Best year time to visit Siam

General weather information about Siam

Average annual temperature is 11.5 °C

Absolute maximum temperature: 31.4 °C

Absolute minimum temperature: -12.2 °C

Number of sunny days: 164 days

Number of rainy days: 186 days

Number of snow days: 15 days

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* Weather data for Siam United States is based on climate observations for 2026 year

Siam air temperature forecast for each month

JanFebMarAprMayJunJulAugSepOctNovDec
Absolute maximum temperature (°C)15.919.517.727.029.730.931.330.731.428.419.416.5
Average daytime temperature (°C)5.19.08.416.921.024.927.426.124.017.210.58.4
Average temperature (°C)1.62.33.310.514.819.422.520.918.912.95.44.6
Average night temperature (°C)-1.3-2.1-0.55.19.214.318.116.414.59.21.71.9
Absolute minimum temperature (°C)-12.2-11.6-7.7-2.81.68.814.210.88.3-2.8-7.4-4.7

Siam monthly weather indicators

JanFebMarAprMayJunJulAugSepOctNovDec
Daylight maximum duration (h)10.011.012.013.014.015.015.014.013.011.010.09.0
Daylight mean duration (h)9.610.611.913.314.515.114.813.812.511.19.99.3
Daylight minimum duration (h)9.010.011.012.013.014.014.013.011.010.09.09.0
Sunshine mean duration (h)2.96.96.68.910.910.811.610.89.46.76.93.8
Precipitation (mm)1327098835915512911157603873
Sunny days7161113231671117151810
Rainy days18111617814242013151119
Snow days614000000112

Siam - weather forecast by months

Siam weather in januarySiam weather in februarySiam weather in marchSiam weather in aprilSiam weather in maySiam weather in juneSiam weather in julySiam weather in augustSiam weather in septemberSiam weather in octoberSiam weather in novemberSiam weather in december

Best time to visit Siam:

The best time to visit Siam during the most sunny months:

  • May — 10.9(h)
  • June — 10.8(h)
  • July — 11.6(h)
  • August — 10.8(h)

The largest precipitation sum in Siam is at

  • January — 132(mm)
  • June — 155(mm)
  • July — 129(mm)

    • Weather forecast in the closest to Siam admin centers

    Weather forecast in the closest towns to Siam

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    Frequently asked questions

    When is the best time to visit Siam?
    The historical weather data above shows the warmest, sunniest and driest months to help you choose the best time to visit Siam.
    What is the weather like in Siam?
    See average temperature, rainfall and daylight hours for Siam by month in the table above.
    How many sunny days does Siam have?
    The monthly weather statistics above show sunshine and rainfall patterns for Siam throughout the year.