May 1997
Wet and dull - unlike Lerwick, a mere 50 miles to the north, which reported a sunny and dry month!
Lerwick had a rainfall total of 49.7 mm (80.2% of a normal 62 mm), while Fair Isle recorded 61.3 mm (156.7% of the usual 39.1 mm). We both had our wettest day of the month on the 25th - Lerwick with 17.2 mm and Fair Isle with 17.0 mm.
While Lerwick no doubt enjoyed their 172.4 hours of sunshine (117.3% of their long-term average 147 hours) - virtually identical with Fair Isle's 172.8 hours (87.1% of our normal 198.3 hours) - we were disappointed not to get our normally sunny May! However, Lerwick could only manage a mere 12.3 hours for their sunniest day (10th) against our 14.8 hours (23rd).
Both places recorded a slightly cooler (-0.3° Celsius) than average month with mean temperatures of 7.3° Celsius at Lerwick and 7.5° Celsius for Fair Isle.
 | Daily Data |
| Weather Diary |
1997 Day 1974-96 1997 Day 1974-96 Mean Max Temperature 9.1 9.4 Highest Max temp 11.9 15 17.7 Mean Min Temperature 5.4 5.8 Lowest Min temp -0.8 5 -1.6 Mean Sea Temperature 8.6 8.6 Lowest grass minimum -1.0 24 -7.6 30 cm Earth temperature 8.3 8.3 Days with ground frost 4 3.3 100cm Earth temperature 7.5 7.3 Days with air frost 1 0.3 Total Rainfall (mm) 61.3 39.1 Days with snow/sleet 6 2.5 Wettest Day (mm) 17.0 25 10.1 Days snow cover at 09hr 0 0.0 Rain Days ( 0.1mm +) 15 13.6 Days with hail 6 3.1 Wet Days (0.9mm +) 11 8.6 Days fog during 24hrs 7 9.2 Total sunshine, hrs 172.8 198.3 Days with fog at 09hrs 2 2.0 Sunniest day, hrs 14.8 23 14.7 Days with NIL sun 2 4.9 Mean wind speed, kts 14.4 13.2 Days with gale 1 0.7 Maximum gust, kts 52 1 47.9 Days with thunder 0 0.3 Mean Sea Level pressure 1014.6 1015.7 Days with aurora 0 0.1 Wind Direction% North 12.9 13.2 S. West 12.9 8.4 N. East 19.4 13.2 West 9.7 10.6 East 16.1 12.9 N. West 9.7 10.6 S. East 3.2 16.0 South 16.1 13.5 CALM 0.0 1.5
- To be uploaded later
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