County Antrim Weather Forecast
County Antrim weather: 65°F, overcast. Hourly forecast, 14-day outlook, UV, air quality and the best time to visit.
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).
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.
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 |
What to pack, what to skip
- Layers - the daily swing is 52°F, so mornings feel nothing like afternoons
- A packable rain shell - 7 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.
See the County Antrim forecast by time range
County Antrim weather - more answers
Explore County Antrim
Every topic we hold for this place, and the same topic for the places around it.
Weather 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 65°F (18°C) with overcast. Humidity is 64% and wind is 11 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 11:18 PM.
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 25, 2026 at 11:18 PM local time. Live blocks refresh every 15 minutes; climate averages monthly.
