5-day weather forecast London Sep 20, 2026
16°Weather forecast London today Sep 20, 2026: overcast, temperature from 15 °C to 19 °C.
Precipitation probability 24%. Wind up to 5 m/s (gusts 11.22 m/s). Air humidity 32–78%, atmospheric pressure 765–774 mm Hg, UV index up to 3.2.
5 days at a glance — tap a day to open it
Sunrise 06:43
Sunset 19:04
Sunset 19:04
Waxing Gibbous73% illuminated
Moonrise 17:03 · Moonset does not set today
Moonrise 17:03 · Moonset does not set today
Chart
Table
Sun, Sep 20, 2026
| Time | Weather | Temperature | Rain chance | Cloud cover | Humidity | Pressure | Wind | UV Index |
|---|---|---|---|---|---|---|---|---|
| 00:00 |  Partly cloudy | 17 °C | 8% | 25% | 73% | 765 mm Hg | WSW 257° 5 (11.22) m/s | 0 |
| 01:00 |  Overcast | 17 °C | 21% | 100% | 76% | 765 mm Hg | W 261° 4.89 (11.22) m/s | 0 |
| 02:00 | Overcast | 16 °C | 21% | 100% | 76% | 766 mm Hg | W 261° 4.61 (11.11) m/s | 0 |
| 03:00 | Overcast | 16 °C | 22% | 100% | 77% | 766 mm Hg | W 265° 4.39 (10.92) m/s | 0 |
| 04:00 |  Patchy rain possible | 16 °C | 23% (0.01 mm/hr) | 100% | 78% | 766 mm Hg | W 266° 4.31 (10.5) m/s | 0 |
| 05:00 | Patchy rain possible | 16 °C | 24% (0.01 mm/hr) | 100% | 78% | 766 mm Hg | W 278° 4 (9.19) m/s | 0 |
| 06:00 | Overcast | 15 °C | 23% | 100% | 78% | 767 mm Hg | WNW 287° 3.81 (8.92) m/s | 0 |
| 07:00 | Overcast | 15 °C | 21% | 100% | 74% | 767 mm Hg | WNW 285° 3.69 (9.11) m/s | 0 |
| 08:00 | Overcast | 15 °C | 19% | 100% | 71% | 768 mm Hg | WNW 289° 3.89 (9.31) m/s | 0.2 |
| 09:00 | Overcast | 15 °C | 15% | 100% | 62% | 769 mm Hg | WNW 298° 4.5 (8.22) m/s | 0.6 |
| 10:00 | Overcast | 16 °C | 14% | 100% | 56% | 770 mm Hg | WNW 300° 4.39 (7.42) m/s | 1.3 |
| 11:00 | Overcast | 16 °C | 12% | 100% | 51% | 770 mm Hg | NW 304° 4.61 (6.92) m/s | 1.4 |
| 12:00 | Overcast | 17 °C | 11% | 100% | 44% | 770 mm Hg | WNW 301° 4.5 (6.61) m/s | 2.2 |
| 13:00 | Overcast | 18 °C | 10% | 100% | 39% | 770 mm Hg | WNW 303° 4.61 (6.83) m/s | 3.2 |
| 14:00 | Overcast | 19 °C | 10% | 100% | 36% | 770 mm Hg | WNW 301° 4.69 (6.72) m/s | 3.2 |
| 15:00 | Overcast | 19 °C | 10% | 100% | 33% | 770 mm Hg | NW 306° 4.61 (6.53) m/s | 2.7 |
| 16:00 | Overcast | 19 °C | 10% | 100% | 32% | 771 mm Hg | NW 311° 4.19 (5.81) m/s | 1.5 |
| 17:00 |  Partly cloudy | 19 °C | 3% | 36% | 32% | 771 mm Hg | NW 314° 3.81 (5.31) m/s | 0.8 |
| 18:00 | Overcast | 19 °C | 10% | 100% | 35% | 772 mm Hg | NW 320° 3.39 (4.81) m/s | 0.2 |
| 19:00 | Overcast | 17 °C | 10% | 100% | 39% | 773 mm Hg | NW 316° 2.31 (4.64) m/s | 0 |
| 20:00 | Overcast | 17 °C | 10% | 97% | 43% | 773 mm Hg | NW 323° 1.31 (1.61) m/s | 0 |
| 21:00 | Overcast | 16 °C | 9% | 88% | 45% | 773 mm Hg | NW 306° 1 (1.11) m/s | 0 |
| 22:00 |  Cloudy | 16 °C | 8% | 80% | 47% | 773 mm Hg | NNW 336° 1.31 (1.42) m/s | 0 |
| 23:00 | Overcast | 15 °C | 12% | 100% | 50% | 774 mm Hg | NNW 346° 1.11 (1.31) m/s | 0 |
Sun, Sep 20, 2026
Frequently asked questions about the 5-day weather in London
What will the weather be like in London over the next 5 days?
Over the next 5 days in London the temperature is expected to range from about 12 to 25 °C. See the detailed hourly forecast for each of the 5 days in the charts above.
On which of the next 5 days will it rain in London?
The chance of rain in London over the next 5 days reaches 24%. Check the 5-day precipitation chart above to see exactly which days and hours bring rain.
How accurate is the 5-day weather forecast for London?
A 5-day forecast is fairly reliable: the first 2–3 days are usually very accurate, while days 4–5 may be refined. The data is updated several times a day, so check back before important plans.
Which of the next 5 days in London will be the warmest and which the coolest?
Over the next 5 days the temperature in London ranges from about 12 to 25 °C. Compare the warmest and coolest day on the temperature chart above.
Will it be windy in London over the next 5 days?
Over the next 5 days the wind in London picks up to 5 m/s. The windiest days are easy to spot on the wind chart above.
Which day of the week in London is best for a walk or a trip?
For a walk or a trip, pick the days with the lowest chance of rain (up to 24%) and light wind — easy to compare on the 5-day charts above.
How can I best use the 5-day forecast for London?
The first 2–3 days are reliable enough for firm decisions, while days 4–5 are a guide that sharpens as they approach. The forecast is updated several times a day, so check again before important plans.
Will I need an umbrella or sunscreen in London this week?
Rain reaches a 24% chance across the next 5 days, so pack something waterproof for the wettest of them — the daily strip above shows which. Today’s UV index peaks at 3.2; sunscreen is worth it from about 3 upwards.
London on the map
Data Sources & Methodology
Our weather forecasts are powered by a professional weather data provider that aggregates data from national weather services, satellite observations, radar networks, and over 80,000 weather stations worldwide. Forecast data is updated multiple times daily. We convert raw data into clear summaries — wind speed in m/s, pressure in mmHg — so you can plan your day with confidence.