County Antrim Climate and Average Weather
Climate of County Antrim: average temperatures, rainfall and seasons month by month.
Climate in County Antrim month by month
Average high, average low and total rainfall, based on three years of reanalysis data.
| Month | Avg high | Avg low | Rainfall | Rating |
|---|---|---|---|---|
| January | 43° | 37° | 3,7 in | ★★☆☆☆ |
| February | 46° | 39° | 3,4 in | ★★★☆☆ |
| March | 50° | 40° | 3,3 in | ★★★☆☆ |
| April | 54° | 43° | 3,5 in | ★★★☆☆ |
| May | 60° | 49° | 3,7 in | ★★★★☆ |
| June | 62° | 52° | 5,3 in | ★★★★☆ |
| July | 65° | 55° | 3,0 in | ★★★★☆ |
| August | 64° | 55° | 3,4 in | ★★★★☆ |
| September | 60° | 51° | 4,6 in | ★★★★☆ |
| October | 55° | 49° | 3,9 in | ★★★☆☆ |
| November | 49° | 42° | 3,4 in | ★★★☆☆ |
| December | 47° | 41° | 4,8 in | ★★☆☆☆ |
Climate type: Temperate. Source: Open-Meteo archive (ERA5).
Recent extremes in County Antrim
Highest and lowest readings observed in the last 3 years of reanalysis data - not all-time records.
How County Antrim compares with nearby places
Annual averages, and the difference against County Antrim.
| Place | Distance | Avg temp | vs here | Annual rain |
|---|---|---|---|---|
| County Monaghan | 45 mi | 50°F | about the same | 41 in |
| County Louth | 56 mi | 51°F | +33°F warmer | 42 in |
| County Cavan | 68 mi | 50°F | about the same | 43 in |
| County Donegal | 76 mi | 50°F | about the same | 75 in |
| County Meath | 79 mi | 51°F | about the same | 39 in |
Climate by city in County Antrim
1 cities mapped in this atlas
Best time to visit County Antrim
Go in July and August. These months score highest on comfortable temperatures, low rainfall and useful daylight.
Hardest months: January, February and December - expect the least comfortable mix of heat, cold or rain.
What this means for County Antrim
Today is about average for August. The forecast high of 64°F is in line with the 64°F typical for this month.
Rain is very unlikely today - plans do not need a backup.
No weather-related travel disruption is expected today. Roads and airports should run normally.
Northern Hemisphere, so peak summer falls in June to August.
The gap between the warmest and coldest month averages 52°F.
What to pack, what to skip
- Layers - the daily swing is 55°F, so mornings feel nothing like afternoons
- A packable rain shell - 4 of the next 7 days carry a real chance of rain
- If your dates are flexible, avoid January, February and December - historically the least comfortable months here.
Summary
County Antrim is a county in Northern Ireland. County Antrim is a county or metropolitan area in the United Kingdom. It has a population of about 620.000.
Right now it is 55°F (13°C) in County Antrim with overcast. It feels like 54°F. Today runs from 54°F to 64°F. Chance of precipitation is 0%. Sightseeing conditions score 9.4/10 - excellent - go now.
The best time to visit County Antrim is July and August. The climate is temperate. January, February and December tend to be the least comfortable months. July is the warmest month with average highs near 65°F, while January is the coldest with lows near 37°F.
The closest major airport is Dublin Airport (DUB), about 90 mi away. Nearby highlights include Lake District National Park, Edinburgh Castle, Old and New Towns of Edinburgh and Snowdonia National Park.
In plain terms. Today is about average for August. The forecast high of 64°F is in line with the 64°F typical for this month. The best window to be outside is roughly 4 PM to 7 PM, when temperature, rain chance and wind line up best. hiking is the strongest bet in County Antrim today at 9.8/10. No weather-related travel disruption is expected today. Roads and airports should run normally.
Compiled from this page's own data: atlas facts plus live Open-Meteo readings.
Quick facts about County Antrim
| Type | County |
|---|---|
| Region | Northern Ireland |
| Country | United Kingdom |
| Continent | Europe |
| Coordinates | 54°43′10.2″N 6°12′25.9″W (54.7195, -6.2072) |
| Population | 620.000 |
| Local time | 10:24 AM (UTC+01:00) |
| Best months | July and August |
| Climate | Temperate |
Weather map for County Antrim
Animated model layers. Pick a layer to load it.
Animated layers by Windy. For pin-level detail and nearby places, see the interactive map below.
Explore County Antrim
Every topic we hold for this place, and the same topic for the places around it.
Climate for related places
Frequently asked questions
Where is County Antrim?
County Antrim is a county in Northern Ireland. Its coordinates are 54.7195, -6.2072. It lies in Europe.
What is the weather like in County Antrim right now?
It is currently 55°F (13°C) with overcast. Humidity is 86% and wind is 4 mph.
When is the best time to visit County Antrim?
July and August offer the most comfortable conditions in County Antrim, which has a temperate climate. January, February and December are usually the hardest months for outdoor plans.
What time zone is County Antrim in?
County Antrim observes Europe/London (UTC+01:00). The local time is 10:24 AM.
How many people live in County Antrim?
County Antrim has a population of approximately 620.000.
What is the nearest airport to County Antrim?
The closest airports are Dublin Airport (DUB), 90 mi away.
What are the top things to do in County Antrim?
Popular options include Lake District National Park, Edinburgh Castle, Old and New Towns of Edinburgh, Snowdonia National Park, Isle of Skye and Loch Ness.
What places are in County Antrim?
County Antrim covers 1 places in this atlas, including Belfast.
Related articles
Data sources and methodology
| Place data | USPOTUS Atlas dataset (uk-regions) - coordinates, hierarchy and facts. |
|---|---|
| Forecast and observations | Open-Meteo (ECMWF and national models). |
| Air quality and pollen | Copernicus CAMS via Open-Meteo. US AQI scale. |
| Climate averages | ERA5 reanalysis via the Open-Meteo archive, aggregated over 3 years. |
| Method | Scores, comparisons and advice on this page are computed from the inputs above. Distances are straight-line. Nothing is estimated where data is missing - the block is simply not shown. |
Last updated August 23, 2026 at 10:24 AM local time. Live blocks refresh every 15 minutes; climate averages monthly.
