Odiham, 12:00 to 14:00, 1997–2017
 Home 



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 21 years.

This is the analysis for the average of 21 years  (1997–2017).
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  16  4%
≤ 10 mph 4 4 6 7 7 9 8 8 8 6 5 5  75  21%
≤ 15 mph 10 10 14 15 16 18 17 18 17 13 11 11  172  47%
≤ 20 mph 13 13 18 19 20 21 21 22 21 18 15 15  214  59%
≤ 30 mph 15 15 20 20 21 22 22 22 22 20 17 16  233  64%
≤ 40 mph 16 16 20 21 21 22 22 22 22 20 17 17  238  65%
any wind 16 16 21 21 21 22 22 22 22 20 18 17  239  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 21 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                  
≤ 10 mph   +0.1 −0.1 +0.1 −0.1 +0.1 −0.1 −0.2   +0.1     −0.1
≤ 15 mph +0.1   −0.1 +0.3 −0.1     −0.1   +0.2   +0.1 +0.5
≤ 20 mph       +0.3   +0.1     −0.1 +0.1 −0.1 +0.1 +0.4
≤ 30 mph −0.1     +0.2   +0.1 +0.1       −0.2   +0.2
≤ 40 mph −0.1     +0.2 +0.1 +0.1 +0.1     +0.1 −0.1 +0.1 +0.4
any wind −0.1   +0.1 +0.2 +0.1 +0.1 +0.1     +0.1   +0.1 +0.6
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 21 21 25 27 28 27 29 28 27 25 21 22  301  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 22 21 22 23 23 23 23 22 21 21  259  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 2 2 2 2 2 2 2 1 2 1 2 3  23  6%
≤ 10 mph 8 7 8 8 8 10 10 9 10 8 9 10  105  29%
≤ 15 mph 18 17 20 20 21 22 22 23 21 20 19 19  241  66%
≤ 20 mph 24 21 25 26 27 27 28 29 27 26 25 25  310  85%
≤ 30 mph 28 26 29 29 30 29 31 30 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, 2018. All rights reserved. The pages and data here are for non-commercial use only.
This page was last edited on 2018-02-09.