Culdrose, 12:00 to 14:00, 1997–2015
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Met Office station 1393: Culdrose, Cornwall  (TR12 7); OS grid reference: SW 672257.
Coordinates:  N50°05'06" W5°15'25"  (50.085 -5.257), elevation 78 m.
Note: gusts not recorded in 6 out of the 19 years, 0.2% of daylight visibility records missing, 2.0% of daylight precipitation records missing, 0.2% of daylight wind records missing.

This is the analysis for the average of 19 years  (1997–2015).
Time slot: 12:00 to 14:00  (two hours); click below for any-hour analysis, or a different start time, or for whole day analysis (all times are GMT):

any-hour  06:00  08:00  10:00  12:00  14:00  16:00  18:00  all-day

‘Flyable days’ analysis

This is the number of days in each month, on average, for which (in this timeslot) the visibility was adequate, and there was no bad weather, and the wind speed was less than or equal to that shown on the left.
  Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Total
≤ 5 mph 1 1 1 0 0 0 0 1 0 1 1 1  6  2%
≤ 10 mph 4 4 4 3 4 5 6 6 5 5 4 4  52  14%
≤ 15 mph 8 9 9 11 11 13 13 14 13 10 9 8  127  35%
≤ 20 mph 9 11 11 14 14 16 15 16 15 12 11 10  155  42%
≤ 30 mph 12 14 14 17 17 18 17 18 17 15 13 13  185  51%
≤ 40 mph 14 16 16 19 18 19 18 19 19 16 14 15  202  55%
any wind 15 16 17 19 19 19 18 19 19 17 15 16  208  57%
‘Total’ shows the total flyable days, on average, in a year, and the same as a percentage.

Trend analysis

This is the average change (per year, over the 19 years) in the average number of days in each month for which (in this timeslot) the visibility was adequate, and there was no bad weather, and the wind speed was less than or equal to that shown on the left.

For example, if a value of +0.5 is shown for a given month then that implies that since 1997 the number of flyable days in that month has increased by (on average) half a day per year.
  Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Total
≤ 5 mph     −0.1         −0.1           
≤ 10 mph +0.1 −0.1 −0.2 +0.1   +0.1 −0.2 −0.2 +0.1         
≤ 15 mph +0.1   −0.1 +0.2 +0.2 +0.1 −0.1 −0.1 +0.1 +0.1 −0.1     
≤ 20 mph −0.1   −0.2 +0.1     −0.1 −0.1   −0.1 −0.2 −0.2  −0.1
≤ 30 mph −0.2 −0.1 −0.2   −0.1 +0.1   −0.1   −0.2 −0.1 −0.3  −0.1
≤ 40 mph −0.1     +0.1 +0.1 +0.3     +0.1         
any wind   +0.1   +0.2 +0.1 +0.3 +0.1   +0.1   +0.1    +0.1
Empty cells indicate negligible change; ‘Total’ shows the average trend over the whole year.

Visibility analysis

This is the number of days in each month, on average, for which (in this timeslot) the visibility was adequate. That is, for the entire timeslot:
  Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Total
Good days 20 20 20 22 22 21 21 22 22 21 21 22  252  69%

Bad weather analysis

This is the number of days in each month, on average, for which (in this timeslot) no bad weather occurred. That is, for the entire timeslot, there was no rain, hail, snow, snow on the ground, icing conditions, thunderstorms, etc.
  Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Total
Good days 18 19 22 22 23 23 21 23 23 21 17 18  250  69%

Wind speed analysis

This is the number of days in each month, on average, for which (in this timeslot) the maximum (gust) wind speed was less than or equal to the value shown on the left.
  Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Total
≤ 5 mph 1 1 1 0 1 0 0 1 1 1 1 1  10  3%
≤ 10 mph 6 5 6 5 6 7 9 9 6 6 6 5  77  21%
≤ 15 mph 13 13 15 16 16 19 21 21 18 16 14 13  194  53%
≤ 20 mph 17 16 19 21 22 24 25 25 22 20 18 16  246  67%
≤ 30 mph 23 23 24 26 27 28 29 29 26 26 24 23  308  84%
≤ 40 mph 28 26 29 29 30 30 31 31 29 29 28 28  348  95%

Please send any comments, questions, or corrections to me, Mike Cowlishaw, at mfc@speleotrove.com.

All text Copyright © Mike Cowlishaw 2008, 2017. All rights reserved. The pages and data here are for non-commercial use only.
This page was last edited on 2017-01-01.