Sion Mills, Northern Ireland Climate
United Kingdom
Pop. 2,212 Elev. 30 m / 98 ft
TZ: Europe/London (UTC+1) ·
Sion Mills has cool summers with average highs of 66°F (19°C) in August, and cool winters averaging 36°F (2°C) in January. Rain falls on about 75 days per year (40.6 in / 1032 mm total), with 4 in (95 mm) of annual snowfall. The city averages 38 sunny days per year and around 21 thunderstorm days. Ocean water temperatures reach 62°F (16°C) in summer.
| Temperature | 19°C (66°F) high | 2°C (36°F) low |
| Feels like | 0°C (33°F) low | |
| Rain | 75 days | 1032 mm (40.6 in) /yr |
| Snow | 0 days | 95 mm (3.7 in) /yr |
| Sky | 38 sunny | 21 stormy |
| Wind | 1.9 m/s (4.3 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 (%)
75
Jan 74
Feb 78
Mar 60
Apr 57
May 81
Jun 80
Jul 77
Aug 81
Sep 87
Oct 78
Nov 75
Dec Humidity (%)
90
Jan 85
Feb 80
Mar 74
Apr 73
May 80
Jun 81
Jul 82
Aug 84
Sep 87
Oct 88
Nov 90
Dec Weather Days by Month
Water Temperatures
Cities with Similar Climate
Find similar cities on the map →Nearby Cities
Nearby
Commercial airport 35 km City of Derry Airport (LDY)
Ski resort 193 km Ski Club Of Ireland
National park 3 km
Hospital 5 km Lifford Community Hospital
Hiking trail 14 km Eskeradooey Public Right of Way
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Monthly Weather Data
↑ See chart| Month | Avg High | Avg Low | Rainfall | Snowfall | Sunny Days |
|---|---|---|---|---|---|
| January | 7°C 44°F | 2°C 36°F | 46 mm 1.8 in | 68 mm2.7 in | 1 |
| February | 8°C 46°F | 4°C 39°F | 84 mm 3.3 in | 24 mm0.9 in | 3 |
| March | 11°C 52°F | 4°C 40°F | 29 mm 1.1 in | — | 2 |
| April | 14°C 58°F | 6°C 43°F | 91 mm 3.6 in | — | 8 |
| May | 17°C 62°F | 7°C 45°F | 68 mm 2.7 in | — | 12 |
| June | 17°C 62°F | 11°C 51°F | 115 mm 4.5 in | — | 0 |
| July | 19°C 65°F | 13°C 55°F | 78 mm 3.1 in | — | 3 |
| August | 19°C 66°F | 13°C 55°F | 69 mm 2.7 in | — | 3 |
| September | 15°C 59°F | 9°C 48°F | 109 mm 4.3 in | — | 0 |
| October | 12°C 54°F | 9°C 48°F | 140 mm 5.5 in | — | 0 |
| November | 10°C 49°F | 5°C 41°F | 115 mm 4.5 in | 4 mm0.1 in | 1 |
| December | 8°C 46°F | 4°C 39°F | 88 mm 3.5 in | — | 5 |
Weather Days by Month
↑ See chart| Month | Sunny Days | Storm Days |
|---|---|---|
| January | 1 | 0 |
| February | 3 | 0 |
| March | 2 | 0 |
| April | 8 | 1 |
| May | 12 | 2 |
| June | 0 | 3 |
| July | 3 | 4 |
| August | 3 | 1 |
| September | 0 | 5 |
| October | 0 | 3 |
| November | 1 | 1 |
| December | 5 | 1 |
Water Temperatures Data
↑ See chart| Month | Ocean Avg High | Lake Avg High |
|---|---|---|
| January | 9°C 48°F | 4°C 40°F |
| February | 8°C 46°F | 5°C 40°F |
| March | 9°C 48°F | 7°C 44°F |
| April | 10°C 50°F | 10°C 49°F |
| May | 13°C 55°F | 13°C 56°F |
| June | 15°C 59°F | 14°C 58°F |
| July | 16°C 61°F | 16°C 61°F |
| August | 16°C 62°F | 16°C 61°F |
| September | 16°C 60°F | 12°C 54°F |
| October | 14°C 58°F | 10°C 51°F |
| November | 12°C 54°F | 7°C 45°F |
| December | 10°C 51°F | 5°C 42°F |