Castlereagh, Northern Ireland Climate
United Kingdom
Pop. 56,679 Elev. 29 m / 95 ft
TZ: Europe/London (UTC+1) ·
Temperatures in Castlereagh stay moderate year-round, from 38°F (3°C) in January to 66°F (19°C) in August. Expect around 64 rainy days annually (38.0 in / 966 mm total). Overcast skies are common, with only 53 sunny days per year. Ocean water temperatures reach 60°F (16°C) in summer.
| Temperature | 19°C (66°F) high | 3°C (38°F) low |
| Feels like | 1°C (34°F) low | |
| Rain | 64 days | 966 mm (38.0 in) /yr |
| Sky | 53 sunny | 11 stormy |
| Wind | 2.0 m/s (4.4 mph) avg |
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Explore on the MapMonthly Climate Chart
Best months to visit: May, Jul, Aug
Sky & Air by Month
Cloud cover (%)
65
Jan 71
Feb 69
Mar 58
Apr 49
May 75
Jun 75
Jul 67
Aug 73
Sep 79
Oct 73
Nov 70
Dec Humidity (%)
86
Jan 82
Feb 79
Mar 76
Apr 72
May 78
Jun 81
Jul 79
Aug 82
Sep 84
Oct 85
Nov 86
Dec Weather Days by Month
Water Temperatures
Cities with Similar Climate
Find similar cities on the map →Nearby Cities
Nearby
Commercial airport 5 km George Best Belfast City Airport (BHD)
Ski resort 151 km Ski Club Of Ireland
National park 8 km Strangford AONB
Hospital 2 km Forster Green Hospital
Hiking trail 2 km Connswater Community Greenway
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Monthly Weather Data
↑ See chart| Month | Avg High | Avg Low | Rainfall | Snowfall | Sunny Days |
|---|---|---|---|---|---|
| January | 7°C 45°F | 3°C 38°F | 49 mm 1.9 in | 15 mm0.6 in | 6 |
| February | 8°C 47°F | 5°C 40°F | 57 mm 2.2 in | — | 4 |
| March | 11°C 51°F | 6°C 42°F | 24 mm 0.9 in | — | 4 |
| April | 13°C 56°F | 7°C 44°F | 80 mm 3.1 in | — | 10 |
| May | 16°C 61°F | 9°C 47°F | 52 mm 2.1 in | — | 12 |
| June | 17°C 63°F | 12°C 53°F | 113 mm 4.5 in | — | 1 |
| July | 19°C 66°F | 13°C 56°F | 92 mm 3.6 in | — | 4 |
| August | 19°C 66°F | 13°C 56°F | 49 mm 1.9 in | — | 2 |
| September | 16°C 60°F | 10°C 51°F | 122 mm 4.8 in | — | 3 |
| October | 13°C 55°F | 9°C 49°F | 110 mm 4.3 in | — | 1 |
| November | 10°C 50°F | 6°C 43°F | 118 mm 4.7 in | 0 mm0.0 in | 2 |
| December | 9°C 48°F | 5°C 42°F | 100 mm 3.9 in | — | 4 |
Weather Days by Month
↑ See chart| Month | Sunny Days | Storm Days |
|---|---|---|
| January | 6 | 0 |
| February | 4 | 0 |
| March | 4 | 0 |
| April | 10 | 1 |
| May | 12 | 2 |
| June | 1 | 1 |
| July | 4 | 4 |
| August | 2 | 0 |
| September | 3 | 1 |
| October | 1 | 1 |
| November | 2 | 0 |
| December | 4 | 1 |
Water Temperatures Data
↑ See chart| Month | Ocean Avg High | Lake Avg High |
|---|---|---|
| January | 10°C 50°F | 5°C 42°F |
| February | 8°C 47°F | 6°C 42°F |
| March | 8°C 47°F | 7°C 44°F |
| April | 10°C 49°F | 9°C 48°F |
| May | 12°C 54°F | 12°C 54°F |
| June | 13°C 56°F | 14°C 57°F |
| July | 15°C 59°F | 16°C 61°F |
| August | 16°C 60°F | 16°C 61°F |
| September | 15°C 59°F | 13°C 56°F |
| October | 14°C 58°F | 11°C 53°F |
| November | 13°C 55°F | 9°C 47°F |
| December | 11°C 52°F | 7°C 44°F |