 °

Griffydam, Monday, 10 August

Overcast. High 25°C, low 12°C.

Pressure1020 mb

Wind11 mph NW

Humidity31%

Visibility6.2 mi

Dew point4°C

Tue, 11+11 ° /28 °

+28 °

Griffydam, Tuesday, 11 August

Clear sky. High 28°C, low 11°C.

Pressure1025 mb

Wind9 mph SE

Humidity36%

Visibility6.2 mi

Dew point8°C

Wed, 12+12 ° /32 °

+32 °

Griffydam, Wednesday, 12 August

Overcast. High 32°C, low 12°C.

Pressure1023 mb

Wind9 mph S

Humidity25%

Visibility6.2 mi

Dew point6°C

Thu, 13+16 ° /37 °

+37 °

Griffydam, Thursday, 13 August

Clear sky. High 37°C, low 16°C.

Pressure1017 mb

Wind16 mph SW

Humidity13%

Visibility—

Dew point0°C

Fri, 14+18 ° /30 °

0.1

+30 °

Griffydam, Friday, 14 August

Light rain. High 30°C, low 18°C.

Pressure1015 mb

Wind13 mph NW

Humidity36%

Visibility—

Dew point12°C

Sat, 15+15 ° /24 °

0.2

+24 °

Griffydam, Saturday, 15 August

Light rain. High 24°C, low 15°C.

Pressure1017 mb

Wind7 mph E

Humidity59%

Visibility—

Dew point13°C

Sun, 16+16 ° /24 °

4.4

+24 °

Griffydam, Sunday, 16 August

Light rain. High 24°C, low 16°C.

Pressure1013 mb

Wind6 mph SE

Humidity56%

Visibility—

Dew point13°C

Mon, 17+13 ° /21 °

+21 °

Griffydam, Monday, 17 August

Light rain. High 21°C, low 13°C.

Pressure1011 mb

Wind15 mph NW

Humidity59%

Visibility—

Dew point12°C

Tue, 18+11 ° /20 °

0.7

+20 °

Griffydam, Tuesday, 18 August

Light rain. High 20°C, low 11°C.

Pressure1009 mb

Wind17 mph NW

Humidity50%

Visibility—

Dew point8°C

Wed, 19+11 ° /24 °

+24 °

Griffydam, Wednesday, 19 August

Overcast. High 24°C, low 11°C.

Pressure1012 mb

Wind7 mph N

Humidity39%

Visibility—

Dew point6°C

Thu, 20+14 ° /19 °

1.2

+19 °

Griffydam, Thursday, 20 August

Light rain. High 19°C, low 14°C.

Pressure1005 mb

Wind15 mph NW

Humidity75%

Visibility—

Dew point13°C

Fri, 21+11 ° /20 °

0.1

+20 °

Griffydam, Friday, 21 August

Light rain. High 20°C, low 11°C.

Pressure1011 mb

Wind19 mph NW

Humidity43%

Visibility—

Dew point5°C

Sat, 22+13 ° /19 °

2.5

+19 °

Griffydam, Saturday, 22 August

Light rain. High 19°C, low 13°C.

Pressure1011 mb

Wind22 mph NW

Humidity45%

Visibility—

Dew point6°C

Sun, 23+12 ° /19 °

+19 °

Griffydam, Sunday, 23 August

Overcast. High 19°C, low 12°C.

Pressure1020 mb

Wind19 mph NW

Humidity43%

Visibility—

Dew point5°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 Griffydam 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 Griffydam 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.