Muddy boots and poncho-wearing weather are arriving once again for
the men of the Division and the weather report predicts even more rain.
Mid-May is considered the beginning of the "rainy season" in the III Corps
Tactical zone. Rainfall increases everywhere as surges of southwest monsoons
appear over Southeast Asia. Most of the precipitation will come in the
form of late afternoon and evening thundershowers. The average number of
days of rainfall varies from 8 to 12 along the coastal areas to 15 to 20
days in the central portion of the zone and over 20 days in the mountains
and hills in the northeast. During May, thunderstorm activity reaches its
annual maximum. Cloudiness also increases over the III Corps Zone during
May. For the most part, visibility is good during May, but is often hindered
by early morning fog, especially near rivers. Most of the fog is formed
during the pre-dawn hours and disappears in the early morning. Also, during
May, the average temperature in the III Corps area will be 73 to 76 degrees.
Official temperatures are usually taken in shady places, so in the open
areas under the sun the temperatures will be in the nineties. The relative
humidity should range from 82 to 87 per cent. May also presents an increase
in turbulence because of the afternoon thunderstorms. For the month of
May,,personnel in the III Tactical Zone can expect more rain, high humidity
and a continuation of high temperatures."
"American Traveler", Vol. 29,
No. 12 (April 27, 1968)
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