Odiham, 12:00 to 14:00, 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: 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 2 2 2 1 1 1 1 1 1  15  4%
≤ 10 mph 4 4 6 6 7 9 8 8 8 6 5 5  74  20%
≤ 15 mph 9 10 14 15 16 18 17 18 18 13 11 11  170  47%
≤ 20 mph 13 13 18 18 19 21 21 21 22 18 15 15  213  58%
≤ 30 mph 15 15 20 20 21 22 22 22 22 20 16 16  231  63%
≤ 40 mph 16 16 20 20 21 22 22 22 23 20 17 17  236  65%
any wind 16 16 21 20 21 22 22 22 23 20 17 17  238  65%
‘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   +0.1 −0.1   −0.1     −0.1       
≤ 10 mph −0.1 +0.1 −0.1   −0.1   −0.1 −0.4 +0.1         
≤ 15 mph       +0.2 −0.2 +0.1   −0.1 +0.1 +0.2 −0.1     
≤ 20 mph −0.1 +0.1 +0.1 +0.2 −0.2 +0.1   −0.1 +0.1 +0.1 −0.3     
≤ 30 mph −0.2     +0.1 −0.1 +0.1 +0.1 −0.1 +0.1   −0.3     
≤ 40 mph −0.2   +0.1 +0.1   +0.1 +0.1   +0.1   −0.3 +0.1   
any wind −0.2   +0.1 +0.1   +0.1 +0.1   +0.1   −0.2 +0.2   
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 21 20 25 26 27 28 29 28 27 25 21 22  300  82%

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 20 19 23 21 22 23 23 23 23 21 20 21  257  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 2 2 1 1 2 1 2 3  23  6%
≤ 10 mph 7 7 9 8 8 10 10 9 10 7 9 10  104  28%
≤ 15 mph 18 17 20 20 21 22 22 23 22 19 18 18  240  66%
≤ 20 mph 24 21 25 26 27 27 28 29 27 26 25 24  309  85%
≤ 30 mph 28 26 30 29 30 29 31 31 29 30 28 29  349  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.