Culdrose, 08:00 to 10:00, 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, 0.3% of daylight visibility records missing, 2.0% of daylight precipitation records missing, 0.3% of daylight wind records missing.

This is the analysis for the average of 19 years  (1997–2015).
Time slot: 08:00 to 10:00  (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 2 1 1 2 2 2 2 2 1 1  18  5%
≤ 10 mph 5 6 6 5 5 7 7 9 7 7 6 5  75  21%
≤ 15 mph 9 9 10 10 10 13 13 14 12 10 10 9  130  36%
≤ 20 mph 10 11 11 13 12 14 14 15 14 12 11 11  148  41%
≤ 30 mph 12 12 13 14 14 15 16 16 15 13 12 13  167  46%
≤ 40 mph 13 13 13 16 16 16 16 17 15 14 13 15  177  48%
any wind 14 13 14 16 16 16 16 17 15 14 13 15  180  49%
‘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   −0.1 −0.1   −0.1       
≤ 10 mph +0.2       +0.1 +0.1   −0.1     −0.1     
≤ 15 mph +0.2 +0.2   −0.1 +0.1 +0.1   −0.1 +0.1 +0.1 −0.1 −0.1   
≤ 20 mph +0.1 +0.1 −0.1 −0.3       −0.2   −0.1 −0.1 −0.2  −0.1
≤ 30 mph   +0.1 −0.1 −0.2 −0.1 +0.1   −0.1     −0.1 −0.2  −0.1
≤ 40 mph +0.1 +0.2       +0.3   −0.1     −0.1 +0.1   
any wind +0.1 +0.3 +0.1   +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 19 18 17 19 19 19 19 19 17 18 19 22  225  62%

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 17 20 22 22 21 20 21 22 20 16 18  238  65%

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 2 2 3 2 2 3 3 3 3 3 2 2  30  8%
≤ 10 mph 8 9 10 9 9 12 12 14 13 11 10 8  123  34%
≤ 15 mph 16 17 19 18 18 22 24 24 21 20 18 15  232  64%
≤ 20 mph 19 20 22 23 23 26 27 26 25 23 21 18  273  75%
≤ 30 mph 24 24 27 27 28 29 30 30 28 27 25 24  324  89%
≤ 40 mph 28 27 29 29 30 30 31 31 30 30 28 29  352  96%

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.