Climate Insights for Ilām

The climate in Ilām is warm and mild. The average annual temperature is 21°C and approximately 2715mm of precipitation falls per year. July is the wettest month, receiving around 933mm of rainfall. Ilām is in the Northern Hemisphere. Summer begins at the end of June and lasts through September. The summer months are: August, June, April. The coldest months are January, December, February, when temperatures can drop to 8°C.

Temperatures in Ilām vary considerably across the year, with a 21°C difference between the coldest and warmest months. The warmest month is August, when average highs reach 29°C and the mean temperature sits around 26°C. January is the coolest month, with minimum temperatures around 8°C and an average of 13°C. On average, daily temperatures fluctuate by about 9°C between overnight lows and afternoon highs. The sharpest temperature change occurs between October and November, with a 4°C shift in average temperatures.

Ilām is a very wet location, receiving approximately 2715mm of precipitation annually, which averages out to around 226mm per month. The wettest month is July, averaging 933mm of rainfall. August and June also tend to see above-average precipitation. The driest month is November, with just 3mm. That's 930mm less than July, the wettest month. Rainfall is heavily concentrated in certain months, creating a distinct wet and dry season. Visitors should plan around these patterns, as the difference between peak and low months is dramatic.

Ilām is relatively calm, with an average annual wind speed of 1km/h. For context, sustained winds below 12km/h are generally light, while anything above 25km/h is considered strong. The windiest month is April, averaging 2km/h, though still comfortable for most outdoor activities. The calmest conditions occur in October, with average winds dropping to 1km/h, making it an ideal period for wind-sensitive activities. There is moderate seasonal variation in wind speed, with a 1km/h gap between the calmest and windiest months.

It is currently spring in Ilām, which began on March 20, 2026. Ilām is in the Northern Hemisphere, where spring begins in March, summer in June, autumn in September, and winter in December. The warmest period peaks in August at around 29°C, while the coldest stretch bottoms out in January near 8°C. Summer is next, beginning on June 21, 2026 — 3 days from now.

The best time to visit Ilām is during February, March, April, October and November, when the weather is most comfortable for travellers. During these months, average temperatures hover around 20°C with modest rainfall averaging 52mm per month. By contrast, August can be uncomfortably hot with highs reaching 29°C, while January is the coldest period with lows dropping to 8°C. A light rain jacket is recommended, though showers are generally brief and shouldn't disrupt your plans.

The table below shows monthly climate averages for Ilām based on historical weather data. Min and max temperatures represent typical overnight lows and afternoon highs for each month, shown in degrees Celsius (°C). Precipitation is measured in millimetres (mm) and indicates the average total rainfall per month. Wind speed is the average sustained speed in kilometres per hour (km/h). All values are based on averages from over 10 years of historical weather data. The current month is highlighted for quick reference.