Weather in Belfast in July 2025
Average weather
Average temperature in Belfast in July
The expected average maximum temperature in July is +18°C with a maximum of +21°C and a minimum of +10°C.
The average maximum temperature goes up 9% by the end of the month, compared with the beginning of the month, from +17°C to +18°C.
Is Belfast warm or cold in July?
Belfast is typically mild in July.
Maximum temperatures go up compared to the previous month from +17°C to +18°C. The minimum temperature also goes up from +10°C to +12°C.
Pack a light jacket as it will be warm in the day and cool in the evenings.
July is one of the warmest months in Belfast, here is the comparison with other months:
Water temperature in Belfast in July
Water in Belfast in July is Cold. It varies from +12°C to +15°C, with an average of +14°C. This is almost similar to the air temperature, which averages +18°C.
The water temperature in July is one of the warmest of the entire year:
Can you swim in Belfast in July?
Climate in Belfast in July
| June | July | August | ||||
|---|---|---|---|---|---|---|
| Avg. temperature | ||||||
| +17°C | +18°C | +18°C | ||||
| Min. temperature | ||||||
| +2°C | +4°C | +3°C | ||||
| Max. temperature | ||||||
| +30°C | +29°C | +29°C | ||||
| Rainfall | ||||||
| 73 mm | 74 mm | 82 mm | ||||
| Wind | ||||||
| 4 m/s | 3 m/s | 3 m/s | ||||
| Avg. water temperature | ||||||
| +12°C | +14°C | +14°C | ||||
| Humidity | ||||||
| 77% | 78% | 81% | ||||
| Air pressure | ||||||
| 1014 HPa | 1013 HPa | 1012 HPa | ||||
| Sunny days | ||||||
| 2 | 2 | 1 | ||||
| Cloudy days | ||||||
| 8 | 8 | 9 | ||||
| Rainy days | ||||||
| 19 | 20 | 21 | ||||
| Snowy days | ||||||
| 0 | 0 | 0 | ||||
July weather is still as ok as in June. It’s getting warmer as July arrives. The average maximum temperature goes up from +17°C to +18°C during the day. Prepare for more rain. Average rainfall goes from 73 mm to 74 mm. Humidity rises from 77% to 78%. Winds are calmer in comparison to June, going down from 4 m/s to 3 m/s on average. The amount of sunny days stay about the same, averaging 2 sunny days during the month.
August brings much the same weather, it remains ok.
Wind
The average wind speed is 5 m/s getting up to 8 m/s which is a medium breeze. You can feel it, especially getting out of the water.
The average wind speed in Belfast is gradually decreasing during July, going from 8 m/s to 6 m/s over the course of the month.
Rain
How was the weather last July in Belfast?
Climate Change over Years
The climate in Belfast in July has not changed much over the last 43 years.
The average temperature was the lowest in 1979 (+11°C) and the highest in 1995 (+14°C). The driest year was 2003 with only 711 mm of rainfall, and the wettest year was 2019 with 1255 mm.
FAQ
Is July a good time to visit Belfast?
Can you sunbathe in Belfast in July?
Can you swim in Belfast in July?
Is Belfast rainy in July?
Is it sunny in Belfast in July?
Other cities in United Kingdom
Monthly weather in Belfast
Source of the data
For this page, we’ve looked at the typical weather in Belfast, 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.