The relative humidity in your location during the year? (climate, average, Chicago)

[Ariete]

For Turku, Finland in %:

time 00, 06, 12, 18 = mean
J 89, 89, 87, 89 = 89
F 89, 89, 82, 86 = 87
M 87, 89, 70, 79 = 81
A 83, 79, 56, 65 = 71
M 80, 69, 50, 56 = 64
J 82, 70, 53, 58 = 66
J 86, 74, 55, 61 = 69
A 89, 83, 58, 69 = 75
S 90, 89, 64, 79 = 81
O 90, 91, 76, 86 = 86
N 90, 91, 86, 89 = 89
D 91, 90, 89, 90 = 90

yearly mean by hour
00, 06, 12, 18 =

87, 84, 69, 76 = 79

[chicagogeorge]

Chicago/O'Hare and the three NYC stations

[chicagogeorge]

Ok lets try this again

[Ethereal]

Prospect, Sydney (only PM figures):

Jan: 52
Feb: 54
Mar: 55
Apr: 52
May: 57
Jun: 55
Jul: 50
Aug: 45
Sep: 45
Oct: 46
Nov: 50
Dec: 49

[mar89]

Rimini, Italy:

Jan: 83%
Feb: 79%
Mar: 76%
Apr: 75%
May: 75%
Jun: 72%
Jul: 72%
Aug: 74%
Sep: 76%
Oct: 81%
Nov: 84%
Dec: 84%

[Ethereal]

Originally Posted by mar89

Rimini, Italy:

Jan: 83%
Feb: 79%
Mar: 76%
Apr: 75%
May: 75%
Jun: 72%
Jul: 72%
Aug: 74%
Sep: 76%
Oct: 81%
Nov: 84%
Dec: 84%

Wow, it's sure rather humid than expected in an Italian city. Are these the AM humidity figures?

I mean a place at the Mediterranean in the middle of a summer afternoon wouldn't have a relative humidity around 75%...

[mar89]

Originally Posted by theropod

Wow, it's sure rather humid than expected in an Italian city. Are these the AM humidity figures?

I mean a place at the Mediterranean in the middle of a summer afternoon wouldn't have a relative humidity around 75%...

Yes they're AM figures from the airport but this is the average mean humidity (night and day)... in a summer afternoon RH is usually between 60 and 70% at the airport due to the constant sea breeze. Near the beach it often reaches 80%.

[B87]

London Heathrow

Jan: 94% -- 70%
Feb: 93% -- 65%
Mar: 92% -- 58%
Apr: 90% -- 50%
May: 90% -- 50%
Jun: 89% -- 49%
Jul: 90% -- 49%
Aug: 90% -- 50%
Sep: 92% -- 55%
Oct: 94% -- 63%
Nov: 95% -- 71%
Dec: 95% -- 75%

[istanbulmert]

Istanbul Kartal Station Average Humidity
Jan:78%
Feb:76%
Mar:74%
Apr:73%
May:70%
Jun:69%
July:68%
Aug:72%
Sep:72%
Oct:77%
Nov:79%
Dec:80%

[Ethereal]

Originally Posted by B87

London Heathrow

Jan: 94% -- 70%
Feb: 93% -- 65%
Mar: 92% -- 58%
Apr: 90% -- 50%
May: 90% -- 50%
Jun: 89% -- 49%
Jul: 90% -- 49%
Aug: 90% -- 50%
Sep: 92% -- 55%
Oct: 94% -- 63%
Nov: 95% -- 71%
Dec: 95% -- 75%

The afternoon humidity seems a lot higher on the NOAA website.

ftp://ftp.atdd.noaa.gov/pub/GCOS/WMO...I/UK/03776.TXT