Weather in Siddharthanagar

Find out what weather awaits you in the city of Siddharthanagar right now. Below, you will find up-to-date reports, forecasts, and visual charts to help you plan your journey with ease.

The climate in Siddharthanagar can be described as humid subtropical, with clearly defined seasons. The city's location on the Terai plains dictates the weather conditions: it can get truly hot during the spring and summer months, while remaining quite comfortable and mild in winter. Travellers should expect significant contrasts depending on the time of year.

Temperatures range from a cool 8–10°C at night in January to a sweltering 34°C during the day in April. Spring arrives quickly here, bringing warmth that soon turns into heat, while autumn (particularly October and November) offers pleasant temperatures around 20–25°C, perfect for excursions and walks.

The most significant weather phenomenon is the monsoon season. From June to September, humidity rises and the number of rainy days increases sharply, peaking in July and August when rainfall occurs almost daily. Conversely, winter is characterised by dry and clear weather: rain is extremely rare in November, December, and January, guaranteeing sunny days for your trip.

The climate in Siddharthanagar features significant temperature contrasts throughout the year. The hottest period falls between April and June, when the air warms up the most. April sees the highest daily maximums, averaging 34.1°C, creating a sensation of dry heat. June holds the record for the highest average temperature (29.2°C) but is accompanied by rising humidity.

The summer months, especially July and August, bring stable warmth with averages around 28°C. However, the nature of the weather changes: frequent rainy days make the heat humid and muggy. During this period, the difference between day and night temperatures becomes less noticeable, dropping to only about 5 degrees, creating a "tropical night" effect.

Winter in the region is mild and comfortable, without extreme cold, making it a popular time to visit. January is the coldest month, with an average temperature of 14.1°C. Travellers should be aware of noticeable daily fluctuations during winter and November: while days can warm up to a pleasant 20–22°C, nights can be cool, dropping to 8–10°C, so warm clothing for the evenings will be essential.

In Siddharthanagar, rainfall seasonality is clearly defined. The winter months and early spring are periods of dry weather. From November to March, rain is very rare. For instance, November and December record an average of just 1 rainy day each, with minimal precipitation. This time of year is excellent for travellers who prefer dry and clear weather.

The situation changes drastically with the arrival of summer and the monsoon season. The wettest months are July and August, when rain falls almost daily—statistics show up to 30 rainy days per month. June and September are also characterised by high humidity, marking the beginning and end of the peak rainy season, respectively.

The transitional period falls in April, May, and October, when the number of rainy days varies from 8 to 14. If you are planning a trip to Nepal during the summer months, be sure to prepare for rain, as the likelihood of precipitation is at its highest, whereas winter will delight you with stable dry conditions.

When packing for Siddharthanagar, it is important to consider that the city is located on the plains, where the climate is significantly hotter than in Nepal's mountainous regions. In the spring and summer months, when daytime temperatures often exceed +30°C, your wardrobe should be based on light, loose clothing made from natural, breathable fabrics such as cotton and linen. Be sure to ensure sun protection: a wide-brimmed hat or cap, high-quality sunglasses, and high SPF sunscreen are essential for comfortable walks.

If your trip is planned between June and September, be prepared for the monsoon season, when it rains almost daily. During this time, a compact umbrella or a light raincoat, as well as a waterproof cover for your backpack, will be indispensable. Regarding footwear, it is best to opt for sandals with non-slip soles or quick-drying trainers that can handle moisture and mud.

In winter, from November to February, the weather becomes dry and pleasant, though evenings and mornings can be quite cool, with temperatures around +10°C. For this season, we recommend dressing in layers: bring T-shirts for warm days, as well as a fleece jacket, jumper, or windbreaker to keep warm after sunset. Regardless of the time of year, comfortable, broken-in walking shoes are a must for excursions, as you will be doing plenty of sightseeing.