Culdrose, 08:00 to 10:00, 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: 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 5 6 5 5 7 7 8 7 7 6 6 ​ 74  20%
≤ 15 mph 9 9 10 11 10 12 14 14 13 11 10 10 ​ 131  36%
≤ 20 mph 10 10 11 13 13 14 15 15 14 12 11 11 ​ 151  41%
≤ 30 mph 12 12 13 15 15 16 16 17 15 14 13 14 ​ 171  47%
≤ 40 mph 14 13 14 16 16 16 17 17 16 15 14 15 ​ 182  50%
any wind 14 13 14 17 17 16 17 17 16 15 14 16 ​ 186  51%
‘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 −0.1   −0.1         ​−0.4
≤ 10 mph +0.1 −0.1 −0.1 +0.1 +0.1     −0.1     −0.1 +0.1 ​−0.1
≤ 15 mph +0.2 −0.1 −0.1   +0.1   +0.1 −0.1 +0.1 +0.1 −0.1   ​+0.3
≤ 20 mph +0.1       +0.2   +0.1 −0.1 +0.1 +0.1 −0.1 −0.1 ​+0.2
≤ 30 mph         +0.1 +0.1 +0.1   +0.1 +0.1   −0.1 ​+0.6
≤ 40 mph +0.1 +0.1 +0.1 +0.1 +0.2 +0.2 +0.1   +0.1 +0.2 +0.1   ​+1.3
any wind +0.1 +0.2 +0.1 +0.1 +0.2 +0.2 +0.1   +0.1 +0.2 +0.1 +0.1 ​+1.6
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 18 18 20 19 19 19 20 18 19 20 22 ​ 231  63%

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 23 21 21 21 22 20 17 18 ​ 241  66%

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 2 3 2 2 2 3 3 3 3 2 2 ​ 28  8%
≤ 10 mph 8 8 9 9 9 11 12 13 12 10 10 8 ​ 120  33%
≤ 15 mph 16 16 18 18 19 21 24 24 21 19 17 15 ​ 229  63%
≤ 20 mph 19 19 21 23 23 25 27 26 25 22 20 18 ​ 269  74%
≤ 30 mph 24 23 26 27 28 28 30 30 28 27 25 24 ​ 320  88%
≤ 40 mph 28 26 29 29 30 30 31 31 30 30 28 29 ​ 350  96%
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.