Weather archive in Belfast / Aldergrove (airport)
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| Date / Local time | T | Po | P | Pa | U | DD | Ff | ff10 | ff3 | N | WW | W1 | W2 | Tn | Tx | Cl | Nh | H | Cm | Ch | VV | Td | RRR | tR | E | Tg | E' | sss | |
| 2025 September 18, Thursday | 01 | 12.3 54 | 751.3 29.58 1001.65 1001.65 | 757.0 29.8 1009.25 1009.25 | 0.8 0.03 1.07 1.07 | 83 | Wind blowing from the south-southwest | Moderate breeze (6 m/s) (22 km/h) (13 miles/hour) (12 knots) (4 Bft) | 70 – 80%. 7/10 – 8/10. 6 oktas | 70 – 80%. 7/10 – 8/10. 6 oktas | 600-1000 1968-3281 | 15.0 9.3 | 9.4 49 | No precipitation No precipitation | 6 | ||||||||||||||
00 | 12.6 55 | 751.2 29.57 1001.52 1001.52 | 756.8 29.8 1008.98 1008.98 | 1.1 0.04 1.47 1.47 | 80 | Wind blowing from the south-west | Moderate breeze (7 m/s) (25 km/h) (16 miles/hour) (14 knots) (4 Bft) | 50%. 5/10. 4 oktas | 50%. 5/10. 4 oktas | 1000-1500 3281-4921 | 16.0 9.9 | 9.2 49 | |||||||||||||||||
| September 17, Wednesday | 23 | 12.9 55 | 750.7 29.56 1000.85 1000.85 | 756.4 29.78 1008.45 1008.45 | 1.1 0.04 1.47 1.47 | 79 | Wind blowing from the south-southwest | Moderate breeze (7 m/s) (25 km/h) (16 miles/hour) (14 knots) (4 Bft) | 40%. 4/10. 3 oktas | 40%. 4/10. 3 oktas | 1000-1500 3281-4921 | 17.0 10.6 | 9.3 49 | ||||||||||||||||
22 | 13.5 56 | 750.5 29.55 1000.58 1000.58 | 756.1 29.77 1008.05 1008.05 | 1.3 0.05 1.73 1.73 | 77 | Wind blowing from the south-west | Fresh breeze (8 m/s) (29 km/h) (18 miles/hour) (16 knots) (5 Bft) | 100%. 10/10. 8 oktas | 13.4 56 | 18.2 65 | 100%. 10/10. 8 oktas | 600-1000 1968-3281 | 16.0 9.9 | 9.5 49 | No precipitation No precipitation | 12 | |||||||||||||
21 | 14.1 57 | 750.1 29.53 1000.05 1000.05 | 755.8 29.76 1007.65 1007.65 | 1.1 0.04 1.47 1.47 | 71 | Wind blowing from the south-west | Fresh breeze (9 m/s) (32 km/h) (20 miles/hour) (17 knots) (5 Bft) | 100%. 10/10. 8 oktas | 100%. 10/10. 8 oktas | 600-1000 1968-3281 | 19.0 11.8 | 8.9 48 | |||||||||||||||||
20 | 14.6 58 | 749.6 29.51 999.38 999.38 | 755.2 29.73 1006.85 1006.85 | 0.7 0.03 0.93 0.93 | 70 | Wind blowing from the south-west | Fresh breeze (8 m/s) (29 km/h) (18 miles/hour) (16 knots) (5 Bft) | 90 or more, but not 100% 9/10 or more, but not 10/10 7 oktas or more, but not 8 oktas | 90 or more, but not 100% 9/10 or more, but not 10/10 7 oktas or more, but not 8 oktas | 600-1000 1968-3281 | 19.0 11.8 | 9.2 49 | |||||||||||||||||
19 | 15.2 59 | 749.2 29.5 998.85 998.85 | 754.8 29.72 1006.32 1006.32 | 0.6 0.02 0.8 0.8 | 69 | Wind blowing from the south-west | Fresh breeze (8 m/s) (29 km/h) (18 miles/hour) (16 knots) (5 Bft) | 20–30%. 2/10–3/10. 2 oktas | 14.0 57 | 18.2 65 | 20–30%. 2/10–3/10. 2 oktas | 600-1000 1968-3281 | 21.0 13.1 | 9.5 49 | No precipitation No precipitation | 12 | |||||||||||||
18 | 16.0 61 | 749.0 29.49 998.58 998.58 | 754.6 29.71 1006.05 1006.05 | 0.5 0.02 0.67 0.67 | 67 | Wind blowing from the south-west | Fresh breeze (8 m/s) (29 km/h) (18 miles/hour) (16 knots) (5 Bft) | 100%. 10/10. 8 oktas | 100%. 10/10. 8 oktas | 1000-1500 3281-4921 | 22.0 13.7 | 9.8 50 | |||||||||||||||||
17 | 16.5 62 | 748.9 29.48 998.45 998.45 | 754.4 29.7 1005.78 1005.78 | 0.3 0.01 0.4 0.4 | 67 | Wind blowing from the south-west | Moderate breeze (7 m/s) (25 km/h) (16 miles/hour) (14 knots) (4 Bft) | 100%. 10/10. 8 oktas | 100%. 10/10. 8 oktas | 1000-1500 3281-4921 | 21.0 13.1 | 10.3 51 | |||||||||||||||||
16 | 17.6 64 | 748.6 29.47 998.05 998.05 | 754.1 29.69 1005.38 1005.38 | 67 | Wind blowing from the south-west | Fresh breeze (9 m/s) (32 km/h) (20 miles/hour) (17 knots) (5 Bft) | 60%. 6/10. 5 oktas | 60%. 6/10. 5 oktas | 1000-1500 3281-4921 | 21.0 13.1 | 11.3 52 | ||||||||||||||||||
15 | 17.6 64 | 748.5 29.47 997.92 997.92 | 754.0 29.69 1005.25 1005.25 | 0.8 0.03 1.07 1.07 | 66 | Wind blowing from the south-west | Fresh breeze (9 m/s) (32 km/h) (20 miles/hour) (17 knots) (5 Bft) | 70 – 80%. 7/10 – 8/10. 6 oktas | 70 – 80%. 7/10 – 8/10. 6 oktas | 600-1000 1968-3281 | 17.0 10.6 | 11.2 52 | |||||||||||||||||
14 | 16.8 62 | 748.6 29.47 998.05 998.05 | 754.2 29.69 1005.52 1005.52 | 1.4 0.06 1.87 1.87 | 69 | Wind blowing from the south-west | Fresh breeze (9 m/s) (32 km/h) (20 miles/hour) (17 knots) (5 Bft) | 50%. 5/10. 4 oktas | 50%. 5/10. 4 oktas | 1000-1500 3281-4921 | 18.0 11.2 | 11.1 52 | |||||||||||||||||
13 | 17.2 63 | 748.3 29.46 997.65 997.65 | 753.8 29.68 1004.98 1004.98 | 1.5 0.06 2 2 | 72 | Wind blowing from the south-west | Fresh breeze (8 m/s) (29 km/h) (18 miles/hour) (16 knots) (5 Bft) | 100%. 10/10. 8 oktas | 100%. 10/10. 8 oktas | 600-1000 1968-3281 | 18.0 11.2 | 12.1 54 | No precipitation No precipitation | 6 | |||||||||||||||
12 | 16.3 61 | 747.7 29.44 996.85 996.85 | 753.3 29.66 1004.32 1004.32 | 1.5 0.06 2 2 | 76 | Wind blowing from the south-west | Fresh breeze (9 m/s) (32 km/h) (20 miles/hour) (17 knots) (5 Bft) | 100%. 10/10. 8 oktas | Rain (not freezing). | 100%. 10/10. 8 oktas | 300-600 984-1968 | 15.0 9.3 | 12.1 54 | ||||||||||||||||
11 | 17.7 64 | 747.2 29.42 996.18 996.18 | 752.8 29.64 1003.65 1003.65 | 1.0 0.04 1.33 1.33 | 78 | Wind blowing from the south-southwest | Moderate breeze (7 m/s) (25 km/h) (16 miles/hour) (14 knots) (4 Bft) | 40%. 4/10. 3 oktas | 40%. 4/10. 3 oktas | 600-1000 1968-3281 | 21.0 13.1 | 13.7 57 | |||||||||||||||||
10 | 16.8 62 | 746.8 29.4 995.65 995.65 | 752.4 29.62 1003.12 1003.12 | 0.5 0.02 0.67 0.67 | 85 | Wind blowing from the south-southwest | Moderate breeze (7 m/s) (25 km/h) (16 miles/hour) (14 knots) (4 Bft) | 90 or more, but not 100% 9/10 or more, but not 10/10 7 oktas or more, but not 8 oktas | 11.2 52 | 16.8 62 | 90 or more, but not 100% 9/10 or more, but not 10/10 7 oktas or more, but not 8 oktas | 300-600 984-1968 | 29.0 18.0 | 14.2 58 | 13.0 0.51 | 12 | |||||||||||||
09 | 15.9 61 | 746.2 29.38 994.85 994.85 | 751.9 29.6 1002.45 1002.45 | -0.6 -0.02 -0.8 -0.8 | 90 | Wind blowing from the south | Gentle breeze (5 m/s) (18 km/h) (11 miles/hour) (10 knots) (3 Bft) | 100%. 10/10. 8 oktas | Rain (not freezing). | 100%. 10/10. 8 oktas | 300-600 984-1968 | 45.0 28.0 | 14.3 58 | ||||||||||||||||
08 | 15.0 59 | 746.2 29.38 994.85 994.85 | 751.7 29.59 1002.18 1002.18 | -1.4 -0.06 -1.87 -1.87 | 94 | Wind blowing from the south | Gentle breeze (5 m/s) (18 km/h) (11 miles/hour) (10 knots) (3 Bft) | 100%. 10/10. 8 oktas | Drizzle, not freezing, heavy. | 100%. 10/10. 8 oktas | 200-300 656-984 | 29.0 18.0 | 14.0 57 | ||||||||||||||||
07 | 14.0 57 | 746.3 29.38 994.99 994.99 | 751.9 29.6 1002.45 1002.45 | -2.6 -0.1 -3.47 -3.47 | 91 | Wind blowing from the east-southeast | Moderate breeze (7 m/s) (25 km/h) (16 miles/hour) (14 knots) (4 Bft) | 100%. 10/10. 8 oktas | Drizzle (not freezing) or snow grains. | 11.2 52 | 14.0 57 | 100%. 10/10. 8 oktas | 300-600 984-1968 | 45.0 28.0 | 12.6 55 | 13.0 0.51 | 12 | ||||||||||||
06 | 13.5 56 | 746.8 29.4 995.65 995.65 | 752.4 29.62 1003.12 1003.12 | -4.2 -0.17 -5.6 -5.6 | 91 | Wind blowing from the east-southeast | Fresh breeze (8 m/s) (29 km/h) (18 miles/hour) (16 knots) (5 Bft) | 100%. 10/10. 8 oktas | Precipitation | 100%. 10/10. 8 oktas | 300-600 984-1968 | 7.0 4.4 | 12.1 54 | ||||||||||||||||
05 | 12.8 55 | 747.6 29.43 996.72 996.72 | 753.3 29.66 1004.32 1004.32 | -4.3 -0.17 -5.73 -5.73 | 93 | Wind blowing from the east-southeast | Fresh breeze (8 m/s) (29 km/h) (18 miles/hour) (16 knots) (5 Bft) | 100%. 10/10. 8 oktas | Rain. | 100%. 10/10. 8 oktas | 200-300 656-984 | 2.2 1.4 | 11.7 53 | ||||||||||||||||
04 | 11.5 53 | 748.9 29.48 998.45 998.45 | 754.5 29.7 1005.92 1005.92 | -4.0 -0.16 -5.33 -5.33 | 94 | Wind blowing from the east | Moderate breeze (7 m/s) (25 km/h) (16 miles/hour) (14 knots) (4 Bft) | 100%. 10/10. 8 oktas | Rain. | 100%. 10/10. 8 oktas | 200-300 656-984 | 3.1 1.9 | 10.5 51 | ||||||||||||||||
03 | 11.5 53 | 751.0 29.57 1001.25 1001.25 | 756.7 29.79 1008.85 1008.85 | -2.5 -0.1 -3.33 -3.33 | 91 | Wind blowing from the east-southeast | Moderate breeze (6 m/s) (22 km/h) (13 miles/hour) (12 knots) (4 Bft) | 100%. 10/10. 8 oktas | Rain, not freezing, heavy. | 100%. 10/10. 8 oktas | 300-600 984-1968 | 2.1 1.3 | 10.1 50 | ||||||||||||||||
02 | 11.7 53 | 751.9 29.6 1002.45 1002.45 | 757.6 29.83 1010.05 1010.05 | -2.5 -0.1 -3.33 -3.33 | 88 | Wind blowing from the east-southeast | Gentle breeze (5 m/s) (18 km/h) (11 miles/hour) (10 knots) (3 Bft) | 100%. 10/10. 8 oktas | Rain. | 100%. 10/10. 8 oktas | 1500-2000 4921-6562 | 6.0 3.7 | 9.8 50 | ||||||||||||||||
01 | 11.7 53 | 752.9 29.64 1003.78 1003.78 | 758.6 29.87 1011.38 1011.38 | -1.9 -0.07 -2.53 -2.53 | 89 | Wind blowing from the south-southeast | Gentle breeze (5 m/s) (18 km/h) (11 miles/hour) (10 knots) (3 Bft) | 100%. 10/10. 8 oktas | Rain. | 100%. 10/10. 8 oktas | 1500-2000 4921-6562 | 4.4 2.7 | 10.0 50 | 1.0 0.04 | 6 | ||||||||||||||