Northumberland weather in September 2025

Q: How warm is it in Northumberland in September?

Daytime temperatures usually reach 16°C in Berwick-on-Tweed, Northumberland in September, falling to 9°C at night.

Q: How sunny is it in Northumberland in September?

There are normally 4 hours of bright sunshine each day in Berwick-on-Tweed, Northumberland in September - that's 32% of daylight hours.

Q: How warm is the sea around Northumberland in September?

The average sea temperature around Berwick-on-Tweed, Northumberland in September is 13°C.

Q: Does it rain in Northumberland in September?

There are usually 16 days with some rain in Berwick-on-Tweed, Northumberland in September and the average monthly rainfall is 56mm.

Expect daytime maximum temperatures of 16°C in Northumberland in September based on long-term weather averages. There are 4 hours of sunshine per day on average with 16 days with some rainfall and typically 56 mm of rainfall in the month.

16
16°C max day temperature
4
4 hours of sunshine per day
16
16 days with some rainfall
9
9°C min night temperature
13
13 hours of daylight per day
0
No heat & humidity
56
56 mm of monthly rainfall
3
3 (Moderate) UV index
13
13°C sea temperature

More about Northumberland

Northumberland by month

Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec

Recommended for Northumberland

LateRooms.com: UK spa hotel offers & discounts

Sale

Check out top UK spa hotel stays with LateRooms.com
Browse stays across London, the Cotswolds & beyond
Filter deals by dates, destination, guests & more

Go to LateRooms.com deal >>

View all LateRooms.com offers

The September weather guide for Northumberland (Berwick-on-Tweed) shows long term weather averages processed from data supplied by CRU (University of East Anglia), the Met Office & the Netherlands Meteorological Institute. Find out more about our data sources.

Top Northumberland destinations

Below are average maximum temperatures at popular countries, regions and places in Northumberland in September. Select a holiday destination to see more weather parameters.

Metric (°C / mm) | Imperial (°F / inches)

More about the UK

How warm is it in Northumberland in September?

Daytime temperatures usually reach 16°C in Berwick-on-Tweed, Northumberland in September, falling to 9°C at night.

How sunny is it in Northumberland in September?

There are normally 4 hours of bright sunshine each day in Berwick-on-Tweed, Northumberland in September - that's 32% of daylight hours.

How warm is the sea around Northumberland in September?

The average sea temperature around Berwick-on-Tweed, Northumberland in September is 13°C.

Does it rain in Northumberland in September?

There are usually 16 days with some rain in Berwick-on-Tweed, Northumberland in September and the average monthly rainfall is 56mm.

Northumberland September sunrise & sunset times

Browse the sunrise and sunset times for Northumberland in September 2025. Select a month to view Northumberland sunrise and sunset times for the next 12 months. The Northumberland sunrise and sunset times shown below are for Berwick-on-Tweed.

Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec