September 2025
Weather in Letchworth Garden City, day by day
Mean temperature
15.4°C
Station average 15.4°C
Highest
27.3°C
On Fri 19 Sep
Lowest
4.3°C
On Tue 23 Sep
Rain
32.8 mm
68% of the station average, 48.2 mm
Wet days
12
With 0.2 mm of rain or more
Wettest day
13.6 mm
On Wed 3 Sep
Strongest gust
27 mph
On Mon 15 Sep
Highest pressure
1028.0 hPa
Lowest 990.9 hPa
How it compares
The 9th warmest September of the 17 on record, and the warmest since 2023.
The 6th driest September of the 17 on record, and the driest since 2016.
Day by day
| Day | High | Low | Rain | Gust |
|---|---|---|---|---|
| Mon 1 | 21.1°C | 13.6°C | 2.4 mm | 16 mph |
| Tue 2 | 19.9°C | 12.2°C | 0.4 mm | 12 mph |
| Wed 3 | 20.6°C | 15.2°C | 13.6 mm | 21 mph |
| Thu 4 | 19.7°C | 13.5°C | 1.8 mm | 15 mph |
| Fri 5 | 22.2°C | 11.3°C | 0.0 mm | 9 mph |
| Sat 6 | 23.5°C | 13.7°C | 0.0 mm | 12 mph |
| Sun 7 | 25.8°C | 15.6°C | 0.0 mm | 18 mph |
| Mon 8 | 22.8°C | 13.7°C | 0.0 mm | 13 mph |
| Tue 9 | 21.3°C | 11.4°C | 0.0 mm | 11 mph |
| Wed 10 | 20.1°C | 13.4°C | 2.6 mm | 13 mph |
| Thu 11 | 19.0°C | 11.7°C | 2.8 mm | 18 mph |
| Fri 12 | 18.2°C | 10.3°C | 2.8 mm | 16 mph |
| Sat 13 | 18.0°C | 11.1°C | 0.2 mm | 14 mph |
| Sun 14 | 17.3°C | 9.3°C | 4.2 mm | 17 mph |
| Mon 15 | 19.6°C | 14.1°C | 0.0 mm | 27 mph |
| Tue 16 | 20.2°C | 12.3°C | 0.0 mm | 15 mph |
| Wed 17 | 18.6°C | 13.1°C | 1.2 mm | 17 mph |
| Thu 18 | 22.4°C | 16.9°C | 0.0 mm | 17 mph |
| Fri 19 | 27.3°C | 15.3°C | 0.0 mm | 15 mph |
| Sat 20 | 21.1°C | 13.2°C | 0.0 mm | 24 mph |
| Sun 21 | 16.7°C | 8.6°C | 0.0 mm | 13 mph |
| Mon 22 | 16.3°C | 5.3°C | 0.0 mm | 15 mph |
| Tue 23 | 17.1°C | 4.3°C | 0.0 mm | 13 mph |
| Wed 24 | 18.3°C | 7.6°C | 0.0 mm | 15 mph |
| Thu 25 | 18.6°C | 6.3°C | 0.0 mm | 15 mph |
| Fri 26 | 16.1°C | 7.2°C | 0.0 mm | 11 mph |
| Sat 27 | 18.2°C | 11.6°C | 0.0 mm | 9 mph |
| Sun 28 | 15.6°C | 9.3°C | 0.6 mm | 7 mph |
| Mon 29 | 17.7°C | 5.8°C | 0.2 mm | 5 mph |
| Tue 30 | 20.1°C | 7.4°C | 0.0 mm | 7 mph |
Weather fronts
- Likely warm front · Wed 3 Sep, 06:00
- Likely warm front · Sun 14 Sep, 17:45
- Likely cold front · Sun 14 Sep, 21:30
- Likely cold front · Sat 20 Sep, 19:30
Found automatically from this station’s readings alone, so likely rather than certain. What’s a front?
September in other years
200820092010201120122013201420152016201720182019202020212022202320242026
Rainfall up to yesterday is from the Environment Agency’s rain gauges near Letchworth: the station’s own gauge is sheltered by nearby buildings and trees and catches less than falls. Today’s is the station’s. Contains Environment Agency information © Environment Agency and/or database right, under the Open Government Licence.