Si Wilai monthly weather averages

Average daytime temperature

The bar chart below shows the average monthly peak daytime temperatures at Si Wilai

Si Wilai average temperature chart (Celsius) Si Wilai average temperature chart (Fahrenheit)
Average monthly temperatures in Si Wilai (degrees centigrade and fahrenheit)
  Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
°C 27.7 29.8 32.5 34.1 33.1 32.1 31.8 31.2 31.4 30.8 29.4 27.5
°F 81.9 85.6 90.4 93.4 91.6 89.7 89.3 88.1 88.5 87.5 84.9 81.4

Please note: these are the average peak daytime temperatures (usually around mid-afternoon) so do not show daytime / night highs and lows. To see the daily range of temperatures have a look at the temperature max / min chart below.

Average rainfall & rainy days

The graph below shows the average rainfall and number of rainy days per month.

Si Wilai monthly rainfall chart (mm) Si Wilai monthly rainfall chart (inches)
Average monthly rainfall in Si Wilai (mm and inches)
  Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
mm 8 18 40 98 231 334 308 423 259 87 18 5
inches 0.3 0.7 1.6 3.9 9.1 13.2 12.1 16.7 10.2 3.4 0.7 0.2
Rainy days 3 4 6 10 17 21 21 24 18 9 3 1

Average annual rainfall in Si Wilai: 1950.1mm (767.8 inches)

Average daily sunshine

The bar chart below shows the average daily sunshine hours in Si Wilai

Si Wilai average daily sunshine chart
Average daily sunshine Si Wilai
  Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
Hrs sunshine 8.2 7.8 7.3 7.6 6.9 5.3 5.3 4.8 5.8 7.6 8.1 8.4

Day / night temperatures

The graph below shows the daily range of temperatures for each month.

Si Wilai average minimum / maximum temperatures (Celsius) Si Wilai average minimum / maximum temperatures (Fahrenheit)
Maximum and minimum daily temperatures in Si Wilai (degrees centigrade and fahrenheit)
  Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
Min °C 15.6 18 20.9 23.5 24.5 25 24.8 24.5 24.1 22.4 19.2 15.7
Max °C 28 30.1 32.8 34.4 33.4 32.3 32 31.4 31.6 31.1 29.7 27.8
Min °F 60.1 64.3 69.5 74.2 76 76.9 76.6 76 75.3 72.2 66.5 60.2
Max °F 71.2 75.2 80.2 84 84 83.5 83.1 82.2 82 80.1 75.9 71.1

Sea temperature

The graph below shows the average sea temperature.

Si Wilai average sea temperature chart (Celsius) Si Wilai average sea temperature chart (Fahrenheit)
Average sea temperature around Si Wilai in degrees centigrade and fahrenheit
  Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
°C 23.4 23.1 23.9 25.7 28.1 29.5 29.5 29.5 29.2 28.4 26.9 24.8
°F 74.2 73.6 75.1 78.3 82.6 85 85.1 85.1 84.5 83.1 80.5 76.6

Wind speed

The graph below shows the average wind speed.

Si Wilai average winspeed by month (km/h) Si Wilai average winspeed by month (mph)
Average wind speed in Si Wilai (mph and kmh)
  Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
km/h 5 6 6 5 5 4 5 4 4 5 5 5
mph 3 4 4 3 3 3 3 3 3 3 3 3

A monthly average windspeed of over 16km/h or 10mph suggests a location is fairly windy.

Relative humidity

The graph below shows the average relative humidity.

Si Wilai relative humidity averages
Average relative humidity in Si Wilai
Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
70% 69% 68% 71% 79% 84% 84% 86% 83% 78% 73% 71%

Other monthly averages

UV index Best time to go?

Si Wilai weather stats

Si Wilai weather statistics
Hottest month: April 34.1°C 93.4°F
Driest month: December 5mm 0.2ins
Sunniest month: December 8.4hrs
Coldest month: December 27.5°C 81.5°F
Wettest month: August 423mm 16.7ins
Warmest sea: July 29.5°C 85.1°F
Map showing location of Si Wilai (18.18188, 103.74793) Si Wilai map pin © Google

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