Climate and monthly weather forecast
Nakhon Sawan, Thailand

Nakhon Sawan, situated in the heart of Thailand, experiences a Tropical wet and dry or Savannah climate, also known as Aw under Köppen climate classification. This type of climate results in a noticeable temperature variation throughout the year, as well as distinct wet and dry seasons.

Average high temperatures in Nakhon Sawan range from a mild 31.4°C (88.5°F) in December to an intense 38.1°C (100.6°F) in April. The warmer months tend to fall between March to May when temperatures hover in excess of 35°C (95°F). On the other end of the spectrum, nighttime temperatures have a more narrow variance, staying anywhere from 18.8°C (65.8°F) in December to a warmer 26.1°C (79°F) in April.

Relative humidity fluctuates from a low of 62% in March to a high of 83% in September. Rainfall follows a very distinctive pattern catering to the tropical monsoon climate, where downpours are almost negligible from January to February with monthly averages as low as 4mm (0.16") and 12mm (0.47"). Yet, precipitation escalates drastically between May to October, peaking at an astounding 237mm (9.33") in September, accompanied by a rainfall day count of 18 days.

Daylight hours show minor variation through the year, with December having the least at 11.2 hours and June boasting the most at 13.1 hours.

Taking into account both the temperature and the rainfall parameters, the optimal time to visit Nakhon Sawan would be during the late winter to early spring months, specifically from late January to early March. During this period, the average temperatures present a comfortable span from 32.1°C (89.8°F) to 35.2°C (95.4°F). Moreover, rainfall is scanty, offering a dry, hospitable climate.

Visitors keen on avoiding heavier dowpours should abstain from traveling to Nakhon Sawan between the months of June and October. Despite the reasonably warm temperatures, hovering from 32.5°C (90.5°F) to 35.9°C (96.6°F), these months substantiate the wettest period with rainfall peaking to a significant 237mm (9.33") in September. Additionally, the high humidity levels of up to 83% can create a rather uncomfortable, sticky ambiance.

Spring in Nakhon Sawan, approximately from March through May, characterizes the start of a warming trend with high temperatures climbing from 37°C (98.6°F) to 38.1°C (100.6°F). It's during this time the city also begins to experience a rise in both rainfall - elevating from 33mm (1.3") to a substantial 151mm (5.94") - and humidity levels that reach 73% by May. Despite the frequently rainy conditions, daylight hours increase to 12.9 hours in May.

Summer, extending from June to August, presents the wettest season in Nakhon Sawan with rainfall soaring to its zenith at 178mm (7.01") in August. This coincides with an increase in humidity, peaking at 79%, which may result in a markedly humid atmosphere. However, temperatures drop slightly relative to spring, oscillating between 33.6°C (92.5°F) and 35.9°C (96.6°F). Average daylight hours achieve a maximum of 13.1 hours for June, ensuring visitors ample sunlight for sightseeing.

Autumn in Nakhon Sawan from September to November, ushers in the practical conclusion of the wet season, as rainfall begins to decline from 237mm (9.33") in September to 27mm (1.06") in November. Still, humidity remains relatively high, reducing from 83% to 76%. Concurrently, daytime temperatures also cool off, offering a more comfortable range from 33.1°C (91.6°F) to 32.1°C (89.8°F).
Daylight hours begin to lessen, reaching a low of 11.4 hours in November.

Winter, encompassing December and January, welcomes a substantial decrease in both rainfall and humidity. Rainfall drops to as low as 4mm (0.16") in December, while humidity falls to 66% in January, making it the driest period. Daytime temperatures remain pleasantly warm, with averages fluctuating from 31.4°C (88.5°F) to 32.9°C (91.2°F), whilst night times cool off to as low as19.3°C (66.7°F) making it perfect for outdoor activities. Despite the shorter days with 11.2 daylight hours in December, the cool and dry winter season is indeed a delightful time to experience Nakhon Sawan.

In Nakhon Sawan, the weather in January is marked by a moderate climate. The average high temperature for this month is 32.9°C (91.2°F) and the average low is 19.3°C (66.7°F). This is likely due to the region's equatorial location and this contributes to its tropical climate. Weather in January »

Moving into February, the climatic pattern in Nakhon Sawan speaks of an increase in temperature levels. It's a moderately warm month with temperatures soaring to an average high of 35.2°C (95.4°F) from 32.9°C (91.2°F) in January. Weather in February »

March in Nakhon Sawan, witnesses a transition phase in the weather pattern. The temperature rises further, reaching a peak monthly average of 37°C (98.6°F). The minimum temperature also increases to an average of 24.7°C (76.5°F). Weather in March »

April in Nakhon Sawan is characteristic of a high-temperature month. The average high temperature reaches its peak at 38.1°C (100.6°F), about a degree higher than March. More noteworthy is the increase in rainfall, with the month recording an average of 64mm (2.52") over five days. Weather in April »

The weather in Nakhon Sawan in May is typified by a significant jump in rainfall. The city experiences an average of 151mm (5.94") - more than double the quantity received in April. This aggressively wet condition signifies the full swing of the monsoon. Weather in May »

June's weather in Nakhon Sawan continues to stay wet with the monsoon in full effect. The rainfall dips slightly to an average of 137mm (5.39") across 14 days. The temperature dips slightly to an average high of 34.8°C (94.6°F). The rainy conditions persist, maintaining high humidity levels around 74%. Weather in June »

July in Nakhon Sawan experiences a moderately high level of rainfall with average numbers measuring 148mm (5.83") over 16 days. The average high temperature lowers to 34.1°C (93.4°F), noting a gradual slide from the June readings. Weather in July »

August in Nakhon Sawan notes another surge in rainfall with higher average measures at 178mm (7.01") over 18 days. Accompanying this increase is a dip in temperatures with the average high hitting 33.6°C (92.5°F), maintaining the trend seen in July. Weather in August »

September ushers in the wettest period for Nakhon Sawan, the records indicate an average precipitation of 237mm (9.33") across 18 days. Correspondingly, the temperatures continue their gradual descent with the average high now at 33.1°C (91.6°F), signaling a move towards cooler conditions. Weather in September »

October in Nakhon Sawan brings about a relative break from the heavy rains. The month's rainfall decreases to an average of 153mm (6.02") over 14 days. Nonetheless, the humidity levels remain high, and when combined with an average high temperature of 32.5°C (90.5°F), a humid climate persists. Weather in October »

November in Nakhon Sawan welcomes a significant drop in rainfall, with only an average of 27mm (1.06") across four days. This reduction marks the end of the monsoon and the beginning of a drier season. Meanwhile, temperatures cool down slightly to an average high of 32.1°C (89.8°F). Weather in November »

The weather in Nakhon Sawan during December takes a dip, with temperatures averaging at a high of 31.4°C (88.5°F) and a low of 18.8°C (65.8°F). The city also welcomes a drier climate, with rainfall plunging to 5mm (0.2"), similar to the levels seen in January. Weather in December »