HaNoi Weather

We googled and found some facts about the weather here.  We were confused about how it was only almost 90 degrees and 66% humidity one day (the coolest we've had so far!) and it felt way hotter than the hottest day we had in IL before leaving, which was upper 90's with 93% humidity.  We found the answer: the dew point.  We didn't realize the difference the dew point makes.  Now we know & have experienced it!  The weather here has been a bit hotter than usual, we have been told.  So when you read below, we are experiencing the high ends of the numbers listed.  Basically 89F with 98% humidity and 80F dew point.

Temperature

The month of September is characterized by gradually falling daily high temperatures, with daily highs around 31°C throughout the month, exceeding 34°C or dropping below 28°C only one day in ten.

Precipitation

The probability that precipitation will be observed at this location varies throughout the month. Precipitation is most likely around September 1, occurring in 61% of days. Precipitation is least likely around September 30, occurring in 47% of days.

Throughout September, the most common forms of precipitation are thunderstorms, moderate rain, and light rain.
Thunderstorms are the most severe precipitation observed during 55% of those days with precipitation. They are most likely around September 1, when it is observed during 38% of all days.
Moderate rain is the most severe precipitation observed during 25% of those days with precipitation. It is most likely around September 30, when it is observed during 15% of all days.
Light rain is the most severe precipitation observed during 18% of those days with precipitation. It is most likely around September 30, when it is observed during 11% of all days.

Humidity

The relative humidity typically ranges from 58% (mildly humid) to 98% (very humid) over the course of a typical September, rarely dropping below 43% (comfortable) and reaching as high as 100% (very humid).
The air is driest around September 30, at which time the relative humidity drops below 65% (mildly humid) three days out of four; it is most humid around September 1, rising above 95% (very humid) three days out of four.

Dew Point

Dew point is often a better measure of how comfortable a person will find the weather than relative humidity because it more directly relates to whether perspiration will evaporate from the skin, thereby cooling the body. Lower dew points feel drier and higher dew points feel more humid.
Over the course of a typical September, the dew point typically varies from 20°C (muggy) to 27°C (very oppressive) and is rarely below 16°C (comfortable) or above 29°C (very oppressive).

Wind

Over the course of September typical wind speeds vary from 0 m/s to 4 m/s (calm to gentle breeze), rarely exceeding 7 m/s (moderate breeze).
The highest average wind speed of 2 m/s (light breeze) occurs around September 29, at which time the average daily maximum wind speed is 4 m/s (gentle breeze).
The lowest average wind speed of 2 m/s (light breeze) occurs around September 9, at which time the average daily maximum wind speed is 4 m/s (gentle breeze).

(Anyone want to do the math to figure out how this would translate to mph??)

Source:
https://weatherspark.com/averages/33992/9/Hanoi-Vietnam