WEATHER REVIEW FOR 2015
Average temperatures slightly higher than normal, but not significantly so despite 2015 being the warmest year on record around the world. Rainfall below average – with a particularly dry start to Spring. Exceptionally mild in December.
Click here to view statistical summary for the year.
Click here to view monthly statistics.
Click here to view reports for previous years.
MONTHLY WEATHER REVIEWS AND CLIMATOLOGICAL SUMMARIES
Headline: A very changeable month - mild spells followed by colder periods and occasional light snow.
Headline: Generally cold for the first fortnight with a NW’erly flow, then slightly milder but more changeable during the second half.
Headline: Very dry with what little rain there was falling generally at the start and end of the month. Temperatures rising initially, but becoming rather changeable during the second half.
Headline: A dry month with rainfall significantly below average and with some warm sunny days around mid month more reminiscent of early summer than early spring.
Headline: Cool and cloudy. Rainfall back to normal following a very dry April.
Headline: Generally cool until the last week, although largely sunny. Rainfall significantly below average.
Headline: Despite a very warm start, much of July saw temperatures below average with a fair amount of rain, a significant proportion of which fell in two separate episodes during the third week.
Headline: A fairly average month. Mostly dry through the first half, and then becoming increasingly wet. Few very hot days.
Headline: Mostly cool and changeable apart from the final week which brought some warm autumnal sunshine
Headline: Very mild at times for October, but generally rather changeable with the country coming frequently under the influence of areas of high and low pressure.
Headline: Despite a brief cold spell during the third week, this was the mildest November since 2011.
Headline: Exceptionally mild, wet and windy. The mildest December on record by a significant margin.
CLIMATOLOGICAL STATISTICS FOR 2015
The Highest Maximum: 34.0 C on 1st July
The Lowest Maximum: 1.6 C on 19th January
The Highest Minimum: 16.4 C on 10th August
The Lowest Minimum: -4.0 C on 20th January
The Mean Maximum: 14.5 C
The Mean Minimum: 6.7 C
The Overall Mean: 10.6 C
Difference from the Yearly Mean: +0.1 C
Maximum (at 0900): 873.0 W/m^2 on 18th June
Mean (at 0900): 192.4 W/m^2
Highest Relative Humidity (at 0900): 100 % on 4th January, 4th February, 2nd April, 19th September, 21st & 24th October. 2nd & 4th November, 15th December
Lowest Relative Humidity (at 0900): 36.7 % on 22nd April
Mean Relative Humidity (at 0900): 82.7 %
The Highest Dew Point (0900): 19.1 C on 1st July
The Lowest Dew Point (at 0900): -3.8 C on 19th January
The Mean Dew Point (at 0900): 7.4 C
Total: 530.6 mm
Percentage of the Yearly Mean: 80.6 %
Duration: 475.2 hrs
Highest 24 hour fall (0900 to 0900): 17.8 mm on 24th July
Rain Days (>/=0.2mm): 160
Wet Days (>/=1.0mm): 115
Total Duration of Bright Sunshine: 1328.4 hrs
Sunniest day: 12.5 hrs on 18th April
No. of days without sunshine: 70
Percentage of the Yearly Mean: 95.4 %
Cloud cover (mean at 0900): 5.7 oktas
Pressure (reduced to sea level):
The Highest Pressure (at 0900): 1040.5 mb on 8th February
The Lowest Pressure (at 0900): 979.9 mb on 30th January
Mean Pressure (at 0900): 1017 mb
Run of wind (mean over 24 hrs): 110.3 miles
Mean daily wind speed: 6 mph
Run of wind (cumulative): 40261 miles
Highest Maximum Gust: 65 mph on 29th November
No. of gusts of 50mph or more: 8
Highest wind strength (at 0900): 26.5 mph on 4th February
Mean wind strength (at 0900): 7.1 mph
Winds from the Following Directions:
N 40 NE 23 E 23 SE 27 S 80 SW 69 W 32 NW 53 Calm 18
Lowest Grass Minimum -5.5 C on 12th January
Mean Grass Minimum 5.4
Lowest Concrete Minimum: -5.9 C on 3rd February
Mean Concrete Minimum: 6.1 C
Piche 870 ml
Hail <5mm: 4
Hail >/=5mm: 0
Snow or snow & rain: 11
Snow lying: 9
Air Frost: 26
Duration of Air Frost: 102 hrs
Ground Frost: 67
Wettest month: 62.1 mm in July
Driest month: 13.0 mm in June
Warmest month: 16.9 C~ in August
Coolest month: 3.8 C~ in February
Sunniest month: 208.0 hrs in June
Dullest month: 29.3 hrs in November
Windiest month: 7.9 mph~ in January
Calmest month: 3.0 mph~ in August