Average weather, temperature, rainfall, sunshine hours
The climate of Derry is
oceanic, with quite cold, rainy winters and mild, relatively rainy summers.
Derry, or Londonderry, is located in Northern Ireland, a short distance from Lough Foyle, the river estuary that runs through the city and opens up into a bay before flowing into the sea.
The
average temperature of the coldest month (January) is of 5.1 °C (41 °F), that of the warmest month (July) is of 15.3 °C (59 °F). Here are the average temperatures.
Derry - Average temperatures| Month | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec |
|---|
| Min (°C) | 2 | 2 | 4 | 5 | 7 | 10 | 12 | 11 | 10 | 7 | 4 | 2 |
|---|
| Max (°C) | 8 | 8 | 10 | 12 | 15 | 17 | 19 | 18 | 17 | 14 | 10 | 8 |
|---|
| Min (°F) | 36 | 36 | 39 | 41 | 45 | 50 | 54 | 52 | 50 | 45 | 39 | 36 |
|---|
| Max (°F) | 46 | 46 | 50 | 54 | 59 | 63 | 66 | 64 | 63 | 57 | 50 | 46 |
|---|
amounts to 855 millimeters (33.7 inches) per year: so, it is at an intermediate level. It ranges from 50 mm (2 in) in the driest month (May) to 90 mm (3.5 in) in the wettest ones (October, December). Here is the average precipitation.
Derry - Average precipitation| Month | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | Year |
|---|
| Prec.(mm) | 85 | 65 | 70 | 55 | 50 | 55 | 65 | 75 | 70 | 90 | 85 | 90 | 855 |
|---|
| Prec.(in) | 3.3 | 2.6 | 2.8 | 2.2 | 2 | 2.2 | 2.6 | 3 | 2.8 | 3.5 | 3.3 | 3.5 | 33.7 |
|---|
| Days | 17 | 13 | 16 | 12 | 12 | 11 | 13 | 13 | 13 | 16 | 19 | 15 | 170 |
|---|
On average, there are around 1,345
sunshine hours per year. So, the sun doesn't shine often. Here are the average sunshine hours per day.
Derry - Sunshine| Month | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec |
|---|
| Hours | 2 | 3 | 3 | 5 | 7 | 5 | 5 | 5 | 4 | 3 | 2 | 1 |
|---|
The
sea temperature ranges between 9 °C (48 °F) and 15 °C (59 °F). So, it is cold all year round. Here are the average sea temperatures.
Derry - Sea temperature| Month | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec |
|---|
| Temp (°C) | 9 | 9 | 9 | 9 | 10 | 12 | 14 | 15 | 14 | 13 | 12 | 10 |
|---|
| Temp (°F) | 48 | 48 | 48 | 48 | 50 | 54 | 57 | 59 | 57 | 55 | 54 | 50 |
|---|
Best Time
The best time to visit Derry is the summer,
from June to August, since it is the mildest of the year. The temperatures are generally good for outdoors activities, although it's better to bring an umbrella, and a sweatshirt or sweater for the evening or for cool days.