Coleshill, 08:00 to 10:00, 1997–2020
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Met Office station 19187: Coleshill, Warwickshire  (B46 3); OS grid reference: SP 210869.
Coordinates:  N52°28'48" W1°41'20"  (52.480 -1.689), elevation 96 m.
Note: gusts not recorded in 13 out of the 24 years, 4.4% of daylight visibility records missing, 4.6% of daylight precipitation records missing, 4.4% 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 2 2 3 3 3 4 5 4 4 4 3 3 ​ 39  11%
≤ 10 mph 8 8 9 11 12 15 16 15 13 12 9 9 ​ 138  38%
≤ 15 mph 12 12 14 17 18 20 21 21 18 17 13 14 ​ 197  54%
≤ 20 mph 13 13 15 18 19 20 22 21 18 17 14 15 ​ 206  56%
≤ 30 mph 14 13 16 19 20 21 22 22 19 18 14 15 ​ 212  58%
≤ 40 mph 14 14 16 19 20 21 22 22 19 18 15 15 ​ 213  58%
any wind 14 14 16 19 20 21 22 22 19 18 15 15 ​ 213  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 +0.1   +0.1 +0.1 +0.1       ​+0.7
≤ 10 mph +0.2 +0.2 +0.2 +0.4 +0.4 +0.2 +0.3 +0.3 +0.4 +0.2 −0.1   ​+2.7
≤ 15 mph +0.2 +0.1 +0.2 +0.5 +0.5 +0.1 +0.3 +0.4 +0.4 +0.2 −0.2   ​+2.6
≤ 20 mph +0.1   +0.1 +0.5 +0.4 +0.2 +0.3 +0.4 +0.4 +0.2 −0.3 −0.1 ​+2.2
≤ 30 mph +0.1   +0.2 +0.5 +0.4 +0.2 +0.4 +0.5 +0.4 +0.2 −0.3   ​+2.7
≤ 40 mph +0.2 +0.1 +0.2 +0.5 +0.5 +0.2 +0.4 +0.5 +0.4 +0.2 −0.2   ​+2.9
any wind +0.2 +0.1 +0.2 +0.5 +0.5 +0.2 +0.4 +0.5 +0.4 +0.2 −0.2   ​+2.9
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 21 20 22 23 24 24 27 26 23 23 21 23 ​ 276  76%

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 18 22 23 24 24 24 25 23 22 19 19 ​ 261  71%

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 8 7 7 6 6 7 7 7 8 8 9 7 ​ 88  24%
≤ 10 mph 19 17 19 18 19 22 23 22 22 21 19 19 ​ 239  65%
≤ 15 mph 27 25 27 27 28 28 30 30 28 29 27 27 ​ 333  91%
≤ 20 mph 29 26 29 29 30 29 30 30 29 30 29 29 ​ 350  96%
≤ 30 mph 30 28 31 30 31 30 31 31 30 31 30 30 ​ 361  99%
≤ 40 mph 31 28 31 30 31 30 31 31 30 31 30 31 ​ 365  100%
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.