Culdrose, 10:00 to 12:00, 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, 0.3% 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: 10:00 to 12:00  (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 1 0 0 1 1 1 1 1 1 ​ 11  3%
≤ 10 mph 5 4 4 4 5 6 6 7 5 5 4 5 ​ 60  16%
≤ 15 mph 8 7 9 11 10 13 14 14 12 9 8 9 ​ 125  34%
≤ 20 mph 10 10 10 14 14 16 16 16 15 11 10 11 ​ 153  42%
≤ 30 mph 12 12 13 17 17 17 17 18 16 14 12 13 ​ 178  49%
≤ 40 mph 13 14 14 18 18 18 18 18 17 16 13 15 ​ 193  53%
any wind 14 14 15 19 18 18 18 18 17 16 14 16 ​ 198  54%
‘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                   ​−0.3
≤ 10 mph   −0.1 −0.1   +0.2 −0.1   −0.1         ​−0.1
≤ 15 mph +0.1 −0.1   +0.1 +0.2 −0.1 +0.1     +0.1 −0.1 −0.1 ​+0.3
≤ 20 mph +0.1 −0.2     +0.1   +0.2 +0.1   +0.1 −0.1 −0.1 ​+0.1
≤ 30 mph   −0.2   +0.1 +0.1   +0.2 +0.1   +0.1   −0.1 ​+0.2
≤ 40 mph       +0.2 +0.2 +0.1 +0.2 +0.1 +0.1 +0.1     ​+1.0
any wind     +0.1 +0.2 +0.2 +0.1 +0.2 +0.1 +0.1 +0.2 +0.1   ​+1.5
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 19 22 21 21 21 21 20 20 20 22 ​ 244  67%

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 17 18 20 22 23 22 21 23 22 21 17 19 ​ 245  67%

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 2 1 1 1 1 2 1 2 2 2 ​ 17  5%
≤ 10 mph 8 7 7 7 8 9 9 11 8 7 7 7 ​ 94  26%
≤ 15 mph 15 13 15 16 17 20 22 22 18 16 15 14 ​ 205  56%
≤ 20 mph 18 17 19 21 23 25 26 26 23 20 18 17 ​ 253  69%
≤ 30 mph 24 22 25 26 27 28 29 29 27 26 24 24 ​ 311  85%
≤ 40 mph 28 26 29 29 30 30 31 31 29 29 28 28 ​ 347  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.