Ratchaburi Weather & Climate: Best Time to Visit

With minimal seasonal shifts, Ratchaburi experiences a constant climate year-round. Typically, average maximum daytime temperatures range from a very hot 37°C (99°F) in April to a very warm 32°C (90°F) in the coolest month, December.

Nights vary from 27°C (81°F) in April to around 22°C (72°F) during the colder months.

Check out our detailed temperature page for more information.

Temperature ranges by month

Ratchaburi has a notably wet climate with abundant precipitation, recording 1183 mm (47 in) of rainfall per year. The climate in Ratchaburi shows significant variation throughout the year. Expect heavy rainfall in September, the wettest month, with an average of 221 mm (8.7 in) of precipitation over 19 rainy days.

In contrast, the driest month December offers drier and sunnier days, with around 12 mm (0.5 in) of rainfall over a single rainy day. For more details, please visit our Ratchaburi Precipitation page.

The mean monthly precipitation over the year, including rain, hail, and snow

The average number of days each month with precipitation

For those who appreciate different seasons, Ratchaburi serves as an ideal destination. Expect longer, more sun-filled days in December with an average of 8.8 hours of sunshine daily, and embrace the darker days in September, offering only 3.6 hours of daily sunlight.

Visit our detailed sunshine hours page for more information.

Monthly hours of sunshine

Daily hours of sunshine

The relative humidity is high throughout the year in Ratchaburi.

The city experiences its highest humidity in October, reaching 80%. In March, the humidity drops to its lowest level at 61%. What does this mean? Read our detailed page on humidity levels for further details.

Relative humidity over the year