Culdrose, 12:00 to 14:00, 1997–2020
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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 24 years, 0.2% of daylight visibility records missing, 1.6% of daylight precipitation records missing, 0.3% of daylight wind records missing.

This is the analysis for the average of 24 years  (1997–2020).
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 3 4 4 4 4 4 6 6 4 4 4 4 ​ 51  14%
≤ 15 mph 7 8 9 11 11 13 14 14 12 10 8 8 ​ 126  34%
≤ 20 mph 10 10 11 14 15 16 16 16 15 12 11 10 ​ 156  43%
≤ 30 mph 12 13 14 17 18 18 18 19 17 15 13 13 ​ 187  51%
≤ 40 mph 14 15 15 19 19 19 19 20 18 17 14 16 ​ 205  56%
any wind 15 16 16 20 20 19 19 20 19 17 15 17 ​ 211  58%
‘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 24 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   −0.2 −0.1 +0.1 +0.1   −0.1 −0.2         ​−0.5
≤ 15 mph   −0.2 −0.1 +0.1 +0.2 −0.1 +0.1 −0.1   +0.1 −0.1 +0.1 ​+0.1
≤ 20 mph   −0.2 −0.2 +0.1 +0.2   +0.2       −0.2   ​−0.2
≤ 30 mph −0.1 −0.2 −0.2   +0.1 +0.1 +0.2       −0.1 −0.1 ​−0.3
≤ 40 mph   −0.1 −0.1 +0.2 +0.2 +0.1 +0.2 +0.1       +0.1 ​+0.7
any wind     −0.1 +0.2 +0.2 +0.1 +0.2 +0.1 +0.1 +0.1   +0.1 ​+1.2
Empty cells indicate negligible change; ‘Total’ shows the sum of the trends 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 23 22 21 21 22 22 21 21 22 ​ 256  70%

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 23 24 22 22 24 23 21 18 19 ​ 253  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 0 1 1 1 ​ 10  3%
≤ 10 mph 6 5 6 5 6 7 8 8 6 6 6 5 ​ 75  20%
≤ 15 mph 13 12 14 16 17 19 21 21 18 16 14 13 ​ 191  52%
≤ 20 mph 17 15 19 20 22 24 25 25 22 20 18 16 ​ 242  66%
≤ 30 mph 23 22 24 26 27 28 29 29 26 25 23 23 ​ 305  83%
≤ 40 mph 28 26 28 29 30 29 31 31 29 29 28 28 ​ 346  95%
Please send any comments, questions, or corrections to me, Mike Cowlishaw, at mfc@speleotrove.com.

All text Copyright © Mike Cowlishaw 2008, 2021. All rights reserved. The pages and data here are for non-commercial use only.
This page was last edited on 2021-05-09.