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Day Weather Maximum Day Temperature Minimum Night Temperature Wind Direction and Speed
Saturday

Partly Cloudy

17°C 63°F 9°C 48°F North Westerly
6km/h 4mph
Sunday

Light Cloud

16°C 61°F 13°C 55°F South South Westerly
11km/h 7mph
Monday

Heavy Rain

17°C 63°F 15°C 59°F South Easterly
18km/h 11mph
Tuesday

Light Cloud

19°C 66°F 13°C 55°F Easterly
24km/h 15mph
Wednesday

Light Cloud

18°C 64°F 14°C 57°F East South Easterly
21km/h 13mph

IN ASSOCIATION WITH

Forecast

Sunrise 06:10 Sunset 20:19

Last updated 20:29

Weather forecast details for Saturday 23 August. Each column contains hourly forecast details for weather conditions, temperature, wind speed, wind direction, humidity, visibility and pressure.
Time 2200 hours0100 hours
Sun
0400 hours     
Weather Conditions Clear Sky Clear Sky Partly Cloudy      
Temperature (°C/°F) 13°C 55°F 11°C 52°F 10°C 50°F      
Wind Speed (mph/km/h) 10km/h 6mph West North Westerly 6km/h 4mph North Westerly 5km/h 3mph North Westerly      
Wind Direction WNW NW NW      
Humidity 65% 76% 83%      
Visibility (E = Excellent, VG = Very Good, G = Good, M = Moderate, P = Poor, VP = Very Poor) VG VG G      
Pressure (Millibars) 1019 1020 1019      

Wales

Forecast Summary

  • This Evening and Tonight

    Temperatures will fall sharply under the influence of clearing skies and light winds through this evening, leading to a grass frost in many rural locations overnight. However, showers may affect the north coast overnight, and also southern coasts by dawn.

Environmental Summary

UV: 5

UK Range: 1-7

Pollution: Low

UK Range: Low to Very High

Pollen: Low

UK Range: Low to Very High

Met Office Warnings Issued For: Cardiff

  1. Yellow alert of rain

    From:
    0600 on Mon 25 August
    To:
    2350 on Mon 25 August
    Updated 23 August at 12:43

    Alert

    Heavy rain is expected to affect many southern areas of Britain at times during Bank Holiday Monday, with strong winds a possible additional factor close to southern coasts.

    The public should be aware that there may be some impacts to holiday traffic and other outdoor activities.

A list of all UK Warnings can be found on our More UK Weather page.

Weather Warnings Key

  • Red: Take action
  • Amber: Be prepared
  • Yellow: Be aware

Issued by the Met Office

Average Conditions

BBC Weather's average conditions for London, United Kingdom. This includes readings of average sunlight, temperature, discomfort from heat and humidity, relative humidity, average Precipitation, and wet days.
Month Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
Average Minimum Temperature (°C) 2 2 3 5 8 11 12 13 11 8 5 3
Average Minimum Temperature (°F) 35 35 38 41 46 51 54 55 51 46 41 37
Average Maximum Temperature (°C) 7 7 10 13 16 19 20 21 18 14 10 8
Average Maximum Temperature (°F) 45 45 50 56 61 68 69 69 64 58 51 46
Record Minimum Temperature (°C) -17 -9 -8 -3 -1 4 7 6 2 -3 -3 -7
Record Minimum Temperature (°F) 2 15 18 27 31 39 44 43 35 26 26 19
Record Maximum Temperature (°C) 15 16 20 24 29 31 31 33 28 25 18 15
Record Maximum Temperature (°F) 59 61 68 75 84 87 88 91 83 77 65 59
Average Precipitation (mm) 108 72 63 65 76 63 89 97 99 109 116 108
Average Precipitation (inches) 4.3 2.8 2.5 2.6 3.0 2.5 3.5 3.8 3.9 4.3 4.7 4.3
Average Sunlight Hours 2 3 4 5 6 7 6 6 5 3 2 2
Wet Days (+0.1 mm) 18 14 13 13 13 13 14 15 16 16 17 18
Relative Humidity AM 89 87 82 74 74 73 76 78 81 85 88 89
Relative Humidity PM <span class="unit-na" title="Not Available">--</span> <span class="unit-na" title="Not Available">--</span> <span class="unit-na" title="Not Available">--</span> <span class="unit-na" title="Not Available">--</span> <span class="unit-na" title="Not Available">--</span> <span class="unit-na" title="Not Available">--</span> <span class="unit-na" title="Not Available">--</span> <span class="unit-na" title="Not Available">--</span> <span class="unit-na" title="Not Available">--</span> <span class="unit-na" title="Not Available">--</span> <span class="unit-na" title="Not Available">--</span> <span class="unit-na" title="Not Available">--</span>
Discomfort From Heat And Humidity <span class="unit-na" title="Not Available">--</span> <span class="unit-na" title="Not Available">--</span> <span class="unit-na" title="Not Available">--</span> <span class="unit-na" title="Not Available">--</span> <span class="unit-na" title="Not Available">--</span> <span class="unit-na" title="Not Available">--</span> <span class="unit-na" title="Not Available">--</span> <span class="unit-na" title="Not Available">--</span> <span class="unit-na" title="Not Available">--</span> <span class="unit-na" title="Not Available">--</span> <span class="unit-na" title="Not Available">--</span> <span class="unit-na" title="Not Available">--</span>

Average Conditions data © Copyright RM, 2011. All rights reserved. Helicon Publishing is a division of RM.

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Forecast Video

BBC Wales Today

BBC Wales Today Forecast Last updated 19:03, Friday 22 Aug Forecast updated Monday to Friday only

UK

UK Forecast Last updated 17:59, Saturday 23 Aug

Observations

Observed at 19:00, Saturday 23 August

Sunny Intervals

15°C 59°F

24km/h 15mph West North Westerly

Humidity: 57%

Visibility: Excellent

Pressure: 1018mb, Rising

Observation station: St. Athan

(Lat: 51.4 | Lon: -3.433)

BBC Weather in association with the Met Office

All times are BST (Europe/London, GMT+0100) unless otherwise stated

Information given for most appropriate forecast location. See FAQs for details