Climate for Station: Heathrow, Greater London, United Kingdom
Loading live weather…
Station Statistics
10-Year Trend
High: +1.41 °C/decade
Low: +0.33 °C/decade
Rain: +0.29 mm/decade
25-Year Trend
High: +0.54 °C/decade
Low: +0.62 °C/decade
Rain: -0.13 mm/decade
50-Year Trend
High: +0.43 °C/decade
Low: +0.30 °C/decade
Rain: +0.00 mm/decade
All-Time Trend
High: +0.34 °C/decade
Low: +0.24 °C/decade
Rain: +0.00 mm/decade
Percentage Above-Average Days
Last 12 Months: 60.3%
This Year: 25.0%
Precipitation Concentration Index (PCI) ℹ️
Last 12 Months: 9.1
Historical Average: 12.6
Percentile Rank of Last 12 Months ℹ️
High: 95th percentile
Low: 91st percentile
Rain: 33rd percentile
Change in Variance ℹ️
High: +5.8%
Low: -3.0%
Intraday: +0.9%
Data Coverage
78.5%
First Year of Data
1959
Station Location
Weather Records
| Max High | Avg High | Min High | Max Avg | Avg Avg | Min Avg | Max Low | Avg Low | Min Low | Max Precipitation | Avg Precipitation | Max Snow | Avg Snow | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Record | 40.2 °C | — | -6.1 °C | 29.8 °C | — | -7.4 °C | 22.2 °C | — | -12.0 °C | 49.0 mm | — | — | — |
| January | 16.0 °C | 7.7 °C | -6.1 °C | 13.7 °C | 5.1 °C | -7.4 °C | 12.5 °C | 2.0 °C | -9.6 °C | 27.9 mm | 1.9 mm | — | — |
| February | 20.0 °C | 8.4 °C | -3.9 °C | 13.9 °C | 5.3 °C | -6.0 °C | 12.2 °C | 2.1 °C | -10.4 °C | 32.5 mm | 1.6 mm | — | — |
| March | 23.4 °C | 11.1 °C | 0.1 °C | 15.9 °C | 7.2 °C | -2.6 °C | 11.5 °C | 3.6 °C | -8.7 °C | 38.6 mm | 1.6 mm | — | — |
| April | 27.9 °C | 14.2 °C | 3.3 °C | 20.0 °C | 9.5 °C | 2.2 °C | 13.5 °C | 5.3 °C | -2.4 °C | 35.1 mm | 1.5 mm | — | — |
| May | 31.7 °C | 17.7 °C | 7.0 °C | 23.0 °C | 13.0 °C | 3.8 °C | 17.5 °C | 8.5 °C | -5.0 °C | 30.0 mm | 1.6 mm | — | — |
| June | 35.0 °C | 21.1 °C | 10.6 °C | 28.2 °C | 16.2 °C | 8.1 °C | 21.0 °C | 11.6 °C | 0.0 °C | 39.9 mm | 1.7 mm | — | — |
| July | 40.2 °C | 23.3 °C | 14.0 °C | 29.8 °C | 18.3 °C | 11.3 °C | 22.2 °C | 13.8 °C | 5.6 °C | 39.1 mm | 1.5 mm | — | — |
| August | 37.9 °C | 22.8 °C | 13.3 °C | 28.3 °C | 17.9 °C | 11.3 °C | 21.8 °C | 13.5 °C | 0.0 °C | 48.0 mm | 1.7 mm | — | — |
| September | 33.0 °C | 19.7 °C | 10.6 °C | 25.6 °C | 15.2 °C | 7.0 °C | 19.7 °C | 11.1 °C | -1.8 °C | 49.0 mm | 1.8 mm | — | — |
| October | 28.8 °C | 15.4 °C | 6.0 °C | 20.4 °C | 11.7 °C | 1.1 °C | 19.0 °C | 7.7 °C | -4.0 °C | 43.9 mm | 2.3 mm | — | — |
| November | 23.0 °C | 10.9 °C | 1.5 °C | 16.2 °C | 8.0 °C | -1.9 °C | 14.7 °C | 4.6 °C | -6.5 °C | 32.0 mm | 2.1 mm | — | — |
| December | 16.4 °C | 8.5 °C | -3.0 °C | 14.6 °C | 6.1 °C | -4.6 °C | 13.3 °C | 3.0 °C | -12.0 °C | 31.0 mm | 1.9 mm | — | — |
Plots
Current Year Climate Trends vs Historical
Max Temperature this Year | 1 of 4
Climate 12-Month Moving Averages
Max Temperature 12-Month MA | 1 of 4
Daily Average Temperatures Throughout the Year
Average Max Temperature Throughout Year | 1 of 3
