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

Heavy Rain Shower

17°C 63°F 11°C 52°F Westerly
18km/h 11mph
Friday

Sunny Intervals

17°C 63°F 10°C 50°F West North Westerly
19km/h 12mph
Saturday

Sunny

17°C 63°F 9°C 48°F West North Westerly
19km/h 12mph
Sunday

Light Cloud

16°C 61°F 14°C 57°F Southerly
19km/h 12mph
Monday

Heavy Rain Shower

19°C 66°F 15°C 59°F South Westerly
23km/h 14mph

IN ASSOCIATION WITH

Forecast

Sunrise 06:07 Sunset 20:24

Last updated 08:13

Weather forecast details for Thursday 21 August. Each column contains hourly forecast details for weather conditions, temperature, wind speed, wind direction, humidity, visibility and pressure.
Time 1000 hours1300 hours1600 hours1900 hours2200 hours0100 hours
Fri
0400 hours 
Weather Conditions Light Rain Light Rain Shower Light Rain Shower Light Rain Shower Light Rain Shower Heavy Rain Clear Sky  
Temperature (°C/°F) 12°C 54°F 15°C 59°F 16°C 61°F 14°C 57°F 14°C 57°F 13°C 55°F 12°C 54°F  
Wind Speed (mph/km/h) 8km/h 5mph South South Westerly 18km/h 11mph Westerly 24km/h 15mph West South Westerly 21km/h 13mph West South Westerly 13km/h 8mph Westerly 13km/h 8mph Westerly 10km/h 6mph Westerly  
Wind Direction SSW W WSW WSW W W W  
Humidity 86% 72% 73% 82% 88% 91% 92%  
Visibility (E = Excellent, VG = Very Good, G = Good, M = Moderate, P = Poor, VP = Very Poor) M VG G G G M VG  
Pressure (Millibars) 1016 1014 1013 1012 1011 1010 1009  

Wales

Forecast Summary

  • Today

    A chilly but generally bright start, with the odd shower. It is going to turn cloudier through the day as outbreaks of rain slowly spread their way southwards this afternoon. Temperatures still slightly below average for the time of year.

  • Tonight

    Most of the outbreaks of rain should clear away during the first part of the night leaving it largely dry with clear spells. A little less chilly than recent nights.

Environmental Summary

UV: 3

UK Range: 1-7

Pollution: Low

UK Range: Low to Very High

Pollen: Low

UK Range: Low to Very High

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 06:24, Thursday 21 Aug Forecast updated Monday to Friday only

UK

UK Forecast Last updated 07:48, Thursday 21 Aug

Observations

Observed at 09:00, Thursday 21 August

Light Rain Shower

13°C 55°F

11km/h 7mph Westerly

Humidity: 82%

Visibility: Very Good

Pressure: 1016mb, Falling

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