Large Data Set (copy)

Largest data set time period for measurements

24 hours from 0900 to 0900.

Coldest UK location based on temperature data

Leuchars with an average temperature of 12.2°C.

Warmest location worldwide

Jacksonville with an average temperature of 24.8°C.

Units of daily mean temperature

Degrees Celsius (°C) with accuracy to the nearest 0.1°C.

Maximum rainfall recorded in the UK

Heathrow with 51.6 mm on 26/08/2015.

Driest UK city

Heathrow with 1.8 mm of rainfall.

Wettest worldwide city

Jacksonville with 5.9 mm of rainfall.

Daily maximum relative humidity

Percentage of air saturated with water vapour.

Definition of visibility

The greatest horizontal distance an object can be seen in daylight.

Units for measuring pressure

Hectopascals (hPa).

Units for measuring sunshine

Hours recorded to the nearest 0.1 hour.

What indicates misty or foggy conditions?

Relative humidity greater than 95%.

What does the Beaufort scale measure?

Wind direction and speed.

Wind unit conversion

1 knot = 1.15 mph.

Warmest months in the UK

July and August.

Maximum sunshine recorded at Heathrow

15 hours of sunshine.

Coldest location outside the UK

Perth with an average temperature of 15.2°C.

Maximum wind speed recorded in the UK

Leuchars with 23 knots on 06/06/2015.

Wettest UK city

Camborne with 2.8 mm of rainfall.

Maximum wind speed worldwide

Perth with 14 knots.

Large Data Set Overview

Covers weather data collected from May to October for the years 1987 and 2015.

Locations Included

UK cities: Camborne, Heathrow, Hurn, Leeming, Leuchars; Worldwide cities: Beijing (China), Perth (Australia), Jacksonville (USA).

Temperature Data

Daily mean temperature recorded in °C, accurate to the nearest 0.1°C.

Coldest UK Location

Leuchars, with a mean temperature of 12.2°C.

Warmest UK Location

Heathrow, particularly in July with the warmest months recorded.

Temperature Change 1987 to 2015

Temperatures have increased at all locations from 1987 to 2015.

Rainfall Data Units

Measured in millimeters (mm), accurate to the nearest 0.1 mm.

Wettest UK City

Camborne, with maximum rainfall recorded.

Driest Worldwide City (Outside UK)

Beijing, with recorded rainfall as low as 2.1 mm.

Wind Measurement

Daily mean wind direction and speed measured using the Beaufort Scale.

Maximum Wind Speed UK

Leuchars recorded a maximum wind speed of 23 knots on 06/06/2015.

Humidity Indicator

Daily maximum relative humidity indicates the moisture content in the air and is represented as a percentage.

Visibility Measurement

Visibility is defined as the greatest horizontal distance an object can be seen in daylight, measured in decametres (Dm).

Pressure Units

Atmospheric pressure measured in hectopascals (hPa), with Heathrow recording maximum and minimum values in 2015.

Cloud Cover Measurement

Measured in Okta, indicating how many eighths of the sky are covered by clouds