The temperatures in Hertfordshrie in September are usually low and can range between 12°C and 19°C.
You can expect about 3 to 8 days of rain in Hertfordshrie during the month of September. It’s a good idea to bring along your umbrella so that you don’t get caught in poor weather.
Our weather forecast can give you a great sense of what weather to expect in Hertfordshrie in September 2025.
If you’re planning to visit Hertfordshrie in the near future, we highly recommend that you review the 14 day weather forecast for Hertfordshrie before you arrive.