Weather in Newcastle in September 2025
Average weather
Average temperature in Newcastle in September
Going from a maximum of +79°F during the day to a minimum of +46°F during the night, the temperature in September averages around +66°F.
The average maximum temperature goes down 11% by the end of the month, compared with the beginning of the month, from +63°F to +59°F.
Is Newcastle warm or cold in September?
Newcastle is typically mild in September.
Maximum temperatures go down compared to the previous month from +66°F to +63°F. The minimum temperature also goes down from +54°F to +50°F.
Pack a light jacket as it will be warm in the day and cool in the evenings.
September is one of the warmest months in Newcastle, here is the comparison with other months:
Water temperature in Newcastle in September
Water in Newcastle in September is Fresh. It varies from +64°F to +69°F, with an average of +66°F. Note that the air temperature is lower than the water temperature, averaging around +63°F.
The water temperature in September is one of the coldest of the entire year:
Can you swim in Newcastle in September?
Climate in Newcastle in September
| August | September | October | ||||
|---|---|---|---|---|---|---|
| Avg. temperature | ||||||
| +66°F | +63°F | +55°F | ||||
| Min. temperature | ||||||
| +39°F | +36°F | +27°F | ||||
| Max. temperature | ||||||
| +90°F | +81°F | +77°F | ||||
| Rainfall | ||||||
| 72 mm | 57 mm | 67 mm | ||||
| Wind | ||||||
| 3 m/s | 3 m/s | 4 m/s | ||||
| Avg. water temperature | ||||||
| +66°F | +66°F | +67°F | ||||
| Humidity | ||||||
| 77% | 79% | 82% | ||||
| Air pressure | ||||||
| 1012 HPa | 1013 HPa | 1010 HPa | ||||
| Sunny days | ||||||
| 3 | 3 | 3 | ||||
| Cloudy days | ||||||
| 8 | 10 | 9 | ||||
| Rainy days | ||||||
| 19 | 16 | 18 | ||||
| Snowy days | ||||||
| 0 | 0 | 0 | ||||
September weather is still as ok as in August. It’s getting colder in September. From +66°F in the day, the average maximum temperature lowers to +63°F. As September arrives, the amount of rainfall goes down. On average, the rainfall volume decreases from 72 mm to 57 mm. Humidity rises from 77% to 79%. The average wind speed doesn’t change much during September, staying around 3 m/s. The amount of sunny days stay about the same, averaging 3 sunny days during the month.
October brings much the same weather, it remains ok.
Wind
The average wind speed is 3 m/s getting up to 7 m/s which is a medium breeze. You can feel it, especially getting out of the water.
The average wind speed in Newcastle is gradually increasing during September, going from 2 m/s to 2 m/s over the course of the month.
Rain
How was the weather last September in Newcastle?
Climate Change Over the Years
The climate in Newcastle in September has not changed that much over the last 43 years.
The average temperature was the lowest in 1996 (+52°F) and the highest in 2022 (+56°F). The driest year was 2003 with only 518 mm of rainfall, and the wettest year was 2012 with 1037 mm.
FAQ
Is September a good time to visit Newcastle?
Can you sunbathe in Newcastle in September?
Can you swim in Newcastle in September?
Is Newcastle rainy in September?
Is it sunny in Newcastle in September?
Other cities in United Kingdom
Monthly weather in Newcastle
Source of the data
For this page, we’ve looked at the typical weather in Newcastle, based on historical hourly weather data from January 1, 1979, to December 31, 2023.
For past dates, we show actual recorded data at the location at that time. Forecasts are based on recorded weather during that day of the year, averaged over the total years for which we have records (unless stated otherwise). The daily temperature is the highest recorded temperature in the shadow during that day.