6 to 17°C
temperature
1728 hours
sunshine per day
110 mm
rain
243 days
dry
113 days
rain
9 days
snow

Climate of Derry

Derry has a oceanic climate. There is rainfall during all months of the year. The average annual temperature for Derry is 11° degrees and there is about 111 mm of rain in a year. It is dry for 188 days a year with an average humidity of 87% and an UV-index of 3.

Climate averages for the whole year

  • Day: the average daily temperature during the day is between 6°C and 17°C
  • Night:the average nighttime temperature is between 2°C and 10°C
  • Sea temperature: the sea temperature is between 10°C and 16°C
  • Rain: it rains 113 days and there is a total of approximately 110 mm rainfall
  • Snow: it snows an average of 9 days per year
  • Sun hours: throughout the year there are 1728 sun hours
Maximum temperature: between 6°C and 17°C
Warmest month: 17°C in July
Coldest month: 6°C in January
Night temperature: between 2°C and 10°C
Sea temperature: between 10°C and 16°C
Dry days: 243 days
Days with rain: 113 days
Days with snow: 9 days
Total rain sum: 110 mm
Hours of sunshine: 1728 hours

Temperature graph

This graph shows the average maximum temperature (red) and minimum temperature (blue) for Derry.

Precipitation graph

This graph shows the average amount of rainfall per month for Derry.

Climate table of Derry

In this climate table you can see at a glance what the average weather per month is for Derry. The data has been collected over a 30-year period, from which an average per month has been derived. From year to year the differences may be larger or smaller, but with this climate table you have a good idea of what the weather for Derry might be like in a given month.

Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
Day temp. (°C) 6 7 9 11 13 16 17 16 15 12 9 7
Night temp. (°C) 2 2 3 4 6 9 10 10 9 7 5 3
Water temp. (°C) 11 10 10 10 12 14 16 16 15 14 13 12
Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
Precipitation (mm) 10 9 15 5 6 9 10 8 5 10 12 11
Days with rain 10 7 10 9 9 11 12 10 7 8 9 11
Days with snow 3 2 2 - - - - - - - 1 1
Dry days 18 19 19 21 22 19 19 21 23 23 20 19
Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
Sun hours per day 3 4 4 6 6 7 6 5 5 3 4 4
Wind force (Bft) 4 3 3 3 3 3 3 3 3 3 3 3
UV-index 2 2 2 3 3 4 3 3 3 3 2 2

Best time to visit Derry

The best time to visit Derry in Northern Ireland is July. In this period you have a pleasant temperature and almost no precipitation. The highest average temperature in Derry is 17°C in July and the lowest is 6°C in January. The highest water temperature is 16°C and at its coldest the water is 10°C.

Climate of Derry by month

What is the average climate in a given month for Derry? Click on a month to see all monthly averages for sunshine, maximum and minimum temperatures, percent chance of rain per day, snowfall and number of rainy days.

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