Odiham, 14:00 to 16:00, 1997–2015
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Met Office station 862: Odiham, Hampshire  (RG25 1); OS grid reference: SU 737494.
Coordinates:  N51°14'17" W0°56'38"  (51.238 -0.944), elevation 118 m.
Note: gusts not recorded in 5 out of the 19 years.

This is the analysis for the average of 19 years  (1997–2015).
Time slot: 14:00 to 16:00  (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 1 1 2 1 1 1 1 1  13  4%
≤ 10 mph 5 5 6 6 7 7 7 7 8 6 5 5  73  20%
≤ 15 mph 11 11 14 15 16 17 17 17 17 14 13 11  175  48%
≤ 20 mph 15 14 18 19 19 21 21 21 21 18 15 15  216  59%
≤ 30 mph 16 16 20 20 21 23 23 22 23 19 17 17  236  65%
≤ 40 mph 17 16 21 21 21 23 23 22 23 20 17 17  241  66%
any wind 17 17 21 21 22 23 23 22 23 20 17 17  242  66%
‘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             
≤ 10 mph −0.1 +0.1 −0.2   −0.2 +0.2 −0.2 −0.4 +0.2   −0.1 −0.1  −0.1
≤ 15 mph     +0.1 +0.2 +0.1 +0.2 −0.1 −0.4 +0.3 +0.1 −0.2 −0.1   
≤ 20 mph −0.1   +0.1 +0.3   +0.1   −0.2 +0.1 +0.1 −0.3     
≤ 30 mph −0.2 −0.1   +0.2 +0.1 +0.1   −0.1 +0.1 −0.1 −0.3     
≤ 40 mph −0.2 −0.1 +0.1 +0.2 +0.2 +0.1   −0.1 +0.1 −0.1 −0.2 +0.1   
any wind −0.2   +0.1 +0.2 +0.2 +0.1   −0.1 +0.1   −0.2 +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 23 22 26 27 28 28 29 28 27 26 23 23  310  85%

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 19 18 22 21 22 23 23 22 23 21 19 20  254  70%

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 2 1 1 2 1 1 1 2 2  19  5%
≤ 10 mph 8 7 8 7 9 8 9 9 10 8 9 10  101  28%
≤ 15 mph 18 17 19 20 21 21 22 22 22 21 20 19  241  66%
≤ 20 mph 24 22 25 26 26 27 27 28 27 26 26 25  308  84%
≤ 30 mph 29 27 29 29 30 29 30 30 29 30 29 29  350  96%
≤ 40 mph 30 28 30 30 31 30 31 31 30 31 29 30  361  99%

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.