Met Office station record
Heathrow (London Airport) · September 2026
Heathrow (London Airport) has just had its 2nd-warmest September by day since 1948, on a figure the publisher still marks provisional.
Read from the Met Office file for this station, in the vintage we archived on 8 October 2026.
23.6
°C
mean daily maximum, September 2026
Provisional — the publisher will revise this month
The highest Septembers on record — mean daily maximum
- 1st202324.4 °C
- 2nd202623.6 °C
- 3rd194922.8 °C
- joint 4th195922.7 °C
- joint 4th200622.7 °C
- 6th201622.4 °C
- 7th202122.3 °C
- 8th200321.9 °C
- 9th202021.6 °C
- 10th201421.5 °C
- out of 79 on record
Ranked against every September this station has on record. Ties share a rank. Months with no published reading are left out of the count entirely; they are never read as zero.
Every September on record
One cell per year from 1948 to 2026, shaded from this station’s own lowest September to its highest. Years with no published reading are left blank rather than filled in.
September 2026, every metric
| Measure | Value | Rank in the record |
|---|---|---|
| mean daily maximum | 23.6 °C | 2nd-highest of 79 |
| mean daily minimum | 13.8 °C | 3rd-highest of 79 |
| days of air frost | 0 days | shared with 77 other years |
| rainfall | 26.2 mm | 21st-lowest of 79 |
| sunshine | 147.8 hours | joint 31st-highest of 70 |
The last twelve months, read across
| Measure | Oct | Nov | Dec | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Max °C | 15.8 | 12.6 | 10.4 | 8.4p | 10.7p | 13.5p | 17.8p | 21.9p | 25.1p | 29.3p | 27.5p | 23.6p |
| Min °C | 9.7 | 6.6 | 4.8 | 2.1p | 5.5p | 5.1p | 6.8p | 10.8p | 14.9p | 16.2p | 15.7p | 13.8p |
| Frost | 0 | 5 | 2 | 9p | 0p | 0p | 0p | 0p | 0p | 0p | 0p | 0p |
| Rain mm | 52.8 | 45.6 | 53.8 | 104.6p | 85.6p | 27.4p | 4.8p | 4.2p | 81.6p | 0.0p | 12.0p | 26.2p |
| Sun hrs | 70.5 | 71.7 | 67.1 | 64.7p | 35.4p | 132.4p | 223.1p | 206.3p | 207.4p | 327.3p | 257.2p | 147.8p |
October 2025 to September 2026, oldest first. * marked estimated by the publisher · p provisional, and will be revised · — not published
How these figures are read
The publisher marks estimated values with *, missing months with ---, and sunshine read by an automatic Kipp & Zonen sensor with #. Missing months are excluded from every ranking on this page; they are never read as zero. Ties share a rank.
We archive the publisher’s file verbatim every time we fetch it, so the figures above can always be checked against the exact version they were read from: data/weather-stations/raw/2026-10-08/heathrowdata.txt.