Derry weather forecast
UK towns · Northern Ireland · 55.00°N 7.31°W
Derry, in Northern Ireland, has its warmest weather in August, when daytime temperatures average 17.8°C, while January nights are the coldest at around 3.2°C. The town sees roughly 1246mm of rain a year; October is normally the wettest month and April the driest. Figures are averaged from 2020–2024 observations.
Climate averages
| Month | Avg high | Avg low | Rain | Rain days |
|---|---|---|---|---|
| Jan | 7.4° | 3.2° | 95mm | 15 |
| Feb | 8.3° | 3.8° | 124mm | 20 |
| Mar | 9.5° | 3.7° | 89mm | 17 |
| Apr | 11.7° | 4.8° | 76mm | 15 |
| May | 14.6° | 8° | 84mm | 17 |
| Jun | 16.8° | 10.5° | 93mm | 17 |
| Jul | 17.5° | 11.7° | 115mm | 20 |
| Aug | 17.8° | 12° | 118mm | 20 |
| Sep | 16.4° | 10.7° | 101mm | 17 |
| Oct | 13.2° | 8.7° | 131mm | 20 |
| Nov | 10.3° | 6° | 93mm | 17 |
| Dec | 7.8° | 4° | 127mm | 18 |
Seasons in Derry
Spring (March–May). Daytime highs in Derry climb from 9.5°C in March to 14.6°C by May, while nights ease from 3.7°C to 8°C. The season brings around 249mm of rain in total.
Summer (June–August). The warmest stretch of the year: afternoons average 17.4°C, peaking in August at 17.8°C. June is usually the driest of the summer months (93mm over ~17 rainy days). Around the June solstice, Derry gets roughly 17.1 hours of daylight.
Autumn (September–November). Daytime temperatures fall from 16.4°C in September to 10.3°C by November, and rainfall builds to its annual peak — October is the wettest month of the year (131mm).
Winter (December–February). Nights average 3.7°C, with January the coldest month (average low 3.2°C, daytime high 7.4°C). Expect about 53 days with measurable rain over the three months, and only around 6.9 hours of daylight in mid-December.
How Derry compares
| Derry | UK town average | |
|---|---|---|
| Annual rainfall | 1246mm | 1054mm |
| Rainy days per year | 213 | 167 |
| Summer daytime high | 17.4°C | 19.7°C |
| Winter night low | 3.7°C | 3.4°C |
Derry is about 18% wetter than the average for the 121 UK towns tracked on this site (1054mm), based on 2020–2024 monthly normals.
Derry weather FAQs
What is the warmest month in Derry?
August is typically the warmest month in Derry, with average daytime highs of 17.8°C. Summer afternoons (June–August) average around 17.4°C.
What is the wettest month in Derry?
October is usually the wettest month, with around 131mm of rain over roughly 20 rainy days. April is typically the driest (76mm).
How much does it rain in Derry per year?
Derry receives roughly 1246mm of precipitation per year, spread over about 213 days with at least 1mm of rain (based on 2020–2024 observations).
How cold are winters in Derry?
Winter nights (December–February) in Derry average around 3.7°C, with January typically the coldest month (average low 3.2°C).
When is the best time to visit Derry for good weather?
Late spring and summer offer the most reliable weather in Derry. June is typically the driest of the warm months (93mm of rain), while August is the warmest, averaging 17.8°C by day — and near the June solstice there are around 17 hours of daylight to enjoy.
How does Derry's weather compare with the rest of the UK?
Derry receives 1246mm of rain a year, about 18% wetter than the average for the 121 UK towns tracked on this site (1054mm). Summer daytime highs average 17.4°C against a UK-town average of 19.7°C, and winter nights average 3.7°C versus 3.4°C.
Is it going to rain in Derry?
For up-to-the-minute rain tracking, check the live rain radar — as a long-term guide, Derry averages 213 rainy days a year, with October the wettest month (131mm) and April the driest (76mm).
What is the 7-day forecast for Derry?
See the live hourly and 7-day forecast for day-by-day temperatures and rain chance. The figures on this page are long-term climate averages from 2020–2024, not the live forecast.