Derry, United Kingdom experiences average highs of 12°C (54°F) and lows of 7°C (45°F) throughout the year. Rainfall is frequent, averaging about 16 rainy days per month. Average highs have warmed by 1.0°C (1.8°F) across the available records.
Derry, United Kingdom Weather & Climate 2026
Monthly climate averages for Derry, United Kingdom. Based on 10-year ERA5 reanalysis data.
Climate Overview
Drier season: Jan–Dec 
Wetter season: Jun–Oct At-a-Glance Climate Summary
Live Weather & Air Quality
Key figures
Climate Score
4.3/10
Best: May, June, July, August, September
UV Index
3
Low
Temperature 12°C / 7°C
Feels Like 10°C / 4°C
Rainy Days 16
Rainfall 86 mm
Sunshine 7 h
Humidity 83%
Wind Speed 22 km/h
Dew Point 7°C
Snow Days 3 days
Frost Days 2 days
Hottest Month
18°C
July
Avg Low12°C
Rain15days
Coldest Month
3°C
January
Avg High7°C
Rain15days
Driest Month
14days
May
Avg High15°C
Avg Low8°C
Windiest Month
27 km/h
February (Gusts 59)
Worst Time to Visit
Consider avoiding January, February, March, December due to very cold temperatures, heavy rainfall.
Sun Position
Sunrise 04:51
Daylight 17.3h
Sunset 22:11
Live conditions—
Derry on the map · live conditions
Derry, United Kingdom
- Continent
- Europe
- Country
- United Kingdom
- City
- Derry
- Population
- 83.7K
- Coordinates
- 55.00°, -7.31°
Seasonal Breakdown
Spring
Mar–May
Avg High 12°C
Avg Low 6°C
Rain 15 days/mo
1/3 best months
Summer
Jun–Aug
Avg High 17°C
Avg Low 12°C
Rain 17 days/mo
3/3 best months
Autumn
Sep–Nov
Avg High 13°C
Avg Low 8°C
Rain 16 days/mo
1/3 best months
Winter
Dec–Feb
Avg High 8°C
Avg Low 4°C
Rain 16 days/mo
Climate Charts
Based on historical averages (2016–2025)
Monthly Temperatures
HighLowShaded bands show the typical range across the available yearly records.
Line chart showing monthly temperatures. Jan: 7°C / 3°C . Feb: 8°C / 4°C . Mar: 9°C / 4°C . Apr: 12°C / 5°C . May: 15°C / 8°C . Jun: 17°C / 11°C . Jul: 18°C / 12°C . Aug: 18°C / 12°C . Sep: 16°C / 11°C . Oct: 13°C / 9°C . Nov: 10°C / 6°C . Dec: 8°C / 4°C .
Monthly Rainfall
Rainfall
Bar chart showing monthly rainfall. Jan: 77 mm. Feb: 91 mm. Mar: 79 mm. Apr: 72 mm. May: 75 mm. Jun: 86 mm. Jul: 93 mm. Aug: 108 mm. Sep: 84 mm. Oct: 100 mm. Nov: 83 mm. Dec: 89 mm.
Monthly Humidity
Humidity
Line chart showing monthly humidity. Jan: 86%. Feb: 83%. Mar: 82%. Apr: 79%. May: 78%. Jun: 80%. Jul: 82%. Aug: 83%. Sep: 83%. Oct: 85%. Nov: 86%. Dec: 89%.
Monthly Wind Speed
Wind SpeedGusts
Bar chart showing monthly wind speed. Jan: 24 km/h . Feb: 27 km/h . Mar: 23 km/h . Apr: 21 km/h . May: 19 km/h . Jun: 19 km/h . Jul: 18 km/h . Aug: 20 km/h . Sep: 21 km/h . Oct: 23 km/h . Nov: 22 km/h . Dec: 24 km/h .
Sunshine
Sunshine
Sunshine: Jan: 3h. Feb: 5h. Mar: 7h. Apr: 9h. May: 11h. Jun: 10h. Jul: 9h. Aug: 9h. Sep: 7h. Oct: 5h. Nov: 4h. Dec: 3h.
UV Index
UV Index
Bar chart showing monthly UV index. Jan: UV 1. Feb: UV 1. Mar: UV 3. Apr: UV 4. May: UV 5. Jun: UV 5. Jul: UV 5. Aug: UV 5. Sep: UV 3. Oct: UV 2. Nov: UV 1. Dec: UV 1.
Monthly Daylight Hours
Daylight12h reference
Monthly Dew Point & Comfort
Dew Point Dry Comfortable Humid Muggy Oppressive
Snow Days
Snow DaysSnowfall
Snow Days: Jan: 4 days. Feb: 4 days. Mar: 2 days. Apr: 1 days. May: 0 days. Jun: 0 days. Jul: 0 days. Aug: 0 days. Sep: 0 days. Oct: 0 days. Nov: 0 days. Dec: 2 days.
Climate Trends
Average highs have warmed by 1.0°C (1.8°F) across the available records. Average rainfall has remained broadly steady.
2016 to 2025
Avg high Avg rainfall
Climate summary
| Last 12 months | All years | |
|---|---|---|
| Hottest month | Aug 2025 · 19°C | Jul · 18°C |
| Coldest month | Jan 2025 · 3°C | Jan · 3°C |
| Wettest month | Oct 2025 · 133 mm | Aug · 108 mm |
| Windiest month | Feb 2025 · 24 km/h | Feb · 27 km/h |
Month-by-Month Weather Table
January
Poor 
February
Poor March
Poor April
Fair May best
Fair June best
Good July best
Fair August best
Wet September best
Fair October
Poor November
Poor December
Poor | Month | Temp | Feels Like | Rain | Sun | Humidity | UV | Status | Details |
|---|---|---|---|---|---|---|---|---|
| January | 7°C / 3°C | 4°C / -1°C | 15days (77 mm) Wet | 3.4h Poor | 86% Very Muggy | 0.8 Low | Poor | View Details |
| February | 8°C / 4°C | 4°C / -1°C | 16days (91 mm) Wet | 5.1h Fair | 83% Humid | 1.4 Low | Poor | View Details |
| March | 9°C / 4°C | 6°C / 0°C | 16days (79 mm) Wet | 6.8h Fair | 82% Humid | 2.5 Moderate | Poor | View Details |
| April | 12°C / 5°C | 8°C / 2°C | 15days (72 mm) Wet | 9h Good | 79% Humid | 4 Moderate | Fair | View Details |
| May best | 15°C / 8°C | 13°C / 6°C | 14days (75 mm) Wet | 10.6h Excellent | 78% Humid | 5.3 High | Fair | View Details |
| June best | 17°C / 11°C | 15°C / 9°C | 17days (86 mm) Wet | 9.7h Good | 80% Humid | 5.2 High | Good | View Details |
| July best | 18°C / 12°C | 17°C / 11°C | 15days (93 mm) Wet | 8.8h Good | 82% Humid | 4.8 Moderate | Fair | View Details |
| August best | 18°C / 12°C | 16°C / 11°C | 18days (108 mm) Wet | 8.9h Good | 83% Humid | 4.5 Moderate | Wet | View Details |
| September best | 16°C / 11°C | 14°C / 9°C | 16days (84 mm) Wet | 6.9h Fair | 83% Humid | 3.4 Moderate | Fair | View Details |
| October | 13°C / 9°C | 10°C / 6°C | 17days (100 mm) Wet | 5h Fair | 85% Humid | 1.8 Low | Poor | View Details |
| November | 10°C / 6°C | 7°C / 2°C | 15days (83 mm) Wet | 3.9h Poor | 86% Very Muggy | 1 Low | Poor | View Details |
| December | 8°C / 4°C | 5°C / 0°C | 16days (89 mm) Wet | 2.6h Poor | 89% Very Muggy | 0.5 Low | Poor | View Details |
Compare Nearby City Climates
Frequently Asked Questions
The best months to visit Derry are May, June, July, August, September, when temperatures are comfortable and rainfall is at its lowest. This is based on 10-year climate averages for Derry, scoring temperature, rainfall, humidity, and sunshine hours.
The hottest month in Derry is July, with average daytime highs of 18°C (64°F). Plan outdoor activities for early morning or late afternoon if visiting during this period.
The coldest month in Derry is January, with average overnight lows of 3°C (38°F). Pack warm layers and expect shorter daylight hours during this period.
The wettest month in Derry is August, averaging 108mm of precipitation across 18 rainy days. An umbrella or waterproof jacket is essential.
The rainy season in Derry runs through August, June, October, February, with the heaviest rainfall in August. Based on 10-year averages for Derry.
Derry receives approximately 81 sunshine hours per year. The sunniest month is May with around 11 hours. Based on climate data for Derry.
The least favorable months to visit Derry are January, February, March, December, primarily due to very cold temperatures, heavy rainfall. For the best conditions, consider May, June, July, August, September instead.
The annual average UV index in Derry is 3, classified as moderate. Standard sun protection (sunscreen, hat) is recommended during prolonged outdoor exposure.
Average humidity in Derry is 83%, classified as humid. High humidity makes warm temperatures feel significantly hotter — lightweight, breathable clothing is recommended.
Yes, Derry receives snow. Months with snowfall average 3 snow days and 2 cm (1 in) of accumulation, with about 2 frost days during winter.
Average wind speeds in Derry are 22 km/h (14 mph). The windiest month is February with peak winds reaching 27 km/h (16 mph) (gusts up to 59 km/h / 36 mph).
Derry averages 1 clear-sky days per month with overall cloud cover around 78%. The clearest skies occur in April.
The annual average dew point in Derry is 7°C (45°F), which feels dry and comfortable. Outdoor activities are comfortable year-round from a humidity standpoint.
Derry has a Oceanic climate, classified as Cfb under the Köppen system. Temperate climates have mild winters and warm summers, with rainfall spread across the year and four distinct seasons.
The 'feels like' temperature in Derry ranges from 4°C (39°F) to 10°C (50°F) on average. Wind chill makes winters feel noticeably colder than the actual temperature — layered clothing is recommended.
Yes, June is a great time to visit Derry. It earns a climate score of 6.6/10 with Good.
For June in Derry, pack Layered clothing, Light jacket, Umbrella, Waterproof jacket, Waterproof shoes. With average highs of 17°C (62°F) and 17 rainy days, these essentials will keep you comfortable.
Data Source
Climate data derived from ERA5 reanalysis (ECMWF), averaged over 2016–2025. Sea surface temperature from marine reanalysis data. Climate scores and seasonal estimates are computed by WorldStats.
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